JP2021138492A - Method of removing unacceptable point of sheet body, and winder - Google Patents

Abstract

To provide a method of removing an unacceptable point of a sheet body that allows for reducing the sped-reduction loss in an unacceptable point removing step while suppressing the labor and time of an operator.SOLUTION: A method of removing an unacceptable point, including winding up a roll-formed sheet body and removing a portion including an unacceptable point of the sheet body from the sheet body immediately before each unacceptable point by temporarily stopping winding-up at a position of the unacceptable point after decelerating the winding rate to a slow-rate operation, based on position information of the unacceptable point in the sheet body acquired in a preceding step, comprises a relative moving amount-calculating step that calculates a relative distance of from a position of an immediately before unacceptable point to a position of an unacceptable point next to stop based on position information of the unacceptable point next to stop and position information of an immediately-preceding unacceptable point precedent by one to the same, based on the position information of the unacceptable point, and a slow-rate start timing determining step that determines start timing of a slow-rate operation next to temporarily stop based on the relative distance calculated in the relative moving amount-calculating step.SELECTED DRAWING: Figure 6

Description

The present invention is a technique relating to a defective portion removing process in which a roll-shaped sheet body (hereinafter, also referred to as a raw fabric) is wound, winding is temporarily stopped at a defective portion, and the defective portion is removed from the original fabric. , The present invention relates to a technique for removing defective parts from a roll-shaped sheet body based on the defective part information acquired in the previous step.

The defective portion removing process for removing defective portions from a roll-shaped sheet body such as a raw film for packaging is performed using, for example, a machine called a slitter device. The slitter device executes a winding operation process of the roll-shaped sheet body, detects a defective portion in the sheet body during the winding, and suspends the winding operation process. During the temporary stop, the operator cuts the parts before and after the defective portion from the sheet body, removes the defective portion from the sheet body, and rejoins the sheet body at the cut position. When the rejoining process of the sheet body is completed, the winding process is restarted by the operation of the operator. By repeating this, a plurality of defective parts existing in the original fabric are removed.

Generally, in the pre-process of the defective portion removing step (slitter step) using the slitter device, a label (tape or the like) is attached to the defective position existing in the sheet body (see Patent Document 1), and the defective portion is attached. In the removal step, winding is stopped at a defective part based on the detection of the label. The pre-process is, for example, a printing process for printing on a sheet body, and defects are, for example, a printing error thereof or a defect in the sheet body itself.
Labeling to the position of the defective part (also called the defective position) is, for example, detecting defects such as printing defects by image processing or the like after winding the original fabric and before rewinding after the printing process is performed. It is executed by automatically attaching a label to the detected defective part.

In addition, in the previous process, the defective position information of the defective position to which the label is attached is also acquired. The position information of the defective portion is obtained by measuring the winding length of the rewinding to each defective position with a measuring unit (encoder or the like) as in Patent Document 1. In this way, the defective position of each defective portion is defined by the winding length from the measurement start on the winding core side of the roll winding to the defective position.
In Patent Document 1, each defective position information acquired in the previous process is converted into a length up to each defective position based on the position on the winding start side (outside of winding) in the original fabric in the defective portion removing process. Then, according to each defective position information after conversion, the winding is rewound by the amount corresponding to the winding amount from the start of winding to each defective position, and each time the corresponding label is confirmed, the winding is stopped and the winding is stopped. During this time, the worker was performing the removal process and the rejoining process of the defective part.

Japanese Unexamined Patent Publication No. 3-45345

As described above, in the defective portion removing step, the position of the defective portion is detected based on the label given to the sheet body during the winding of the original fabric, and the winding is stopped.
Here, the operation of winding the raw fabric in the slitter device is executed by high-speed rotary operation from the viewpoint of work efficiency. Therefore, in order to reliably stop winding at the next defective position (label position), the winding speed at high speed is reduced before the defective position and switched to slow operation, and during the slow operation, By checking the label, it is possible to reliably stop winding at a defective location.

