JPS58127946A - Copying machine - Google Patents

Abstract

PURPOSE:To make a titled copying machine easy to use by making the copying mode to be set by resetting selectable. CONSTITUTION:A control CPU202 reads the keys in an operating part and a cassette size by a key matrix circuit 204, detects the inputting of a copying key, etc. by driving an operating part display circuit 203 and outputs a copying command to a sequence CPU201. On the other hand, the CPU201 receives the copying command, applies the signal to a setting circuit 205 for an optical system and sets the optical system at a desired magnification. Also, said CPU applies the signal to a driving circuit 206 for image formation so as to start the sequence for image formation by various exposure circuits and driving circuits for motors and a high-voltage power source.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine having a cover function, that is, an auto-reset function.

In conventional copying machines having an auto-reset function, the user cannot freely determine the auto-reset. For example, in a copying machine that has a copy number setting function and a variable magnification (reduction, 2 equal magnification, enlargement) function, the number of copies is reset to 11 equal magnification mode. Therefore, this type of uniform presetting is not preferable for users who frequently use a copying mode different from the copying mode preset by this reset.

The present invention aims to eliminate these disadvantages of conventional copying machines, particularly in terms of operability, and to propose a copying machine that can be preset to a copying mode desired by the user.

A detailed explanation will be given below with reference to FIGS. 1 to 4 (a) to (c).

FIG. 1 is a sectional view of a copying apparatus showing one embodiment of the present invention, and its structure and operation will be explained.

In FIG. 1, the surface of the drum 2 is made of a three-layer seamless photoconductor using a CDS photoconductor, is rotatably supported on a shaft, and is driven by a main motor 3, which is activated by turning on the copy key, as indicated by the arrow. Start rotating in the direction of . When the drum 2 completes a predetermined preprocessing rotation, the original 5 placed on the original platen glass 4 is illuminated by an illumination lamp 7 that is integrated with the first scanning mirror 6, and the reflected light is transmitted to the first scanning mirror. 6 and a second scanning mirror 8. By moving the first scanning mirror 6 and the second scanning mirror 8 at a speed ratio of 1:1/2, the original is scanned while the optical path length in front of the in-mirror lens 9 is always kept constant. The reflected light image above is the in-mirror lens 9 and the third lens? After passing through -10, an image is formed on the drum 2 at the exposure section A.

The drum 2 is statically neutralized by a pre-exposure lamp 1 and a pre-static eliminator 2 prior to the incidence of image light.

- It is corona charged (for example, ■) by the charged electricity 13.

Thereafter, the drum 2 is subjected to slit exposure of the reflective structure of the original 5 in the exposure section A. At the same time, the secondary charger 14 performs corona charge removal using AC or a polarity opposite to that of the primary charger (e.g. e).
After that, a high-contrast electrostatic latent image is formed on the drum 2 by uniformly exposing the entire surface of the page using the full-surface exposure lamp 15.

The electrostatic latent image on the photosensitive drum 2 is then developed by a developing roller of a developing device 16 and visualized as a toner image, and the toner image is transferred to a transfer sheet at a transfer section B by a transfer charger 17. The transfer paper is stored in an upper cassette 18 or a lower cassette 19, each of which has a half-moon paper feed roller 20.
21 sent to the plane. At this time, the timing is adjusted by the register roller 22 so that the leading edge of the electrostatic latent image on the photosensitive drum 2 and the leading edge of the transfer paper coincide at the transfer part B. The toner image on the photosensitive drum 2 is transferred onto the transfer paper. After the transfer is completed, the transfer paper is separated from the photosensitive drum 2 at a separating section C, guided by a conveyor belt 23 to a fixing roller 24, and fixed by pressure and heat. After fixing, the paper is discharged by the discharge roller 25 via the paper detection sensor 26 to the sorter 29 through the conveyance path 28 when using a tray or a sorter. After the transfer, the photosensitive drum 2 continues to rotate, and its surface is cleaned by a cleaning device 30 composed of a cleaning roller and an elastic blade, and the toner proceeds to the next cycle, and the collected toner is collected in a discharge toner container 31. .

Next, various detectors will be explained.

