JPS6180172A - Image forming device - Google Patents

Abstract

PURPOSE:To decrease the number of parts and to eliminate the laboriousness of operation by making common use of one key as a key for selecting paper feed cassettes disposed in two upper and lower stages and a key for selecting paper sizes. CONSTITUTION:A paper size selecting button 61 is provided in a paper feed cassette selecting part 60 so that modes are successively changed over to the upper cassette selecting mode, APS mode (automatic paper selecting mode) and lower cassette selecting mode. The upper cassette is selected and an upper cassette feed routine is started when the operator pushes the button 61 after throwing a power source. A lower cassette feed routine is similarly started when the operator pushes twice the button. The corresponding paper according to the original and the magnification selected by a magnification change button 53 is selected from the upper of lower cassette when the APS mode is selected. The change-over of the operation is thus made possible with the same key and therefore the operating efficiency is improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image forming apparatus, and in particular, it is possible to select two upper and lower paper feed cassettes with a single key, and automatically select paper feed cassettes according to the document and magnification. The present invention relates to an image forming apparatus that can perform selection.

[Prior art]

A 1iii image forming device that can obtain a copy image (t) that has a predetermined magnification relative to the size of the original image;
Particularly in electrophotographic copying devices, the
A key is provided to set a specific copy image magnification, and a two-tier paper cassette (top and bottom) is used to feed the paper in the two-tier paper cassette (upper and lower) loaded with the paper to be used. Use the paper size selection key to select either one of them, and select the required paper size depending on the original and magnification ratio to feed the required paper size from the two-way set, and also select the required paper size from the two-way set. If the paper size is not "INN" in any paper cassette, select the paper by pressing either the corresponding paper size key or the automatic paper selection key whose ED blinks. However, in any conventional image forming apparatus, there are keys to select the upper and lower paper feed ports, and as described above, there are keys to select the upper and lower paper feed ports, and as described above, there are keys to select the paper feed ports, Since the automatic paper selection key for selecting the correct paper was provided separately, the operator had to press one of the keys placed at a predetermined interval on the operation panel. This makes the operation complicated, and space for both keys must be secured on the panel of the operating section, resulting in a disadvantage that the operating section itself becomes large.

[Purpose of the invention]

This invention eliminates the drawbacks of the conventional paper feed cassettes, reduces the number of parts, and eliminates the complexity of work by using the selection keys of the conventional two-stage upper and lower paper feed cassettes as automatic paper selection keys. Furthermore, it is an object of the present invention to provide an image forming apparatus in which the space for an operation section can be reduced.

[Structure of the invention]

The present invention is an image forming apparatus capable of copying an original at a predetermined magnification, and includes a key for selecting paper feed cassettes arranged in two upper and lower stages, and a paper size selection based on the original and the set magnification. It has a configuration in which a control means is provided to allow one key to be used for both functions.

(Example of the invention) Embodiments of the invention shown in the drawings will be described below.

FIG. 1 shows the general arrangement of an electrophotographic copying apparatus, which is a type of image forming apparatus.A document glass stand 2 is placed 8QW on the top surface of the main body 1, and an original glass table 2 is placed on the top surface of the document glass table 2. A platen cover 3 whose upper surface can be opened and covered is provided.

At the internal upper part of the main body l, there is an exposure lamp 4 that irradiates light onto the lower surface of the document glass table 2, and a light reflected from the document irradiated by the exposure lamp 4 is transmitted to an exposure section 6 via a group of reflectors 5. , and a lens group 7 that is movable in the horizontal direction (in the direction of the arrow), and a drum-shaped photoreceptor drum 8 that is an image carrier is rotatably provided in the center. A charging device 9 is provided near the top of the drum 8 and facing it, and an exposure section 6 and a developing device l are provided in front of the charging device rL9 in the rotational direction of the photosensitive drum 8.
An O2 transfer device 11, a separation device 12, a removal device 13, and a cleaning device 14 are arranged close to and facing the photosensitive drum 8, respectively.

Two upper and lower cassette cases 15.16 are removably installed in the lower part of the main body 1, and when each cassette case 15.16 is inserted, the first of the stacked sheets of paper is inserted into it. Paper feed rollers 17 that come into contact with the upper surface of the upper sheet are respectively provided, and between the vicinity of the paper feed rollers 17 and the vicinity of the transfer device 11 is located one of the cassette cases 15 and 16. A paper feed path 18 is provided for conveying the paper to the transfer device 11.

A portion of the guide plate constituting the paper feed path 18 is cut out, and a pair of upper and lower registration rollers 19 are disposed in this cutout portion.

