Yarn winder and winding abnormality detection method

Abstract

The present invention relates to a yarn winder and a winding abnormality detection method. An automatic winder (1) is provided with: a yarn monitoring device (17) that detects a travel speed of a yarn (5) that travels from a yarn supply section (18) toward a winding device (30); and a unit control section (11) that detects an abnormality related to winding of the yarn (5). The unit control section (11) detects the abnormality based on a change over time in the travel speed detected by the yarn monitoring device (17).

Description

Technical Field

[0001] This invention relates to a yarn winding machine and a method for detecting winding abnormalities. Background Technology

[0002] Japanese Patent Application Publication No. 2014-24652 discloses a yarn take-up machine comprising: a yarn supply section for supplying yarn; a take-up section for taking up and forming a package by traversing (reciprocating) the yarn supplied from the yarn supply section; a detection mechanism for detecting the travel speed of the yarn; and an abnormality detection section for detecting whether there is a take-up abnormality of the yarn based on the travel speed.

[0003] In Japanese Patent Application Publication No. 2014-24652, the detection of whether a winding anomaly (lateral movement anomaly) occurs is based on the periodic change of travel speed. This is based on the idea that the travel speed changes periodically with the change of lateral movement position during winding.

[0004] Specifically, in Japanese Patent Application Publication No. 2014-24652, when the number of periodic changes in the travel speed is less than a specified number within a specified range, it is judged as a take-up abnormality, such as yarn winding around the take-up drum. Furthermore, when the periodic changes in the travel speed are biased towards either a higher or lower speed side compared to normal, it is judged as an increased likelihood of yarn skipping due to skew at the drive point (the point where the take-up drum transmits the rotational driving force to the package).

[0005] However, Japanese Patent Application Publication No. 2014-24652 does not describe a specific method for detecting the periodic changes in travel speed. The inventors of this application have identified the following problem: Since the travel speed exhibits varying maxima and minima over time, it is sometimes difficult to accurately detect the periodic changes in travel speed. Specifically, it has been identified that it is sometimes difficult to accurately calculate the number of periodic changes based on the varying maxima and minima. In yarn take-up machines, it is desirable to detect yarn take-up anomalies with high precision. Summary of the Invention

[0006] One objective of this invention is to provide a yarn winding machine and a method for detecting winding abnormalities with high precision.

[0007] One aspect of the present invention relates to a yarn take-up machine comprising: a yarn supply section capable of supplying yarn; a take-up section for winding the yarn supplied from the yarn supply section by lateral movement and forming a package; a speed acquisition section for acquiring the travel speed of the yarn traveling from the yarn supply section toward the take-up section; and an anomaly detection section for detecting anomalies related to yarn take-up based on the travel speed acquired by the speed acquisition section. The anomaly detection section identifies a maximum or minimum value that satisfies a predetermined condition among the maximum or minimum values ​​that occur in the change of travel speed over time as an anomaly, or identifies a maximum or minimum value that satisfies a predetermined condition among the maximum or minimum values ​​that occur in the change of speed ratio obtained by dividing the travel speed by a speed related to the circumferential speed of the package over time, and detects an anomaly based on the occurrence interval of the anomaly.

[0008] In a yarn take-up machine according to one aspect of the present invention, singularities are determined based on the occurrence of maximum or minimum values. This allows for the determination of the maximum or minimum values ​​required for anomaly detection by observing the time-varying occurrences of varying maximum or minimum values. Then, based on the determined intervals between the occurrences of singularities, yarn take-up anomalies can be detected with high precision.

[0009] In one embodiment, the system may include a setting unit that sets a reference interval, and an anomaly detection unit that determines a maximum or minimum value within the reference interval as a singularity based on a predetermined condition. In this configuration, unnecessary maximum or minimum values ​​in anomaly detection can be removed based on the reference interval, allowing for high-precision anomaly detection based solely on the maximum or minimum values ​​required for anomaly detection.

[0010] In one embodiment, the reference interval can be determined based on a predetermined yarn length taken up by the take-up section as the yarn moves from one end of the package to the other by traversing the yarn laterally. This predetermined yarn length is a fixed length independent of the travel speed. In this configuration, the singularity can be determined based on the yarn length regardless of the travel speed.

[0011] In one implementation, the setting unit may set a normal range for points that have advanced a reference interval from a predetermined singularity, and the anomaly detection unit may determine a singularity based on a maximum or minimum value within the normal range that satisfies a predetermined condition. During normal winding, singularities can be determined according to each reference interval, enabling high-precision singularity determination.

[0012] In one embodiment, the anomaly detection unit determines an anomaly when, within a normal range of a quantity that has been continuously set to a first number, the number of times a maximum or minimum value is not found within the normal range exceeds a second number, thus constituting an anomaly. Sometimes, due to reasons other than yarn take-up anomalies (such as poor signal processing), a situation arises where singularities are temporarily absent within the normal range. In this case, the absence of a singularity is also temporary. Therefore, it is unnecessary to stop the yarn take-up process due to an anomaly. In this configuration, even when a maximum or minimum value is temporarily absent within the normal range, an abnormal stop in the yarn take-up process can be prevented. This prevents unnecessary abnormal stops without affecting package quality.

[0013] In one embodiment, the anomaly detection unit may set an inference point within the normal range when no maximum or minimum value exists within the normal range. If, within the normal range of a quantity for which the first inference point has been set consecutively, the anomaly condition is met if the number of times the inference point has been set exceeds the second inference point, an anomaly is determined. Sometimes, due to reasons other than yarn take-up anomalies (such as poor signal processing), a situation may arise where no singularity exists within the normal range. In this case, the absence of a yarn take-up anomaly and the absence of a maximum or minimum value are also temporary. Therefore, it is not necessary to stop the yarn take-up process due to an anomaly. In this configuration, even when no maximum or minimum value exists temporarily within the normal range, setting an inference point can prevent the yarn take-up process from stopping abnormally. This prevents unnecessary abnormal stops without affecting package quality.

[0014] In one embodiment, a capturing unit may be included to capture abnormal portions contained in the yarn package. An abnormality detection unit calculates the length of the abnormal portion based on an inference point, and the capturing unit captures the abnormal portion of the calculated length from the package. In this configuration, yarn wound around the package after an abnormality occurs can be appropriately captured. Therefore, in the yarn winding machine, yarn winding can be restarted after an abnormality occurs.

[0015] In one embodiment, the setting unit may update the reference interval based on past occurrence intervals. In this configuration, the reference interval can be updated at any time, thus enabling the rationalization of the reference interval.

[0016] In one embodiment, the system may include: a storage unit for storing the maximum or minimum travel speed; and an update unit that, when the storage unit stores a maximum value, compares a new travel speed obtained by the speed acquisition unit with the maximum value stored in the storage unit. If the new travel speed is greater, the maximum value stored in the storage unit is updated to the new maximum value; or, when the storage unit stores a minimum value, compares a new travel speed obtained by the speed acquisition unit with the minimum value stored in the storage unit. If the new travel speed is less, the minimum value stored in the storage unit is updated to the new minimum value. An anomaly detection unit determines the maximum or minimum value stored in the storage unit as a maximum or minimum value when a predetermined difference exists between the first position of the yarn when the speed acquisition unit obtains a new travel speed and the second position of the yarn when the update unit updates the maximum or minimum value. In this configuration, instead of setting all points where the travel speed increases or decreases as maximum or minimum values, it is possible to set the maximum or minimum values ​​within a predetermined range of yarn length as maximum or minimum values. Therefore, it can reduce the number of maxima or minima that need to be stored, and reduce the number of maxima or minima that need to be explored when determining singularities.

[0017] In one embodiment, the anomaly detection unit can determine an anomaly when a change in the interval occurs. This configuration enables high-precision detection of winding anomalies in stepped winding.

[0018] One aspect of the present invention relates to a yarn take-up machine comprising: a yarn supply section capable of supplying yarn; a take-up section capable of traversing the yarn supplied from the yarn supply section to take up and form a package; a speed acquisition section capable of acquiring the travel speed of the yarn traveling from the yarn supply section toward the take-up section; and an anomaly detection section capable of detecting anomalies related to yarn take-up based on the travel speed of the yarn acquired by the speed acquisition section. The anomaly detection section determines a first singularity and a second singularity respectively among the maximum and minimum values ​​of the travel speed over time that satisfy predetermined conditions, or determines a first singularity and a second singularity respectively among the maximum and minimum values ​​of the speed ratio obtained by dividing the travel speed acquired by the speed acquisition section by a speed related to the circumferential speed of the package over time that satisfy predetermined conditions, and detects an anomaly based on the difference between the first singularity and the second singularity closest to the first singularity.

[0019] The inventors of this application have realized that when a take-up anomaly known as "ribbon winding" occurs in a package, the yarn speed during take-up does not change. Based on this realization, the inventors have discovered that the difference between a specific maximum and a specific minimum value that appears in the change of yarn travel speed or speed ratio over time is related to the occurrence of the yarn take-up anomaly (ribbon winding). Therefore, in a yarn take-up machine according to one aspect of the present invention, the anomaly detection unit determines a first singularity and a second singularity based on the maximum and minimum values ​​that appear in the change of travel speed or speed ratio over time, and detects the anomaly based on the difference between the first singularity and the second singularity. Thus, the take-up anomaly of ribbon winding can be detected in the yarn take-up machine. Therefore, the take-up anomaly of yarn can be detected with high precision in the yarn take-up machine.

