JPH02143266A - copying device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a copying machine that has an original holder for two pages of copy size and has an original division copying function.

(Prior art) When copying a book-like original, even if two pages are set on the original table in a spread format, in a normal copying machine, the original must be placed in accordance with a predetermined exposure area. Because it must be
When making single-sided copies, the original must be placed one side at a time. Therefore, the copying operation becomes very complicated and takes a lot of time when copying several pages. In order to solve these shortcomings,
As described in Japanese Patent Application Laid-open No. 19427, Japanese Patent Application Laid-open No. 51-120226, and Japanese Patent Application Laid-open No. 57-53769, a book-like original is placed on a document tray with two facing pages, and the document for two facing pages is placed. A copying machine with a split copying function has been proposed, which performs scanning exposure and copying on each side of a sheet of copy paper (duplex copying), or copying on two sheets of copy paper separately (page speed copying). There is.

[Problems to be Solved by the Invention] These copying machines are designed to perform copy processing by scanning and exposing a document on a document table in divisions based on predetermined document division reference positions.

When copying using such a copying machine, there is no problem with sheet-like originals or thin book-like originals, but when a thick piece of wood 3 is placed on the original platen 2 as shown in Fig. Part A rises from the original table 2. As a result, the original image moves closer to the center. If the divided copies of the transfer paper are stapled in such a state, the binding margin of one of the divided copies overlaps with the original image, making it impossible to see the binding margin.

Therefore, in order to prevent the overlap between the image near the gutter and the binding margin, it is necessary to place the book-like original with the position where you want to divide it accurately aligned with the predetermined division reference position, and also to You must press the document firmly and bring the throat as close to the document table as possible to copy.

However, such copying operations are troublesome, and pressing too hard against the spine of the tree can cause damage to the book. There is also a limit to how close the throat can be to the original maii stand.

As a means to solve this drawback, Japanese Patent Application Laid-Open No. 62-2312
As described in Publication No. 43, a proposal as shown in Fig. 2 has been made in which N manuscripts are scanned and exposed by overlapping by a predetermined dimension around the document division reference position at the time of divisional copying. As shown in Figure 2, for example, when binding the left side of a manuscript, there is a binding margin on side B, but there is no binding margin on side A, and conversely, when binding the right side of the manuscript, there is a binding margin on side B, but there is no binding margin on side A. had the inconvenience of running out of binding margin on the B side.

[Object of the Invention] An object of the present invention is to propose a copying apparatus in which the original image does not become invisible at the binding margin even when transfer sheets subjected to divisional copy processing are stapled.

Another object of the present invention is to provide a copying apparatus that facilitates placing a document on a document table during divisional copy processing.

(Means for Solving the Problems) The present invention, which solves the above-mentioned problems, has two document placement surfaces of a document placement table having two document placement surfaces of a desired copy size.
Split, rJ! , a divided copying function that scans and exposes the original on one side of the original document placement surface divided by the original dividing reference position and processes the copy, and then scans and exposes the original on the other divided side and processes the copy. The copying apparatus has means for inputting a duplicate copy dimension, and scans only one side of the divided document during division copying by overlapping the document by the duplicate copy input dimension centering on the document division reference position. It is designed to be exposed and copied.

As the means for inputting the overlapping copy dimensions, a switch or the like is provided to select an overlapping division copying mode when the overlapping copying dimensions are fixed, and by selecting the overlapping division copying mode, copy processing is performed with the specified overlapping dimensions. Alternatively, if you want to be able to set the ma copy dimensions arbitrarily, you may enter the duplicate copy dimensions arbitrarily using the numeric keypad for setting the number of copies when the overlapping division copy mode is selected. .

[Example] The exposure method of the copying apparatus of the present invention can be used in either a moving optical system type copying machine or a moving document table type copying machine, and in the following explanation, the optical system moving type copying machine will be used. Let's explain with an example.

The operation of the copying machine will be explained using FIG. FIG. 5 is a sectional view of a copying machine to which the present invention can be applied.

When the rotating photosensitive drum 1 rotates to a predetermined position, the original 3 placed on the original platen glass 2, which is an original placing table, is irradiated with light by an optical system 5 consisting of an illumination lamp 4, a reflecting mirror, and a lens. , the original image is transferred to the photosensitive drum 1 at the exposure section 6.
image on top.

The surface of the photosensitive drum 1 is charged by an f-covering device 7, and then when it reaches an exposure section 6, an original image is exposed by an optical system 5 to form an electrostatic latent image. The silence? The iJ itJ image becomes a toner image visualized by the developing device 8.

Next, the copy paper 15 sent from the paper feed section 14 comes into close contact with the photosensitive drum 1, and the toner image is transferred to the transfer paper 1 by the transfer device 9.
After the transfer is completed, the transfer paper 15 is separated from the photosensitive drum 1 by a separation device 10, and transferred to the fixing device 1.
1, the toner image is fixed and a copy is obtained.

On the other hand, the toner remaining on the photosensitive drum 1 after the transfer is cleaned by the cleaning device 12, and the next copying cycle is repeated.

In the case of double-sided copying, after single-sided copying processing, the copy paper is not ejected from the copying machine, but is inverted and docked in the intermediate stock 13 at the bottom of the copying machine, and the back side of the copy analysis is performed in the next copying cycle. Copy to! @It is designed to be filled in.

The features of the present invention will be described based on the above-described copying machine. As shown in FIGS. 1 to 4, the document table of this copying machine has a size that covers B4 size, and the case where a B5 size book is to be copied onto 85 size copy paper will be described as an example.