At this time, if the reference position for winding start deviates, the accuracy of each defective position information deteriorates. Therefore, in Patent Document 1, the winding quantity (defective) from the reference position set on the outer winding side of the original fabric to each defective portion. By sequentially estimating the position of the defective part using the length to the position), it is possible to pause at the defective part.
Here, when the winding is stopped at a position detected as a defective portion in the previous step, the operator cuts the front and rear including the defective portion with a cutter of the slitter device and executes the rejoining process. Due to the defective portion removing process, an error is included in the defective position information acquired in the previous step with respect to the position of the defective portion thereafter, and the error accumulates as the defective portion removing process is repeated. That is, the cumulative error increases as the number of removals for removing defective parts increases.

Therefore, in order to prevent the detection omission of the defective part (passing through the defective position) due to the omission of label detection, in the past, the operation was switched to the slow-moving operation from, for example, 100 m before the next stop position scheduled based on the defective position information. Then, there is a problem that the longer the period of this slow-moving operation is, the longer the time required for the processing of the defective portion removing step is.
Further, for example, the slow-moving operation is switched from 100 m before, but in the conventional case, in order to reduce the speed reduction loss due to the slow-moving operation, the operator visually monitors the sheet body and the label to be transported to perform the slow-moving operation. It is also practiced to manually and temporarily increase the time transport speed as appropriate. However, the fact that the worker visually monitors and works on the sheet body as large as 100 m leads to an increase in the burden on the worker.

Since the present invention has been made by paying attention to the above points, it is an object of the present invention to reduce the speed reduction loss in the defective portion removing step while suppressing the load on the operator.

In order to solve the problem, in one aspect of the present invention, the roll-shaped sheet body is wound up, and based on the position information of the defective portion in the sheet body acquired in the previous step, the winding is performed before each defective portion. This is a method for removing defective parts, which is a method of removing the defective part of the sheet body including the defective part from the sheet body by temporarily stopping the winding at the position of the defective part after decelerating the speed and driving slowly. Based on the position information of the defective part that stops next, and the position information of the defective part immediately before that, and the position of the defective part that stops next from the position of the defective part immediately before. A relative movement amount calculation process for calculating the relative distance to The gist is to prepare.

Further, in the embodiment of the present invention, a roll-shaped sheet body having a label attached to a defective portion is wound, winding is temporarily stopped at the defective portion, and a portion including the defective portion is removed from the sheet body. A take-up device that reduces the take-up speed based on the position information of the defective part acquired in the previous process to change to a slow-moving operation, and then temporarily stops the take-up at the position of the defective part. In the above, based on the position information of the defective part, the position information of the defective part to be stopped next, and the position information of the defective part immediately before the one, and then stop from the position of the defective part immediately before the above. Based on the relative movement amount calculation unit that calculates the relative distance to the position of the defective part and the relative distance calculated by the relative movement amount calculation unit, the slow-moving start that determines the start timing of the slow-moving operation for the next pause. The gist is to have a timing determination unit.

According to the aspect of the present invention, the amount of movement from the immediately preceding stop position to the next stop position is estimated at a relative position between adjacent defective parts along the transport direction. As a result, according to the aspect of the present invention, the accumulation of errors in the position information of the defective portion due to the removal of the defective portion is prevented. Therefore, according to the aspect of the present invention, the accuracy of the distance information to the position of the next defective portion is improved as compared with the conventional case, so that the distance of the slow driving before stopping can be shortened.
As a result, according to the aspect of the present invention, the speed reduction loss is suppressed and the efficiency of the defective portion removing work is improved.

It is a figure explaining the process which concerns on embodiment based on this invention. It is a schematic diagram explaining the printing process which concerns on embodiment based on this invention. It is a figure explaining the structure of the defect detection apparatus which concerns on embodiment based on this invention. It is a schematic diagram explaining the laminating process which concerns on embodiment based on this invention. It is a schematic diagram explaining the slitter process which concerns on embodiment based on this invention. It is a figure explaining the structure of the rotary operation control part which concerns on embodiment based on this invention. It is a developed view which shows the relationship of the label of the sheet body which concerns on embodiment based on this invention. It is a figure which shows the transition of rotation control. It is a development view which shows the relationship of the label in the sheet body of the comparative example.

