JPS5968757A - Double-side copying machine - Google Patents

Abstract

PURPOSE:To remarkably reduce the labor required for making double-side copying, by performing the copying work onto both surface and rear of a copying paper based on one time machine operation by an operator. CONSTITUTION:When an operation button for double-side copying B1 is pressed, optical scanning is started to an original OG1 and the latent image of the original OG1 is formed on the surface of a photosensitive drum 41, thus, the copying is performed. The copying paper CP, whose surface has been used for copying the original OG1, is sent to a copying paper inverting mechanism 80 and again supplied to a copying section 40 after it is inverted upside down. When the inverted paper CP arriving at a prescribed location is detected by a sensor 62, optical scanning to another original OG2 which is to be copied onto the back of the copying paper CP is started. Then the latent image of the original OG2 is formed on the surface of the drum 41 by the copying section 40 and the copying is performed. When such an arrangement is used, the labor required for making double-side copying can be reduced remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double-sided copying machine, and more particularly to a copying machine that enables copying on both the front and back sides of a copy sheet with a single mechanical operation.

When attempting to copy both the front and back sides of a single sheet of copy paper using a general copying machine, place the original to be copied on the front side in a predetermined position on the trenchless platen and set the front side of the copy paper in the paper feed power set. After copying the rice, take out the copy paper from the output tray, place the copy paper back in the center on the paper feeder, and then copy the original on the platen on the front side. It was necessary to replace the original with the desired original and repeat the same mechanical operation again.This is where the double-sided copying machine came into play. In other words, this double-sided copying machine was developed with the purpose of easing the hassle of copying on both the front and back sides of a single sheet of copy paper as described above. It has a function to automatically refeed copy paper to the copying machine groove.

However, although the advent of such double-sided copying system has saved the trouble of handling the above-mentioned copying layer, it has also increased the trouble of exchanging the original for front side copy placed on the platen with the original for front side copy. , and the trouble of repeating machine operations every time these originals are replaced is no different from the trouble of making double-sided copies using the general copying machine mentioned above, and it is still unavoidable.Especially when printing multiple sheets. This problem is also serious when double-sided copying is performed.

This invention is based on the above formula f'1. It is an object of the present invention to provide an internal copying machine capable of copying both the front and back sides of copy paper based on a single machine operation by an operator.

That is, the present invention sets at least two original reading start positions corresponding to the front side copy desired original and the back side copied original placed simultaneously on the platen at different positions ζ in the optical scanning direction, that is, the original reading direction. , the predetermined light scanning for copying is performed from the different document reading start positions set above when the copy paper is first supplied to the copying mechanism and when the inner sheet is turned upside down, and at predetermined timings respectively. This is what I did.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A double-sided copying machine according to the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

FIG. 1 schematically shows the internal structure of an embodiment of a double-sided copying machine according to the present invention, and the overall structure and operation of the copying machine will first be explained with reference to FIG. 1. do. However, in this embodiment, the platen itself is moved and placed on top of it! 1. A so-called moving platen type copying machine that performs optical scanning on a printed original is taken as an example.

That is, in FIG. 1, 10 is the above-mentioned moving type platen, and the calligraphy +-pt information of the original OGI or OG2 placed on E is illuminated by light from the light source 20 and on the platen O in the figure. The light is scanned based on the movement in the direction of arrow F1, and the reflected light at this time is reflected m3t,
The light is incident on the photosensitive drum 41 through an optical system constituted by a lens 32 and a lens 33.

As a result, the surface of the photoreceptor drum 41 is coated with the original OG1.
Alternatively, a latent image corresponding to the document and image information of OG2 is formed.

However, in this embodiment, the above-mentioned original OGI is the original for which the front side is to be copied, and the above-mentioned original OG2 is the original for which the back side is to be copied. The above-mentioned optical scanning is performed. This optical scanning mode constitutes the main part of the present invention, and will be explained in detail later with full reference to FIGS. 2 and 3.

