JPS6016610B2 - copying device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying apparatus that has two document holding surfaces and arranges the document surfaces adjacent to each other in a dogleg shape.

Conventionally, when copying a book-shaped original, the open original is placed on a flat original holding surface, and the binding section, which is the center of the original, is pressed down from above to keep the image side of the original close to the holding surface. I'm letting you do it.

However, in the case of book-shaped originals, the vicinity of the binding portion inevitably rises above the holding surface, making it impossible to copy that portion properly.
Conventionally, a method has been proposed in which a stepped portion is provided on the document holding surface and the binding of the book-like document is aligned with the stepped portion to prevent the binding portion from lifting up. However, with this method, only one of the left and right pages of a book-like manuscript can be copied, and if it is desired to copy both pages, a great deal of effort is required to place the manuscript on the holding surface again. The present invention has been made in view of the above-mentioned drawbacks, and by providing a document holding surface in the shape of a 〈〈 and aligning the seam of the original with this bent portion, it is possible to prevent the document from floating from the holding surface near the seam. can.

Further, by optically scanning the above-mentioned < character-shaped original holding surface, it is possible to copy both the left and right pages of a book-shaped original at the same time.

Furthermore, by placing not only book-like originals but also sheet-like originals on the respective dogleg-shaped original holding surfaces, it is possible to copy two originals at the same time. The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of a copying apparatus according to the present invention. In the figure, 1 is a document holding surface 2a made of a transparent glass plate, etc.
, 2b are placed adjacent to each other in a 〈 shape.This is the edge of the bent portion. If the binding of the book-like original 3 is aligned along the edge 1, lifting of the original at the binding can be prevented. In addition, reference numeral 4 holds the manuscript 3 that has been transferred to the holding surfaces 2a, 2.
A document cover 5 is formed to match the shape of the document holding surfaces 2a and 2b in order to be in close contact with the document holding surfaces 2a and 2b.
This is a document support plate that prevents the document from sliding down, and is slidable parallel to the document holding surface 2b. Reference numeral 6 denotes a paper feeding cassette which is detachably attached to the main body and stores copy paper, and 7 is an operation panel having various operation keys for copying.

FIG. 2 is a sectional view showing the internal structure of the copying apparatus shown in FIG. 1. 8a and 8b are illumination devices that illuminate the original holding surfaces 2a and 2b; 9a and 9b are first lighting devices that guide light images from the originals on the original holding surfaces 2a and 2b to second movable mirrors 10a and 10b;
The moving mirrors 11a and 11b are mirror lenses for forming the optical images reflected by the second moving mirrors 10a and 10b on the photosensitive layer on the surface of the drum 13, and the optical images from the mirror lenses are is image-exposed onto the photosensitive layer of the drum 13 via fixed mirrors 12a and 12b.

The illumination devices 8a, 8b and the first movable mirrors 9a, 9
b are held by movable bodies (not shown) that move parallel to the document holding surfaces 2a and 2b, respectively. Further, the second movable mirrors 10a and 10b are also moved parallel to the document holding surfaces 2a and 2b, respectively, at the same speed as the moving body. By the movement of the optical system described above, the originals on the original holding surfaces 2a and 2b are optically scanned, and the photosensitive layer of the drum 13 is exposed as an image. here,
The drum 13 is divided into two parts A and B, respectively, in order to simultaneously expose the originals on the original holding surfaces 2a and 2b.
Form the image above. Around this drum 13, devices for image formation are arranged facing each other, and a corona charger 1 is provided.
4 is for uniformly charging each photosensitive surface A, B of the drum 13. 15 is a developing device for making a photosensitive electrostatic image formed by image exposure into a visible image by applying toner, and 16 is a toner visualized on paper appropriately fed from the paper feed cassette 6. A transfer corona charger that transfers the image; 17 a peeling unit that peels off the paper on which the toner image has been transferred from the photosensitive surface and sends it to the next process, the fixing device 18; 19 a cleaning device that removes toner remaining on the photosensitive surface. be.

