JP7703956B2 - Method for removing defective parts of a sheet body capable of dealing with defective parts caused by multiple processes, and winding device - Google Patents

Description

The present invention relates to a defective part removal process in which, while winding a roll-shaped sheet body (hereinafter also referred to as "original web"), winding is stopped once at a defective part to remove the defective part from the original web, and relates to a technology for removing the defective part from the roll-shaped sheet body based on position information of the defective part obtained in a previous process.

The process of removing defects from a roll of sheet material, such as a film for packaging, is carried out, for example, by using a machine called a slitter. The slitter executes the winding process of the roll of sheet material, detects a defect in the sheet material during the winding process, and temporarily suspends the winding process. During the temporary suspension, an operator cuts the parts before and after the defective part from the sheet material, removing the defective part from the sheet material, and rejoins the sheet material at the cut position. Once the rejoining process of the sheet material is completed, the operator resumes the winding process. By repeating this process, multiple defects that were present in the original material are removed.

Generally, in a process preceding a defective portion removal process (slitter process) using a slitter device, a label (such as tape) is applied to defective positions present on a sheet (see Patent Document 1). In the defective portion removal process, winding is stopped at the defective portion based on detection of the label. Note that the preceding process is, for example, a printing process in which printing is performed on the sheet, and the defects are, for example, printing errors or scratches on the sheet itself.
Labeling of defective areas (hereinafter also referred to as "defective areas") is performed, for example, by detecting defects such as printing defects using image processing or the like after winding up the original roll and performing printing processing, but before rewinding it, and then automatically attaching a label to the detected defective area.

Furthermore, defect position information of the defect positions to which labels have been applied in the previous process is also obtained. The position information of the defect portion is obtained by measuring the winding length of the rewinding up to each defect position with a measuring unit (encoder, etc.) as in Patent Document 1. In this way, the defect position of each defect portion is defined by the winding length from the start of measurement on the core side of the roll winding to the defect position.
In Patent Document 1, each piece of defect position information obtained in the previous process is converted into a length to each defect position based on the position of the start side of winding (outside of the roll) on the original roll during the defect removal process, and based on each piece of converted defect position information, the roll is rewound by an amount corresponding to the amount of winding from the start of winding to each defect position. Every time the corresponding label is checked, winding is stopped, and during the stoppage, an operator performs the process of removing the defective part and the process of rejoining.

Japanese Patent Application Publication No. 3-45345

As described above, in the defective portion removal step, while the original web is being wound up, the position of the defective portion is detected based on the label attached to the sheet body, and the winding is stopped.
Here, the operation of winding the original web in the slitter device is performed at a high speed for work efficiency. Therefore, in order to reliably stop winding at the next defective position (label position), the winding speed is slowed down from the high speed to a slow operation just before the defective position, and the label is checked during the slow operation, so that winding can be reliably stopped at the defective part.

At this time, if the reference position for starting winding is shifted, the accuracy of the information on each defect position decreases. Therefore, in Patent Document 1, the position of each defect is estimated sequentially using the number of turns (the length to the defect position) from a reference position set on the outside of the original roll to each defective position, making it possible to temporarily stop at the defective positions.
Here, when winding is stopped at a position detected as a defective part in the previous process, the worker cuts the front and rear parts including the defective part with a cutter of the slitter device and performs a rejoining process. Due to the defective part removal process, the defective position information obtained in the previous process contains errors for the positions of the subsequent defective parts, and the errors accumulate as the defective part removal process is repeated. In other words, the accumulated errors become larger as the number of times the defective part removal is performed increases.

For this reason, in order to prevent missed detection of defective parts due to missed label detection (passing over defective parts), conventionally, the vehicle was switched to slow driving, for example, 100 m before the next scheduled stop position based on the defective part information. The longer the period of slow driving, the longer the time required for the defective part removal process.
In addition, the system switches to slow operation, for example, 100 m before the target, but in the past, in order to reduce the speed loss caused by slow operation, an operator would visually monitor the conveyed sheet body or label and manually temporarily increase the conveying speed during slow operation as appropriate. However, for an operator to visually monitor and work for 100 m of sheet body leads to an increased burden on the operator.

The present invention was developed with the above points in mind, and aims to reduce the speed loss during the defective part removal process while minimizing the burden on the worker.

A defective part removal method according to one aspect of the present invention is a defective part removal method in which a roll-shaped sheet body is wound up, and based on position information of defective parts in the sheet body acquired in a previous process, the winding is temporarily stopped before each defective part, and a part of the sheet body containing the defective part is removed from the sheet body, and the previous process is characterized in that it includes a label detection device that applies a defective label to each defective part caused by each previous process and detects the defective labels, a label distance calculation process that, among the defective labels applied in the same previous process, determines the defective label closest to the winding end of the sheet body as the first label, the next closest defective label as the second label, and calculates the distance between the first defective label and the second defective label as the label distance, and a stop control process that stops the sheet body based on the label distance calculated by the label distance calculation process.

Furthermore, a defective part removal method according to one embodiment of the present invention is characterized in that it includes a slow-motion control process for operating the sheet body at a slow speed based on the label-to-label distance calculated in the label-to-label distance calculation process, and a slow-motion/stop selection process for selecting either the stop control process or the slow-motion control process.
A defective part removal method according to one embodiment of the present invention is characterized in that the position information of the defective part includes a removal distance of the defective part adjacent to the defective label, and further comprises a removal distance subtraction step of subtracting the removal distance from the label-to-label distance calculated in the label-to-label distance calculation step.

A defective portion removal method according to one embodiment of the present invention is characterized in that it includes a step of calculating a distance before slowing down and stopping, which calculates a distance before slowing down and stopping Z (m) until the second and subsequent defective labels are slowed down and stopped, based on the label distance Y (m) calculated in the label distance calculation step, using the following formula (1):
Z = aY + b...Formula (1)
−10≦a≦10
0≦b≦99

The defective part removal method according to one aspect of the present invention is characterized in that, in the pre-process, the position information of the defective part is converted into a barcode, the converted barcode is displayed on an arrangement card and attached to the sheet body, and, after the pre-process is completed, in the process of removing the defective part, a code reading process is provided in which the barcode displayed on the arrangement card is read.

The winding device according to one aspect of the present invention is a winding device that winds up a roll-shaped sheet body and can temporarily stop winding before each defective part based on position information of the defective part in the sheet body acquired in a previous process, and there are multiple previous processes, and a defective label is attached to each defective part caused by each previous process, and when the sheet body is temporarily stopped by the winding device, the part of the sheet body including the defective part can be removed from the sheet body, and the winding device is characterized in that it is equipped with a label detection device that detects the defective label, a label distance calculation unit that, among the defective labels attached in the same previous process, calculates the distance between the first defective label and the second defective label as the label distance, and a stop control unit that stops the sheet body based on the label distance calculated by the label distance calculation unit.