Reference numerals 32 and 33 indicate paper-out detection lamps for the upper cassette and lower cassette, respectively, which are arranged at positions that illuminate the CDs 534 and 35, and the presence or absence of transfer paper can be detected by a well-known technique for determining resistance changes of the CDs 534 and 35. Further, in this embodiment, the lamps 32 and 33 are controlled so as to illuminate only when the upper and lower cassettes are inserted into the copying machine 1, respectively. 36 and 37 are size detection switches for the upper cassette and lower cassette, each consisting of a set of 4, and when the size recognition cam attached to the cassette presses the selected switch, the operating section shown in Figure 2 is activated. The display 119 inside outputs eight types of size data and the presence or absence of a cassette.

38 is a switch that generates a signal when the manual feed lid is used. To perform a single copy, press the upper
Manually feed the sheet into Copy@1 through the lid of No. 18,
Paper feed roller 20. This is done by sharing the registration roller 22.

A switch 39 detects the presence or absence of toner in the developer hopper. A switch 40 detects an overflow of toner in the discharged toner container. A switch 41 connects a disk rotating in synchronization with the main motor 3 and a photo interrupter 42. Drum clock pulses generated by a drum clock pulse generator that generates pulses in combination are used as a reference for sequence control of the reproduction machine.

Reference numeral 43 denotes a first mirror to which an illumination lamp 7 and a first scanning mirror 6 are attached, and it moves back and forth in the directions of arrows and E on an axis (not shown) to perform optical scanning. Photo-interrupter shielding plates 45, 44, for determining the feeding timing and registration timing of the transfer paper, respectively.
And photo interrupter shielding plates 47 and 49 are attached for determining the stop position of the first mirror. Further, the second mirror 8 is provided with a photointerrupter shielding plate 4 for detecting the position of the second mirror 8 during full-size copying and reduced copying.
8 is installed. The photointerrupter shielding plate is hereinafter abbreviated as a Pi plate.

A photointerrupter 49 detects the passage of the Pi plates 44, 45, and 46, and has an LED and a phototransistor facing each other.

A photointerrupter 51 detects the position of the Pi board 47 and is of the same type as the photointerrupter 49.

50 and 52 are photo interrupters that detect the position of the Pi board 48, and are of the same type as the photo interrupters 49 and 50. Upon detection of the Pi plate 48, the photointerrupters 50 and 52 output signals indicating that the second mirror 8 is at the same-size copying position F and the reduced-size copying position G, respectively.

Hli indicates the same magnification copying position and the reduced copying position of the lens 9, respectively. 58 is a switch that detects opening/closing of the cover of the copying apparatus.

A switch 59 is provided at the entrance of the sorter 29 and detects passage of copy paper.

60 is a conveyor belt in the conveyance path 28 that guides the copy paper to the sorter 29, and 61 is a copy paper feed roller disposed at the entrance of the sorter 29.

Reference numeral 56 denotes a main switch, which can be opened and closed manually, and can also be turned off by inputting an electric signal to a remote coil. Reference numeral 62 denotes a key counter (total counter for each operator), which in this embodiment is equipped with a short bar circuit for detecting insertion into a socket. 63 is a total counter for the number of copies.

Next, the operating section of one embodiment of the present invention will be explained with reference to FIGS. 2 and 3.

In the figure, 115 and 116 are keys for selecting the upper and lower cassettes, respectively, 114 is a slide lever for setting copy density, and position 5 is the standard density. 105 is the numerical value and key for setting the number of copies, 106 is the key to cancel the numerical value, and 1102 is the key 10.
5 is an interrupt key for copying another number before the copying of the set number is completed; 104 is a copy key for instructing the start of copying; 101 is a key for stopping the copying operation during continuous copying of the set number. This is a stop key for The stop key 101 is also a command key for canceling the mode when interrupt is selected using the interrupt key 102. 122
Reference numeral 121 denotes a selection key for the same-size copy mode, and 121 its indicator, which lights up during the same-size copy mode. 128 is a selection key for reduction copy mode, and the reduction rate in reduction mode is 0.67.
It is. Reference numeral 127 indicates a display corresponding to the key 128, which lights up during mode selection. Reference numerals 117 and 118 display the cassettes selected by the upper and lower cassette selection keys 115 and 116, respectively, and 119 displays the type of cassette loaded in the selected stage.

