Title of the invention: Thread winder and thread winding method
Technical field
[0001]
　The present invention mainly relates to a thread winder that controls thread winding according to a control package diameter.
Background technology
[0002]
　Conventionally, there has been known a thread winder that calculates a package diameter by calculation and controls the winding of a thread by using the package diameter obtained by this calculation. The thread winder of Patent Document 1 detects the peripheral speed of the package and the rotation speed of the package with a sensor, and calculates the average outer shape of the package based on these. Patent Document 1 describes that the driving point of the package is calculated by using the package reference value which is the average outer shape of the package calculated in this way.
Prior art literature
Patent documents
[0003]
Patent Document 1: Japanese Unexamined Patent Publication No. 2014-40325
Outline of the invention
Problems to be solved by the invention
[0004]
　However, Patent Document 1 does not describe how to update the package reference value. For example, when the package diameter obtained by calculation is updated as it is as the package reference value, and the average outer shape of the package changes significantly due to the influence of sensor detection error and noise, the drive point of the package is calculated accordingly. Therefore, the control content may be inappropriate. It should be noted that there is a similar problem not only in the calculation of the drive point of the package but also in other control related to the winding of the yarn.
[0005]
　The present invention has been made in view of the above circumstances, and a main object thereof is to prevent a sudden change in the control content in a thread winder that controls thread winding according to a package diameter. It is to provide a possible configuration.
Means and effects to solve problems
[0006]
　The problem to be solved by the present invention is as described above, and next, the means for solving this problem and its effect will be described.
[0007]
　According to the first aspect of the present invention, a bobbin winder having the following configuration is provided. That is, this thread winder includes a winding unit, a detecting unit, and a control unit. The take-up section winds the yarn to form a package. The detection unit detects a value used for calculating the package diameter. The control unit calculates an calculation package diameter which is a package diameter based on a value detected by the detection unit. The control unit updates the control package diameter, which is the package diameter used for controlling the winding of the yarn, based on the increase in the calculation package diameter. The control unit calculates an increase threshold value whose value changes based on at least one of the thread thickness and the control package diameter. When the value obtained by subtracting the control package diameter from the calculation package diameter exceeds the increase threshold value, the control unit increases the control package diameter by the amount corresponding to the increase threshold value.
[0008]
　As a result, by setting an increase threshold value for updating the control package diameter, it is possible to prevent a sudden change in the control content of the winding of the yarn. In particular, the effect of updating the control package diameter differs depending on the thread thickness or the control package diameter. Therefore, the control package diameter can be appropriately updated by setting the increase threshold value based on these.
[0009]
　The above-mentioned thread winder preferably has the following configuration. That is, the minimum increase threshold value and the maximum increase threshold value are defined as the increase threshold value calculated by the control unit. The control unit calculates the increase threshold value so as to be equal to or more than the minimum increase threshold value and not more than or equal to the maximum increase threshold value.
[0010]
　As a result, it is possible to prevent the under- or excessive increase threshold value from being calculated and applied, so that the control package diameter can be updated more appropriately.
[0011]
　In the thread winder, it is preferable that the control unit calculates the increase threshold value whose value changes based on both the thread thickness and the control package diameter.
[0012]
　As a result, the threshold value changes based on both of the two values ​​related to the magnitude of the influence of the update of the control package diameter, so that the control package diameter can be updated more appropriately.
[0013]
　In the thread winder, it is preferable that the control unit calculates the initial increase threshold value, which is the increase threshold value applied when the control package diameter is the minimum, based on the thread thickness.
[0014]
　As a result, the initial increase threshold can be calculated by a simple process.
[0015]
　In the thread winder, the control unit preferably calculates the control package diameter when the increase threshold value matches the minimum increase threshold value based on the thread thickness.
[0016]
　Thereby, the control package diameter when the increase threshold value matches the minimum increase threshold value can be calculated by a simple process.
[0017]
　In the thread winder, the control unit uses the control unit to perform the initial increase threshold value, the control package diameter at the initial increase threshold value, the minimum increase threshold value, and the control package at the minimum increase threshold value. The correspondence between the increase threshold value and the control package diameter is calculated based on the diameter, and the correspondence relationship includes a portion where the increase threshold value linearly changes as the control package diameter increases. Is preferable.
[0018]
　As a result, the correspondence between the increase threshold value and the control package diameter can be calculated by a simple process of finding two points on the coordinate axes and finding a straight line passing through them.
