JPS59163A - Electrophotographic copying device - Google Patents

Abstract

PURPOSE:To perform double copying of an excellent operability with a copying device having original placing faces of two sides, by making an arrangement that copying paper is not discharged outside the device even after copying of the surface is completed, but fed to the copying section again for copying on the rear side, and after the copying on the rear side is completed, the copying paper is discharged to the outside. CONSTITUTION:The image of an original on an original placing plate 20 is exposed and an electrostatic latent image is formed on a photoreceptor 11 and the image is developed by a developing device 14, the visual image is transferred on transfer paper 32 fed between a transfer roll 25 and the photoreceptor 11. After the transferring the transfer paper 32 is discharged to the outside of the device after fixing by a fixation device 45, but, in the case of double copying, the copying paper 32 is inverted and fed between the photoreceptor 11 and another transfer roll 30 and another image on the photoreceptor 11 is copied on the rear side of the copying paper 32. Therefore, images of the 1st surface B and 2nd surface C on the original placing plate 20 are copied on both sides of the transfer paper 32. The paper is discharged after the double copying is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrophotographic copying apparatus having two document placement surfaces.

(Regarding, electrophotographic copying devices that copy only one side of the copy paper are used, and a model that automatically copies both sides of the transfer paper has been proposed1, but this is not possible with various technologies. Due to the above problems, it has not yet been put into practical use.In an electrophotographic copying device that can automatically copy on both sides of transfer paper, it is desirable that copies be made in the same size on both sides of the transfer paper, and this is especially true for books. It is effective when opening and copying both sides, and it is also desirable to be able to copy only one side of the second grade.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide an electrophotographic copying apparatus that has two document placement surfaces and is extremely effective and convenient to operate on both sides.

The present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 to 4, the photoreceptor 11 is formed in the shape of a tram, and around it is a charging device 12, an exposure device 13, an imager device 14, a transfer device 15, a separation device 16, and a transfer device. 17. The separating device 18 and the cleaning device 19 are sequentially arranged in the rotational direction. As shown in FIG.
The object to be photographed, that is, the iron of the original R, is placed on the photoreceptor 11 and sequentially exposed with 1.
While moving the scanning system consisting of the lamp 21 and the movable optical system, the document table 20 is moved within a length range from the reference line 1) to the setting line E by the size setting piece 22 with a predetermined width.
The images of the originals above are exposed one after another. Base/Bruce Line D” is good for the second one.

Switch SW9.5WII is arranged and switch 5W1
0.5W12 is compounded on the setting line E'2'Zais setting piece 2
It is arranged integrally with 2. The document table 20 usually has a reference line A,
■] are in the corresponding steady position shown in the figure, and the switches SW9 and
An actuating piece 23 for actuating the SW 10 is integrally fixed in correspondence with the base ω line A. Switch 5Wit, 5w
An actuating piece 24 for actuating the lamp 21 is integrally fixed to the scanning system such as the lamp 21, and this actuating piece 24 is normally located on the reference line. The roller 15 is constructed using a roller γj' 25, and the two rollers 25 can be rotated in the opposite direction at the same circumferential speed as the photoreceptor 11.

The roller 25 is pivotally connected to one end of a lever 26, the lever 26 is pivotally supported in the center, and the other end is connected to the driving shaft of the solenoid 5OL20 via a spring 27, and is connected between the fixed part frame and the other end. Several return springs 28 are removed. When the solenoid 5OL2 is not operating, the transfer roller 25 is rotated by the return spring 28 to a position where the lever 26 touches the stopper 29 and is separated from the photoreceptor 11, and when the solenoid 5OL2 is operating, the transfer roller 25 is moved away from the photoreceptor 11.
L2 causes the lever 26 to rotate against the spring 28 and come into pressure contact with the photoreceptor 11. The transfer device 17 is also the transfer device t15.
The transfer roller 30 is configured using a transfer roller 30 similarly to the above, and when the solenoid 5OL1 is activated, the transfer roller 30
It is designed to be pressed against. Alternatively, a charger may be used instead of the transfer roller to perform two transfers. A transfer paper 32 is fed between the transfer roller 25 and the photoreceptor 11 from a paper feeder 31, and this paper feeder 31 is connected to a pair of rollers 3.
3 and 34. This roller 33 is driven to rotate at a predetermined speed, and a roller 34 is pivotally connected to one end of a lever 35. The lever 35 is pivoted at the center, and the other end is connected to the operating shaft of the solenoid 5OL4 via a spring 36, and a spring 37 is attached between it and the stationary part (A).

When the solenoid 5OL4 is not operating, the lever 35 is stopped by the return spring 37.