111 is a display indicating that interrupt mode is in progress; interrupt key 102
It lights up when is selected, and goes off when interrupt copying is completed or when the interrupt mode is canceled with the stop key 101. Reference numeral 108 is a key counter confirmation indicator that lights up when the key counter is not inserted into the socket of the main body. 109
1 is a discharged toner indicator, which lights up when the discharged toner container shown at 31 in FIG. 1 is full of toner and the resensor 40 detects toner, and turns off when the discharged toner is removed from the container. 11
0 lights up when no cassette is inserted into the cassette stand selected by the paper/cassette replenishment indicator or when the paper in the cassette set on the cassette stand runs out. Reference numeral 112 denotes a toner replenishment indicator, which lights up when the amount of developer in the developing device 16 falls below a specified amount. Reference numeral 113 is a paper feed check indicator that lights up when copy paper is jammed inside the machine or when paper is jammed in the attached sorter 29. 103 is a wait display, and when the main switch 56 is turned on, the temperature of the fixing heater is lower than the specified value 1. %, it flashes and turns off when the temperature exceeds the specified value and the up process is completed.

Reference numeral 107 indicates the number of copies per copy, and when the desired number of copies is set using the numeric keypad 105, the number of copies to be set is displayed in two digits with seven segments, and it is possible to set from 1 to 99 copies at a time. Also, when the clear key is pressed, 1 is similarly displayed. Furthermore, when the interrupt key 102 is pressed, the number of copies is displayed 10.
7 displays l instead of the number of sheets that was displayed up to that point, then displays the set number of sheets by manual key operation during the interrupt mode, and when the interrupt mode is canceled, the set number of sheets immediately before entering the interrupt is displayed again. indicate.

FIG. 3 shows a control block diagram in the embodiment described above.

Reference numerals 201 and 202 refer to a sequence CPU 2 and a management CPU, respectively, which mainly read the operating section keys and cassette size from the key matrix circuit 204, drive the operating section display circuit 203, and detect inputs such as copy keys. Sequence CPU2
A copy command is output to 01.

On the other hand, the sequence CPU 201 receives the copy command (a 4-bit signal indicating the document scanning width, paper feed stage designation, and magnification ratio) and supplies a signal to the optical system setting circuit 204 to set the optical system to a desired magnification. A signal is also given to the image forming drive circuit 206 to start an image forming sequence involving various exposure circuits, motor drives, high voltage power supply drive circuits, etc.

! FIG. 4(a) is a flowchart of the sequence CPU 201, and the control flow passes through the stand-in and input unit 301, and reaches step 302. In step 302, the fourth
As a result of the 0 determination for determining the copy command generated in the copy command routine 318 of the control flow of the management CPU 4 202 shown in FIG. Step 30
In step 3, the previous state of the copying machine is compared with the desired mode, and if the state is different from the already set state, control is advanced to an optical system setting routine 304 to set the desired mode. In 304, depending on whether the desired mode is the reduction mode or the same magnification mode, the in-mirror lens 9 and the second scanning mirror 8 are moved to set the desired mode. The control further proceeds to the image forming routine 305, and the above-described sequence from 302 to 305 is repeated until the determination step 302 determines that the copy command of the copy command routine 316 is to be reset.

On the other hand, a flowchart of the management CPU 202 is shown in (b).

The initial setting routine 307 is a routine that starts execution when the CPU is started or when the reset switch is pressed, and is a routine that sets the number of sheets to 1, sets the reduction ratio to 1x, and selects and sets the lower paper feed.

308 is a subroutine executed to set the copy mode when the power is turned on. The job executed by this auto-reset subroutine 308 is to set the copy mode selected by the user in advance on the management CPU. These will be explained in detail later.

309 is a step for determining whether the next main switch of the auto-reset subroutine 308 is ON (whether or not the sequence CPU is ON); when the determination result is No, step 3 is executed.
Return to 08. If Yes, control step 3
10, the sizes of the transfer materials stored in the upper cassette 5) 18 and the lower cassette 19 are detected by the size detection switches 36 and 37.