[0019]
　In the thread winder, the control unit calculates the increase threshold value at least based on the thread thickness. The minimum increase threshold is preferably constant regardless of the thread thickness.
[0020]
　This makes it unnecessary to calculate the minimum increase threshold value according to the thread thickness, which simplifies the process.
[0021]
　In the thread winder, it is preferable that the control unit calculates the thread thickness based on the input thread count, and calculates the increase threshold value based on the calculated thread thickness.
[0022]
　As a result, the operator does not have to directly input the thread thickness, so that the operator's labor can be reduced.
[0023]
　The above-mentioned thread winder preferably has the following configuration. That is, this bobbin winder includes a plurality of winding units and a control device. The control device collectively sets the plurality of winding units. The control device calculates the yarn thickness based on the input yarn count, and transmits the calculated yarn thickness to the respective control units of the plurality of winding units.
[0024]
　As a result, the thread thickness can be set for a plurality of winding units simply by inputting the thread count on the control device side, so that the operator's work can be reduced.
[0025]
　In the thread winder, the control unit does not perform a process of reducing the control package diameter even when the calculation package diameter is smaller than the control package diameter, and the control package diameter is not reduced. It is preferable not to change.
[0026]
　As a result, it is possible to prevent the winding control from becoming inappropriate as the diameter of the control package decreases.
[0027]
　According to the second aspect of the present invention, the following thread winding method is provided. That is, this thread winding method includes a calculation step, an update step, and a calculation step. In the calculation step, a calculation package diameter, which is a package diameter based on the detected value, is calculated. In the updating step, the control package diameter, which is the package diameter used for controlling the winding of the yarn, is updated based on the increase in the calculated package diameter. In the calculation step, an increase threshold value in which the value changes is calculated based on at least one of the thread thickness and the control package diameter. In the update step, when the value obtained by subtracting the control package diameter from the calculation package diameter exceeds the increase threshold value, the control package diameter is increased by the amount corresponding to the increase threshold value.
[0028]
　As a result, by setting an increase threshold value for updating the control package diameter, it is possible to prevent the control of yarn winding from suddenly changing. In particular, the magnitude of the effect of updating the control package diameter differs depending on the thread thickness or the control package diameter. Therefore, the control package diameter can be appropriately updated by setting the increase threshold value based on these.
A brief description of the drawing
[0029]
FIG. 1 is a front view of an automatic winder according to an embodiment of the present invention.
FIG. 2 is a front view and a block diagram of the thread winding unit.
[Fig. 3] A graph illustrating a process of controlling a twill swing width based on a control package diameter.
FIG. 4 is a flowchart showing a process of updating the control package diameter based on an increase threshold value.
FIG. 5 is a graph showing the correspondence between the thread thickness and the control package diameter and the increase threshold value.
FIG. 6 is a graph showing another example of the correspondence between the thread thickness and the control package diameter and the increase threshold value.
Mode for carrying out the invention
[0030]
　Next, an embodiment of the present invention will be described with reference to the drawings. In addition, in this specification, "upstream" and "downstream" mean upstream and downstream in the traveling direction of the yarn at the time of winding.
[0031]
　As shown in FIG. 1, the automatic winder (thread winder) 1 includes a plurality of thread winding units 10 arranged side by side, a ball lifting device 60, and a machine stand control device (control device) 90. ..
[0032]
　Each thread winding unit 10 winds the thread 20 unwound from the thread feeding bobbin 21 on a cone-shaped winding tube 22 supported by a cradle (winding tube support portion) 23, and winds the cone. The shaped package 30 is formed. The cradle 23 includes a small-diameter side support portion that rotatably supports the small-diameter side end portion of the take-up pipe 22, and a large-diameter side support portion that rotatably supports the large-diameter side end portion of the take-up pipe 22. have. The thread winding unit 10 may have a configuration in which the thread 20 is wound around a cylindrical winding tube 22 to form a cheese-shaped package 30.
[0033]
　When the package 30 is fully wound in each thread winding unit 10, the ball lifting device 60 travels to the position of the thread winding unit 10. In the thread winding unit 10, the ball lifting device 60 removes the fully wound package 30 from the cradle 23 and supplies a winding tube 22 in which the thread 20 is not wound.
