JPS606973A - Electrophotographic copying machine - Google Patents

Abstract

PURPOSE:To take copy by one-touch operation and improve the operation efficiency by providing a platen with two original placing surfaces, and copying originals on those two original placing surfaces to one-side surfaces of two sheets of copying paper successively. CONSTITUTION:A photosensitive body 11 is formed in a drum shape and has an electrostatic charging device 12, exposing device 13, developing device 14, transferring device 15, separating device 16, etc., at its circumference. The platen has two original placing surfaces, and originals on those two original placing surfaces are copied to one-side surfaces of two sheets of transfer paper to take copies by one-touch operation. Further, copy size is varied by moving a copy size setting piece 22. This constitution improves the efficiency of the copying operation.

Description

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

(Prior Art) Conventionally, electrophotographic copying devices have a document placement surface that is only large enough for one document, so documents must be placed one by one on the document table.
It was not easy to operate and was inefficient.

(Objective) An object of the present invention is to improve the above-mentioned drawbacks and provide an electrophotographic copying device with good operability.

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

As shown in Figures 1 to 2 and 4, the photoreceptor 11 is formed into a drum shape, surrounded by a charging device 12 and an exposure device 13.
, -LMl@device 74, transfer device 15, separation device 16,
Transfer device 17, separation device 18 and cleaning device 19
are sequentially arranged along the rotation direction. As shown in Figure 2, the object to be copied is placed on one of the fang 1 side B and the spear 2 side C bordering on the center reference line A on the transparent document platen 20VC as shown in Figure 2. In other words, the image of the original is sequentially exposed onto the photoreceptor 11 using a slit, and the copy size setting piece 22 is moved from the reference line at a predetermined width while moving the scanning system consisting of the imager 21 and the movable optical system. The image of the document on the document table 20 within the length range up to the setting line E is sequentially exposed. A switch SW9.5W11 is disposed on the reference line h', and switches 5W10 and 5W12 are disposed integrally with the copy size setting piece 22 on the setting +IE. The original platen 20 is normally in the stationary position (n position shown in the figure) where the reference lines A and D coincide, and the operating pieces 23 for operating the switches SW9.5W101 are fixed integrally in correspondence with the reference lines A to K.Switch SV /
An actuation piece 24 for actuating 11.3w12 is integrally fixed to a running system such as the lamp 21, and this actuation piece 24 is normally located on the reference @D. The transfer device 15 is constructed using a transfer roller 25, and the transfer roller 25 is driven to rotate at the same circumferential speed as the photoreceptor 11 in the opposite direction. The 1-photographing roller 25 is pivotally connected to one end of a lever 26, the lever 26 is pivotally supported at the center, and the other end is connected to the movable shaft of the solenoid 5QL2 via a spring 27 and connected to the stationary frame. A return spring 28 is attached between them. When the solenoid 5OL2 is not operating, the transfer roller 25 is rotated by the return spring 28 until the lever 26 touches the stopper 29 and is separated from the photoconductor 11, and when the solenoid 5OL2 is operating, the transfer roller 25 is moved away from the photoreceptor 11.
OL2 vc↓The lever 26 rotates against the spring 28 and comes into pressure contact with the 'C photoreceptor 11. The transfer device 17 is also configured using a transfer roller 30 like the transfer device 15, and when the solenoid s OL i is activated, the transfer roller 6 is activated.
0 is brought into pressure contact with the photoreceptor 11. Further, two transfers may be performed using a charger instead of the transfer roller. A paper feed device 61 is provided between the transfer roller 25 and the photoreceptor 11.
A transfer paper 62 is fed from the paper feeding device 61.
It is constructed using a pair of rollers 33 and 34.

This roller 36 is driven to rotate at a predetermined speed.
4 is pivotally attached to one end of the lever roller 5. The lever 35 is pivoted at the center, and the other end is connected to the solenoid 5 via a spring 36.
A spring 67 is attached to the movable shaft of OL4 and between it and the stationary member. And when the solenoid 5OL4 is not operating, the roller 34 is activated by the return spring 3.
7, the lever 65 is rotated to a position where it touches the stopper 38 and is separated from the roller 36, and when the solenoid 5OL4 is activated, the lever 35 is rotated by the solenoid 5OL4 against the spring 37, and is pressed against the roller 33vc. The transfer paper 62 is transferred one by one from the paper feed tray to the rollers 33, 3.
When the roller 64 comes into pressure contact with the roller 36, the photosensitive member 11 and the transfer roller 25 are sent between the photoreceptor 11 and the transfer roller 25 by the rollers 33 and 34. The separating device 16 uses a separating claw, and the transfer paper separated from the photoreceptor 11 by the separating claw is guided by a guide plate 69.40 and fed into an endless bell 42 by a guide piece 41. The endless belt 42 is passed around rollers 43 and 44, and clutches CL2 and OL
3, the rotation is forward or reverse.