A winding device according to one embodiment of the present invention is characterized in that the winding device is provided with a slow-motion control unit that causes the sheet body to move slowly based on the label distance calculated by the label distance calculation unit, and a slow-motion/stop selection unit that can select either the stop control unit or the slow-motion control unit.
A winding device according to one embodiment of the present invention is characterized in that the position information of the defective portion includes the removal distance of the defective portion adjacent to the defective label, and the winding device is equipped with a removal distance subtraction unit that subtracts the removal distance from the label distance calculated by the label distance calculation unit.

A winding device according to one embodiment of the present invention is characterized in that the winding device is provided with a memory unit capable of presetting and storing an error correction coefficient a (%) for the inter-label distance Y (m) and a minimum stopping distance b (m) of the sheet body, and a slow-down/pre-stop distance calculation unit that reads out the error correction coefficient a and the minimum stopping distance b stored in the memory unit and calculates a slow-down/pre-stop distance Z (m) until the second and subsequent defective labels are slowed down and stopped based on the inter-label distance Y calculated by a pre-stop distance calculation unit, using the following equation (2):
Z = aY + b...Formula (2)
−10≦a≦10
0≦b≦99

According to one aspect of the present invention, the accuracy of sheet stopping control can be improved by temporarily suspending the second and subsequent defective labels based on the distance between adjacent defective labels in the same previous process.

1A is a development view showing the relationship between the sheet body and defective labels in each process in an embodiment based on the present invention, FIG. 1A is an SL process, FIG. 1B is a DL process, and FIG. FIG. 2 is an explanatory diagram illustrating a process flow according to an embodiment of the present invention. FIG. 2 is a schematic diagram illustrating a first pre-process in the embodiment based on the present invention. FIG. 2 is a block diagram of the periphery of a defect processing controller in a first front-end process according to an embodiment of the present invention. FIG. 11 is a schematic diagram illustrating a second pre-process in the embodiment based on the present invention. FIG. 2 is a development view showing the relationship between a sheet body and a label in the embodiment based on the present invention. FIG. 1 is a schematic diagram illustrating a defective portion removing step according to an embodiment of the present invention. FIG. 11 is a development view showing the relationship between the sheet and defective labels in the embodiment based on the present invention. This is a plan view illustrating an arrangement card according to an embodiment of the present invention. 1 is a diagram illustrating the relationship between label position and distance to the label in an embodiment based on the present invention. 10, this is a table including a development showing the relationship between the sheet body and the defective labels. Following FIG. 11, this is a diagram showing the first defective portion being removed. Following FIG. 12, this is the second diagram showing the removal of the defective portion. Following FIG. 13, this is the third diagram showing the removal of the defective portion. Following FIG. 14, this is the fourth diagram showing removal of defective portions. FIG. 2 is an explanatory diagram of an example of a display screen of a display device in the embodiment based on the present invention. FIG. 2 is a block diagram illustrating a control device of the defect removal system according to the embodiment of the present invention. FIG. 4 is an explanatory diagram for explaining the relationship between the winding length and the conveying speed in the embodiment based on the present invention. 11 is a table illustrating a relationship between the distance between labels and the distance before slowing down/stopping in the embodiment based on the present invention. 20 is a graph corresponding to FIG. 19 . 1 is a graph for explaining an example of a relationship between a conventional specification and a new specification in the embodiment based on the present invention. 22 is a graph showing another example corresponding to FIG. 21 . FIG. 1A is a graph showing an error between SL and DL labels, and FIG. 1B is a chart illustrating the average error and the variation between SL and DL labels, according to an embodiment based on the present invention. FIG. 11 is a development view showing the relationship between the sheet body and the label in the ST process in the embodiment based on the present invention. 25 is a diagram illustrating FIG. 24 . 1A to 1C are explanatory diagrams illustrating a process flow of a defect removal method according to an embodiment of the present invention.

(Features of the embodiment based on the present invention)
The first point of the embodiment based on the present invention is that, as shown in FIGS. 24 and 25, the inter-label distances X1-2 and Y1-2 are used to temporarily stop the second and subsequent defective labels 60.
The second point is that, as shown in FIG. 12, the position information of the defective part transferred from the previous process 30 includes the removal distance of the defective part adjacent to the defective label 60, but after the defective part is removed, the removal distance is subtracted from the inter-label distances X1-2, Y1-2.
The third point is that, as shown in FIG. 12, the inter-label distances X1-2, Y1-2 are corrected using the error correction coefficient a and the minimum stopping distance b of the sheet 40.
According to the first point, by using the label distances X1-2 and Y1-2, the influence of winding and removal in the previous process 30 can be reduced as shown in FIG.
According to the second point, by subtracting the removal distance from the inter-label distances X1-2, Y1-2, the positioning accuracy of the stop control and slow-motion control can be improved.
According to the third point, by correcting the inter-label distances X1-2, Y1-2 using the error correction coefficient a and the minimum stopping distance b, the influence of measurement errors of the encoder, etc. in the previous process 30 can be reduced, and the positional accuracy of the stop control and slow-motion control can be improved.

(Description of the embodiment of the present invention)
Next, an embodiment of the present invention will be described with reference to the drawings.
In this embodiment, as shown in Figures 3, 5 and 7, a long sheet body 40 is rolled into a raw material 41, and the process of pre-processing 30 and the process of removing defective parts 20 are performed in this order as shown in Figure 2 as an example.
The pre-process 30 will be described taking as an example a case in which each process of (1) a first pre-process 31 and (2) a second pre-process 32 is executed in this order.
The first pre-processing step 31 is also referred to as the "SL process" or "printing process", and the second pre-processing step 32 is also referred to as the "DL process" or "lamination process".

(First pre-process 31 (SL process, printing process))
As shown in FIG. 3, the first pre-process 31 winds up a roll-shaped sheet body 40, continuously prints on the sheet body 40 while it is being transported using a printing device 200, and then winds up the printed sheet body 40 using a first winding machine 250 to once again produce a roll-shaped original material 41.

(Regarding defect location information and labeling process)
As shown in FIG. 3, in the first pre-process 31, a defect detection device 210, a first labeler 220, and a first defect processing controller 230 are provided along the sheet body 40 between the printing device 200 and the first winding machine 250.
The defect detection device 210, the first labeler 220, and the first defect processing controller 230 continuously perform defect detection processing on the rolled-up sheet body 40, and perform a process of attaching a label to the position of the detected defective part and obtaining defect position information of the defective part and storing it in the first memory unit 240.
Here, the labels are labeled LV1, LV2, and SL1 to SL4 as shown in Fig. 6. LV1 and LV2 are also called "reference labels", and SL1 to SL4 are also called "defective labels 60" as shown in Fig. 1.

