JP6233176B2 - Winding system, prediction method, secondary volume manufacturing method and program - Google Patents

Description

  The present invention relates to a winding system, a prediction method, a secondary volume manufacturing method, and a program.

A general production line for paper includes a wire device, a press device, a pre-dryer device, a size press device, an after-dryer device, a calendar device, a winding device, and a winder device (for example, Non-Patent Document 1).
A paper layer is formed with a wire device, the paper layer is squeezed with a subsequent press device, the obtained wet paper is dried with a predryer device, and the paper is subjected to surface treatment with a subsequent size press device. After the paper wetted by the surface treatment is dried again by an after dryer, the paper is smoothed and glossed by a calendar device, and the paper is wound by a subsequent winding device. Thereafter, the paper is rewound by a winder device, cut to a predetermined width, and wound to a predetermined length. Thereby, the winding thing (secondary volume) narrower and smaller diameter than the winding thing (primary volume) obtained with the winding device is obtained. The secondary volume is shipped as a product volume to a printing factory or the like and set in a printing machine.

Examples of the basic quality of paper include various items such as US tsubo (mass per unit area), paper thickness, whiteness, and opacity. Among these, the paper thickness is obtained by a method of measuring with a measuring device installed on-line in a paper production line or a method of collecting measurement sample paper and measuring by an operator. Of these, an efficient method is, of course, a method of measuring with an on-line measuring device.
The most widely used instrument for measuring paper thickness installed online is the caliper meter. The caliper meter is a measuring device in which either one or both of the upper and lower sensors are movable, and each sensor measures the distance between the sensors by sandwiching paper (for example, Non-Patent Document 2). . The measurement of the paper thickness with the caliper meter is generally performed after the processing with the calendar device and before the winding with the winding device.

“Practical Knowledge of Paper and Pulp, 6th Edition”, Toyo Keizai Inc., issued December 6, 2007, p. 23 “Paper and Pulp Production Technology Series 6 Papermaking”, Paper and Pulp Technology Association, issued December 14, 1998, p. 461-463

Printing machines have a setting tolerance. In addition, when dealing with product winding, the winding diameter may become the transaction amount. Therefore, highly accurate information is required for the winding diameter of the product winding (product winding diameter). Moreover, it may be required to arrange the product winding diameter.
However, there are many product windings, and it is inefficient to actually measure individual product winding diameters. Attempts have been made to predict the product winding diameter from the paper thickness measured with a caliper meter and the winding length of the winder device, but the product winding diameter cannot be predicted with sufficient accuracy to withstand practical use. For this reason, at the paper production site, the product winding diameter value predicted from the paper thickness using a caliper meter is used as a reference, but it is currently managed based on the product winding diameter measured by physical differences. is there.

  An object of the present invention is to provide a winding system, a prediction method, a secondary winding manufacturing method, and a program capable of accurately predicting a winding diameter of a secondary winding.

In order to solve the above problems, the present invention employs the following configuration.
[1] A first winding device that winds a sheet around a first core;
A second roll that unwinds a sheet from the primary volume obtained by the first winding device and winds the sheet around a second winding core to produce a secondary volume having a smaller winding diameter than the primary volume. Winding device of
A detector for obtaining a detection value corresponding to the thickness of the sheet wound by the first winding device;
An arithmetic processing unit to which the detected value is input;
With
The arithmetic processing unit obtains a thickness T of the sheet constituting the secondary winding based on the detection value, and then, based on the thickness T, the length L _p by the second winding device. It is configured to perform the step of obtaining the winding diameter D _p of the secondary winding which is obtained when the wound sheet,
The thickness T is corrected based on a compression ratio that is a ratio of the thickness of the sheet wound by the second winding device to the thickness of the sheet wound by the first winding device. winding system, which is a value.
[2] The detection value is a detection value corresponding to a thickness of a portion of the sheet wound by the first winding device and wound by the second winding device. The winding system described.
[3 ] The detector is for measuring a winding diameter in the first winding device,
The arithmetic processing unit determines the thickness T based on the winding diameter measured by the detector and information on the length of the sheet wound by the first winding device. The winding system according to [1] or [2] , wherein the winding system is configured to perform a step of obtaining a thickness of a sheet wound by one winding device.
[4] The arithmetic processing unit further performs so determining a length L _k of the sheet winding diameter D _p becomes a predetermined winding diameter D _k of the time taken up by the second take-up device The winding system according to any one of [1] to [ 3 ].
[ 5 ] a first winding device for winding the sheet around the first winding core;
A second roll that unwinds a sheet from the primary volume obtained by the first winding device and winds the sheet around a second winding core to produce a secondary volume having a smaller winding diameter than the primary volume. Winding device of
A detector for obtaining a detection value corresponding to the thickness of the sheet wound by the first winding device;
An arithmetic processing unit to which the detected value is input;
With
When the arithmetic processing unit obtains the thickness T of the sheet constituting the secondary winding based on the detected value, and then winds up with the second winding device based on the thickness T Is configured to obtain a length L _k of a sheet from which a secondary winding having a predetermined winding diameter D _k is obtained ,
The thickness T is corrected based on a compression ratio that is a ratio of the thickness of the sheet wound by the second winding device to the thickness of the sheet wound by the first winding device. winding system, which is a value.
[6] the arithmetic processing unit stops the winding by the second winding device when the length L _p of the wound sheet in the second winding device is the length L _k The winding system according to [ 4 ] or [ 5 ], which is configured to further perform a step of outputting a signal.

[ 7 ] The sheet is wound around the first core by the first winding device, the sheet is unwound from the primary winding obtained by the first winding device by the second winding device, A method for predicting a winding diameter of the secondary winding when winding a sheet around a second winding core to produce a secondary winding having a winding diameter smaller than the primary winding,
Obtaining a detection value corresponding to the thickness of the sheet wound by the first winding device;
Based on the detected value, the thickness T of the sheet constituting the secondary winding is obtained, and then the sheet of length L _p is wound up by the second winding device based on the thickness T. a step of determining the winding diameter D _p of the secondary winding obtained when,
Only including,
The thickness T is corrected based on a compression ratio that is a ratio of the thickness of the sheet wound by the second winding device to the thickness of the sheet wound by the first winding device. is the value, the prediction method.
[8] The detection value is the detection value corresponding to the thickness of the portion wound in the second winding device of the first wound sheet with retractor, [7] The prediction method described.
[9 ] The detector is for measuring a winding diameter in the first winding device,
When determining the thickness T, the first winding device uses the winding diameter measured by the detector and the length information of the sheet wound by the first winding device. The prediction method according to [ 7 ] or [8] , wherein a step of obtaining a thickness of the wound sheet is performed.
[10] further performs the step of winding diameter _{D p} is determined the length _{L k} of the sheet reaches a predetermined winding diameter _{D k} of the time taken up by the second take-up device, [7-9 ] The prediction method as described in any one of.
[ 11 ] The sheet is wound around the first winding core by the first winding device, the sheet is unwound from the primary winding obtained by the first winding device by the second winding device, When a sheet is wound around a second winding core to produce a secondary volume having a smaller winding diameter than the primary volume, the length of the sheet from which a secondary volume having a predetermined winding diameter is obtained is predicted. A prediction method,
Obtaining a detection value corresponding to the thickness of the sheet wound by the first winding device;
Based on the detected value, a thickness T of the sheet constituting the secondary winding is obtained, and then a predetermined winding diameter is obtained when the second winding device winds up based on the thickness T. Determining the length L _{k of the} sheet from which the secondary volume of D _k is obtained;
Only including,
The thickness T is corrected based on a compression ratio that is a ratio of the thickness of the sheet wound by the second winding device to the thickness of the sheet wound by the first winding device. is the value, the prediction method.
[ 12 ] The sheet is wound around the first core by the first winding device, the sheet is unwound from the primary winding obtained by the first winding device by the second winding device, It is a manufacturing method for winding a sheet around a second winding core and manufacturing a secondary winding having a winding diameter smaller than that of the primary winding,
According to the prediction method according to [ 10 ] or [ 11 ], information on the length L _k of the sheet from which a secondary winding having a predetermined winding diameter D _k is obtained when the second winding device winds up is obtained. Obtaining a step;
Stopping the winding by the second winding device when the length L _{p of the} sheet wound by the second winding device becomes the length L _k ;
The manufacturing method of the secondary volume containing.

