JPH02171773A - Image forming device - Google Patents

Abstract

PURPOSE:To precisely judge a service fee corresponding to size by storing fee data for each size into a storage means, displaying it on a display part and making it rewritable. CONSTITUTION:Simultaneous as a paper feed cassette is selected through a cassette selection key 59, a storage area in a storage device is set in response to the selected cassette. To alter a copying fee displayed on a liquid crystal display part 62, followed by the key-in of an information key 63, a fee corresponding to the size selected by the cassette selection key 59 is designated. Thus, a copying fee can be readily altered, and moreover data on a desired copying fee can be precisely grasped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to the determination of charges according to the number of images formed in an image forming apparatus such as a copying machine.

(Prior art) Conventionally, for example, in image forming apparatuses such as copying machines,
As disclosed in Japanese Patent Publication No. 82854, there is a system that allows the user to select a plurality of sizes of copy paper and form an image that suits the user's purpose. When copying using such a copying machine, a fixed fee is charged for each copy sheet of any size.

However, in reality, usage fees vary slightly depending on the size of the copy paper.

Conventional copiers did not count and store the number of copies made for each copy paper size, but instead counted the total number of sheets fed by each paper feed section, so the fees that should have been paid were Therefore, more fees were to be paid by the users.

These techniques were also applied to other image forming apparatuses.

(Problems to be Solved by the Invention) As described above, conventional image forming apparatuses count the total number of sheets fed by each paper feeding device and use it to calculate the copying fee. It is impossible to know the actual number of sheets fed, and as a result, it is not possible to clearly determine the usage fee corresponding to the actual number of times the sheet feeding device is used, that is, the size of the image forming material.

In order to eliminate the above-mentioned drawbacks, the present invention provides an image forming apparatus that is capable of easily and accurately knowing the number of uses for each paper feeding device, and calculating usage fees by size during image formation, which can be input and set as appropriate. The purpose is to provide

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention provides an image forming apparatus capable of feeding image forming materials of a plurality of sizes and forming images on each of the materials. A storage means for storing price data for each size of image forming material; a reading means for reading out the data stored in the storage means; a rewriting means for changing the data read by the reading means; and the reading means. An image forming apparatus is provided, characterized in that it has a display means for displaying data read out by the image forming apparatus.

(Function) In the device configured as described above, data for each size of image forming material related to image formation is stored in the storage means.

The contents stored in the storage means are read out by the reading means and displayed on the display section, and the read data can be rewritten by the rewriting means.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a schematic cross-sectional view of a copying machine according to an embodiment of the present invention. A copying machine main body 1 (hereinafter referred to as main body 1) is provided with a document table 2 on the top surface, and an operation panel PA is provided in front of the document table 2.

Further, an upper paper feed device 3 and an upper paper feed device 4 are provided at the lower right of the main body 1, and an upper paper feed cassette 3A and an upper paper feed cassette 4A are attached to the right of each. The cassette cover of the upper paper feed cassette 3A serves as a manual paper feed tray 5A for manually feeding the transfer paper 7 as appropriate. Here, a manual paper feed device 5 is configured which feeds paper using this manual paper feed table 5A. A paper discharge tray 6 is attached to the left side of the main body 1. A photosensitive drum 7 is disposed approximately in the center of the main body 1. Around the photoreceptor drum 7, a charging device 8.degree. optical system 9. Developing device 10. Transfer charger 11. Charger for peeling 12. A cleaning device 13, a static elimination lamp 14, and the like are sequentially arranged.

At the bottom of the main body 1, there are copy sheets P2 automatically taken out from the upper paper feed cassette 3A via a pickup roller 15,
Copy paper P3 automatically taken out from the upper paper feed cassette 4A via the pickup roller 16 and the manual paper feed tray 2A
A copy paper transport path 17 is formed that guides the copy paper P1 manually fed from the photosensitive drum 7 and the transfer charger 11 to the paper discharge tray 6. A paper stop switch 18. A registration roller 19, a heat roller 20, and a paper discharge roller 21 are arranged in this order. Here, the details of each paper feed cassette and each device from the manual paper feed tray 5A to the registration roller 19 will be explained later.