A fixing device 45 is arranged on the endless belt 42, and the transfer paper conveyed by the endless belt 42 is fixed by the fixing device 45K. There is a switch SW6 on the path where the transfer paper is fixed by the fixing device 45 and transported by the forward rotation of the endless belt 42, and a pair of rollers 57 and 58 that are constantly rotating are located roughly outside the roller 44. There is also a K SW7 on the outside, and this Sui Nochi SW6.

SW7 is activated for single-sided copying, and only switch SW6 is activated for screen copying. When the endless belt 42 is reversed, the transfer paper is guided to the endless belt 46 by the guide piece 41. The endless belt 46 is passed over rollers 47 and 48, and when the clutch CL3 is in operation, the endless belt 46 rotates in reverse to convey the transfer paper guided by the guide piece 41 and send it between the photoreceptor 11 and the transfer roller 30. . A switch Sw5 is arranged on the path along which the transfer paper is conveyed by the endless belt 46, and this switch SW5 is activated by the transfer paper. Separation device 18
The separation claws are engaged, and the transfer paper separated by the separation claws is guided by guide plates 49, 5Q and sent to a paper discharge port [1y] by an endless belt 51. The endless belt 51 has rollers 52,5
3K, and the fixing device 54 is arranged above it. A switch SW8 is provided between the fixing device 54 and the paper ejection port.
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, terminal B1. If the tie/switch MS is connected to the AC power source B2 and the tie/switch MS is closed, the output of the AC power source will be transmitted through the fuse F to the terminal B3. The voltage is applied between B4 and the fixing device 45.
．． 54 and the motor M1 are supplied with power and become operational, and the developing bag 14 and the relieving equipment fi are powered by the motor MIK.
When the switch 19 is activated, the photoreceptor 11 is driven to rotate, and the timer T1 is supplied with power.

When the single-sided pre/to switch SSW is closed in this state, relay RA2 is activated and closes its normally open contact FtA2-al to maintain its self-holding state, and the normally open contacts RA and 2-a2 are closed.
, RA2-a3 is closed and normally open liquid, 4. RA2-
Open bl~RA2-b3. The relay RA1 is activated by the closing of the normally open contact RA2-a2, and one normally open contact RA1-e is closed to maintain itself, and the normally open contacts R, AI-a2 to RA1-a5 are closed. Closing of this normally open contact RAI-a2 (relay RA4
operates and closes its normally open contact RA4-al to self-retain, and the normally open liquid, (v RA4-a2, RA
4- Close a3. This normally open contact RA4-a
The closing of solenoid 5OL2.

5OL3 is activated, and the transfer row 225 is brought into pressure contact with the photoreceptor 11, and at the same time, the separating claw 16 is brought into contact with the photoreceptor 11vc.

Also, normally open fluid, clutch C is closed by closing @ RAl-a4.
L and 2 operate to rotate the endless belt 42 in the forward direction, and the charging device 1
2 is a normally open liquid, and when the terminals RA1 to RA5 are closed, power output is supplied and the photoreceptor 11 is charged. Clutch cr=i is activated when the normally open contacts RA1-a3 are closed, and the cam 55 is rotationally driven. Switch sw1 is cam 5
When 5 rotates from its normal position, it closes. Thereafter, when switch SW2 is closed by cam 55, relay 1 (A
6 operates to close its normally open contact Rk6-al and maintain itself, and the normally open contacts RA6-a2 and RA6
-a, 3 are closed and normally closed contact RA6-b is opened.

By closing this normally open contact RA6-a2, rung 21
lights up, and the normally open contact RA6-a3 is closed, causing the motor M6 to rotate in the normal direction, causing the motor M6 and the optical system to move in the direction of the arrow shown in the figure, so that the image of the original on the first side B of the original table 200 is exposed to light. The body 11 is exposed to light to form an electrostatic latent image thereof, 1"1.
Ru.