Next, an embodiment of the present invention will be described with reference to the drawings.
In the present embodiment, as shown in FIG. 1, each process of the printing step 1, the laminating step 2, and the defective portion removing step 3 is executed in this order on the raw fabric in which a long sheet body is rolled. This will be described by taking the case of doing so as an example. In this example, the printing step 1 and the laminating step 2 are the pre-steps of the defective portion removing step 3.

(Printing process 1)
In the printing step 1, as shown in FIG. 2, the roll-shaped sheet body 4 is wound up, the sheet body 50 being conveyed is continuously printed by the printing device 10, and the printed sheet body 50 is printed. The process of winding the roll-shaped original fabric 5 with the winder 15 is executed again.

<About defective position information and labeling processing>
In the printing step 1, a defect detecting device 11, a labeler 12, and a defect processing controller 13 are provided between the printing device 10 and the winder 15 along the transport path of the sheet body 50.
The defect detection device 11, the labeler 12, and the defect processing controller 13 continuously execute defect detection processing on the wound sheet body 50, assign a label to the position of the detected defective portion, and indicate the defect. A process of obtaining defective position information of a location and storing it in the storage unit 14 is executed. As shown in FIG. 7, the labels LVL and LVL1 are attached so as to project outward from the width direction of the sheet body 5. In the present embodiment, in order to obtain the defective position information of the defective portion labeled in the printing process 1 again in the laminating step 2, a process of obtaining the defective position information of the defective portion and storing it in the storage unit 14 is performed. You don't have to do it.
The following process is an example thereof, and the present invention is not limited to this process. For example, the transport amount measurement process may be composed of a defect detection device 11 and another measurement device.

<Defective detection device 11>
As shown in FIG. 3, the defect detection device 11 includes an image processing unit 11A and a transport amount measuring unit 11B for measuring the transport amount of the sheet body 50.
<Image processing unit 11A>
The image processing unit 11A executes image processing on the image captured by the imaging unit 11Aa and the imaging unit 11Aa that images the surface of the conveyed sheet body 50 at a predetermined sampling cycle, and checks whether there is a defect in the captured image. It is provided with a defect detection unit 11Ab that determines whether or not the image processing is performed. The defect detection unit 11Ab outputs the detected defect detection signal to the defect processing controller 13.
<Transportation amount measurement unit 11B>
The conveyed amount measuring unit 11B measures the length of the conveyed sheet body at a predetermined sampling cycle, and outputs the measurement information to the defect processing controller 13.

<Defective controller 13>
The defect processing controller 13 outputs the defect position information, which is information from the measurement start position to the defect position, to the storage unit 14 based on the measurement information from the transport amount measurement unit 11B and the defect detection signal from the image processing unit 11A. At the same time, tracking of each defective position is executed to supply a labeling signal to the labeler 12 in synchronization with each defective position reaching the labeler 12.
<Labeler 12>
When the labeler 12 inputs the label assignment signal from the defect processing controller 13, the labeler 12 executes a process of attaching a label to one end side in the width direction of the sheet body.

(Lami process 2)
In the laminating step 2, as shown in FIG. 4, the roll-shaped sheet body 5 that has been subjected to the printing process is wound up, and the sheet body 50 that has been rewound and is being conveyed is continuously laminated by the laminating device 20. The material laminating process is executed, and the sheet body 50 after the laminating process is wound up by the winding machine 25 to form a roll-shaped original fabric 6 again.

<About defective position information and labeling processing>
In the laminating process 2, as in the printing process 1, the defect detecting device 21, the labeler 22, and the defect processing controller 23 are provided between the laminating device 20 and the winder 25 along the transport path of the sheet body 50. Is provided, a label is given to a defective portion such as a laminating defect, and defective position information including a length from a measurement start position to a defective portion is calculated and sequentially stored in the storage unit 14.
The configuration of the defect detection device 21, the labeler 22, and the defect processing controller 23 in the laminating process 2 is the same as the configuration provided in the printing process 1.