FIG. 1 and FIG. 3 are schematic explanatory diagrams of the upward movement of the document placing table of a copying machine for transferring a book-shaped original, and the document placement reference position when placing the document 3 on the document placing table 2. 21 is
Document division reference position 2, which is the division position of the document to be divided and copied
Same as 2.

In such a copying machine, when the document 3 is made of wood, for example, the throat A of the tree is aligned with the document placement reference position 21 located at the center of the document placement table.

Two sides of the original document 3 on the document placing table 2 can be placed on the document placing table at the same time in a two-page spread state, side A and side B (each B5 size) of 85 size.

FIG. 1 is an explanatory diagram showing a scanning exposure method and obtained copied images when carrying out the overlapping division copying process of the present invention. Third
The figure is an explanatory diagram showing a scanning exposure method and obtained copied images when performing conventional divisional copying processing.

The exposure area corresponding to the A side of the original g43 is the first exposure area, and the exposure area corresponding to the B side is the second exposure area t, z, f.
The fi copy size is a sentence.

In FIG. 2, the scanning exposure start position corresponding to the first exposure area L+ when performing overlapping division copy processing is al, the scanning exposure end position is 3, and the scanning exposure start position corresponding to the second exposure area L2. is el, and the scanning exposure end position is d. In FIG. 3, the scanning exposure start position corresponding to the first exposure area L when performing conventional divisional copying processing is al, the scanning exposure end position is b2, and the scanning exposure start position corresponding to the second exposure area L2. The position is C2, and the scanning exposure end position is d2.

As mentioned above, as is clear from FIGS. 1 and 3, in the case of the conventional divided copying process, the scanning exposure end position b2 corresponding to the first exposure area L1 and the scanning exposure end position b2 corresponding to the second exposure area L2 are The scanning exposure start position C2 is always the same position as the document division reference position 22.

On the other hand, in the case of the overlapping division copying process of the present invention, the first
The scanning exposure position for the exposure area L1 is the same as in the conventional divisional copying process, but the scanning exposure start position C3 corresponding to the second exposure area L2 is different from the scanning exposure start position C2 in the conventional divisional copying process. The overlap copying process 1 is shifted in the opposite direction to the first exposure area Ll, and the scanning exposure end position d corresponding to the second exposure area L2 is also shifted in the same way.

In addition, the conventional divided copy IA3! ! In the case of L, the entire copied image is shifted toward the throat side, and furthermore, the end of the tree is copied in a streaky manner on the opposite end side. For this reason, when the copy paper is stapled at the throat side, the binding margin and a portion of the copy image overlap.

However, in the case of the duplicate copying process of the present invention, the original image on the side to be copied, the throat part, and a part of the original image on the other side are copied together, and furthermore, the copied image on the side to be copied is not copied. Since the image is copied in the center of the paper, the binding margin becomes part of the original on the other side, and the binding margin does not overlap with the original image on the side to be copied. Also, on the 8th side, in Figure 1, only the sword is overlapped and scanned, so the right side ρ
This part cannot be copied, but since this part is only copied in a striped manner at the end of the book, there is no problem even if it is no longer copied.

tJ Oh, in Figure 1, we explained that when copying the 8th side, a part of the A side should be duplicated, but depending on the orientation of the original and the position of the binding margin, it may be the opposite of what is shown in Figure 1. Even if a part of the B side is duplicated when copying the A side, the effect is exactly the same, and it is also convenient to provide an external switching means to make the switching longer.

(Other Embodiments) FIG. 4 shows another embodiment of the present invention, in which a sensor S for detecting the density of the original is provided in the original dividing section.

The present invention explained in FIG. 1 is effective when a thick book is used as the manuscript. If the wood is thick, the throat portion A will float above the document table 2, so the density of the document in this portion will be higher. FIG. 4 is characterized in that when the divided copy mode is set and the density of the sensor S becomes darker than a predetermined value, the divided overlapping copy mode explained in FIG. 1 is automatically set. did.

This allows the user to save time and effort in setting the split/duplicate copy mode.

(Effects of the Invention) As explained above, when a thick piece of wood is placed on the document mounting table and the throat is raised above the document mounting table and the throat is divided into copies, the image near the throat approaches the throat. This has the effect of preventing images near the binding margin and the gutter from overlapping, and furthermore, it becomes easier to place the document on the document table.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram illustrating an overlapping division copying operation according to an embodiment of the present invention; FIG. 2 is an explanatory diagram illustrating conventional overlapping division copying; FIG. 3 is an explanatory diagram showing conventional division copying; The figure is an explanatory diagram showing another embodiment of the present invention, and FIG. 5 is a sectional view of a copying machine to which the present invention can be applied. 2 is a document placement table, 3 is a document, 21 is a document placement reference position,
Reference numeral 22 indicates a document division reference position, A indicates a throat portion, and S indicates a sensor. Tojima (" Figure 4 Burmese)

Claims (3)

[Claims] (1) Divide the document placement surface of a document placement table that has two document placement surfaces of the desired copy size into two, and document on the two sides of the document placement surface divided by the document division reference position. In a copying machine that has a division copying function that scans and exposes the document on the other side of the divided document to perform copying processing, when performing divisional copying, one of the divided document surfaces
A copying apparatus characterized in that a copying process is performed by scanning and exposing a surface of a document overlapping by a predetermined dimension from a document dividing reference position. (2) The copying apparatus according to claim 1, further comprising input means for inputting dimensions for overlapping documents. (3) A sensor for detecting image density is provided near the division reference position, and scanning exposure is automatically performed when the image density near the division reference position is higher than a predetermined value. The copying apparatus according to item 1 or 2.