[0034]
　The machine base control device 90 includes a machine base input unit 91 and a machine base display unit 92. The machine base input unit 91 can collectively set each thread winding unit 10 by the operator inputting a predetermined set value or selecting an appropriate control method. The machine stand display unit 92 can display a set value input screen, a winding status of the thread 20 of each thread winding unit 10, the content of the trouble that has occurred, and the like.
[0035]
　Next, the configuration of the bobbin winding unit 10 will be specifically described with reference to FIG. As shown in FIG. 2, each thread winding unit 10 includes a winding unit main body 17 and a unit control unit (control unit) 51.
[0036]
　The unit control unit 51 includes, for example, an arithmetic unit such as a CPU, a RAM, a ROM, an I / O port, and a communication port. A program for controlling each part of the winding unit main body 17 is recorded in this ROM. Each part of the winding unit main body 17 and the machine base control device 90 are connected to the I / O port and the communication port, and can communicate control information and the like. As a result, the unit control unit 51 can control the operation of each unit included in the winding unit main body 17.
[0037]
　In the winding unit main body 17, in the thread traveling path between the thread feeding bobbin 21 and the contact roller 29, the thread unwinding assisting device 12, the tension applying device 13, and the thread splicing are sequentially provided from the thread feeding bobbin 21 side. A device 14, a thread length detection sensor (detection unit) 15, a clearer 16, and a take-up unit 18 are arranged.
[0038]
　The thread unwinding assisting device 12 lowers the regulating member 40 that covers the core tube of the thread feeding bobbin 21 in conjunction with the unwinding of the thread 20 from the thread feeding bobbin 21 so that the thread 20 from the thread feeding bobbin 21 is lowered. Assist in unraveling. The regulating member 40 comes into contact with a balloon formed on the upper part of the thread feeding bobbin 21 by the rotation and centrifugal force of the thread 20 unwound from the thread feeding bobbin 21, and the thread 20 is controlled to an appropriate size. Assists in unraveling. In the vicinity of the regulating member 40, a sensor (not shown) for detecting the upper part of the yarn layer of the yarn feeding bobbin 21 is provided. When this sensor detects the lowering of the upper part of the yarn layer, the regulating member 40 is configured to lower accordingly.
[0039]
　The tension applying device 13 applies a predetermined tension to the traveling thread 20. As the tension applying device 13, for example, a gate type in which movable comb teeth are arranged with respect to fixed comb teeth can be used. The comb teeth on the movable side can be rotated by a rotary solenoid so that the comb teeth are in a meshed state or an released state. In addition to the gate type, for example, a disc type can be adopted for the tension applying device 13.
[0040]
　The thread splicing device 14 uses the bobbin thread on the thread feeding bobbin 21 side and the bobbin thread on the package 30 side when the clearer 16 detects a thread defect and cuts the thread, or when the thread breaks during unwinding from the thread feeding bobbin 21. The upper thread and the thread are spliced ​​together. As the thread joining device 14, a mechanical type or a configuration using a fluid such as compressed air can be adopted.
[0041]
　The yarn length detection sensor 15 detects the yarn length of the yarn 20 wound around the package 30 in a non-contact manner. The thread length detection sensor 15 detects the amount of fluff of the thread 20, calculates the amount of movement of the thread 20, and detects the thread length. Specifically, the thread length detection sensor 15 includes a plurality of optical fluff detection units including a light receiving element and a light source along the thread traveling direction. The yarn length detection sensor 15 detects the traveling length of the yarn 20 based on changes in output signals of a plurality of fluff detecting units located at different positions in the yarn traveling direction.
[0042]
　The unit control unit 51 can obtain the package diameter by using the running length of the yarn 20 detected by the yarn length detection sensor 15. Specifically, the unit control unit 51 can calculate the twill angle from the yarn running speed calculated based on the yarn running length detected by the yarn length detection sensor 15 and the twill swing speed. The twill swing speed can be acquired based on the control performed by the unit control unit 51. Then, the unit control unit 51 calculates the package diameter based on the twill angle, the peripheral speed of the package 30, and the rotation speed of the package 30.
[0043]
　The clearer 16 includes a clearer head 49 in which a sensor (not shown) for detecting the thickness of the thread 20 is arranged, and an analyzer 55 that processes a thread thickness signal from the sensor. The clearer 16 detects a thread defect such as a slab by monitoring the thread thickness signal from the sensor. In the vicinity of the clearer head 49, a cutter (not shown) that cuts the thread 20 immediately when the clearer 16 detects a thread defect is provided.