The optical system 9 includes an exposure lamp 23. whose back part is surrounded by a reflector 22. It has a configuration including mirrors 24 to 29 and a lens 30.

Here, the photosensitive drum 7 is driven by a drive mechanism (not shown) in the direction of the arrow a in the drawing in synchronization with the optical system 9. First, the photoreceptor drum 7 is uniformly charged by the charger 8 . Next, light is uniformly irradiated by the exposure lamp 23, and a reflected light image of the document is formed on the photoreceptor drum 7 by the optical system 9. This image is an electrostatic latent image. The formed electrostatic latent image is developed into a toner image by one developing device and sent to the transfer charger 11 side.

On the other hand, copy paper P1, P2, or P3 (hereinafter referred to as copy paper P) supplied automatically or manually is supplied by a registration roller 19 whose paper stop switch 18 is synchronized with the photosensitive drum 7. The above-described toner images are transferred onto these copy sheets P by the transfer charger 11. The copy paper P onto which this toner image has been transferred is peeled off from the photoreceptor drum 7 by a peeling charger 12, passes through a copy paper conveyance path 17, and is passed through a heat roller 20.
be led to. Here, after the transferred toner image is melted and fixed, the copy paper is transferred to a paper ejection tray 6 by a paper ejection roller 21.
is discharged to.

On the other hand, after the toner image is transferred onto the copy paper P, the residual toner remaining on the photoreceptor drum 7 is cleaned by the cleaning device 13, and the residual image on the photoreceptor drum 7 is erased by the static elimination lamp 14. It is prepared for copying operations.

Inside the main body 1, an upper frame and a lower frame (not shown) are pivotally supported at one end via a support shaft (not shown), and the other ends of both frames are opened at a desired angle, for example, about 30 degrees. It is configured so that it can be used. As described above, the upper frame includes the photoreceptor drum 7 and the charger 8 for charging around the photoreceptor drum 7. Optical system 9. Exposure lamp 23. Each device, such as a developing device 10, a cleaning device 13, and a static elimination lamp 14, is attached by appropriate means. Furthermore, a document table 2 and a pickup roller 15 of the upper automatic paper feeder are mounted on the upper frame. Feed roller 31 and separation roller 32
and the manual feed roller 33 of the manual paper feeder 5 are attached to constitute an upper unit 1A. The lower frame includes an upper paper cassette 3A, a lower paper feed cassette 4A, a feed roller 34, a separation roller 35. Transfer charger 11.
Charger for peeling 12. Heat roller 20. Paper ejection roller 21
Each mechanism such as the paper discharge tray 6 is attached by appropriate means to constitute the lower unit IB.

After rotating and removing the flown cover (not shown) of the main body 1, the copy paper P is almost removed through the case opening/closing device (not shown).
It is configured so that it can be opened and closed along the copy paper conveyance path 17.

FIG. 3 shows the above-mentioned operation panel PA, and the upper right cloth block in the figure includes an interrupt key 50 for setting an interrupt mode for interrupt copying, a preheating key 51 for preheating the main body 1, and each transport A counter key 52 is provided to display the number of sheets fed by the paper roller. To the left of the counter key 52 is provided a lamp section 53 that displays the status of the main body 1 using a lamp, and to the left of this lamp section 54 is a number display section 54 that displays the setting of the number of copies. Each is provided. A copy key 55 for executing a copying operation is provided below the preheating key 51, and a numeric keypad 56 for setting the number of copies, etc. is provided to the left of the copy key 55. To the left of the numeric keypad 54 is installed a density setting section 57 for setting the copy density. To the left of this density setting section 57 is a color selection key 58 for selecting a copy color. Cassette selection key 59 for selecting a paper feed cassette. An enlargement/reduction key 60 for setting an enlargement mode and a reduction mode and an equal-size key 6 for setting an equal-size mode are provided.

To the left of these keys, there is a liquid crystal display section 62 that displays the operating status, etc., and an information key 63 that reads data on the normal mode and copying charges corresponding to the copy paper size from a storage device to be described later. and is provided.

