JPS60180882A - Detector for number of printed sheets in plate-making printing system - Google Patents

Abstract

PURPOSE:To easily perform appropriate inventory control of original printing plates and printing papers, by a method wherein the number of original printing plates made is detected, the number of printing papers printed is detected, then the average of the number of the printing papers printed per one original printing plate is calculated, and is outputted. CONSTITUTION:An area for storing the total number of printing papers printed and an area for storing the total number of original printing plates made are provided in a RAM33. A CPU32 detects the number of the printed papers and the number of the printing plates made, divides the total number of the printed papers stored in the RAM33 by the total number of the printing plates made which is also stored in the RAM33, and digitally indicates on an indicator 44 the average of the numbaer of the printing papers printed per one original printing plate.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for detecting the number of printed sheets in a plate-making printing system, and particularly to a device for detecting the number of printed sheets for a single printing plate in a plate-making printing system that performs stencil printing and offset printing. The present invention relates to a number of printed sheets detection device that detects an average value of the number of printed sheets.

Background of the Invention Stencil printing and offset printing are printing means that form a printed image with printing ink on printing paper using a printing master such as a stencil printing base paper or an offset master. The following items are required: a printing master plate, printing ink, and printing paper.

In general, the amount of printing ink required to form a printed image on a single sheet of printing paper does not differ significantly, so the ratio between the consumption of printing ink and the consumption of printing paper depends on the specific characteristics of the printing device. It is generally determined from the printing characteristics, but the ratio between the consumption of the printing original plate and the consumption of printing paper is determined by the average value of the printing original plate for one printing original plate, and this varies for each user. cannot be recognized in advance. For this reason, it is difficult to properly manage the inventory of printing master plates and printing paper.

Purpose of the Invention The present invention detects the average number of prints for one stamp-forming plate based on the history of each plate-making printing system during the process of using the plate-making printing system, and outputs the average value at any time. The user is informed of the average number of copies printed per printing plate at any given time, that is, the ratio of the printing plate consumption to the printing paper consumption, and based on this information, the printing plate and It is an object of the present invention to provide a number of printed sheets detecting device for a prepress printing system that facilitates proper inventory management of printing paper.

Structure of the Invention According to the present invention, the above-mentioned objects include a plate-making sheet number detection means for detecting the number of printing original plates made by a plate-making device, and a printing device for detecting the number of printing sheets printed by the printing device. printing on one printing original plate based on the number of plates detected by the plate number detection means, the number of plates detected by the plate number detection means, and the number of printed plates detected by the number of printed plates detection means; In a prepress printing system having a calculation means for calculating the average number of sheets, and an output means for outputting the average value of the number of sheets printed for one printing master plate calculated by the calculation means This is accomplished by a print number detection device.

Effects of the Invention According to the above-described configuration, the average value of the number of prints for one printing plate is calculated historically during the process of using the prepress printing system, and the average value is displayed on the display, printer, etc. The user can accurately recognize the average number of prints for one printing plate from the printed value printed by the printer in the display value range displayed on the display. In other words, the ratio between the amount of consumption of printing original plates and the amount of consumption of printed sheets can be accurately known at any time, thereby facilitating proper inventory management of printing original plates and printing paper.

DESCRIPTION OF EMBODIMENTS The present invention will now be described in detail with reference to embodiments with reference to the accompanying drawings.

FIGS. 1 and 2 show one embodiment of a plate-making printing apparatus in which a printed number detection and display device according to the present invention is implemented. In these figures, reference numeral 1 indicates a cabinet of a plate-making and printing apparatus, and the cabinet includes a cylindrical plate cylinder 2,
A paper feed device 6 including a paper feed tray 4, a paper feed roller 5, and a paper feed roller 26, a belt conveyor-type paper discharge device @7 and a paper discharge tray 8, and a roll 9 of stencil printing base paper S are rotatable. Supporting stencil printing base paper storage unit 10 and exposure type plate making device 11
, a base paper cutter 28 , a document placement table 12 , and a document discharge path 13 are provided.

The cylindrical plate cylinder 2 is composed of a cylindrical body having an ink-passing structure, and has a clamping device 14 for selectively locking one end of the stencil printing base paper S on its outer circumferential surface, and has a clamping device 14 for selectively locking one end of the stencil printing base paper S on its outer circumferential surface. The base paper S is wound around the base paper S and is rotated by a main electric motor 25 in the counterclockwise direction as shown in the figure around its own central axis.A squeegee roller 15 is installed inside the cylindrical plate cylinder 2. and doctor rod 16 and ink supply pipe 1
An ink supply device 18 including an ink supply device 7 is provided, and the ink supply device supplies printing ink to the inner circumferential surface of the cylindrical plate cylinder 2- in response to rotation thereof. The squeegee roller 15 is driven by a main electric motor [25
At the same time as 0 rotation, it is rotated counterclockwise in the figure.

