JP5939166B2 - 皺 Detection device - Google Patents

Description

  The present invention relates to a wrinkle detection device that detects the occurrence of wrinkles.

  Patent Document 1 discloses an apparatus for detecting the occurrence of wrinkles on sheet-like paper. In the apparatus described in Patent Document 1, generation of wrinkles is detected by applying light to paper.

Japanese Patent Laid-Open No. 62-249850

  Paper such as fine paper is produced by a paper machine and formed into a product by a finishing machine. The paper produced by the paper machine is wound up into a roll. In addition, paper manufactured by a paper machine has a large width, for example, a paper whose width is 10 m. For this reason, in the finishing machine, the paper produced by the paper machine is rewound and cut to a desired width in the middle.

  Wrinkles may occur when the paper is rolled up. Conventionally, the occurrence of wrinkles has been detected by photographing paper with a camera or applying light to the paper as in the apparatus described in Patent Document 1. However, with such a method, it has been difficult to detect wrinkles over the entire width of the paper. In addition, there is a problem in that the detection accuracy is reduced in an environment where paper dust flies.

  The present invention has been made to solve the above-described problems. An object of the present invention is to provide a wrinkle detection device that can accurately detect wrinkles generated when winding paper.

The wrinkle detection device according to the present invention detects a rotating body that rotates while bringing the outer peripheral surface into contact with paper that is wound in a roll shape, a driving device that controls the rotation of the rotating body, and a load current of the driving device. a load current detector, when the current value detected by the load current detector is larger than the set current value, comparing the current value with the set current value detected by the load current detector when the set time has elapsed, the load a judging unit for detecting that the wrinkles occur in the paper when the current value detected by the current detector is again greater than the set current value, Ru comprising a. The set current value is a threshold value for determining whether or not there is an abnormality when winding the paper.

In addition, the wrinkle detection device according to the present invention controls the first rotating body and the second rotating body that rotate while bringing the outer peripheral surface into contact with the paper wound in a roll shape, and the first rotating body that controls the rotation of the first rotating body. 1 drive device, 2nd drive device which controls rotation of the 2nd rotating body, 1st load current detector which detects load current of the 1st drive device, and 2nd which detects load current of the 2nd drive device a load current detector, is greater than current value is set current value detected by the first load current detector, a current value and set current value detected by the second load current detector when the set time has elapsed comparison, a determination unit for detecting that the wrinkles on the paper occurs when the current value detected by the second load current detector is larger than the set current value, Ru comprising a. The set current value is a threshold value for determining whether or not there is an abnormality when winding the paper.

In addition, the wrinkle detection device according to the present invention includes a first rotating body, a second rotating body, a third rotating body, and a first rotating body that rotate while bringing the outer peripheral surface into contact with the paper wound in a roll shape. A first drive device that controls rotation, a second drive device that controls rotation of the second rotator, a third drive device that controls rotation of the third rotator, and a load current of the first drive device is detected. A first load current detector; a second load current detector for detecting a load current of the second drive device; a third load current detector for detecting a load current of the third drive device; and a first load current detector. current value is detected by comparing the current value with the set current value detected by the second load current detector when the first set time has elapsed is greater than the set current value by the second load current detector The second set time when the detected current value is greater than the set current value Compared elapsed the current value detected by the third load current detector when the set current value, wrinkles on the paper occurs when the current value detected is larger than the set current value by the third load current detector a determiner for detecting that, Ru comprising a. The set current value is a threshold value for determining whether or not there is an abnormality when winding the paper.

  With the wrinkle detection device according to the present invention, wrinkles generated when winding paper can be accurately detected.

It is a figure which shows the structure of the wrinkle detection apparatus in Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the wrinkle detection apparatus in Embodiment 1 of this invention. It is a figure for demonstrating the function of the wrinkle detection apparatus in Embodiment 1 of this invention. It is a figure which shows the structure of the wrinkle detection apparatus in Embodiment 2 of this invention. It is a flowchart which shows operation | movement of the wrinkle detection apparatus in Embodiment 2 of this invention. It is a figure for demonstrating the function of the wrinkle detection apparatus in Embodiment 2 of this invention. It is a figure which shows the structure of the wrinkle detection apparatus in Embodiment 3 of this invention. It is a flowchart which shows operation | movement of the wrinkle detection apparatus in Embodiment 3 of this invention. It is a figure for demonstrating the function of the wrinkle detection apparatus in Embodiment 3 of this invention.