[0044]
　On the lower and upper sides of the thread splicing device 14, a bobbin thread catching member 25 that captures the thread end of the bobbin thread on the thread feeding bobbin 21 side and guides the thread end to the thread splicing device 14, and the thread end of the upper thread on the package 30 side. A needle thread catching member (guide member) 26 for catching and guiding the thread to the thread joining device 14 is provided. The bobbin thread catching member 25 includes a bobbin thread pipe arm 33 and a bobbin thread suction port 32 formed at the tip of the bobbin thread pipe arm 33. The needle thread catching member 26 includes a needle thread pipe arm 36 and a needle thread suction port 35 formed at the tip of the needle thread pipe arm 36.
[0045]
　The bobbin thread pipe arm 33 and the needle thread pipe arm 36 are rotatable about the shaft 34 and the shaft 37, respectively. An appropriate negative pressure source (not shown) is connected to the bobbin thread pipe arm 33 and the needle thread pipe arm 36, respectively. As a result, a suction flow is generated in the bobbin thread suction port 32 and the needle thread suction port 35, and the thread ends of the needle thread and the bobbin thread can be sucked and captured by the bobbin thread pipe arm 33 and the needle thread pipe arm 36, respectively.
[0046]
　The take-up portion 18 includes a cradle 23 that detachably supports the take-up pipe 22, a contact roller 29 that can rotate in contact with the outer peripheral surface of the take-up pipe 22 or the outer peripheral surface of the package 30, and a twill swing arm (twill). A vibration unit) 71 and a twill vibration drive motor 72 are provided.
[0047]
　The cradle 23 can rotate about the rotation shaft 48. As the yarn layer increases as the yarn 20 is wound around the take-up pipe 22, the cradle 23 rotates accordingly. This makes it possible to eliminate the influence of the shape change due to the increase in the thread layer.
[0048]
　A package drive motor 41 is attached to the cradle 23. The take-up pipe 22 is rotationally driven by the package drive motor 41 to wind the yarn 20 around the take-up pipe 22. When the take-up pipe 22 is supported by the cradle 23, the motor shaft of the package drive motor 41 is connected to the take-up pipe 22 so as not to rotate relative to each other (so-called direct drive method). The operation of the package drive motor 41 is controlled by the package drive control unit 42. The package drive control unit 42 adjusts the rotation speed (or its acceleration) of the package drive motor 41 in response to an instruction from the unit control unit 51.
[0049]
　A package rotation sensor (detection unit) 47 is attached to the tip of the cradle 23 on the opposite side. The package rotation sensor 47 detects the amount of rotation of the take-up pipe 22 (package 30) attached to the cradle 23. The package rotation sensor 47 outputs a pulse signal to the unit control unit 51 each time the package 30 rotates by a predetermined angle. The unit control unit 51 can calculate the rotation speed of the package 30 by measuring the number of pulses per hour.
[0050]
　The twill swing arm 71 engages with the thread 20 to twill the thread 20. The twill swing arm 71 is driven by the twill swing drive motor 72. Specifically, the twill swing arm 71 reciprocates continuously in the package width direction (axial direction of the take-up pipe 22 and the package 30) in conjunction with the forward and reverse rotation of the rotor of the twill swing drive motor 72. It is provided in. The operation of the twill drive motor 72 is controlled by the unit control unit 51 via the twill drive control unit 73. For example, a hook-shaped thread guide portion is formed at the tip of the twill swing arm 71. The thread 20 can be twilled by the twill swing arm 71 performing a reciprocating swivel motion while the thread 20 is held by the thread guide portion. A guide plate 28 is provided slightly upstream of the twill swing portion. The guide plate 28 guides the thread 20 on the upstream side to the twill swing portion. With the above configuration, the unwound yarn 20 from the yarn feeding bobbin 21 can be wound to form the package 30.
[0051]
　Next, controlling the winding of the yarn 20 by using the package diameter will be described with reference to FIG. FIG. 3 is a graph illustrating a process of controlling the twill swing width based on the control package diameter.