The main motor 25 is provided in the cabinet 1, and in addition to the cylindrical plate 1] R2 and the squeegee roller 15, the main motor 25 is provided with a paper feed roller 5.
, the paper feed roller 26, and the paper discharge device 7 are driven in conjunction with each other.

The plate-making device 11 includes a light source box 21 which has a light 1'a@19 inside and a glass light transmitting plate 20 attached to the upper opening, and a light transmitting plate 20 fixedly disposed above the light source box 21. Between the opposing press plate 22 and the release position (lowered position) where the light transmitting plate 20 is separated from the press plate 22 and the pressed position @ (raised position) where the light transmitting plate 20 is pressed against the press plate 22 The light source box 21 is provided with a drive device 23 that reciprocates the light source box 21 in the vertical direction as shown in the figure.

FIG. 3 shows a control device for the prepress printing apparatus shown in FIGS. 1 and 2. FIG. This control device has a conventional microcomputer 37 including a central processing unit 32, a random access memory 33, a single memory 34 and two input/output board devices 35 and 36, connected to each other by a signal bus 31. ing. The microcomputer 37 receives an information signal regarding the presence or absence of a document from a document sensor 27 provided between the document placement table 12 and the light source box 21, and receives an information signal regarding the presence or absence of a document from a paper ejection lens 38 provided in the paper ejection device 7 when the printing paper has passed. An information signal regarding whether or not is input is input to the input/output boat device 35, and a prepress start signal is sent from the prepress start switch 40 of the operation 511139 provided on the top surface of the cabinet 1, a print start signal is sent from the print start switch 41, A print number setting signal is input from the print number setting keyboard 42, and an average print number display signal is input from the average print number display switch 43 to the input/output boat device 36. The main electric motor 11 of the printing device is operated by the input/output boat device 35 to selectively execute the printing routine, the plate making routine, and the average number of printed sheets detection and display routine according to the flowchart shown.
25, the light source device H19 of the plate-making device, and the drive device 23, and the input/output boat device 36 outputs a control signal to the display device 4.
A control signal is output to 4.

The random access memory 33 stores a memory area for storing the historical total number of sheets printed by the printing MITI, that is, the total number of sheets printed, and a memory area that stores the total number of historical sheets made for the plate making device, that is, the total number of sheets made for plate making. The central processing unit 32 has a function of detecting the number of sheets to be printed by executing a printing routine, a function of detecting the number of plates to be made by executing a prepress routine, and a memory area of the random access memory 33. It has an operation column function that divides the stored total number of printed sheets by the total number of plated sheets.

As shown in FIG. 1, the display 44 is provided on the top surface of the cabinet 1, and is configured to digitally display the set number of prints, the remaining number of prints, and the average number of prints.

Next, the operation of the plate making printing apparatus and the operation of the number of printed sheets detecting apparatus according to the present invention will be briefly described with reference to the flowcharts shown in FIGS. 4 to 7.

FIG. 4 shows the main routine.

In the first step 1 of the main routine, it is determined whether the print start switch 41 is in the on state. When the print start switch 41 is in the ON state, that is, when a print start signal is given to the input/output port device @36, the process advances to step 2;
is not on and the print start signal is input/output boat device 3.
If it is not given in step 6, proceed to step 3.

In step 2, a printing routine as shown in FIG. 5 is executed.

In step 3, it is determined whether or not the prepress start switch 40 is in the on state. Plate making start switch 40
is in the on state, that is, when the prepress start signal is given to the input/output boat device 36, the process proceeds to step 4. On the other hand, when the prepress start switch 40 is not in the on state, that is, the input/output boat device 36 is given the prepress start signal. If no signal is given, proceed to step 5.

In step 4, a plate making routine as shown in FIG. 6 is executed.

In step 5, it is determined whether the average number of printed sheets display switch 43 is in the on state.

When the average number of printed sheets display switch 43 is in the ON state, that is, when the average printed number display signal is given to the input/output boat device 36, the process proceeds to step 6, whereas when the average number of printed sheets display switch 43 is not in the ON state. That is, it is reset when the average/printed number display signal is not applied to the input/output boat device 36.