Here, when a paper feed cassette is selected using the cassette selection key 59, a 3i2 storage area in the storage device corresponding to the paper feed cassette is simultaneously set, as will be explained later.

Further, the cassette selection key 59 is used to designate a fee for each size when changing the copy fee displayed on the liquid crystal display section 62 in response to the input of the above-mentioned information key 63.

When paper is fed from the manual paper feeder 5, the storage area is not set by pressing each of the above keys, but the copy paper P
A storage area is set when a manual feed switch (to be described later) detects a copy sheet P1 when copy sheet P1 is inserted.

Next, details of each of the paper feeding means will be explained.

The mechanisms described above will be given the same reference numerals to avoid redundant explanation. As shown in Figure 4, as a paper feeding means,
From top to bottom: manual paper feeder 5. A main paper feed device 3 and a sketch paper device 4 are provided. Each of these paper feeding devices is provided with the copy sheets PI, P2 and P of the appropriate size for use.
3 is supplied.

Furthermore, the top picture paper cassette 3A and the bottom picture paper cassette 4A are
It is a cartridge type that can be freely attached to and removed from the main body 1, and has an efficient configuration when changing the size of copy paper or when replenishing copy paper P2 (or P3). Copy paper transport paths that guide each of the copy sheets Pi, P2, and P3 to the registration rollers 19 are formed individually. Copy paper P2
The copy paper transport path 8A (hereinafter referred to as transport path 8A) of the transport path extends from the manual feed roller 33 to the feed roller 31 and separation roller 32. A manual feed switch 70 is disposed in the conveyance path 8A midway from the upstream side of the conveyance. Copy paper conveyance path 8 of the conveyance path of copy paper P2
B (hereinafter referred to as conveyance path 8B) is the pickup roller 1
5 to registration roller 19. This conveyance path 8B
A feed roller 311, a separation roller 32, and a paper stop switch 18 are disposed in this order from the upstream side. Transfer paper conveyance path 8C of the conveyance path of copy paper P3
(hereinafter referred to as the conveyance path 8C) is the pickup roller 16
to the registration roller 19.

In the middle of this conveyance path 8C, from the upstream side, there are a feed roller 341, a separation roller 35, and a paper stop switch 1.
8 are arranged in sequence. Further, the conveyance path 8A joins the conveyance path 8B from the feed roller 31 and the separation roller 32.

In the conveyance path 8B, the copy paper P2 is taken out by a drive mechanism (not shown) by rotating and lowering the pickup roller 15, and is conveyed to the sliding contact portion between the feed roller 31 and the separation roller 32. The feed roller 31 rotates in the direction indicated by the arrow in the figure.

The separation roller 32 is similarly driven to rotate in the direction indicated by the arrow in the figure. Therefore, when there is no copy paper P2 or when one sheet is fed, friction occurs between the feed roller 31 and the separation roller 32 or between the copy paper P and the separation roller 32. At this time, the spring joint provided around the support shaft (not shown) slips, and the separation roller 32
rotates in the direction of arrow C shown in the figure. In other words, when sending one sheet,
Copy paper P2 is conveyed to paper stop switch 18. When two copies of the copy paper P2 are fed, the separation roller 32 and the feed roller 31 both rotate in the direction indicated by the arrow in the figure since the friction between the copy papers P2 is small. In this case of two-sheet feeding, the upper copy paper P
2 is conveyed to the paper stop switch 18 by the feed roller 31, and the lower copy sheet P3 is conveyed to the paper stop switch 18 by the feed roller 31.
2, it is returned to the top picture paper cassette 3A. In this way, only one sheet of copy paper P2 is transported. Copy paper P
2, the registration roller 19 is turned on by turning on the paper stop switch 18 after a predetermined time after the feed roller 31 is conveyed.
It is then aligned and transported to the transfer process.

The same applies to the mode of conveyance of the copy paper P3 in the conveyance path 8C.

Further, when the copy paper P1 is fed onto the manual feed tray 2A, the manual feed switch 70 detects the copy paper P1 and is turned on from off. Furthermore, the manual feed roller 33 of the conveyance path 8A is rotated and lowered by a drive mechanism (not shown), and further rotated to form the feed roller 31 and separation roller 32.
The copy paper P1 is conveyed to the sliding contact portion. From there, it becomes the conveyance path 8B, and the conveyance operation of the copy paper P1 is as described above.

