JPS59188664A - Control device for copying machine - Google Patents

Abstract

PURPOSE:To increase a speed of copying by developing an electrostatic latent image formed continuously on a photosensitive body by scanning an original, and thereafter, supplying continuously without gap of copy forms of numbers of necessary sheets to a transfer part, and transferring them. CONSTITUTION:A titled device is provided with a control part 4 for controlling a copying operation by inputting a command signal from a console 2 and a sensor signal of various sensors 3. This control part 4 is provided with an optical system control means 16 for scanning continuously one sheet of original by the number of times corresponding to the number of copy sheets by an original scanning optical system, or scanning continuously plural originals placed simultaneously on a platen, and an image forming means 20 for forming a toner image on an electrostatic latent image on a photosensitive body 17, based on a scanning optical image outputted by the original scanning optical system. Also, it is provided with a paper feed part control means 27 for supplying continuously without gap of copy forms 24 of the numbers of copy sheets or the copy forms 24 of the number of sheets corresponding to plural originals 14, to a transfer part 25.

Description

[Detailed Description of the Invention] [Technical Field] The present invention is applicable to copying a set number of sheets from one original, or when making multiple copies from multiple originals in one copy operation. The present invention relates to a control device for a copying machine that increases the speed of copying operations.

[Prior art]

As a control device for a copying machine, for example, the one shown in FIG.
The control unit 4 is composed of a microcomputer, for example, and has a CPU 5.
, OM 6, RAM 7, input interface 8,
an optical system drive circuit 16 that inputs a control signal from the control unit 4 and operates an optical system 15 that scans the original 14 with the lamp 10, mirrors 11, 12, lens 13, etc. An image forming section 1 which inputs a control signal from a control section 4 and causes a developing device 18 to form a toner image on a latent image formed on a photoreceptor 17 based on scanning of an original by an optical system 15.
An image forming section drive circuit 20 that operates the image forming section 9, and a paper feed section that inputs control signals from the control section 4 and supplies the copy paper 2'4 from the cassette 23 to the transfer section 25 using the paper feed roll 21, registration roll 22, etc. Paper feed unit drive circuit 2 that operates the unit 26
7.

In the above configuration, set the number of copies to "2",
When the copy operation is started, the control section 4 is operated to perform the copy operation based on the time chart shown in FIG. When the copy button on the console 2 is pressed (time t1), the photoconductor 17
starts rotating, and the first copy operation begins. The copy paper 24 is transferred to the registration roll 2 by the paper feed roll 21.
The paper is fed to position 2 (time 12 to t3).

The rung 10 of the optical system 15 lights up, and from the start position (
At time t3, the photoreceptor 17 is exposed to light (time 14 to t6). During the scanning of this optical system, that is, after the scanning start Ill (at time tS), the operation button of the registration roll 22 is pressed to copy paper (paper fed at time t2).
is supplied to the transfer unit 25, and after being transferred, a fixing operation is performed and the paper is transferred to a paper discharge port. After a predetermined scan (time t
6').

The paper returns to the starting position, but at this time, the second copying operation begins, the paper feed roll 21 operates again, and the copy paper 24 is fed to the position of the registration roll 22 (
Time t6~1? ). After the lamp 10 reaches the start position, scanning of the original begins (time t8), the same operations as described above are performed, and the copying operation for the second sheet ends (time t2).
1).

As described above, the control unit 4 controls the scanning of the original by the optical system 15, the image formation by the image forming unit 19, the supply of copy paper by the paper feed unit 26, etc. via the respective drive circuits 16 and 20. A desired set number of copies can be continuously obtained from a sheet of original.

However, in the conventional copying machine control device, from the previous copy operation to the next copy operation (copy operation from the n-th sheet to the (n+t)-th sheet, n=1.2°3,...) During the transfer, the copy paper fed to the transfer section is provided with an interval equal to the interval between the electrostatic latent images formed on the photoreceptor, which limits the reduction in copying operation speed.