It rotates to a position where it hits the bar 38 and separates from the roller 33, and when solenoid S (M, 4 is activated, solenoid 5
QL4 rotates the lever 35 against the spring 37 and brings it into direct contact with the mouth 33. The rolling paper 32 is fed one by one between the rollers 33 and 34 from the paper feed tray, and when the roller 34 comes into pressure contact with the roller 33, the rollers 33 and 34
1. Insert the photoreceptor between the photoreceptor 11 and the roller 25. Ru. The public warehouse 1 device 16 uses a separation claw,
The transfer paper separated from the photosensitive holiday by this separation claw is placed on the guide plate 3.
The endless belt 42 is guided by the guide piece 41 at 9°40.
It is sent to IΔ. Endless bell 1-42 has rollers 43, 4
4, and is rotated forward or reverse by the operation of clutches CL2 and CL3. A fixing device 45 is arranged on the endless belt 42, and this complete attachment; 6
45, two sets of rollers conveyed by the endless belt 42 are fixed. The transfer paper is fixed by the fixing device 45) and then swung along the path conveyed by the forward rotation of the endless belt 42.

There is a SW6, and furthermore, an IL is always provided outside the roller 44.
There is a pair of rollers 57 and 58 that are rotating, and a switch SW7 is disposed outside the rollers, and this switch 8W6°SW
Switch 7 is activated for single-sided copying, and only switch SW6 is activated for double-sided copying. When the endless belt 42 is reversed, the transfer paper is moved by the guide J441 to the brim [ψ? Ai belt 4
You will be guided to 6. The endless belt 46 is passed around the rollers 47 and 48, and when the clutch CL3 is in operation, it reverses and transports the rolling paper guided by the guide piece 4 to the photoreceptor 11 and the transfer roller 30. Send it in between.

A switch SW5 is arranged on the path along which the paper is conveyed by the endless belt 46, and this switch SW5 is activated by the paper being rolled. The separating device 18 uses a separating claw [one claw], and the transfer paper separated by this separating claw is transferred to the guide plate 4.
The paper is guided at 9°50 and conveyed to the paper slot 411 by the endless belt 51. Martyr φ1; Yoruto 51 is roller 52, 5
3, and the fixing device 54 is arranged on the - side thereof. A switch SW is provided between the fixing device 54 and the paper ejection port.
8 is arranged, and this switch sw8 is operated by the transfer paper. Further, a cam 55 is connected to the photoreceptor 11 via a clutch CL1 and a gear mechanism 56, and switches SW1 to SW4 are arranged around the cam 55.

Now, if we connect terminals Bl, , and B2 to the AC power source and close the main switch MS, the output of the AC power source will be high if ft. - voltage is applied between terminals B3 and 84 via the fuse F, and the fixing devices Kt, 45, 54 and motors M and l are supplied with power, and are in the operating state.
When the image device 14 and the IJ device 9 enter the operating state, the photoreceptor 11 is driven %ζ.L1 Timer T
I will be paid 7L.