(Failure detection device 210)
As shown in FIG. 4, the defect detection device 210 includes an image processing unit 211A and a second transport amount measuring unit 211B that measures the transport amount of the sheet 40.
(Image processing unit 211A)
4, the image processing unit 211A includes an imaging unit 211Aa that captures an image of the surface of the conveyed sheet 40 at a predetermined sampling period, and a defect detection unit 211Ab that performs image processing on the image captured by the imaging unit 211Aa and determines whether or not there is a defect in the captured image through the image processing. The defect detection unit 211Ab outputs a detected defect detection signal to the first defect processing controller 230.

(Second transport amount measuring unit 211B)
4, the second transport amount measuring unit 211B measures the length of the transported sheet body 40 at a predetermined sampling period, and outputs the measurement information to the first defect processing controller 230. The second transport amount measuring unit 211B is also called an "encoder."
(First failure handling controller 230)
As shown in FIG. 4, the first defect processing controller 230 outputs defect position information, which is information from the measurement start position to the defect position, to the first memory unit 240 based on the measurement information from the second conveying amount measurement unit 211B and the defect detection signal from the image processing unit 211A, and also performs tracking of each defect position and supplies a label attachment signal to the first labeler 220 in synchronization with each defect position reaching the first labeler 220.

(First Labeler 220)
When the first labeler 220 inputs a label attachment signal from the first defect processing controller 230, it executes a process of attaching labels LV1, LV2 (reference labels) and labels SL1 to SL4 (defective label 60 shown in FIG. 1(a)) to one end side of the sheet body 40 in the width direction, as shown in FIG. 6.
(Second pre-process 32 (DL process, lamination process)
5, in the second pre-process 32, a laminating device 300 continuously performs a laminating process on the rolled sheet 40 that has been printed and is being rewound and transported. The sheet 40 after the lamination process is wound up by a second winder 350 and processed again into a rolled raw material 41.

(Regarding defect location information and labeling process)
5, in the second pre-process 32, similarly to the first pre-process 31, a defect detection device 310, a second labeler 320, and a second defect processing controller 330 are provided along the sheet body 40 between the laminator 300 and the second winder 350. Labels DL1, DL2 (defective labels 60 shown in FIGS. 1(b) and (c)) are attached to defective parts such as lamination defects, and defect position information consisting of the length from the measurement start position to the defective part is calculated and stored sequentially in the second memory unit 340.
Here, the labels DL1 and DL2 are also referred to as "defective labels 60" hereinafter, as shown in FIGS.
The defect detection device 310 , the second labeler 320 , and the second defect processing controller 330 in the second pre-process 32 have the same configuration as those provided in the first pre-process 31 .
However, the defect detection device 310 also detects the labels SL1 to SL4 affixed in the first pre-process 31. Furthermore, if the defect detection device 310 does not detect the labels SL1 to SL4, the first label detection device 360 detects the labels SL1 to SL4 affixed in the first pre-process 31. The first label detection device 360 is disposed between the defect detection device 310 and the second labeler 320.
The second defect processing controller 330 also executes a process of recalculating the label defect position information detected by the defect detection device 310 or the first label detection device 360 and updating the information in the second storage unit 340 .

(Reference label processing unit 330A)
As shown in FIG. 5, the second defect processing controller 330 includes a reference label processing section 330A.
The reference label processing unit 330A applies a reference label (not shown) to the outside of the winding (outside of the roll) of the sheet body 40, which is a label for indicating the end of measurement and for removing defects, and outputs position information of the label application position of the reference label to the second memory unit 340.

(Defective part removal process 20)
After the second pre-process 32 is completed, the process proceeds to a defect removing process 20 as shown in Fig. 2. The defect removing process 20 will hereinafter also be referred to as an "ST process."
The defect removal process 20 is configured around a defect removal system 10 as shown in FIG.

(Defective part removal system 10)
As shown in FIG. 7 , the defective part removal system 10 winds up a roll-shaped sheet body 40 to which a laminate material has been bonded, and based on the positional information of the defective parts in the sheet body 40 obtained in the previous process 30, temporarily suspends the winding just before each defective part, and removes the portion of the sheet body 40 that includes the defective parts from the sheet body 40.
The defective part removal system 10 includes (1) a winding device 100, (2) a conveying path 110, (3) a working position 120, (4) a second label detection device 130, and (5) a second conveying amount measurement unit 150.
(1) to (5) will be described later.

(Take-up device 100)
As shown in FIG. 7, the winding device 100 is located on the winding side of the original web 41 and winds up the sheet body 40 set on a transport path 110 .

(Transport path 110)
As shown in FIG. 7, the following positions are preset on the conveying path 110:
The following items (1) to (3) will be described later.
(1) Base point P1 of working position 120
(2) Stop position P2
(3) Slow start position P3

(Working position 120)
As shown in FIG. 7, the work position 120 is disposed midway along the transport path 110 and performs the work of removing portions, including defective portions, of the sheet 40 being transported along the transport path 110 .

(Second label detection device 130)
As shown in FIG. 7, the second label detection device 130 is disposed along the conveying path 110 and detects defective labels 60 attached to the sheet 40 conveyed along the conveying path 110 .
As shown in FIG. 8, there are a plurality of second label detection devices 130, each of which is made up of a first sensor 131 and a second sensor 132.
The first sensor 131 is disposed on the right side of FIG. 8, and detects the defective labels 60 at SL1, SL2, and SL3.
The second sensor 132 is disposed on the left side of the figure, and detects the defective labels 60 DL1 and DL2.

(Second transport amount measuring unit 150)
The second transport amount measuring unit 150 is for measuring the transport amount of the sheet body 40 transported along the transport path 110, and is configured by, for example, a yard meter. The second transport amount measuring unit 150 is also called an "encoder."

(Base point P1 of working position 120)
The base point P1 is set at the start point of the work position 120 as shown in FIG.
(Stop position P2)
7, the stop position P2 is set a predetermined distance L1 (e.g., 2 m) in front of the base point P1 of the work position 120. The stop position P2 is a position where the conveyance of the sheet 40 is stopped when a defective label 60 is located there.