This electrostatic a[image] is developed with toner by the developing device 14. When the lamp 21 and the optical system start, the actuating piece 2
4 starts at the same time, and switch 5W11 closes. The lamp 21 and the optical system move to set the copy size setting piece 2.
When the image of the original is exposed up to the setting line E according to 2, switch 5W12 is activated from actuating piece 24 and relay RA6 is activated.
will return. Therefore, when the lamp 21 goes out, the motor M5 is reversed, the lamp 21 and the optical system are restored, and the switch 5W12 is restored. In the case of one-sided copying, the switch SVI 13 is closed when the originals on the spears 1B and 2C of the document table 20 are alternately copied. Therefore, when switch 5W13 is closed, switch 5W12
When activated, relay RA7 is activated and its normally open liquid, (K
RA7-al is closed for self-holding, the normally open contacts RA and 7-a2 are closed, and the normally closed contact RA7-D is opened. By closing the normally open contact RA7-a2, the document table 20 is driven by the motor M4 in the direction of the arrow VC. When the document table 20 moves, the actuating piece 26 simultaneously 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 5W10 is actuated by the operating piece 23, the motor M4 is stopped, and the document table 20 is stopped. U/P2
4 and the optical system come to their normal positions, the actuating piece 24 opens the switch 5w1i, the motor M3 stops, and the lamp 21 and the optical system stop. Then switch S
When W3 is closed by cam 55, solenoid 5OL
4 operates and the transfer paper 62 is transferred between the transfer roller 25 and the photoreceptor 1.
Transfer paper 32K may be sent between photoreceptor 11 and
) color is transferred. The transfer paper is separated from the photoreceptor 11 by the disassembling claw 16, guided by guide plates 39, 40, fed to the endless belt 42 by the guide piece 41, and conveyed by the endless belt 42. During the conveyance, the toner is fixed by the fixing device 45. be done. After this transfer paper is fixed in the fixing device 45, when the switch SW6 is activated, the relay R
When A1 returns and the charging device 12 ceases to operate, relay 1RA6 operates to close its normally open contact RA3-a to self-retain, and normally open contact RA3-a2.
is closed to supply power to timer T and normally closed contact RA-01
゜RA3-o2 Open. This ever-open liquid 7Q fat 6-
By opening D2, solenoid 5OL2. 5OL3 returns and the transfer roller 25 and separation claw 16 separate from the photoreceptor 11.

The transfer paper fixed by the fixing device 45 is further conveyed and discharged to the paper discharge tray, but in the middle of the process, the switch SW7 is activated and the relay 'BA2. RA4 stops operating, timer T stops power supply, and the electrical system is released.

Therefore, the transfer paper is copied on one side and then discharged, and the copy size can be changed by moving the copy size setting piece 22. switch 5w
13 is closed, if the switch SSW is closed before the set time of about 20 seconds has elapsed after the timer T1 is turned off by the switch SW7, and the exposure for the next copying operation is performed, the document table is closed. The original on the second side C of No. 20 is similarly VC-copied. When the timer T1 is turned on and its normally open contact T1-a returns, the relay RA7 returns, the motor M4 reverses, the document table 2o returns to its original position, and the document table 20 returns to its original normal position. At this time, switch SW9 is opened by operating piece 26, motor M4 is stopped, and document table 20 is stopped. Therefore, when the switch 5W13 is closed, the originals on the 2nd and 1st sides B on the original platen 2o and the originals on the 2nd and 1st sides C are alternately copied on one side. When the switch 5W13 is not closed, only the document on the first side B''2 of the document table 20 is copied.

