JPH08230286A - Printer - Google Patents

Abstract

PURPOSE: To provide a printer which accurately predicts the time of the running- out of print sheets, informs it to a user, and efficiently supplements the sheets at the optimum time. CONSTITUTION: Sheet managing means 21 manages the remaining sheets. Necessary sheet quantity detecting means 22 detects print sheet quantity necessary to print information prior to the print of the information. Comparing means 23 compares the print sheet quantity with the remaining sheets. Time predicting means 24 predicts the time required to output the information of the remaining sheet quantity of the remaining quantity is less than the print sheet quantity from the result of the comparison by the comparing means. Display means 25 displays a sheet running-out time responsive to the predicted value by the predicting means. With the above structure, the accurate time of the running-out of the sheet is informed to a user, and efficient supplement of the sheets can be conducted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer device, and more particularly, to a printer device which prints data transmitted from a host computer, can prevent a stop due to paper exhaustion, and can operate efficiently. .

[0002]

2. Description of the Related Art In a conventional printer device, a sensor for detecting the remaining amount of printing paper is attached to a paper tray in order to prevent the printing device from being stopped during printing due to the printing paper being out of paper, and the printing is performed by the sensor. When the remaining amount of paper becomes less than a certain amount, the operator is notified via a console panel or the like to prompt the user to replenish printing paper. Further, the following technique disclosed in Japanese Patent Laid-Open No. 5-270082 has been proposed as a notification of the shortage of the remaining amount of paper. In this printer device, when the user supplies the printing paper to the printer device, the number of supplied printing papers is input to the paper usage amount file management means. This paper usage amount file management means sums up the input number of supplied printing sheets and the remaining number of sheets read from the file, and updates the remaining number of sheets of the file. When the user requests the printer to print, the print request number recognition unit obtains the print request number from the print requests and notifies the printability determination unit. In response to this, the printability determination means compares the remaining number of sheets of paper with the requested number of sheets of printing. As a result, if the remaining number of sheets of paper is less than the requested number of sheets of printing, the user is notified via the notifying means. It notifies the shortage of printing paper. Further, the actual number of remaining sheets can be known by subtracting the number of printed sheets from the number of remaining sheets.

[0003]

However, the conventional printer apparatus has a problem that even if the operator is notified that the remaining amount of printing paper is low, the operator does not know when the printing paper will actually run out. Further, in a printer device that uses printing paper such as cut paper that can be replenished midway, the printing paper tends to be replenished early in order to prevent the printer device from stopping due to paper shortage.
For this reason, there is a problem in that the replenishment is performed even when the printing paper is still sufficient, and the number of replenishments increases and the efficiency deteriorates. On the other hand, if the replenishment of printing paper is delayed in order to reduce the number of times of replenishment, the printing paper may be consumed sooner than expected by the user, and the printer device may stop during printing. In particular, in a printer device that performs high-speed printing, the above-mentioned problems become prominent. Therefore, there is a problem that the printer device cannot be operated efficiently.

Further, in a printer device that uses printing paper such as roll paper that cannot be replenished midway, for example, a plotter device, etc., even when the remaining amount of roll paper is reduced below a certain amount, It is uneconomical to replace the roll paper on the way, so the roll paper is used up before replacement. Therefore, even if such a printer device is notified only of the decrease in the remaining amount of roll paper and prompts the operator to replenish it, in reality, it is necessary to wait until all the roll paper is used up. There is a problem that it is not possible to efficiently replenish.

In particular, in the printer device disclosed in the above publication, when the user supplies the printing paper, it is necessary to accurately input the number of the printing paper supplied. However, there is a possibility that the printing paper may not be accurately input, and since the input number of printing sheets supplied is different from the actual number of printing sheets supplied, there is a problem that the shortage of printing sheets cannot be accurately notified. In addition, there is a problem in that it is necessary to input the number of sheets to be supplied each time printing paper is supplied, and the user is required to perform a complicated operation. An object of the present invention is to eliminate the above-mentioned problems of the prior art, accurately predict the time when the printing paper runs out, notify the prediction result, and efficiently replenish the printing paper at the optimum time. Thus, it is an object of the present invention to provide a printer device which can prevent the printer device from being stopped during printing due to paper shortage, and can reduce the number of times the printing paper is replenished and the time and effort required to replenish the printing paper.

[0006]

In order to achieve the above-mentioned object, the invention of claim 1 is a paper management means for managing the remaining amount of paper, and print information before printing the print information. As a result of comparison between the required paper amount detecting means for detecting the amount of printing paper required for printing, the comparing means for comparing the printing paper amount and the remaining amount of paper, and the comparing means, the remaining amount of paper is the printing paper. When the amount is less than the amount, a time predicting unit that predicts a time required to output the print information for the remaining amount of paper, and a display unit that displays a paper-out time according to a predicted value by the time predicting unit The point is that it was done.

According to the invention of claim 2, a communication means for communicating with a data processing terminal connected via a network line, a destination setting means for setting the data processing terminal for transmitting the paper out time, Protocol setting means for setting a protocol corresponding to the data processing terminal, creating means for creating the content of the paper out time in a format corresponding to the protocol, and using the protocol, the content of the paper out time It is characterized in that it comprises a transmitting means for transmitting to a data processing terminal. Further, the invention of claim 3 comprises a communication means for communicating with a data processing terminal connected through a dedicated line, and a transmitting means for transmitting the content of the paper out time to the data processing terminal. There are features.

According to a fourth aspect of the present invention, a sheet usage amount detecting means for detecting a change in a predetermined amount of the thickness of the sheet bundle during the output period of the sheets accommodated in the sheet tray, and the sheet bundle thickness Paper count means for counting the number of sheets output during the change in the predetermined amount, paper thickness calculation means for calculating the thickness of the paper from the value counted by the paper count means, and paper thickness calculation means It is characterized in that it is provided with a remaining sheet number calculating means for calculating the remaining number of sheets from the thickness of the sheets and the thickness of the bundle of sheets remaining in the sheet tray. According to a fifth aspect of the present invention, a sheet usage amount detecting means for detecting a variation amount of the thickness of the sheet bundle during a period of outputting the planned number of sheets, and a variation of the thickness of the sheet bundle corresponding to the expected number of output sheets. A sheet thickness calculating unit that calculates the thickness of one sheet from the amount, and a sheet number that calculates the remaining number of sheets from the thickness of the sheet calculated by the sheet thickness calculating unit and the thickness of the sheet bundle remaining in the sheet tray. It is characterized in that it has a remaining number calculation means.

[0009]

According to the invention of claim 1, the comparison means compares the remaining amount of paper managed by the paper management means with the number of printing papers detected by the paper number detection means. If it is determined from the result of this comparison that the number of print sheets is insufficient, the paper dead time calculating means can accurately calculate the paper dead time, and the display means can display the paper dead time. For this reason, it is possible to know when the sheets are exhausted, and it is possible to efficiently replenish the sheets at the optimum time. According to the second aspect of the present invention, the paper out time can be transmitted to a data processing terminal connected via a network line in a protocol format compatible with the data processing terminal. Therefore, it becomes possible for the data processing terminal connected via the network line to know when the paper runs out. Further, according to the invention of claim 3, the content of the paper out time can be transmitted to the data processing terminal connected through the dedicated line. Therefore, it becomes possible for the data processing terminal to know when the paper runs out.

According to the invention of claim 4, the change amount of the thickness of the sheet bundle detected by the sheet usage amount detecting means,
From the number of sheets output during the sheet output period, the sheet thickness calculation means calculates the sheet thickness. The remaining sheet number calculating means can calculate the remaining number of sheets from the thickness of the sheet and the thickness of the bundle of sheets remaining in the sheet tray. Therefore, the number of sheets remaining in the sheet tray can always be known accurately. According to the fifth aspect of the present invention, the number of sheets is calculated from the amount of change in the thickness of the sheet bundle during the period in which the planned number of sheets detected by the sheet usage amount detecting unit is output and the planned number of output sheets. The thickness calculating means calculates the thickness of one sheet. The remaining sheet number calculating means can calculate the remaining number of sheets from the thickness of the sheet and the thickness of the bundle of sheets remaining in the sheet tray.
Therefore, the number of sheets remaining in the sheet tray can always be known accurately.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. FIG. 2 is a block diagram showing the configuration of the printer device of the present invention. In the figure, reference numeral 1 is a printer device, which is composed of functional units 2 to 14 and 17 described later. A CPU 2 is connected to each functional unit in the printer device 1 via the data bus 17 or the like and controls each functional unit and performs various calculations. Reference numeral 3 is a program memory for storing various programs and constants necessary for the operation of the printer apparatus 1, 4 is a working memory for temporarily storing data required for the operation of the printer apparatus 1, and 5 is a printer memory of the printer apparatus 1. Even when the main power is turned off, the printer device 1
A non-volatile memory for storing and holding information and states of various processing operations of the above, and 6 is an image memory for storing bitmap data printed by the printer engine 12 described later. The program memory 3 and the non-volatile memory 5 are, for example, a ROM or an RO with a backup power source.
M, etc., and the working memory 4 and the image memory 6 are
For example, each is composed of a RAM.

Reference numeral 7 is a communication interface (hereinafter abbreviated as communication I / F) for communicating with the computer 16 connected via a network line 18 such as a LAN. 8
Is a print information storage device that stores print information input from the communication I / F 7 for each job, and is composed of, for example, a hard disk device. 9 is a clock circuit for managing time,
Reference numeral 10 denotes a console panel for displaying the operating status and errors of the printer device 1, displaying for prompting the replenishment of consumable items such as printing paper and toner, and operating the printer device 1, and 11 for the image memory. An engine interface (hereinafter referred to as Engine I) that transfers the bitmap data stored in 6 to the printer engine 12 described later, and receives the status of the printer engine 12 and the status of consumables.
/ F), 12 is a printer engine for printing the bitmap data transferred from the engine I / F 11 and transferring the status of itself and the status of consumables to the engine I / F 11. A sheet remaining amount sensor 13 detects a change in the thickness of a bundle of printing sheets remaining in a sheet tray (not shown) in the printer engine 12 and outputs the detection result to the working memory 4, for example, an angle sensor. Is used. A dedicated line interface (hereinafter, abbreviated as a dedicated line I / F) 14 communicates with the computer 15 connected via the dedicated line. The sheet remaining amount sensor 13 detects the first prescribed amount and the second prescribed amount, and detects the thickness of the bundle of printing sheets from the difference between the first prescribed amount and the second prescribed amount. Further, the computers 15 and 16 are data processing terminals, and the data processing terminals include not only the computers 15 and 16 but also facsimile machines and the like.

Next, the operation of the printer device 1 of the present invention will be described with reference to the drawings. FIGS. 3A and 3B are flowcharts showing the operation of predicting the time when the printing apparatus 1 runs out of printing paper. First, in step S1,
The print information is sent from the computer 16 via the communication I / F 7 or from the computer 15 via the dedicated line I / F 14.
And is stored in the print information storage device 8. In step S2, the number of print sheets required to print the print information is obtained from all the print information stored in the print information storage device 8. In step S3, it is determined whether or not the total number of sheets required for printing obtained in step S2 is larger than the remaining number of sheets of printing paper accommodated in the paper tray in the printer engine 12. It The remaining number of printing sheets is calculated by the operation shown in FIG. 4 described later. This step S3
If the determination is positive, the process proceeds to step S4. On the other hand, if the determination is negative, the series of operations for predicting the time when the paper runs out is ended.

In step S4, the data amount of each print information stored in the print information storage device 8, the number of vectors,
The time required for printing is calculated from the line feed code, page break code, etc., and the time from the total of these to the paper exhaustion is accurately predicted. This step S4 is specifically shown in FIG.
As shown in the flowchart of FIG.
Then, the number of remaining sheets of printing paper is read out, and step S12
Then, the amount of data corresponding to the read remaining number of sheets is detected. Then, in step S13, the time required to process the detected data amount is calculated, and the time until the paper runs out is accurately predicted. Again, it returns to Fig.3 (a). The data amount is the amount of data considering the distinction between raster data and vector data. In step S5, the paper out time estimated in step S4 is set to the console panel 10
Is displayed on the computer 16 via the communication I / F 7.
Computer 1 or via the private line I / F 14
Notify 5 and end. The paper-out time is notified at a time such as hours and minutes, or hours and minutes.

The notification of the out-of-paper time of the printing paper performed in step S5 may be as follows. In the case where the computers 15 and 16 are large-scale computers or the like that require specialized operations by the operator, or when the printer device 1 is a device that requires specialized operations by the operator, for example, management of the printer device 1 is performed. Notify the data processing terminal used by the operator or a dedicated operator who supplements the printing paper. Also, the computer 15
Computers 15 and 16 are provided in the case of a printer device in which print information from printers 16 and 16 has a priority, and the output order of print information is rearranged according to the priority.
Side does not know which print information will be printed, so
The data processing terminal used by the dedicated operator who replenishes printing paper is notified of the paper run-out time. On the other hand, when the priority order of each print information does not change, the computer 15 or 16 that outputs the print information at the end is notified of the paper-out time. At the same time, the full-time operator may be notified of the paper-out time.

Further, the notification of the paper out time is performed by the communication method as described below. For example, the computer that has transmitted the print information is notified of the paper-out time using the protocol used to transmit the print information. When the protocol is not available, another protocol that can notify the paper-out time is used for notification. Further, a protocol other than the computer that has transmitted the print information, that is, a data processing terminal other than the computer is set and notified according to the protocol of the data processing terminal. Further, when notifying the data processing terminal that cannot use the above-mentioned protocol of the paper-out time, for example, a content regarding the paper-out time is created by an e-mail form, and the data-processing terminal is electronically notified. Notify using email. As described above, it is possible to accurately predict the time when the printing paper runs out and notify the operator of the prediction result.
Therefore, it is possible to know when the printing paper is exhausted, and it is possible to efficiently replenish the printing paper at the optimum time, prevent the printer device from being stopped due to paper shortage, and to check the number of times the printing paper is replenished and the printing paper. It is possible to reduce the time and effort required for replenishment.

Next, the operation of detecting the remaining number of printing sheets currently stored in the sheet tray of the printer engine 12 will be described. FIG. 4 is a flowchart showing the operation of detecting the remaining number of printing sheets. First, in step S21, it is determined whether or not the sheet remaining amount sensor 13 has detected the first specified amount. When this determination is affirmative, the fact that the first specified amount has been detected is stored in the work memory 4 and the process proceeds to step S22. On the other hand, if the answer is negative, return to the return. In step S22, it is determined whether or not the flag (F) in the work memory 4 is "1". If this determination is negative, the process proceeds to step S23,
On the other hand, if the result is affirmative, the process proceeds to step S25. Step S
At 23, a counter (not shown) provided in the working memory 4 starts counting. This counter
Every time one print sheet is output, the count is incremented by "1". Next, in step S24, "1" is set in the flag (F).

In step S25, it is judged whether or not the second remaining amount sensor 13 has detected the second specified amount. If this judgment is negative, return to the return. When the printing paper is output and the second specified amount is detected by the remaining paper amount sensor 13, the determination in step S25 becomes affirmative and the fact that the second specified amount is detected is stored in the working memory 4. Then, the process proceeds to step S27. Step S2
In 7, the value of the counter that started counting in step S23 is read from the working memory 4. In step S28, from the counter value, that is, the number of print sheets output as a plurality of sheets, and the thickness of the bundle of print sheets calculated based on the first and second prescribed amounts detected by the sheet remaining amount sensor 13. , The thickness of one printing sheet is calculated. In step S29, the accurate remaining number of sheets of printing paper is determined from the thickness of the printing paper and the thickness of the bundle of printing paper remaining in the paper tray calculated based on the second specified amount. The calculation is performed, the result is stored in the working memory 4, and the process returns. Such a series of operations for detecting the number of remaining sheets of printing paper is performed when print information is received, when the print information is converted into bitmap data, or by interruption at certain fixed time intervals. As mentioned above,
The printer device 1 calculates the thickness of one print sheet from the output thickness of the print sheet bundle and the number of output sheets, and from the estimated value and the thickness of the print sheet bundle remaining in the paper tray, It is possible to accurately calculate how many sheets of printing paper remain in the paper tray.

Next, another embodiment of the operation for detecting the remaining number of printing sheets shown in FIG. 4 will be described. First, the amount of change in the thickness of the bundle of print sheets while a certain fixed amount (for example, 100 sheets) of print sheets is output is calculated by the sheet remaining amount sensor 1
3 to detect. Next, the thickness of one print sheet is calculated from the change amount and the number of output print sheets.
An accurate number of remaining sheets of printing paper is calculated from the thickness of the bundle of printing paper remaining in the paper tray after the change amount is detected by the paper remaining amount sensor 13 and the thickness of one printing paper, The result is stored in the working memory 4.

As described above, also in this embodiment, the number of printing sheets remaining in the sheet tray can be accurately calculated.

Next, a printer device 1 using roll paper
The operation of predicting the time when the printing paper will run out will be described. First, the print information is received and stored in the print information storage device 8. From the vector data amount of all the print information stored in the print information storage device 8 and the like, the print paper amount required to print the print information is obtained. Next, when the total amount of the printing paper is larger than the remaining amount of the printing paper of the roll paper accommodated in the printer engine 12,
From the thickness of the roll paper known in advance and the thickness of the rolled roll paper detected by the remaining paper amount sensor 13,
The remaining amount of printing paper is calculated and stored in the work memory 4. Then, the remaining amount of printing paper is read out and the amount of data corresponding to the remaining amount of printing paper is detected. The time required to process the detected amount of data is calculated, the time until the paper runs out is accurately predicted, and the data processing terminal is notified of the paper run-out time.

Next, the functional configuration of the above embodiment is shown in FIG.
Will be described with reference to the block diagram of FIG. FIG. 1 is a functional block diagram showing a functional configuration of main parts of a printing apparatus of the present invention. In the figure, 21 is a paper management means for managing the remaining amount of paper by the output of the remaining paper amount sensor 13, and 22 is the amount of print paper necessary for printing the print information before printing the print information. Required sheet amount detecting means, 23
Is a comparison means for comparing the printing paper amount and the remaining amount of paper,
Reference numeral 24 is a time predicting means for predicting the time required to output the print information for the remaining amount of paper when the remaining amount of paper is smaller than the printing paper amount as a result of the comparison by the comparing means.
Reference numeral 5 is a display means for displaying the paper run-out time according to the predicted value by the time predicting means, 26 is a data amount of the print information stored in the print information storage device 8 (see FIG. 2), and the required paper is Quantity detecting means 22 and time predicting means 2
4 is a data amount detecting means for supplying the data amount of the print information to No. 4.

Next, the operation of the block diagram of FIG. 1 will be described. The required paper amount detecting means 22 is C shown in FIG.
When printing is started from PU2, the print information stored in the print information storage device 8 is calculated from the data amount of the print information supplied from the data amount detection means 26 prior to the start of printing by the printer engine 12. The amount of printing paper needed to print the. Next, the comparison means 23
Compares the remaining amount of paper managed by the paper management unit 21 with the printing paper amount. As a result, when the remaining amount of paper is smaller than the amount of printing paper, the time predicting unit 24 calculates the printing information for the remaining amount of paper from the amount of printing information supplied from the data amount detecting unit 26 and the remaining amount of paper. The time required for outputting is predicted, and the display means 25 displays the predicted time or the paper-out time based on the predicted time.

[0024]

As is apparent from the above description, according to the first aspect of the present invention, the remaining amount of paper managed by the paper management means and the number of printing papers detected by the paper number detection means are It is compared by the comparison means. If it is determined from the result of this comparison that the number of print sheets is insufficient, the paper dead time calculating means can accurately calculate the paper dead time, and the display means can display the paper dead time. For this reason, it is possible to know when the sheets are exhausted, and it is possible to efficiently replenish the sheets at the optimum time. As a result, it is possible to prevent the printer apparatus from being stopped due to the paper shortage, reduce the number of times the paper is replenished, and reduce the trouble of replenishing the paper.

According to the second aspect of the invention, the paper out time can be transmitted to the data processing terminal connected via the network line in the format of the protocol corresponding to the data processing terminal. . Therefore, the data processing terminal connected via the network line can know when the paper runs out. Further, according to the invention of claim 3, the content of the paper out time can be transmitted to the data processing terminal connected through the dedicated line. Therefore, the data processing terminal can also know when the paper runs out.

According to the fourth aspect of the invention, the sheet thickness calculating means is calculated from the amount of change in the thickness of the sheet bundle detected by the sheet usage amount detecting means and the number of sheets output during the sheet output period. Therefore, the thickness of the paper can be calculated. Also,
The remaining number of sheets can be accurately calculated by the remaining sheet number calculating means from the thickness of the sheet and the thickness of the sheet bundle remaining in the sheet tray. Therefore, the number of sheets remaining in the sheet tray can always be known accurately. Further, according to the invention of claim 5, from the change amount of the thickness of the sheet bundle during the period of outputting the planned number of sheets detected by the sheet usage amount detecting unit and the output planned number of sheets,
The paper thickness calculation means calculates the thickness of the paper. The remaining sheet number calculating means can calculate the remaining number of sheets from the thickness of the sheet and the thickness of the bundle of sheets remaining in the sheet tray. Therefore, the number of sheets remaining in the sheet tray can always be known accurately.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a functional configuration of a printing apparatus of the present invention.

FIG. 2 is a block diagram showing a configuration of a printer device of the present invention.

FIG. 3 is a flowchart showing an operation of predicting a time when the printing paper runs out of printing paper of the printer device.

FIG. 4 is a flowchart showing an operation of detecting the remaining number of print sheets.

[Explanation of symbols]

1 ... Printer device, 2 ... CPU, 3 ... Program memory, 4 ... Work memory, 5 ... Non-volatile memory, 6 ... Image memory, 7 ... Communication interface, 8 ... Print information storage device, 9 ... Clock circuit 10 ... Console panel, 11
... engine interface, 12 ... printer engine, 13 ... paper remaining amount sensor, 14 ... dedicated line interface, 15, 16 ... computer, 17 ... data bus, 18 ... network line, 21 ... paper management means, 2
2 ... Necessary paper amount detection means, 23 ... Comparison means, 24 ... Time prediction means, 25 ... Display means, 26 ... Data amount detection means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Narumi Kaneko, 3-7-1, Fuchu, Iwatsuki-shi, Saitama Prefecture Fuji Zerox Co., Ltd. (72) Kazutoshi Suzuki, 3-7-1, Iwatsuki City, Saitama Prefecture Inside Fuji Xerox Co., Ltd.

Claims (5)

[Claims] 1. A printer apparatus comprising: a storage unit that stores input print information; and a printer engine that prints the print information on a sheet; a sheet management unit that manages the remaining amount of the sheet; Prior to printing the information, the necessary paper amount detecting means for detecting the printing paper amount necessary for printing the print information, the comparing means for comparing the printing paper amount and the remaining paper amount, and the comparing means As a result of the comparison, when the remaining amount of paper is less than the amount of printing paper, a time prediction unit that predicts the time required to output the print information for the remaining amount of paper, and a prediction value by the time prediction unit A printer device comprising: a display unit that displays the time when the paper runs out. 2. A printer device for printing print information transmitted from a plurality of data processing terminals connected via a network line, wherein the communication means communicates with the data processing terminal, and the paper out time is transmitted. Destination setting means for setting a data processing terminal, protocol setting means for setting a protocol corresponding to the data processing terminal, creating means for creating the content of the paper out time in a format corresponding to the protocol, the protocol The printer device according to claim 1, further comprising: a transmission unit that transmits the content of the paper run-out time to the data processing terminal by using the. 3. A printer device for printing print information transmitted from a data processing terminal connected via a dedicated line, a communication means for communicating with the data processing terminal, and data processing for the contents of the paper out time. The printer device according to claim 1, further comprising: a transmitting unit that transmits the data to a terminal. 4. The sheet usage amount detecting means for detecting that the thickness of the sheet bundle during the output period of the sheets stored in the sheet tray has changed by a predetermined amount, and the sheet remaining amount managing means, Paper counting means for counting the number of paper sheets output while the predetermined amount is changed, paper thickness calculating means for calculating the thickness of the paper from the value counted by the paper counting means, and the paper thickness calculating means. 4. The remaining sheet number calculating means for calculating the remaining number of sheets from the thickness of the sheets calculated in step 1 and the thickness of the bundle of sheets remaining in the sheet tray. The printer device according to 1. 5. The paper remaining amount management means detects the amount of change in the thickness of the sheet bundle during a period in which the planned number of sheets is output, and the planned number of output sheets and the remaining number of sheets. A paper thickness calculating unit that calculates the thickness of the paper from the change amount of the thickness of the paper stack, and a paper thickness calculation unit that calculates the thickness of the paper based on the thickness of the paper calculated by the paper thickness calculating unit and the thickness of the paper stack remaining in the paper tray. The printer device according to any one of claims 1 to 3, further comprising: a remaining sheet number calculating unit that calculates the remaining number of sheets.