In FIG. 4, an upper size switch 71 and a lower size switch 72 are provided in each paper feed cassette mounting opening of the main paper feed device 3 and the sketch paper device 4. Paper empty switches 73 and 74 are provided at the inner bottom of each paper feed cassette mounting opening, respectively. The upper size switch 71 and the lower size switch 72 are both cassette non-installation signal generating means that detect whether each paper feed cassette is installed or not and generate a signal when the paper feed cassette is not installed. When the paper feed cassette to be used, for example, the overprint paper cassette 3A, is not installed, the contact of the upper size switch 71 is closed and a cassette non-installation signal is sent to a control circuit to be described later. When the lower size switch 4A is not installed, the lower size switch 72 performs the same operation. Furthermore, in this state, the paper replenishment indicator lamp in the lamp section 53 blinks, and the copying operation does not start even if the copying key 55 is turned on.

Furthermore, since the upper size switch 71 and lower size switch 72 also generate an identification code unique to the cassette (indicating the size of the copy paper stored in the cassette), the size of the copy paper in the cassette can be determined according to the installed cassette. It also detects. This upper size switch 71
and the lower size switch 72, together with the selection of the cassette selection key 59 described above, set the size of the copy paper related to multiple operations.

Further, paper empty switches 73 and 74 are paper empty detection devices that detect the presence or absence of copy paper P in each paper feed cassette and issue a signal. If there is no copy paper P in one or both paper feed cassettes, a paper out signal is sent to a control circuit to be described later. In this state, the paper replenishment indicator lamp in the lamp section 53 blinks as in the case when the cassette is not loaded, and the copying operation will not be started even if the copy key 55 is turned on.

A manual feed switch 70 is provided at the attachment point of the copy paper P1 of the manual paper feeder 5. This switch is a paper insertion detection device that detects whether copy paper P1 is inserted or not and issues a signal. Manual feed tray 2A
When the copy paper P1 is placed and set, the contact of the manual feed switch 70 is closed, and a paper insertion signal is sent to a control circuit to be described later. In this state, the manual paper feed section setting is displayed on the liquid crystal display section 62, and selection of a paper feed cassette by pressing the cassette selection key 59 is no longer accepted.

Furthermore, a manual paper feeding width detector 75 is similarly provided to detect the width size of manually fed copy paper. This paper feed width detector 75 and the above-mentioned paper stop switch 1
The size of the manually fed copy paper is detected during the time when 8 is on.

FIG. 1 shows the overall control circuit of the device according to this embodiment. That is, the CPU 80 is a main control section and controls the entire copying machine. For the input of this CPU80,
The following devices are connected via the input interface circuit 81. Paper stop switch 18. Input switches 82 such as various keys on the operation panel PA. Front cover switch 83. Other various switches and sensors necessary for copying operations 841; manual feed switch 70 for detecting insertion of copy paper into manual paper feed table 2A; manual paper feed width detector 75. These include a copy paper empty detection device 85 and a cassette uninstalled signal generation means 86 of the main paper feeding device 3, a copy paper empty detection device 87 and a cassette signal generation means 88 of the sketch paper device 4, and the like. Further, the following devices are connected to the output of the CPU 80 via an output interface circuit 89. Lamp section 53 of operation panel PA
and a display device 90 such as a liquid crystal display section 62 and a manual paper feeder 2. These are various power supplies 91, various motors 92, and various solenoids 93 for the main paper feed device 3 and the sketch paper device 4.

Note that the cassette non-installation signal generating means 86 and 88 include the above-mentioned upper size switch 71 and lower size switch 72. The signals supplied by these switches are also input to the CPU 80 via the input interface circuit 81, and are further displayed on the liquid crystal display section 62 of the operation panel PA via the output interface circuit 89, so that the copy paper size can be visually checked. You can check it.

Further, a signal from the paper stop switch 18 is also input to the CPU 80 via the input ink face circuit 81.

