JPS60133470A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent malfunction and improve operativity by inhibiting a paper feed part or storage part from being switched during image forming operation. CONSTITUTION:When a tray selection key PBT is pressed, a voltage is applied to a coil S of a latching relay K2 and a contact K2-1 is connected to a side (a). Then, a current flows through a solenoid SL1 and an electromagnetic plunger 63 draws a lever 64 to move a conveyor belt 19 to the paper ejecting port at the side of a tray 14 as shown by a dotted line. When a sorter selection key PBS is pressed, a voltage is applied to a coil R of the relay K2 to connect the contacts K2-1 to a side (b), and the solenoid SL1 is released to move the conveyor belt 19 to the paper ejecting exit at the side of a sorter 18 as shown by a solid line. When a copy signal CPY rises to ''1'', a relay K1 turns on to break a contact K1-1 and the relay K2 does not open even when the PBS and PBT are pressed, inhibiting switching operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus having at least one of a plurality of paper feeding sections and storage sections for sheet-like image carriers.

Conventionally, in an image forming apparatus 11 having two storage sections, one with a tray and the other with an opening, each storage section can be selected and used by switching between the storage sections by pressing a button. There is.

In addition, we also provide transfer &
Even in both image forming apparatuses that have a plurality of paper feeding sections that feed paper, each paper feeding section is normally used by changing the paper feeding section by pressing a button.

In such an image forming apparatus, a desired storage section or paper feed section is selected and the paper is accidentally stored (81) or paper feed section 1 during image formation.
If the button for switching 1i is pressed, the storage section or paper feed 81i will be switched to another power source, and the operator will have to collect the sheets again or redo image formation later, which is an inconvenience. It was alive.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an image forming apparatus that eliminates the above disadvantages, prevents malfunctions during image formation, and improves operability.

That is, the present invention provides an image forming apparatus in which at least one of a sheet I-shaped image bearing member has a plurality of paper feeding sections and a plurality of storage sections;
, , 1, there is provided an image forming apparatus characterized in that switching between paper feed B3 and storage B1 is prohibited during image forming operation.

The present invention will be explained below with reference to the drawings.

FIG. 1 is a schematic sectional view of an electronic copying machine to which the present invention can be applied. In the figure, 1 is a mesh photosensitive drum having a transparent insulating layer, a photoconductive layer, and a conductive layer from the surface (for example, detailed in Published Patent No. 19455 of 1975), 2 is a charging device, and 3
is a secondary charger, 4 is a lamp, 5 is a document table, 6 is a modulation charger, 7 is an insulated drum, 8 is a developer, 9A is a roller that feeds A4 size transfer paper 10A, 9B is a B4 size transfer paper A roller that feeds 10B paper.

11 is a transfer charger, 12 is a conveyor belt, 13 is a fixing roller, 14 is a tray, 18 is a sorter, 2O is 10 pins, 52A is a case foot that supplies the transfer paper 10A, and 52B is a paper feeder that supplies the transfer paper 1OB. Kasen). The document on the document table 5 is subjected to slint exposure using the lamp 4 while moving the mirror 15, and the rotating photosensitive drum l, which has been previously charged by the secondary charger 2, is subjected to secondary charging by the secondary charger 3 at the same time. The exposed image is irradiated to form a -order electrostatic latent image. Said-
Next, a latent image is placed on the surface of the insulating drum 7 by the modulation charger 6,
A secondary electrostatic latent image is formed, and the secondary image is developed by a developing device 8.

The toner image is transferred by the charger 11 to the transfer paper 10A or 10B fed from the paper feeding force sensor) 52A or 52B, and t) the transfer paper 11 is transferred.

A, IOB is conveyed, and the IOB is
・Fix the toner image and discharge it to the sorter 18 or tray 14. Since the primary latent image does not disappear even after the fourth latent image is formed, the photosensitive drum l is further rotated and the charger 6 continuously forms a secondary latent image, and the transfer paper 10 is transferred one after another. It is sent to the department and continues to be transferred, fixed, and released.

16 is a lamp for removing the surface charge of the photosensitive drum 1;
A cleaning section 17 removes toner from the surface of the insulating drum 7.