[Object and structure of the invention]

The present invention has been made in consideration of the above, and firstly,
In order to increase the copy speed when making multiple copies from one original, the second is when making multiple copies corresponding to the number of originals from multiple originals placed on the platen at the same time. In order to increase the copying speed, the optical system scans the document continuously the number of times corresponding to the desired number of copies from one document, or scans multiple documents on the platen continuously. After the original is scanned by an optical system and the electrostatic latent images continuously formed on the photoreceptor are developed, the required number of copy sheets are continuously fed to the transfer unit without any gaps and transferred. The present invention provides a control device for a copying machine configured to perform the following functions.

[Embodiments of the invention]

Hereinafter, the copying machine control device of the present invention will be explained in detail.

FIG. 3 shows an embodiment of the invention, in which parts identical to those shown in FIG. 1 are designated by the same reference numerals.

The control unit 4 includes a microcomputer that inputs and processes command signals from the console 2 and sensor signals from various sensors 3. The output of the control unit 4 includes an original drum 28 that rotates the original 14 set so that the edges of the original 14 touch each other, and an optical system 15 that scans the original 14 using a lamp 10 (fixed), a mirror 11, etc. An image forming unit driving circuit 20 that operates an optical system driving circuit 16 and an image forming unit 19 that causes a developing device 18 to form a latent image formed on a photoreceptor 17 based on document scanning by the optical system 15 into a toner product. and paper feed roll 2
1. Copy paper 24 is removed from the cassette 23 by the registration roll 22, conveyance roll 29, registration foot 30, etc.
A paper feed unit drive circuit 27 that operates a paper feed unit 26 that supplies the paper to the transfer unit 25 is connected to each of the paper feed unit drive circuits 27 . The registration gate 30 has one end located near the registration roll 22, a finger member 32 rotatably provided around a support member 31 as a fulcrum, and the other end of the finger member 32 and an operating section connected to the paper feed section. energized by a signal from the drive circuit 27, or
a solenoid 33 which is deenergized 7, a guide 34 and a
The movement of the copy paper guided by the roller 5 and fed from the cassette 23 is controlled before the registration roll 22.

In the above configuration, when a copy operation is started, the control unit 4 is operated to perform the copy operation based on the time chart shown in FIG. When you press the copy button on console 2 (
At time t1), as the photoreceptor 17 begins to rotate, the lamp 1
0 lights up, and then the copy paper 24 is fed by the paper feed roll 21 (time t2 to t3). At this time, the solenoid 33 of the registration gate 30 is in a de-energized state, and the finger member 32 is in the state shown in FIG. 5(a). As a result, the registration gate 3o is closed, and the fed copy paper 24 comes into contact with the registration gate 30 and stops.

At time t3), when the document drum 28 starts rotating, the document 14
A latent image due to scanning is formed on the surface of the photoreceptor 17 during the rotation of the drum 28 (during exposure), that is, after the start of rotation T (time t4).
, the solenoid 33 is energized, the finger member 32 is in the state shown in FIG. As a result, the copy paper 24, which had stopped before the registration gate 300, is conveyed to the position of the registration roll 22 as shown in FIG. 25 starts (time t5).

Immediately after the start of this supply, the second sheet of copy paper 24' is fed by the paper feed roll 21 (times t6 to t7).

At this time, the previous copy paper 24 is being supplied to the transfer section 25, and on the other hand, the registration gate 30 is in the closed state, so the rear end of the copy paper 24 and the leading edge of the copy paper 24' are As shown in the figure (c), an overlap state occurs (time t7 to tg). When the rear end of the copy paper 24 separates from the finger member 32, the solenoid 33 of the registration gate 30 is energized, the registration gate 30 is opened, and the transport roll 29 is turned on, so that the copy paper 24
' is conveyed to the position of the registration roll 22 following the copy paper 24 (time t8 to t9), is supplied to the transfer section 25 by the registration roll 22 (time 19 to to), and
The copy sheet 24' completes the transfer, fixing, etc. and is transferred to the origami slot (both copy sheets 24.degree. 24' have no gap at the transfer section).

As mentioned above, when feeding the second sheet of copy paper 24', the control unit 4 controls the paper feed roll 21, resist register, etc. in synchronization with the continuous formation & movement of images on the photoreceptor surface. By sequentially controlling the operations of the roll 22, transport roll 29, registration game 30, etc., the second copy is ejected following the first copy (from the paper ejection port). (There is no pause in paper ejection). FIG. 7 shows a flow chart of the operations described above.