The signal from the paper stop switch 18 is an ON signal that is sent to synchronize the rotation of the photosensitive drum 7 and the conveyance of the copy paper P in the copying operation of the main body 1 described above, and to feed the copy paper P from the registration rollers 19. It's a signal. This signal is counted by the counting function of the program within the CPU 80. Further, the counted value is stored in a storage device 94 externally connected to the CPU 80 at any time.

The storage device 94 is an EEPROM (electrically erasable/erasable memory).
writable read-only memory) or RAM,
This is a storage device that stores the number of sheets to be fed (number of times of sheet feeding operation) calculated by the CPU 80, and its details will be explained below.

As shown in FIG. 5, in this embodiment, the number of fed sheets is stored for each paper feeding unit in the storage device 94, so that an A4 size copy fee storage area 94A, an A3 size copy fee storage area 94B, and a B4 size copy fee storage area 94B are stored in the storage device 94. Fee storage areas 94C and B5
A size copy fee storage area 94D is provided. In addition, an A4 size storage area 94 is a storage area for storing the number of copies for each size of copy paper fed by each paper feeding device.
E, A3 size storage area 94F, B4 size storage area 9
They are provided as 4G and B5 size storage areas 94H, respectively. These storage areas are selected and the count data is stored in accordance with the above-mentioned settings of the paper feeding device used and the size of the copy paper fed by each paper feeding device. Data is stored in parallel in the storage area for each paper feeding device and the storage area for each paper size. The count data stored in the area for each paper feeding device and the area for each copy paper size is composed of, for example, 4 bits x 5, and is stored in a BCD code. Further, the count data stored in the total storage area 94D is composed of, for example, 4 bits x 5, and is stored in BCD code.

Next, the operation of each paper feeding device in the above-described configuration will be mainly explained. First, the operation of the paper feeding device from the time the power is turned on will be explained using the flowcharts shown in FIGS. 6 and 7. When the power is turned on, the process proceeds to step 100. In step 100, it is checked whether warming up of the heat roller 20 has been completed. Once completed,
The copy permission display lamp on the operation panel PA is turned on to enter the standby state, and in step 101 the operation panel PA
Accepts key operations above. Next, the process proceeds to step 102, in which it is checked whether the manual feed switch 70 is turned on in order to check whether the manual paper feed table 2A is to be used.

If it is not turned on, the process proceeds to step 103; if it is turned on, the process proceeds to step 109. In step 109,
Select manual paper feeder 2 and proceed to step 113. Further, in step 103, it is checked whether or not the paper cassette is not installed by the cassette not installed signal generating means 88 in the cassette not installed signal generating means 88 in the insertion slot of the sketch paper device 4, and even if it is installed, copy paper is not loaded. The output of the copy paper empty detection device 87 is checked to see if P3 is set.

If copy paper P3 is not set, step 104
Proceed to. At step 104, the overlay paper cassette 3A is checked in the same manner as the underlay paper cassette 4A at step 103. If copy paper P2 is set, the process advances to step 105. In step 105, the copy paper supply lamp on the operation panel PA is turned on, and the copy paper supply lamp on the operation panel PA is also turned on.
Turn off the copy ready indicator lamp above and return to standby mode.

In this way, when the manual paper feeder 5 is not used and the top picture paper cassette 3A and the bottom picture paper cassette 4A are not installed or the copy paper P2 is empty, replenishment of the copy paper P2 is prompted. In step 103, if the sketch paper cassette 4A is installed, the process advances to step 106. In step 106, it is checked whether the overprint paper cassette 3A is installed, and even if it is installed, the copy sheet empty detection device 85 checks whether copy paper P2 is set. If copy paper P2 is set, the process advances to step 108.

In step 108, it is checked whether the paper non-feeding device 4 is currently selected by the cassette selection key 59.