  The present invention will be described in detail with reference to the accompanying drawings. In each figure, the same or corresponding parts are denoted by the same reference numerals. The overlapping description will be simplified or omitted as appropriate.

Embodiment 1 FIG.
Paper such as fine paper is produced by a paper machine and formed into a product by a finishing machine. FIG. 1 is a diagram showing a configuration of a finishing machine. The main bag detecting device is provided in a finishing machine as shown in FIG. The finishing machine includes, for example, an unwinder 1, a paper roll 2, a cutting machine 3, a winder 4, and a detection device 5.

  The roll paper 6 is manufactured by a paper machine. The roll paper 6 is made of paper wound in a roll shape. The roll paper 6 is large and has a width of 10 m, for example. The roll paper 6 is set in the unwinder 1. The unwinder 1 is a device for rotating the set roll paper 6 to feed out the paper. The unwinder 1 includes an electric motor 7 and a drive device 8. The electric motor 7 generates a driving force for rotating the roll paper 6 set in the unwinder 1. The driving device 8 controls the electric motor 7 to rotate and stop the roll paper 6.

  The paper roll 2 is a roll for guiding the paper fed out from the unwinder 1 (specifically, the roll paper 6 set in the unwinder 1). The paper fed from the unwinder 1 is turned by the paper roll 2 and reaches the winder 4. A plurality of paper rolls 2 are installed as necessary.

  The cutting machine 3 is a device for cutting the paper fed from the unwinder 1. The cutting machine 3 includes a slitter 9, an electric motor 10, and a drive device 11. The paper fed from the unwinder 1 is cut along the direction of travel by the slitter 9. The electric motor 10 generates a driving force for rotating the slitter 9. The drive device 11 controls the electric motor 10 to rotate and stop the slitter 9.

  The winder 4 is a device for winding the paper cut by the cutting machine 3. The paper fed from the unwinder 1 is cut by the cutting machine 3 and then wound around the paper tube 12 by the winder 4. The winder 4 includes, for example, a rear drum 13, a front drum 14, a rider roll 15, electric motors 16 and 17, and driving devices 18 and 19.

  The rear drum 13, the front drum 14, and the rider roll 15 are composed of a rotating body for winding the paper around the paper tube 12 in a roll shape. The rear drum 13, the front drum 14, and the rider roll 15 have a cylindrical shape or a columnar shape longer than the paper tube 12. The rear drum 13, the front drum 14, and the rider roll 15 rotate while bringing the outer peripheral surface into contact with the paper tube 12 at the beginning of winding the paper, and thereafter rotating the outer peripheral surface into contact with the paper wound around the paper tube 12. By rotating the rear drum 13, the front drum 14, and the rider roll 15, the paper tube 12 rotates and the paper is wound around the paper tube 12.

  The paper cut by the cutting machine 3 is wound around the rear drum 13 so as to pass under the rear drum 13 and between the rear drum 13 and the front drum 14. Thereafter, the paper leaves the rear drum 13 and is wound around the paper tube 12. The rear drum 13 and the front drum 14 are disposed below the paper tube 12 and contact the paper wound around the paper tube 12 from below. The electric motor 16 generates a driving force for rotating the rear drum 13. The driving device 18 controls the electric motor 16 to rotate and stop the rear drum 13. Further, the electric motor 17 generates a driving force for rotating the front drum 14. The drive device 19 controls the electric motor 17 to rotate and stop the front drum 14.

  The rider roll 15 contacts the paper wound around the paper tube 12 from above. The rider roll 15 moves upward according to the overall diameter of the paper wound around the paper tube 12.

  The detection device 5 is a device for detecting the occurrence of wrinkles on the paper wound around the paper tube 12. The detection device 5 includes a load current detector 20 and a determiner 21. The load current detector 20 detects the load current of the driving device 18. The determiner 21 determines whether or not wrinkles have occurred on the paper wound around the paper tube 12 based on the load current value (detected current value) detected by the load current detector 20.