[0020] In one embodiment, the system may include a setting unit that sets a reference interval, and an anomaly detection unit that determines a first singularity and a second singularity based on the maximum and minimum values ​​occurring within the reference interval satisfying predetermined conditions. In this configuration, unwanted maximum or minimum values ​​can be removed from the anomaly determination process, allowing for high-precision anomaly detection based solely on the maximum and minimum values ​​required for anomaly determination.

[0021] In one embodiment, the reference interval can be determined based on a predetermined yarn length taken up by the take-up section as the yarn moves from one end of the package to the other by traversing the yarn laterally. This predetermined yarn length is a fixed length independent of the travel speed. In this configuration, the singularity can be determined based on the yarn length regardless of the travel speed.

[0022] In one embodiment, the setting unit may set a normal range for points that have deviated from a predetermined singularity by a reference interval amount, and the anomaly detection unit may determine the maximum and minimum values ​​within the normal range as the first singularity and the second singularity, respectively, based on the condition that these maximum and minimum values ​​satisfy a predetermined condition. During normal winding, the first and second singularities can be determined for each reference interval, thus enabling high-precision determination of the first and second singularities.

[0023] In one embodiment, the system may include: a storage unit that stores the maximum and minimum values ​​of the travel speed; and an update unit that compares the new travel speed obtained by the speed acquisition unit with the maximum and minimum values ​​stored in the storage unit. If the new travel speed is greater than the maximum value or less than the minimum value, the maximum or minimum value stored in the storage unit is updated to the new maximum or minimum value. An anomaly detection unit determines the maximum or minimum value stored in the storage unit as a maximum or minimum value when a predetermined difference exists between the first position of the yarn when the speed acquisition unit obtains the new travel speed and the second position of the yarn when the update unit updates the maximum or minimum value. In this configuration, instead of setting all points where the travel speed increases or decreases as maximum or minimum values, the maximum or minimum values ​​within a predetermined range of the yarn length can be set as maximum or minimum values. Therefore, the number of maximum or minimum values ​​to be stored can be reduced, and the number of maximum or minimum values ​​that need to be considered when determining the first and second singularities can be reduced.

[0024] In one embodiment, the anomaly detection unit determines an anomaly if the difference between the first singularity and the second singularity closest to the first singularity is below a threshold. This configuration enables high-precision detection of winding anomalies in the strip winding.

[0025] In one embodiment, the anomaly detection unit may determine an anomaly if it is impossible to determine the first singularity and / or the second singularity during the winding of the yarn length related to the anomaly determination. This configuration enables high-precision detection of winding anomalies in the ribbon winding.

[0026] In one embodiment, the anomaly detection unit determines an anomaly when the maximum and / or minimum values ​​cannot be determined during the winding of the yarn length related to the anomaly determination. This configuration enables high-precision detection of winding anomalies in the ribbon winding.

[0027] In one embodiment, the machine may include: a splicing device that performs a splicing operation to make the yarn continuous when the yarn is disconnected between the yarn supply section and the take-up section; and a capturing unit that captures abnormal portions of the yarn forming the package, wherein an abnormality detection unit calculates the distance the yarn has traveled from the time the splicing operation is performed in the splicing device until the abnormality is detected, and the capturing unit captures the abnormal portion from the package by setting the travel distance to the length of the abnormal portion. In this configuration, the yarn wound on the package after an abnormality has occurred can be captured appropriately. Therefore, in the yarn take-up machine, yarn take-up can be restarted after an abnormality occurs.

[0028] In one embodiment, the yarn may be provided with a tension detection unit that detects the tension of the yarn traveling from the yarn supply unit toward the take-up unit, and the speed acquisition unit acquires the travel speed based on the tension of the yarn detected by the tension detection unit.

[0029] One aspect of the present invention relates to a yarn take-up machine comprising: a yarn supply section capable of supplying yarn; a take-up section capable of traversing the yarn supplied from the yarn supply section to take up and form a package; a tension detection section capable of detecting the tension of the yarn traveling from the yarn supply section toward the take-up section; and an anomaly detection section capable of detecting anomalies related to yarn take-up based on the tension of the yarn detected by the tension detection section. The anomaly detection section identifies a maximum or minimum value that meets a predetermined condition among the maximum or minimum values ​​that occur during the change of tension over time as a singularity, and detects anomalies based on the interval between the occurrence of singularities.

[0030] In a yarn take-up machine according to one aspect of the present invention, singularities can be determined based on the occurrence of maximum or minimum values. Thus, by observing the time-varying occurrence of maximum or minimum values ​​of varying magnitudes, the maximum or minimum values ​​required for anomaly detection can be determined. Then, based on the occurrence interval of the determined singularities, yarn take-up anomalies can be detected with high precision.

[0031] One aspect of the present invention relates to a yarn take-up machine comprising: a yarn supply section capable of supplying yarn; a take-up section capable of traversing the yarn supplied from the yarn supply section to take up and form a package; a tension detection section capable of detecting the tension of the yarn traveling from the yarn supply section toward the take-up section; and an anomaly detection section capable of detecting anomalies related to yarn take-up based on the tension of the yarn detected by the tension detection section. The anomaly detection section determines a first singularity and a second singularity, respectively, among the maximum and minimum values ​​that occur during the change of tension over time, based on the maximum and minimum values ​​that satisfy predetermined conditions, and detects an anomaly based on the difference between the first singularity and the second singularity closest to the first singularity.

[0032] The inventors of this application have realized that when a take-up anomaly known as "ribbon winding" occurs in a package, the tension of the yarn during take-up does not change. Based on this realization, the inventors have discovered that the difference between a definite maximum and a definite minimum value that appears in the change of yarn tension over time is related to the occurrence of the yarn take-up anomaly (ribbon winding). Therefore, in a yarn take-up machine according to one aspect of the present invention, the anomaly detection unit determines a first singularity and a second singularity based on the maximum and minimum values ​​that appear in the change of yarn tension over time, and detects the anomaly based on the difference between the first singularity and the second singularity. Thus, a ribbon winding take-up anomaly can be detected in the yarn take-up machine. Therefore, a yarn take-up anomaly can be detected with high precision in the yarn take-up machine.

[0033] One aspect of the present invention is a winding anomaly detection method, which is executed in a yarn winding machine having a yarn supply section capable of supplying yarn and a winding section for winding and forming a package by transverse movement of the yarn supplied from the yarn supply section. The method includes: a speed acquisition step, which acquires the travel speed of the yarn traveling from the yarn supply section toward the winding section; and an anomaly detection step, which detects anomalies related to yarn winding based on the travel speed acquired in the speed acquisition step. In the anomaly detection step, a maximum or minimum value that satisfies a predetermined condition among the maximum or minimum values ​​that occur in the change of the travel speed over time is identified as an anomaly, or a maximum or minimum value that satisfies a predetermined condition among the maximum or minimum values ​​that occur in the change of the speed ratio obtained by dividing the travel speed by a speed related to the circumferential speed of the package over time is identified as an anomaly, and the anomaly is detected based on the interval between the occurrence of the anomalies.

[0034] In one aspect of the winding anomaly detection method of the present invention, singularities are determined based on the occurrence of maxima or minima. This allows for the determination of the maxima or minima required for anomaly detection by observing the time-varying occurrences of maxima or minima of varying magnitudes. Then, based on the determined intervals between the occurrences of singularities, winding anomalies of the yarn can be detected with high precision.

[0035] One aspect of the present invention is a winding anomaly detection method, which is executed in a yarn winding machine having a yarn supply section capable of supplying yarn and a winding section for winding and forming a package by transverse movement of the yarn supplied from the yarn supply section. The method includes: a speed acquisition step, which acquires the travel speed of the yarn moving from the yarn supply section toward the winding section; and an anomaly detection step, which detects anomalies related to yarn winding based on the travel speed of the yarn acquired in the speed acquisition step. In the anomaly detection step, the maximum and minimum values ​​of the travel speed over time that satisfy predetermined conditions are respectively determined as a first singularity and a second singularity, or the maximum and minimum values ​​of the speed ratio obtained by dividing the travel speed by a speed related to the circumferential speed of the package over time that satisfy predetermined conditions are respectively determined as a first singularity and a second singularity, and the anomaly is detected based on the difference between the first singularity and the second singularity closest to the first singularity.

[0036] The inventors of this application have realized that when a take-up anomaly, referred to as "ribbon winding," occurs in a package, the yarn speed during take-up remains unchanged. Based on this realization, the inventors have discovered that the difference between a definite maximum and a definite minimum value appearing in the change of yarn travel speed or speed ratio over time is related to the occurrence of the yarn take-up anomaly (ribbon winding). Therefore, in a take-up anomaly detection method according to one aspect of this invention, in the anomaly detection step, a first singularity and a second singularity are determined based on the maximum and minimum values ​​appearing in the change of travel speed or speed ratio over time, and the anomaly is detected based on the difference between the first singularity and the second singularity. Thus, the take-up anomaly detection method can detect ribbon winding take-up anomalies. Therefore, the take-up anomaly detection method can detect yarn take-up anomalies with high precision.

[0037] According to one aspect of the present invention, yarn winding abnormalities can be detected with high precision. Attached Figure Description

[0038] Figure 1 This is a front view of an automatic winding machine according to one implementation method.

[0039] Figure 2 yes Figure 1 The diagram shows a front view of the take-up unit included in the spinning machine.

[0040] Figure 3 (a) is a graph showing the speed of yarn travel relative to time. Figure 3 (b) is a graph showing the speed ratio relative to time.