A fixing device 2° is provided on the other side of the lower part of the interior of the main body 1, and a paper conveyance path is provided between the fixing device 20 and a branch l' device 12 provided near the photoconductor tram 8. 21
A paper section 22 is provided on the opposite side of the transport path 21 of the device, and a paper discharge tray 23 is provided outside of the paper section 22.

The system 1111 of the above-mentioned electrophotographic copying apparatus is as shown in FIG. Reference numeral 31 is an automatic paper selection function section, which is a yellow band provided on the lower surface of the platen cover, and an APS sensor board that outputs an analog voltage proportional to white to the control board, and reference numeral 32 sets the final 4 degrees of the copied image. The MS sensor 134 for EE sensor board 33 for enlargement and 11h for small is composed of non-volatile memory, and when the power is off, PM count number, PM setting number, color count, APS base value, bias A memory W board 35 for storing shift values, etc. outputs the input of each setting key to the control board 30 via a matrix circuit, and
The above system? 111 is an operation unit (OB) that lights up the display element in response to a signal from the board 30, 36 is a temperature detection board, 37 is an AC driver base heat resistance, and 38 is an AC negative.

39 is a DC load, 40 is an optical motor, and 41 is the side tIIl.
- Optical morph control i11 board (M2/CB) for controlling OFF, rotation direction, and rotation angle, 42 is DC1a unit/to.

When obtaining a copy image using the electrophotographic depiction device configured as described above, first, the original is placed on the original glass table 2, and then the platen cover 3 is used to rotate the original by 1 ffl. = Operate the operation panel 50.

This operation panel 50 is constructed as shown in FIG. 3, and when the number of copies is selected using the numeric keypad 51, the selected number of copies is displayed on the ED 52.

Further, 53 is an MR button for switching between reduction and enlargement modes, and in the initial state when the power is turned on, l:
If you set it to the same magnification of l and press - times, the upper part,
That is, set the enlargement mode to enlarge the A4 size to 84 size, and press the button again to enter the AMS mode, that is, the mode in which the original is made to a size corresponding to the paper in the selected paper cassette, which will be described later, and press the button again. Press this button to enter the first reduction mode, press it again to enter the second reduction mode, press it again to set the initial magnification to the same magnification, and when each mode is set, The corresponding LED 55 lights up, and in the AMS mode, the "auto" 54 lights up.

Therefore, by simply pressing the MR button 53, the image can be enlarged.
The desired magnification can be selected by switching between auto, first stage reduction, second stage reduction, and same magnification.

Further, 56 is a zoom button, and by pressing the enlarge button or reduce button of this zoom button 56, the magnification can be changed in the range of 0.65 times to 1.55 times in steps of 0.01 times. , the contents when the MR button 53 in the enlargement/reduction mode is pressed and when the zoom button 56 is pressed, ie, $8, are displayed on the magnification display D57.

Reference numeral 60 denotes a paper feed cassette selection section, and the station section 60 has an size selection button 6I for selecting the paper feed cassette i1. Nananol
- Selection mode, lower cassette stack mode, and PS mode (automatic paper selection mode) can be switched in sequence.

Note that the APS mode is a mode that automatically reads the size of the original placed on the original glass table 2 and selects copy paper that matches the size of the original after copying. Even if the original is the same, the selected copy paper is different when copying at the same magnification and when copying at variable magnification (1:5).

When one of the upper cassette selection mode, lower cassette selection I-shaku mode, or PS mode is selected, the LrED62 corresponding to that mode lights up. The size LED 63 displays the selected size.

65 is a density selection unit for changing the density of the copied image by changing the bias of the developing device 10; when the power is turned on, the manual mode is selected; therefore, any density selection button 66 is selected. By pressing one button, you can select from 7 levels /m degree, the LED 67 corresponding to the selected concentration level lights up, and by pressing the E button (automatic concentration selection button) 68, you can select the Mayual mode. Automatically selected once from IJ1. The mode is switched and the LED of the EE button 68 lights up.

In addition, 59 is a copy start button, and 70 is a shape display section, and this status display section 70 indicates each operation such as power supply, jam, paper replenishment, toner 1f11 lining, periodic inspection, and thick paper fixing by blinking an LED 71. This is what is displayed.

When performing a copying operation by using the operating section 50 configured as described above, first, each copying condition is set. The set number of copies is displayed on the number display LED 52, and the magnification of the copy image relative to the original is determined by operating the magnification selection section 58. If you want to obtain a copy image of the same size, you do not need to operate the MR button 53.For example, if you want to select ``auto'' and set the normal size, press the MR button 53 twice. For example, after moving to magnification mode, it changes to AMS mode and the auto L
ED54 lights up to notify that this has been selected.