In step 6, a routine for detecting and displaying the average number of printed sheets as shown in FIG. 7 is executed.

Next, the printing routine shown in FIG. 5 will be explained.

In the first step 11 of this printing routine, the set value PS of the number of print copies set by the print number setting keyboard 41 is read.

After step 11, the process proceeds to step 12.

In step 12, it is determined whether or not the set value Ps for the number of prints is not O. When the set value ps=0, the process proceeds to step 17, whereas when the set value Ps=0, the process proceeds to step 13.

In step 13, it is determined whether flag F is 1 or not. When the flag F=1, the process proceeds to step 15, whereas when the flag F=1, the process proceeds to step 14.

In step 14, the input/output boat device 35 outputs an operation start signal for rotating the main motor 25. As a result, the main motor 25 starts rotating. Also, in step 14, flag F is converted to 1.

When the main electric motor 25 rotates, the cylindrical plate cylinder 2 is rotationally driven in the counterclockwise direction G1 as seen in FIG. Each operates, and one sheet of printing paper P is transferred from the paper feed table 4 to the paper feed unit @ 6 and the paper feed roller 26 between the cylindrical plate cylinder 2 and the press roller 3 for each rotation of the cylindrical plate cylinder 2. sent. This printing paper P is sandwiched between the cylindrical plate cylinder 2 and the press roller 3, and is attached to the outer peripheral surface of the cylindrical plate cylinder 2 as it rotates in the counterclockwise direction as shown in the figure. As shown in the figure, printing ink is applied to the upper surface of the stencil printing base paper S from the perforated image area of the stencil printing base paper S, a printing image is formed with the printing ink on the upper surface, and then the cylindrical plate A paper discharge tray 8 is placed by a paper discharge device 7 away from the cylinder 2.
Paper is ejected upward.

After step 14, the process proceeds to step 15, in which it is determined whether or not the paper ejection sensor 38 outputs a signal indicating that it has detected the passage of the printing paper P. When the paper ejection sensor 38 outputs a printing paper passing signal, the process proceeds to step 16. On the other hand, when the paper ejection sensor 38 does not output a printing paper passage signal within a predetermined period of time, it is assumed that a trouble has occurred and the process proceeds to step 17. . In this step, it is confirmed that one sheet of printing paper has been printed and ejected.

In step 16, the total count value Pt of the number of printed sheets is counted up by one, and the set value Ps of the number of printed sheets is counted down by one. The total count value Pt of the number of printed sheets is an integrated value of the number of printed sheets in one plate-making printing apparatus, that is, the total number of printed sheets, and is stored in a total number of printed sheet memory area provided in the random access memory 33. After step 16, the process proceeds to step 12.

In step 17, the rotation of the main motor 25 is stopped, and the flag F is changed to zero. Note that after step 17, the process returns to the main routine and proceeds to step 3 of the main routine.

Next, the plate making routine shown in FIG. 6 will be explained.

In the first step 21 of this plate-making routine, it is determined whether or not the setting of the original to be printed on the original mounting table 12 is completed based on the output signal of the original sensor 27, and whether the value is 1=. If the original setting has been completed, proceed to step 22,
On the other hand, if the document setting is not completed, the plate making routine is ended and the process proceeds to step 5 of the main routine.

In step 22, the driving device 23 is driven and the light source device 19 is energized. As a result, one divisional plate making process is performed. If a detailed explanation of this divisional plate making is required, please refer to Japanese Patent Application No. 57-207216.

Step 220 Next, proceed to step 23, step 23
In this case, the stencil printing paper S is fed by a length corresponding to - times of divided production. Incidentally, at this time, since the leading end of the stencil printing paper S is already secured to the cylindrical plate cylinder 2 by the clamping means 14, the feeding of the stencil printing stencil S is carried out by dividing the rotation of the cylindrical printing cylinder 1. . After step 23, the process advances to step 24.

In step 24, it is determined based on the output signal of the document sensor 27 whether or not the plate making of one sheet of document is completed. When the plate-making of one sheet of original is completed, the process proceeds to step 25, whereas when the plate-making of one sheet of document is not completed, the process proceeds to step 22, where the divisional plate-making is repeated.

In step 25, the total counter value St for the number of plates to be made is incremented by one. The count value 3t of the total number of plates to be made is the cumulative total number of plates to be made, and this total count value is stored in the total number of plates to be made storage area of the random access memory 33. Step 2
After step 5, the process returns to the main routine and proceeds to step 5 of the main routine. Incidentally, when the plate making of one sheet of original is completed, the base paper cutter is operated and printing on the base paper S for stencil printing is performed.

