JPH05330710A - Tension control device for rotary press - Google Patents

Abstract

PURPOSE:To control the tension value of each piece of sample paper to an optimum value by using surface layout information to perform predetermined processing to calculate and set the tension value of each piece of sample paper, and calculating the pressure values of a Wallis in a drag roller as well as a nipping roller located up a former. CONSTITUTION:A tension detector TP1 for detecting the tension of sample paper as a voltage is provided up a drag roller 1 on a former for each piece of sample paper fed to input respective tension detection signals to a tension operation part 5 after amplification and A/D conversion. A tension control roller 4 is provided up the tension detector TP1 and its roller shaft is directly coupled to a tension control motor. The tension operation part 5 performs predetermined processing using surface layout information input from an operation part 6 to calculate the tension value of each piece of sample paper and the pressure values of a Wallis roller 2 and a nipping roller 3, thereby variably controlling the tension control motor TM1 via an inverter part IV1 and driving and controlling a cylinder WS1 for the Wallis and a nipping motor NM1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension control device for a rotary press, and more particularly to a device for controlling the tension of a plurality of paper stocks running on a rotary press composed of a plurality of printing machines.

[0002]

2. Description of the Related Art In a rotary printing press that uses a roll of paper as a raw material for printing and folding in a consistent manner, the tension control is used to control the running tension of the raw material upstream of a triangular plate (former) for vertically folding the raw material. It is done automatically by the device.

In a conventional rotary press composed of a plurality of printing machines and the like, a tension detector for detecting the tension is provided at a position where each material passes, as a controller for controlling the tension of the material upstream of the former. There is a method of controlling the tension of the paper by controlling the pressure value of the wallis of the drag roller on the former and the pressure value between the nipping rollers located downstream of the drag roller based on the total tension value of the former (hereinafter, Called the first method).

As another method, a tension detector and a variable speed drive roller are provided at the position where each material passes, and the tension of each material is detected by detecting the fluctuation of tension and giving a variable speed drive signal to the variable speed drive roller. There is a method of controlling (hereinafter, referred to as a second method).

A conventional tension control device for a stock paper in a rotary printing press is disclosed in, for example, Japanese Patent Application Laid-Open No. 52-136010 and Japanese Patent Publication No. 60-38309.

[0006]

The first method described above is
This is a method in which a plurality of overlapping paper materials are pressed between a drag roller and a wallet, and between two nipping rollers, so that the contact frictional force pulls in the paper materials.
Therefore, it is useful for stabilizing the total tension value of all papers.

However, in this method, since the contact frictional force applied to each of a plurality of overlapped paper stocks is not constant, the pulling force received by each paper stock is different, and in addition, each paper stock is sent out from the printing machine of each paper stock and the former is used. Since the length of the path to the top is different, it is affected by the inertia of the guide roller and the elongation of the paper, and there are also the paper that passes through the turn bar and the bay window that generate contact friction resistance, so the tension values are not constant. That is, the tension is low for a certain paper and high for a certain paper, and the individual papers are not stable.
From the above, there has been a problem that a horizontal deviation of a specific raw paper and a variation in cutoff of the raw paper cannot be eliminated.

In the above-mentioned second method, an independent tension control device for each material detects tension fluctuations and controls the tensions independently, and the wallis and nipping roller at the downstream portion thereof. This is a control method that is independent of. Therefore, even if the tension is controlled upstream of the variable speed drive roller, the downstream portion is not controlled, which makes the roller unstable.
There was a problem that the lateral deviation of the paper stock and the variation of the cut-out paper could not be eliminated.

Further, in both the first and second systems, the tension set values to be given to the respective tension control devices must be artificially set for each different paper width and paper position.
Further, if this setting is not optimal, there is a problem that the paper breakage, the horizontal misalignment of the paper stock, and the variation in cutoff occur, which is very troublesome.

By the way, the tension that greatly affects the cut-off of the paper stock is the total tension determined by the contact frictional force due to the pressure of the wallis and the pressure of the nipping roller. According to the study by the present inventor, first, by stabilizing the total tension and then by stably controlling the tension of the individual stocks, it is possible to stably control the cut-off of the individual stocks.