FIG. 7 shows another embodiment of the invention, in which parts identical to those shown in FIGS. 1 and 3 are designated by the same reference numerals.

In this embodiment, the originals 14 and 14' are successively placed on the platen in the moving direction of the lamp 10 of the optical system 15, so that the optical system 15 continuously scans the two originals. .

In the above configuration, the latent images of the originals 14 and 14' are continuously formed on the surface of the photoreceptor 170 without any gaps, similar to the embodiment shown in FIG. Then, a paper feed roll 21, a registration roll 22, a conveyance roll 29, a registration gate 3
0 etc. are operated in synchronization with the movement of the latent image formed on the surface of the photoreceptor 17, and the second copy is ejected following the first copy.

Similarly, in the present invention, the means for continuously forming a latent image of an original on the surface of a photoreceptor without any gaps is not limited to the means shown in each of the above embodiments. It is also possible to set several originals continuously on a belt and rotate the original drum the same number of times as the predetermined number of copies, or to set a plurality of originals continuously on a belt without any gaps and rotate the original drum the same number of times as the predetermined number of copies. may be made to run on the platen.

Further, in the present invention, the means for continuously supplying a predetermined number of copy sheets to the transfer section without any gaps is not limited to the means shown in the above embodiments, but in particular 1.
The resist gate may be constructed using a spring, a force l1, an electromagnet, or the like.

Furthermore, the definition of "continuously without gaps" in the present invention describes a state in which a plurality of originals, latent images, copy sheets, etc. are arranged with short gaps in the moving direction or in contact with each other. .

〔Effect of the invention〕

As explained above, according to the present invention, the optical system continuously scans the original a number of times corresponding to the desired number of copies from one original, or continuously scans multiple originals on the platen. After scanning the original with an optical system and developing the electrostatic latent images continuously formed on the photoreceptor by scanning the original, the required number of copy sheets are continuously fed to the transfer section without any gaps. The copying speed can be increased to 100%.

[Brief explanation of the drawing]

FIG. 1 shows a conventional copying machine control device. FIG. 2 is a time chart showing the operation of a conventional device. FIG. 3 is a diagram showing an embodiment of the present invention. 4 to 6 are time charts, state diagrams, and flow charts showing operations in one embodiment of the present invention. FIG. 7 is a diagram showing another embodiment of the present invention. Explanation of symbols 2...Console, 3...Various sensors, 4
...Control unit, 5...CPU, 6...R
OM, 7...RAM. 8...Input ink face, 9...°Output interface 7 ace, 10...Lamp, 11.12...
・Mirror, 13... Lens, 14, 14'... Original, 15... Optical system, 16... Optical system drive circuit, 17... Photoreceptor, 18... Developer,
19... Image forming unit, 20... Image forming unit drive circuit, 21... Paper feed roll, 22... Registration roll, 23... Cassette, 24.24'... Copy paper, 25 ...Transfer section, 26...Paper feeding section,
27...Paper feed unit drive circuit, 28...Document drum,
29... Conveyance roll, 30... Registration gate,
31... Support member, 32... Finger member,
33...Solenoid, 34.35...Guide. Patent Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Shin Matsuhara 2nd Agent Patent Attorney Ki Mura
Seiji, Patent Attorney, Taira 1) Tadao, Patent Attorney, Atsushi Ueshima - Agent, Patent Attorney, Suzu
Hitoshi Ki Figure 1 Figure 2 Figure 3 Figure 4 Star 5 Figure C) (Rono (ha)

Claims (1)

[Scope of Claims] A copying machine equipped with a control unit that controls a copying operation by inputting command signals from a console and sensor signals from various sensors, wherein the control unit inputs a single document into a document scanning optical system. an optical system control means that continuously scans a number of times corresponding to the number of copies, or continuously scans a plurality of originals placed on a platen at the same time; and a photoreceptor based on a scanning light image output by the original scanning optical system. an image forming unit control means for forming a toner development on the upper electrostatic latent image; and an image forming unit control means for forming a toner development on the upper electrostatic latent image, and continuously transferring the number of copy sheets corresponding to the number of copies or the number of sheets of copy paper corresponding to the plurality of originals to the transfer unit without a gap. 1. A control device for a copying machine, comprising a control means for controlling a paper feeding section.