[ 13 ] a first winding device for winding the sheet around the first winding core;
A second roll that unwinds a sheet from the primary volume obtained by the first winding device and winds the sheet around a second winding core to produce a secondary volume having a smaller winding diameter than the primary volume. Winding device of
A detector for obtaining a detection value corresponding to the thickness of the sheet wound by the first winding device;
An arithmetic processing unit to which the detected value is input;
In a winding system comprising
Based on the detected value, the thickness T of the sheet constituting the secondary winding is obtained, and then the sheet of length L _p is wound up by the second winding device based on the thickness T. A step of determining a winding diameter D _p of the secondary winding obtained sometimes;
A program to be executed by the,
The thickness T is corrected based on a compression ratio that is a ratio of the thickness of the sheet wound by the second winding device to the thickness of the sheet wound by the first winding device. The program that is the value .
[ 14 ] In the winding system,
A step of obtaining a sheet length L _{k at} which a winding diameter D _p when wound by the second winding device is a predetermined winding diameter D _k ;
The program according to [ 13 ], further causing the program to be executed.
[ 15 ] In the winding system,
Stopping the winding by the second winding device when the length L _{p of the} sheet wound by the second winding device becomes the length L _k ,
The program according to [ 14 ], further causing the program to be executed.

  According to the present invention, it is possible to provide a winding system, a prediction method, a secondary winding manufacturing method, and a program that can accurately predict the winding diameter of the secondary winding.

1 is an overall configuration diagram of a winding system according to a first embodiment of the present invention. It is a block diagram which shows the outline of the part of the 1st winding apparatus and the detector in the winding system which concerns on 1st embodiment of this invention. It is a block diagram which shows the outline of the 2nd winding-up apparatus part in the winding system which concerns on 1st embodiment of this invention. It is a graph which shows an example of the data which show the relationship between the detection value (distance from a detector to a reflecting plate) and the winding diameter of a primary volume in the winding system which concerns on 1st embodiment of this invention. It is a graph which shows an example of the data which show the relationship between the thickness of the sheet | seat which comprises a primary volume, and the compression rate at the time of winding up this sheet | seat with a 2nd winding device. It is a graph which shows the relationship between the position of the length direction of sheet | seat which comprises a primary volume, and thickness.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

<Winding system>
As shown in FIG. 1, the winding system 100 according to the first embodiment of the present invention includes a first winding device 1, a second winding device 2, a detector 3, and an arithmetic processing device 4. Is provided.

As shown in FIG. 2, the first winding device 1 includes a winding support drum 11, a winding pressing arm 12, a pair of moving rails 13, a support column 14 that supports the moving rail 13, and a reflection. A plate 15, a first core 17, and a housing 16 installed on the outer periphery of both ends of the first core 17 are provided.
The winding support drum 11 includes a rotation drive mechanism (not shown).
The lower end of the winding pressing arm 12 is rotatably attached to a blanket 12a on the floor, and can be tilted. A roller 12b is rotatably attached to the distal end portion of the winding pressing arm 12. The winding pressing arm 12 includes a hydraulic device (not shown), and the upper end of the winding pressing arm 12 is pressed in a direction inclined toward the winding support drum 11 (left side in FIG. 2).
The housings 16 at both ends of the first core 17 are placed on the pair of moving rails 13.
The detector 3 is installed on the support column 14, and the reflector 15 is installed at a position corresponding to the detector 3 of the winding pressing arm 12.
The first winding device 1 includes a measuring unit (not shown) that acquires information (winding speed, winding time, etc.) indicating the operating state of the first winding device 1, and the measuring unit includes a transmission cable. 5 is connected to the arithmetic processing unit 4. Thereby, information indicating the operating state of the first winding device 1 can be output to the arithmetic processing device 4.

As shown in FIG. 3, the second winding device 2 includes an unwinder 21, a slitter 22, a winder 23, and a second winding core 27.
The unwinder 21 rewinds the wound product 18 (primary winding) formed by the first winding device 1 and sends out the sheet W.
Guide rolls 31, 32, 33 are installed between the unwinder 21 and the slitter 22 and between the slitter 22 and the winder 23. As a result, the sheet W sent out from the unwinder 21 can be passed through the slitter 22 and introduced into the winder 23.
The slitter 22 cuts the sheet W sent out from the unwinder 21 into an arbitrary width along the length direction.
The winder 23 includes a front drum 24 and a rear drum 25. Each of the front drum 24 and the rear drum 25 includes a rotation drive mechanism (not shown).
The second winding device 2 includes a measuring unit (not shown) that acquires information (winding speed, winding time, etc.) indicating the operating state of the second winding device 2, and the measuring unit includes a transmission cable. 6 is connected to the arithmetic processing unit 4. As a result, the information acquired by the measurement unit is output to the arithmetic processing device 4.
The second winding device 2 includes a control unit (not shown) that controls the rotational drive mechanisms of the front drum 24 and the rear drum 25, and the control unit is connected to the arithmetic processing device 4 via the transmission cable 6. It is connected. As a result, a signal output from the arithmetic processing device 4 (a signal for instructing stoppage of winding in the second winding device 2 or the like) is input to the control unit.

The detector 3 is a laser beam type displacement meter. The detector 3 irradiates the reflecting plate 15 installed on the winding pressing arm 12 with a laser beam and receives the reflected light from the reflecting plate 15, and detects from the detector 3 to the reflecting plate 15 by triangulation. Distance information is obtained. The detector 3 continuously obtains information on the distance from the detector 3 to the reflecting plate 15.
The detector 3 is connected to the arithmetic processing unit 4 by a transmission cable 7, and information (detection value) obtained by the detector 3 is output to the arithmetic processing unit 4 as a signal.

The arithmetic processing device 4 includes a timer unit 41, an arithmetic unit 42, and a data holding unit 43.
The timer unit 41 generates time information and outputs it to the calculator 42.
The calculation unit 42 is based on the information input from the detector 3 or the like to the calculation processing device 4 and the information acquired from the data holding unit 43, and the wound material 28 (secondary winding) manufactured by the second winding device 2. ) To obtain the thickness T of the sheet W. Also, based on said thickness T, and obtains the winding diameter D _p of the secondary winding which is obtained when the wound sheet W of length L _p in the second winding device 2. Further, the length L _{k of the} sheet is _obtained such that the winding diameter D _p when wound by the second winding device 2 is a predetermined winding diameter D _k .
The calculation unit 42 converts information (detection value) continuously input from the detector 3 into a thickness T, and associates the obtained thickness T with time information input from the time measuring unit 41. Are acquired and output to the data holding unit 43.
Data holding unit 43 converts the information inputted from the detector 3 to a thickness T in the calculating portion 42, so that information or the like for converting the said thickness T to the winding diameter D _p is stored ing. The information for converting the thickness T to the predicted value of the winding diameter D _p, information inputted from the operation unit 42, arithmetic expressions, the coordinates, the calibration curve, the compression ratio, the correction value, various such core diameter Examples include a fixed number.