However, the tensions of the individual papers and the total tensions of the wallet and nipping roller are in a relationship of influencing each other.
For this reason, if the pressure value of the wallis and the pressure value of the nipping roller are too low, the tension cannot be increased unless the individual variable speed drive rollers of the second method are made into a device that generates a stronger tension, which increases the cost. I knew I would be invited. Further, if the pressure value of the wallis and the pressure value of the nipping roller are too high, the total tension becomes high. However, it has been found that the individual variable speed drive rollers of the second method cannot drop the one having high total tension.

From the above, it can be said that the purpose is not achieved by controlling the tension control of each material and the total tension control by independent control devices, and it is necessary to have a tension control device in which both are integrated. Further, even if the first method and the second method are simply used together, the troublesome operation for setting the optimum tension cannot be eliminated, and it can be said that the optimum control is difficult.

An object of the present invention is to provide a tension control device in a rotary press capable of stably controlling the tension value of each of a plurality of paper stocks at an appropriate value.

[0014]

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems and achieve the object by the constitutions described in the claims.

[0015]

In the tension control device according to the present invention, the tension calculation control unit performs a predetermined process using the surface allocation information,
The tension value for each material to be obtained by each tension control roller is calculated and set, and the pressure value of the wallis of the drag roller on the former and the pressure value of the nipping roller provided downstream of the former are calculated.

Here, the face layout information is information that is indispensable for the print preparation work and has been used conventionally. Information for allocating and mounting a plurality of printing plates on each printing machine is provided. Contains.

[0017]

1 is a block diagram of a tension control device of the present invention. Actually, a tension control roller is provided for each of a plurality of material sheets to control the tension of each material sheet. However, for ease of explanation, a representative block diagram for tension control of one material sheet is shown. There is. 2 and 3 are block diagrams of the control circuit. FIG. 4 is a block diagram for explaining a wallis and nipping roller control portion. Hereinafter, the tension control device of the present invention will be described with reference to FIG. 1 while appropriately referring to FIGS. 2 to 4.

In FIG. 1, a tension detector TP1 for detecting the paper tension as a voltage is provided upstream of the drag roller 1 on the former. The tension voltage detected here is
The signal is amplified by the tension detection amplifier A1, and the A / D conversion unit A /
It is converted into a digital value P _TP by D and taken into the tension calculation control unit 5.

As shown in FIG. 2, a plurality of tension detectors TP1 to TP16 (here, 16) are provided in order to detect the tension of each of a plurality of running stocks. Corresponding to this, the tension detection amplifiers are also A1 to A16.
Is provided in plural. The digital output of the A / D conversion unit A / D is input to the input port DI1 and further input to the central processing unit (CPU) 7 via the data bus 8. The central processing unit 7 has a main storage device (not shown), a tension calculation control program and surface allocation information existing in the main storage device. As shown in FIG. 2, the tension calculation control unit 5
Is the central processing unit 7, the input port DI1, the output port D
It is composed of O1 and a data bus 8.

The tension calculation control section 5 obtains the tension value of each material by a predetermined process using the surface allocation information and outputs it as a digital value T. The face allocation information will be described later. The digital output T is converted into a voltage signal by the D / A conversion unit D / A and input to the frequency setting input terminal R of the inverter unit IV1. The frequency-converted three-phase AC voltage is supplied to the tension control motor TM1 from the output terminal OUT of the inverter unit IV1. As a result, the peripheral speed of the tension control roller 4 interlocking with the motor TM1 is variably rotated.

Further, the voltage generated by the tachogenerator PG rotating in synchronization with the printing cylinder of the rotary press is the inverter IV1.
Input to the control terminal of. Normally, since the input of the voltage generated by the tacho generator PG and the frequency of the three-phase AC voltage to the tension control motor TM1 are set in synchronization with each other,
The tension control roller 4 is rotating at a peripheral speed synchronized with the stock paper traveling speed.

However, the frequency of the three-phase AC voltage can be proportionally varied by variably inputting the voltage signal from the D / A converter D / A to the input terminal R of the inverter IV1. That is, the peripheral speed of the tension control roller 4 can be changed from the running speed of the paper stock to the speed increase or the speed decrease. As a result, the tension of the running material can be changed by the contact frictional force between the tension control roller 4 and the material.