However, the defect detection device 21 also detects the label attached in the printing process 1. When the defect detection device 21 does not detect the label, the label detection device 26 detects the label attached in the printing step 1. The label detection device 26 is arranged between the defect detection device 21 and the labeler 22.
Further, the defect processing controller 23 also executes a process of recalculating the defect position information of the label detected by the defect detection device 21 or the label detection device 26 and updating the information of the storage unit 14.

<Reference label processing unit 23A>
Further, the defect detection device 21 includes a reference label processing unit 23A.
The reference label processing unit 23A assigns a reference label, which is a label for ending measurement and a label for removing defects, to the winding outer side (winding outer side) of the sheet body 50, and also assigns a label of the reference label. The position information of the position is output to the storage unit 14.

(Position information conversion unit 35Ba)
The position information conversion unit 35Ba is provided by, for example, the relative movement amount calculation unit 35B described later. The position information conversion unit 35Ba may be included in the reference label processing unit 23A.
The position information conversion unit 35Ba executes a process of converting the position information of the label into a transport amount with the reference label as a reference (the reference label position is set to zero).
Then, the raw fabric 6 after the laminating step 2 becomes the raw fabric to be processed in the defective portion removing step 3.
As a result, the position information of the reference label and the position information of the defective portion (defective position information) stored in the storage unit 14 are all values based on the reference label position on the outer side of the winding.

Further, in the present embodiment, the case where the previous process is composed of two steps and each step detects a defect and assigns a label is illustrated, but the defect detection and the defect detection and the label are given only in the process immediately before the defective portion removing step 3. It may be configured to perform the labeling process.
In FIG. 7, LVL1 corresponds to the reference label.
The reference label and the label indicating the defective position may be the same label or different labels (for example, labels having different colors).

(Defective part removal step 3)
The defective portion removing step 3 is executed by the winding device. Examples of the winding device include a slitter device and a rewinder device (rewinding machine). When the winding device of the present embodiment is a rewinder device, it has a slitter process as a post-process.
As shown in FIG. 5, the defective portion removing step 3 includes a rewinding machine 31, a winding machine 32, a transport amount detecting device 34, a label detecting device 33, and a rotary operation control unit 35.

<Rewinding machine 31 and winding machine 32>
The rewinding machine 31 and the winding machine 32 are synchronously executed to rotate and stop in response to a drive command from the rotation operation control unit 35.
<Label detection device 33>
The label detection device 33 is provided in the transport path between the rewinding machine 31 and the winding machine 32, and when it detects a label attached to the sheet body 50, it supplies a label detection signal to the rotation operation control unit 35.
<Transport amount detection device 34>
The transport amount detecting device 34 is composed of a yard meter or the like, and obtains a transport amount signal of the sheet body 50 rewound by the rewinding machine 31.

<Rotation operation control unit 35>
As shown in FIG. 6, the rotary operation control unit 35 includes a transport amount calculation unit 35A, a relative movement amount calculation unit 35B, a slow-moving start timing determination unit 35C, and a take-up control unit 35D.
<Transport amount calculation unit 35A>
When the transport amount calculation unit 35A detects a reference label which is the first label (the label located on the outermost winding side) from the start of winding based on the label detection signal from the label detection device 33, the position is determined. As the measurement start position (zero reset), the transport amount is obtained based on the transport amount signal from the transport amount detection device 34. The transport amount calculation unit 35A also serves as a process of the start position determination unit. The transport amount is based on, for example, the position of the label detection device 33. Further, the transport amount calculation unit 35A detects the label at the defective portion position after the reference label, and when the winding is temporarily stopped, the transport amount is reduced to zero. After resetting, the transport amount after the start of winding is calculated based on the transport amount signal from the transport amount detection device 34.