(Slow speed start position P3)
7, the slow-start position P3 is located a predetermined distance (not shown) before the working position P1, that is, further before the stop position P2. The slow-start position P3 is a position where the sheet 40 is slowed down at a slow-start speed slower than the normal conveying speed when a defective label 60 is located at the Z position, as shown in FIG.

(Control device 140)
The defect removing system 10 includes a control device 140 as shown in FIG.
Although not shown, the control device 140 is configured with a CPU as its core, and is configured by a microcomputer equipped with a ROM, a RAM, an I/O port, etc. The CPU functions as each of the sections 400 to 470 by reading various programs and data stored in the ROM, HDD, etc.
17, the control device 140 includes (1) a third storage unit 400, (2) an inter-label distance calculation unit 410, (3) a stop control unit 420, (4) a slow-down control unit 430, (5) a slow-down/stop selection unit 440, (6) a removal distance subtraction unit 450, (7) a slow-down/pre-stop distance calculation unit 460, and (8) a code decoding unit 470. (1) to (8) will be described later.

As shown in FIG. 17, the control device 140 has an input stage connected to (1) a second conveyance amount measuring unit 150, (2) a second label detection device 130, (3) an input unit 160, and (4) a code reader 170.
(3) and (4) will be described later.
In addition, (5) the winding device 100, (6) the slitter device 180, and (7) the display device 190 are connected to the output stage of the control device 140.
(6) and (7) will be described later.

(Input unit 160)
The input unit 160 is composed of, for example, a keyboard, a mouse, and the like, and is used to input various commands and data to the control device 140 .

(Code reader 170)
The code reader 170 is for reading the bar code 51 displayed on the sorting card 50 (see FIG. 9).

(Slitter device 180)
The slitter device 180 cuts the sheet 40 in the width direction with its cutter at the work position 120 .
The slitter device 180 may not only cut off defective portions, but also include a roll processing machine that cuts (slits) the sheet body 40 in the longitudinal direction at a desired width and simultaneously rewinds it into a roll.

(Display device 190)
The display device 190 is, for example, a display, and displays a control screen on its display surface, for example, as shown in FIG.

(Third storage unit 400)
As shown in FIG. 17, the third storage unit 400 is capable of storing various types of information input via the input unit 160 and the code reader 170 connected to the control device 140 .
One of the various types of information includes information sent from the previous process 30 (including information on the location of the defective portion).
The third storage unit 400 also includes an error correction coefficient a (%) for the inter-label distance (m) and a minimum stopping distance b (m) of the sheet 40, both of which are preset via the input unit 160.
(Inter-label distance calculation unit 410)
The label distance calculation unit 410 regards the defective label 60 closest to the upper end of the sheet 40 as the first defective label 60 among the defective labels 60 applied in the same previous process 30, and regards the next defective label 60 as the second defective label, and calculates the distance between the first defective label SL1, DL1 and the second defective label SL2, DL2 as the label distances X1-2, Y1-2.

(Stop control unit 420)
The stop control unit 420 is for stopping the sheet body 40 based on the inter-label distances X1-2, Y1-2 calculated by the inter-label distance calculation unit 410. As shown in Fig. 17, the stop control unit 420 executes stop control of the sheet body 40 by controlling the drive of the winding device 100 connected to the control device 140. Basically, when the inter-label distances X1-2, Y1-2 become "0" m, the stop control unit 420 stops the drive of the winding device 100 and stops the sheet body 40.

(Slow-down control unit 430)
The slow-motion control unit 430 is for slowly moving the sheet body 40 based on the inter-label distances X1-2, Y1-2 calculated by the inter-label distance calculation unit 410. The slow-motion control unit 430, like the stop control unit 420, controls the drive of the winding device 100 to slowly move the sheet body 40, as shown in FIG.

(Slow down/stop selection unit 440)
The slow-go/stop selection unit 440 can select the stop control unit 420 or the slow-go control unit 430. As shown in Fig. 17, the slow-go/stop selection unit 440 executes the selection by operation from the input unit 160 connected to the control device 140. Specifically, the selection is executed by operating the switch between "slow-go" and "stop" shown in Fig. 16.

(Removal distance subtraction unit 450)
The removal distance subtraction section 450 subtracts the removal distance from the inter-label distances X 1 - 2 and Y 1 - 2 calculated by the inter-label distance calculation section 410 .

(Slow-down/pre-stop distance calculation unit 460)
The distance before slowing down/stopping calculation unit 460 calculates the distance Z (m) before slowing down/stopping the second and subsequent defective labels SL2, DL2 using the following formula (1).
Z = aY + b...Formula (1)
“Y” means the “label distance” and is calculated by the label distance calculation unit 410 .
"a" means an "error correction coefficient" for the inter-label distance, and is displayed using, for example, "%". The error correction coefficient a is set in advance, stored in the third storage unit 400, and read out from the third storage unit 400. The error correction coefficient a is set within the following range, and can take "positive" values as well as "negative" values.
−10≦a≦10
"b" means the "minimum stopping distance" of the sheet body 40, and is displayed using, for example, "m." The minimum stopping distance b is set in advance, stored in the third storage unit 400, and read out from the third storage unit 400. The minimum stopping distance b is set within the following range.
0≦b≦99
The error correction coefficient a and the minimum stopping distance b are obtained by grasping the tendency of the encoder error in the pre-process 30 and the defective portion removing process 20.

(Code Decoding Unit 470)
17, the code decoding unit 470 decodes the barcode read through the code reader 170 connected to the control device 140. After decoding, the code decoding unit 470 extracts the information sent from the previous process 30 (including the position information of the defective part) and stores it in the third storage unit 400.

(Explanation of the distance to the defective label 60 shown in FIGS. 10 to 15)
The distance to the defective label 60 will be described with reference to FIGS.
(Before input shown in FIG. 10)
FIG. 10 shows the state before input.
The upper row contains the columns "Total winding length", "1st sheet (m)", "2nd sheet a = (%)", and "2nd sheet b = (m)". "Total winding length" refers to the "total winding length" of the original roll 41. "1st sheet (m)" refers to the minimum stopping distance applied to the "1st" defective label SL1, DL1. "2nd sheet a = (%)" refers to the error correction coefficient a applied to the "2nd" and subsequent defective labels SL2, DL2. "2nd sheet b = (m)" refers to the minimum stopping distance b applied to the "2nd" and subsequent defective labels SL2, DL2.
The lower section is in table format, with the following columns: "No.", "Removal completed", "Label position (m)", "Process No.", "Removal distance (m)", "Distance to label (m)", and "Distance before stopping (set value)".
Here, the "removal distance" refers to the distance of consecutive defective points following the defective label 60. The "removal distance" may be displayed as, for example, the "number of removals" or the "amount of removal."
This is also called the "removal distance."
In the row of the column "No.", numbers from "1" to "10" are written. The numbers indicate the "number" of defective labels 60.

