JPS6011858A - Electrophotographic copying machine - Google Patents

Abstract

PURPOSE:To execute efficiently a copying by providing two exposing systems and two paper discharge parts, inhibiting an operation of the other exposing system when one exposing system is operating, and switching to one corresponding paper discharge part and executing a discharge. CONSTITUTION:When an original 18 is placed on a platen glass 2a and a copying start switch 31a of an operation panel 30 of the left side is depressed, a left side shutter solenoid 26a operates, a shutter 25a is opened, and image of the original 18 is exposed on a photosensitive body 4 by an operation of a left side exposing system 20a, projected onto the photosensitive body 4, a toner image is transferred onto a form 19, and thereafter, it is fixed by a fixing device 14, and fed to a lower stage tray 17a. After the left side copying is started, even if a right side copying start switch 31b is depressed, a detecting relay 32b does not operate since a contact 32a' of a detecting relay (b) of an electric power source circuit of a right side copying start relay 32b is opened, therefore, a right side exposing optical system 20b does not operate. In the same way, the left side copying is not executed when the copying of the right side is being executed. The copying efficiency is improved by operating alternately and successively both the copying systems.

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD The present invention relates to an electrophotographic copying machine that can efficiently perform copying. Prior Art In conventional electrophotographic copying machines, in order to improve the copying efficiency, one time σ] recursion U As a result, a high-speed electrophotographic copying machine appeared, but in actual copying work, originals had to be changed manually by opening and closing the platenno J bar, or with the C-1 automatic document processing device. Since the time required to exchange originals is longer than the copying cycle time of the copying machine, even if the copying machine is made faster, the total copying time including the processing time for one original will be shortened. OBJECT OF THE INVENTION The present invention relates to an improvement of an electrophotographic copying machine that overcomes the above-mentioned difficulties. Providing an electrophotographic copying machine that can be used