As the arithmetic processing unit 4, for example, a computer loaded with a program for causing it to function as the arithmetic control unit in the present invention can be used.
The program may be recorded in advance on a computer, or may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer. Further, a program recorded in advance in a computer and a program recorded in a computer-readable recording medium and read into the computer may be combined.

<Operation of winding system 100>
In the winding system 100, the housings 16 at both ends of the first winding core 17 are placed on the pair of moving rails 13 of the first winding device 1, and the winding support is supported on the first winding core 17. The sheet W supplied by the drum 11 is wound up to form a wound product 18. During winding, the winding pressing arm 12 is pressed toward the winding support drum 11 by a hydraulic device. Along with this, the housings 16 at both ends of the first winding core 17 on the moving rail are pressed toward the winding support drum 11 by the rollers 12b of the winding pressing arm 12. As a result, the surface of the sheet W wound around the first core 17, that is, the surface of the wound material 18 comes into contact with the surface of the rotating winding support drum 11, and the rotational driving force of the winding support drum 11. Is transmitted to the wound product 18, and the winding of the sheet W proceeds.
When the length of the wound sheet W or the wound diameter of the wound article 18 reaches a predetermined value, the winding by the first winding device 1 is finished, and the obtained wound article 18 is obtained. (Primary volume) is transferred to the second winding device 2.
In the second winding device 2, the sheet W constituting the wound material 18 (primary winding) is unwound by the unwinder 21, cut along the length direction by the slitter 22, and the second winding by the winder 23. The core 27 is wound up. At the time of winding, the surface of the sheet W wound around the second winding core 27, that is, the surface of the wound material 28 comes into contact with the surfaces of the rotating front drum 24 and rear drum 25, and The rotational driving force is transmitted to the wound product 28, and the winding of the sheet W proceeds. When the sheet W is wound up to a predetermined length (a predetermined length or a length expected to be a predetermined winding diameter), the winding in the second winding device 2 is finished. As a result, a roll 28 (secondary volume) having a narrower and smaller diameter than the primary volume is obtained.

The sheet W is not particularly limited, and examples thereof include paper, resin film, synthetic paper, and metal foil. Conventionally, paper is preferable in that the error of the predicted value of the winding diameter of the secondary winding is large and the usefulness of the present invention is high.
Examples of the paper include high-quality paper, medium-quality paper, copy paper, art paper, coated paper, craft paper, paperboard, white paperboard, newsprint paper, and reprint paper. Among papers, bulky (low density) paper such as newsprint is particularly preferable.

During winding by the first winding device 1, information on the distance from the detector 3 to the reflection plate 15 is continuously acquired by the detector 3 and input to the arithmetic processing device 4. Information (winding speed, winding time, etc.) indicating the operating state of the first winding device 1 is also continuously input to the arithmetic processing device 4.
First, the arithmetic processing unit 4 determines the winding material 28 (secondary winding) formed by the second winding device 2 based on the value detected by the detector 3 (the distance from the detector 3 to the reflecting plate 15). ) Is determined. Then, based on the thickness T, obtaining the winding diameter D _p of the secondary winding which is obtained when the wound sheet length L _p in the second winding device 2. If necessary, it is also possible to obtain the length L _{k of the} sheet where the winding diameter D _p when it is wound by the second winding device 2 becomes the predetermined winding diameter D _k .
The thickness T, the winding diameter D _p , and the length L _k can be determined, for example, by any of the following methods ( 2 ) to (4). Method (1) is a reference method.

[Method (1)]
The thickness T and Makito径D _p, for example, may be stored in advance in the data storage unit 43 the following data I, it can be obtained by sequentially performing the following steps Al to A4.
Data I: Data indicating the relationship between the distance from the detector 3 to the reflecting plate 15 and the winding diameter of the wound article 18.

Step A1: Based on the detection value of the detector 3, the winding diameter of the wound article 18 is obtained.
Step A2: The thickness t of the sheet wound by the first winding device 1 based on the winding diameter of the wound material 18 and the length information of the sheet wound by the first winding device 1 _r is calculated.
Step A3: a thickness t _r at the end of winding at the first take-up device 1, the thickness T of the sheet constituting the secondary winding.
Step A4: A predicted value D _p of the winding diameter of the secondary winding is calculated from the thickness T and the length L _{p of the} sheet wound by the second winding device 2.
Hereinafter, data I and steps A1 to A4 will be described in detail.

Data I indicates the relationship between the distance from the detector 3 to the reflecting plate 15 and the winding diameter of the wound article 18.
The winding diameter of the wound product 18 increases as the length of the sheet wound around the first core 17 by the first winding device 1 increases. As the winding diameter increases, the wound article 18 moves on the moving rail 13 in the direction opposite to the winding support drum 11 side. Along with this, the winding pressing arm 12 tilts in the direction opposite to the winding support drum 11. Therefore, the distance from the detector 3 installed on the column 14 to the reflecting plate 15 decreases as the winding diameter of the wound article 18 increases. Therefore, the winding diameter of the wound article 18 can be indirectly measured from the information on the distance from the detector 3 to the reflecting plate 15.

As the data I, for example, an expression represented by a curve shown in FIG.
FIG. 4 is a graph in which the horizontal axis represents the distance from the detector 3 to the reflecting plate 15 and the vertical axis represents the winding diameter of the wound article 18 and was actually created by the following procedure.
1. Using the design information of the CAD system (Computer Aided Design System), the relationship (theoretical value) between the distance from the detector 3 to the reflector 15 and the winding diameter is calculated by changing the distance (in this embodiment). 35 points are calculated.)
2. The sheet is actually wound by the first winding device 1 to obtain several points (10 points in the present embodiment) of measured values of distance and winding diameter.
3. The theoretical value of 10 points is replaced with the corresponding actually measured value of 10 points.
From the obtained 35 points (theoretical value 25 points, actually measured value 10 points), using the spreadsheet software “Microsoft (registered trademark) / Excel (registered trademark)” or the like, the detector 3 to the reflector 15 on the horizontal axis. If the third spline curve is created by taking the distance up to and the winding diameter of the wound article 18 on the vertical axis, the winding diameter can be obtained from the distance.

Step A1:
When the signal from the detector 3 is input to the arithmetic unit 42 of the arithmetic processing device 4, the arithmetic unit 42 accesses the data holding unit 43 and refers to the data I held by the data holding unit 43. By referring to the data I, the calculation unit 42 obtains the winding diameter of the wound article 18.

Step A2:
Subsequently, in operation unit 42, by (1) below, it calculates a first retractor 1 in the wound thickness of the sheet (thickness of the sheet constituting the winding material 18) t _r.

ｔ_ｒ：巻取物１８を構成するシートの厚さ。
Ｄ_ｒ：巻取物１８の巻取径。
ｄ_ｒ：第一の巻芯１７の直径（定数値）。
Ｌ_ｒ：巻取物１８を構成するシートの長さ。
π ：円周率

_tr : the thickness of the sheet constituting the wound article 18.
D _r : Winding diameter of the wound material 18.
d _r : diameter of the first core 17 (constant value).
L _r : the length of the sheet constituting the wound article 18.
π: Pi ratio

_tr is equal to the average thickness per total length of the sheets constituting the wound article 18.
L _r can be calculated as the product of the winding speed and the winding time in the first winding device 1 input from the first winding device 1.
D _{r, L r,} t r, respectively, during a winding with a first winding device 1, is calculated every moment. D _r and L _r at the end of winding in the first winding device 1 are the winding diameter of the primary winding and the length of the sheet constituting the primary winding, respectively. First t _r calculated from D _r and L _r at the end of the winding in the winding device 1, is the thickness of the sheet constituting the primary winding (average thickness per total length).