  Hereinafter, the function and operation of the bag detection apparatus will be specifically described with reference to FIGS. 2 and 3 as well. FIG. 2 is a flowchart showing the operation of the wrinkle detection apparatus according to Embodiment 1 of the present invention. FIG. 3 is a diagram for explaining the function of the eyelid detection device according to the first embodiment of the present invention.

  In the finishing machine, first, the roll paper 6 manufactured by the paper machine is set in the unwinder 1. The paper is fed out from the roll paper 6 set in the unwinder 1 and wound around the paper rolls 2 and the rear drum 13 of the winder 4. The leading end of the paper fed from the unwinder 1 is fixed to the paper tube 12.

  When the leading end portion of the paper is fixed to the paper tube 12, the roll paper 6, the slitter 9, the rear drum 13, and the front drum 14 start to rotate. As a result, the paper is sequentially delivered from the unwinder 1, and is wound around the paper tube 12 after being cut by the cutting machine 3.

  When the rear drum 13 is driven by the electric motor 16, the load current detector 20 detects the load current of the driving device 18 (S101). The detection of the load current by the load current detector 20 is performed at an extremely short period thereafter. The determiner 21 compares the current value (detected current value) detected by the load current detector 20 with the set current value (S102).

  FIG. 3 shows the relationship between the current value detected by the load current detector 20 and the elapsed time. If no abnormality occurs when the paper is wound around the paper tube 12, the detected current value with respect to the elapsed time is expressed as, for example, a straight line or a smooth curve. FIG. 3 shows, as an example, a case where the detected current value with respect to the elapsed time is represented as a straight line with a downward slope. This is an example in which the paper is wound around the paper tube 12 neatly, so that the paper is tightly wound at the beginning of winding and then loosely wound. Such winding control can be realized by controlling the tension of the paper.

  The set current value is a threshold value for determining whether or not there is an abnormality when winding the paper. The set current value can be obtained by calculation. For example, the average value of the current values detected by the load current detector 20 during a recent period is used as the set current value.

  Note that the same value (stored value) from the start to the end of paper winding may be used as the set current value. For example, when it is known in advance that the detected current value shows a substantially constant value if no abnormality occurs from the start to the end of winding of the paper, the stored value can be used as the set current value.

  If wrinkles occur when winding paper, the load on the driving device 18 slightly fluctuates when the wrinkles pass between the rear drum 13 and the paper wound around the paper tube 12.

  In S102, the determiner 21 determines whether or not the current value detected by the load current detector 20 is larger than the set current value. If the detected current value is less than or equal to the set current value, it is determined by the determiner 21 that no wrinkle has occurred on the paper (S103).

  When the detected current value is larger than the set current value (Yes in S102), the determiner 21 determines whether or not the set time t1 has elapsed since the detection current value larger than the set current value was detected (S104). ). The set time t1 is a time required for the paper tube 12 (and paper wound around the paper tube 12 in a roll shape) to go around.

  In the present embodiment, a winder 4 employing a surface drive system is shown. That is, the paper tube 12 is driven by the rear drum 13 and the like coming into contact with the outermost paper wound around the paper tube 12. In such a winder 4, normally, the set time t1 becomes longer as the overall diameter of the paper wound around the paper tube 12 becomes larger.

  When the winder 4 employs the drive method, the set time t1 can be obtained by calculation. For example, the set time t1 is calculated using information on the entire diameter of the paper wound around the paper tube 12 and information on the peripheral speed of the rear drum 13.

  When it is detected in S104 that the set time t1 has elapsed, the determiner 21 compares the current value detected by the load current detector 20 at that time with the set current value (S105). If the detected current value at this time is equal to or less than the set current value, it is determined by the determiner 21 that no wrinkle has occurred on the paper (S103).

  If wrinkles occur when winding paper, the wrinkles pass between the rear drum 13 and the paper wound on the paper tube 12, and then pass through the same position again when the set time t1 has elapsed. For this reason, if wrinkles occur when winding the paper, the load on the driving device 18 changes minutely again when the set time t1 elapses after the load on the driving device 18 changes slightly in S102. When it is determined again in S105 that the current value detected by the load current detector 20 is larger than the set current value, the determiner 21 detects that wrinkles have occurred on the paper (S106).