[0041] Figure 4It is a graph that represents the speed ratio relative to time.

[0042] Figure 5 This is a diagram illustrating the method for setting inference extreme values.

[0043] Figure 6 It is a graph showing the judgment results and the lateral movement anomaly rate.

[0044] Figure 7 (a) is a graph showing the relationship between speed ratio and time under normal conditions. Figure 7 (b) is a graph showing the relationship between the speed ratio and time under the condition that the ribbon winding anomaly occurs.

[0045] Figure 8 (a) is a diagram showing the state in which a strip is wound in the roll. Figure 8 (b) is a diagram showing the state of stepped winding in the roll. Detailed Implementation

[0046] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Furthermore, in the description of the drawings, the same or equivalent elements are given the same reference numerals, and repeated descriptions are omitted.

[0047] like Figure 1 As shown, the automatic winding machine (yarn take-up machine) 1 has a machine control device 2, multiple take-up units 10, and a doffing device 40.

[0048] The machine control unit 2 includes a setting unit 3 and a display unit (reporting unit) 4. The operator performs appropriate operations using the setting unit 3, thereby enabling the setting of the take-up unit 10. The display unit 4 can display information related to the setting content and / or status of the take-up unit 10.

[0049] Multiple take-up units 10 are arranged, for example, in a row. Each take-up unit 10 takes the yarn 5 unwound from the yarn supply bobbin 6 into the take-up bobbin 7 (see reference 6) while the yarn is being moved laterally. Figure 2 This forms the package 8. Various sizes and shapes of products can be used as the take-up bobbin 7 and the package 8. For example, the take-up bobbin 7 and the package 8 can be truncated cones (cone shapes) or cylindrical shapes. In this embodiment, in the machine height direction, the take-up bobbin 7 and the package 8 are positioned vertically upward relative to the yarn feed bobbin 6, so that the yarn 5 travels from the bottom to the top.

[0050] like Figure 2As shown, the winding unit 10 includes a unit control unit (abnormal detection unit) 11 and a unit body 12. The unit control unit 11 includes, for example, a CPU, RAM, ROM, I / O ports, and a communication port. The ROM stores a program for controlling each component of the unit body 12. Each device of the unit body 12 and the machine control device 2 are connected to the I / O ports and the communication port. Thus, the unit control unit 11 can control the operation of each device of the unit body 12 while communicating with the machine control device 2. Furthermore, the unit control unit 11 includes a storage unit and an update unit, which will be described later. Alternatively, the storage unit and the update unit may be located outside the unit control unit 11.

[0051] The main body 12 comprises, in the path of the yarn 5 traveling from the yarn supply bobbin 6 to the take-up bobbin 7 and the package 8, a yarn unwinding auxiliary device 13, a tension applying device 14, a tension detection device (tension detection unit) 15, a splicing device 16, and a yarn monitoring device (speed acquisition unit) 17, arranged sequentially from the yarn supply bobbin 6 side. A yarn supply unit 18 is provided at the lower part of the main body 12. The yarn supply unit 18 holds the yarn supply bobbin 6, which is transported by the bobbin transport system (not shown), at a predetermined position. Alternatively, the yarn supply unit 18 may be configured to hold the yarn supply bobbin 6 supplied manually by an operator at a predetermined position.

[0052] The yarn unwinding assist device 13 assists in the smooth unwinding of the yarn 5 by controlling the air ring formed by the yarn 5 unwinding from the yarn supply bobbin 6 to an appropriate size. The tension applying device 14 applies a predetermined tension to the traveling yarn 5. As the tension applying device 14, a rack-type or disc-type device can be used. The tension detection device 15 detects (measures) the tension of the traveling yarn 5 between the yarn supply section 18 and the take-up device 30 (tension detection step). The tension detection device 15 outputs a tension measurement signal indicating the measured tension value of the yarn 5 to the unit control section 11. The splicing device 16 splices the lower yarn from the yarn supply bobbin 6 with the upper yarn from the package 8 when the yarn monitoring device 17 detects a yarn defect and cuts the yarn, or when a yarn break occurs during unwinding from the yarn supply bobbin 6. As the splicing device 16, a mechanical knotter or a splicer using fluids such as compressed air can be used.

[0053] The yarn monitoring device 17 detects the state of the yarn 5 wound on the package 8. For example, the yarn monitoring device 17 detects yarn defects such as thick sections by detecting the thickness of the yarn 5. The yarn monitoring device 17 can detect not only abnormalities in the thickness of the yarn 5 as yarn defects, but also whether the yarn 5 contains foreign objects. A cutter may also be provided in the yarn monitoring device 17 to cut the yarn 5 if a yarn defect is detected. The yarn monitoring device 17 detects the speed of the traveling yarn 5 (speed acquisition step). The yarn monitoring device 17 detects and acquires the traveling speed of the yarn 5 traveling from the yarn supply bobbin 6 towards the take-up device 30. The yarn monitoring device 17 outputs speed data related to the traveling speed of the yarn 5 to the unit control unit 11. The speed data is, for example, a periodically changing pulse signal corresponding to the traveling speed of the yarn 5. The speed data can also be calculated based on the amount of yarn traveled per unit time. Furthermore, the calculation can also be based on the elapsed time per unit travel distance of the yarn 5. Additionally, the yarn monitoring device 17 can measure the take-up length of the yarn 5 based on speed data.

[0054] The storage unit stores the traveling speed of the yarn 5, the maximum and minimum traveling speeds (described later), the maximum value and the minimum value, as well as the maximum and minimum values, detected by the yarn monitoring device 17.

[0055] A yarn-catching component 19 is provided on the lower side of the splicing device 16 to capture the yarn end and guide it to the splicing device 16. The yarn-catching component 19 has a tube arm 20b that rotates up and down around a shaft 19a, and a yarn-drawing port 19c provided at the front end of the tube arm 20b. A negative pressure source (not shown) is connected to the tube arm 20b to generate a suction flow in the yarn-drawing port 19c for capturing the yarn.

[0056] A yarn-catching component 20 is provided on the upper side of the splicing device 16 to capture and guide the yarn to the splicing device 16. The yarn-catching component 20 has a tube arm 20b that rotates up and down around a shaft 20a, and a yarn-catching suction port 20c provided at the front end of the tube arm 20b. A negative pressure source (not shown) is connected to the tube arm 20b to generate a suction flow at the yarn-catching suction port 20c for capturing the yarn. The yarn-catching component 20 functions as a capturing part that captures a predetermined length of yarn 5 from the end of the yarn 5 in the package 8.

[0057] The unit body 12 also has a winding device (winding section) 30 that winds the yarn 5 onto the package 8 while moving it laterally. The winding device 30 winds the yarn 5 onto the package 8 while moving it laterally. The winding device 30 has a rocker arm 31 and a drum (rotating body) 45.

[0058] The cradle 31 holds the package 8 by clamping the take-up bobbin 7. The cradle 31 is configured to swing to a state that brings the held package 8 into contact with the drum 45, and to a state that separates the package 8 from the drum 45. When the cradle 31 holds the take-up bobbin 7 with the yarn 5 wound on it, the drum 45 rotates in contact with the outer peripheral surface of the package 8. When the cradle 31 holds an empty take-up bobbin 7 without the yarn 5 wound on it, the drum 45 rotates in contact with the outer peripheral surface of the take-up bobbin 7.

[0059] The drum 45 transmits the rotational driving force of the motor 47 to the package 8 in contact with the drum 45, causing the package 8 to rotate and the yarn 5 to move laterally on the surface of the package 8. The drum 45 has a spiral-shaped transverse groove 45a formed on its outer circumferential surface. The drum 45 is driven to rotate by the motor 47. The motor 47 is located at one end of the drum 45 and is housed in the unit frame 10a. Examples of motors 47 include, for example, a servo motor or a stepper motor. The motor 47 is controlled by the unit control unit 11.

[0060] The yarn 5, unwound from the yarn feed bobbin 6, is wound onto the surface of the package 8 while moving laterally at a certain width through the lateral groove 45a formed on the outer circumferential surface of the drum 45. This allows the package 8 to be formed with a certain winding width. Furthermore, by moving the yarn 5 laterally through the take-up unit 10, the yarn can be moved from one end of the take-up bobbin 7 and the package 8 to the other end. Furthermore, "end" here does not necessarily refer to the "edge" of the take-up bobbin 7 and the package 8, but can also refer to a range of a certain width. Moreover, "end to end" can mean from one end of the take-up bobbin 7 and the package 8 to the other end, or it can mean the yarn moves from one end of the take-up bobbin 7 and the package 8 to the other end and then returns to one end. In the case of "from one end of the take-up bobbin 7 and the package 8 to the other end," the lateral movement based on the lateral yarn guide, described later, is particularly advantageous. Furthermore, it is particularly advantageous in the case of "the yarn moving from one end of the take-up bobbin 7 and the winding 8 to the other end and then returning to one end", which is based on the traverse motion of the drum 45.

[0061] With the cradle 31 holding the take-up bobbin 7 with the yarn 5 wound on it, the drum 45 contacts the outer peripheral surface of the package 8. With the cradle 31 holding the empty take-up bobbin 7 without the yarn 5 wound on it, the drum 45 contacts the outer peripheral surface of the take-up bobbin 7. In the following description, the package 8 and the take-up bobbin 7 will also be referred to as the package 8.