Note that the AMS mode means that 13
A selection mode that automatically reads the 1TL original size) and sets the image size scaling ratio to match the selected copy paper size), and corresponds to the selected size. When there is no copy paper in the cassette case, the LED of the corresponding copy paper size is lit.

The flowchart for selecting the magnification is shown in FIG. 4, and since the equal magnification flag is selected in the initial shape, by pressing the MR button 53, you can check whether the equal magnification flag is selected or not. Since the 1x flag has been selected, the selection is switched from the 1x flag to the enlarged flag and the enlarged copy mode routine is started. Therefore, pressing the MR Pokun 53 again will switch to AMS mode. flag is selected and the AMS mode routine is started.

Therefore, other modes, ie, first-stage reduction mode,
The second reduction mote is also selected in a similar manner and its respective routines are started.

When the AMS mode is selected, a copy image is obtained according to the flowchart shown in Fig. 5. In other words, the size of the paper in the paper cassette is selected before selecting the AMS mode. Therefore, when AMS mode is selected, the size of the original is detected and the reduction or enlargement ratio, that is, the scaling ratio, is automatically set, and by pressing the copy start button 59, a copy image that matches the paper size is obtained. It is now possible to

In addition, in order for this AMS mode to operate, A, which will be described later, is required.
The condition is that the PS mode (automatic paper selection mode) is not selected.

Furthermore, when a mode other than the AMS mode is selected in the magnification selection section 58, all paper sizes including the APS mode can be selected in the paper cassette selection section 60, and the APS mode is selected when the power is turned on. At the same time, pressing the G size selection button 61 switches from the APS mode to the upper cassette selection, and further pressing the paper size selection button selects the lower cassette from the upper cassette. , corresponding LED
62 lights up, and the one-size-fits-all LED 63 also lights up.

A flowchart for selecting this paper feed cassette is shown in FIG. 7. When the paper size selection button 61 is pressed after the power is turned on, since the APS flag is selected, the upper cassette is selected and the paper feeding routine for the upper cassette is started. started,
Similarly, when the button is pressed twice, the lower section 71 to paper feed run starts.

A flowchart when the APS mode is selected is shown in FIG. 6, and the APS mode is a mode in which the paper size is automatically selected based on the original and the magnification selected by the magnification selection section 58, If the paper corresponding to the selected paper size is not loaded in either the upper cassette or the lower cassette, the LE of the corresponding paper size
D blinks to notify the operator of the required paper size.

In addition, the numeric keypad 51 has a double function, and when each key is pressed individually, the numerical value written on the top of each key is manually entered as the set number of copies, and that numerical value is displayed on the number of copies display LED 52. However, if you press one of the keys whose functions are written on the bottom while pressing the P key, the content written on the bottom of each key will be performed. '' key to fix thick paper. This is used when setting the fixing temperature for thick paper. As the fixing temperature increases, the cardboard fixing LED on the display lights up.

Also, if you press the rPJ key and the "8" key, the i! It can be used when copying other originals during U copying, and interrupt copying is set when the copying at the time of pressing is completed.Also, pressing the rPJ key and the "7" key activates the image software. It is used when forming a binding margin, and the leading edge of the image is shifted backward by about 10 mm.

Also, when you press the rPJ key and the "5" key, the PM counter number, that is, the number for one periodic inspection, lights up on the number display LED 52, and the setting value can be changed in the direction described later. can do.

Furthermore, various functions can be issued by pressing the rPJ key, and the operation is the same as the 8th key.
As shown in the flowchart of the figure.

Setting and changing the value of the PM counter is performed as follows.

First, if you turn on the power while holding down the "2" and "5" keys, the PM cycle (maintenance cycle) setting will be different, and the magnification display LED 57 will show rPJ rOJ.
Since rOJ is displayed, pressing the zoom button 56 changes the display to rPJ r2J r7J.

At this time, if the PM counter has already been set to a value of 32,000, the LED 52 for displaying the number of sheets
r3J rOJ is displayed, so you can see that the PM cycle in 10,000 units is set to "3", and if you enter "2" using the numeric keypad 51, the sheet number display LE will be displayed.
r3J r2J is displayed on the D52, and then when the copy start button 59 is pressed, the display changes to "2" and "2", which allows you to know that the setting of the unit of 10,000 as "2" has been completed. can.