If the paper non-feeding device 4 has been selected, the process advances to step 110. In step 110, the paper non-feeding device 4 is selected, and the process proceeds to step 113. In step 106, if the main paper feeder 3 is not installed, step 108 is skipped and the process proceeds to step 110. Said step 104
If the main paper feeding device 3 is installed in step 108, or if the non-feeding device 4 is selected in step 108, the process advances to step 111. In step 111, the main paper feeding device 3 is selected and the process proceeds to step 113. In this way, if the sketch paper device 3 and the sketch paper device 4, or any one of them, is not installed, selection of the paper feed device that is not installed is prohibited.

In step 113, the storage area of the storage device 94 corresponding to the selected paper feeding device is set, and the size of the copy paper P in the selected paper feeding device is displayed and the storage area corresponding thereto is set. That is, the size of the stored copy paper P is determined based on the identification code of the paper feed cassette of the selected paper feed device, and is displayed on the liquid crystal display section 62 on A (for example, A4 size). After displaying the size of the copy paper P in this manner, the process proceeds to step 114. Step 114
Now, check whether there is any abnormality inside the main body 1. If there is an abnormality, the abnormality will be handled and the system will return to the standby state. If there is no abnormality, the process advances to step 115. Step 1
At step 15, it is checked whether the copy key 55 on the operation panel PA has been turned on. If it is turned on, the copying operation is started and the process advances to step 116. If it is not turned on, it returns to standby mode.

In step 116, various solenoids, various motors, various power supplies, and various lamps are turned on, and the process proceeds to step 117. In step 117, the pickup roller in the selected paper feeding device rotates to start feeding paper, and in step 1
Proceed to step 18. In step 118, a feed roller is rotated to convey the picked up transfer paper P,
Proceed to step 119. In step 119, the paper stop switch 18 is turned on after a predetermined period of time has passed since the feed roller conveys the copy paper P, and step 120
Proceed to. In step 120, "1" is subtracted from the display content of the sheet number display section 54 on the operation panel PA, and in step 121
Proceed to. In step 121, a storage area in the storage device 94 corresponding to the size of the copy paper (if it is A4 size,
The pig stored in the A4 size paper feed number storage area 94E) is read out, and the process proceeds to step 122. Step 12
In step 2, "1" is added to the read data, and the process proceeds to step 123. In step 123, the added data is stored again in each storage area from which it was read, and
Proceed to step 24. In step 124, the registration roller 19
1 is rotated to convey the copy paper P onto the transfer charger 11 that performs image transfer, and the process proceeds to step 125. The step 120 can be performed between steps 121 to 124, or before or after steps 121 to 124. In step 125, it is checked whether or not the set number of sheets has been fed. If paper feeding has finished, proceed to step 1.
Proceed to step 26. In step 126, various solenoids, various motors, various power supplies, and various lamps are turned off.
Return to standby state. If the set number of sheets has not been fed in step 125, step 1
Return to 17. It is also possible to perform steps 120 to 123 in parallel to step 124.

Next, the operation of displaying copy charges for each size of copy paper will be explained using the flowchart shown in FIG. When displaying copy charges by size from standby mode,
Proceed to step 130. In step 130, it is checked whether or not there is a request to display copying charges by size (inputted by pressing the counter key 52 on the operation panel PA).

If there is a display request, the process advances to 131. In step 131,
The copying fee for each size and the number of sheets fed for each size of copy paper are read from the storage area in the storage device PA, and the copying fee for each size is added up.

After performing the calculation in this manner, the process proceeds to step 132.

In step 132, the number of sheets to be conveyed by each conveyance roller is set to the first
The information is displayed on the liquid crystal display section 62A on the operation panel PA as shown in FIG. 0, and the process proceeds to step 131. These display characters, display locations, etc. are read and set from the contents of the ROM within the CPU 80. In step 133, it is checked whether there is a request to clear the number of sheets to be transported displayed on the liquid crystal display section 62 in step 132.

If there is a clearing request, the process advances to step 134. Step 1
If there is no clearing request in step 34, the process advances to step 135. A predetermined period of time (for example, 30
(seconds) Check to see if it has elapsed. If the predetermined time has not elapsed, the process returns to step 133, and if the predetermined time has elapsed, the process proceeds to step 135. In step 135, the display on the liquid crystal display section 62 is returned to the normal mode, and the standby state is returned. Further, in step 130, if there is no display request, the device returns to the standby state.