[0062] The doffing device 40 is, for example, moved to the position of the take-up unit 10 when the package 8 is fully wound in the take-up unit 10, to doff the fully wound package 8 from the take-up unit 10, and to supply an empty take-up bobbin 7 to the take-up unit 10. The package 8 doffed by the doffing device 40 is discharged to a loading section (not shown) located at the rear of each take-up unit 10 (with the side containing the operator's passage relative to the automatic winding machine 1 designated as the front side, and the opposite side as the rear side), and is retrieved by various mechanisms. Furthermore, the doffing device 40 can appropriately discharge not only fully wound packages 8, but also partially wound packages 8 and empty take-up bobbins 7. The doffing device 40 may also be omitted from the automatic winding machine 1. In this case, it is preferable for the operator to perform the doffing operation manually.

[0063] Next, the method for detecting take-up abnormalities performed in the automatic winding machine 1 will be explained.

[0064] [Staircase winding take-up anomaly]

[0065] First, the detection method for a winding anomaly known as "stepped winding" is explained in detail. For example... Figure 8 As shown in (a), the take-up anomaly known as stepped winding is an anomaly that produces a height difference on the package 8. Stepped winding occurs because the traverse length of the yarn 5 continuously shortens during take-up. Specifically, for example, it occurs because, in the plate-shaped guide member (not shown) in the traverse region, a portion of the yarn 5 accumulates fly waste or the like between two opposing plates, preventing it from traversing to the end side of the package 8.

[0066] The unit control unit 11 detects anomalies (hereinafter referred to as "step-winding anomalies") related to the take-up of the yarn 5 based on the traveling speed of the yarn 5 detected by the yarn monitoring device 17 (anomaly detection step). The unit control unit 11 determines a maximum or minimum value that meets a specified condition among the maximum or minimum values ​​that appear in the change of the traveling speed over time as a singularity, or determines a maximum or minimum value that meets a specified condition among the maximum or minimum values ​​that appear in the change of the speed ratio obtained by dividing the traveling speed by the speed related to the circumferential speed of the package 8 over time as a singularity, and detects step-winding anomalies based on the interval between the occurrence of singularities.

[0067] The method for determining the maximum and minimum values ​​will be explained below. The storage unit stores the maximum and minimum values ​​of the travel speed as initial values. The updating unit compares the travel speed of the yarn 5, obtained by the yarn monitoring device 17, with the maximum and minimum values ​​of the travel speed stored in the storage unit. Furthermore, if the travel speed obtained by the yarn monitoring device 17 is greater than the maximum value of the travel speed stored in the storage unit, or if the travel speed obtained by the yarn monitoring device 17 is less than the minimum value of the travel speed stored in the storage unit, the maximum or minimum value stored in the storage unit is updated according to the travel speed obtained by the yarn monitoring device 17. The unit control unit 11 also stores the yarn position (first position) when the maximum or minimum travel speed is stored in the storage unit. That is, the storage unit stores the first position for the maximum value and the first position for the minimum value.

[0068] Then, the updating unit updates the maximum or minimum travel speed stored in the storage unit as needed. Furthermore, the unit control unit 11 compares the yarn position (second position) obtained by the yarn monitoring device 17 at a position different from the first position with the first position. When a predetermined difference occurs between the first and second positions, the unit control unit 11 determines the maximum or minimum value stored in the storage unit as a maximum or minimum value. That is, the unit control unit 11 determines the maximum or minimum travel speed stored in the storage unit as a maximum or minimum value when the maximum or minimum travel speed stored in the storage unit is not updated for a yarn length corresponding to the predetermined difference. The predetermined difference here can be set to more than half the length of the normal range R described later, and less than or equal to the length obtained by subtracting half the length of the normal range R from the reference interval. More preferably, by setting the predetermined difference to half the reference interval, the maximum or minimum value can be determined with high accuracy while reducing the maximum or minimum value that becomes noise. Furthermore, the second position becomes a position that is delayed in time compared to the first position.

[0069] Furthermore, it is not necessary to store the maximum and minimum travel speeds in the storage unit; storing only one of the maximum and minimum travel speeds is sufficient. Alternatively, the storage unit may not store the maximum and minimum travel speeds used as initial values. In this case, it is sufficient to store the first travel speed obtained as both the maximum and minimum values.

[0070] The unit control unit 11 includes a setting unit for setting a reference interval. The setting unit can also set the reference interval via operator input. Alternatively, a pre-stored initial value can be set as the reference interval. The set reference interval can be set to the traverse length or half of the traverse length. The traverse length refers to the length from which the yarn moves from one end of the take-up bobbin 7 and the package 8 to the other end, and then returns to one end. Half of the traverse length refers to the length from one end of the take-up bobbin 7 and the package 8 to the other end. By setting the reference interval to the traverse length or half of the traverse length, abnormalities can be detected based on the yarn length, regardless of the travel speed. That is, abnormalities can be detected even when the travel speed, such as at the start of yarn winding, is not constant over time.

[0071] Furthermore, the set reference interval can also be set as a time interval. When the reference interval is set as a time interval, anomalies cannot be detected when the travel speed, such as at the start of yarn winding, is not constant over time. However, when the travel speed is constant over time, anomalies can be detected because the singularity occurs in each cycle under normal conditions. In other words, setting the reference interval as a time interval simplifies the process. In the following explanation, the reference interval will be set to the traverse length. Furthermore, the reference interval, traverse length, or half the traverse length, and time interval do not necessarily need to be consistent; they can be set to values ​​within a certain range.

[0072] The unit control unit 11 extracts the maximum or minimum values ​​occurring at the reference interval as singularities. Specifically, when the reference interval is set as the traverse length, the unit control unit 11 extracts the maximum or minimum values ​​occurring in an interval where the travel distance from the previous singularity is approximately equal to the traverse length as singularities (under predetermined conditions). Then, the unit control unit 11 performs anomaly detection based on the frequency of occurrence of the extracted singularities. Maximum or minimum values ​​occurring outside the reference interval are treated as noise or discontinuous traverse defects and are not judged as anomalies. In the case of continuous traverse defects, the roll shape becomes stepped, and therefore it is judged as an anomaly.

[0073] In this embodiment, the unit control unit 11 determines the minimum value of a singularity based on the minimum value that appears in the change of the speed ratio obtained by dividing the traveling speed by the speed related to the circumferential speed of the roll 8 over time, and detects a stepped winding abnormality based on the occurrence interval of the singularity. The unit control unit 11 calculates the speed related to the circumferential speed of the roll 8 based on the circumferential speed of the drum 45 (hereinafter also referred to as "drum circumferential speed"). The unit control unit 11 calculates the drum circumferential speed based on the rotational speed of the drum 45. The unit control unit 11 inputs a pulse (hereinafter also referred to as "drum pulse") with a frequency proportional to the rotational speed of the drum 45, and calculates the rotational speed of the drum 45 based on the drum pulse. The unit control unit 11 determines a stepped winding abnormality when the occurrence interval changes. Alternatively, as a method for calculating the speed related to the circumferential speed of the roll 8, a detection unit that directly detects the rotational speed of the roll 8 can be provided, and the calculation can be performed based on the detection result.

[0074] The unit control unit 11 calculates the speed ratio. The unit control unit 11 calculates the speed ratio by dividing the traveling speed of the yarn 5 detected by the yarn monitoring device 17 by the drum circumferential speed.

[0075] exist Figure 3 In (a), the horizontal axis represents time, and the vertical axis represents the speed of yarn 5. Figure 3 In (a), the solid line represents the speed of travel, and the dashed line represents the circumferential speed of the drum. For example... Figure 3 As shown in (a), during accelerated winding, the drum circumferential speed increases, and the travel speed increases while periodically changing around the drum circumferential speed. At this time, as the yarn 5 is wound, the periodicity of the travel speed changes shortens, and the amplitude increases. When the accelerated winding period ends and the preset winding speed is reached, the process transitions to constant speed winding. During constant speed winding, the drum circumferential speed becomes approximately constant, and the travel speed changes periodically around the drum circumferential speed. At this time, both the period and the amplitude become approximately constant.

[0076] exist Figure 3 In (b), the horizontal axis represents time, and the vertical axis represents the velocity ratio. For example... Figure 3 As shown in (b), the speed ratio, , varies periodically around a predetermined value (e.g., "1"), whether during accelerated or constant-speed winding. The amplitude of the speed ratio, , remains approximately constant during both accelerated and constant-speed winding. Thus, by converting speed data to speed ratio, singularities can be determined based on minimum values ​​that occur over time, independent of the winding speed.

[0077] The unit control unit 11 determines the minimum value that appears in the calculated change of the velocity ratio over time as a singularity. Figure 4In the diagram, the horizontal axis represents time, and the vertical axis represents the velocity ratio. For example... Figure 4 As shown, a minimum value (the part enclosed by the dashed circle) appears in the change of the speed ratio over time. The unit control unit 11 identifies the minimum value as a singularity and detects a stepped winding anomaly when the interval between the occurrence of the singularity changes.

[0078] The unit control unit 11 sets the normal range R of the singularity based on the reference interval set by the setting unit. Maximum or minimum values ​​existing within the normal range R are set as singularities (prescribed conditions). If a maximum or minimum value does not exist within the normal range R, an inference point is set within the normal range R. The unit control unit 11 determines a stepped winding anomaly if the number of times the inference point is set meets the prescribed abnormality conditions.