Step A3:
In step A3, the first winding at the end of t _r at the winding device _1, that is, the thickness of the sheet constituting the primary winding (average thickness per total length) of the sheet constituting the secondary winding The thickness is T.
Below, a t _r at the end of the take-up of the first of the take-up device 1 is also referred to as T _r. In addition, the thickness T obtained in step A3 is referred to as thickness _Ta . T _a = T _r .

Step A4:
In Step A4, from the thickness T _a (= T _r ) and the length of the sheet wound by the second winding device 2 (the length of the sheet constituting the secondary volume) L _p , the secondary winding to calculate the winding diameter _{D p.}
Winding diameter _{D p} can be calculated by the following equation (2).

Ｄ_ｐ：二次巻の巻取径（予測値）。
ｄ_ｐ：第二の巻芯の直径（定数値）。
Ｌ_ｐ：二次巻を構成するシートの長さ。
Ｔ_ｒ：第一の巻取装置１での巻き取りの終了時のシートの厚さ。

D _p : Winding diameter (predicted value) of the secondary winding.
d _p : Diameter (constant value) of the second core.
L _p : Length of the sheet constituting the secondary volume.
T _r : the thickness of the sheet at the end of winding by the first winding device 1.

L _p can be calculated as the product of the winding speed and the winding time in the second winding device 2 input from the second winding device 2. When the length of the sheet to be wound by the second winding device 2 is determined, the value may be stored in the data holding unit 43 in advance and referred to when executing step A4. .

After step A4, the arithmetic processing unit 4 may further execute the following step A5.
Step A5: determining the length L _k of the sheet winding diameter D _p becomes a predetermined winding diameter D _k of the time taken up by the second take-up device 2.

Further, the length Lk can be directly _obtained by performing the following step A6 instead of step A4 and step A5.
Step A6: and a thickness _{T a} and the winding diameter _{D k,} determine the length _{L k.}
In step A6, the length _{L k} can be calculated by (2B) the following equation.

Ｄ_ｋ：二次巻の巻取径（定数値）。
ｄ_ｐ：第二の巻芯の直径（定数値）。
Ｌ_ｋ：巻取径がＤ_ｋとなる二次巻を構成するシートの長さ（予測値）。
Ｔ_ｒ：第一の巻取装置１での巻き取りの終了時のシートの厚さ。

D _k : secondary winding diameter (constant value).
d _p : Diameter (constant value) of the second core.
L _k : The length (predicted value) of the sheet constituting the secondary winding having a winding diameter of D _k .
T _r : the thickness of the sheet at the end of winding by the first winding device 1.

When executing step A5 or step A6, after step A5 or step A6, the arithmetic processing unit 4 may further execute the following step A7.
Step A7: a signal for stopping the winding of the second winding device 2 when the length L _p of the wound sheet in the second winding device 2 is the length L _k second winding Output to device 2.
By executing Step A7, a secondary winding having a winding diameter of _Dk can be manufactured with high accuracy.

[Method (2)]
The thickness T and Makito径D _p, for example, may be stored in advance in the data storage unit 43 the following data I-II, it can be obtained by sequentially performing the following steps B1 to B4.
Data I: Data indicating the relationship between the distance from the detector 3 to the reflecting plate 15 and the winding diameter of the wound article 18.
Data II: Data of compression ratio, which is a ratio of the thickness of the sheet constituting the secondary volume to the thickness of the sheet constituting the primary volume.

Step B1: Based on the information input from the detector 3, the winding diameter of the wound article 18 is obtained.
Step B2: The thickness t of the sheet wound by the first winding device 1 based on the winding diameter of the wound material 18 and the length information of the sheet wound by the first winding device 1 _r is calculated.
Step B3: The thickness t _r at the end of winding at the first winding device 1, and corrected based on the information of the compression ratio, the value, and the thickness T of the sheet constituting the secondary winding To do.
Step B4: the thickness T, and a length L _p of the sheet winding at the second take-up device 2, calculates the winding diameter D _p of the secondary winding.
Hereinafter, data I to II and steps B1 to B4 will be described in detail.

  Data I is the same as described above.

  Data II shows the relationship between the density of the sheet in the primary volume and the degree of compression. The sheet W wound up by the first winding device 1 is then rewound by the second winding device 2, cut to a predetermined width, wound up to a predetermined length, Next volume. In the processing step in the second winding device 2, the sheet W is compressed more than the state in the primary winding. The degree of this compression has a correlation with the density of the sheet in the primary winding, and the lower the density, the larger the compression rate.

As the data II, for example, an expression represented by a curve shown in FIG.
FIG. 5 is a graph in which the horizontal axis (x-axis) is the thickness t _{1 of the} sheet constituting the primary winding, and the vertical axis (y-axis) is the compression ratio, which is actually created by the following procedure. is there. R ^{2 in} FIG. 5 represents a coefficient of determination (R is a correlation function).
1. The primary winding is made by the first winding device 1.
2. The surface (upper winding) of the primary winding is broken to obtain a sample 1 for thickness measurement.
3. The thickness of the sample 1 is measured using a micrometer (for example, Mitutoyo 227 series variable measuring force digimatic micrometer). The obtained thickness is defined as a thickness t _{1 of the} sheet constituting the primary winding.
4). This primary volume is applied to the second winding device 2 to make a secondary volume.
5. Break the surface of the second volume of the second wholesale (the second volume first created from the first volume by the second winding device 2) to obtain the sample 2 for thickness measurement (the first wholesale The secondary winding is formed from a sheet on the upper winding side of the primary winding.)
6). Using a micrometer (supra), the thickness of the sample 2 is measured. The resulting thick, and the thickness t ₂ of the sheet constituting the secondary winding.
7). The compression ratio (Winding Compression Ratio) is calculated by the following equation.
Compression rate = t ₂ / t ₁
8). The above 1 to 7 are performed on three kinds of sheets having the same material and basis weight and different thickness t ₁ as the sheet to be actually manufactured for the secondary volume (the higher the thickness, the lower the density of these sheets). ).
9. From the compression ratios obtained for the three types of sheets, the relationship between the thickness t _{1 of the} sheets constituting the primary volume and the compression ratio is calculated using spreadsheet software “Microsoft (registered trademark) / Excel (registered trademark)”. Use linear approximation (least square method).

Step B1:
Step B1 is the same as step A1.

Step B2:
Step B2 is the same as step A2.

Step B3:
In step B3, the calculation unit 42 accesses the data holding unit 43, refers to the data II held by the data holding unit 43, and determines the thickness T _r (the thickness at the end of winding by the first winding device 1). A compression rate R _c corresponding to (t _r ) is obtained. The thickness T _r is corrected from the obtained compression rate R _c to obtain the thickness T corrected by the compression rate.
Hereinafter, the thickness T for obtaining in step B3 that the thickness _{T b.}
The thickness _{T b can} be represented by T r _{R c.}

Step B4:
In Step B4, the secondary is _{calculated from} the thickness T _b (= T _r R _c ) and the length of the sheet wound by the second winding device 2 (the length of the sheet constituting the secondary winding) L _p. to calculate the winding diameter D _p of the wound.
Winding diameter _{D p} can be calculated by the following equation (3).