[This is it. Embodiment of the Invention The present invention has n1 sets each of a charging system, an exposure area, a developing system, a paper feeding system, a transfer/separation system, and a cleaning system arranged around a single photoreceptor, and a transfer system of 1". In an electrophotographic copying machine in which a fixing system for fixing a developer image has been replaced, one of two sets of exposure systems for forming an original image on the exposure area of the photoreceptor σ] and one of two sets of paper ejection sections is used. A paper ejection system that selectively switches and discharges copies onto one side, and a 2t exposure system that prohibits the operation of the other exposure system while one of the two exposure systems is in operation, and supports the exposure system that is in operation. The present invention is characterized in that it is equipped with a control system and a device for selectively discharging copies from the paper discharging section.Example The first embodiment shown in FIG. 1 and FIG. 3 will be described below. 1 is a slit exposure type dry type electrophotographic copying machine;
Platen glass 2α, 2h is installed on both left and right sides of the top of '2.
A platen blade 3 (Z% 3h) is provided above the platen glass 2a% 2b so that it can be opened and closed 11. In addition, in the center of the copying machine 1, a drum-shaped ``yc'' wood 4 is located above the platen glass 2a%2b. Rotation drive in clockwise direction by 2t drive motor E
A charging corotron 5, mft,
A region 6, a developing device 7, a transfer corotron 8, a φ) corotron 9, and static eliminating corotrons 1° and 0:1 are provided. Zaraniko 11. Above these, there is a two-layer exposure optical system 20Q.
, −. 20b are arranged on the left and right, and the same exposure optical system 20a is arranged on the left and right.
120b is an exposure lamp 21.b that emits fJp from the lower surface of the document J8σ] on the platen glass 2. (L, 2],
b, and irradiation 2 with sun and dew temperature lamp 21a121b.
The mirrors 22 (L, 22h, lenses 23a, S23b, and lenses 23a and 23b) successively reflect the light that is diffusely reflected 2t on the lower surface of the original 18, and direct the light to the exposure area 6 of the drum-shaped photoreceptor 4 below.
a prism 24 that guides the
Two shutters 25 (Z % 25 h and shutter 2
5a%25h! It consists of a shutter lens 74 door 26a, which is driven to open and close, and a slit 27 arranged on two sides of the 1-nosm, and a shifter 25a is formed by the shutter lens maids 26α and 26h. By moving the exposure optical systems 20a and 20h on the open side to the right,
The knot images of the original 8 are successively projected onto the drum-like sensing element 4. On the right side of the developing device 7 is the f+8 paper tray 12a11.
2b are arranged in two stages, upper and lower, and the same paper feed tray 12
A, 1 sheet of paper I9 stored in 12/+ is sent to the drum-shaped photoreceptor 4 by the paper feeder @ 13, and after being transferred, it is sent to the fixing device 14. It has become established. Moreover, N red optical system 20. z, 20A is exposed by one side gj'L, and the copy fixed by fixing device 1/l is σ] Tray 17as+, 7A corresponding to the exposure source is switched to one side by the switch finger. 15 [It is designed to be switched and sent from here. In addition, the switching finger 15 is provided with a paper ejection switching solenoid 4°1.
The movable piece G is connected to each other, and when the paper discharge switching solenoid I'16 is not operating, the switching finger 15 is
By swinging the key to one side, the copy is sent to the lower tray 17CL.
The switching finger 15 is swung downward so that the copy is sent to the upper tray 1.7b. Two operation panels 30 (t
. , 30h is installed 22”L, same operation panel 30 (1% 30
In addition to the copy number setting means, paper feed tray selection means, and copying magnification setting means (not shown), 1. :The copy start switches 31α, 3]b straddle the two positions. Finally, the control circuit for the shutter solenoid 200% 26 /' and the paper discharge switching solenoid 16 will be explained with reference to FIG. Left side copy detection relay 32 (L power supply circuit, G copy start switch 31 cl and right side copy detection relay B contact 32
b and the copy completion detection switch 33 (Z is connected in series with the interposed J 2t. The same copy start switch 3), (6 contacts 32 for self-holding in parallel with l (L is disconnected, the right copy detection relay 32 The power supply circuit h is similarly formed, and the relay contacts of the copy detection relays 32α and 32b are interposed in the copying machine control circuit (not shown), and when the left copy start switch 31α is closed, the left Copy detection relay 32α
operates and maintains itself, the right copy detection relay 32b does not operate, only the left exposure optical system 20 (l) operates, and the right exposure optical system 20 h does not operate, and the left exposure optical system 20 (When the exposure of L is completed, the left side copy detection relay 32α returns to non-operation and hangs, and the right side copy detection relay 32b also operates in the same way and becomes suspended. Copy 2 to the power supply circuits of the nodes 26α and 26b, respectively.Detection relay 32α) Each relay α of 32b
Contacts 32α" and 32h# are interposed, so that when the copy detection relays 32α and 32b operate, the shutter solenoid 26 (L, 26h) can also operate correspondingly to 1t. Thirdly, a timer. 34 power supply circuit with right side copy detection relay 3
2h's relay α contact 32h'' is interposed in the power supply circuit of the n1 sheet discharge switching solenoid 16, and the timer is activated for a limited time, and the a contact 34 for timed return is interrupted, and when the right side copy detection relay 32h is activated, After a predetermined time delay of 2t, the paper ejection switching solenoid 16 is operated to start copying on the right side.Since the embodiment shown in Figs. 1 to 3 is constructed as described above, the platen force on the left side is ) (Open -3α, place original I8 on the platen glass 2a, and place original I8 on the same platen glass.) After closing -3α, press the copy start switch 31C1 on the left operation panel (9), and the left shirt Turn Lenoid 26α operates and \Left (111) Shutter 5
α is the opening position of the opening gear 1 left side exposure optical system 20 (with the operation of L, the document 18'7 is placed on the drum-shaped photoreceptor 4) The image is exposed in a slit shape and is continuously projected onto the drum-shaped photoreceptor 4. '1, After the toner image of the original 18 is transferred to the paper 19,
The image is fixed by the fixing device 14 and sent to the lower tray 17d. Even if the right side copy start switch 31b is pressed during this left side copying, the left side copying detection relay b contact 32α' in the power supply circuit of the right side copying detection + rule 32b is open and OFF, so the same right side copying is not performed. Detection relay 32/+ 7)s does not operate, and the right exposure optical system 20h &1'' does not operate.