The digital value T is input to the output port DO1 via the data bus 8 as shown in FIG.
It is input to the / A conversion unit D / A. The tension control motor is provided with a plurality (16 here) of TM1 to TM16 in order to control (variable) the tension of each of a plurality of running papers.
It is provided. Corresponding to this, a plurality of inverter units IV1 to IV16 are also provided, and a plurality of tension control rollers 4 are also provided.

The tension control roller 4 is provided downstream of the guide rollers GR1 to GR6 (these will be described later) and upstream of the tension detectors TP1 to TP16. The control result of the peripheral speed of the tension control roller 4 is detected by the tension detectors TP1 to TP16.

The tension calculation control section 5 carries out a predetermined process using the surface allocation information, and the pressing value Pw of the wallis (wallis roller) 2 of the drag roller 1 on the former and the nipping roller 3 provided downstream of the former. Pressing value P of
Calculate n and.

The digital value of the pressure value Pw of the wallis 2 calculated by the tension calculation control part 5 is sent to the wallis control part CN2 where the power is converted and is sent to the cylinder drive part WD1 and the wallis is supplied in accordance with the power. Fluid pressure cylinder WS1
Is activated and the Wallis 2 is pressed to set the pressing value Pw. That is, the wallis control unit CN2 determines the pressure value P of the wallis 2.
The w is initialized by a signal from the tension calculation control unit 5.

Further, the digital value of the pressing value Pn of the nipping roller 3 calculated by the tension calculation control section 5 is sent to the nipping control section CN3 where it is converted into electric power and sent to the nipping drive section ND1 to have its electric power. Accordingly, the nipping motor NM1 is driven. This nipping motor NM1
When the pulse generated by the nipping encoder PT1 interlocked with is input to the nipping control unit CN3, the nipping control unit CN3 controls the gap amount of the nipping roller 3 by counting the input pulses. The pressing value Pn is set. That is, the nipping control unit CN3 initializes the pressing value Pn of the nipping roller 3 by a signal from the tension calculation control unit 5.

As shown in FIG. 3, the digital value of the pressing value Pw is input to the output port DO2 via the data bus 8 and further to the Wallis controller CN2. The Wallis fluid pressure cylinder is provided with a plurality of WS1 to WS8 (here, eight) so as to be able to press the paper sheets of various widths and positions. Correspondingly, a plurality of cylinder drive units WD1 to WD8 are also provided.

The digital value of the pressing value Pn is input to the output port DO3 via the data bus 8 and further to the nipping controller CN3. The nipping motors NM1, NM2, ... Are provided corresponding to the nipping roller 3, and further nipping motors NM1, NM
2, nipping drive units ND1 and ND
2, ... are provided. Nipping motor NM1, N
Corresponding to M2, ... Nipping encoder PT1,
.. are provided, and the output thereof is input to the nipping control unit CN3.

Fluid pressure cylinder WS for wallis shown in FIG.
FIG. 4 shows a specific configuration of 1 to WS8 and the like.
Upstream of formers F1 and F2, Wallis 2
Eight pieces are provided at the positions shown in the drawing so as to face the drag rollers 1 on the former. Fluid pressure cylinders WS1 to WS8 for Wallis are provided corresponding to each of the Wallis 2. Downstream of the formers F1 and F2, two nipping rollers 3 are provided for each of the formers F1 and F2. Nipping motors NM1 to NM4 and nipping encoders PT1 to PT4 are provided corresponding to each of the nipping rollers 3.

Next, the surface allocation information will be described. Hereinafter, when the stock passes only one of the two formers F1 and F2 shown in FIG. 4 (F1 former single ejection), and when the stock passes the two formers F1 and F2 (F1, F2). It will be explained separately for the case of both formers.

First, the case of single-sided F1 former will be described with reference to FIGS. FIG. 5 shows an example of a rotary press composed of a plurality of printing machines in the case of single-sided F1 former. FIG. 6 shows (plate) plane layout information in the configuration of FIG. FIG. 7 is an explanatory diagram of a paper sheet that passes over the former F1. FIG. 8 is an explanatory diagram of the width of the raw material paper when the printing plates in the regions of the respective raw paper sheets W1 to W6 pass the guide rollers GR1 to GR6.