[0079] Specifically, such as Figure 5 As shown, the unit control unit 11 sets the normal range R of the singularity based on the reference interval set by the setting unit. The normal range R is calculated as follows: First, the position where the reference interval amount has advanced since the past singularity P1 is determined. Then, the position where the winding start threshold is subtracted from that position is set as the start position of the normal range R, and the position where the winding start threshold is added to that position is set as the end position of the normal range R. The winding start threshold is a value appropriately set according to the configuration of the winding unit 10, the properties of the yarn, etc. In this way, the unit control unit 11 sets the range between the start position and the end position as the normal range R of the winding start state. Furthermore, the normal range R is determined in units of yarn length or time together with the reference interval.

[0080] Furthermore, regarding the determination of the initial singularity, a normal range is established by advancing a reference interval relative to the maximum or minimum value that appears in the change of travel speed over time, and it is determined whether a maximum or minimum value exists within the normal range. If a maximum or minimum value exists within the normal range, the normal range is further advanced by the reference interval, and the same process is performed. If a maximum or minimum value exists within the normal range after repeated processing, it is determined to be a singularity, and the above process is then performed. If no maximum or minimum value exists within the normal range, the same process is performed on other maximum or minimum values, thereby determining it as a singularity.

[0081] When the reference interval is set as the traverse length, the length of the traverse length will differ between the initial traverse length (when the yarn 5 begins winding into the package 8) and the normal traverse length (average traverse length) after the start of winding. The initial traverse length can be a value measured by the pilot spindle and output to the unit control unit 11 of each take-up unit 10. The average traverse length can be updated from the initial traverse length based on the occurrence intervals of past singularities. As an update, for example, it can be calculated by averaging the occurrence intervals of the past four singularities. Furthermore, the reference interval can also be updated each time by periodically calculating the average of the occurrence intervals. In addition, the number of occurrence intervals used when updating the reference interval is not limited to four.

[0082] The unit control unit 11 sets an inference point P2 when the determined singularity does not exist within the normal range R. For example... Figure 5 As shown, the unit control unit 11 determines a maximum or minimum value that does not exist within the normal range R as an error point P3. In this case, the unit control unit 11 sets an inference point P2 within the normal range R. The unit control unit 11 determines a stepped winding abnormality when the number of times the inference point P2 is set meets the abnormality condition. Specifically, the unit control unit 11 determines a stepped winding abnormality when, within the normal range R where the first number (e.g., 4 times) is continuously set, the inference point P2 is set for a second number (e.g., 2 times). The second number is the threshold for determining a stepped winding abnormality. The first and second numbers are arbitrary numbers. Furthermore, the first number is greater than the second number. In addition, the error point P3 is not necessarily determined.

[0083] like Figure 6 As shown, for example, if the unit control unit 11 determines "0 (no abnormality)" when no inference point P2 is set even once during the first number of iterations, the lateral movement abnormality rate is "0 / 4". If the unit control unit 11 determines "△" when the inference point P2 is set once during the first number of iterations, the lateral movement abnormality rate is "1 / 4". If the unit control unit 11 determines "× (abnormality)" when the inference point P2 is set twice during the first number of iterations, the lateral movement abnormality rate is "2 / 4". Figure 6 In the determination results, "←" indicates the case where the normal singularity P1 is continuous. When an abnormality is determined in the unit control unit 11, for example... Figure 4 As shown, the intervals between the occurrences of singularities become shorter.

[0084] The unit control unit 11 calculates the length of the abnormal portion based on the inference point P2 when a stepped winding abnormality is determined. The unit control unit 11 calculates the length of the abnormal portion based on the lateral movement abnormality rate. Specifically, when a stepped winding abnormality is determined, the unit control unit 11 calculates the length of the abnormal portion as the length of the period during which the lateral movement abnormality rate is greater than "0". For example, in... Figure 6 In the example shown, the length of the abnormal portion is calculated as the length indicated by the arrow between the position where the lateral movement abnormality rate is determined to be "1 / 4" and the position where the lateral movement abnormality rate is determined to be "2 / 4". Alternatively, only the position where the lateral movement abnormality rate is determined to be "2 / 4" can be considered as the length of the abnormal portion. Specifically, the unit control unit 11 calculates the length of the abnormal portion based on the number of pulses (drum pulse count) corresponding to the rotation period of the drum 45. The unit control unit 11 causes the yarn loading capture member 20 to capture the abnormal portion. The yarn loading capture member 20 captures the abnormal portion of length calculated by the unit control unit 11.

[0085] If the unit control unit 11 determines that a stepped winding abnormality has occurred, it reports the occurrence of the abnormality. If the unit control unit 11 determines that a stepped winding abnormality has occurred, it outputs an abnormality signal indicating the stepped winding abnormality to the machine control device 2. The machine control device 2 then causes the display unit 4 to display the situation indicating the stepped winding abnormality.

[0086] [Rope winding anomaly]

[0087] Next, the detection method for a winding anomaly known as "ribbon winding" will be described in detail. For example... Figure 8 As shown in (b), the winding anomaly, known as strip winding, is an anomaly in which the yarn 5 is wound only in a portion of the package 8. For example, strip winding occurs because the yarn 5 does not enter the transverse groove 45a of the drum 45 after the splicing action performed by the splicing device 16 is completed.

[0088] The unit control unit 11 detects anomalies (hereinafter also referred to as "ribbon winding anomalies") related to the winding of the yarn 5 based on the traveling speed of the yarn 5 detected by the yarn monitoring device 17 (anomaly detection step). The unit control unit 11 detects ribbon winding anomalies for a predetermined time after the splicing operation of the splicing device 16 ends and the winding of the yarn 5 begins. The predetermined time is the time until the winding speed reaches a predetermined speed, or the time until the winding length of the yarn 5 reaches a predetermined length.

[0089] The unit control unit 11 determines the maximum and minimum values ​​that satisfy predetermined conditions in the variation of the travel speed over time, or in the variation of the speed ratio obtained by dividing the travel speed by the circumferential speed of the drum 45, as the first singularity and the second singularity, respectively. Then, it detects a strip winding abnormality based on the difference between the first singularity and the second singularity closest to it. Specifically, the unit control unit 11 determines a strip winding abnormality if the difference between the first singularity and the second singularity closest to it is below a threshold value. The threshold value is appropriately set according to the configuration of the winding unit 10, the properties of the yarn, etc. Furthermore, the methods for determining the maximum, minimum, first singularity, and second singularity are the same as those in the [winding abnormality of stepped winding].

[0090] like Figure 7 As shown in (a), when yarn 5 is normally wound into package 8, the difference between the first singularity and the second singularity is greater than a threshold. Figure 7 As shown in (b), in the event of a strip-like winding anomaly, the difference between the first singularity and the second singularity continuously falls below a threshold. The unit control unit 11 determines a strip-like winding anomaly when the number of times the difference between the first singularity and the second singularity falls below the threshold exceeds a predetermined number. Furthermore, even if the number of times the difference between the first singularity and the second singularity falls below the threshold occurs only once, an anomaly can still be determined. Furthermore, the "second singularity closest to the first singularity" can be the point immediately before or after the first singularity. Figure 7 any second singularity to the right and left of (a).

[0091] Furthermore, the unit control unit 11 also determines that a strip-shaped winding abnormality has occurred if the first singularity and / or the second singularity cannot be determined during the period of yarn length involved in the winding abnormality determination. Here, the situation where the first singularity and / or the second singularity cannot be determined refers to a situation where the travel speed stored in the storage unit is frequently updated, making it impossible to determine a maximum or / or minimum value. Since the first singularity and / or the second singularity cannot be determined, the difference between the first and second singularities cannot be calculated, thus it can be determined as an abnormality. Similarly, if the maximum or minimum value cannot be determined during the period of yarn length involved in the winding abnormality determination, it can also be determined that a strip-shaped winding abnormality has occurred. Here, "yarn length involved in the abnormality determination" refers to the yarn length of 1 to 4 traverse movements.

[0092] The unit control unit 11 calculates the length of the abnormal portion when a ribbon winding abnormality is determined. Specifically, the unit control unit 11 calculates the travel distance of the yarn 5 from the time the splicing action is performed in the splicing device 16 until the ribbon winding abnormality is determined, and sets this travel distance as the length of the abnormal portion. Specifically, the unit control unit 11 calculates the length of the abnormal portion based on the number of pulses (drum pulse count) corresponding to the rotation cycle of the drum 45. The unit control unit 11 causes the yarn feeding capture member 20 to capture the abnormal portion. The yarn feeding capture member 20 captures the abnormal portion of the length calculated by the unit control unit 11. The reason for capturing the travel distance of the yarn 5 from the time the splicing action is performed until the ribbon winding abnormality is determined is that, in the case of a ribbon winding abnormality, the yarn path is not in its normal position after the splicing action performed by the splicing device 16 ends. Therefore, it is necessary to capture the yarn after the splicing action ends.

[0093] The unit control unit 11 reports the occurrence of a strip winding abnormality when it determines that a strip winding abnormality has occurred. The unit control unit 11 also outputs an abnormality signal indicating a strip winding abnormality to the machine control device 2 when a strip winding abnormality is determined to be occurring. The machine control device 2 then causes the display unit 4 to display the occurrence of the strip winding abnormality.

[0094] As explained above, in the automatic winding machine 1 of this embodiment, the unit control unit 11 determines the maximum or minimum value that becomes an oddity from the occurrence of maximum or minimum values. Thus, by observing the changes in maximum or minimum values ​​over time, which vary in size, the maximum or minimum value required for anomaly detection can be determined. Then, based on the determined interval of the oddity occurrence, the winding anomaly of the yarn 5 (step-winding winding anomaly) can be detected with high precision.