(See FIG. 11, after input (when set))
An input value at the time of setting is inputted in Fig. 11. The input value is inputted to the control device 140 by the input unit 160 or the code reader 170 in Fig. 17, and is stored in the third storage unit 400. If the input value has already been stored in the third storage unit 400, it is read out from the third storage unit 400 and inputted.
In the upper row, "8000" m is entered for "total winding length,""50" m for "1st sheet,""0.2"% for "2nd sheet a=", and "20" m for "2nd sheet b=".
In the lower row, the "Label Position" column has "7000" m, "5000" m, "3000" m, and "1000" m input in that order for the row "No." from "1" (first sheet) to "4" (fourth sheet).
The "7000" m in the "1" (first page) line of "No." means that it is located "1000" m away from the "winding" as shown in the development diagram at the bottom.

Similarly, "1", "2", "2", and "1" are input in that order in the "Process No." column.
"1" refers to the "first pre-process 31" of the pre-process 30, and "2" refers to the "second pre-process 32."
The "removal distance" in the column is all entered as "10" m.
"1000" m is entered as the "distance to label" of "No. 1." Since the "total winding length" is "8000" m and the "label position" of "No. 1" is "7000" m, "7000" m is subtracted from "8000" m. The subtraction is performed by the control device 140 in FIG. 7.
The "distance to label" fields for "No. 3" and "No. 4" are left blank.
Similarly, "3000" m is entered in the "distance to label" field for "No. 2."
In the "distance before stopping (set value)" of "No. 1", the set value for the "first sheet", "50" m, is input.
Similarly, "50" m is input to the "distance before stopping (set value)" of "No. 2."
The "distance before stopping (set value)" for "No. 3" and "No. 4" is left blank.

(When removing the defective part "No. 1" shown in FIG. 12)
FIG. 12 shows the time when the defective portion "No. 1" is removed after advancing "1000 m".
Since the traveled distance is "1000 m", the "distance to label No. 1" is subtracted from "1000 m" and changes to "0 m." The subtraction is performed by the control device 140 in FIG.
When "○" is entered in "Removal Complete" of "No. 1", the "Distance to Label" of "No. 2" is changed to "1990 m" by subtracting the progress distance of "1000 m" and the "Distance to Removal" of "10 m" from "3000 m". The subtraction of "10 m" from the "Distance to Removal" is performed by the distance to be removed subtraction unit 450 in FIG. 7.
At this time, "5990 m" is entered in the "distance to label" of "No. 4." The "distance to label" of "No. 4" is "7000 m," but the traveled distance of "1000 m" and the "removed distance" of "10 m" are subtracted.
"32 m" is input to the "distance before stopping (set value)" of "No. 4." The "distance before stopping" is calculated by the slow-down/stop distance calculation unit 460 in FIG.
At this time, the "error correction coefficient a" is set to "0.2"% for "second piece a=", and the "minimum stopping distance b" is set to "20" m for "second piece b=".

(When removing the defective part "No. 2" shown in FIG. 13)
FIG. 12 shows the time when the defective portion "No. 2" was removed after advancing "2000 m".
Since the traveled distance is "2000 m", the "distance to label No. 2" is subtracted from "1990 m" and changes to "0 m".
When "○" is entered in "Removal Completed" for "No. 2,""1980m" is entered in "Distance to Label" for "No. 3." Because the "Distance to Label" for "No. 3" is "5000 m," the first travel distance of "1000 m," the second travel distance of "2000 m," and the "Removal Distances" of "No. 1" and "No. 2" of "10 m" and "10 m" (a total of 3020 m) are subtracted.
A value of "24 m" is input to the "distance before stopping (set value)" of "No. 3." This is calculated by the slow-down/stop distance calculation unit 460 of FIG.
The "distance to label" of "No. 4" changes from "5990 m" to "3980 m." The "distance to label" of "No. 4" is "5990 m" minus the traveled distance of "2000 m" and the "removal distance" of "No. 2" of "10 m" (a total of 2010 m).

(When removing the defective part "No. 3" shown in FIG. 14)
FIG. 14 shows the time when the defective portion "No. 3" was removed after 2000 m advance.
The "distance to label" of "No. 3" is subtracted from "1980 m" and changes to "0 m".
When "○" is entered in "Removal Complete" for "No. 3," the "Distance to Label" for "No. 4" changes from "3980 m" to "1970 m." The "Distance to Label" for "No. 4" is "3980 m" minus the traveled distance of "2000 m" and the "Removal Distance" of "No. 3" of "10 m" (a total of 2010 m).

(After removing the defective part "No. 3" shown in FIG. 15)
FIG. 15 shows the time when the defective portion "No. 4" was removed after 2000 m advance.
The "distance to label" of "No. 4" is subtracted from "1970 m" and changes to "0 m".
The defective part "No. 4" is removed, "○" is entered in the "Removal completed" input field for "No. 4", the "Distance to label (m)" for "No. 1 to 4" all become "0", and the defective part removal process 20 is completed.

(Explanation of the display screen of the display device 190 shown in FIG. 16)
FIG. 16 shows an example of a display screen of the display device 190, which is controlled by the control device 140 shown in FIG.
On the left side of the screen in FIG. 16, there is arranged a table similar to the one arranged in the lower part described above with reference to FIGS.
In the upper part on the right side of the screen, there is arranged a table similar to the table arranged in the upper part described above with reference to FIGS.
Various icons for operation are located at the bottom right of the screen.
Regarding the reference label (not shown), icons "Yes" and "No" are arranged so that they can be alternatively selected.
To the right of the icon, there is arranged an icon for "Control when label is reached", in which the icons "Slow down" and "Stop" can be alternatively selected.
At the bottom, there is an icon for "Clear all label position input."

(Explanation of the diagram shown in FIG. 19)
FIG. 19 is an example of a table for explaining the relationship between the inter-label distance (m) and the slow-down/pre-stop distance Z (m).
In the table, "n" is located in the row, indicating the number of defective labels 60. Y(m) and Z(m) are located in the column. The error correction coefficient a(%) in formula (1) is calculated using 0.2% and the minimum stopping distance b(m, b=15m).
(Explanation of the graph shown in FIG. 20)
FIG. 20 is an example of a graph of the table shown in FIG.