<Relative movement amount calculation unit 35B>
The relative movement amount calculation unit 35B constitutes a relative movement amount calculation step.
The relative movement amount calculation unit 35B is based on the position information of the defective part to be stopped next in the position information of the defective part and the position information of the immediately preceding defective part which is the position information immediately before the previous one. Calculate the relative distance from the position of the defective part to the position of the defective part that stops next.
However, in the relative movement amount calculation step, based on the position information of the reference label (start label), the relative distance to the defective portion that stops first is calculated as the relative distance from the reference label attachment position.
In the relative movement amount calculation unit 35B of the present embodiment, a plurality of defective position information stored in the storage unit 14 is sorted in advance using the amount transported from the reference label as a key, and then the data are arranged in ascending order. The difference in the amount of transportation between adjacent defective position information is obtained in advance as the amount of relative movement. The smallest defective position information value is the relative movement amount.

<Driving start timing determination unit 35C>
The slow-moving start timing determination unit 35C constitutes the slow-moving start timing determination unit 35C.
The slow-moving start timing determination unit 35C then executes a process of determining the start timing of the slow-moving operation for a temporary stop based on the relative distance calculated by the relative movement amount calculation unit 35B.
In the slow-moving start timing determination unit 35C of the present embodiment, for example, the value obtained by subtracting the preset margin distance from the relative distance from the previous defective position to the next defective position calculated by the relative movement amount calculation step is used as the previous value. Calculated as the amount of movement from the temporary stop to the start of slow driving.

<Take-up control unit 35D>
In the take-up control unit 35D, the take-up operation is carried out at a timing when the carry amount becomes the movement amount calculated by the slow-moving start timing determination unit 35C until the start of the slow-moving operation based on the carry-in amount calculated by the carry-on amount calculation unit 35A. A signal for controlling the rotation of the winder and the rewinder is supplied to the winder and the rewinder so as to switch to. The winder and the rewinder are rotationally driven and controlled according to the supplied signal.

As a result, as shown in FIG. 8, the rotation operation process at high speed is executed until the slow-moving start timing is reached. The rotation operation process at high speed rotation includes a rotation acceleration transition period in which the rotation speed is increased to a preset high speed rotation, a high speed steady rotation period in high speed rotation, and a deceleration transition in which deceleration is performed from high speed rotation to slow rotation operation. It consists of a period.
Further, when the winding control unit 35D inputs a signal from the label detection device 33, the winding control unit 35D supplies a stop signal to the winding machine and the rewinding machine.
Further, when the winding control unit 35D inputs an operation command manually operated by the operator, the winding control unit 35D supplies a signal indicating the rotation speed of the input operation command to the rewinding machine 31 and the winding machine 32.

(Operation and others)
In the pre-process of the defective part removing step 3, a label is given to the defective part in the original fabric, and up to each defective part based on the reference label given to the outer surface of the original fabric to be processed in the defective part removing step 3. Acquire defective position information. Here, the defective position information is sorted in ascending order according to the distance from the reference position. FIG. 7 shows an example in which the original fabric is developed. LVL1 is a reference label, and LVL is a label given to a defective portion.
Then, in the defective portion removing step 3, the winding device reliably detects each label, and the winding operation can be reliably stopped at the defective portion, based on the defective position information of each defective portion. As shown in 8, the winding speed is reduced before the label position to rotate in a slow-moving operation. In FIG. 8, V1 indicates the period of slow driving and V0 indicates the normal high speed rotation period including the transition period.

At this time, if the defective portion is stopped at the defective portion detected in the previous step in the defective portion removing step 3, the operator cuts the sheet body 50 in the range before and after including the defective portion and rejoins the sheet body 50 during the stop. To execute. Therefore, every time the defective portion is removed, an error is accumulated in the defective position information Z1 to Z10 of each defective portion located on the winding core side, and the accuracy deteriorates (see FIG. 9). For this reason, conventionally, the length for driving slowly before the label position has been set as long as 100 m, for example.

On the other hand, in the present embodiment, as shown in FIG. 7, based on the relative distances Y1 to Y10 to the defective position information of the next defective portion with respect to the defective position information of the immediately preceding defective portion, the vehicle is then slowed down for a temporary stop. Determine the start timing of operation. Here, "based on the relative distance" means that, for example, the start timing of the slow-moving operation is set by the time with reference to the transport speed.
Therefore, in the present embodiment, the error is not accumulated due to the removal of the defective portion, and it is possible to suppress the error of any defective portion (label position) by the error caused by the removal of the immediately preceding defective portion. Become. As a result, it is possible to shorten the slow driving in front of the label position.
Thereby, in the present embodiment, it is possible to shorten the working time of the defective portion removing step 3.
In addition, the monitoring time of the operator during the slow-moving operation for stopping at the label position is short, and since it is not necessary to manually adjust the transport speed, the mental burden on the operator can be reduced.