Furthermore, when the double-sided printed switch DSW is closed with the main switch MS closed, the relay RA1 is activated, closing its normally open contacts RA1~a1 to maintain self-holding, and normally open contacts FtA2-a, 2~ Close RA2-a5. The closing of this normally open contact RAI-a2 activates relay RA4, which closes its normally open contact RA4-al and maintains itself.
, r(A4- close a3. And this normally open junction, f
jRAd-a3) Closed Nyori 7 L/ / (To 5
OL2 and 5OL3 are operated, and the transfer roller 25 is brought into pressure contact with the photoreceptor 11π, and the separation claw 16 is brought into contact with the photoreceptor 11vc together with t'1. Furthermore, normally open connection, ZuRAI-a4
To close the ↓ recla notch CL2 operates and the endless belt 42
Rotate forward. Also, by closing the normally open contacts FtA1-a5, the charging device 12 is supplied with power and operates to charge the photoreceptor 11, and by closing the normally open contacts RAI-a3, the clutch C'L1 is activated! At n11, the cam 55 is rotationally driven. The switch SW1 closes when the cam 55 rotates from the γ normal position. After that, switch SW2 is set to cam 55! When the relay RA-6 is closed, the relay RA-6 operates to close its normally open contacts RA6-a, 1 and maintain itself, and the normally open contacts RA6-a2, RA6-a6
Normally closed contact RA6-b is opened. By closing this normally open contact RA6-a2, the wrap 21 lights up, and the normally open contact (g). 1The manuscript on B (the elephant is photoreceptor 11)
When exposed to light, an electrostatic latent image is formed. This static image is developed with toner by an image device 14.

When the U/P 21 and Y6 systems start, the actuating piece 24
h and I start at the same time and switch swi i closes. The copy size setting piece 2 moves when the copy size setting piece 2 and the optical system move.
When one image of the original is exposed up to the setting line E by 2TL,
Switch SW12 is actuated by actuation piece 24, and relay RA6 is reset. Therefore, as soon as the lamp 21 disappears, the motor M6 reverses, and when the lamp 21 and the optical system come to their normal positions, the actuating piece 24 activates the switch SW11.
opens, the motor M3 stops, and the mirror 21 and optical system stop. Furthermore, when the switch SW12 is actuated by the actuating piece 24, the 1-RA7 is activated, and its normally open contact RA7-a1 is closed and self-maintained, and the normally open contact 4 RA7-a2 is closed and normally closed. Open contact RA7-b. By closing the normally open contact RA7-a2, the document table 20 is driven by the motor M4 in the direction of the arrow shown in the figure. At the same time as the document table 20 moves, the actuating piece 2 moves,
Close switch sw9. When the document table 20 moves and its reference @A reaches the setting line F formed by the copy size setting piece 22, the switch 5w1o is actuated by the operating piece 23vc, the motor M4 is stopped, and the document table 20 is stopped. After that, switch SW3 is made by cam 55! When Iν1, the solenoid 5QL4 is activated and the transfer paper 52 is transferred to the transfer roller 2.
5 and the photoreceptor 11, and the toner is transferred from the photoreceptor 11 to the transfer paper 62. The transfer paper is separated by the separation claw 1.
The photoreceptor 11 is also separated from the photoreceptor 6vc, guided by guide plates 39 and 40, sent to the p7B6 end bell) 42 by the guide piece 41, and conveyed by the endless belt 42.

During the conveyance, the toner is fixed by the fixing device 45.

When the transfer paper activates switch SW6, relay R
AI is restored, the charging device 12 is restored, the clutch CL2 is turned off, and the endless belt 42 is stopped. In addition, relays RA and 3 are activated by the operation of switch SW6, and their normally open contact RA is activated.
3-Al is closed and self-retained, and the normally open contact R
A3-a2 is closed to supply power to the timer TVC, and normally closed contacts RA3-bl and RA3-D2 are opened.

This normally closed connection causes solenoid 5OL2. 5OL3 returns and the transfer roller 25 and separating claw 16 are also separated from the photoreceptor 11. The cam 55 passes through the switch SW4 and continues to rotate. When the timer T is set for 141 minutes after power is supplied, it operates and closes the normally open contacts T-a1 to T-a5, and the normally open contacts 'r-b
to open. Closing of the normally open contact T-a2 activates the solenoid 5OLl, and the transfer roller 30 is brought into pressure contact with the photoreceptor 11, and closing of the normally open rear door T-a3 causes the solenoid 5OLl to operate.

CL1 continues to operate, and the cam 55 continues to rotate.

Also, by closing the normally open contact T-a, 4, clutch CL3
operates and the endless belt) 42.46 reverses and the endless belt 4
2 The upper 1 transfer paper is transported and the normally open contact T'-a5
When W+ is closed, the charging device 12 is activated and the photoreceptor 11 is charged. The switch SW6 returns when the transfer paper passes, and when the switch SW5 is actuated by the transfer paper, the clutch CL3 returns and the endless bells 42 and 46 stop. When switch SW2 is actuated by cam 55, relay RA6 is actuated and its normally open contact RA6-al is closed and self-holding, and normally open, @RA6-a2゜R.
A6-a3 is closed and normally closed contact RA6-t) is opened.