(Explanation of the graphs shown in FIG. 21 and FIG. 22)
21 and 22 are graphs illustrating the relationship between the inter-label distances X1-2, Y1-2 (m) and the error between the actual distance (m) at the time of stopping.
In the graph shown in Fig. 21, the diamond-shaped dots indicate the "conventional specifications." The conventional specifications are specifications for stopping defective labels 60 based on the distance from the winding top.
The square dots indicate a "new specification", that is, an embodiment of the present invention. The new specification is a specification for stopping defective labels 60 in the same front-end process 30 and based on the distance between adjacent defective labels 60.
The error between the actual distance when stopping under the new specifications is "2.8 m" on average per unit.
FIG. 22 is another example of a graph, in which the error from the actual distance when stopped is "13.7 m" on average per one.

(Explanation of development of sheet body 40 in each process shown in FIG. 1)
FIG. 1 is a development view of a sheet member 40 in each process.
In the figure, (a) is the SL process, (b) is the DL process, and (c) is the ST process. Raw web is wound up and removed in each process. The total amount of raw web removed in each process increases cumulatively as the process proceeds. Therefore, generally, the more the number of previous processes 30, the greater the total amount of raw web removed.

(Explanation of the graph shown in FIG. 23(a))
FIG. 23A is a graph for explaining an example of an error between SL and DL labels.
The SL-DL label error is affected by the removal of the original web by winding, and is distributed into "positive" and "negative" values.

(Explanation of the diagram shown in FIG. 23(b))
FIG. 23(b) is a diagram illustrating the average error and variance between SL and DL labels.
The number N is the number of defective labels 60, which is "10", the average error (m) is "1.5 m", and the variation (σ) is "23.6".
(Explanation of the development of the sheet body in the ST process shown in FIG. 24)
FIG. 24 is a development view of the sheet body in the ST process.
“X” indicates the positional relationship of the defective label 60 in the ST process, and “Y” indicates the positional relationship of the defective label 60 in the second pre-process 32 .

(Explanation of the diagram shown in FIG. 25)
FIG. 25 is a table for explaining the accuracy of the handover position information to the ST process.
The position information is as shown in FIG.
(1) Position information T1 is the distance from the winding point to the core.
(2) Position information X1 is the distance from the end of the roll to SL1 (midpoint) of the first sheet.
The defective label 60 marked with "SL" was applied in the ST process, in which the first original web winding and removal is carried out, as shown in FIG.
(3) Position information X1 is the distance from the end of the roll to SL2 (midpoint) of the second sheet.
(4) Position information X1-2 is the distance from the first SL1 to the second SL2 (each intermediate point).

(5) Position information Y1 is the distance from the end of the roll to DL1 (midpoint) of the first sheet.
The defective label 60 marked with "DL" was given in the DL process, in which the second original web winding and removal is carried out, as shown in FIG.
(6) Position information Y1 is the distance from the end of the roll to DL2 (midpoint) of the second sheet.
(7) Position information Y1-2 is the distance from the first DL1 to the second DL2 (each intermediate point).

(8) Position information Z1 is the distance from the end of the winding to DL1 of the first sheet (the end on the winding core side).
(9) Position information Z2 is the distance from the first sheet DL1 to the second sheet DL2 (each end on the core side).
(10) Position information Z3 is the distance from the second sheet DL2 to the third sheet DL3 (each end on the core side).
(11) Position information Z4 is the distance from the third sheet DL3 to the fourth sheet DL4 (each end on the core side).

(Explanation of the process of FIG. 26)
As shown in Fig. 26, the defective part removal method includes (1) a code reading step S10, (2) a slow-down/stop selection step S11, (3) a label-to-label distance calculation step S12, (4) a stop control step S13, (5) a slow-down control step S14, (6) a removal distance subtraction step S15, and (7) a slow-down/pre-stop distance calculation step S16. Note that (1) to (7) will be described below.
(Code reading process S10)
The code reading process S10 is a process in which, in the previous process 30, position information of the defective parts is converted into a barcode 51, the converted barcode 51 is displayed on a sorting card 50 and attached to the sheet body 40, and after the previous process 30 is completed, the barcode 51 displayed on the sorting card 50 is read in a process for removing the defective parts (e.g., the defective part removal process 20).
The code reading step S10 is specifically executed by a code decoding section 470 as shown in FIG.

(Slow down/stop selection process S11)
The slow-down/stop selection step S11 is a step in which the stop control step S13 or the slow-down control step S14 can be selected. The slow-down/stop selection step S11 is specifically executed by the slow-down/stop selection unit 440 as shown in FIG.
(Label distance calculation step S12)
The inter-label distance calculation step S12 is a step in which, of the defective labels 60 applied in the same previous step 30, the defective label 60 closest to the upper end of the sheet 40 is designated as the first label, the next closest defective label 60 is designated as the second label, and the distances between the first defective label SL1, DL1 and the second defective label SL2, DL2 are calculated as inter-label distances X1-2, Y1-2. Specifically, the inter-label distance calculation step S12 is executed by an inter-label distance calculation unit 410, as shown in FIG.

(Stop control process S13)
The stop control step S13 is a step of stopping the sheet 40 based on the inter-label distances X1-2, Y1-2 calculated in the inter-label distance calculation step S12. The stop control step S13 is specifically executed by the stop control unit 420 as shown in FIG.
(Slow-moving control process S14)
The slow-motion control step S14 is a step of slowly moving the sheet body 40 based on the inter-label distances X1-2, Y1-2 calculated in the inter-label distance calculation step S12. The slow-motion control step S14 is specifically executed by the slow-motion control unit 430, as shown in FIG.

(Removal distance subtraction step S15)
The removal distance subtraction step S15 is a step in which the position information of the defective part includes the removal distance of the defective part adjacent to the defective label 60, and the removal distance is subtracted from the inter-label distances X1-2, Y1-2 calculated in the inter-label distance calculation step S12. Specifically, the removal distance subtraction step S15 is executed by a removal distance subtraction unit 450, as shown in FIG.
(Distance calculation step S16 before slowing down and stopping)
The distance before slowing down/stopping calculation process S16 is a process S16 in which an error correction coefficient a (%) for the inter-label distance (m) and the minimum stopping distance b (m) of the sheet body 40 are set in advance, and a distance Z (m) before slowing down/stopping until the second and subsequent defective labels SL2, DL2 are slowed down/stopped is calculated using the following formula (1) based on the inter-label distances X1-2, Y1-2Y calculated in the inter-label distance calculation process S12.
Z = aY + b...Formula (1)
−10≦a≦10
0≦b≦99
The slow-down/pre-stop distance calculation step S16 is specifically executed by a slow-down/pre-stop distance calculation unit 460 as shown in FIG.