FIG. 2 is a top view of the operation display panel of the apparatus shown in FIG. In the figure, 21 is a copy start button, 22 is a setting key for the number of copies, 23 is a set number of copies display, PBT is a tray selection key, PBS is a sorter selection key, 26 is an indicator to indicate whether the current storage section is a sorter or a tray. , PBA is the A4 size cassette selection key, PBB is the B4 size cassette selection 4 (key,
28 is its display.

When the tray 14 is selected as the storage section, the conveyor belt 19 is set at the position indicated by the dotted line in FIG.
will be stored in. When the sorter 18 is selected as the storage section, the bell 19 is placed at the position indicated by the solid line, and the transfer paper 1o is first taken out from the second discharge roller 51 and stored in the sorter. Further, when A4 size is selected, if there is A4 size transfer paper in the main paper feed force sensor 52A, that is specified. Reference numeral 52B is a sub-cassette, and when the main cassette 1iiii runs out of paper, if there is paper of the same size as the main cassette 52A, it automatically feeds paper a-ra 9'I! 1g! vJ is switched and paper is fed from the sub-cassette '7 52B. In addition, the main sensor l-52A is 2ooo to 3ooo pieces,
The sub cassette 52 can store 500-1000 sheets of paper. The paper sent to the sorter 1-8 is carried by the constantly rotating belt 55 and sent to the pins. Guide pawls a-i are provided at each pin (+1), and the guide pawls are activated in sequence at 4U where the detectors 61. and 62 detect the paper, and the paper is stored in each pin toward the bin.

Next, change the tray and sorter storage section νJ11)H
I will talk about JII. FIG. 3 shows a tray and sorter glue change control circuit, and FIG. 4 shows a timing chart for each part. SLI is a solenoid for changing the train VJ, K1 and 2 and 3 are relays, L
T is the tray usage display lamp, LS is the sorter usage indicator small lamp, and Ql is the unijunction transistor (hereinafter referred to as UJ).
), CP1' is the copy signal, and ECI is the content/container signal.
The terminal voltage of C1, ER5 is the terminal '1R voltage of resistor R5,
SK2 represents an input signal to the coil S of 2, and SSL represents an input signal to the solenoid SLI. Storage 17
The key to select the tray as B is PBT, and the key to select the sorter is PBS. When you press the key PBT, the 2nd coil S is added to the latching relay, and the 2-
11 and is connected to the a side. Since the relay is no longer energized by 2, it is a 3-way relay, so the 4 major YH1
When the contact point 2-1 is connected to the a side while maintaining the exit position indicator lamp LT, the exit position indicator lamp LT lights up and is displayed on the display 26 in FIG. 2 to notify the user. At the same time, current flows through the solenoid SLI, activating the solenoid SLI.゛Pull the turret planer 63 or the lever 64 to release the pair of upper and lower transport belts 19.
Or IjI, place 'i' on line A, DI paper out on the beating tray side 1-
Move to 1. When the sorter selection key PBS is pressed, voltage is applied to coil R of 2 in the relay, which causes the contact point to change to 2-1.
is connected to b, and at the same time the position indicator lamp LS lights up to notify the user, the excitation of the slide/id SLI is removed, so the plunger 63 is also released, and the lever 64 is moved to the position where the transfer bell (19) is shown by the solid line. Position I! Move to the sorter side paper discharge 11.