(effect)
In this embodiment, the following effects are obtained.
(1) In the present embodiment, the roll-shaped sheet body is wound up, and based on the position information of the defective portion in the sheet body acquired in the previous step, the winding speed is reduced in front of each defective portion to drive slowly. This is a method of removing a defective portion from the sheet body by temporarily stopping the winding at the position of the defective portion and removing the portion of the sheet body including the defective portion from the sheet body, based on the position information of the defective portion. Based on the position information of the defective part that stops next and the position information of the defective part immediately before that, the relative distance from the position of the defective part immediately before the above to the position of the defective part immediately before the next stop is calculated. A step of calculating the relative movement amount to be performed and a step of determining the slow-moving start timing for determining the start timing of the slow-moving operation for the temporary stop are provided based on the relative distance calculated by the relative movement amount calculation step.

For example, the apparatus of the present embodiment winds a roll-shaped sheet body with a label attached to a defective portion, suspends winding at the defective portion, and removes the portion including the defective portion from the sheet body. In the winding device, the winding speed is reduced based on the position information of the defective part acquired in the previous step to change to the slow-moving operation, and then the winding is temporarily stopped at the position of the defective part. In the device, based on the position information of the defective part immediately before, based on the position information of the defective part to be stopped next and the position information of the defective part immediately before the one, from the position of the defective part immediately before the above to the next. Based on the relative movement amount calculation unit 35B that calculates the relative distance to the position of the defective part to stop and the relative distance calculated by the relative movement amount calculation unit 35B, the start timing of the slow driving for the temporary stop is determined next. A slow-moving start timing determination unit 35C is provided.

According to this configuration, the defective portion is removed by estimating the amount of movement from the immediately preceding stop position to the next stop position at the relative position between the defective portions adjacent to each other along the transport direction. Accumulation of errors in location information is prevented. Therefore, according to the present embodiment, the accuracy of the distance information to the position of the next defective portion is improved as compared with the conventional case, so that the distance of the slow driving before the stop can be shortened. As a result, according to the aspect of the present invention, the speed reduction loss is suppressed and the efficiency of the defective portion removing work is improved.

(2) In the present embodiment, a reference label is attached in advance to the outer winding surface of the roll-shaped sheet body regardless of the presence or absence of defects, and the relative movement amount calculation step is one from the position of the reference label. The relative distance to the position of the defective portion that stops first is calculated as the relative distance from the assigned position of the reference label.
For example, as an apparatus configuration, the roll-shaped sheet body is provided with a reference label in advance on the outside of the winding regardless of the presence or absence of defects, and when the reference label is detected, the detection position is set as the winding start position. The relative movement amount calculation unit 35B includes a determination unit, and the relative movement amount calculation unit 35B calculates the relative distance to the defective portion that stops first as the relative distance from the reference label.
According to this configuration, even if the sheet body on the outer side of the winding is appropriately removed, the accuracy of the distance to the first label is prevented from deteriorating.

(3) In the present embodiment, the roll-shaped sheet body is given a label at each defective portion, and by detecting the label, the winding can be automatically stopped.
For example, the apparatus is configured to have a label detecting device for detecting the label and a winding control unit 35D for temporarily stopping the winding based on the label detection by the label detecting device.
According to this configuration, winding can be automatically stopped by detecting the label.

(4) In the present embodiment, the slow-moving start timing determination step determines the relative movement until the start of the next slow-moving operation based on a value obtained by subtracting a preset margin distance from the relative distance calculated by the relative movement amount calculation step. do.
For example, the slow-moving start timing determination unit 35C determines the relative movement amount until the start of the next slow-moving operation based on a value obtained by subtracting a preset margin distance from the relative distance calculated by the relative movement amount calculation step. And.
With this configuration, winding can be reliably stopped automatically at the label position.
The preset margin distance is selected from, for example, a range of 40 m to 5 m.

