JPS60186827A - Copying machine equipped with both-side copying function - Google Patents

Abstract

PURPOSE:To make both-side copying operations easier by exposing a photosensitive body while the lower surface of an original is optically scanned with the 1st optical system, and then, successively exposing the photosensitive body while the upper surface of the original is optically scanned by the 2nd optical system. CONSTITUTION:An original 8 is put between platen glasses 7. The lower surface of the original 8 is optically scanned by moving a light source 3a provided below the platen glass 7 together with a reflection mirror 2e from the left side to the right side of the figure, and the light of the 1st optical system composed of reflection mirrors 2d and 2f and a lens 4b is made incident on a photosensitive drum 5 after it is reflected by a reflection mirror 2h. Then the upper surface of the original 8 is optically scanned with the 2nd optical system composed of a light source 3b, reflection mirrors 2c and 2b, lens 4a, reflection mirror 2a provided at the upper side of the platen glass 7. The light of the 2nd optical system is made incident on the photosensitive drum 5 by rotating the reflection mirror 2h so that it faces the reflection mirror 2a. A control section 10 operates the reflection mirror 2h by driving a reversible motor 6 in accordance with positional signals. Therefore, both-side copying can be made without turning over the original.

Description

Detailed Description of the Invention (Technical Field) The present invention provides an optical scanning image of a first optical means that optically scans the first side of a document and an optical scanned image of a second optical device that optically scans the second side of the document. This invention relates to a copying machine equipped with a double-sided copying function in which photoconductors are sequentially guided.

(Prior Art) As a conventional copying machine equipped with a double-sided copying function, for example,
There is a system in which a sheet of paper on which the first side of the original has been copied is stored in a duplex tray, and then the second side of the original is copied onto the opposite side of the sheet that is ejected from the duplex tray.

According to this type of copying machine, it is possible to perform double-sided copying by manually or using a reversing mechanism to reverse the original placed on the platen after copying the first side, and then copying the second side. can.

However, with conventional copying machines equipped with a double-sided copying function, the original must be reversed, which hinders the speed of the copying operation, and the manual reversal operation is cumbersome.

(Objects and Structure of the Invention) The present invention has been made in view of the above.In order to efficiently copy both sides of a document, the present invention includes an optical system that guides reflected light from the bottom surface of the document onto a photosensitive drum. The present invention provides a copying machine that is provided with an optical system that is provided within a platen cover and guides reflected light from the upper surface of a document onto a photosensitive drum.

(Example) The copying machine according to the present invention will be explained in detail below.

Figure WJ1 shows an embodiment of the present invention, which has a platen glass 7 on which an original 8 to be copied is placed, and below the platen glass, a lower part of the original 8 is exposed. A light source 3a is provided movably along the lower surface of the platen glass 7. The optical system that guides the reflected light from the lower part of the document 8 to the photosensitive drum 5 includes a reflector @2e that moves together with the light source 3a, and a movable reflector 2d that refracts the reflected light from the reflector 2e toward the through lens 4b. , 2f and the reflection @'! ! The through lens 4b transmits the reflected light from the through lens 2f, and the reflective mirror 2h refracts the transmitted light from the through lens 4b toward the photosensitive drum 5. The reflective mirror 2h scans and exposes the lower surface of the original 8. In this case, the rotation of the reversible motor 6 maintains the angle at which the reflected light from the reflecting mirror 2f is incident on the photosensitive drum 5. Friend, an exposure lamp 3b for exposing the upper part of the original 8 is provided inside the platen cover 1 disposed above the platen cartridge.
is provided movably along the platen glass 7. The optical system that guides the reflected light from the top of the KJ and paper 8 to the photosensitive drum 5 includes a reflecting mirror 2C that moves together with the light source 3b, and a movable reflecting mirror that refracts the reflected light from the reflecting mirror 2c toward the in-mirror lens 4a. a mirror 2b; an in-mirror lens 4a that refracts the reflected light from the reflecting mirror 2b toward the reflecting mirror 2a;
The reflecting mirror 2h consists of a fixed reflecting mirror 2a that changes the optical path of the reflected light from the in-mirror lens 4a, and the reflecting mirror 2h that refracts the reflected light from the reflecting mirror 2a toward the photosensitive drum 5 side. When scanning and exposing the upper surface of the original 8, the rotation of the reversible motor 6 causes the reflection mirror 2a to
The reflected light is kept at an angle at which it enters the photosensitive drum 5.

In the above configuration, when the lower surface of the original is scanned with light II, as shown in FIG. The angle of incidence on the photosensitive drum 5 is maintained. In this state, the optical system within the main body starts operating and scans and exposes the lower surface of the document. When the optical system moves to the position indicated by the broken line in the figure and detects that the scanning is completed, it moves to the position shown in Figure 2.
The reversible motor 6 rotates in the direction (b), rotates the reflecting mirror 2h to an angle at which the reflected light from the reflecting mirror 2a enters the reflecting mirror 2g onto the C photosensitive drum 25, and then stops. After the reflecting mirror 2h is set at a predetermined position, the optical system within the platen cover starts operating to scan and expose the upper surface of the original 8.

Thereby, both sides of the original 8 can be accurately copied. In the above operations! J 7 < - The control of the flexible motor 6 is performed by a control unit (for example, a microcomputer) 10 that inputs a position signal corresponding to the position of the light source 38° 3b and outputs a control signal 41 (the control signal is not shown in the figure). (the reversible motor 6 is controlled via a drive circuit that does not operate). A control flowchart of the control unit 10 is shown in FIG.

The above embodiments are suitable for copying both sides of a document onto both sides of one sheet of copy paper (using a duplex tray), or for copying two sheets of paper in which both sides of the document are fed sequentially from the paper feed tray. It can be applied both when copying on paper.

(Effects of the Invention) According to the above-described copier having the double-sided copying function of the present invention, the optically scanned image of the first optical means that optically scans the first side of the original and the second side of the original are combined. Since optical scanning is performed and the optical scanning images of the second optical means are sequentially guided to the photoreceptor,
It is possible to speed up the copying operation, and it is possible to avoid giving the operator the trouble of reversing the original.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a state in which the lower surface of a document is scanned and exposed. FIG. 2 is an explanatory diagram showing a state in which the upper surface of a document is scanned and exposed. Third
The figure is a flowchart showing the operation of the present invention. Explanation of symbols 1...Platen cover, 2a to 2h...Reflector,
3a, 3b...Light source, 4a...In-mirror lens, 5...Photosensitive tram, 6...Reversible motor, 10...Control unit. Patent applicant: n±Zerozox Co., Ltd. Agent Patent attorney Shin Matsuhara 2 Patent attorney Seishunma Muraki Patent attorney Taira 1) Yudo Tadashi Patent attorney Oki Kamijima -- Patent attorney Hitoshi Suzuki Figure 1

Claims (1)

[Claims] a first optical means for optically scanning a first side of a document; a second optical means for optically scanning a second side of the document; and guiding optically scanned images of the first and second optical means to a photoreceptor. controlling a common optical path and an optical connection between the first and second optical means and the common optical path based on an optical scanning image of the first optical means and an optical scanning image of the second optical means; A copying machine equipped with a double-sided copying function, characterized in that it is provided with a control means for exposing a photoreceptor.