Ｄ_ｐ：二次巻の巻取径（予測値）。
ｄ_ｐ：第二の巻芯の直径（定数値）。
Ｌ_ｐ：二次巻を構成するシートの長さ。
Ｔ_ｒ：第一の巻取装置１での巻き取りの終了時のシートの厚さ。
Ｒ_ｃ：圧縮率。

D _p : Winding diameter (predicted value) of the secondary winding.
d _p : Diameter (constant value) of the second core.
L _p : Length of the sheet constituting the secondary volume.
T _r : the thickness of the sheet at the end of winding by the first winding device 1.
R _c : compression rate.

After step B4, the arithmetic processing unit 4 may further execute the following step B5.
Step B5: determining the length L _k of the sheet winding diameter D _p becomes a predetermined winding diameter D _k of the time taken up by the second take-up device 2.

In addition, the length Lk can be directly _obtained by performing the following step B6 instead of step B4 and step B5.
Step B6: and a thickness _{T b} and the winding diameter _{D k,} determine the length _{L k.}
In step B6, the length L _k can be calculated by the following equation (3B).

Ｄ_ｋ：二次巻の巻取径（定数値）。
ｄ_ｐ：第二の巻芯の直径（定数値）。
Ｌ_ｋ：巻取径がＤ_ｋとなる二次巻を構成するシートの長さ（予測値）。
Ｔ_ｒ：第一の巻取装置１での巻き取りの終了時のシートの厚さ。
Ｒ_ｃ：圧縮率。

D _k : secondary winding diameter (constant value).
d _p : Diameter (constant value) of the second core.
L _k : The length (predicted value) of the sheet constituting the secondary winding having a winding diameter of D _k .
T _r : the thickness of the sheet at the end of winding by the first winding device 1.
R _c : compression rate.

When executing Step B5 or Step B6, after Step B5 or Step B6, the arithmetic processing unit 4 may further execute the following Step B7.
Step B7: a signal length L _p of the sheet was wound in the second winding device 2 stops the winding at the second take-up device 2 when the L _k second winding device 2 Output to.
By executing Step B7, a secondary winding having a winding diameter of _Dk can be accurately manufactured.

[Method (3)]
The thickness T and Makito径D _p, for example, may be stored in advance in the data storage unit 43 the following data I to III, it can also be determined by sequentially performing the following steps C1 -C4.
Data I: Data indicating the relationship between the distance from the detector 3 to the reflecting plate 15 and the winding diameter of the wound article 18.
Data II: Data of compression ratio, which is the ratio of the sheet when the sheet is wound by the second winding device to the thickness of the sheet constituting the primary winding.
Data III: In the radial direction of the primary winding, when the thickness of the inner (lower winding side) sheet is smaller than the thickness of the outer (upper winding side) sheet, the difference in thickness in the radial direction is Correction value data to be corrected.

Step C1: The winding diameter of the wound article 18 is obtained based on the information input from the detector 3.
Step C2: The thickness t of the sheet wound by the first winding device 1 based on the winding diameter of the wound material 18 and the length information of the sheet wound by the first winding device 1. _r is calculated.
Step C3: the thickness t _r at the end of winding at the first winding device 1, based on the correction value for correcting a difference in thickness in the radial direction, the winding in the second winding device 2 Correct the value according to the thickness of the part to be taken. The value is further corrected based on the compression rate information, and the obtained value is set as the thickness T of the sheet constituting the secondary winding.
Step C4: the thickness T, and a length L _p of the sheet winding at the second take-up device 2, calculates the winding diameter D _p of the secondary winding.
Hereinafter, data I to III and steps C1 to C4 will be described in detail.

  Data I to II are the same as described above.

Data III shows the average thickness per total length when the thickness of the sheet constituting the primary volume (the sheet wound by the first winding device) differs in the radial direction of the primary volume. This is for correcting to a value corresponding to the thickness of the portion wound by the second winding device 2.
In the radial direction of the primary winding, the thickness of the inner (lower winding side) sheet tends to be smaller than the thickness of the outer (upper winding side) sheet. This tendency is particularly remarkable when the density of the sheet is low (for example, when the sheet is paper). Therefore, even in the secondary volume formed from the same primary volume, the secondary volume formed in the relatively first direction (formed from the outer sheet) and the secondary volume formed in the relatively last direction (inner sheet) Even if the wound length is the same, the wound diameter is different from that of the secondary winding. Further, the length required to form the secondary winding having the same winding diameter differs between the outer sheet and the inner sheet.

As the data III, for example, there is a radial thickness correction value set according to the wholesale quantity. The wholesale number indicates the order of the secondary volume manufactured from one primary volume. The slower the order of manufacture, that is, the larger the number of wholesale numbers, the more the sheet is located on the inner side in the radial direction of the primary winding, and the thickness tends to be thinner.
The thickness correction value in the radial direction is determined by the wholesale number and the type of sheet. As an example, in the case of a low density product such as newsprint, the thickness correction value in the radial direction is about 0.15% per wholesale. That is, in a low-density product such as newspaper, the paper thickness corresponding to the second wholesaler is approximately 0.15% smaller than the paper thickness corresponding to the first wholesaler, and the paper corresponding to the third wholesaler. Is about 0.30% smaller than the paper thickness corresponding to the first wholesale.

Step C1:
Step C1 is the same as step A1.

Step C2:
Step C2 is the same as step A2.

Step C3:
In step C <b> 3, the calculation unit 42 accesses the data holding unit 43 and refers to the data II to III held by the data holding unit 43. As a result, the compression ratio R _c corresponding to the thickness T _r (the thickness t _r at the end of winding in the first winding device 1), the sheet type and the wholesale number n (n is a positive integer) ) Corresponding to the thickness correction value R _rc is obtained. The resulting corrected thickness T _r from the compression ratio R _c and thickness compensation value R _rc, obtain thickness T corrected by the compression ratio R _c and thickness compensation value R _rc.
Hereinafter, the thickness T obtained in step C3 is referred to as a thickness _Tc .
The thickness T _c can be represented by T _r R _c {1-R _rc (n−1)}.

Step C4:
In step B4, the thickness T _c (= T _r R _c {1−R _rc (n−1)}) and the length of the sheet wound up by the second winding device 2 (the sheet constituting the secondary winding) from the length) L _p, calculates the winding diameter D _p of the secondary winding.
Winding diameter _{D p} can be calculated by the following formula (4).

Ｄ_ｐ：ｎ卸目の二次巻の巻取径（予測値）。
ｄ_ｐ：第二の巻芯の直径（定数値）。
ｎ ：卸数（ｎ＝１，２，３，・・・）。
Ｌ_ｐ：二次巻を構成するシートの長さ。
Ｔ_ｒ：第一の巻取装置１での巻き取りの終了時のシートの厚さ。
Ｒ_ｃ：圧縮率。
Ｒ_ｒｃ：径方向の厚さ補正値。

D _p : The winding diameter (predicted value) of the secondary volume of the n wholesaler.
d _p : Diameter (constant value) of the second core.
n: Wholesale number (n = 1, 2, 3,...).
L _p : Length of the sheet constituting the secondary volume.
T _r : the thickness of the sheet at the end of winding by the first winding device 1.
R _c : compression rate.
R _rc : thickness correction value in the radial direction.

After step C4, the arithmetic processing unit 4 may further execute the following step C5.
Step C5: determining the length L _k of the sheet winding diameter D _p becomes a predetermined winding diameter D _k of the time taken up by the second take-up device 2.

Further, the length Lk can be directly _obtained by performing the following step C6 instead of the steps C4 and C5.
Step C6: from the thickness _{T c} and the winding diameter _{D k,} determine the length _{L k.}
In step C6, the length _{L k} can be calculated by (4B) the following equation.