[0052]
　As described above, the unit control unit 51 can calculate the package diameter by performing calculations based on the detected values ​​of various sensors. Further, in the automatic winder 1, various control values ​​are calculated based on the package diameter. Hereinafter, the package diameter for performing such control is referred to as a “control package diameter”. On the other hand, the package diameter calculated from the detected values ​​of various sensors is referred to as "calculated package diameter". The value obtained by removing noise or performing statistical processing (for example, moving average) on the calculated package diameter is also referred to as the calculated package diameter.
[0053]
　In addition, the calculation package diameter may be an inappropriate value due to noise or the like. Therefore, in the present embodiment, the control value is not calculated by directly using the calculation package diameter, but the control package diameter is calculated based on the calculation package diameter, and the control value is calculated based on the control package diameter. ing. Further, the control package diameter is updated at any time based on the calculation package diameter.
[0054]
　In the present embodiment, control is performed to change the twill swing width based on the control package diameter. Specifically, as shown in FIG. 3, as the diameter of the control package increases, the twill swing width is reduced to control the creation of the package 30 having a tapered end face. For example, when the arithmetic package diameter is used in this control, it is conceivable that the arithmetic package diameter decreases due to the influence of noise and the like, and then increases again. In this case, since the twill swing width temporarily increases and decreases again, the thread 20 may be guided to a portion where the thread layer does not exist, so that twill drop may occur.
[0055]
　Therefore, in the present embodiment, the unit control unit 51 updates the control package diameter based on the calculation package diameter, and does not reduce the control package diameter. That is, when the calculation package diameter is smaller than the control package diameter, the unit control unit 51 does not change the control package diameter. Further, in order to prevent a sudden increase in the control package diameter, an upper limit (hereinafter, an increase threshold value) is set for the amount of increase in the control package diameter at the time of renewal. When the diameter of the control package suddenly increases, the diameter of the control package does not change for a while after that, so that the end face of the package 30 is distorted. Further, since the influence of the increase in the control package diameter differs depending on the thread thickness or the control package diameter, the increase threshold value is not a constant value but a variable value. Specifically, as the thread thickness becomes thinner, the rate of increase in the control package diameter decreases, so that the effect of the increase in the control package diameter becomes relatively large. Similarly, as the control package diameter increases, the rate of increase in the control package diameter decreases (because the rate of increase in the control package diameter also decreases), so the effect of the increase in the control package diameter becomes relatively large. .. Therefore, in the present embodiment, the increase threshold value becomes smaller as the thread thickness becomes thinner or the control package diameter becomes larger.
[0056]
　Hereinafter, the calculation of the increase threshold value and the process of updating the control package diameter using the increase threshold value will be described with reference to FIGS. 4 and 5. FIG. 4 is a flowchart showing a process of updating the control package diameter based on the increase threshold value. FIG. 5 is a graph showing the correspondence between the thread thickness and the control package diameter and the increase threshold value.
[0057]
　First, the unit control unit 51 calculates the thread thickness based on the set thread count (S101). At the time of winding the yarn 20, it is common that the machine base control device 90 stores the yarn count by, for example, an operator operating the machine base input unit 91 or the like. The unit control unit 51 calculates the thread thickness based on the thread count. As a method of calculating the thread thickness from the thread count, for example, a function or the like may be used, or a table in which the relationship between a typical thread count and the thread thickness is registered in advance may be used. Further, instead of the configuration in which the unit control unit 51 calculates the thread thickness based on the set thread count, the machine stand control device 90 calculates and calculates the thread thickness based on the set thread count. It is also possible to configure the machine stand control device 90 to collectively transmit the values ​​to the unit control unit 51.
[0058]
　Next, the unit control unit 51 calculates an initial increase threshold value, which is an increase threshold value at the time of the minimum package diameter, based on the thread thickness calculated in step S101 (S102). The minimum package diameter is the smallest control package diameter in the process of changing the increase threshold value based on the control package diameter. For example, the minimum package diameter is the control package diameter (that is, the diameter of the take-up pipe 22) at the start of winding the yarn 20. The minimum package diameter is a preset fixed value, and the same value is used even if the thread count is different. The minimum package diameter can be changed according to the change in winding conditions. The initial increase threshold is calculated by a function or table with the thread thickness as a variable. As shown in FIG. 4, as the tendency of the initial increase threshold value, a larger value is calculated as the thread thickness becomes thicker.