Now, in the copying machine shown in FIG. 1, if the operator presses the operation button B1 for double-sided copying, copy paper CP is fed into the copying machine from the paper feed center 50 in the manner shown in ■ in the figure. At the same time, the scanner 61 carries out the above-mentioned optical scanning of the surface object F9 [desired original OGI].
A latent image corresponding to the calligraphic information of the GI is formed, and the copying unit 40
During this time, the above copy paper CP progressed to the state shown in ■ in the figure.
The latent image formed on the photosensitive drum 41 is copied. Here, copying refers to the well-known photographic process consisting of the steps of development, transfer, and fixation, and detailed explanation thereof will be omitted. The copy paper CP on which the image has been printed on its surface enters the copy paper reversing mechanism 80 in the manner shown by ■ in the figure, where it is reversed from front to back and is again fed to the copying section 4 in the manner shown in ■ in the figure. That's how it progresses. Note that 70 in the figure is a copy paper sorting mechanism, and for example, when the operator presses the operation button B1 for double-sided copying, and the sensor 6
1, it is opened on the condition that it is detected that the copy paper CP has been supplied (a mode shown by the solid line in the figure), and the copy paper CP is advanced to a predetermined position via the reversing machine M80, and a sensor indicating this is detected. Closed on the condition that it is detected by 62 (
The state shown in broken part 1 in the figure is as follows. Now, when the copy paper CP that has been turned upside down is in the state shown by ■ in the figure, and the sensor 62 detects the line in which the copy paper CP has advanced to a predetermined position, the sorting mechanism 70 is closed and upon this detection. At the same time, the above-described optical scanning is started for the original OGI for the front side and the original OG2 for the back side, which is placed simultaneously in the original scanning distortion direction, that is, in the original reading direction. However, the optical scanning for this original OG2 is performed by mark A in the figure.
It is assumed that the platen 10 is controlled by a means described later so that the platen 10 is moved in the direction of the arrow F1 from the position where the mark B coincides with the mark B. As a result, a latent image corresponding to the graphic information of the original document OG2 is formed on the surface of the photosensitive drum 41, which has been appropriately cleaned and neutralized after the copying by the copying section 40, and as described above, the copying section 40 During this time, the latent image formed on the photosensitive drum 41 is copied onto the copy paper CP (back side), which has progressed in the manner shown in (3) in the figure. The copy paper CP, which has been copied on both sides as described above, is stored in the drain tray 90 via the sorting mechanism 70 as shown in (3) in the figure.

In this copying machine, when the operator presses the operation button B2 for normal single-sided copying, the sorting mechanism 70 is maintained in the closed state, and the copy paper CP is distributed in the modes shown in ■ and ■ in the figure. After passing through, the water is stored in the drainage tray 90. Of course, in this case, only the calligraphy information of the original OG1 whose front surface is desired to be copied is copied onto the copy paper CP.

Next, the moving type platen 10 and the light source 20
FIG. 2 shows an example of the specific configuration of the optical transport means for the placed original, which is composed of the above-mentioned platen. 10
The transfer@control method, that is, the optical scanning method of this embodiment, is as follows.
I will clarify. However, in FIG. 2, illustration of the optical system shown in FIG. 1 is omitted for convenience.

Now, as shown in FIG. 2, a moving type platen 10 has a guide rod 13 at one longitudinal end thereof and a groove 1 fitted therein, and a conveyor 11 at the other end fitted into an operating rod 12 having a cam groove. The Ibr is configured to be movable in the direction of the arrow F1 in the figure according to the rotational movement of the single working rod 12. The guide rod 13 has supports 14 and 22
The operation rod 12 is supported by a support member 21 at one end thereof.
The other end of the motor 1 is supported by a drive source via a transmission means 120 and a clutch means 110.
00.

The upper surfaces of the supports 21 and 22 are processed so that they can slide on the platen 10, and a light source 20 is disposed between the supports 21 and 22. The clutch means 110 also includes a transmission means 1.
A photoreceptor drum 41 is connected via 30, and the photoreceptor drum 41 is rotated in response to the movement of the platen 10.

On the other hand, the supports 14 and 22 of the guide rod [3 have
As shown in the figure, a substantially U-shaped arm 15 is provided across the body, and a sensor 7 such as a proximity switch is provided in the arm 15 at a position corresponding to the mark B (see FIG. 1). There is. This sensor 17 is used to determine the movement start position of the platen 10 in the above-mentioned ventral photographing process, and detects this line when it faces the magnet 16 provided at one end of the conveyance body 11 and detects drowsiness. Output a signal.

In addition, the sensor 17, the clutch means 11o1, the light source 20 shown in FIG. are connected to each other as shown in FIG. 3 through a controller 200, and the duplex copy operation button 131, which is operated by the operator, can be used to input the duplex copy size or one-sided copy button B.
The controller 200 controls the operation mode of the copy paper sorting mechanism 70, the switching mode of the clutch means 110, and the switching mode of the light source 20 based on the drowsiness signal from the sensor 2, the detection output of the sensor 61 or 62, and the detection output of the sensor 7. Controls the lighting/extinguishing mode.

(See figure) Respectively front side copy desired original OGI and back side copy r
3F is placed (see FIG. 1) and the double-sided copying operation button B1 is pressed, the controller 200 first detects with the sensor 61 that the copy paper CP has been fed into the copying machine. At this point, the copy paper sorting mechanism 70 is controlled to open, the light source 20 is turned on, and the manner in which power is transmitted from the motor 100 to the clutch means 110 is controlled to start moving the platen 10 #h. ,
Then, the full rotation of the photosensitive drum 41 is started. As a result, the above-mentioned optical scanning of the original OGI desired for front side copying and copying of the calligraphic information of the original OGI onto the copy paper CPI are performed, and the copied copy paper CP is reversed by the copy paper reversing mechanism 80 (however, various It is assumed that the conveying rollers and the copying section 40 are also performing well-known operations correspondingly. In addition, the platen 1 that was moved above
0 is pulled back to the movement start position of the trailing curtain which has been moved by a predetermined distance in the above-mentioned surface copying process, and the light source 20 is turned off at the time when the platen 10 is pulled back. Next, when the sensor 62 detects that the above-described copying has been performed and the reversed copy paper CP has been returned to a predetermined position, the controller 200 controls the copy paper sorting mechanism 70 to close. Clutch means 11
The platen 10 is moved in advance to a position where the magnet 16 faces the sensor 17 via 0
The entire movement in one direction is started, and the rotational drive of the photosensitive drum 41 is started in the same manner as in the previous surface copying step. As a result, the above-mentioned optical scanning of the original document OG2 whose back side is desired to be copied and the copying of the calligraphic information of the original document OG2 onto the copy paper CP (however, the back side) are performed, and the copy paper CP copied on both sides is transferred to the above-mentioned distribution in the closed state. i Shallow groove 7
0 and is stored in the drainage tray 90. The moved platen 10 is moved a predetermined distance required for the backside copying process described above and then returned to its initial position, and the light source 20 is turned off at the time when the platen is moved back.