In FIG. 5, each printing machine P1, P2, P3
On the upper part of the plate cylinder (printing cylinder) 11 of FIG. The one-sided tumbler 14 is for arranging the GS and GC side stock sheets to the OC and OS sides. Where G
The positional relationship between S, GC and OC, OS and the formers F1 and F2 is as shown in FIGS. A slitter 12 that separates the center of the paper stock, that is, the center (boundary) of GC and OC is provided upstream of the one-sided tumbler 14. In the printing machine P1, one side (OC, OS side) of the paper separated by the slitter 12 is a guide roller GR.
It is sent via 5 to the former F1. This is referred to as a paper W5. The other (GS, GC side) of the separated paper is moved to the OC and OS sides by the one-sided tumbler 14 and is sent to the former F1 through the guide roller GR6. This is designated as paper W6.

Similarly, the paper stock of the printing machine P2 passes through guide rollers GR3 and GR4, and the paper stock W3 and W4 respectively.
Becomes The stock of the printing machine P3 is cut by the slitter 12 after entering the multicolor printing machine M, and is guided by the guide roller GR.
After 1 and GR2, the raw papers W1 and W2 are formed. Therefore, in the example of FIG. 5, the paths of the material sheets W1 to W6 of the printing machines P1, P2, and P3 are paths that pass through the guide rollers GR1 to GR6.

As a result of being cut and offset as described above, the paper sheets W1 to W6 pass on the former F1 in the state shown in FIG. That is, the raw paper passes only on the former F1, and is stacked and folded in the order of W1 to W6 from the top. Therefore, at this time, 24 plate surfaces # 1 to # 24 must be printed on the front and back sides and the left and right sides of the six sheet materials W1 to W6 as shown in FIG.

In order to perform such printing in the configuration of FIG. 5, the (plate) surface layout information shown in FIG. 6 is prepared. This face layout information is always used for print preparation work, and indicates which printing press and which position to attach each printing plate. The (version) plane layout information is created and input by the operator from the operation unit 6 and stored in the main memory of the central processing unit (CPU) 7. Alternatively, this (version) surface allocation information can be created in a host computer (not shown) and input to the tension calculation control unit via a communication line or the like. In addition, in FIG. 6, a slitter 13 provided for separating the center of the paper stock is also shown above the formers F1 and F2, but this slitter 13 is not used in the case of single-sided F1 former.

For example, regarding the surface layout information for the printing machine P1, on one side of the material paper (rolling paper) having a width from GS to OS, # 14, # 11, # 1 from the GS side.
Print the 6th and 9th printing plates, and from the GS side to the # 1 on the other surface.
It is shown that the printing plates 3, 3, 12, and 10 are printed.

Since the surface allocation information of FIG. 6 is applied to the structure of FIG. 5, each roll paper (before being cut by the slitter 12) is shown in FIG. 8 (after separation).
I want to be 6. From this, if the width of the roll paper is known, the width of the raw paper W1 to W6 can be obtained. The width of the paper roll is determined by which of GS and OS the printing plate instruction is set in the page layout information.

Next, the case where both the F1 and F2 formers are output will be described with reference to FIGS. Figure 9 is F
1 shows an example of a rotary press composed of a plurality of printing presses in the case of both F1 and F2 former output. FIG. 10 shows (plate) surface layout information in the configuration of FIG. FIG. 11 shows the former F1,
FIG. 9 is an explanatory diagram of a material sheet that passes over F2. In FIG. 12, each plate surface in the area of each paper W1, W3, W5 is a guide roller GR.
It is explanatory drawing of the paper width at the time of passing 1, GR3, and GR5.

In FIG. 9, each printing machine P1, P2, P3
The slitter 12 and the one-sided tumbler 14 are not used, and instead of these, the slitter 13 above the formers F1 and F2 is used. As described above, the slitter 13 separates the centers of the paper stocks, that is, the centers of GC and OC.