[0059]
　Next, the unit control unit 51 calculates the maximum package diameter, which is the control package diameter when the increase threshold value becomes the minimum increase threshold value, based on the thread thickness (S103). In the present embodiment, as shown in FIG. 5, a minimum increase threshold value and a maximum increase threshold value are set in advance. In this embodiment, the minimum increase threshold and the maximum increase threshold are applied regardless of the thread thickness or the control package diameter. Therefore, the unit control unit 51 calculates an increase threshold that is equal to or greater than the minimum increase threshold and is less than or equal to the maximum increase threshold. The increase threshold decreases as the control package diameter increases, and coincides with the minimum increase threshold after a certain control package diameter. The control package diameter at the time of this matching is the maximum package diameter. The maximum package diameter is calculated by a function or table with the thread thickness as a variable. As shown in FIG. 5, as the tendency of the maximum package diameter, a larger value is calculated as the thread thickness becomes thicker.
[0060]
　Next, the unit control unit 51 determines whether or not the maximum package diameter calculated in step S103 is larger than the above-mentioned minimum package diameter (S104). When the maximum package diameter is equal to or less than the minimum package diameter, the unit control unit 51 sets the increase threshold value to be the maximum increase threshold value (S105). The processing of steps S101 to S103 is calculated based on a value that does not depend on the current control package diameter. Therefore, as long as winding is continued under the same conditions, the increase threshold is always set to be the maximum increase threshold regardless of the current control package diameter.
[0061]
　When the maximum package diameter is larger than the minimum package diameter, the unit control unit 51 calculates an increase threshold value at the current control package diameter based on a straight line passing through the above two points (S106). The above two points are a point calculated in step S102 (minimum package diameter, initial increase threshold value) and a point calculated in step S103 (maximum package diameter, minimum increase threshold value). As a result, as shown in FIG. 5 (particularly the portion between the minimum package diameter and the maximum package diameter), the correspondence between the control package diameter and the increase threshold value (linear equation, linear equation) is calculated. Therefore, the unit control unit 51 calculates the increase threshold value by inputting the current control package diameter into the equation of this straight line. The slope of this straight line may be different or the same depending on the thread thickness.
[0062]
　Next, the unit control unit 51 determines whether or not the increase threshold value calculated in step S106 is smaller than the minimum increase threshold value (S107). When this increase threshold value is smaller than the minimum increase threshold value, the unit control unit 51 sets the minimum increase threshold value as the increase threshold value currently used (S108). This appears in FIG. 5 where the increase threshold is always the minimum increase threshold in the portion larger than the maximum package diameter. When the increase threshold value calculated in step S106 is larger than the minimum increase threshold value, the calculated increase threshold value is set as the increase threshold value currently used.
[0063]
　Next, the unit control unit 51 subtracts the control package diameter from the calculation package diameter to calculate the increased diameter (S109). The increased diameter is the package diameter increased by winding the yarn 20, and is preferably added to the control package diameter, but it is preferable to prevent a sudden increase as described above. Further, when the control package diameter is larger than the calculation package diameter due to noise or the like, the calculation result becomes negative and the increased diameter cannot be calculated. In this case, the update of the control package diameter at the present time is stopped.
[0064]
　Next, the unit control unit 51 determines whether or not the increase diameter calculated in step S109 is larger than the increase threshold set to be used at the present time (S110). If the increase diameter is equal to or less than the increase threshold value, it does not correspond to a rapid increase. Therefore, the unit control unit 51 updates the control package diameter by matching the control package diameter with the calculation package diameter (S111). When the increase diameter is larger than the increase threshold value, the unit control unit 51 updates the control package diameter by adding the increase threshold value to the current control package diameter (S112).
[0065]
　Further, the unit control unit 51 performs the processing of step S104 and subsequent steps again after a predetermined time after updating the control package diameter. As a result, the control package diameter is updated so as to substantially follow the calculation package diameter. Further, based on the updated control package diameter, control regarding winding of the yarn 20 is performed. As described above, it is possible to update the control package diameter so that it becomes larger while preventing a sudden increase in the control package diameter.
[0066]
　As described above, the automatic winder 1 of the above embodiment includes a winding unit 18, a detection unit (thread length detection sensor 15 and a package rotation sensor 47), and a unit control unit 51, and includes the following spools. Take the method. The winding unit 18 winds the thread 20 to form the package 30. The detection unit detects a value (thread running speed, rotation speed of the package 30) used for calculating the package diameter. The unit control unit 51 calculates the calculation package diameter, which is the package diameter based on the value detected by the detection unit (calculation step). The unit control unit 51 updates the control package diameter, which is the package diameter used for controlling the winding of the yarn 20, based on the increase in the calculation package diameter (update step). The unit control unit 51 calculates an increase threshold value in which the value changes based on at least one of the thread thickness and the control package diameter (calculation step). When the value obtained by subtracting the control package diameter from the calculation package diameter exceeds the increase threshold value, the unit control unit 51 increases the control package diameter by the amount corresponding to the increase threshold value.