  With the wrinkle detection device having the above configuration, wrinkles generated when winding paper can be detected with high accuracy. There is no possibility that the detection accuracy will be lowered depending on the position where the wrinkle is generated. In addition, the occurrence of wrinkles can be detected with high accuracy even in an environment where paper dust flies.

  In the present embodiment, the case where the load current detector 20 detects the load current of the driving device 18 has been described. This is an example. The load current detector 20 may detect the load current of the drive device 19. In addition, when the rider roll 15 is driven by an electric motor, the load current detector 20 may detect the load current of a driving device that controls the electric motor.

  When a detected current value larger than the set current value is detected in S102, it is also possible to determine by the determiner 21 that a wrinkle has occurred. However, in such a configuration, erroneous detection is more likely to occur than in the configuration disclosed in the present embodiment. With the configuration disclosed in this embodiment, the occurrence of wrinkles can be detected with high accuracy.

  In the present embodiment, the time required for the paper tube 12 to make a round is adopted as the set time t1. This is an example. A time required for the paper tube 12 to make two or three turns may be adopted as the set time t1. However, for example, when the time required for the paper tube 12 to make three revolutions is adopted as the set time t1, there are three sheets of paper outside the bag when the set time t1 has elapsed. When the paper is wound a plurality of times on the outer side of the bag, fluctuations in the load are less likely to appear. For this reason, as the set time t1, it is most preferable to adopt the time required for the paper tube 12 to make a round.

Embodiment 2. FIG.
FIG. 4 is a diagram showing a configuration of a wrinkle detection device according to Embodiment 2 of the present invention.
The wrinkle detection device in the present embodiment further includes a load current detector 22 in the configuration of the wrinkle detection device in the first embodiment. That is, the detection device 5 includes load current detectors 20 and 22 and a determination device 21. Other configurations shown in FIG. 4 are the same as the configurations disclosed in the first embodiment.

  The load current detector 22 detects the load current of the drive device 19. Based on the load current value (detected current value) detected by the load current detector 20 and the load current value (detected current value) detected by the load current detector 22, the determiner 21 determines the paper tube 12. It is determined whether or not wrinkles have occurred on the paper wound around.

  Hereinafter, the function and operation of the bag detection apparatus will be specifically described with reference to FIGS. 5 and 6 as well. FIG. 5 is a flowchart showing the operation of the wrinkle detection apparatus according to Embodiment 2 of the present invention. FIG. 6 is a diagram for explaining the function of the eyelid detection device according to the second embodiment of the present invention.

  When the rear drum 13 is driven by the electric motor 16, the load current detector 20 detects the load current of the driving device 18. When the front drum 14 is driven by the electric motor 17, the load current detector 22 detects the load current of the drive device 19 (S201). The detection of the load current by the load current detectors 20 and 22 is performed with an extremely short period thereafter.

  First, the determiner 21 compares the current value (detected current value) detected by the load current detector 20 with a set current value (S202).

  FIG. 6 shows the relationship between the current value detected by the load current detectors 20 and 22 and the elapsed time. If no abnormality occurs when the paper is wound around the paper tube 12, each detected current value with respect to the elapsed time is expressed as a straight line or a smooth curve, for example. FIG. 6 shows an example in which the current value detected by the load current detector 20 and the current value detected by the load current detector 22 show substantially the same value.

  The set current value is a threshold value for determining whether or not there is an abnormality when winding the paper. For example, the average value of the current values detected by the load current detector 20 during the most recent period is used as the set current value to be compared with the detected current value by the load current detector 20 in S202. In some cases, a constant value (stored value) may be used as the set current value.

  In S202, the determiner 21 determines whether or not the current value detected by the load current detector 20 is greater than the set current value. If the detected current value is less than or equal to the set current value, it is determined by the determiner 21 that no wrinkle has occurred on the paper (S203).

  When the detected current value is larger than the set current value, the determiner 21 determines whether or not the set time t2 has elapsed since the detection current value larger than the set current value was detected in S202 (S204). The set time t2 is the time required for the paper wound in a roll shape on the paper tube 12 to move (rotate) from the position in contact with the rear drum 13 to the position in contact with the front drum 14. The set time t2 can be calculated using, for example, information on the entire diameter of the paper wound around the paper tube 12 and information on the peripheral speed of the rear drum 13.