Therefore, the paper stocks W5, W of the printing machines P1, P2 are
3 is a guide roller GR5, GR3 without being separated
Pass through. The paper W1 of the printing machine P3 passes through the guide roller GR1 after entering the multicolor printing machine M without being cut off. Each of the papers W1, W3 and W5 is a guide roller G.
After passing through R1, GR3 and GR5, the slitter 13 separates the formers F1 and F2.

As a result of the above, the material sheets W1, W3, W5 pass on the formers F1, F2 in the state shown in FIG.
At this time, twelve printing plates # 1 to # 12 must be printed in two sets as shown in FIG. 11 on the three sheets W1, W3 and W5. For this purpose, the (print) surface layout information shown in FIG. 10 is prepared.

For example, regarding the page layout information for the printing machine P3, the same plate (same page) exists in GS and OC, and in GC and OS, respectively. From this, F1,
You can see that it is an F2 former. On the contrary, if the same printing plate is not included in the face layout information, it is understood that the F1 former is single-sided.

Further, according to the plane layout information of FIG. 10, the printing machine P is used.
Since the plate surface data of 1, P2, and P3 are all set, all the paper widths are the same, but if the plate surface data of the printing machine P1 is not set in GS and OS but only in GC and OC, The width of the paper roll W5 of the printing machine P1 is
One of the widths of the paper rolls W3, W1 of the printing machines P2, P3
It turns out that it is / 2.

Next, the processing performed by the tension calculation control section 5 using the surface allocation information will be described. The tension calculation control unit 5
First, the width of the raw paper W1 to W6 is obtained. For this purpose, the width of the paper roll of each printing machine P1, P2, P3 is obtained.
The width of the paper roll is obtained from the face allocation information as described above. Next, as shown in FIG. 8 or 12, the relationship between the roll paper and the raw paper is obtained from the face allocation information, and the paper width when the paper passes through the guide rollers GR1 to GR6 is obtained by comparing this with the face allocation information.

Here, the paper roll or the paper W1 to W6 is G
If present in everything from S to OS, this paper is roll A. When the width is 3/4, 1/2, and 1/4 of A roll, these papers are C roll, D roll, and F roll, respectively. Therefore, the paper materials W1 to W6 in FIGS. 5 to 8 can be represented as D rolls. The material papers W1 and W3 in FIGS. 9 to 12 can be represented as A roll, and W5 can be represented as D roll. In addition, A
The names of rolls, C rolls, D rolls, etc. are based on the regulations of JISP3001 (newspaper roll). The F roll is a tentative name for a roll paper having a width of 1/4 of the A roll.

In addition, the tension calculation control unit 5 calculates
A standard tension value for each material to be obtained by the tension control roller 4 is calculated and set. As described above, each of the paper W1 to W
Since it can be determined which of A roll, C roll, and D roll, the standard tension value for each material to be obtained by each tension control roller 4 can be calculated. That is, if the standard tension value of the A roll material is, for example, To, the standard tension value of the C roll material is 3/4 × To, and the standard tension value of the D roll material is 1.
/ 2 x To. The value To can be obtained empirically.

The tension calculation control section 5 sends the calculated standard tension value of each material to the D / A conversion section D / A, where the digital value is converted into a voltage value and the inverter sections IV1 to IV16 are converted.
Is input to the input terminal R of No. 2 and the desired standard tension value is set in the inverter units IV1 to IV16 for each material. The peripheral speed of each tension control roller 4 is initialized by the standard tension values set in the inverter units IV1 to IV16.

Further, the tension calculation control unit 5 calculates
The number n of sheets to be passed through the former F1 (or F1 and F2) is calculated. The number n of the raw paper sheets is calculated as 1 if the passing raw paper sheet is D roll and 1/2 if it is F roll.

Then, the tension calculation control section 5 determines the number of sheets n
The product n × d of the material thickness d is calculated as the total material thickness. The paper thickness d is given from the operation unit 6. This product n × d is used to calculate the pressure value of Wallis 2. That is, when the coefficient of the pressure value of Wallis 2 is y1 and the offset value of the pressure value is p, the pressure value Pw of Wallis 2 can be calculated as n × d × y1 + p. Similarly, the coefficient of the pressing value Pn of the nipping roller 3 is z1, and the offset value of the pressing value is m.
Then, the pressing value Pn of the nipping roller 3 is n × d
It can be calculated as xz1 + m.