[0067]
　As a result, by setting an increase threshold value for updating the control package diameter, it is possible to prevent the control content of the winding of the yarn 20 from suddenly changing. In particular, the effect of updating the control package diameter differs depending on the thread thickness or the control package diameter. Therefore, the control package diameter can be appropriately updated by setting the increase threshold value based on these.
[0068]
　Further, in the automatic winder 1 of the above embodiment, the minimum increase threshold value and the maximum increase threshold value are defined as the increase threshold value calculated by the unit control unit 51. The unit control unit 51 calculates the increase threshold value so as to be equal to or more than the minimum increase threshold value and not more than or equal to the maximum increase threshold value.
[0069]
　As a result, it is possible to prevent the under- or excessive increase threshold value from being calculated and applied, so that the control package diameter can be updated more appropriately.
[0070]
　Further, in the automatic winder 1 of the above embodiment, the unit control unit 51 calculates an increase threshold value in which the value changes based on both the thread thickness and the control package diameter.
[0071]
　As a result, the threshold value changes based on both of the two values ​​related to the magnitude of the influence of the update of the control package diameter, so that the control package diameter can be updated more appropriately.
[0072]
　Further, in the automatic winder 1 of the above embodiment, the unit control unit 51 calculates an initial increase threshold value, which is an increase threshold value applied when the control package diameter is the minimum, based on the thread thickness.
[0073]
　As a result, the initial increase threshold can be calculated by a simple process.
[0074]
　Further, in the automatic winder 1 of the above embodiment, the unit control unit 51 calculates the control package diameter (maximum package diameter) when the increase threshold value matches the minimum increase threshold value based on the thread thickness.
[0075]
　Thereby, the control package diameter when the increase threshold value matches the minimum increase threshold value can be calculated by a simple process.
[0076]
　Further, in the automatic winder 1 of the above embodiment, when the unit control unit 51 has an initial increase threshold value, a control package diameter (minimum package diameter) at the initial increase threshold value, a minimum increase threshold value, and a minimum increase threshold value. The correspondence between the increase threshold value and the control package diameter is calculated based on the control package diameter (maximum package diameter) of. The correspondence includes a portion where the increase threshold changes linearly as the control package diameter increases.
[0077]
　As a result, the correspondence between the increase threshold value and the control package diameter can be calculated by a simple process of finding two points on the coordinate axes and finding a straight line passing through them.
[0078]
　Further, in the automatic winder 1 of the above embodiment, the unit control unit 51 calculates the increase threshold value at least based on the thread thickness. The minimum increase threshold is constant regardless of the thread thickness.
[0079]
　This makes it unnecessary to calculate the minimum increase threshold value according to the thread thickness, which simplifies the process.
[0080]
　Further, in the automatic winder 1 of the above embodiment, the unit control unit 51 calculates the thread thickness based on the input thread count, and calculates the increase threshold value based on the calculated thread thickness. As another embodiment, the machine base control device 90 may calculate the thread thickness based on the set thread count, and transmit the calculated value to the unit control unit 51.
[0081]
　As a result, the operator does not have to directly input the thread thickness, so that the operator's labor can be reduced. Further, when the machine base control device 90 transmits the thread thickness to the unit control unit 51, it is possible to reduce the labor of the operator's work.
[0082]
　Further, in the automatic winder 1 of the above embodiment, the unit control unit 51 does not perform the process of reducing the control package diameter even when the calculation package diameter is smaller than the control package diameter, and the control is performed. Does not change the package diameter.
[0083]
　As a result, it is possible to prevent the winding control from becoming inappropriate as the diameter of the control package decreases.
[0084]
　Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.
[0085]
　In the above embodiment, the relationship between the control package diameter and the increase threshold value is linear. Instead, as shown in FIG. 6, the relationship between the control package diameter and the increase threshold value may be non-linear (so that it becomes a curve when drawn on a graph). Specifically, this curve is preferably convex in the downward direction (the side where the increase threshold is small), and more specifically, it is more preferably an inversely proportional curve.