[0095] In the automatic winding machine 1 of this embodiment, the unit control unit 11 sets a normal range R. If the determined maximum or minimum value does not exist within the normal range R, an inference point P2 is set within the normal range R. If the number of times the inference point P2 is set meets the abnormality condition, an abnormality is determined. Sometimes, due to reasons other than yarn 5 take-up abnormalities (such as poor signal processing), a situation may arise where there is temporarily no singularity within the normal range R. In this case, since the absence of yarn 5 take-up abnormalities and the absence of singularities are also temporary, it is not necessary to stop the yarn 5 take-up processing abnormality.

[0096] The automatic winding machine 1 of this embodiment includes a yarn-catching member 20 for catching abnormal portions of the yarn 5. The unit control unit 11 calculates the length of the abnormal portion based on an inference point P2. The yarn-catching member 20 catches the abnormal portion of the length calculated by the unit control unit 11. In this configuration, the yarn 5 wound on the package 8 after an abnormality occurs can be caught appropriately. Therefore, in the automatic winding machine 1, the winding of the yarn 5 can be restarted after an abnormality occurs.

[0097] In the automatic winding machine 1 of this embodiment, the unit control unit 11 determines a first singularity and a second singularity from the maximum and minimum values ​​that appear in the change of the speed ratio over time, and detects anomalies based on the difference between the first singularity and the second singularity. Therefore, the automatic winding machine 1 can detect winding anomalies of the strip winding. Thus, the automatic winding machine 1 can detect winding anomalies of the yarn 5 with high precision.

[0098] In the automatic winding machine 1 of this embodiment, the unit control unit 11 determines an abnormality when the difference between the first singularity and the second singularity is below a threshold. Furthermore, the unit control unit 11 determines an abnormality when the first singularity and / or the second singularity cannot be determined. This configuration enables high-precision detection of winding abnormalities in the strip winding process.

[0099] In the automatic winding machine 1 of this embodiment, the drum 45 may also have a transverse groove 45a formed on its outer peripheral surface. In the configuration where the transverse groove 45a is formed on the drum 45, a strip-shaped winding may occur because the yarn 5 does not enter the transverse groove 45a. Therefore, the configuration of the automatic winding machine 1, which has a transverse groove 45a formed on the drum 45, is particularly effective in detecting abnormal winding of the strip-shaped winding with high precision.

[0100] The automatic winding machine 1 of this embodiment includes a splicing device 16. When the yarn 5 is disconnected between the yarn supply unit 18 and the take-up unit 30, the splicing device 16 performs a splicing operation to make the yarn 5 continuous. The unit control unit 11 calculates the distance the yarn has traveled from the time the splicing operation is performed in the splicing device 16 until the abnormality is detected, in case of an abnormality. The yarn capture member 20 captures the yarn 5 as the length of the abnormal portion based on the travel distance. In this configuration, the yarn 5 wound on the package 8 after an abnormality occurs can be captured appropriately. Therefore, in the automatic winding machine 1, the take-up of the yarn 5 can be restarted after an abnormality occurs.

[0101] The automatic winding machine 1 of this embodiment includes a display unit 4, which reports the occurrence of an abnormality when an abnormality is detected by the unit control unit 11. In this configuration, the operator and others can be notified of the occurrence of an abnormality.

[0102] The embodiments of the present invention have been described above, but the present invention is not necessarily limited to the above embodiments, and various modifications can be made without departing from its spirit.

[0103] In the above embodiment, the following configuration is described as an example: in the machine height direction, the take-up bobbin 7 and the package 8 are positioned above the yarn supply bobbin 6 in the vertical direction, so that the yarn 5 travels from the bottom to the top. However, the take-up unit 10 may also be configured such that the yarn 5 travels from the top to the bottom. In this case, it is preferable that "bottom" in the description of this application can be replaced with "top" or "(upstream in the yarn travel direction)," and "top" can be replaced with "bottom" or "(downstream in the yarn travel direction)."

[0104] In the above embodiment, the winding device 30 with a drum 45 was described as an example. However, the winding device 30 is not limited to the above configuration. For example, the winding device may also include a traverse device, which has a traverse yarn guide, a drive motor, a guide plate, and a traverse fulcrum. The traverse yarn guide engages with the yarn 5 wound on the package 8. The drive motor causes the traverse yarn guide to reciprocate in the package width direction. The traverse yarn guide guides the yarn 5 while reciprocating, so that the yarn 5 wound on the package 8 traverses. The guide plate guides the traversely moving yarn 5. The traverse fulcrum engages with the yarn 5 upstream of the guide plate in the direction of yarn 5 travel.

[0105] In the above embodiment, the unit control unit 11 was described as an example of functioning as an anomaly detection unit. However, the yarn monitoring device 17 could also function as an anomaly detection unit. In this configuration, the yarn monitoring device 17 does not output speed data related to the travel speed of the yarn 5 to the unit control unit 11. Furthermore, in this case, drum pulses are input to the yarn monitoring device 17. Therefore, the yarn monitoring device 17 calculates the length of the abnormal portion based on the number of drum pulses.

[0106] In the above embodiment, the yarn monitoring device 17 was described as an example, having both a speed detection unit for detecting the travel speed of the yarn 5 and a function for detecting yarn defects. However, the yarn monitoring device 17 may also only have the function of a speed detection unit for detecting the travel speed of the yarn 5. Alternatively, in addition to the yarn monitoring device 17 for detecting yarn defects, a speed detection device may be provided that only has the function of a speed detection unit for detecting the travel speed of the yarn 5.

[0107] In the above embodiment, the following method is described as an example: the unit control unit 11 determines the minimum value that is a singularity from the minimum values ​​that appear in the change of the speed ratio obtained by dividing the travel speed by the circumferential speed of the drum 45 over time, and detects the stepped winding abnormality based on the occurrence interval of the singularity. However, the unit control unit 11 may also determine the maximum value that is a singularity from the maximum values ​​that appear in the change of the travel speed over time, and detect the stepped winding abnormality based on the occurrence interval of the singularity. Alternatively, the singularity may be determined from both the maximum and minimum values ​​to detect the abnormality.

[0108] In the above embodiment, the following method is described as an example: the unit control unit 11 determines the minimum value that is a singularity from the minimum values ​​that appear in the change of travel speed or speed ratio over time, and detects the stepped winding abnormality based on the occurrence interval of the singularity. However, the unit control unit 11 may also determine the maximum value that is a singularity from the maximum values ​​that appear in the change of travel speed or speed ratio over time, and detect the stepped winding abnormality based on the occurrence interval of the singularity. Furthermore, the abnormality can be detected by determining the singularity from both the maximum and minimum values.

[0109] In the above embodiment, the following method is described as an example: the unit control unit 11 determines the maximum and minimum values ​​of the speed ratio obtained by dividing the travel speed by the circumferential speed of the drum 45 over time, and detects the strip winding abnormality based on the difference between the maximum value and the minimum value closest to the maximum value. However, the unit control unit 11 may also determine the maximum and minimum values ​​of the travel speed over time, and detect the strip winding abnormality based on the difference between the maximum value and the minimum value closest to the maximum value.

[0110] In the above embodiment, the method by which the unit control unit 11 calculates the length of the abnormal portion based on the number of pulses (drum pulse number) of the cycle corresponding to the rotation of the drum 45 has been described as an example. However, the unit control unit 11 may also calculate the length of the abnormal portion based on the travel speed of the yarn 5.

[0111] In the above embodiment, the following method was described as an example: the take-up device 30 has a drum 45, which rotates while in contact with the outer peripheral surface of the roll 8, thereby rotating the roll 8. However, it is also possible to directly drive the roll 8 to rotate. In this case, in a configuration that includes a friction roller that rotates in contact with the roll 8, the circumferential speed of the roll 8 can be calculated based on the rotational speed of the friction roller. Furthermore, in a configuration that directly drives the roll 8, the circumferential speed of the roll 8 can be calculated based on the rotational speed of the drive shaft of the roll 8 or the rotational speed of the drive motor of the roll 8.

[0112] In the above embodiment, the following method is described as an example: the yarn monitoring device 17 detects the travel speed of the yarn 5 moving from the yarn supply bobbin 6 toward the take-up device 30, and the unit control unit 11 detects any abnormalities related to the take-up of the yarn 5 based on the travel speed detected by the yarn monitoring device 17. However, the travel speed of the yarn 5 can also be obtained based on the tension of the yarn 5. The travel speed of the yarn 5 can also change as the yarn moves from one end of the package to the other. In addition, the tension also changes as the yarn moves from one end of the package to the other. That is, it is known that the change in travel speed is related to the tension. Therefore, by pre-calculating and storing the correlation between travel speed and tension, the unit control unit 11 can calculate (predict) the travel speed of the yarn 5 based on the tension measurement signal output from the tension detection device 15. The correlation between travel speed and tension can be stored in tabular form or in a calculation formula.

[0113] In the above embodiment, the following method is described as an example: the unit control unit 11 detects abnormalities related to the take-up of the yarn 5 based on the travel speed detected by the yarn monitoring device 17. However, the unit control unit 11 may also detect abnormalities related to the take-up of the yarn 5 based on the tension of the yarn 5. The unit control unit 11 detects abnormalities related to the take-up of the yarn 5 based on the tension (tension measurement signal) of the yarn 5 detected by the tension detection device 15.