The operation of the 11-control circuit when the sorter 18 is selected as the storage section is shown in Figure 4.The copy button 2 is pressed at time TI.
Press I to copy and believe CPR is at “1” level.
When the relay 1 turns on, the 11:5 contact of the contact K1-1 closes or opens, and even if the PBS or PBT keys are pressed, the relay 2 does not operate, creating a so-called νJ change-prohibited 1L state. At the same time, the contact K1-2 is closed to stop the charging of the capacitor CI. I believe that copying will end at time T2 C
When PY turns ``O'', relay K1 turns off, and the contact K1-1 closes, and the prohibition signal y〆 is released, making it possible to change the signal.
2 is opened, and charging of Jl to capacitor C1 via resistor R2 and R3 is started. A charging circuit composed of resistors R2 and R3 and a capacitor C1 is connected to the emitter of UJTQI, and when UJTQI is opened,
When the 1L pressure ratio is η, the voltage of capacitor C1 is 24×η(
V) [15, that is, at time T3, UJTQI has a low resistance between the base and the emitter, and the charge of the capacitor C1 is discharged through the resistor R5, and a 1F voltage is generated in the resistor R5. This is a well-known oscillation circuit, and the oscillation layer 1-1 of this oscillation circuit can be adjusted by the IIf variable resistor R2.
Here, choose between 30 seconds and 60 seconds. The oscillation output of this oscillation circuit is the voltage ER5 across the resistor R5,
This output is amplified by transistors Q2 and Q4 and sent to coil S of relay 2. The coil S in relay 2 is energized at time T3, which is 30 to 60 seconds after the copy end time T2, and the contact IHg K 2-1 is switched to the a side, so the solenoid SLI is energized. The magnetic plunger 63 is activated, and the conveyor belt 10 moves toward the tray 14 to the position indicated by the dotted line. However, if the key PBS is pressed between time T2 and T3, relay 3 is turned on, and this closes only when the connection H4, K 3-1 or the key FBS is pressed, discharging the capacitor C1. When the copy button 21 is pressed at time T5, the belt 19 is discharged to the sorter 18 side until the position indicated by the solid line; t.

Next, after the belt 19 moves to the tray 14 side, the key PBS is pressed at time T6, and then the interval 30
If the copy button 21 is not pressed between seconds and 60 seconds, the oscillation circuit will wake up the lli again at time T7. It is amplified by Q4, and the coil S of 2 is energized and connected to the 1st loop (1,<R2-1 or a side, so the solenoid SLI is energized, and the magnetic plunger 63 of 1 is activated, and 7
, the conveyor belt is set 71 on the l sea 14 side.

Here, the operation immediately after the Ichihara switch is turned on will be described. 2 contacts K 2-1 Lt a (Ill
It is unclear whether Ii, = exists or is on the b side. So the resistance R
9. Using a time constant circuit consisting of RIO and capacitor C2, operate transistor Q3 immediately after the power is turned off, apply a pulse with a certain width to coil S of 2 to 1 loop, and connect 2-1 to the contact point.
to the a side. '1fi 7g+ Immediately after turning on, the charge of capacitor C2 is 0, so it is charged by resistors R9 and RLo.

Until this charging is completed, transistor Q3 operates, and I/Run star Q4 also operates via R7. The collector current of the transistor Q4 +f flows through the second coil S to the relay. As a result, the contact point 2-1 is connected to the a side, and the solenoid l'SLI is energized to operate the electromagnetic plunger 63.

Incidentally, the belt may be set after a certain period of time after Ichihara is turned on.

In the unimplemented example, it is also possible to provide a JJI paper output 1 for each storage section, or to replace the IIM paper output 1-1 by moving only the IIM storage section while keeping the I1 paper output 1-1 constant.

In this example! ilJ replaced mode] was set on the relay side, but it is up to the user to set it there.

Next, replacing the paper feed force sensor will be explained in detail with reference to the drawings. Figure 5 is a paper cassette! , Controls for IJ replacement 1) 11 Circuit diagram, Figure 3 is the part surrounded by a broken line x and the selection key from PBT, PBS to PBA, PB
B [It's just a different idea, and the same symbol is used for things that work in the same way as in Figure 3.] FIG. 6 shows the signal i skin diagrams of each part. PBA is A
4 size cassettes... 1. Push-button key for instructions, PBB is B4 cassette, 71. Push-button key for small finger, 21 is copy button, LA is A4 sash use indicator lamp, L B
B4 center use indicator lamp, K1 is copy signal CP
The relay that holds Y, K2 is a latching relay,
Relay Kl and 2 select A4 cassette instruction solenoid SLA or B4 cassette instruction solenoid SLB.