(Features and Effects of the Embodiments Based on the Present Invention)
The features of the embodiment according to the present invention are as follows.
(First characteristic point)
The first characteristic point is a method for removing defective parts of a sheet body 40 that can deal with defective parts caused by a plurality of previous processes, and the defective part removal method involves winding up a roll-shaped sheet body 40, temporarily stopping the winding just before each defective part based on position information of the defective parts in the sheet body 40 acquired in the previous process 30, and removing a portion of the sheet body 40 including the defective part from the sheet body 40, and there are a plurality of previous processes 30, and a second label detection method is performed to apply a defective label 60 to each defective part caused by each previous process 30, and to detect the defective label 60. the defective label 60 that is closest to the upper end of the sheet 40 among the defective labels 60 applied in the same previous process 30 is designated as the first defective label 60, the next closest defective label 60 is designated as the second defective label, and the distance between the first defective label SL1, DL1 and the second defective label SL2, DL2 is calculated as the inter-label distance X1-2, Y1-2; and a stop control process S13 that stops the sheet 40 based on the inter-label distance X1-2, Y1-2 calculated in the inter-label distance calculation process S12.

(Effect of the first characteristic point)
According to the first feature, the accuracy of the stop control of the sheet 40 can be improved by temporarily stopping the second and subsequent defective labels SL2, DL2 based on the distance between adjacent defective labels 60 in the same front-end process 30.
(Second characteristic point)
The second feature is a method for removing defective parts, which includes a slow-motion control process S14 for moving the sheet body 40 slowly based on the inter-label distances X1-2, Y1-2 calculated in the inter-label distance calculation process S12, and a slow-motion/stop selection process S11 which can select the stop control process S13 or the slow-motion control process S14.
(Effect of the second characteristic point)
According to the second feature, the stop control and the slow-motion control can be selected.

(Third characteristic point)
The third feature is a defective part removal method in which the position information of the defective part includes a removal distance of the defective part adjacent to the defective label 60, and a removal distance subtraction step is provided in which the removal distance is subtracted from the inter-label distances X1-2, Y1-2 calculated in the inter-label distance calculation step S12.
(Effect of the third characteristic point)
According to the third feature, by subtracting the removal distance from the inter-label distances X1-2, Y1-2, the positioning accuracy of the stop control and slow-motion control can be improved.

(Fourth characteristic point)
The fourth feature is a method for removing defective parts, which includes a step of calculating a distance before slowing down and stopping S16 in which an error correction coefficient a (%) for the inter-label distance (m) and a minimum stopping distance b (m) of the sheet body 40 are set in advance, and a step of calculating a distance before slowing down and stopping Z (m) until the second and subsequent defective labels SL2, DL2 are slowed down and stopped is calculated based on the inter-label distances X1-2, Y1-2Y calculated in the inter-label distance calculation step S12, using the following formula (1).
Z = aY + b...Formula (1)
−10≦a≦10
0≦b≦99
(Effect of the fourth characteristic point)
According to the fourth feature, by correcting the inter-label distances X1-2, Y1-2 using the error correction coefficient a and the minimum stopping distance b, the influence of measurement errors in, for example, an encoder (for example, the second conveying amount measuring unit 211B shown in Figure 4) in the previous process 30 can be reduced, and the positional accuracy of the stop control and slow-motion control can be improved.

(Fifth characteristic point)
The fifth feature is a method for removing defective parts, in which in a pre-process 30, position information of the defective parts is converted into a barcode 51, and the converted barcode 51 is displayed on an sorting card 50 and attached to a sheet body 40, and after completion of the pre-process 30, in a process for removing the defective parts (e.g., a defective part removal process 20), a code reading process S10 is provided in which the barcode 51 displayed on the sorting card 50 is read.
(Effect of the fifth characteristic point)
According to the fifth feature, by using the barcode 51, the defect position information transferred from the previous process 30 can be quickly and accurately captured in the process of removing the defect parts (for example, the defect part removing process 20).

(Sixth characteristic point)
A sixth feature is a winding device 100 that winds up a roll-shaped sheet body 40 and can temporarily stop winding before each defective part based on position information of the defective part in the sheet body 40 acquired in the previous process 30, there are a plurality of previous processes 30, a defective label 60 is attached to each defective part caused by each previous process 30, and while the sheet body 40 is temporarily stopped by the winding device 100, a part of the sheet body 40 including the defective part can be removed from the sheet body 40, and the winding device 100 has a function for detecting the defective label 60. the second label detection device 130 detecting the defective labels 60 that were applied in the same preceding process 30, the defective label 60 that is closest to the upper end of the sheet 40 being regarded as the first label, the next defective label 60 being regarded as the second label, and calculating the distance between the first defective label SL1, DL1 and the second defective label SL2, DL2 as the inter-label distances X1-2, Y1-2; and a stop control unit 420 that stops the sheet 40 based on the inter-label distances X1-2, Y1-2 calculated by the inter-label distance calculation unit 410.
(Effect of the sixth characteristic point)
According to the sixth feature, the accuracy of the stopping control of the sheet 40 can be improved by temporarily stopping the second and subsequent defective labels SL2, DL2 based on the distance between adjacent defective labels 60 in the same front-end process 30.

(Seventh characteristic point)
The seventh feature is the winding device 100, which is equipped with a slow-motion control unit 430 that causes the sheet body 40 to move slowly based on the inter-label distances X1-2, Y1-2 calculated by the inter-label distance calculation unit 410, and a slow-motion/stop selection unit 440 that can select either the stop control unit 420 or the slow-motion control unit 430.
(Effect of the Seventh Feature)
According to the seventh feature, the stop control and the slow-motion control can be selected.

(Eighth characteristic point)
The eighth feature is that the winding device 100 includes, in the position information of the defective portion, the removal distance of the defective portion adjacent to the defective label 60, and is equipped with a removal distance subtraction unit 450 that subtracts the removal distance from the inter-label distances X1-2, Y1-2 calculated by the inter-label distance calculation unit 410.
(Effect of the eighth characteristic point)
According to the eighth characteristic point, by subtracting the removal distance from the inter-label distances X1-2, Y1-2, it is possible to improve the positioning accuracy of the stop control and slow-motion control.