The pressure value Pw of the wallis 2 is used by the wallis controller CN2 for initial setting of the wallis 2 as described above. In addition, the pressing value Pn of the nipping roller 3
Is used by the nipping controller CN3 for initial setting of the nipping roller 3.

FIG. 13 and FIG. 14 show a processing flow of tension calculation control performed by the tension calculation control unit 5, which constitutes a single processing flow. In FIG. 13, it is determined whether the same page is included in the page layout information (step 1). If there is the same page, it means that both of the F1 and F2 formers are output, and step 9 and subsequent steps in FIG. If there is no same page, it is the case of single-sided F1 former, and the next step 2
Do the following:

In the case of the F1 former single-sided printing (in the case of FIGS. 5 to 8), referring to the surface layout information (FIG. 6) for each printing machine P1, P2, P3, the printing machine P1, P2, P3 It is determined whether the roll paper to be used is A roll, C roll, D roll, or the like (step 2).

Next, based on the obtained width of the paper roll, as shown in FIG.
The data shown in (1) is created, and by comparing this with the surface allocation information, the papers W1 to W6 after being separated by the slitter 12
The paper width of the paper is determined (step 3).

Further, each guide roller GR1 to GR6
(I.e., the width of the stock that passes through the corresponding downstream tension control roller 4) is determined (step 4). In the case of the F1 former single-sided printing, since the raw papers W1 to W6 correspond to the respective guide rollers GR1 to GR6, the raw paper width of the raw papers passing through the guide rollers GR1 to GR6 can be obtained from this point.

Next, the standard tension value for each material to be obtained by the tension control roller 4 is calculated by the above-mentioned calculation using the material width of the material that passes through the guide rollers GR1 to GR6 obtained in step 4 ( Step 5).

Further, using the paper width of the paper sheet that passes through each of the guide rollers GR1 to GR6 obtained in step 4,
The number n of papers W1 to W6 that pass over the former F1
Is calculated (step 6).

After this, the pressing value Pw of the wallis 2 is calculated by the above-mentioned calculation using the number n of sheets of material obtained in step 6 and the thickness d of the material input from the operating section 6 (step 7), and nipping is performed. The pressing value Pn of the roller 3 is calculated (step 8), and the process ends.

On the other hand, in step 1 in the case where both the F1 and F2 formers are output (in the case of FIGS. 9 to 12), FIG.
After executing Steps 9 to 15 of No., the processing is ended. Each of step 9 to step 15 corresponds to each of step 2 to step 8 of FIG. 13, and the processing is also the same, so the description thereof will be omitted.

In this case, as described above, the slitter 12 is not used. Therefore, as shown in FIG. 12, the papers W1, W3, and W5 are to be processed. Paper W
After passing through the tension control roller 4, 1, W3 and W5 are separated by a slitter 13 provided above (immediately before) the formers F1 and F2. The separated paper passes through the wallis 2 and the nipping roller 3.

Thereafter, the tension calculation control section 5 uses the values obtained by the above processing as the tension control roller 4, the wallet 2,
For initial setting of the nipping roller 3, the D / A converter D / A, the wallis controller CN2, the nipping controller CN
Send to 3.

[0062]

As described above, according to the present invention,
By a predetermined process using the surface allocation information, the pressure value of Wallis and the pressure value of the nipping roller can be set automatically, and
The standard tension value of each paper stock can also be initialized. Therefore, unlike the conventional case, it is not necessary to manually input and set the tension value of the paper stock for each paper stock path pattern, which eliminates the troublesomeness and saves labor.

Further, the first and second conventional methods are methods in which the tension is controlled after detecting the tension of the paper being printed, but the tension instability at the start of operation is long. In the invention, since initial setting can be performed, stable total tension can be obtained from the start of operation. Therefore, the loss of paper due to the unstable tension at the start of the printing operation is reduced.