[0114] The unit control unit 11 determines the maximum or minimum value that becomes an oddity from the maximum or minimum values ​​that appear in the tension over time, and detects step-winding abnormalities based on the interval between the occurrence of oddities. In this configuration, by determining the maximum or minimum value that becomes an oddity from the occurrence of maximum or minimum values, it is possible to determine the maximum or minimum value required for abnormality detection from the time-varying maximum or minimum values ​​of varying magnitudes. Then, based on the frequency of occurrence of the determined oddities, the winding abnormality of the yarn 5 can be detected with high precision. Furthermore, in terms of tension, abnormalities can also be detected based on the difference between the first oddity and the second oddity. In addition, the methods for obtaining the maximum and minimum values ​​in tension and the methods for determining oddities can be obtained by performing the same processing as the processing of the travel speed.

[0115] As a method for determining the maximum and minimum values, the following situation is described: the storage unit stores the maximum and minimum values ​​of the travel speed, and the maximum and minimum values ​​are determined based on the yarn positions when the maximum and minimum travel speeds were stored, and the yarn positions when the new travel speed is obtained. However, for example, it is also possible to store the travel speed of multiple traverse movements, and determine the maximum and minimum values ​​based on the stored travel speeds. In this case, the maximum and minimum values ​​can be determined by comparing the travel speed at the obtained moment with the travel speeds of its surrounding areas.

[0116] As an anomaly detection method, a method based on a baseline interval for anomaly detection has been described. However, anomalies can also be detected based on changes in the occurrence interval of singularities. For example, anomaly detection can be performed when the new occurrence interval differs from the immediately preceding occurrence interval by a value greater than a specified value.

[0117] As a method for anomaly detection, a method of setting inference points within the normal range R has been described. However, it is not always necessary to set inference points. For example, anomaly detection can also be performed by applying the same processing as inference points based on the number of times that no maximum or minimum value exists within the normal range R.

Claims

1. A yarn winding machine, comprising: The yarn supply section is capable of supplying yarn; The take-up section causes the yarn supplied from the yarn supply section to move laterally and take up the yarn to form a package. The speed acquisition unit acquires the travel speed of the yarn as it travels from the yarn supply unit toward the take-up unit. The anomaly detection unit detects anomalies related to the winding of the yarn based on the travel speed obtained by the speed acquisition unit; and Setting unit, setting reference interval. The aforementioned anomaly detection unit identifies a singularity as either a maximum or minimum value that satisfies a predetermined condition among the maximum or minimum values ​​that occur during the change of the travel speed over time, or a singularity as either a maximum or minimum value that satisfies a predetermined condition among the maximum or minimum values ​​that occur during the change of the speed ratio obtained by dividing the travel speed by the circumferential speed of the package or the circumferential speed of the roller in contact with the package over time. The anomalies mentioned above are detected based on the occurrence intervals of the singularities. As a condition specified above, the maximum or minimum value appearing in the above reference interval is determined as the above singularity; and the above reference interval is determined based on the specified yarn length wound by the above take-up section when the yarn is moved from the end of the package to the end by traversing the yarn through the above take-up section.

2. The yarn winding machine as described in claim 1, wherein, The aforementioned setting unit sets a normal range for points that have advanced the aforementioned reference interval amount from the specified singularity. The aforementioned anomaly detection unit determines the aforementioned singularity by identifying the maximum or minimum value within the aforementioned normal range that satisfies the aforementioned specified conditions.

3. The yarn winding machine as described in claim 2, wherein, The aforementioned anomaly detection unit determines an anomaly when, within the normal range of a quantity that has been continuously set to a first number, the number of times the abnormal condition of no maximum or minimum value within the normal range exceeds the second number.

4. The yarn winding machine as described in claim 2, wherein, The above-mentioned anomaly detection department is, When there are no maximum or minimum values ​​within the above-mentioned normal range, an inference point is set within the above-mentioned normal range. Within the normal range of the quantity for which the first number has been continuously set, if the abnormal condition of the number of times the above-mentioned inference point has been set exceeds the second number is met, it is determined to be the above-mentioned abnormality.

5. The yarn winding machine as described in claim 4, wherein, It includes a capturing unit that captures abnormal portions contained in the yarn forming the aforementioned package. The anomaly detection unit calculates the length of the anomaly based on the aforementioned inference points. The aforementioned capturing unit captures the aforementioned abnormal portion of the aforementioned length calculated by the aforementioned abnormality detection unit from the aforementioned roll.

6. The yarn winding machine as described in claim 1, wherein, The aforementioned setting unit updates the aforementioned reference interval based on the aforementioned occurrence interval from the past.

7. The yarn winding machine as described in claim 2, wherein, The aforementioned setting unit updates the aforementioned reference interval based on the aforementioned occurrence interval from the past.

8. The yarn winding machine as described in claim 3, wherein, The aforementioned setting unit updates the aforementioned reference interval based on the aforementioned occurrence interval from the past.

9. The yarn winding machine as described in claim 4, wherein, The aforementioned setting unit updates the aforementioned reference interval based on the aforementioned occurrence interval from the past.

10. The yarn winding machine as described in claim 5, wherein, The aforementioned setting unit updates the aforementioned reference interval based on the aforementioned occurrence interval from the past.

11. The yarn take-up machine as described in any one of claims 1 to 10, comprising: The storage unit stores the maximum or minimum value of the aforementioned travel speed; and The updating unit, when the storage unit stores a maximum value, compares the new travel speed obtained by the speed acquisition unit with the maximum value stored in the storage unit. If the new travel speed is greater, the maximum value stored in the storage unit is updated to the new maximum value. Alternatively, when the storage unit stores a minimum value, the updating unit compares the new travel speed obtained by the speed acquisition unit with the minimum value stored in the storage unit. If the new travel speed is less, the minimum value stored in the storage unit is updated to the new minimum value. The aforementioned anomaly detection unit determines the maximum or minimum value stored in the storage unit as a maximum or minimum value when a predetermined difference exists between the first position of the yarn when the speed acquisition unit obtains a new travel speed and the second position of the yarn when the update unit updates the maximum or minimum value.

12. The yarn take-up machine according to any one of claims 1 to 10, wherein, The aforementioned anomaly detection unit determines an anomaly when the aforementioned interval has changed.

13. The yarn winding machine as described in claim 11, wherein, The aforementioned anomaly detection unit determines an anomaly when the aforementioned interval has changed.

14. The yarn take-up machine according to any one of claims 1 to 10, wherein, The system includes a tension detection unit that detects the tension of the yarn as it travels from the yarn supply section toward the take-up section. The speed acquisition unit obtains the travel speed based on the tension of the yarn detected by the tension detection unit.

15. The yarn winding machine as described in claim 11, wherein, The system includes a tension detection unit that detects the tension of the yarn as it travels from the yarn supply section toward the take-up section. The speed acquisition unit obtains the travel speed based on the tension of the yarn detected by the tension detection unit.

16. The yarn winding machine as described in claim 12, wherein, The system includes a tension detection unit that detects the tension of the yarn as it travels from the yarn supply section toward the take-up section. The speed acquisition unit obtains the travel speed based on the tension of the yarn detected by the tension detection unit.

17. The yarn winding machine as described in claim 13, wherein, The system includes a tension detection unit that detects the tension of the yarn as it travels from the yarn supply section toward the take-up section. The speed acquisition unit obtains the travel speed based on the tension of the yarn detected by the tension detection unit.

18. A yarn winding machine, comprising: The yarn supply section is capable of supplying yarn; The take-up section causes the yarn supplied from the yarn supply section to move laterally and take up the yarn to form a package. The speed acquisition unit acquires the travel speed of the yarn as it travels from the yarn supply unit toward the take-up unit. The anomaly detection unit detects anomalies related to the winding of the yarn based on the yarn's travel speed obtained by the speed acquisition unit; and The setting unit sets the reference interval, and the aforementioned anomaly detection unit is... The maximum and minimum values ​​that satisfy the specified conditions among the maximum and minimum values ​​appearing in the time variation of the aforementioned travel speed are respectively determined as the first singularity and the second singularity. Alternatively, the maximum and minimum values ​​that satisfy the specified conditions among the maximum and minimum values ​​appearing in the time variation of the speed ratio obtained by dividing the aforementioned travel speed by the circumferential speed of the aforementioned package or the circumferential speed of the roller in contact with the aforementioned package are respectively determined as the first singularity and the second singularity. As a condition for the above-mentioned definition, the maximum and minimum values ​​occurring within the above-mentioned reference interval are respectively defined as the first singularity and the second singularity; and the reference interval is determined based on a predetermined yarn length taken up by the take-up section when the yarn is moved from the end of the package to the end by traversing the yarn through the take-up section. Anomalies are detected based on the difference between the first singularity and the second singularity closest to it. If the difference between the first singularity and the second singularity closest to the first singularity is below a threshold, the above-mentioned anomaly is determined.

19. The yarn winding machine as described in claim 18, wherein, The aforementioned setting unit sets a normal range for points that have deviated from the aforementioned singularity by the aforementioned reference interval. The aforementioned anomaly detection unit determines the maximum and minimum values ​​within the aforementioned normal range as the first singularity and the second singularity, respectively, based on the conditions specified above.