No right side copying is performed. Conversely, even if the left side copy start switch 31α is pressed while the right side is being copied, the left side copy will not be performed.
do not have. In this way, by alternately setting documents on the other platen glass 2 while one exposure optical system 20 is operating, the copying machine 1 can make copies one after another without a pause. By doing so, copying efficiency can be greatly improved. In the embodiment shown in FIGS. 1 to 3, until the operation of one exposure optical system 20 is completed, the exposure optical system 20 of the other
However, when continuously copying two originals, when one exposure optical system 20 finishes scanning and enters return, the other exposure optical system 20 starts scanning. . If the exposure optical system cumulative σ] scan of one side is started when the exposure optical system σ〕 scan of the other side is completed, the drum-shaped photoreceptor 4 can be temporarily stopped while the exposure optical system returns. It can continue to rotate without any lag, and copying operations can be made much faster. Next, a second embodiment illustrated in FIGS. 4 to 6, in which the present invention is applied to full-surface exposure type copying, will be described. Reference numeral 40 denotes the main body of a full-surface exposure type dry type electrophotographic copying machine, and two sets of document handling bags @60 are arranged on the left and right sides (II) with the central copying machine main tree 40 in between. Openings 42 are formed on both sides of the casing old (1), and an opening 62 is also formed on the inner side of the casing 61 of the original handling device 60. Teshi A
Ru. Inside the copying machine main body casing 41, three σ] rolls 44, 45, 46 are pivotally supported.
．． 46, an endless belt-like photoreceptor 47 is stretched over 22t,
A charging corotron 49 is disposed opposite to the endless belt-shaped photoreceptor 47c so that the motor 48 connected to the roll 44 feeds the endless belt-like photoreceptor 47c counterclockwise in FIG.
An endless belt-shaped photoreceptor l is placed between the roll 46 and the roll 44.
A transfer roller 51 is disposed opposite to the endless belt-like photoreceptor 47 above 44, and a vacuum transport device 52 is disposed to the left of this. A static eliminating corotron 53 and a cleaning device 54 are disposed in contact with the endless belt-like photoreceptor 47 in a coaxial pneumatic transport device 52. A paper feed device 55 and a paper feed device 54 are arranged on the right side of the transfer roll 51. A paper tray 56 is arranged, and the paper 57 in the tray 56 is separated.
Either one of them is fed between an endless belt-like photosensitive member 47 and a transfer roll 51 by a paper feeding device 55. Roughly speaking, a paper discharge device 58 is disposed 2t ahead of the vacuum transport device 52. In addition, in the document handling device 60, a platen glass 63 is installed above the gauging 61, and an automatic document processing device 64 is disposed above the platen glass 63, and the document 65 is automatically processed by the processing device 64. The document 65 is automatically fed onto the platen glass 63 and the exposed original 65 is automatically discharged. A flash lamp 66 is disposed, and a mirror 67 inclined at 45 degrees toward the copying machine body 40 is disposed below it, and a lens 68 that is moved in the optical axis direction by a variable magnification motor 70 is disposed in the cylindrical body 43. A mirror 69 is installed in the middle of the openings 42 on both sides of the copying machine main body casing 41, and the mirror 69 is 2 ft in diameter as shown in the figure.
The free drive groove allows for vertical swinging around a vertical axis. The embodiments shown in FIGS. 4 to 6 also have a control system that is almost the same as the embodiment shown in FIG. 1 and FIG. Exposure by the other document handling device 60 cannot be carried out until the copying machine main body 4001 copy uJ operation is completed by the exposure by 0. The example is 1171 and π
The configuration key is σ], and when either one σ) the original 65 is placed on the platen glass 63 of the original handling device 60,
When the command to start copying is issued, the original handling device (No.
After reflection on mirror 67.69, roll 45.
4 (belt-like feeling between 5 and original wood part 47 (full exposure to L)
〇The rotation of the telt motor 48 causes the exposure to change every 1t [5
When the developing device 50 exposes E'1, the portion of the endless belt-shaped photosensitive wood 47 that has been cleaned E1% moves to the exposure area E' while being charged by the charging corotron 49.
After 1tS and the mirror 69 has been rotated by 90°, the exposure by the document handling device 60 is carried out. During that time, the automatic document processing device 6 on the side where the exposure has been completed
- 1 operates and the original 65 is replaced. In the embodiments shown in FIGS. 4 to 6 as well, the document handling device 60 on the side where the exposure has been completed handles the document 65.
While the exchange is taking place for 1 t, the other document handling device 60
Since exposure is being performed on the original 65 that has been set at 1", the time required for copying can be greatly shortened. Particularly with full-exposure type copying machines, exposure is completed in an instant, so the original The copying cycle time is limited depending on the time required for processing, but the pair of left and right document handling devices 6o can process the document alternately, which can cut the document processing time in half, dramatically increasing copying efficiency. In the embodiment described above, the control system is composed of a relay circuit, and the control system may also be composed of a microcomputer. Effects of the Invention In the present invention, around one photosensitive tree σ],... f'! Electrical system, exposure area, developing device, paper feeding system, transfer/separation thread, and cleaning system are all installed in one set, and the transfer 22' is also equipped with a fixing system for fixing the developer image. In an electrophotographic copying machine, the exposure area of the first photoreceptor [this second area where the original image is formed]
one set of exposure systems, two sets of exposure systems, one of the two sets of exposure systems, one of the two sets of exposure systems, and one of the two sets of exposure systems, a paper system in which one of the paper ejecting units selectively switches the copy to one side and ejects it. Since it is equipped with a control system that prohibits the operation of the other exposure system during operation and σ] corresponds to the exposure system and switches and discharges the copies, it is possible to By operating the systems alternately and having the exposure system [this document σ] processed while it is inactive, the cycle time of the entire copier σ] can be significantly shortened and the copying efficiency can be greatly increased.
It is possible to improve on lr.