When the 11-sided printed switch S SW is closed in this state, the relay RA2 is activated and closes its normally open contact RA2-al to maintain its self-holding state, and the normally open contact RA2-B2゜T
tA2-B3 is closed and normally closed i! , RA2-b1~R
Open A2-b3. Relay RAI is normally open contact RA2
- Normally open contact RAI which is activated by closing B2 -al
Close and close. Opening of this normally open contact RAI-;12 activates relay RA4, and its normally open contact RA4-
Al is closed and self-maintained, and the normally open contact nA4~
a2. Close RA4-B3. This normally open contact R
, A4-B3 closes solenoid 5QL2, 5
When OL3 is activated, the roller 25 is brought into pressure contact with the photoreceptor 11, and the separating claw 16 is brought into contact with the photoreceptor 11. Also, the clutch CL2 is closed by the closing of the normally open contact RAI -; +4. The charging device 12 is actuated to cause the endless belt 42 to rotate normally, and the charging device 12 is supplied with power output by the closing of the normally open contact RAI-B5, and is activated to charge the photoreceptor 11.The clutch CLI is actuated by the closing of the normally open contact RAI-B3. The switch SWI is actuated by the rotation of the cam 55.
When 5 rotates from its normal position, it closes. Thereafter, when switch SW2 is closed by cam 55, relay RA6
operates and closes its normally open contact RA6-al for self-holding, and the normally open contacts RA6-a2 and RA6-B
3 and open the normally closed contact RA6-b. When the normally open contact RA6-a2 is closed, the lamp 21 lights up, and when the normally open contact RA6-a3 is closed, the remoter M:3 rotates in the normal direction, and the lamp 21 and the optical system move in the direction of the arrow shown in the figure. The image of the original on the first stage B of the original table 2o is exposed to light on the photoreceptor 12, and an electrostatic latent image thereof is formed. This electrostatic latent image is developed with toner by a developing device 14. When the lamp 21 and the optical system start, the actuator 24 starts at the same time.
Switch 5WII closes. The rung 21 and the optical system move and the +7. : When the image of the original is exposed to the setting line E by the Twiss setting piece 22, the switch 5WL2 is actuated by the actuating piece 24, and the relay RA6 is reset. Therefore, when rung 21 disappears, motor M3 reverses and rung 2
(2) The optical system returns and the switch SW 12 returns to its original state. In the case of '/i:', the first B and the second
Switch 5W13 when copying originals on side C alternately.
is closed. Therefore, when switch 5W13 is closed, when switch 5W12 is activated, relay TjA7 is activated.
operates and closes the normally open contact RA7-al to maintain self-holding, and also closes the normally open contact RA7-B2 and becomes the normally closed contact R.
A7-1) is opened. By closing this normally open contact RA7-B2, the document table 2o is driven by the motor M4 in the direction of the arrow shown in the figure. When the document table 2o moves, the actuating piece 23 simultaneously moves.
moves and switch SW9 closes. When the document table 20 moves and its reference line A reaches the setting line E defined by the duplex size setting) A22, the actuating piece 23 activates the switch SWI.
O is activated, motor M4 is stopped, and document table 20 is stopped. When the rung 24 and the optical system come to their normal positions, the actuating piece 24 opens the switch 5WII and the motor M
3 stops and the lamp 21 and optical system stop. Thereafter, when the switch SW3 is closed by the cam 55, the solenoid 5OL4 is activated and the transfer paper 32 is fed between the roller 25 and the photoreceptor 1, and the toner is transferred from the photoreceptor 11 to the paper 32. is translated 'I4'. The transfer paper is separated from the photoreceptor 11 by the separating claw 16, guided by the guide plates 39 and 40, and guided by the endless belt 4 by the guide piece 41.
2, the toner is conveyed by an endless belt 42, and during the conveyance, the toner is fixed by a fixing device +1t45. When the switch SW6 is activated after this transfer paper is fixed by the fixing device 45, the relay RAI is reset and the charging device 12 is deactivated, and the relay RA3 is activated to close its normally open contact 3-al. It closes and holds itself, and also closes the '1 open contact RA3-a2 and starts the timer T.
Normally closed contact RA3-111, RA3-1
) 2 is released.

By opening this normally closed contact RA3-'l)2, the solenoids 5oL2, S01, 3 are restored and the transfer o-la 25
Then, the separation claw 16 separates from the photoreceptor 11. Fixing device 45
The rolled paper that has been fixed is further conveyed and ejected to the paper output tray, but in the middle of the process, switch SW7 is actuated, relays 11A2 and RA4 do not turn on, and the timer T shuts off the power supply. , the electrical system is released. Therefore, the transfer paper is double printed on the back side.1. The chair will be ejected, and the complex will be ejected.
By moving the IJ chair setting piece 22, it is possible to make a change. When the switch 5W13 is closed, the switch s is closed before the set time of about 20 seconds has elapsed after the timer TI was turned off by the switch SW7.
When SW is closed and exposure is performed in the next copying operation, the 21st rnc original on the original platen 2o is similarly copied. When timer T1 turns on and its normally open contact TI-a returns, relay RA7 returns, motor M4 reverses, and document table 20 returns to its original position.
When the base returns to its normal position, the switch SW 9 is opened by the operating piece 23, the motor M4 is stopped, and the base 1 and the high ground 2o are stopped 1.

Therefore, when the switch 5W13 is closed, the originals on the document table 2 (the first B and the second C of the second month) will be copied on one side alternately.If the switch 5W13 is not closed, Sometimes, only the first document B1 on the document table 2o is copied.