ECI is the terminal voltage of capacitor C1, ER5 is 11v,
Anti-R5t7) Terminal type 1 [, S K 2 C+iij i
') A pulse input signal to the coil S of L/-K2, SA a pulse input signal to the solenoid I'SLA, and SB a pulse input signal to the solenoid I'SLB, respectively.1iiJ Note: When switch PBA is pressed, voltage is applied to coil S of 2 in the latching relay, and contact 2-1 is connected to the a side. (When K2 is no longer energized, the relay remains in the - state, so it remains in the negative state.) As a result, the lamp LA lights up to notify the user. At the same time, the solenoid SLA is turned on, and the first illustrated plunger 65A operated by the solenoid SLA moves 1'1;
l//<-(3(3A is drawn, fiB4s4 S' l
, the roller 9B or 11ill from the i-photograph 10B comes to the position indicated by the dotted line. Kaburanosha 65B is removed by 1 bamboo, and roller 9A is placed at the solid line (Jl), so A4 size transfer paper 10A is fed from case sheet 52A. roller 9
A rotates and the A4 transfer paper 10A is fed. Here, Laura is 9A, 9B]! , or only 9A.

Also, when the B4 size selection key PBB is pressed, K2-1 is connected to the b side, and when the B4 table cover LB lights up, the solenoid SLB is turned on, and the planosha 65B or 1' is activated by the solenoid SLH! move, reno <-6
613 is pulled and roller 9 is drawn from A4 size transfer paper 10A.
A or the devil will come to the position of the dotted line. - The cover sheet 65A is released and the roller 9B comes to the position 1'I'i of the solid line, so the B4 size transfer paper lOB is fed from the tray 52B. After completing the semi-transfer stage 11, press the copy button 21 to transfer the paper. Paper 10B is fed. Next, the operation when the B4 size selection key PBB is pressed and then the copy button 21 is pressed will be described. When the switch PBB is pressed at the 11+1 clock TO in FIG. 6 and the lii + copy button 21 is pressed at the 1147 clock T1, copying starts in the reduction mode, the copy signal CPY becomes "°1" level, and the relay Kl is turned on L.
Since point K1-1 is open, relay 2 will not operate even if the key PBA is pressed. A so-called νJ switching inhibition layer is created. Another contact K related to relay Kl
Since l-2 is closed, capacitor C1 is not filled. When copying ends at time T2, copying takes 1.5 hours.
°0°°Rehel, 1 is off in the relay, 1-1 is closed in the contact, and the prohibition letter! Le, ka release narire J'
Changed to J and became 11-cho Noh. At the same time, the contacts 1-2 are opened, and the capacitor C1 is connected via the resistors R2 and R3.
Charging is started. Jl (The charging circuit composed of resistors R2, R3 and capacitor C1 is the emitter of uni-shuction transistor (hereinafter referred to as 1-' UJ, T) Ql.

In the evening, I was concubined, and - U J T Q l was released.”
1, the voltage of capacitor C1 is 24×η.
(V)+, :Na ivy 11. 'J Sokuchi 11. 'i hour T
3 Near 3 Ite U J TQl has a low resistance between the pace and the emitter, and the capacitor CI's I'J is discharged through the resistor R5, and a pressure 'I' is generated in the resistor R5. This is a well-known oscillation circuit, and the oscillation period of this oscillation circuit is selected to be about 30 seconds to 60 seconds in this case, which can be adjusted by II) variable resistor R2. The oscillation jhU output of this oscillation circuit is -1 voltage applied to the resistor R5, and this output is increased by 1 using transistors Q2 and Q4 and 2 applied to the relay.
Apply manual power to the coil S. Then, the coil S of relay 2 is energized at time T3, which is 30 to 60 seconds after time T2, and the contact 2-1 is switched to the a side, and A4 Zycoby mode ( (hereinafter referred to as A4 mode).

However, if you press the copy button 2 again between T2 and T3 at 111'' mark, B4 size copy mode (hereinafter referred to as B4
(referred to as mote). Also, A4 mo~1・
When the key PBB is pressed at time T4, 3 turns on/' to the relay, which causes the contact 3-1 to close only when the r'ii 4 key PBB is pressed, discharging the capacitor CI. If the copy button 21 is pressed at time T5 in B4 mode, a B4 size copy will be made.