20. The yarn winding machine as described in claim 18, comprising: The storage unit stores the maximum and minimum values ​​of the aforementioned travel speed; and The updating unit compares the new travel speed obtained by the speed acquisition unit with the maximum and minimum values ​​stored in the storage unit. If the new travel speed is greater than the maximum value or less than the minimum value, the maximum or minimum value stored in the storage unit is updated to the new maximum or minimum value. The aforementioned anomaly detection unit determines the maximum or minimum value stored in the storage unit as a maximum or minimum value when a predetermined difference exists between the first position of the yarn when the speed acquisition unit obtains a new travel speed and the second position of the yarn when the update unit updates the maximum or minimum value.

21. The yarn winding machine as described in claim 19, comprising: The storage unit stores the maximum and minimum values ​​of the aforementioned travel speed; and The updating unit compares the new travel speed obtained by the speed acquisition unit with the maximum and minimum values ​​stored in the storage unit. If the new travel speed is greater than the maximum value or less than the minimum value, the maximum or minimum value stored in the storage unit is updated to the new maximum or minimum value. The aforementioned anomaly detection unit determines the maximum or minimum value stored in the storage unit as a maximum or minimum value when a predetermined difference exists between the first position of the yarn when the speed acquisition unit obtains a new travel speed and the second position of the yarn when the update unit updates the maximum or minimum value.

22. The yarn take-up machine as described in any one of claims 18 to 21, wherein, The aforementioned anomaly detection unit determines an anomaly when it is impossible to determine the first singularity and / or the second singularity during the period when the yarn length related to the anomaly determination has been wound.

23. The yarn take-up machine as described in any one of claims 18 to 21, wherein, The aforementioned anomaly detection unit determines an anomaly when the maximum and / or minimum values ​​cannot be determined during the period when the yarn length related to the anomaly determination is wound.

24. The yarn take-up machine as described in any one of claims 18 to 21, comprising: The splicing device performs a splicing operation to make the yarn continuous when the yarn is disconnected between the yarn supply section and the yarn take-up section; and The capturing section captures any abnormal portions contained in the yarn forming the aforementioned package. The aforementioned anomaly detection unit, upon detecting the aforementioned anomaly, calculates the distance the yarn has traveled from the moment the splicing operation was performed in the splicing device until the anomaly was detected. The aforementioned capturing unit captures the abnormal portion from the roll by setting the travel distance to the length of the abnormal portion.

25. The yarn winding machine as described in claim 22, comprising: The splicing device performs a splicing operation to make the yarn continuous when the yarn is disconnected between the yarn supply section and the yarn take-up section; and The capturing section captures any abnormal portions contained in the yarn forming the aforementioned package. The aforementioned anomaly detection unit, upon detecting the aforementioned anomaly, calculates the distance the yarn has traveled from the moment the splicing operation was performed in the splicing device until the anomaly was detected. The aforementioned capturing unit captures the abnormal portion from the roll by setting the travel distance to the length of the abnormal portion.

26. The yarn winding machine as described in claim 23, comprising: The splicing device performs a splicing operation to make the yarn continuous when the yarn is disconnected between the yarn supply section and the yarn take-up section; and The capturing section captures any abnormal portions contained in the yarn forming the aforementioned package. The aforementioned anomaly detection unit, upon detecting the aforementioned anomaly, calculates the distance the yarn has traveled from the moment the splicing operation was performed in the splicing device until the anomaly was detected. The aforementioned capturing unit captures the abnormal portion from the roll by setting the travel distance to the length of the abnormal portion.

27. The yarn take-up machine as described in any one of claims 18 to 21, wherein, The system includes a tension detection unit that detects the tension of the yarn as it travels from the yarn supply section toward the take-up section. The speed acquisition unit obtains the travel speed based on the tension of the yarn detected by the tension detection unit.

28. The yarn winding machine as described in claim 22, wherein, The system includes a tension detection unit that detects the tension of the yarn as it travels from the yarn supply section toward the take-up section. The speed acquisition unit obtains the travel speed based on the tension of the yarn detected by the tension detection unit.

29. The yarn winding machine as described in claim 23, wherein, The system includes a tension detection unit that detects the tension of the yarn as it travels from the yarn supply section toward the take-up section. The speed acquisition unit obtains the travel speed based on the tension of the yarn detected by the tension detection unit.

30. The yarn winding machine as described in claim 24, wherein, The system includes a tension detection unit that detects the tension of the yarn as it travels from the yarn supply section toward the take-up section. The speed acquisition unit obtains the travel speed based on the tension of the yarn detected by the tension detection unit.

31. The yarn winding machine as described in claim 25, wherein, The system includes a tension detection unit that detects the tension of the yarn as it travels from the yarn supply section toward the take-up section. The speed acquisition unit obtains the travel speed based on the tension of the yarn detected by the tension detection unit.

32. The yarn winding machine as described in claim 26, wherein, The system includes a tension detection unit that detects the tension of the yarn as it travels from the yarn supply section toward the take-up section. The speed acquisition unit obtains the travel speed based on the tension of the yarn detected by the tension detection unit.

33. A yarn winding machine, comprising: The yarn supply section is capable of supplying yarn; The take-up section causes the yarn supplied from the yarn supply section to move laterally and take up the yarn to form a package. The tension detection unit detects the tension of the yarn as it travels from the yarn supply unit toward the take-up unit. The anomaly detection unit detects anomalies related to the winding of the yarn based on the tension of the yarn detected by the tension detection unit. as well as Setting unit, setting reference interval. The above-mentioned anomaly detection department is, The maximum or minimum value that meets the specified conditions among the maximum or minimum values ​​that appear in the above tension change over time is determined as a singularity. The above anomalies are detected based on the occurrence interval of the singularities mentioned above; As a condition specified above, the maximum or minimum value appearing in the above reference interval is determined as the above singularity; and the above reference interval is determined based on the specified yarn length wound by the above take-up section when the yarn is moved from the end of the package to the end by traversing the yarn through the above take-up section.

34. A yarn winding machine, comprising: The yarn supply section is capable of supplying yarn; The take-up section causes the yarn supplied from the yarn supply section to move laterally and take up the yarn to form a package. The tension detection unit detects the tension of the yarn as it travels from the yarn supply unit toward the take-up unit. The anomaly detection unit detects anomalies related to the winding of the yarn based on the tension of the yarn detected by the tension detection unit. as well as The setting unit sets the reference interval, and the aforementioned anomaly detection unit is... The maximum and minimum values ​​that satisfy the specified conditions among the maximum and minimum values ​​that appear in the above tension change over time are respectively determined as the first singularity and the second singularity; As a condition for the above-mentioned definition, the maximum and minimum values ​​occurring within the above-mentioned reference interval are respectively defined as the first singularity and the second singularity; and the reference interval is determined based on a predetermined yarn length taken up by the take-up section when the yarn is moved from the end of the package to the end by traversing the yarn through the take-up section. The anomaly is detected based on the difference between the first singularity and the second singularity closest to it. If the difference between the first singularity and the second singularity closest to the first singularity is below a threshold, the above-mentioned anomaly is determined.

35. A method for detecting take-up defects, performed in a yarn winding machine having a yarn supply section capable of supplying yarn and a take-up section that traverses the yarn supplied from the yarn supply section to wind it up and form a package, comprising: The speed acquisition step acquires the travel speed of the yarn traveling from the yarn supply section toward the take-up section. The anomaly detection step detects anomalies related to the winding of the yarn based on the travel speed obtained in the speed acquisition step. as well as Set the steps, set the reference interval. In the above anomaly detection steps, The maximum or minimum value among the maximum or minimum values ​​that occur in the time-varying travel speed described above, satisfying a specified condition, is determined as a singularity. Alternatively, the maximum or minimum value among the maximum or minimum values ​​that occur in the time-varying speed ratio obtained by dividing the travel speed by the circumferential speed of the package or the circumferential speed of the roller in contact with the package described above, satisfying a specified condition, is determined as a singularity. Anomalies are detected based on the occurrence intervals of the aforementioned singularities. As a condition specified above, the maximum or minimum value appearing in the above reference interval is determined as the above singularity; and the above reference interval is determined based on the specified yarn length wound by the above take-up section when the yarn is moved from the end of the package to the end by traversing the yarn through the above take-up section.

36. A method for detecting take-up defects, performed in a yarn winding machine having a yarn supply section capable of supplying yarn and a take-up section that traverses the yarn supplied from the yarn supply section to wind it up and form a package, comprising: The speed acquisition step acquires the travel speed of the yarn traveling from the yarn supply section toward the take-up section. The anomaly detection step detects anomalies related to the winding of the yarn based on the travel speed of the yarn obtained in the speed acquisition step. as well as Set the steps, set the reference interval. In the above anomaly detection steps, The maximum and minimum values ​​that satisfy the specified conditions among the maximum and minimum values ​​appearing in the time variation of the aforementioned travel speed are respectively determined as the first singularity and the second singularity. Alternatively, the maximum and minimum values ​​that satisfy the specified conditions among the maximum and minimum values ​​appearing in the time variation of the speed ratio obtained by dividing the aforementioned travel speed by the circumferential speed of the aforementioned roll or the circumferential speed of the roller in contact with the aforementioned roll are respectively determined as the first singularity and the second singularity. As a condition for the above-mentioned definition, the maximum and minimum values ​​occurring within the above-mentioned reference interval are respectively defined as the first singularity and the second singularity; and the reference interval is determined based on a predetermined yarn length taken up by the take-up section when the yarn is moved from the end of the package to the end by traversing the yarn through the take-up section. The anomaly is detected based on the difference between the first singularity and the second singularity closest to it. If the difference between the first singularity and the second singularity closest to the first singularity is below a threshold, the above-mentioned anomaly is determined.

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