Ｄ_ｋ：二次巻の巻取径（定数値）。
ｄ_ｐ：第二の巻芯の直径（定数値）。
Ｌ_ｋ：巻取径がＤ_ｋとなる二次巻を構成するシートの長さ（予測値）。
Ｔ_ｒ：第一の巻取装置１での巻き取りの終了時のシートの厚さ。
Ｒ_ｃ：圧縮率。
Ｒ_ｒｃ：径方向の厚さ補正値。

D _k : secondary winding diameter (constant value).
d _p : Diameter (constant value) of the second core.
L _k : The length (predicted value) of the sheet constituting the secondary winding having a winding diameter of D _k .
T _r : the thickness of the sheet at the end of winding by the first winding device 1.
R _c : compression rate.
R _rc : thickness correction value in the radial direction.

When step C5 or step C6 is executed, after step C5 or step C6, the arithmetic processing unit 4 may further execute the following step C7.
Step C7: a signal length L _p of the sheet was wound in the second winding device 2 stops the winding at the second take-up device 2 when the L _k second winding device 2 Output to.
By executing Step C7, a secondary winding having a winding diameter of _Dk can be accurately manufactured.

[Method (4)]
The thickness T and Makito径D _p, for example, may be stored in advance in the data storage unit 43 the following data I-II, it can be obtained by sequentially performing the following steps D1 to D4.
Data I: Data indicating the relationship between the distance from the detector 3 to the reflecting plate 15 and the winding diameter of the wound article 18.
Data II: Data of compression ratio, which is the ratio of the sheet when the sheet is wound by the second winding device to the thickness of the sheet constituting the primary winding.

Step D1: The winding diameter of the wound article 18 is obtained based on the information input from the detector 3.
Step D2: The thickness t of the sheet wound by the first winding device 1 based on the winding diameter of the wound material 18 and the length information of the sheet wound by the first winding device 1 _r is calculated.
Step D3: Acquire the thickness _tr and the time information input from the time measuring unit 41 in association with each other. Based on the acquired data, the thickness t _{rn of the} portion of the sheet constituting the wound product 18 that is wound up by the second winding device 2 is calculated. The thickness _trn is further corrected based on the compression rate information, and the obtained value is set as the thickness T of the sheet constituting the secondary winding.
Step D4: the thickness T, and a length L _p of the sheet winding at the second take-up device 2, calculates the winding diameter D _p of the secondary winding.
Hereinafter, data I to II and steps D1 to D4 will be described in detail.

  Data I to II are the same as described above.

Step D1:
Step D1 is the same as step A1.

Step D2:
Step D2 is the same as step A2.

Step D3:
In step D <b> 3, during the winding by the first winding device 1, the thickness _tr and the time information input from the timer unit 41 are continuously acquired in association with each other. Based on the acquired data (thickness information associated with time information from the winding start point to the winding end point), the position in the length direction of the sheet constituting the primary winding (winding start position) To the data at the end of winding) and the thickness. Based on the data, the thickness _{trn of the} portion of the sheet constituting the primary winding that is wound by the second winding device 2 is calculated.
This will be described in more detail with reference to FIG. FIG. 6 is a graph in which the horizontal axis represents the position in the length direction of the sheet constituting the primary winding, and the vertical axis represents the thickness of the sheet constituting the wound article 18.
Wholesale number n is, for example 3, if the same winding length of the three secondary windings, 1 grated th, the sheet from the position L ₃ of the end winding to the position L ₂ of the third of the total length The thickness t _{rn used} is the average thickness from position L ₃ to position L ₂ and is determined as (T ₂ + T ₃ ) / 2. Similarly, 2 wholesale eye is used a sheet from the position _{L 2} to the position _{L 1} of the third of the total length, a thickness _{t rn is} determined as _{(T 1 + T 2) /} 2. Further, 3 wholesale eyes are sheets used to position _{L 0} of the winding start from the position _{L 1,} the thickness _{t rn is} determined as _{(T 0 + T 1) /} 2.

Next, the calculation unit 42 accesses the data holding unit 43, refers to the data II held by the data holding unit 43, and obtains the compression rate R _c corresponding to the thickness t _rn . The thickness t _rn is corrected from the obtained compression rate R _c to obtain the thickness T.
Hereinafter, the thickness T obtained in step D3 is referred to as thickness _Td .
The thickness _{T d may} be represented by _t rn _{R c.}

Step D4:
In Step D4, the secondary value is calculated from the predicted value T _d (= t _rn R _c ) and the length of the sheet wound by the second winding device 2 (the length of the sheet constituting the secondary winding) L _p. to calculate the winding diameter D _p of the wound.
Winding diameter _{D p} can be calculated by (5) below.

Ｄ_ｐ：二次巻の巻取径（予測値）。
ｄ_ｐ：第二の巻芯の直径（定数値）。
Ｌ_ｐ：二次巻を構成するシートの長さ。
ｔ_ｒｎ：一次巻を構成するシートのうち第二の巻取装置２で巻き取られる部分の厚さ。
Ｒ_ｃ：圧縮率。

D _p : Winding diameter (predicted value) of the secondary winding.
d _p : Diameter (constant value) of the second core.
L _p : Length of the sheet constituting the secondary volume.
t _rn : the thickness of the portion of the sheet constituting the primary winding that is wound by the second winding device 2.
R _c : compression rate.

After step D4, the arithmetic processing unit 4 may further execute the following step D5.
Step D5: determining the length L _k of the sheet winding diameter D _p becomes a predetermined winding diameter D _k of the time taken up by the second take-up device 2.

Further, the length Lk can be directly _obtained by performing the following step D6 instead of steps D4 and D5.
Step D6: from the thickness _{T c} and the winding diameter _{D k,} determine the length _{L k.}
In step D6, the length _{L k} can be calculated by (5B) the following equation.

Ｄ_ｋ：二次巻の巻取径（定数値）。
ｄ_ｐ：第二の巻芯の直径（定数値）。
Ｌ_ｋ：巻取径がＤ_ｋとなる二次巻を構成するシートの長さ（予測値）。
ｔ_ｒｎ：一次巻を構成するシートのうち第二の巻取装置２で巻き取られる部分の厚さ。
Ｒ_ｃ：圧縮率。

D _k : secondary winding diameter (constant value).
d _p : Diameter (constant value) of the second core.
L _k : The length (predicted value) of the sheet constituting the secondary winding having a winding diameter of D _k .
t _rn : the thickness of the portion of the sheet constituting the primary winding that is wound by the second winding device 2.
R _c : compression rate.

When executing Step D5 or Step D6, after Step D5 or Step D6, the arithmetic processing unit 4 may further execute the following Step D7.
Step D7: When the length L _{p of the} sheet wound by the second winding device 2 becomes L _k , a signal for stopping the winding by the second winding device 2 is sent to the second winding device 2. Output to.
By executing Step D7, a secondary winding having a winding diameter of _Dk can be manufactured with high accuracy.

<Effect>
When the sheet is wound, the thickness is usually reduced by tightening. In particular, in the paper production line, there is a large reduction in thickness when winding is performed by a winding device (first winding device) after the calendar device. Conventionally, the paper thickness is measured after the calendar device and before the winding device. In predicting the product winding diameter, it is possible to predict from experience the degree of thickness reduction in the winding device (first winding device) and winder device (second winding device), and to correct the measured value. Although it is done, the accuracy is insufficient. Also, the difference in accuracy due to the difference in experience is large.