Due to the closure of this normally open contact, r@RA6- a2 /
When the lamp 21 is turned on and the normally open contact RA6-a3 is closed, the motor M6 rotates in the normal direction, and the lamp and optical system move in the direction of the arrow shown in the figure. is exposed to light on the photoreceptor 11, and an electrostatic latent image thereof is formed.

This electrostatic latent image is visualized with toner by a +M1 imager 14. When the wrap 21 and the optical system start, the actuating piece 24 starts at the same time and the switch SW11 closes. The rung 21 and optical system move to copy size setting piece 2.
When the image of the original is exposed to the setting line E according to 2, the switch 5W12 is activated by the actuating piece 24, and the relay RA6 is activated.
will return. Therefore, when the lamp 1 goes out, the motor M6 reverses, the lamp 21 and the optical system return, and the switch SWi2 returns to its original state. When the wrap 21 and the optical system come to their normal positions, the switch SW is activated by the actuating piece 24.
11 opens, motor M6 stops, and lamp 21 and optical system stop. After that, switch SW6 switches cam 55 to J.
However, the solenoid 5OL4 does not operate and the transfer paper is not fed. Next, when switch SW4 is actuated by cam 55, relay RA5 is actuated and its normally open contact R
A5-. al is closed for self-holding, and the normally open contact RA5-a2 is closed. This normally open contact RA, 5-
When a2 is closed, the clutch CL3 is activated and the endless bell (42, 46) resumes reverse rotation. Therefore, the transfer paper on the endless belt 46 is fed between the photoreceptor 11 and the roller 60, 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 photoreceptor 11 is also separated by the separating claw 18, and the guide roller 4
9.50 and is conveyed by the endless belt 51, and is fixed by the fixing device 54 during the conveyance. This fixed transfer paper is ejected to the paper ejection table, but at this time, the switch S
Activate W8. By operating this switch sw8
Relay RA3. RA4. Timer T, Relay RAS.

h7, the return solenoid 5OLI returns, the transfer roller 60 separates from the photoreceptor 11, the clutch CL3 returns, and the endless bell) 42, 46 stops. and motor M4
is reversed and the document table 20 returns to its original position, and when the document table 20 returns to its original normal position, the switch SW9 is opened by the operating piece 23, the motor M4 is stopped, and the document table 20 is stopped. The transfer paper discharged to the paper output tray is placed on the document tray 2Dvc.
The dimensions of the original on the 1st side B and 172nd side C are copied on both sides, and the sizes of the copies on both sides are equal and can be arbitrarily set using the copy size setting piece 22KJ'.

(Effects) As described above, according to the electrophotographic copying apparatus according to the present invention, the document table has two document placement surfaces, and each document on these two document placement surfaces is sequentially transferred [two sheets Since the copy is made on one side of the paper, it is possible to copy both pages of a document such as a book using a hand/knot operation without having to exchange them, and is particularly effective for copying books. A: Two originals can be set on the manuscript table at once, which is efficient.

[Brief explanation of drawings]

Figure 1 of the crucible is a block diagram showing a practical case of the present invention, Figures A and 2 are block diagrams showing a part of the exposure apparatus in the same case of leprosy, 3=6
Figures 4 and 4 are circuit diagrams showing the electrical system in the above-mentioned actual example. DESCRIPTION OF SYMBOLS 11... Photoreceptor, 12... Charging device, 16... Exposure device, 14-Developing device, 15- Transfer device, 16...
Separation device, 17・Transfer device, 18・Separation device, 20・
- Original table, 21... Wrap, 22... Copy size setting piece, 23.24... Operating piece, SW9 to 5W12... Switch, 61... Paper feeding device, 45, 54... Fixing device.

Claims (1)

[Claims] A document table with two document placement surfaces on the same plane divided into two, and an image of each document on the two document placement surfaces.
Next, there is a means for sequentially forming two a-images corresponding to the images of each of the original documents on the photoreceptor by exposing the photoreceptor, and a means for sequentially developing two a-images corresponding to the images of the respective originals on the photoreceptor; An electrophotographic copying device equipped with a developing transfer means for transferring onto each side of transfer paper.