  When it is detected in S204 that the set time t2 has elapsed, the determiner 21 compares the current value detected by the load current detector 22 at that time with the set current value (S205). For example, the average value of the current values detected by the load current detector 22 during the most recent period is used as the set current value that is compared with the detected current value by the load current detector 22 in S205. In some cases, a constant value (stored value) may be used as the set current value. If the detected current value at this time is equal to or smaller than the set current value, it is determined by the determiner 21 that no wrinkle has occurred on the paper (S203).

  If wrinkles occur when winding the paper, the wrinkles pass between the rear drum 13 and the paper wound on the paper tube 12 and then take up on the front drum 14 and the paper tube 12 when the set time t2 has elapsed. Pass between the printed paper. For this reason, if wrinkles occur when winding the paper, the load on the drive device 19 fluctuates slightly when the set time t2 elapses after the load on the drive device 18 fluctuates slightly in S202.

  If it is determined in S205 that the current value detected by the load current detector 22 is greater than the set current value, the determiner 21 detects that wrinkles have occurred on the paper (S206).

  With the wrinkle detection device having the above configuration, wrinkles generated when winding paper can be detected with high accuracy. There is no possibility that the detection accuracy will be lowered depending on the position where the wrinkle is generated. In addition, the occurrence of wrinkles can be detected with high accuracy even in an environment where paper dust flies.

  In the present embodiment, the case has been described in which the detected current value by the load current detector 22 is compared with the set current value when the detected current value by the load current detector 20 is larger than the set current value. This is an example. When the detected current value by the load current detector 22 is larger than the set current value, the detected current value by the load current detector 20 may be compared with the set current value.

  Further, in the present embodiment, the case where the occurrence of wrinkles is detected based on the load current of the drive device 18 and the load current of the drive device 19 has been described. This is an example. When the rider roll 15 is driven by an electric motor and the electric motor is controlled by a drive device, the occurrence of wrinkles may be detected based on the load current of the drive device and the load current of the drive device 18. Alternatively, the occurrence of wrinkles may be detected based on the load current of the drive device and the load current of the drive device 19.

  In the present embodiment, the time required for the paper to move from the position of the rear drum 13 to the position of the front drum 14 is adopted as the set time t2. This is an example. As the set time t2, a time obtained by adding the time required for the paper tube 12 to make one or two turns to the above time may be employed. However, in such a case, the fluctuation of the load is less likely to appear due to the paper being wound on the outside of the bag. Most preferably, the time required for the paper to move from the position of the rear drum 13 to the position of the front drum 14 is adopted as the set time t2.

Embodiment 3 FIG.
FIG. 7 is a diagram showing a configuration of a wrinkle detection device according to Embodiment 3 of the present invention.
The wrinkle detection device in the present embodiment further includes an electric motor 23 and a drive device 24 in addition to the configuration of the wrinkle detection device in the second embodiment. That is, the winder 4 includes a rear drum 13, a front drum 14, a rider roll 15, electric motors 16, 17 and 23, and driving devices 18, 19 and 24. Moreover, the wrinkle detection device in the present embodiment further includes a load current detector 25. That is, the detection device 5 includes load current detectors 20, 22, and 25 and a determination device 21. Other configurations shown in FIG. 7 are the same as the configurations disclosed in the second embodiment.

  The electric motor 23 generates a driving force for rotating the rider roll 15. The driving device 24 controls the electric motor 23 to rotate and stop the rider roll 15.

  The load current detector 25 detects the load current of the driving device 24. The determiner 21 detects the load current value (detected current value) detected by the load current detector 20, the load current value (detected current value) detected by the load current detector 22, and the load current detector 25. Based on the load current value (detected current value), it is determined whether or not wrinkles have occurred in the paper wound around the paper tube 12.

  Hereinafter, the functions and operations of the main bag detection apparatus will be specifically described with reference to FIGS. 8 and 9 as well. FIG. 8 is a flowchart showing the operation of the wrinkle detection apparatus according to Embodiment 3 of the present invention. FIG. 9 is a diagram for explaining the function of the eyelid detection device according to the third embodiment of the present invention.