  In the present invention, the sheet thickness is not measured before winding with the winding device as conventionally performed in a general paper production line. After removing the sheet, the thickness of the sheet is measured. When winding with the second winding device, the thickness is reduced little because it is once wound with the first winding device. Therefore, in the present invention, the thickness T of the sheet constituting the secondary winding can be predicted with higher accuracy than before, and the winding of the second winding device is terminated based on the thickness T. Without waiting, the winding diameter of the secondary winding can be accurately predicted. Further, based on the thickness T, it is possible to accurately predict the length of the sheet necessary for obtaining a secondary winding diameter having a desired winding diameter. The next volume can be manufactured.

Accuracy of winding diameter D _p of the aforementioned secondary winding, in descending order of accuracy, the value obtained by the method (4), the value obtained by the method (3), the value obtained by the method (2), a method This is the value obtained in (1). Similarly, the accuracy of the length L _k of the sheet in which the winding diameter D _p when it is wound by the second winding device becomes a predetermined winding diameter D _k is the method (4 ), A value obtained by the method (3), a value obtained by the method (2), and a value obtained by the method (1). What is necessary is just to select suitably according to the precision which desires.

  Although the present invention has been described with reference to the first embodiment, the present invention is not limited to the above embodiment. Each configuration in the above embodiment, a combination thereof, and the like are examples, and the addition, omission, replacement, and other modifications of the configuration can be made without departing from the spirit of the present invention.

  The detector 3 is not particularly limited as long as a detection value corresponding to the thickness of the sheet W after being wound by the first winding device 1 can be obtained. For example, an angle detector that detects a change (angular displacement) of the angle of the winding pressing arm 12 in accordance with a change in the winding diameter of the wound article 18 can be used. When the angle detector is used, data representing the relationship between the angular displacement of the winding pressing arm 12 and the winding diameter of the wound article 18 is held in the data holding unit 43 in advance.

As the detector 3, a detector that directly measures the thickness of the sheet W after being wound by the first winding device 1 may be used. An example of the detector that directly measures the thickness of the sheet W is a caliper meter.
However, the caliper meter is a sensor that measures the paper thickness by directly contacting the paper. Therefore, there is a problem that the measurement accuracy gradually decreases due to the transfer of dirt accumulated on the paper surface to the sensor and accumulation, or when solid foreign matter adhering to the paper surface collides with the sensor. Has the problem of scratching. Further, in order to measure the thickness of the sheet W after being wound by the first winding device 1 with a caliper meter, the wound material 18 is transferred from the first winding device 1 to the reeler device. It is necessary to perform measurement while rewinding the sheet W from the wound product 18 with an apparatus, which is not preferable in terms of production efficiency. Furthermore, it is necessary to consider the influence of tightening in the reeler device.
On the other hand, in the case of a detector that obtains a detection value corresponding to a change in the winding diameter of the wound article 18 and indirectly measures the thickness, such as a laser beam type displacement meter or an angle detector, the detector is Since there is no direct contact with the paper, the above problems do not occur. It can also be measured online and has excellent efficiency.
Therefore, as the detector in the winding system of the present invention, a detector that indirectly measures the thickness of the sheet W after being wound by the first winding device 1 is preferable. In particular, a laser beam type displacement meter is preferable because it can detect a change in the winding diameter of the wound article 18 with higher accuracy than an angle detector.

  In each of the above embodiments, information (winding time and winding speed) for calculating the length of the sheet wound by the first winding device 1 is transferred from the first winding device 1 to the arithmetic processing device 4. Although the example of inputting and calculating by the calculation unit 42 has been shown, the above information is input to a winding length counter meter (not shown) installed separately from the calculation processing device 4, and the calculated data is calculated. You may input into the processing apparatus 4. FIG.

  The winding system 100 has various information (for example, a predicted value such as a winding diameter of the wound material 18 and a sheet thickness, a winding diameter of a secondary winding, a winding frame change time, a winding speed, and a winding length). A display device for displaying information required for operation management) may be further provided.

The effects of the present invention will be specifically described below with reference to examples and comparative examples. The present invention is not limited to these examples. Example 1 is a reference example.

<Target sheet>
As the sheet, high quality paper (64.0 g / m ² ) was used.
In Examples 1 to 3 and Comparative Example 1, the raw materials for the fine paper and the blending ratio thereof were the same.

<Production line configuration>
The line for producing sheets is composed of an on-top multi-cylinder paper machine comprising the following devices (a) to (g), and (h) a winder device that continues off-line. Here, (g) the winding device corresponds to the first winding device, and (h) the winder device corresponds to the second winding device.
In Examples 1 to 3 and Comparative Example 1, the operating conditions of each device were the same.
(A) Wire device: Twin wire former format.
(B) Press device: Transfer twin bar + 4P
(3P shoe press) format.
(C) Pre-dryer device: Double deck + single deck combined type.
(D) Size press apparatus: Gate roll type.
(E) After dryer apparatus: Single deck type.
(F) Calendar device: Hard nip type.
(G) Winding device (first winding device): Surface reel type.
(H) Winder device (second winding device): 2-drum winder type.

<Specifications for secondary volume>
Sheet and the length L _p which constitutes the secondary winding, the diameter d _p of the paper tube winding a secondary winding (which corresponds to the second core.) Were as follows. These are the same in Examples 1 to 3 and Comparative Example 1.
L _p : 15000 [m].
d _p: 110 [mm].

<Example 1>
Papermaking and paper winding are performed on the above-mentioned production line to produce 7 primary windings of 90000m in winding length, and each primary winding to secondary winding (the sheet length L _p constituting the secondary winding is Produced as above). At that time, the winding diameter D _p [mm] of the secondary volume is calculated by the above-described method (1), and the winding diameter (actual value) D of the third wholesaler of the secondary volume corresponding to each primary volume is calculated. _Real [mm] was measured using physical differences.
The detector 3 was a laser beam displacement meter (Keyence Corporation LK-2500), and the arithmetic processing unit 4 was a personal computer having LabVIEW (registered trademark) read as a program.

<Example 2>
D _p was calculated and D _real was measured in the same manner as in Example 1 except that the above method (1) was changed to the above method (2). The compression rate R _c is stored in the data holding unit 43 of the arithmetic processing unit 4 by storing the data II of the above-described method (2) previously prepared for the same high-quality paper as in this embodiment. The value obtained by referring to the data holding unit 43 was used.

<Example 3>
D _p was calculated and D _real was measured in the same manner as in Example 1 except that the above method (1) was changed to the above method (3). The compression rate R _c is stored in the data holding unit 43 of the arithmetic processing unit 4 by storing the data II of the above-described method (2) previously prepared for the same high-quality paper as in this embodiment. The value obtained by referring to the data holding unit 43 was used. The radial thickness correction value R _rc is stored in the data holding unit 43 of the arithmetic processing unit 4 as data III of the above-described method (3) prepared in advance for the same high-quality paper as in this embodiment. A value obtained by referring to the data holding unit 43 was used.

<Comparative Example 1>
Papermaking and paper winding are performed on the above-mentioned production line to produce 7 primary windings of 90000m in winding length, and each primary winding to secondary winding (the sheet length L _p constituting the secondary winding is Produced as above). At that time, the sheet paper thickness was measured by a caliper meter (double-sided contact type) installed between (f) the calendar device and (g) the winding device (first winding device). The paper thickness is regarded as T _r, out of (2) before using the scientific electronic calculator to calculate the winding diameter D _p of the secondary winding from the equation. In addition, the 3 grated th winding diameter (measured value) D _real secondary winding corresponding to each primary winding is measured using a printing variations.

A winding diameter D _p of the secondary winding which is calculated by the method described in each of Examples 1-3 and Comparative Example 1, the winding diameter (measured value) of 3 wholesale th measured secondary winding in printing variations D _real Is shown in Table 1.
Further, from the results, it was calculated _D difference between _p and _{D real} (absolute value) delta. Further, an average value and a standard deviation of the calculated seven differences Δ were calculated. The standard deviation was calculated by the STDEV function of Microsoft (registered trademark) and Excel (registered trademark). The results are shown in Table 1.