Further, the total tension that greatly affects the cut-off of the raw paper is the total tension determined by the contact frictional force due to the pressure value of the wallis and the pressure value of the nipping roller. I have a relationship with each other. Therefore, in the present invention, since the total tension and the tension of the individual paper stocks are stably controlled, the cutting off of the individual paper stocks is more responsive and stable than the conventional apparatus. Therefore, unlike the conventional method, it does not take time to vary the cut-off of each individual paper and the stable control, and it is possible to perform the stable control quickly, reduce the cut-off misalignment at the time of acceleration / deceleration, reduce the waste paper, and reduce the printing time. It shortens and reduces the work of the operator.

Further, since the paper width of each paper passing through each tension detector and the number of paper passing through the drag roller on the former are calculated from the surface allocation information, a detector or the like is newly added to obtain them. Therefore, the tension control device can be simplified.

That is, according to the present invention, in the tension control device for the rotary press, the tension calculation control section controls the pressure values of the wallis and nipping roller and the peripheral speed of the tension control roller, so that the tension of a plurality of materials is tensioned. Since the value can be controlled stably and to an appropriate value, it is possible to eliminate the variation in cutoff of each of multiple sheets of paper, and to shorten the time until stable control. This can contribute to shortening the time and reducing the burden on the operator.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of a control circuit.

FIG. 3 is a block diagram of a control circuit.

FIG. 4 is an explanatory diagram of a wallet and a nipping roller.

FIG. 5 is a configuration diagram in the case of single-sided former.

FIG. 6 is an explanatory diagram of surface allocation information.

FIG. 7 is an explanatory diagram of passing on a former.

FIG. 8 is an explanatory diagram of passage of a guide roller.

FIG. 9 is a configuration diagram in the case where both formers are output.

FIG. 10 is an explanatory diagram of surface allocation information.

FIG. 11 is an explanatory diagram of passing on a former.

FIG. 12 is an explanatory diagram of passage of guide rollers.

FIG. 13 is a tension calculation control processing flow.

FIG. 14 is a tension calculation control processing flow.

[Explanation of symbols]

 1 Drag roller on the former 2 Wallis 3 Nipping roller 4 Tension control roller 5 Tension calculation control unit 6 Operation unit 7 Central processing unit 8 Data bus 11 Plate cylinder 12 Slitter 13 Slitter 14 Offset tab

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[Procedure amendment]

[Submission date] February 4, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

[Correction content]

[Figure 10]

Claims (4)

[Claims] 1. A wallet (2) of a drag roller (1) on a former provided on a former, a nipping roller (3) provided downstream of the former, and a drag roller (1) on the former. A tension detector provided upstream to detect tensions of the paper stock, and a tension control roller (4) provided upstream of the tension detector to control tensions of the paper stocks running
Then, a predetermined process using the surface allocation information is performed to calculate and set the tension value for each material to be obtained by the tension control roller (4), and the pressing value of the wallis (2) and the nipping roller ( 3) A tension calculation control unit (5) for calculating the pressure value, and a wallis for setting the Wallis (2) to the pressure value of the Wallis (2) according to a signal from the tension calculation control unit (5). A nipping controller (CN) for setting the nipping roller (3) so that the pressure value of the nipping roller (3) is reached by a signal from the controller (CN2) and the tension calculation controller (5).
3) A tension control device in a rotary press, comprising: 2. The tension calculation control section (5) calculates a material width of each of the plurality of material papers passing through the tension control roller (4) from the surface allocation information, and uses the calculated material paper width. The tension control device for a rotary press according to claim 1, wherein a tension value for each material to be obtained by the roller (4) is calculated. 3. The tension calculation control unit (5) calculates the paper width of each of the plurality of raw papers passing through the tension control roller (4) from the surface allocation information, and uses the raw paper width to calculate the raw paper width. It is characterized in that the number of sheets of material passing through the former drag roller (1) is obtained, and the pressure value of the wallis (2) and the pressure value of the nipping roller (3) are calculated using the number of material sheets. The tension control device in the rotary press according to claim 1 or 2. 4. The wheel according to claim 1, wherein the tension calculation control unit (5) determines whether the plurality of material sheets are former single-sided output or former double-sided output based on the surface allocation information. Tension control device for turning machine.