  When the rear drum 13 is driven by the electric motor 16, the load current detector 20 detects the load current of the driving device 18. Further, when the front drum 14 is driven by the electric motor 17, the load current detector 22 detects the load current of the drive device 19. When the rider roll 15 is driven by the electric motor 23, the load current detector 25 detects the load current of the driving device 24 (S301). The detection of the load current by the load current detectors 20, 22 and 25 is performed at an extremely short period thereafter.

  First, the determiner 21 compares the current value (detected current value) detected by the load current detector 20 with a set current value (S302).

  FIG. 9 shows the relationship between the current value detected by the load current detectors 20, 22 and 25 and the elapsed time. If no abnormality occurs when the paper is wound around the paper tube 12, each detected current value with respect to the elapsed time is expressed as a straight line or a smooth curve, for example. 9 shows that the current value detected by the load current detector 20 and the current value detected by the load current detector 22 are substantially the same value, and these detected current values are detected by the load current detector 25. A case where the current value is larger than the current value is shown as an example.

  The set current value is a threshold value for determining whether or not there is an abnormality when winding the paper. For example, the average value of the current values detected by the load current detector 20 during the most recent period is used as the set current value that is compared with the detected current value by the load current detector 20 in S302. In some cases, a constant value (stored value) may be used as the set current value.

  In S302, the determiner 21 determines whether or not the current value detected by the load current detector 20 is greater than the set current value. If the detected current value at this time is less than or equal to the set current value, it is determined by the determiner 21 that no wrinkle has occurred on the paper (S303).

  If the detected current value is larger than the set current value in S302, the determiner 21 determines whether or not the set time t3 has elapsed since the detection current value larger than the set current value was detected (S304). The set time t3 is a time required for the paper wound in a roll shape on the paper tube 12 to move (rotate) from the position in contact with the rear drum 13 to the position in contact with the rider roll 15. The set time t3 can be calculated using, for example, information on the entire diameter of the paper wound around the paper tube 12 and information on the peripheral speed of the rear drum 13.

  When it is detected in S304 that the set time t3 has elapsed, the determiner 21 compares the current value detected by the load current detector 25 at that time with the set current value (S305). For example, the average value of the current values detected by the load current detector 25 during the most recent period is used as the set current value that is compared with the detected current value by the load current detector 25 in S305. In some cases, a constant value (stored value) may be used as the set current value. If the detected current value at this time is less than or equal to the set current value, it is determined by the determiner 21 that no wrinkle has occurred on the paper (S303).

  If wrinkles occur when winding the paper, the wrinkles pass between the rear drum 13 and the paper wound on the paper tube 12, and then take up on the rider roll 15 and the paper tube 12 when the set time t3 has elapsed. Pass between the printed paper. For this reason, if wrinkles occur when winding the paper, the load on the driving device 24 fluctuates slightly when the set time t3 has elapsed since the load on the driving device 18 fluctuated in S302.

  When the detected current value is larger than the set current value, the determiner 21 determines whether or not the set time t4 has elapsed since the detection current value larger than the set current value was detected in S305 (S306). The set time t4 is a time required for the paper wound in a roll shape on the paper tube 12 to move (rotate) from a position in contact with the rider roll 15 to a position in contact with the front drum 14. The set time t4 can be calculated using, for example, information on the entire diameter of the paper wound around the paper tube 12 and information on the peripheral speed of the rear drum 13.

  When it is detected in S306 that the set time t4 has elapsed, the determiner 21 compares the current value detected by the load current detector 22 at that time with the set current value (S307). For example, the average value of the current values detected by the load current detector 22 in the most recent period is used as the set current value that is compared with the detected current value by the load current detector 22 in S307. In some cases, the same value (stored value) may be used as the set current value. If the detected current value at this time is less than or equal to the set current value, it is determined by the determiner 21 that no wrinkle has occurred on the paper (S303).

  If it is determined in S307 that the current value detected by the load current detector 22 is greater than the set current value, the determiner 21 detects that wrinkles have occurred on the paper (S308).

  With the wrinkle detection device having the above configuration, wrinkles generated when winding paper can be detected with high accuracy. There is no possibility that the detection accuracy will be lowered depending on the position where the wrinkle is generated. In addition, the occurrence of wrinkles can be detected with high accuracy even in an environment where paper dust flies.