(Ninth characteristic point)
A ninth feature is the winding device 100, which is equipped with a third memory unit 400 that is capable of pre-setting and storing an error correction coefficient a (%) for the inter-label distance (m) and a minimum stopping distance b (m) of the sheet body 40, and a slow-down/pre-stop distance calculation unit that reads out the error correction coefficient a and the minimum stopping distance b of the sheet body 40 stored in the third memory unit 400, and calculates a slow-down/pre-stop distance Z (m) until the second and subsequent defective labels SL2, DL2 are slowed down and stopped, using the following formula (2), based on the inter-label distances X1-2, Y1-2Y calculated by the pre-stop distance calculation unit.
Z = aY + b...Formula (2)
−10≦a≦10
0≦b≦99

(Effect of the ninth characteristic point)
According to the ninth feature, by correcting the inter-label distances X1-2, Y1-2 using the error correction coefficient and the minimum stopping distance, it is possible to reduce the influence of measurement errors in, for example, an encoder (for example, the second conveying amount measuring unit 211B shown in Figure 4) in the previous process 30, and improve the positional accuracy of the stop control and slow-motion control.

10 Defective part removal system 20 Defective part removal process 30 Pre-process 31 First pre-process 32 Second pre-process 40 Sheet body 41 Original web 50 Sorting card 51 Barcode 60 Defective label SL1 First defective label SL2 Second defective label SL3 Third defective label SL4 Fourth defective label DL1 First defective label DL2 Second defective label 100 Winding device 110 Conveying path 120 Working position 130 Second label detection device 131 First sensor 132 Second sensor 140 Control device 150 Second conveying amount measuring section 160 Input section 170 Code reader 180 Slitter device 190 Display device 200 Printing device 210 Defect detection device 211A Image processing section 211Aa Imaging section 211Ab Defect detection unit 211B Second conveyance amount measurement unit 220 First labeler 230 First defect processing controller 240 First memory unit 250 First winder 300 Laminator 310 Defect detection device 320 Second labeler 330 Second defect processing controller 330A Reference label processing unit 340 Second memory unit 350 Second winder 360 First label detection device 400 Third memory unit 410 Label distance calculation unit 420 Stop control unit 430 Slow-down control unit 440 Slow-down/stop selection unit 450 Removal distance subtraction unit 460 Slow-down/pre-stop distance calculation unit 470 Code decoding unit S10 Code reading process S11 Slow-down/stop selection process S12 Label distance calculation process S13 Stop control step S14 Slow-down control step S15 Removal distance subtraction step S16 Slow-down/pre-stop distance calculation P1 Starting point of work position P2 Stop position P3 Slow-down start position L1 Predetermined distance T1 Acceleration period T2 Normal period T3 Rule period T4 Slow-down period T5 Deceleration period before slow-down T10 Deceleration period before stop X1-2 Distance between labels Y1-2 Distance between labels

Claims (9)

A method for removing defective parts, comprising the steps of: winding up a roll-shaped sheet body; temporarily suspending the winding just before each defective part based on position information of the defective part in the sheet body obtained in a previous process; and removing a portion of the sheet body including the defective part from the sheet body,
There are a plurality of pre-processes, and a defect label is attached to each defect portion caused by each pre-process,
a label detection device for detecting the defective label;
a label distance calculation step of determining, among the defective labels applied in the same previous step, the defective label closest to the upper end of the sheet as the first label, the next defective label closest to the upper end of the sheet as the second label, and calculating the distance between the first defective label and the second defective label as the label distance;
a stop control step of stopping the sheet body based on the inter-label distance calculated in the inter-label distance calculation step;
A method for removing defective portions from a sheet body capable of dealing with defective portions caused by a plurality of previous processes, comprising: a slow-motion control step of slowly moving the sheet body based on the label distance calculated in the label distance calculation step;
a slow-motion/stop selection process capable of selecting the stop control process or the slow-motion control process;
2. The method for removing defective parts from a sheet body capable of dealing with defective parts caused by a plurality of previous processes according to claim 1, further comprising: the position information of the defect portion includes a removal distance of the defect portion adjacent to the defect label,
3. The method for removing defective portions from a sheet body capable of dealing with defective portions caused by a plurality of previous processes, as described in claim 1 or claim 2, further comprising a removal distance subtraction step of subtracting the removal distance from the label distance calculated in the label distance calculation step. An error correction coefficient a (%) for the label distance Y (m) and a minimum stopping distance b (m) of the sheet body are set in advance,
A method for removing defective parts from a sheet body capable of accommodating defective parts caused by multiple previous processes, as described in claim 2, characterized in that it further comprises a step of calculating a distance before slowing down/stopping, which calculates a distance Z (m) before slowing down/stopping the second or subsequent defective labels, based on the label distance Y (m) calculated in the label distance calculation step, using the following formula (1):
Z = aY + b...Formula (1)
−10≦a≦10
0≦b≦99 In the pre-process, the position information of the defective portion is converted into a barcode, and the converted barcode is displayed on an arrangement card and attached to the sheet body;
A method for removing defective parts from a sheet body capable of dealing with defective parts caused by multiple previous processes, as described in any one of claims 1 to 4, characterized in that, after the previous process is completed, the process for removing the defective parts includes a code reading process for reading the barcode displayed on the sorting card. A winding device that winds up a roll-shaped sheet body and can temporarily stop winding before each defective portion based on position information of the defective portion of the sheet body obtained in a previous process,
There are a plurality of pre-processes, and a defect label is attached to each defect portion caused by each pre-process,
a portion of the sheet body including the defective portion can be removed from the sheet body while the sheet body is temporarily stopped by the winding device;
The winding device includes:
a label detection device for detecting the defective label;
a label distance calculation unit which, among the defective labels applied in the same preceding process, defines the defective label closest to the upper end of the sheet as the first label, defines the next defective label as the second label, and calculates the distance between the first defective label and the second defective label as the label distance;
a stop control unit that stops the sheet body based on the inter-label distance calculated by the inter-label distance calculation unit;
A winding device comprising: The winding device includes:
a slow-motion control unit that causes the sheet body to move slowly based on the label distance calculated by the label distance calculation unit;
A slow-motion/stop selection unit capable of selecting the stop control unit or the slow-motion control unit;
The winding device according to claim 6, further comprising: the position information of the defect portion includes a removal distance of the defect portion adjacent to the defect label,
The winding device includes:
The winding device according to claim 6 or 7, further comprising a removal distance subtraction unit that subtracts the removal distance from the inter-label distance calculated by the inter-label distance calculation unit. The winding device includes:
a storage unit capable of storing in advance an error correction coefficient a (%) for the label distance Y (m) and a minimum stopping distance b (m) of the sheet body;
a distance before slowing down and stopping calculation unit that reads out the error correction coefficient a and the minimum stopping distance b stored in the memory unit, and calculates a distance before slowing down and stopping Z (m) until the second and subsequent defective labels are slowed down and stopped based on the inter-label distance Y calculated by the distance before stopping calculation unit, using the following formula (2);
The winding device according to claim 7, further comprising:
Z = aY + b...Formula (2)
−10≦a≦10
0≦b≦99

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