311 is a number key 105, a clear key 106, an interrupt key 102, a stop key 101, and an upper/lower selection key 11.
5, 116, the same size key 122, and the reduction key 128. If the key force is determined in step 312, the routine branches to step 313 and sets an auto-reset timer. On the other hand, if there is no key human power, the process branches to step 314, and it is determined whether the timer set in step 313 counts and the count ends. If the time is up, the process branches to 315 to execute the same subroutine process as described above, and presets the desired copy mode by auto-resetting in the management CPU. It is also possible to make the time until the key sense routine auto-resets variable by allowing the key sense routine to select from several different times using a switch.

Step 316 is a routine that outputs a copy command to the sequence CPU when there is human power on the copy key, and resets the input copy command of the stop key when a predetermined number of copies has been completed.

327 is a dynamic routine, 307 to 316
This routine lights up the display on the operation unit in response to the display data set by the management CPU.

Each routine (step) from 309 to 327 passes control each time it is copied, and the data displayed by routine 327 is displayed according to the status. Step 308
The subroutine executed in step 315 first reads the reset mode set by the user in reset mode reading step 317, as shown in FIG. 4(c) 8.
In the embodiment, the setting circuit 207 is read at U.
It consists of a bit switch array, and a 1-bit switch is used to set whether it is a full size copy or a reduced copy. In addition, the number of cassettes can be set up to 8 using a 3-bit switch, and the specified cassette can be set to 4 of 8 types as shown in Fig. 2 119.
bit (one bit specifies the cassette stage)
It can be set using the switch.

In step 318, it is determined from the data read in step 317 whether the magnification setting is normal magnification or reduced mode, and if the setting is different from the current setting state, the determination is made Yes and the control is advanced to magnification setting 319. If step 318 determines that the desired mode is the same as the current mode, control advances to step 320. Step 319 sets a desired mode and controls one display on the display 121 or 127.

Step 320 determines the number of copies to be preset by the reset, and if the desired number has been set, control proceeds to step 321, where the number of copies and display data are set on the display 107. On the other hand, if the number of sheets to be set at the time of reset is not designated, control branches to step 322.

In step 322, it is determined whether or not the cassette stage is specified by the reset mode setting circuit 207, and if the cassette stage is specified, the control branches to step 326,
Display and set the set row. If there is no row designation, it is determined in step 323 whether or not size E9 is designated by the 3 bits of the setting circuit 207, and if there is no designation, the subroutine processing is terminated and the process exits to the main routine.

On the other hand, if the size is specified, the process branches to step 324, and it is determined whether the specified size cassette is stored in the upper or lower tier, and if it is not stored in either, step 32
Branch to 5 and specify the lower stage.

As described above, according to the present invention, the user can arbitrarily set the auto-reset mode, so it is possible for each user to use the most frequently used copy mode without having to set the copy mode. becomes. Therefore, the user can omit the trouble of setting the mode each time a copy operation is performed, and the present invention can provide a copying machine with significantly improved operability.

[BRIEF DESCRIPTION OF THE DRAWINGS] 1 0 Fig. 1 is a side view of an embodiment of the copying machine according to the present invention with the side plate removed, and Fig. 2 is an implementation of the operation section of the copying machine according to the present invention. 3 is a block diagram showing a control block of an embodiment of the copying machine according to the present invention; FIGS. 4(a) to 4(c) are flowcharts for explaining the control flow of the CPU. . Patent applicant: Canon Co., Ltd. 2 Figure 4 (/X)

Claims (5)

[Claims] (1) A copying machine having a return function, characterized in that the copy mode set by the return can be selected. (2) The copying machine according to item 1, wherein the copying machine is automatically reset when the power is turned on. (3) The copying machine according to item 1, wherein the copying machine is reset by a reset operation. (4) The copying machine according to item 1, wherein the copying machine automatically returns after determining a predetermined length of continuous non-operation time. (5) The copying machine according to item 4, wherein the length of non-operation time is variable.