In addition, in normal use of the copying machine, the operator places an appropriate document to be copied on the front surface copy desired document designation position 0GIS on the platen 10, and presses the one-sided copy operation button B2.
is pressed, the controller 200 operates at the time when the operation button B2 is pressed or when the copy paper CP is pressed.
When it is detected by the sensor 61 that paper has been supplied into the copying machine, the copy paper progress mechanism 70 is controlled to close, the light source 20 is turned on, and the movement of the platen 10 is started via the clutch means 110. And photoreceptor draft 4
1 starts rotational drive. As a result, the placed document is optically scanned and the calligraphic information of the document is copied onto the copy paper CP, and the copied copy paper CP is transferred to the discharge tray 90 via the distribution mechanism 70 in the closed state. will be stored in. The platen 10, which has been moved by −h, is returned to the movement start position of the trailing curtain, which has been moved by a predetermined distance during the copying process described above, and the light source 20 is turned off at the time when the platen 10 is returned.

As described above, by configuring the copying machine as shown in FIGS. 1 to 3, not only single-sided copying but also double-sided copying can be visually performed with a single machine operation.

Note that in the embodiment described above, the sensors 61 and 62
Although the sequence control of the front side copying process and the back side copying process is performed based on the detection output of , the above-mentioned sequence control may be performed based on a time signal corresponding to the process cycle of the entire copying machine. .

Furthermore, in the above-described embodiment, the platen 10 is returned to its original position even after the optical scanning of the original OGI whose front side is desired to be copied during double-sided copying is completed. At this point, the platen 10 is stopped, and the next original desired to be copied on the back side is
It is also possible to continue the optical scanning for G2 from the stop position.

Furthermore, by selecting the placement position of the sensor 17, it is possible to successfully copy both sides of a double-sided document, for example, even in the case of a two-page spread document in which the front-side copy desired original OGI and the back-side copy desired original OG2 cannot be separated. Of course, a plurality of sensors corresponding to this sensor 17 may be provided, and the sensor to be used may be appropriately selected according to the specifications of the document.

Further, the configuration of the controller 200 having the above-mentioned functions is arbitrary and can be easily configured using a well-known logic circuit, an analog arithmetic circuit, a microcomputer, or the like.

By the way, in the above-mentioned embodiment, the double-sided copying machine according to the present invention was applied to a moving platen type copying machine.
It goes without saying that the present invention can be similarly applied to a type of copying machine in which the light source 20 moves to optically scan an original placed on the platen 1 ( ).

As explained above, according to the double-sided copying machine of the present invention, copying can be performed on both the front and back sides of copy paper based on a single machine operation by the operator, and the effort required when performing double-sided copying can be greatly reduced. It can be relaxed.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional ψ11 view showing an example of the internal structure of a double-sided copying machine according to the present invention, and FIG. 2 shows a specific example of the structure of the phototaxis section, that is, the document reading section of the copying machine shown in FIG. 1. The perspective view and FIG. 3 are block diagrams showing the electrical connections of the main parts of the copying machine shown in FIGS. 1 and 2 related to the present invention. DESCRIPTION OF SYMBOLS 10...Platen, 11...Transportation body, 12...Operation rod, 13...Guide rod, 14, 21, 22...
- Support body, 15... Arm, 1b... Magnet, 17.
61, 62...Sensor, 20...Light source, 3]. 32...Reflector, 33...Lens, 40...Copy unit, 41...Photosensitive drum, 50...Paper feed cassette, 70...Copy paper sorting mechanism, 8(). ...Copy paper reversing mechanism, 90...Ejection tray, lOO...Motor, 110...Clutch means, 120.030...
-Transmission means, 200...controller.

Claims (1)

[Claims] A platen on which a document is placed, a light source for illuminating the document placed on the platen, and a scanning means for optically scanning the document by moving the platen or the light source. a copying means for copying a written image of the original document obtained based on the optical scanning onto a copy paper;
In the double-sided copying machine, the double-sided copying machine is equipped with a means for reversing the copied copy paper and supplying it to the copying means again. a second sensor that detects that the platen or the light source has moved by a predetermined amount;
a sensor, and based on the detection output of the first sensor, the platen or the light source is further moved in the optical scanning direction from the position detected by the second sensor to perform the optical scanning. A double-sided copying machine that is characterized by: