JP2003072033A - Stencil printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stencil printer capable of informing a residual lack of expendable supplies so as not to replace the supplies on the way of a printing operation and a deterioration of a quality. SOLUTION: The stencil printer comprises an original sensing means for sensing the number of original sheets, a number-of-total printing sheets calculating means for calculating the total number of the printing sheets until printing of all the original sheets is finished from the number of the originals sensed by the original sensing means and the number of the prints, at least one residue sensing means for detecting a residue or a quality of expendable supplies to be used or expended at a printing time, a printable number calculating means for calculating the number of printable sheets printable from the residue or quality of the sensed supplies sensed by the residue sensing means, and a comparison alarm means for comparing the total number of the printed sheets calculated by the number-of-printing sheets calculating means with the number of the printable sheets calculated by the printable number calculating means to output an alarm signal if the total number is larger.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printing machine, and more particularly, to a stencil printing machine capable of notifying an operator of the remaining amount and deterioration degree of consumable supplies.

[0002]

2. Description of the Related Art Conventionally, when ink, printing paper, master rolls for plates, etc., which are consumed as printing progresses, are used up, or when the amount is less than a predetermined amount, or a predetermined number of times or time is exceeded. Therefore, there is a stencil printing machine capable of displaying a warning and notifying the operator, who is the user of the printing machine, of the fact that the consumable parts are deteriorated.

When such a display is made, the operator stops the operation of the printing machine even during printing, replaces the consumable item that caused the warning, and restarts printing.

In a stencil printing machine, since the number of printed sheets for one original is large and the operator often leaves his / her place after printing, the consumables are exhausted and the printing is stopped without being noticed. There are cases.
In that case, time is wasted.

[Problems to be Solved by the Invention]

Therefore, the technical problem to be solved by the present invention is to provide a stencil printing machine capable of notifying the shortage of the amount of consumables and the deterioration of quality so as not to replace the consumables during the printing operation. Is to provide.

[0006]

The present invention provides a stencil printing machine having the following constitution in order to solve the above technical problems.

The stencil printing machine is of a type in which original papers to be printed are fed one by one to create a stencil, and a predetermined unit print number per original paper is continuously printed. . Then, a document detecting unit that detects the number of the document sheets, a number of documents detected by the document detecting unit, and a total number of prints from the unit print number until all the document sheets are printed Total printing sheet number calculating means, remaining amount detecting means for detecting the remaining amount or quality of consumable items used at the time of printing, and printable number of printable sheets from the remaining amount of consumable items detected by the remaining amount detecting means. A printable sheet number calculating means for calculating
The comparison and warning unit compares the total number of prints calculated by the number-of-printed-sheets calculation unit with the printable number calculated by the number-of-printed-sheets calculation unit, and outputs a warning signal if the total number of printed sheets is large.

In the above structure, the stencil printing machine feeds the original paper, which is an original read by optical means to form a stencil, one by one, and then discharges the paper.
This is a printing machine equipped with an automatic paper feed unit. And
The number of original sheets to be printed is detected by the original detecting unit. The total number of printed sheets is calculated by multiplying this by the unit number of printed sheets per sheet. The unit print number per sheet is manually input by, for example, an operation of the operator of the printing press.

The remaining amount detecting means detects the remaining amount or quality of each consumable item. The consumables can be exemplified by those which are used in the printing operation and whose amount is reduced, such as printing paper and ink. Further, it also includes parts such as a plate cylinder and a filter that are not consumed during printing but deteriorate in quality during use and affect the quality of printing.
Therefore, the remaining amount detecting means detects the remaining amount and quality of the consumable item. The quality of a consumable item can be processed, for example, by storing the total operation time after replacement of the component and the number of hours. At least one remaining amount detecting means can be provided at an arbitrary position of the stencil printing machine, and a plurality of remaining amount detecting means can be provided according to the number of consumables to be detected.

The printable sheet number calculating unit calculates the printable sheet number based on the remaining amount or quality of the consumable item detected by the remaining amount detecting unit. Specifically, as will be described later in detail, the amount of the consumables used for printing per predetermined number of sheets is stored in advance from the remaining amount of the consumables, and the amount is calculated based on this amount. Also, regarding the quality of consumables,
The number of operating hours that can maintain the quality of consumables at a certain standard is stored in advance, and the remaining number of operating hours is derived from the difference from the total operating time, and is calculated based on this. be able to.

The comparison warning means compares the total number of printed sheets calculated by the printed sheet number calculating means with the printable sheet number calculated by the printable sheet number calculating means. As a result, if the number of printable sheets for an arbitrary consumable item is less than the total number of printed sheets printed in the print operation calculated based on the original paper, the consumable item will be exhausted or consumed within the print operation. Deterioration of product quality may reduce print quality. Therefore, if the total number of printed sheets is larger than the printable number, a warning signal is output.

According to the above construction, the printing operation for printing the required number of copies of all the original sheets is based on the number of sheets required for the printing operation, which is derived from the number of original sheets to be printed and the number of copies. It is possible to predict and warn in advance whether there will be a shortage of consumables. Therefore, by following the warning, it is not necessary to replace the consumable item in the printing operation, and it is possible to prevent the printing from being interrupted during the operation.

The stencil printing machine of the present invention can be constructed in various modes as follows.

The remaining amount detecting means includes a paper feed tray position sensor for detecting the position of a paper feed tray on which printing paper is stacked, and a printing paper thickness storage means for storing the thickness of each printing paper. The printable sheet number calculating means detects the thickness of the printing sheet bundle on the sheet feeding table from the position of the sheet feeding table detected by the sheet feeding table position sensor and the end position of the sheet feeding table, The number of print sheets stacked on the paper feed tray is calculated based on the thickness of each print sheet stored in the thickness storage unit, and is output as the printable number.

In the above structure, the remaining amount detecting means detects the number of printing sheets stacked on the sheet feeding table, and detects the position of the sheet feeding table on which the printing sheets are stacked. And a printing paper thickness storage unit that stores the thickness per printing paper. The paper feed tray position sensor detects at which position the paper feed tray is currently located. Based on this information, the printable sheet number calculation means obtains the difference between the end position of the paper feed tray, for example, the maximum height of the paper feed tray and the current position, thereby printing the prints stacked on the paper feed tray. Detect the thickness of a stack of paper.

Further, the thickness of one printing sheet is stored in the printing sheet thickness storage means. The thickness per print sheet may be stored in the print sheet thickness storage means by manually inputting a unique value according to the type of print sheet, for example, for the sheets stacked on the paper feed table. Of these, a predetermined number of sheets may be passed through before the start of printing, and may be calculated based on the amount of movement of the paper feed tray. The printable sheet number calculating means calculates the number of print sheets stacked on the paper feed tray by dividing the thickness of the bundle of print sheets stacked on the paper feed tray by the thickness per print sheet. .
The number of print sheets is directly output as the printable number.

According to the above configuration, the number of printing sheets can be known in advance, and the size of the original sheets can be compared with that of the printing sheets required for printing all the original sheets. Then, when the number of print sheets required for printing is larger than the number of print sheets on the paper feed tray, it can be warned in advance that the print sheets need to be replenished during the printing operation. Therefore, it is possible to notify that the consumables are insufficient and the quality is deteriorated so as not to replace the consumables during the printing operation.

Preferably, the remaining amount detecting means includes an operating time storing means for counting and storing an operating time of an ink pump for sending ink from an ink pack for storing print ink, and the printable sheet number calculating means, Based on the operating time of the ink pump stored in the operating time storage means, the remaining amount of ink in the ink pack is calculated, and the number of print sheets that can be printed with this remaining ink amount is calculated as the printable number. Output.

In the above structure, the remaining amount detecting means detects the remaining amount of the printing ink, and stores the operating time for counting and storing the operating time of the ink pump for feeding the ink from the ink pack storing the printing ink. Means are provided. The information on the ink pump operating time is the total operating time from when the ink pack is replaced. The printable sheet number calculating means calculates the remaining amount of ink in the ink pack based on the information on the operating time of the ink pump. The remaining ink amount can be calculated, for example, by pre-storing the operating time of the ink pump required to send out all the ink stored in the ink pack and guiding it by the ratio of the operating time of the ink pump to this. it can. Then, the printable sheet number calculating means calculates the printable sheet number based on the remaining amount of the printing ink in the ink pack. Specifically, information about how many printing sheets can be printed when the ink pack is completely filled is stored in advance, and the value is calculated based on the ratio of the remaining amount of ink in the ink pack. The number of printable sheets is directly output as the number of printable sheets.

With the above arrangement, the remaining amount of printing ink can be known in advance, and the amount of ink required to print the entire manuscript paper can be compared with that of the original ink. Then, if the number of printing sheets required to print all the original paper is larger than the number of sheets that can be printed with the remaining amount of ink, it can be warned beforehand that ink needs to be replenished during the printing operation. . Therefore, it is possible to notify that the consumables are insufficient and the quality is deteriorated so as not to replace the consumables during the printing operation.

[0021] Preferably, the remaining amount detecting means is a plate making unit for making a stencil from the replacement base paper with a thermal head, and a plate making storage means for storing the number of plate making times after the replacement base paper is replaced, and a plate making storage. A plate making calculation means for calculating the number of remaining plate making that the exchange base paper can make a plate based on the number of plate making stored in the means,
The printable sheet number calculating unit prints all the original sheets based on the number of printable sheets that can be printed from one stencil sheet, the number of unit print sheets per original sheet, and the number of original sheets detected by the original sheet detecting unit. To calculate the total number of stencil required, the comparison warning means, by comparing the total number of stencil calculated by the printable number calculation means, and the remaining plate-making number calculated by the plate-making calculation means, If the total number of stencil plates is large, a warning signal is output.

In the above construction, the remaining amount detecting means is for detecting how many more stencil sheets can be made from the replacement base paper in the plate making unit for making the stencil from the replacement base paper by the thermal head. Plate making storage means for storing the number of plate makings made from the time of exchanging the replacement base paper, and plate making calculation means for calculating the number of remaining plate makings that can be made by the exchange base paper based on the number of plate makings stored in the plate making storage means Equipped with. The plate-making storage means stores the number of times the stencil was made from the replacement base paper after the replacement base paper was replaced. The plate-making calculation means stores, for example, in advance information on how many times the plate can be made by the exchange base paper, and the difference between the number of times and the number of plate-making times stored in the plate-making storage means gives the exchange base paper. Calculate the remaining number of plates that can be made.

The printable sheet number calculating means calculates the number of printable sheets from one stencil sheet, the number of unit print sheets per original sheet, and the number of original sheets detected by the original sheet detecting means. Calculate the total number of stencil sheets required to print the paper. Specifically, if five stencil sheets need to be replaced after printing, if the number of prints is 6, two stencil sheets are required for each original sheet. If the number of manuscript papers is 20, two stencil plates are required for each manuscript paper sheet, so that 40 stencil plates are required, and the total number of stencil plates is 40.

The comparison warning means compares the total number of stencil sheets calculated by the printable sheet number calculating means with the remaining number of stencil sheets calculated by the plate making calculation means, and outputs a warning signal if the total number of stencil sheets is large. To do. That is, calculated by the printable number calculation means, comparing the number of stencil sheets necessary for printing the required number of copies of all original paper and the number of stencil plates that can be plate-making by the replacement base paper calculated by the plate-making calculation means, If the number of stencil plates that can be plate-formed is small, it is necessary to replace the replacement base paper in the printing operation, and this can be warned in advance. Therefore, it is possible to notify that the consumables are insufficient and the quality is deteriorated so as not to replace the consumables during the printing operation.

Preferably, the remaining amount detecting means is a storage unit for storing the number of times the used stencil has been collected on a plate discharge roll in a plate making unit for making a plate for replacement base paper with a thermal head And a remaining recovery calculation means for calculating the remaining recovery number of the stencil that can be recovered by the stencil discharge roll based on the number of times the stencil is recovered, and the printable number calculation means is capable of printing from one stencil. The total number of stencil sheets required to print all the original papers is calculated based on the number of prints and the unit number of prints per original paper, and the number of originals detected by the original detection means, and the comparison warning means. Compares the total stencil sheet number calculated by the printable sheet number calculating unit with the remaining collected sheet number calculated by the remaining sheet collecting calculating unit,
If the total number of stencil plates is large, a warning signal is output.

In the above structure, the remaining amount detecting means is for detecting how many used stencil sheets can be collected in the plate discharging roll in the plate making unit for making the plate for the replacement base paper with the thermal head. A collection storage unit that stores the number of times the used stencil is collected, and a remaining collection calculation that calculates the number of remaining stencil plates that can be collected by the plate discharge roll based on the number of stencil collections stored in the collection storage unit. And means. The collection storage means stores the number of times the used stencil is collected on the plate discharge roll after the plate discharge roll is replaced. The residual recovery calculating means stores, for example, in advance information on how many used stencil can be recovered by the plate discharging roll, and by calculating the difference between the number and the number of recovery times stored in the recovery storing means. Calculate the remaining number of used stencil plates that can be collected by the plate discharge roll.

Similar to the above, the printable sheet number calculating means calculates the printable sheet number from one stencil sheet, the unit print sheet number per original sheet, and the number of original sheets detected by the original sheet detecting section. The total number of stencil sheets required to print all the original papers is calculated. The comparison warning unit compares the total number of stencil sheets calculated by the printable sheet number calculation unit with the remaining collected sheet number calculated by the remaining sheet collection calculation unit, and outputs a warning signal if the total number of stencil sheets is large. That is, the number of stencil sheets, which is calculated by the printable sheet number calculating means and is necessary for printing the required number of copies of all original sheets, is compared with the number of stencil sheets that can be collected by the plate discharge roll, which is calculated by the remaining collection calculating means. If the number of stencil sheets that can be collected is small, it is necessary to replace the plate discharge roll in the printing operation, and this can be warned in advance. Therefore, it is possible to notify that the consumables are insufficient and the quality is deteriorated so as not to replace the consumables during the printing operation.

In each of the above constructions, preferably, in the stencil printing machine, when the comparison warning unit determines that the total number of printed sheets is large, the total number of printed sheets is calculated by the printable sheet number calculating unit. A unit number calculation unit for newly calculating and outputting the second unit number of prints that falls within the printable number range is provided.

In the above construction, when the comparison warning means determines that the total number of prints required to print the required number of originals is larger than the number of prints that can be printed with the remaining amount of the consumables, in the middle of the process. A warning is given to replace the consumable item. In the above configuration, together with this warning, in order to reset the required number of copies that can be printed, the second unit print number is set so that it falls within the range of the printable number that can be printed with the remaining amount of consumables. Calculate and output. The second unit print number can be derived, for example, by dividing the printable number, which is the number that can be printed by the remaining amount of the consumable item, by the number of document sheets detected by the document detection unit.

According to the above configuration, the number of print copies can be reset so that the number of printable sheets is within the range of printable number depending on the remaining amount of the consumable item. Therefore, the consumable item is replaced during the printing operation. You don't have to. Therefore, it is possible to prevent the printing from being interrupted during the operation.

[0031]

DETAILED DESCRIPTION OF THE INVENTION A stencil printing machine according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the construction of a rotary stencil printing machine according to an embodiment of the present invention. The rotary stencil printer 1
It is composed of a plate making unit 2 and a printing unit 3.

In the plate making unit 2, the original sheets stacked on the original feeding table 30 are taken in one by one, read by an optical means or the like to be signalized, and this signal is transmitted to the printing unit 3. The plate making unit 2 is provided with an ADF unit 4 for reading document sheets one by one. The ADF unit is provided with a sensor for detecting the number of document sheets stacked on the document feeding table 30. This will be described in detail later.

The printing unit 3 creates a stencil based on the information obtained by converting the original paper into a signal by the plate making unit 2, and prints the paper 9 stored in the paper feed table 45 of the main body 3 in a stacked state. The plate making unit 3 is provided with a paper feeding unit 7, which can separate and feed sheets of paper that are superposed on the paper feeding table one by one. That is, the printing paper 9 on the paper feed table is fed by the auxiliary roller 16 to the paper feed roller 1.
5, and the sheets are separated and conveyed one by one by the separation plate 17 and the paper feed roller 15. On the way, after being pressed against the plate cylinder 38 by the press roller 21 for printing, the paper tray 24
Be transported to.

A drum unit 6 is provided near the plate cylinder 38 to appropriately supply printing ink to the plate cylinder. As will be described later, the drum unit 6 is provided inside the plate cylinder 38 and sends an appropriate amount of ink from the ink pack that stores printing ink into the plate cylinder. By adjusting this amount, the press roller Plate cylinder 3 by 21
The print density of the 9 printing paper pressed against 8 can be adjusted appropriately.

A paper passage detection sensor 18 and a pair of upper and lower rollers 19 and 20 are arranged in front of the plate cylinder 38. The paper passage detection sensor 18 is a transmissive sensor in which a light emitting portion and a light receiving portion are arranged with the conveyance path sandwiched therebetween, and detects light shielding due to passage of the paper. A pair of upper and lower rollers 19, 20
Of these, the lower feed roller 20 is arranged at a predetermined position with respect to the apparatus main body 11 and is rotationally driven at an appropriate timing. Upper feed roller 19
As will be described later in detail, is rotatably supported and is disposed so as to come in contact with and separate from the feed roller 20. The feed roller 20 rotates at an appropriate timing in synchronization with the rotation of the plate cylinder 38, and sends the paper 9 to the plate cylinder 38 so that the paper 9 can be printed at a predetermined position. After the paper is pinched between the plate cylinder 38 and the press roller 21, the feed roller 19 moves upward so as not to be pinched by the rollers 19 and 20 and constrained, and is separated from the feed roller 20. It is like this.

Further, the plate making unit is provided with a plate feeding unit 5 for appropriately supplying a stencil sheet prepared based on a signal from the plate making unit. The plate feeding unit sends the master roll 5a onto the thermal head 10 by means of a sponge roller, makes a plate by the thermal head 10 based on the original signal from the plate making unit, and a stencil cut into a predetermined length is attached to the plate cylinder 38. Attached.

Further, the plate making unit 3 is provided with a plate discharge unit 8. In the plate discharge unit 8, the stencil stuck to the plate cylinder 38 is removed, sent by the plate discharge roller 14, and wound around the plate discharge roll 13 to be collected.

The paper peeling claw 12 and the air blower 25 are provided between the plate cylinder 38 and the paper tray 24. Paper peeling nail 12
Is caught on the paper attached to the plate cylinder 38 (specifically, the stencil attached to the plate cylinder 38) and peels off the paper.
The blower unit 25 blows air between the paper peeling claw 12 and the paper to facilitate the separation of the printing paper from the plate cylinder 38.

Between the plate cylinder 38 and the paper receiving tray 14, there is provided a paper discharging means for carrying the printed paper. That is, the paper discharge belt is arranged so that the upper portion of the paper discharge belt circulates so as to move along the paper transport path. A large number of through holes are formed in the paper discharge belt, and a fan unit 23 for sucking air by a paper discharge fan is arranged below the upper portion of the paper discharge belt. The fan unit 23 adsorbs the upper printed sheet onto the sheet discharge belt through the through hole of the sheet discharge belt. The attracted paper is conveyed to the paper tray 24 by the rotation of the paper discharge belt. At this time, the printing surface of the paper is up.

The jam detection sensor 22 is arranged between the plate cylinder 38 and the paper discharge belt. Jam detection sensor 22
Is a transmissive sensor similar to the paper passage detection sensor 18 and detects the interval between the papers so that it is possible to monitor whether jamming such as paper jam after printing has occurred. Has become.

FIG. 2 shows the structure of the ADF unit used in the rotary stencil printing machine of FIG. ADF unit 4
Has a mechanism for separating and feeding the original papers 31 stacked on the original feed table 30 inside the upper cover 32 one by one. That is, the original paper 31 of the original feeding table 30
Are separated one by one by the paper feed roller 35 and the separation stand 34, and are conveyed on the guide 36 by a pair of conveying rollers 37 as shown by the arrow. The conveyed document paper is converted into a signal by an optical means (not shown) or the like.

The ADF unit 4 is provided with an optical reflection type displacement sensor 33 used to detect the number of sheets stacked on the document feeding table 30. The optical reflection type displacement sensor 33 irradiates the upper surface of the original paper with light and detects the reflected voltage level, thereby detecting the stacking height of the original paper feed table 30 from the paper mounting surface. From the stacking height to the original feed table 30
It is possible to calculate the thickness of a stack of original sheets stacked on top. If the thickness per original sheet is input in advance by manual input by the operator, the number of original sheets can be roughly calculated from the thickness of the original sheet bundle. It is also possible to calculate the thickness of each original sheet by passing a predetermined number of original sheets in advance and taking the difference in the stacking height before and after the passage. Note that the calculation of the thickness and number of sheets of these original sheets is
As will be described later, it is performed by the main control unit that controls the entire rotary stencil printing machine, and the ADF unit does not include a calculation unit. Therefore, the information on the stacking height from the optical reflection type displacement sensor 33 is output to the CPU. In addition, AD
The detection of the number of original sheets by the F unit is performed when the printing operation is started.

FIG. 3 shows the structure of a drum unit used in the rotary stencil printing machine of FIG. Drum unit 6
Is for guiding the printing ink stored in the ink pack 39 to the plate cylinder 38, most of which is the plate cylinder 38.
It is housed inside. That is, ink is supplied from the ink pack 39 provided on the side of the plate cylinder 38 to the ink roller 43 through the ink supply pipe 41. An ink pump 40 is provided near the ink pack 39,
It is driven by receiving a signal from the main controller of the rotary stencil printing machine. By driving the ink pump 40, the ink stored in the ink pack 39 is supplied through the ink supply pipe. Whether or not sufficient ink is supplied to the ink roller 43 is determined by the ink sensor 42, and the signal detected by the ink sensor 42 is transmitted to the main control unit of the rotary stencil printing machine. A squeegee 44 is provided in parallel with the ink roller 43, and the ink density can be changed by adjusting the gap between the squeegee 44 and the ink roller 43.

The operation of the ink pump 40 is performed by the main controller of the rotary stencil printing machine as described above. The main control unit has a counter for the operating time of the ink pump, and stores the total operating time of the ink pump 40 in the storage means. This process is performed to detect the amount of ink remaining in the ink pack 39.

FIG. 4 and FIG. 5 show a paper feeding unit used in the rotary stencil printing machine of FIG. The paper feeding unit 7 is composed of a paper feeding table raising / lowering mechanism 7a and a paper feeding table detecting mechanism 7b for detecting the timing of raising / lowering the paper feeding table. FIG. 4 shows the structure of the paper feed tray lifting mechanism, and FIG. 5 shows the structure of the paper feed tray detection mechanism.

The paper feed table raising / lowering mechanism 7a includes a motor 46, a chain 51, sprockets 49 and 50, and a spring 52. One end of the chain 51 is fixed to the paper receiving tray 45, extends upward from the paper receiving tray 45, and meshes with a guide sprocket 50 provided above the upper limit position of the paper receiving tray 45 to extend downward, It engages with a drive sprocket 49 provided at the other end, and the other end is always pulled upward by a spring 52. When the drive sprocket 49 is rotated by the motor 46 via the speed reduction mechanism (worm gear 47 and worm wheel 48), one end of the chain 51 moves up or down, whereby the paper tray 45 moves up and down.

The chain 51 has a light-shielding plate 5 in the middle thereof.
4 is provided and when the chain is driven because the paper feed table 45 moves up and down, the position of the chain is changed in association with the chain. Sensors 53a and 53b are provided at the highest position and the lowest position where the light shielding plate 54 is located when the paper feed tray is located at the lower limit and the upper limit, respectively. Sensor 5
Reference numerals 3a and 53b denote transmissive sensors in which a light emitting portion and a light receiving portion are respectively arranged, and detect the light shielding due to the light shielding plate 54 being located between the light emitting portion and the light receiving portion.

As shown in FIG. 5, the paper feed tray detection mechanism 7b detects the timing and amount of rise of the paper feed tray 45, and is fixed to the paper feed roller 15, the auxiliary roller 16, and the auxiliary roller 16. It includes a detection arm and a photo interrupter. Further, on the upper surface of the paper feed table 45, a stacked paper sensor 59 for determining the presence / absence of the printing paper 9 is provided. The paper feed roller 15 is a roller that is rotatably driven by being supported by a shaft that is fixed to an axis. The paper feed roller 15 is arranged at one end of the paper feed table together with the separation plate 17, and one sheet of paper is placed on the paper feed table in order from the top. It mainly has a role as a sheet separating means for separating the sheets into the printing machine through the guide 57. On the other hand, the auxiliary roller 16 is a roller that is driven to rotate independently of the paper feed roller 15, and is supported by a shaft 58 attached to the detection arm 55. The detection arm 55 can rotate about its rotation center 56, and as a result, the auxiliary roller 16 can move up and down together with the detection arm.

A driving force is transmitted to the auxiliary roller through a fixed driving shaft 58. The auxiliary roller 16 is a paper feed table 45.
The uppermost sheet of the sheets 9 stacked on the sheet is in contact with the surface of the sheet 9 with a constant pressure. Since the auxiliary roller 16 is driven to rotate independently of the paper feed roller 15, the auxiliary roller 16 is always brought into contact with the paper at a constant pressure without being affected by the moment associated with the rotation of the paper feed roller 15. be able to. Therefore, it is possible to solve problems such as double feeding and insufficient feeding force in sheet feeding. Further, it becomes possible to independently control the speed and timing of the auxiliary roller.

The auxiliary roller 16 functions as a feeding means that rotates to feed the sheet to the vicinity of the contact point between the outer peripheral surface of the sheet feeding roller 15 and the separating plate 17. Detection arm 55
A photo interrupter 60 is provided near the end opposite to the rotation center of the. The photo interrupter 60 is
Auxiliary roller 16 along with the movement of the elevator type paper feed table 12
The position of the auxiliary roller 16 is detected in order to bring the sheet of paper into contact with the uppermost sheet of paper with a constant pressure.

When it is determined by the stacked paper sensor 59 on the upper surface of the paper feed tray 45 that the paper is being loaded, the paper feed tray 45 is lowered to the lowest limit so that the operator can easily load the paper. At this time, whether or not the paper feed tray is located at the lowest limit is determined by whether or not the elevator lower limit sensor 53b is shielded by the light shielding plate 54. When, for example, the start switch is pressed after the sheets are stacked, the paper feed table 45 is raised to a level at which paper can be fed. Whether or not the sheet can be fed is determined by whether or not the photo interrupter 60 is shielded from light. That is, the auxiliary roller 16 comes into contact with the sheet as the sheet feeding table 45 moves up, and when the sheet feeding table 45 further moves up, the detection arm 55 moves up together with the auxiliary roller 16. When the light blocking of the photo interrupter 60 by the detection arm 55 is released, the raising of the paper feed tray 45 is stopped.

After the start of printing, during the printing operation, the auxiliary roller 16 is urged downward by its own weight, and the uppermost sheet and the auxiliary roller 16 are always in contact with each other by the pressure of their own weight.
As the printing progresses and the number of sheets of paper placed on the paper feed table 45 decreases, the detection roller 55 moves along with the auxiliary roller 16.
Also comes down. Then, when the photo interrupter 60 is shielded from light by the detection arm 55, the paper feed table 45 moves up until the shield is released. In this way, the paper feed table 45
Rises with the consumption of paper, and when the paper feed table 45 reaches the upper limit position, the elevator upper limit sensor 53a operates, and the main control device which receives this outputs a signal indicating that the paper is to be fed.

In the paper feeding unit having the above structure, the amount of movement of the paper feeding table 45 is counted by the main control means. That is, the ascending distance from the lowest limit to the level at which paper can be fed is calculated by counting the encoder pulses that are interlocked with the motor 46, and is subtracted from the total stroke distance that the paper feeding table 45 can ascend. The thickness of the printing sheet bundle stacked on the table 45 is calculated. Further, the number of sheets stacked on the sheet feeding table 45 can be calculated by manually inputting the thickness per printing sheet by an operator or the like and storing it in advance. Further, the thickness per sheet of printing paper may be calculated by passing a predetermined number of sheets of printing paper prior to the printing operation and detecting the movement width of the paper feed size that occurs at that time.

FIG. 6 is a block diagram showing the electrical construction of the rotary stencil printing machine of FIG. Operation panel 6 on the main body
1, an ADF unit 4, a paper feed unit 7, an ink pump 40, a plate supply unit 5, a plate discharge unit 8 and the like are provided. These are CPUs via I / O ports (not shown)
It is connected to (central processing unit) 66 and controlled. The CPU 66 includes a ROM 62 (read only memory) and a RAM (random access memory) 6
3, EEPROM (electrically erasable and writable memory)
64, switches of the operation panel 61, and a mechanical section (not shown) of the printing machine body are also connected. The CPU 66 sets the number of copies to be printed, that is, the number of prints per document sheet, by operating the buttons provided on the operation panel 61, and then presses the start button to set a predetermined number from these blocks. A signal is received and various operations are performed based on the signal to control each block.

The EEPROM 64 has a maximum number of times the predetermined mechanical section has operated to detect the remaining amount of consumables or the arrangement position of each block, the total number of hours, and the maximum amount of each consumable until the consumable is used up. The number of times of use and the number of print copies input by the operator are stored.

FIG. 7 shows the storage area of the EEPROM 64. The EEPROM 64 has a maximum operating time storage area 64a, which is an operating time of the ink pump required to send out the entire amount of ink stored in the ink pack to the ink roller, and an ink for detecting the remaining amount of ink in the ink pack. An operation time storage area 64b, which is a counter value of the total number of hours that the pump has actually operated, is provided. Further, in order to detect the remaining amount of printing paper, a printing paper thickness storage area 64d for storing the thickness of one printing paper, and the number of printing papers calculated from the thickness of the paper bundle and the thickness of one printing paper are stored. The number of print sheets storage area 64c is provided. Further, in order to detect the number of stencil plates that can be plate-formed with the replacement base paper, a maximum plate-making number storage area 64e that stores the number of stencil plates (the number of plates) that can be plate-made with the exchange base paper and the number of times (the number of plates) that have been plate-made from the replacement base paper A plate making count storage area 64f is provided. Further, in order to detect the remaining amount of the stencil that can be discharged to the stencil roll, the maximum number of stencil storage area 64g that stores the maximum number of stencil that can be collected on the stencil roll (the number of stencil discharges) and the use collected by the stencil roll. Storage area 6 for the number of discharged plates for storing the number of completed stencil plates
4h are provided. Other storage areas may be provided in the EEPROM 64.

The CPU 66 will be described below with reference to FIGS. 8 to 11.
The control of each block in the print processing performed by the above will be described. The processes of FIGS. 8 to 11 are not selectively performed, and are almost immediately executed in parallel when the print start process is performed by the operator. In the above process, the detection of the number of original sheets by the ADF unit 4 is common, and therefore the explanation will be given on the assumption that the calculation of the number of original sheets has already been completed. FIG. 8 is a flowchart showing the flow of the printing process regarding the remaining ink amount. As a premise of this processing, it is necessary that the CPU 66 be ready to detect the remaining ink amount in the ink pack 39. The detection of the remaining ink amount is calculated based on the total operation time of the ink pump 40 as described above.

The detection of the remaining amount of ink is performed through the following processing. When the ink pack is replaced, first, the CPU 66
Check the type of ink pack. Based on the information stored in the ROM 62, the information about how many sheets of paper can be printed by this ink pack and the operating time of the ink pump until the ink stored in the ink pack is used up are read out, It is stored in the maximum operating time storage area 64a of the EEPROM 64. In addition, the EEPROM 64
The information stored in the operating time storage area 64b is reset and returns to zero. When this process ends, the remaining ink amount can be detected. Then, when the printing machine operates and the ink pump 40 operates, the EEPROM
64 the ink of the ink pack to the ink roller 4
The number of times that the ink pump 40 is driven to send to the No. 3 is counted, and this counter value is stored in the operation time storage area 64b of the EEPROM 64.

In the process of detecting the remaining amount of ink remaining in the ink pack 39 in step 10, E
Depending on the ratio of the operation time of the ink pump stored in the ink pack stored in the maximum operation time storage area 64a of the EPROM 64 until the ink is used up and the counter value stored in the operation time storage area 64b of the EEPROM 64, Calculate the remaining amount. Further, when the ratio is calculated, information on how many sheets of paper can be printed is calculated based on the ink remaining amount of the ink pack 39, and the RAM 63
Memorized in.

Next, the CPU 66 calculates at step 11 the number of prints set by the operator, that is, the number of prints per one original paper multiplied by the number of original papers detected by the ADF unit 4 and the previous step 10. The number of sheets that can be printed with the remaining ink amount is compared (step 11). When it is determined that the latter is large as a result of the comparison, the CPU 66 activates each mechanical unit of the printing press to start printing with the number of prints set by the operator (step 12). When printing is started, the printing process is repeated until printing of the set number of sheets is completed (step 1
3) When the printing of all the manuscript papers is completed, the printing process is completed.

If it is determined in step 11 that the former, that is, the number of prints set by the operator is large, the CPU 66 calculates in step 14 the number of printable ink remaining inks. Specifically, the integer part of the quotient obtained by dividing the number of printable sheets with the remaining ink amount calculated in the previous step 10 by the number of document sheets guided by the sensor of the ADF unit 4 is calculated as a new print copy number. The information on the new number of copies is output from the CPU 66,
You may make it display with a warning display on a display panel etc.

The operator determines whether or not to print with the new number of copies, and operates the operation panel 61 (step 15). When the operator decides to execute printing with the newly calculated number of prints, operates the button for that, and sends the signal to the CPU 66,
The CPU 66 continues printing until printing of the newly set number of sheets is completed (step 13).

On the other hand, when the operator judges that printing will not be executed with the newly calculated number of prints and operates the button for that, the signal is sent to the CPU 66 and a warning is displayed. More specifically, a consumable item, that is, a message prompting the replacement of the ink pack or the number of sheets is output and displayed (step 16).

FIG. 9 is a flow chart showing the flow of the printing process regarding the remaining amount of printing paper. As a premise of this processing, it is necessary that the CPU 66 be ready to detect the remaining amount of printing paper remaining on the paper feed tray 45. As described above, the detection of the remaining amount of printing paper is calculated based on the position of the paper feed table, that is, the thickness of the sheet bundle stacked on the paper feed table.

The detection of the remaining amount of printing paper is performed through the following processing. When printing paper is placed on the paper feed table, the CPU 66
As described above, the paper feed tray is operated to confirm the position of the paper feed tray based on the program stored in the ROM 62. Then, by subtracting the current height of the paper feed tray 45 from the maximum height, the thickness of the printing paper stack stacked on the paper feed tray 45 is calculated. Further, the operator operates the operation panel 61 in advance to input the thickness per sheet of printing paper, and the printing paper thickness storage area 64 of the EEPROM 63.
Store in d. When this process ends, the remaining amount of printing paper can be detected. The CPU 66 uses the information about the thickness of the bundle of printing sheets and the thickness of each sheet of printing sheet to determine the sheet feeding table 4
Calculate the number of sheets stacked on 5 (Step 2
0) Store in the print sheet number storage area 64c of the EEPROM 64.

When the detection of the remaining amount of the printing paper placed on the paper feed table 45 in step 20 is completed, then C
The PU 66 sets the number of prints set by the operator in step 21, that is, the number of prints per original paper sheet multiplied by the number of original paper sheets detected by the ADF unit and the remaining ink amount calculated in step 10 above. And the number of printable sheets is compared (step 21).
If the latter is judged to be larger as a result of comparison, the CPU
Reference numeral 66 activates each mechanical section of the printing press to start printing with the number of prints set by the operator (step 22). When the printing is started, the printing process is repeated until the printing of the set number of sheets is completed (step 23), and when the printing is completed for all the original papers, the printing process is completed.

When it is determined in step 21 that the former, that is, the number of prints set by the operator is large, the CPU 66 determines in step 24 that the number of printable sheets is the remaining number of print sheets placed on the paper feed tray 45. To calculate. Specifically, an integer part of the quotient obtained by dividing the number of printable sheets with the remaining print sheet amount calculated in the previous step 20 by the number of document sheets guided by the sensor of the ADF unit 4 is calculated as a new print copy number. The information on the new number of prints may be output from the CPU 66 and displayed together with a warning display on a display panel or the like.

The operator determines whether or not to print with the new print count, and operates the operation panel 61 (step 25). When the operator decides to execute printing with the newly calculated number of prints, operates the button for that, and sends the signal to the CPU 66,
The CPU 66 continues printing until the printing of the newly set number of sheets is completed (step 23).

On the other hand, when the operator judges that printing will not be executed with the newly calculated number of prints and operates the button for that, the signal is sent to the CPU 66 and a warning is displayed. Specifically, a consumable item, that is, a message prompting additional supply of printing paper is output (step 2).
6).

FIG. 10 is a flow chart showing the flow of the printing process regarding the remaining plate-making capacity. As a premise of this processing, it is necessary for the CPU 66 to be ready to detect the remaining number of plate-making possible sheets remaining on the replacement base paper.
As described above, the remaining amount of the replacement base paper is detected by the replacement base paper 4
It is calculated based on the total number of plate making of 0.

The detection of the remaining amount of the replacement base paper is performed through the following processing. When the replacement base paper is replaced, first, the CPU 66 confirms the type of the replacement base paper. Based on the information stored in the ROM 62, information about how many stencil plates can be made with this replacement base paper is read out, and the EEPROM 6 is read.
4 is stored in the maximum plate making count storage area 64e. Also, E
The information stored in the plate-making frequency storage area 64f of the EPROM 64 is reset to zero. When this process is completed, it is possible to detect the remaining plate-making times of the replacement base paper. When the printing press is operated and the stencil is made from the replacement base paper, the number of times (the number of plates) made from the replacement base paper is counted in the EEPROM 64, and this counter value is the plate making count storage area 64f of the EEPROM 64.
Memorized in.

In the process of detecting the number of stencil plates that can be plate-formed with the replacement base paper in step 30, the EEPROM 6 is used.
No. 4, the maximum number of plate making times, which is stored in the maximum plate making number storage area 64e, and the EEPROM
It is calculated by the difference between the counter values stored in the plate making count storage area 64f.

Next, in step 31, the CPU 66 is required to print the number of prints set by the operator, that is, the number of prints per one manuscript paper multiplied by the number of manuscript papers detected by the ADF unit 4. The number of stencil plates is compared with the number of stencil plates that can be made with the replacement base paper calculated in step 30 (step 3).
1). Specifically, one manuscript paper is one stencil sheet, but there are cases where two or more manuscript sheets are required. For example, when it is possible to print only 100 copies of printing paper for one stencil and the number of prints set by the operator is 150, two stencil sheets are required for one original.

As a result of the comparison, when it is determined that the latter is large, the CPU 66 activates each mechanical section of the printing press to start printing with the number of prints set by the operator (step 32). When the printing is started, the printing process is repeated until the set number of printed sheets are finished (step 33), and the printing is finished for all the manuscript papers (step 34).
Then, the printing process ends.

When it is determined in step 31 that the former, that is, the number of stencil sheets required to print the number of print sheets set by the operator is large, the CPU 66 displays the number of printable sheets with the stencil sheet number (step). 35).
By this display, the operator can newly set the printing condition by reducing the number of copies to be printed by one stencil or reducing the number of original sheets.

The operator judges whether or not to execute printing under the new printing condition, and operates the operation panel 61 (step 36). When the operator determines that printing is to be executed under the newly set printing conditions, operates the button for that, and sends the signal to the CPU 66,
The CPU 66 starts printing under the newly set conditions (step 33), and continues printing until the printing ends or there is no replacement base paper (step 34).

On the other hand, when the operator judges that printing will not be executed with the newly calculated number of prints and operates the button for that, the signal is sent to the CPU 66 and a warning is displayed. Specifically, a consumable item, that is, a message prompting the replacement of the replacement base paper is output (step 37).

FIG. 11 is a flow chart showing the flow of the printing process regarding the remaining plate dischargeable amount. As a premise of this processing, it is necessary that the CPU 66 be ready to detect the remaining number of used stencil sheets that can be discharged to the plate discharge roll. As described above, the detection of the remaining amount of the stencil that is prone to be discharged to the plate discharge roll is calculated based on the total number of plate discharges that have been discharged to the plate discharge roll.

The detection of the remaining amount of the stencil that can be discharged onto the plate discharge roll is performed through the following processing. When you replace the plate ejection roll,
First, the CPU 66 reads out information about how many used stencil plates can be discharged to this plate discharge roll based on the information stored in the ROM 62, and the EEPR
It is stored in the maximum plate discharge count storage area 64g of the OM64. Further, the information stored in the plate discharge number storage area 64h of the EEPROM 64 is reset and returns to zero. When this process is completed, it is possible to detect the remaining number of possible plate discharges of the plate discharge roll. Then, the printing machine operates,
When the used stencil is discharged to the plate discharge roll, EEPRO
The number (number of sheets) of the plate discharged to the plate discharge roll is counted in M64, and the counter value is stored in the plate discharge number storage area 64f of the EEPROM 64.

In the process of detecting the number of stencil plates that can be discharged by the plate discharging roll in step 40, the EEPROM is used.
The number of stencil plates (number of sheets) and EEPRO which can be discharged by the plate discharge roll stored in the maximum plate discharge number storage area 64g of 64
It is calculated by the difference between the counter values stored in the M64 plate number storage area 64g.

Next, in step 41, the CPU 66 is required to print the number of prints set by the operator, that is, the number of prints per one original paper sheet multiplied by the number of original paper sheets detected by the ADF unit 4. The number of stencil plates, that is, the number of stencil plates to be discarded, is compared with the number of stencil plates that can be discharged by the plate discharging roll calculated in step 40 (step 41). Specifically, one stencil sheet is ejected for one original document sheet, but the case where two or more stencil sheets are ejected also exists in the same manner as described above.

If the latter is judged to be larger as a result of the comparison, the CPU 66 activates each mechanical section of the printing press to start printing with the number of prints set by the operator (step 42). When printing is started, the printing process is repeated until printing of the set number of sheets is completed (step 43), and printing is completed for all original papers (step 44).
Then, the printing process ends.

If it is determined in step 41 that the former, that is, the number of stencil plates to be discarded for printing the number of prints set by the operator is large, the CPU 66
The number of printable sheets with the relevant stencil number is displayed (step 4).
5). By this display, the operator can newly set the printing condition by reducing the number of copies to be printed by one stencil or reducing the number of original sheets.

The operator determines whether or not to print under the new printing conditions and operates the operation panel 61 (step 46). When the operator determines that printing is to be executed under the newly set printing conditions, operates the button for that, and sends the signal to the CPU 66,
The CPU 66 starts printing under the newly set conditions (step 43), and continues printing until the printing is completed or the plate cannot be discharged to the plate discharge roll (step 44).

On the other hand, when the operator judges that printing will not be executed with the newly calculated number of prints and operates the button for that, the signal is sent to the CPU 66 and a warning is displayed. Specifically, a consumable item, that is, a message prompting replacement of the plate discharge roll is output (step 4).
7).

As described above, the stencil printing machine of the present invention requires all original papers based on the number of original papers to be printed and the number of prints necessary for the printing operation derived from the number of copies. The number of copies to be printed It is possible to predict and warn in advance whether or not there will be a shortage of consumables during the printing operation for printing. In addition, if the remaining amount of consumables such as printing ink and printing paper is not enough to print the number of prints required for the printing operation, the number of prints can be set again within the printable range. , No need to replace consumables during printing operation.

The present invention is not limited to the above embodiment, but can be implemented in various other modes.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a rotary stencil printing machine according to an embodiment of the present invention.

2 is an AD used in the rotary stencil printer of FIG.
It is a figure which shows the structure of F unit.

FIG. 3 is a diagram showing a configuration of a drum unit used in the rotary stencil printing machine of FIG.

FIG. 4 is a diagram showing a structure of a paper feed tray lifting mechanism of a paper feed unit used in the rotary stencil printing machine of FIG.

5 is a diagram showing a structure of a paper feed tray detection mechanism of a paper feed unit used in the rotary stencil printing machine of FIG.

FIG. 6 is a block diagram showing an electrical configuration of the rotary stencil printing machine of FIG. 1.

7 is a diagram showing a storage area of the EEPROM of FIG.

FIG. 8 is a flowchart showing the flow of a printing process regarding the remaining ink amount.

FIG. 9 is a flowchart showing the flow of a printing process regarding the remaining amount of printing paper.

FIG. 10 is a flowchart showing the flow of a printing process regarding the remaining plate-making remaining amount.

FIG. 11 is a flowchart showing the flow of a printing process regarding the remaining plate dischargeable amount.

[Explanation of symbols]

1 Rotary stencil printing machine 2 Plate making unit 3 printing units 4 ADF unit 5 plate supply unit 6 drum unit 7 Paper feeding unit 7a Paper feed table lifting mechanism 7b Paper detection mechanism 8 Plate ejection unit 9 printing paper 10 thermal head 11 Sponge roller 12 Paper peeling nails 13 Plate ejection roll 14 Plate ejection roller 15 Paper feed roller 16 Auxiliary roller 17 Sabaki stand 18 Paper passage detection sensor 19,20 Feed roller 21 Press roller 22 Jam detection sensor 23 Fan unit 24 paper tray 25 Blower 30 Document feeder 31 manuscript paper 32 Top cover 33 Optical reflection type displacement sensor 34 Sabaki stand 35 paper feed roller 36 Guide 37 Conveyor roller 38 plate body 39 ink pack 40 ink pump 41 Ink supply pipe 42 ink sensor 43 Ink roller 44 Squeegee 45 printing paper feeder 46 motor 47 Worm gear 48 worm wheel 49,50 sprockets 51 chains 52 spring 53a Elevator upper limit sensor 53b Elevator lower limit sensor 54 Light shield 55 detection arm 56 center of rotation 57 Guide 58 Support shaft 59 Stacked paper sensor 60 photo interrupters 61 Operation panel 62 ROM 63 RAM 64 EEPROM 65 encoder 66 CPU

Claims (6)

[Claims] 1. A stencil printing machine which feeds manuscript papers to be printed one by one to form a stencil and continuously prints a predetermined unit print number per manuscript paper, A document detection unit that detects the number of document sheets, and a total print number that calculates the number of documents detected by the document detection unit and the total number of prints from the unit number of prints until all the document papers are printed Number of sheets calculating means, at least one remaining amount detecting means for detecting the remaining amount or quality of consumables used or consumed during printing, and printing is possible from the remaining amount or quality of consumables detected by the remaining amount detecting means. The printable sheet number calculating means for calculating the printable sheet number, the total print sheet number calculated by the print sheet number calculating means and the printable sheet number calculated by the printable sheet number calculating means are compared. And stencil printing machine, characterized in that the total number of printed sheets and a comparator warning means for outputting a warning signal larger. 2. The remaining amount detecting means includes a paper feed tray position sensor for detecting a position of a paper feed tray on which print paper is stacked, and a print paper thickness storage means for storing a thickness per print paper. The printable sheet number calculating means detects the thickness of the print sheet bundle on the paper feed tray from the position of the paper feed tray detected by the paper feed tray position sensor and the end position of the paper feed tray, The number of print sheets stacked on the paper feed table is calculated based on the thickness per print sheet stored in the print sheet thickness storage unit, and is output as the printable number. The stencil printing machine according to claim 1. 3. The remaining amount detecting means includes an operating time storing means for counting and storing an operating time of an ink pump for feeding ink from an ink pack storing print ink, and the printable sheet number calculating means for storing the printable sheet number. The remaining ink amount of the ink pack is calculated based on the operating time of the ink pump stored in the operating time storage means, and the number of print sheets that can be printed with this remaining ink amount is calculated and output as the number of printable sheets. The stencil printing machine according to claim 1 or 2, characterized in that. 4. A plate-making storage unit for storing the number of plate-makings made from the time of exchanging the replacement base paper in a plate-making unit for making a stencil from the replacement base paper with a thermal head, and the plate-making storage unit. And a plate-making calculation means for calculating the number of remaining plate-making that can be made by the exchange base paper based on the number of plate-making stored in the printable number calculation means. And, based on the number of unit prints per original paper sheet and the number of originals detected by the original detection means, calculate the total number of stencil sheets necessary for printing all the original papers, and the comparison warning means, The total number of stencil sheets calculated by the printable sheet number calculating means is compared with the remaining stencil sheet number calculated by the plate making calculating means, and a warning signal is output if the total number of stencil sheets is large. The stencil printing machine according to claim 1, wherein the stencil printing machine comprises: 5. The remaining amount detecting means is stored in a collecting storage means for storing the number of times the used stencil is collected on a plate discharge roll in a plate making unit for making a plate for replacement base paper with a thermal head, and stored in the collecting storage means. And a remaining recovery calculation means for calculating the remaining recovery number of the stencil that can be recovered by the stencil discharge roll, based on the number of stencil recovery times, the printable number calculation means is a printable printing from one stencil The total number of stencil sheets required for printing all the original papers is calculated based on the number of sheets and the unit number of prints per original paper, and the number of originals detected by the original detection unit. , Comparing the total number of stencil sheets calculated by the printable sheet number calculating unit with the remaining collected sheet number calculated by the remaining sheet collecting calculating unit, and if the total number of stencil sheets is large, a warning signal Is output.
4. The stencil printing machine according to any one of 4 to 4. 6. When the comparison warning unit determines that the total print number is large, the total print number falls within the range of the printable number calculated by the printable number calculating unit. The stencil printing machine according to any one of claims 1 to 5, further comprising unit number calculation means for newly calculating and outputting the unit printing number of 2.