Next, the average number of printed sheets detection and display routine shown in FIG. 7 will be explained.

In the first step 31 of this routine, the total number of printed sheets counter (IflPt and the counter value 3t of the total number of plates made) stored in the random access memory 33 are read. After step 31, proceed to step 32. move on.

In step 32, an operation is performed to divide the counter value St of the total number of printed sheets by the counter value St of the total number of plate-made sheets, and the average value Pa of the number of printed sheets for one sheet of stencil printing paper is calculated. After step 32, the process advances to step 33.

In step 33, the average number of printed sheets display switch 43
A determination is made as to whether or not it is in the on state. When the average number of printed sheets display switch 43 is in the on state, step 3 is performed.
On the other hand, if the average number of printed sheets display switch is not on, the process advances to step 35.

In step 34, the average number of sheets printed on one sheet of stencil printing paper calculated in step 32 is calculated as 1aP.
A is digitally displayed on the display 44.

In step 35, the display 44 finishes digitally displaying the average number of prints Pa for one sheet of stencil printing paper. After step 35, the process returns to the main routine and proceeds to step 1 of the main routine.

As described above, according to the number of printed sheets detecting device according to the present invention, the plate-making printing device stores the number of plates made and the number of printed sheets, and when the switch is operated, the total number of plate-made sheets and the total number of printed sheets are matched. The average value of the number of sheets printed on a printing master plate such as a stencil printing base paper is automatically calculated, and this average value is output.This allows the user to print one sheet at any time by operating a single switch. The average value of the number of prints for a printing plate can be determined accurately and quickly, and this information facilitates appropriate inventory management of printing paper and printing plates.

The average value may be output to a printer other than the display so that the average value is printed and recorded, or the average value may be output to a computer. The average value may be centrally managed by a computer.

The number of printed sheets detecting device according to the present invention can also be implemented in a prepress printing system in which the plate making device and the printing device are separate units, and in this case, the plate making device and the printing device are electrically connected. They only need to be connected to each other by a control circuit.

Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited thereto.
It will be apparent to those skilled in the art that various embodiments are possible within the scope of the invention.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing one embodiment of a plate-making printing apparatus incorporating the number of printed sheets detection @ position according to the present invention, and FIG. 2 is a schematic configuration diagram of the plate-making printing apparatus shown in FIG. FIG. 3 is a block diagram showing one embodiment of the control device for the plate-making printing IA@ and the number of printed sheets detecting device, and FIG. 4 is a flowchart showing the main routine of the plate-making printing device incorporating the number of printed sheets detecting device according to the present invention. , FIG. 5 shows E1 according to the present invention.
1#1 A flowchart showing the printing routine of a prepress printing apparatus incorporating the number of printed sheets detection device, FIG. 1 is a 0-chart showing a routine for detecting and displaying the average number of printed sheets of a prepress printing apparatus equipped with a number of printed sheet detecting device according to the present invention. 1... Cabinet, 2... Cylindrical plate cylinder, 3...
Press roller, 4... Paper feed stand, 5... Paper feed roller,
6... Paper feed device, 7... Paper discharge device, 8... Paper discharge table, 9... Roll of stencil printing paper, 10-- stencil printing paper storage section. 11... Plate making device, 12... Document mounting table, 13...
・Document discharge passage, 14...clamp device, 15...
Squeegee roller, 16... Doctor Rod, 17...
・Ink supply pipe, 18... Ink supply device, 19
...Light source device, 20...Light transmission plate, 21...Light source box, 22...Press plate, 23...Drive device, 2
5... Main motor, 26... Paper feed roller, 27...
- Original sensor, 28... Original paper cutter, 31... Signal bus, 32... Central processing unit, 33... Random access memory, 34... Read only memory, 3
5.36... Input/output boat device, 37... Microcomputer, 38... Paper discharge sensor, 39... Operation panel, 40... Prepress start switch. 41... Print start switch, 42... Keyboard for setting the number of print sheets, 43... Average print number display switch. 44... Display Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] a plate-making number detection means for detecting the number of original printing plates made by the plate-making device; a printed number-detecting means for detecting the number of prints printed by the printing device; a calculation means for determining the average number of prints for one printing original plate from the number of prints detected by the number detection means; and an average value of the number of prints for one printing original plate excluded by the calculation means A number of printed sheets detecting device in a prepress printing system having an output means for outputting.