From Table 1, winding diameter D _p of the secondary winding which is calculated by the method according to the present invention (method of Example 2 to 3), the winding diameter D _p and the secondary winding which is calculated by the method of Example 1 compared with winding diameter D _p of the secondary winding which is calculated by methods conventionally performed (method of Comparative example 1), the difference Δ is small between the actual measurement value D _real, it can be seen that even smaller variation of the difference Δ .

DESCRIPTION OF SYMBOLS 1 1st winding apparatus 2 2nd winding apparatus 3 Detector 4 Arithmetic processing apparatus 11 Winding support drum 12 Winding pressing arm 13 Rail for movement 14 Support | pillar 15 Reflecting plate 16 Housing 17 First winding core 18 winding Collection (primary volume)
21 Unwinder 22 Slitter 23 Winder 27 Second core 28 Winding (secondary volume)
41 Timekeeping unit 42 Calculation unit 43 Data holding unit 100 Winding system

Claims (15)

A first winding device for winding the sheet around the first winding core;
A second roll that unwinds a sheet from the primary volume obtained by the first winding device and winds the sheet around a second winding core to produce a secondary volume having a smaller winding diameter than the primary volume. Winding device of
A detector for obtaining a detection value corresponding to the thickness of the sheet wound by the first winding device;
An arithmetic processing unit to which the detected value is input;
With
The arithmetic processing unit obtains a thickness T of the sheet constituting the secondary winding based on the detection value, and then, based on the thickness T, the length L _p by the second winding device. It is configured to perform the step of obtaining the winding diameter D _p of the secondary winding which is obtained when the wound sheet,
The thickness T is corrected based on a compression ratio that is a ratio of the thickness of the sheet wound by the second winding device to the thickness of the sheet wound by the first winding device. winding system, which is a value.   2. The winding according to claim 1, wherein the detection value is a detection value corresponding to a thickness of a portion of the sheet wound by the first winding device and wound by the second winding device. Take system. The detector measures a winding diameter in the first winding device,
The arithmetic processing unit determines the thickness T based on the winding diameter measured by the detector and information on the length of the sheet wound by the first winding device. The winding system according to claim 1 or 2 , wherein the winding system is configured to perform a step of determining a thickness of a sheet wound by one winding device. The arithmetic processing unit is configured to further perform a step of obtaining a length L _{k of the} sheet in which the winding diameter D _p when wound by the second winding device becomes a predetermined winding diameter D _k. The winding system according to any one of claims 1 to 3 . A first winding device for winding the sheet around the first winding core;
A second roll that unwinds a sheet from the primary volume obtained by the first winding device and winds the sheet around a second winding core to produce a secondary volume having a smaller winding diameter than the primary volume. Winding device of
A detector for obtaining a detection value corresponding to the thickness of the sheet wound by the first winding device;
An arithmetic processing unit to which the detected value is input;
With
When the arithmetic processing unit obtains the thickness T of the sheet constituting the secondary winding based on the detected value, and then winds up with the second winding device based on the thickness T Is configured to obtain a length L _k of a sheet from which a secondary winding having a predetermined winding diameter D _k is obtained ,
The thickness T is corrected based on a compression ratio that is a ratio of the thickness of the sheet wound by the second winding device to the thickness of the sheet wound by the first winding device. winding system, which is a value. The arithmetic processing unit outputs a signal for stopping the winding by the second winding device when the length L _{p of the} sheet wound by the second winding device becomes the length L _k. The winding system according to claim 4 or 5 , wherein the winding system is further configured to perform the following step. The first winding device winds the sheet around the first core, the second winding device unwinds the sheet from the primary winding obtained by the first winding device, A method for predicting the winding diameter of the secondary winding when the secondary winding is wound around the second winding core and a secondary winding having a winding diameter smaller than the primary winding is manufactured;
Obtaining a detection value corresponding to the thickness of the sheet wound by the first winding device;
Based on the detected value, the thickness T of the sheet constituting the secondary winding is obtained, and then the sheet of length L _p is wound up by the second winding device based on the thickness T. a step of determining the winding diameter D _p of the secondary winding obtained when,
Only including,
The thickness T is corrected based on a compression ratio that is a ratio of the thickness of the sheet wound by the second winding device to the thickness of the sheet wound by the first winding device. is the value, the prediction method. The prediction according to claim 7 , wherein the detection value is a detection value corresponding to a thickness of a portion wound by the second winding device among sheets wound by the first winding device. Method. The detector measures a winding diameter in the first winding device,
When determining the thickness T, the first winding device uses the winding diameter measured by the detector and the length information of the sheet wound by the first winding device. The prediction method according to claim 7 or 8 , wherein a step of obtaining a thickness of the wound sheet is performed. Further performing the step of determining the length L _k of the sheet winding diameter D _p becomes a predetermined winding diameter D _k of the time taken up by the second take-up device, one of claims 7-9 one The prediction method according to the item. The first winding device winds the sheet around the first core, the second winding device unwinds the sheet from the primary winding obtained by the first winding device, In a prediction method for predicting the length of a sheet from which a secondary winding having a predetermined winding diameter is obtained when a secondary winding having a winding diameter smaller than that of the primary winding is manufactured by winding it around a second winding core. There,
Obtaining a detection value corresponding to the thickness of the sheet wound by the first winding device;
Based on the detected value, a thickness T of the sheet constituting the secondary winding is obtained, and then a predetermined winding diameter is obtained when the second winding device winds up based on the thickness T. Determining the length L _{k of the} sheet from which the secondary volume of D _k is obtained;
Only including,
The thickness T is corrected based on a compression ratio that is a ratio of the thickness of the sheet wound by the second winding device to the thickness of the sheet wound by the first winding device. is the value, the prediction method. The first winding device winds the sheet around the first core, the second winding device unwinds the sheet from the primary winding obtained by the first winding device, A manufacturing method for winding a secondary winding core to manufacture a secondary winding having a winding diameter smaller than that of the primary winding,
The step of obtaining information on the length L _k of the sheet from which a secondary winding having a predetermined winding diameter D _k is obtained by the prediction method according to claim 10 or 11 when wound by the second winding device. When,
Stopping the winding by the second winding device when the length L _{p of the} sheet wound by the second winding device becomes the length L _k ;
The manufacturing method of the secondary volume containing. A first winding device for winding the sheet around the first winding core;
A second roll that unwinds a sheet from the primary volume obtained by the first winding device and winds the sheet around a second winding core to produce a secondary volume having a smaller winding diameter than the primary volume. Winding device of
A detector for obtaining a detection value corresponding to the thickness of the sheet wound by the first winding device;
An arithmetic processing unit to which the detected value is input;
In a winding system comprising
Based on the detected value, the thickness T of the sheet constituting the secondary winding is obtained, and then the sheet of length L _p is wound up by the second winding device based on the thickness T. A step of determining a winding diameter D _p of the secondary winding obtained sometimes;
A program to be executed by the,
The thickness T is corrected based on a compression ratio that is a ratio of the thickness of the sheet wound by the second winding device to the thickness of the sheet wound by the first winding device. The program that is the value . In the winding system,
A step of obtaining a sheet length L _{k at} which a winding diameter D _p when wound by the second winding device is a predetermined winding diameter D _k ;
The program according to claim 13 , further executing: In the winding system,
Stopping the winding by the second winding device when the length L _{p of the} sheet wound by the second winding device becomes the length L _k ,
The program according to claim 14 , further executing:

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