Furthermore, when the double-sided printed switch DSW is closed with the main switch MS closed, the relay RA 1 is activated, and its normally open contact RAI-al is closed to hold itself, and the normally open contacts RA2-a2 to RA2- Close a5. By closing this normally open contact RAI-a2, relay R
A4 operates and closes its normally open contact RA4-a1 to maintain its self-holding state, and the normally open contacts RA4-a2 and RA
4-a3 is closed. And this normally open contact RA4-a:
3 is closed, the solenoids 5OL2 and 5OL3 are activated, and the roller 4' is brought into pressure contact with the photoreceptor 11, and the separating claw 16 is brought into contact with the photoreceptor 11. Furthermore, the clutch CL2 is activated by the closing of the normally open contact RAI-a4, and the force is increased! l: Rotate the end belt 42 in the normal direction. Also, normally open contact RAI
-A5 is closed, the contact device 12 is activated by the power output and charges the photoreceptor 11, causing the normally open contact R to close.
When AI-a:3 is closed and connected, the clutch CLI is activated and the cam 55 is rotationally driven. From switch 5w11 55
is in the steady position and closes when rotated. After that, when switch SW2 is closed by cam 55, relay RA
6 operates and closes its normally open contact RA6'-al for self-holding, and the normally open contacts RA6-a2, R
A. Close 6-a3 and open normally open contact RA6-1).
No. By closing the normally open contact RA6-a2, the rung 21 lights up, and by closing the normally open contact 1ζA6-a3, the motor M3 rotates in the normal direction, the lamp 21 and the optical system move, and the first position on the document table 2o is turned on. 3. The image of the original on photoconductor 1
1 to form an electrostatic latent image. This electrostatic latent image is hidden by toner by the developing device 14. When rung 21 and optical system start, work 1 11 piece 2
4 starts at the same time, 5w11 closes. When the lamp 21 and the optical system move to expose the image of the document up to the setting line E formed by the size setting piece 22, the actuating piece 2
4, switch 5W12 is activated and relay RA6 is reset. Therefore, when the lamp 21 goes out, the motor M
3 is reversed and the lamp 21 and optical system return to switch 5W.
12 returns. When the rung 21 and the optical system come to their normal positions, the operating piece 24 opens the switch 5W11, stopping the motor M3 and stopping the lamp 21 and the optical system.
do. Also, when switch 5W12 is activated by actuation J124, relay Rλ7 is activated, and the normally open contact RA7 is activated.
- self-holding by closing al and normally open contact RA7
-a2 is closed and normally closed contact RA7-1) is opened. By closing this normally open contact RA7-a2, the document table 20 is driven in the direction of the arrow shown in the figure by the motor M4.

At the same time as the document table 20 moves, the actuating piece 23 moves and the switch SW9 closes. When the document table 20 moves and its reference line A reaches the setting line E formed by the copy size setting piece 22, the switch 5WIO is actuated by the actuating piece 23, and the motor M is activated.
4 stops, and the document table 20 stops.

Thereafter, when the switch SW3 is activated by the cam 55, the solenoid 5OL4 is activated and the transfer paper 32 is transferred to the transfer roller 2.
The toner is fed between the photoreceptor 5 and the photoreceptor 11, and the toner is transferred from the photoreceptor 11 onto the transfer paper 32. The paper is separated from the photoreceptor 11 by the separating claw 16, guided by the guide plates 39 and 40, and sent to the endless belt 42 by the guide piece 41, and is conveyed by the endless belt 42. During the conveyance, the fixing device
5, the toner is fixed. When the transfer paper activates the switch SW6, the relay RAI is reset, the charging device 12 is reset, the clutches CI and 2 are reset, and the endless belt 4 is reset.
2 stops. In addition, relay R is activated by the operation of switch SW6.
A3 operates and closes its normally open contact RA3-al to self-hold. Closes the co-inclined normally open contact RA3-a2 to supply power to the timer T and normally closed contact RA3'-1)1,
Unlock MyoA3-ty+2. Normally closed contact RA3 with
-132 opens solenoid 5QL2.

3OL3 returns and the transfer roller 25 and separation claw 16 are separated from the photoreceptor J1. The cam 55 passes through the switch sw4 and continues to rotate. When the set time elapses after the timer T is supplied with power, it operates and its normally open contacts T-a1 to T-35 are activated.
is closed and the normally open contact T~1) is opened.

By closing this normally open contact T-a2, solenoid 5OLI
is activated, the transfer roller 3o is brought into pressure contact with the photoreceptor 11, and the normally open contact 'r-a3 is closed, so that the clutch CLI continues to operate and the cam 55 continues to rotate. Also, normally open contact T-a
4 is closed, the clutch CL3 is activated and the endless belt 4 is closed.
2.46 is reversed, the transfer paper is conveyed by the endless belt 42, and the charging device 12 is activated by closing the normally open contact T-a5 to charge the photoreceptor 11. The switch SW6 returns when the transfer paper passes, and when the switch SW5 is actuated by the transfer paper, the CL3 returns and the endless bell) 4
2.46 stops. When switch SW2 is activated by cam 55, relay RA6 is activated and its normally open contact RA is activated.
6-al is closed and self-retained, and the normally open contact RA,
6-a2. - Close RA6-a3 and normally closed contact RA6-
1) Open. The lamp 21 lights up due to the closing of this normally open contact RA6-a2, and the normally open contact RA6-a3
When the motor M3 is closed, the motor M3 rotates in the forward direction, the lamp and the optical system move in the direction of the arrow shown in the figure, and the image of the document on the second surface C of the document table 20 is exposed to the photoreceptor 11, forming an electrostatic latent image thereof. be done.