Next, the operation of displaying and changing the copying fee for each size of copy paper will be described in detail using the flowchart shown in FIG. When displaying the copy unit charge by size from the standby state, the process advances to step 140. In step 140, it is checked whether there is a request to display the copy unit price by size (by pressing the information key 63 on the operation panel PA). If there is a display request, the process advances to step 141; otherwise, step 140 is repeated. Step 1
41, storage areas 94A to 94 of the storage device 94
The data stored in D is read out and displayed on the liquid crystal display section 62 as shown in FIG.

The process then proceeds to step 142. In step 142, it is checked whether there is a request to change the copying fee by size based on the number of times the cassette selection key 59 is pressed. If there is no change request, the process proceeds to step 143; if there is a change request, the process proceeds to step 144. In step 144, the copying fee is set by pressing the numeric keypad 54 described above, and the process proceeds to step 145. In step 143, it is checked whether a predetermined period of time (for example, 30 seconds) has elapsed since step 141 was executed. If the time has elapsed, the process advances to step 145; if the time has not elapsed, the process returns to step 142. In step 145, the display of the size-based copy unit charge displayed on the liquid crystal display section 62 is cleared and the process returns to the standby state.

With the configuration described above, since the count data is stored in BCD code, there is no need for data conversion when counting and displaying the count data. When displaying the count value of the count data, it is displayed on the liquid crystal display section 62 on the operation panel PA, so no extra parts are required. Further, if the signal from the paper stop switch 18 is counted, it is possible to obtain a more accurate paper feed count value since the copy paper P is at a position where the probability of jamming is low. The low probability of jamming can be attributed to the fact that the paper stop switch 18 is located upstream of the copy paper transport path 17, and the number of transport rollers used up to that point is small. Note that the present invention is not limited to the above-mentioned embodiments, and although the number of sheets transported by each transport roller is displayed at once, the number of sheets transported by each transport roller may be displayed each time a predetermined key on the operation panel is pressed, or the number of sheets transported by each transport roller may be displayed at a constant value. It is also possible to display the information sequentially by time. Further, the sheet number readout switch is not limited to this embodiment.

[Effects of the Invention] As detailed above, according to the present invention, the number of fed sheets for each paper feeding device and each size of copy paper is stored, and the number of sheets to be transported and the copying fee calculated from the stored data are displayed. Therefore, it is possible to easily change the copying fee for an image forming apparatus equipped with a plurality of paper feeding devices, and it is possible to accurately grasp the data of the desired copying fee.

[Brief explanation of the drawing]

1 to 11 show an embodiment of the present invention,
Fig. 1 is a block diagram of the control device, Fig. 2 is a schematic cross-sectional view of the copying machine, Fig. 3 is a front view of the operation panel, Fig. 4 is a schematic cross-sectional view of the paper feeding device, and Fig. 5 is a schematic cross-sectional view of the copying machine. 6 is the first half of the flowchart of the operation of the paper feeding device, FIG. 7 is the second half of the flowchart of the operation of the paper feeding device, FIG. 8 is the flowchart of the copying fee display operation for each copy paper size, and FIG. 9 is the flowchart of the operation in the liquid crystal display section. A front view showing the display of the unit copying fee and its changing operation. FIG. 10 is a front view of the liquid crystal display unit displaying the copying fee for each copy paper size. FIG. 11 is a front view showing the unit copying price for each copy paper size. FIG. 3 is a cross-sectional view of a liquid crystal display section. 3...Drawing paper device, 4...Drawing paper device, 5...Manual paper feeding device, 18...Paper stop switch,
70...Manual feed switch, 62.62A
...Liquid crystal display section, 71...Upper size switch,
72...Lower size switch, 80...CPU, 9
4...Storage device

Claims (1)

[Scope of Claims] An image forming apparatus capable of feeding image forming materials of a plurality of sizes and forming images on each of them, comprising: a storage means for storing charge data for each size of the image forming materials; It is characterized by comprising a reading means for reading data stored in the reading means, a rewriting means for changing the data read by the reading means, and a display means for displaying the data read by the reading means. Image forming device.