Then, if the zoom button 56 is used to display the double image and ED57 is set to rPJ r2J r8J,
This time, it is possible to manually print in thousands, and it is used to display the number of sheets.ED5
2 will display r2J [OJ, so for example, if you press "5" on the numeric keypad, the display will be r2J.
r5J, and when you press the copy start button 59, the display changes to "5" and "5", meaning that the PM cycle previously set to 32,000 has been changed to 25,000. These operations are shown in Figure 9. It becomes like a flowchart.

Therefore, when the number of copies reached between 24,000 and 24,999 by performing normal copying operations from the time this operation is completed, the periodic inspection display on the display unit 70 lights up, and
When the value exceeds 25,000, the display blinks, thereby informing the necessity of periodic inspection, and this flowchart is shown in FIG. 1O.

Also, if you want to change the counter settings for total copy, use r2J r5j on the numeric keypad as in the previous case.
After turning on the power while pressing , use the zoom button 56 to set the magnification display LED 57 to rPj r3J.
If you set it to r2J, you can change the value of the child unit in the same way as above, and rPJr'3Jr3J sets it to 10,000 units, rPJ l"3
J rdJ: Thousands, rPJ r3J r5j in hundreds, rPJr3J r6J in thousands, and rPJ
It is possible to set the − level with r3j “7”.

It is also possible to reset/reset the total copy value of the PM count in one operation.

That is, if you turn on the power while holding down r4J or r7J on the numeric keypad 51, the counter reset mode will be entered, and the display will be changed to rPJ using the zoom button 56.
If the copy start button 59 is pressed after setting r9J rob, the counter value becomes 0, and the flowchart in this case is shown in FIG.

By changing the value of the total copy counter in this way, if the inspection is performed before the regular periodic inspection, the periodic inspection will be performed when the set value of the PM counter is reached based on the number of copies from that point onwards. Since the display is carried out, the state of use is always properly maintained.

〔Effect of the invention〕

By configuring this invention as described above, it is possible to select the upper and lower two paper feed cassettes and select the automatic paper selection 1-length mode with a single key. The operator only has to press the same key, which improves work efficiency, reduces the number of parts, and also reduces the area required for the operation section. It is something that you have.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a general schematic diagram of an electrophotographic back copying apparatus, FIG. 2 is a block diagram showing the entire control system of the one shown in FIG. 1, and FIG. 3 is a diagram showing a display section. , Fig. 4 is a flowchart showing magnification selection, Fig. 5 is a flowchart in AMS mode, Fig. 6 is a flowchart in APS mode, Fig. 7 is a flowchart showing paper feed cassette selection, Fig. 8 is a double numeric keypad A flowchart showing the function function, Fig. 9 is a flowchart when storing the PM counter setting contents in the memory board, Fig. 10 is a flowchart showing a comparison between the PM count setting value and the number of copies, and Fig. 11 is a flowchart showing the PM counter setting contents and the number of copies. 3 is a flowchart illustrating resetting a counter. 1... Body 2... Original glass stand 3... Platen cover 4...
Exposure lamp 5...Reflector group 6...
...Exposure section 7...Lens group 8...
...Conductor drum 9...Charging device lO
・・・・・・Developing device 1 piece・・・・・・Transfer device
12... Separation device 13... Static eliminator 14... Cleaning device 15.16... Cassette case 17... Paper picking roller 18... ...Paper feed path 19...
Registration roller 20...Fixing device 2...Conveyance path 2
2...tJj is the pressure part 23...
... 1 non-male tray 30 ... control board 31 ... automatic selection function section 32 ... EE sensor base (reverse 33 ... MS sensor 34 ... ...Memory board 35...Operation unit 36...Temperature detection board 37...AC driver 38)
AC load 39...DCfL load 40...
...Optical motor 41...Optical motor control board 42...DCM source unit 50...
・Operation panel 51・Old...Numeric keypad 52...
・Number of sheets display LED 53...MR Bokun 54...Auto 5
5.62.67...LED 56...Zoom button 57...Magnification display LED 59...Copy start button 60...Paper feed selection Part 6E...Paper size J5! Selection Botanoro 3...
・Gi size LED 65...4 degree selection part 66...rQ degree selection box 68...EE button 7o...state tfu display department agent patent attorney Middle trunk (habit) Figure 6 Figure 5 Figure 9 Figure 10

Claims (1)

[Claims] This is an image forming device that can copy originals at a predetermined magnification, and includes keys for selecting paper feed cassettes arranged in two upper and lower stages, and keys for selecting paper size based on the original and set magnification. 1. An image forming apparatus characterized in that a control means is provided for allowing one key to function as both functions.