This electrostatic latent image is developed with toner by a developing device 14. When the lamp 21 and the optical system start, the operation is 1/4.
starts at the same time, l-switch SWI 1 closes.

The copy size setting piece 2 is moved when the image pickup 21 and the optical system are moved.
When the image of the original is exposed to the setting line E, the switch 5W12 is actuated by the actuator 24, and the relay RA 6 is reset. Therefore, when the lamp 21 goes out, the motor M3 reverses, the lamp 21 and the optical system return, and the switch 5
W12 u returns. When the rung 21 and the optical system come to their normal positions, the actuating piece 24 turns the switch SWI1.
opens, the motor M3 stops, and the rung 21 and optical system stop. After that, the switch SW3 is closed by the force l.55, but the solenoid 5OL4 does not operate and the switch Ilj:.
Paper is not fed. Next, when switch sw4 is actuated by cam 55, relay RAS is actuated and its normally open contact RA
5-al is closed and self-retained, and the normally open contact RA
Close 5-a2. When this normally open contact RA5-a2 is closed, the clutch CL3 is activated and the endless belt 42.
46 resumes the reversal. Therefore, the transfer paper on the endless belt 46 is fed between the photoreceptor 11 and the transfer roller 30, and the toner is transferred from the photoreceptor 11 to the transfer paper. As a result, the transfer paper is copied on both sides, and the separation claw 1
8, the image is separated from the photoreceptor 11, guided by guide plates 49, 50, conveyed by an endless belt 51, and fixed by a fixing device 54 during the conveyance. The fixed transfer paper is discharged onto a paper discharge tray, and at this time the switch SW8 is activated. By the operation of this switch SW8, relay RA3,
RA4, timer T, relay RAS,
RA7 returns, solenoid 5OLI returns, transfer roller 30 separates from photoreceptor 11, clutch CL3 returns, and endless bells 42 and 46 stop. Then, the motor M4 reverses and the document table 20 returns to its original position, and when the document table 20 returns to its original normal position, the actuating piece 23 opens the switch SW9, stopping the motor M4 and stopping the document table 20. . The images of the original on the first side B and second side C on the document table 20 are copied on both sides of the transfer sheet discharged to the paper output table, and the sizes of the copies on both sides are different from each other. They are equal to each other and can be arbitrarily set using the copy size setting piece 22.

As described above, according to the electrophotographic copying γf apparatus according to the present invention, it is possible to separately copy two originals on two original placing surfaces, so it is possible to copy on both sides of the transfer paper. In addition, it is also possible to make a compound ηd only on the h side of the paper. Also, it is important to replace not only the two sides of a three-dimensional object, but also the right side of a tree, etc.
can.

@Q'-i Explanation of the Drawings FIG. 1 shows an example of a photocopier with a water-free configuration 1 according to the present invention, and FIG. 2 shows an exposure device I77 in the same embodiment.
FIGS. 3 and 4 are circuit diagrams showing the electrical system in the above embodiment.

DESCRIPTION OF SYMBOLS 11... Photoreceptor, 12... Charging device, 13... Exposure device, 14... Developing device, 15... Transfer'θτ device,
16... Separation device, 17... Rolling device, 18...
Separation device f'i, 20... Document table, 2J... Lamp, 22... Compound = size setting piece, 23. 24...
・Operating piece, 5W9-3W12...Switch, 31...
-Paper feeding device, 45, 54...fixing device.

Procedural amendment (method) Kazuo Wakasugi, Commissioner of the Japan Patent Office 1 Indication of the case Patent Application No. 43676 of 1982 2 Name of the invention Electrophotographic copying device 3 Person making the amendment Relationship to the case Patent applicant name Name (674) Stocks Company Ricoh 4 agent address Tokyo 1! ! :4-5-4-6 Kyodo, Taya-ku
Target of correction

Claims (1)

[Claims] At Shimoshi Kadoma Futoso Oboro, where both sides were first heard, the front side copy was completed, and without being ejected to the outside, the copy was introduced again to the copying department, everything was transported, the back side was fully copied, and then the first V) Ichikosha A's first device to eject the material outside the target.