[Brief explanation of the drawing]

Fig. 1 is a front view illustrating an embodiment of the electrophotographic copying machine according to the present invention, Fig. 2 is an enlarged front view of its clasp, Fig. 3 is its circuit diagram, and Fig. 4 is another example of the unexploded 111J. Embodiment σ] A side view of the main part, FIG. 5 is a plan view thereof, and FIG. 6 is a front view thereof. ■...Slit exposure type dry type electrophotographic copying machine S2...
Platen glass, 3... Platen cover, 4... Drum-shaped sensitive element, 5... Charging corotron, 6... Exposure area, 7... Developer, 8... Transfer corotron, 9...
... Peeling corotron, 10... Static elimination corotron, 11
... Cleaning device, 12 ... Paper feed tray, 13
...Paper feeder, 14...Fuser, 15...Switching finger, 16...Paper output switching switch 117°/1% 18...Original, 19...Paper, processing ...Exposure element system, 21...Exposure rung, 22...Mirror,
A...Lens, A...Prism, 5...Shutter, A...Shutter maid, 27...Slit, ■...Operation panel, 31...Copy start switch, 3
2... Copy detection + J camera 33... Copy completion detection switch, 34... Timer 1 40... Full exposure type dry electrophotographic close-up machine body 141.
...Copier main body casing, 42...opening, 43...
・Cylindrical body, 44.45.46...roll, 47...
Endless belt-like feeling -yt, body, 48...% -ta, 4.
9... Charged corotron, mark... developer, 51...
Transfer roll, 52... Vacuum transport device, 53... Static elimination corotron, 54... Cleaning device, 55...
Paper feeding device, 56... Paper feeding tray, 57... Paper, 60... Original handling device, 61... Handling device casing, 62... Opening, 63... Platen glass, 6.
1... Automatic manuscript processing ■ (iM position, 6s... Original, 66
・・・Fragile lamp, 67... Mi':' s 6
8...Lens, 69...Mirror, 70...Motor. Agent: Patent attorney Nozomi Ehara (1 person)

Claims (1)

[Claims] Around one photoreceptor, there are one charging system, one exposure area developing system, paper feeding system, transfer/peeling system, and cleaning system.
In an electrophotographic copying machine equipped with a fixing system for fixing a developer image transferred to the photoreceptor σ] two sets of exposure systems for forming an original image on the exposure area of the photoconductor σ]; paper ejection section σ] A paper ejection system that selectively switches and ejects copies to one of the two sets of exposure systems, and a paper ejection system that prohibits the operation of the other exposure system while one of the two sets of exposure systems is operating. An electrophotographic copying machine comprising: a control system for selectively discharging a copy to a paper discharging section corresponding to an exposure system therein.