Further, the toner image on the upper surface of the paper fed into the fixing device 18 is fixed as a permanent image, and then the paper is discharged onto the next paper output roller 2 and onto the trowel external tray 21. In the above configuration, the operation of the present invention will be explained below with reference to FIGS. 3 and 4. First, turn on the power switch on the operation panel 7.
It starts with doing. Thereafter, when the copying ready state is instructed, the copying operation is started by pressing the copying nail. This causes the drum 13 to rotate in the direction of the arrow. The rotational circumferential speed of this drum 13 is the same as the moving speed of the illumination device and the first movable mirror. As the drum 13 rotates, the corona charger 14 also acts to sequentially and uniformly charge the photosensitive surface B.
Then, as shown in FIG. 4a, when the drum 13 rotates half a turn, that is, the photosensitive surfaces A and B are reversed, each illumination device 8a, 8b,
The optical system including the first moving mirrors 9a and 9b starts to move as shown in FIG. 3a. At this time, the entire area of the photosensitive surface B is uniformly charged, and the photosensitive surface A is sequentially charged from the leading end as the drum 13 rotates. As the optical system such as the illumination device moves, images of both pages of the document 3 on the document holding surfaces 2a and 2b are simultaneously exposed to the charged surfaces of the photosensitive surfaces A and B, respectively. By this exposure, electrostatic latent images are formed on each of the photosensitive surfaces A and B, and are first developed from the photosensitive surface B by the developing device 15. After this development, the toner image is transferred onto the paper b fed from the paper feed cassette 6 as shown in FIG. 4b. The state shown in FIG. 4b shows the state after one rotation of the drum 13, and the photosensitive surfaces A,
The image exposure of B is completed as shown in FIG. 3b.
At this time, the action of the corona charger 14 is stopped. Subsequently, as the drum 13 rotates, the photosensitive surface B is developed and the paper b is
When the transfer to paper a is completed, development of photosensitive surface A and transfer to paper a begin (see FIG. 4c).

Meanwhile, the optical system is moved in the opposite direction to return to its original state as shown in Figure 3c. The moving speed at this time does not need to be synchronized with the rotational circumferential speed of the drum 13, and is generally fast. When the drum 13 rotates twice through the above operations, the copying of both pages of the original document 3 is completed, and the sheets b and a are discharged onto the tray 21 in this order through the peeling and fixing processes. Although the above explanation deals with copying a single sheet, the same applies to the case of copying multiple sheets. That is, after two rotations of the drum 13, the corona charger 14 is moved again, and the process is repeated until the counter for setting the number of copies reaches zero. Alternatively, the corona charger 14 is operated until the counter reaches 0, and after one revolution of the drum 13, as shown in FIG. For example, copying time is reduced. In the above embodiment, a case has been described in which the originals held on the original holding surfaces 2a and 2b are simultaneously copied, but it is also possible to copy only the original held on one of the original holding surfaces 2a or 2b.

For example, a copy mode changeover switch is provided on the operation panel 7. This mode changeover switch causes one of the optical systems to move. In the case shown in FIG. 2, it is preferable to move the optical systems 8b, 9b, and 10b that scan the document holding surface 2b. This is because exposure by moving the optical system is not affected by the optical systems 8a and 9a. Further, in this case, a latent image is formed on the photosensitive surface without the need to divide it into AB and A, respectively. As described above, the copying apparatus according to the present invention is capable of bringing a book-like bound document into close contact with the holding surface without causing it to float up, and can also be opened to copy both pages at the same time.

Furthermore, it is possible to copy not only book-like originals but also two sheet-like originals at the same time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the appearance of a copying apparatus according to the present invention;
FIG. 2 is a sectional view showing the internal structure of FIG. 1, and FIGS. 3 and 4 are diagrams for explaining the operation of the present invention.
FIGS. 4b and 4c are diagrams showing the moving state of the optical system that scans the document holding surface, and FIGS. 4a, b, and c are diagrams showing the rotating state of the drum. 2a, 2b: Document holding surface formed in the shape of <<, 8a,
8b: illumination device, 9a, 9b: first moving mirror, 10
a, 10b: second moving mirror, 13: drum, A, B
: Photosensitive surface corresponding to the holding surfaces 2a and 2b, 14: Corona charger, 15: Developing device. Cumulative/Scheme 2 Diagram 3 Chrysanthemum Diagram

Claims (1)

[Claims] 1 Document holding surfaces are formed in a dogleg shape, each of these document holding surfaces is provided with an optical device that scans the document holding surface and exposes an image onto a photoreceptor, and the photoreceptor is made to correspond to each of the document holding surfaces. A copying apparatus characterized in that the optical device forms an image corresponding to the document on the document holding surface on each of the divided regions of the photoreceptor.