  In the present embodiment, the detected current value by the load current detector 20 is compared with the set current value, the detected current value by the load current detector 25 is compared with the set current value, and then the load current detector 22 is compared. A case has been described in which the detected current value and the set current value are compared. The order of the comparison is not limited to this. When the order of comparison is changed, the set times t3 and t4 are appropriately set according to the change.

In the present embodiment, the time required for the paper to move from the position of the rear drum 13 to the position of the rider roll 15 is used as the set time t3. This is an example. As the set time t3, a time obtained by adding the time required for the paper tube 12 to make one or two turns to the above time may be adopted. However, in such a case, the fluctuation of the load is less likely to appear due to the paper being wound on the outside of the bag. Most preferably, the time required for the paper to move from the position of the rear drum 13 to the position of the rider roll 15 is adopted as the set time t3.
The same can be said for the set time t4.

DESCRIPTION OF SYMBOLS 1 Unwinder 2 Paper roll 3 Cutting machine 4 Winder 5 Detection apparatus 6 Roll paper 7, 10, 16, 17, 23 Electric motor 8, 11, 18, 19, 24 Drive device 9 Slitter 12 Paper tube 13 Rear drum 14 Front drum 15 Rider roll 20, 22, 25 Load current detector 21 Judger

Claims (6)

A rotating body that rotates while bringing the outer peripheral surface into contact with the paper that is wound into a roll;
A driving device for controlling the rotation of the rotating body;
A load current detector for detecting a load current of the driving device;
Wherein when the current value detected by the load current detector is larger than the set current value, comparing the current value with the set current value detected by the load current detector when the set time has elapsed, the load current detector A determinator that detects that wrinkles have occurred in the paper when the current value detected by is greater than the set current value again ;
Equipped with a,
The wrinkle detection device , wherein the set current value is a threshold value for determining whether or not there is an abnormality when winding the paper . The wrinkle detection apparatus according to claim 1 , wherein the set time is a time required for the paper wound up in a roll shape to make a round. A first rotating body and a second rotating body that rotate while contacting the outer peripheral surface of the paper wound in a roll;
A first driving device for controlling rotation of the first rotating body;
A second driving device for controlling rotation of the second rotating body;
A first load current detector for detecting a load current of the first drive device;
A second load current detector for detecting a load current of the second drive device;
The first when the current value detected by the load current detector is larger than the set current value, comparing the current value with the set current value detected by said second load current detector when the set time has elapsed, the A determinator for detecting that the paper is wrinkled when the current value detected by the second load current detector is larger than a set current value;
Equipped with a,
The wrinkle detection device , wherein the set current value is a threshold value for determining whether or not there is an abnormality when winding the paper . The set time, wrinkles according to claim 3 is the time required from the position in which the paper is wound into a roll in contact with said first rotary member to move to a position in contact with said second rotary member Detection device. A first rotating body, a second rotating body, and a third rotating body that rotate while bringing the outer peripheral surface into contact with paper that is wound into a roll;
A first driving device for controlling rotation of the first rotating body;
A second driving device for controlling rotation of the second rotating body;
A third driving device for controlling the rotation of the third rotating body;
A first load current detector for detecting a load current of the first drive device;
A second load current detector for detecting a load current of the second drive device;
A third load current detector for detecting a load current of the third driving device;
Comparing the current value with the set current value detected by said second load current detector when the current value detected by said first load current detector first set time has elapsed is greater than the set current value , compares the current value with the set current value detected by the third load current detector when the current value detected by the second load current detector and the second set time has elapsed is greater than the set current value And a determinator for detecting the occurrence of wrinkles on the paper when the current value detected by the third load current detector is larger than a set current value;
Equipped with a,
The wrinkle detection device , wherein the set current value is a threshold value for determining whether or not there is an abnormality when winding the paper . The first set time is a time required for the paper wound in a roll shape to move from a position in contact with the first rotating body to a position in contact with the second rotating body,
The second set time, according to claim 5 is the time required from the position in which the paper is wound into a roll in contact with said second rotary member to move to a position in contact with said third rotation body皺 detection device.

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