1 Printing process 2 Lami process 3 Defect removal process 10 Printing device 11 Defect detection device 11A Image processing unit 11Aa Imaging unit 11Ab Defect detection unit 11B Transport amount measurement unit 12 Labeler 13 Defect processing controller 14 Storage unit 20 Laminating device 21 Defect detection device 22 Labeler 23 Defect processing controller 13A Reference label processing unit 31 Rewinding machine 32 Rewinding machine 33 Label detection device 34 Transport amount detection device 35 Rotational operation control unit 35A Transport amount calculation unit 35B Relative movement amount calculation unit 35Ba Position information conversion unit 35C Slow start timing determination unit 35D Winding control unit 50 Sheet body Y1 to Y10 Relative distance LVL Defective position label LVL1 Reference label

Claims (8)

The roll-shaped sheet body is wound up, and based on the position information of the defective part in the sheet body acquired in the previous process, the winding speed is reduced to slow-moving operation before each defective part, and then at the position of the defective part. It is a method of removing defective parts by temporarily stopping the winding and removing the portion of the sheet body including the defective parts from the sheet body.
Based on the position information of the defective part that stops next, and based on the position information of the defective part immediately before that and the position information of the defective part immediately before that, the defect that stops next from the position of the defective part immediately before. Relative movement amount calculation process that calculates the relative distance to the position of the location,
Based on the relative distance calculated by the relative movement amount calculation step, the slow-moving start timing determination step of determining the start timing of the slow-moving operation for pausing is followed.
A method for removing defective parts of a sheet body, which comprises. A reference label is attached to the outside of the roll-shaped sheet in advance regardless of the presence or absence of defects.
The claim characterized in that the relative movement amount calculation step calculates the relative distance from the position of the reference label to the position of the defective portion that stops first as the relative distance from the given position of the reference label. Item 2. The method for removing defective parts of a sheet body according to Item 1. The roll-shaped sheet has a label attached to each defective portion, and by detecting the label, the winding can be automatically stopped. 2. The method for removing defective parts of a sheet body according to 2. The slow-moving start timing determination step is characterized in that the relative movement amount until the start of the next slow-moving operation is determined based on a value obtained by subtracting a preset margin distance from the relative distance calculated by the relative movement amount calculation step. The method for removing a defective portion of a sheet body according to any one of claims 1 to 3. A winding device for winding a roll-shaped sheet body with a label attached to a defective portion, suspending winding at the defective portion, and removing the portion including the defective portion from the sheet body, which is a pre-process. In the winding device that temporarily stops the winding at the position of the defective part after decelerating the winding speed and changing to the slow-moving operation based on the position information of the defective part acquired in
Based on the position information of the defective part that stops next, and based on the position information of the defective part immediately before that and the position information of the defective part immediately before that, the defect that stops next from the position of the defective part immediately before. Relative movement amount calculation unit that calculates the relative distance to the position of the location,
Based on the relative distance calculated by the relative movement amount calculation unit, the slow-moving start timing determination unit that then determines the start timing of the slow-moving operation for a temporary stop,
A winding device characterized by being provided with. The roll-shaped sheet body has a reference label attached to the outside of the roll in advance regardless of the presence or absence of defects.
A start position determination unit that sets the detected position as the measurement start position when the above reference label is detected is provided.
The winding device according to claim 5, wherein the relative movement amount calculation unit calculates the relative distance to the defective portion that stops first as the relative distance from the reference label. It has a label detection device that detects the above labels,
The winding device according to claim 5 or 6, further comprising a winding control unit that suspends winding based on label detection by the label detecting device. The claim for determining the slow-moving start timing is based on a value obtained by subtracting a preset margin distance from the relative distance calculated by the relative movement amount calculation unit to determine the relative movement until the start of the next slow-moving operation. Item 5. The winding device according to any one of claims 5 to 7.

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