Next, after switching to A4 mode, the Swift P
After pressing BE at 11+f time T6, if the copy button 21 is not pressed for +iir time interval 30 seconds to 60 seconds, the +11+f oscillation circuit starts oscillating at time T7.
Transistor Q2. Coil S of 2 is excited in the relay through Q4 and connected to the contact point 2-1 or A side, and A4 motor 1
・It becomes.

Here, the electricity is turned on; (describe the operation immediately after the switch is turned on. After turning on 11°L, the relay contacts 2 and 2-1 is on the a side or b
It's on the side, but it's unclear. Therefore, using a time constant circuit of resistors R9, RIO and capacitor c2, the transistor Q3 is activated immediately after the voltage x1 is turned on, and a pulse with a certain width is applied to the coil S of 2 to set the A4 mode to 1. 'll! of capacitor C2 immediately after power off! , since the load is O,
Jl (sold by anti-R9, R1O. Transistor Q3 will be activated until it is completed in the future, and R7
The transistor Q4 is operated by 4'+. The collector current of transistor Q4 flows through two coils S of the relay. As a result, the contact point 2-1 is connected to the a side,
Solenoid SL4 turns on and becomes A4 mode 1.

In this embodiment, the setting is made so that the VJ is changed to A4 mode 1. However, the user is free to choose which one to set.

In addition, in this embodiment, as mentioned above, only the size can be changed, and since the paper feeding power can be changed + RF, it is possible to change the size of the cassettes, which are differentiated by the material or color of the transfer paper. , IJ replacement is of course possible.

In addition, in this embodiment, the re-plunger is operated by the solenoid, and the roller is moved more than the paper. lk*J1
-+j>L, -1--f-hJ? ,,,l,2ζ−:'
1ljJL'lf-bu ~ ζQ-draw the number, seasonal mama\
It is also possible to select the center by controlling the rotation of each roller Φ and the drive unit.

In addition, although the above explanation has been explained separately for switching the storage section and switching the paper feed section, the present invention also allows switching to a mote that uses both the storage section and the paper feed section at the same time. It is also possible to replace one take-J by operating just one control circuit.

As described above-1-, according to this embodiment, an image forming apparatus such as a copying machine can be used after an image is formed by a normal user or by using an unused storage section, or when the image forming apparatus is not used regularly. If you do not issue an image formation instruction within a certain period of 11 days after selecting a storage area that does not have a
Finger of the storage section > 1 < J Eisaku You can automatically switch to the storage section to be used without having to do anything.

Similarly, after the user forms an image using a paper feed section that is not normally used, or after selecting a paper feed section that is not normally used, the user performs image formation within a certain period of time. If not, or immediately after turning on Ichihara, it is necessary to operate the paper feed section from 1-7 to 1'-1 dynamically to the normally used paper feed section! , IJ can be replaced.

In addition, regarding the above +1) both blades of the handle and the paper feed section, the 11 slots that are used at the same time are automatically set to the 7//', 7/' It is also possible to change it.

As described above, according to the present invention, since it is prohibited to change the image size in the storage section or the paper feed section during image formation, malfunctions can be prevented during image formation, and the operation can be done easily. It is possible to perform image formation without increasing the image quality by increasing the TRF function.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of an electronic copying machine according to the present invention, FIG. 2 is a top view of the operation display panel of the apparatus shown in FIG. Figure 4 shows the believed waveform 1/[ of each part of the circuit of No. 31ffl, and Figure 5 shows the stripe waveform in the present invention (replacement of part 1/il) I 1
211 circuit diagram, FIG. 6 is a signal waveform diagram of each part of the circuit of FIG. 9A, 9B, 19 are rollers, IOA, IOB are transfer paper,
14 is a tray, 18 is a sorter, 12 is a conveyor belt, 20
21 is a copy button, 52A and 52B are cassettes, and 63 and 65A. 65B is a plunger, LT, LS, LA, LB are indicator lamps, PBT, PSS, PBA, PBB are keys respectively.

Claims (1)

[Claims] In an image forming apparatus in which at least one of a plurality of paper feeding sections or storage sections for a sheet-shaped image carrier is plural, during image forming operation, the paper feeding sections or storage sections 7t, l! of! An image forming apparatus characterized in that ilJ switching is prohibited.