[0086]
　In the above embodiment, the unit control unit 51 performs a process of updating the control package diameter. Instead of this, the above-mentioned processing may be performed by the machine base control device 90 or another control device.
[0087]
　As a configuration for determining the calculation package diameter, an angle sensor for detecting the angle of the cradle 23 (rotation angle around the rotation shaft 48) may be used. This angle sensor is composed of, for example, a rotary encoder, and transmits an angle signal corresponding to the angle of the cradle 23 to the unit control unit 51. Since the angle of the cradle 23 changes as the package 30 rolls up, the calculated package diameter can be obtained by detecting the angle with the angle sensor and performing a calculation. A sensor that detects the rotational speed of the contact roller 29 can also be used as the detection unit for determining the calculation package diameter. In particular, in a cheese package having the same diameter in the winding axis direction, the rotation speed of the contact roller 29 is close to the peripheral speed of the package, so that the calculated package diameter can be obtained by performing the same processing as in the above embodiment.
[0088]
　As a detection unit for obtaining the calculation package diameter, a timer capable of measuring the elapsed time can be used. In this case, the time change of the thickness of the yarn layer is determined in advance by calculation or empirical value based on the winding conditions. Then, the thickness of the yarn layer is obtained based on the determined value and the measured elapsed time. Then, the calculation package diameter is calculated by adding the diameter of the take-up pipe 22 to the thickness of the yarn layer. It should be noted that this timer can measure the elapsed time in consideration of the time during which winding is interrupted due to thread cutting and thread breakage.
[0089]
　In the above embodiment, the thread thickness is calculated based on the set thread count, but the unit control unit 51 can also recognize the thread thickness by inputting the thread thickness by the operator.
[0090]
　In the above embodiment, both the increase threshold value based on the thread thickness and the increase threshold value based on the control package diameter are changed, but either one may be omitted.
[0091]
　Instead of directly rotating and driving the package 30 with the package drive motor 41, the package 30 may be driven to rotate by the rotation of the contact roller 29.
[0092]
　Further, the present invention is not limited to automatic winders, but can be applied to other yarn winders such as rewinders and spinning machines (for example, air spinning machines and open-end spinning machines).
Code description
[0093]
　1 Automatic winder
　15 Thread length detection sensor (detection unit)
　18 Winding unit
　30 Package
　47 Package rotation sensor (detection unit)
　51 Unit control unit (control unit)
　90 Machine stand control device (control device)
The scope of the claims
[Claim 1]
　A winding unit that winds a thread to form a package,
　a detection unit that detects a value used for calculating the package diameter, and a
　control unit
are provided, and the
　control unit is
　based on a value detected by the detection unit. The calculated package diameter, which is the package diameter, is calculated
　, and the control package diameter, which is the package diameter used for controlling the winding of the thread, is updated based on the increase in the calculated package diameter, and the
　thread thickness and the control package diameter are updated. An increase threshold in which the value changes is calculated based on at least one of the
　above, and when the value obtained by subtracting the control package diameter from the calculation package diameter exceeds the increase threshold, the amount corresponding to the increase threshold is described. A thread winder characterized by increasing the diameter of the control package.
[Claim 2]
　The thread winder according to claim 1,
　wherein the increase threshold value calculated by the control unit is defined as a minimum increase threshold value and a maximum increase threshold value, and the
　control unit is equal to or more than the minimum increase threshold value. A thread winder, characterized in that the increase threshold value is calculated so as to be equal to or less than the maximum increase threshold value.
[Claim 3]
　The thread
　winder according to claim 2, wherein the control unit calculates the increase threshold value whose value changes based on both the thread thickness and the control package diameter. ..
[Claim 4]
　The thread
　winder according to claim 3, wherein the control unit calculates an initial increase threshold value, which is the increase threshold value applied when the control package diameter is the minimum, based on the thread thickness. A featured thread winder.
[Claim 5]
　The thread
　winder according to claim 4, wherein the control unit calculates the control package diameter when the increase threshold value matches the minimum increase threshold value based on the thread thickness. Thread winder.
[Claim 6]
　The thread winder according to claim 5,
　wherein the control unit has the initial increase threshold value, the control package diameter at the initial increase threshold value, the minimum increase threshold value, and the minimum increase threshold value. The correspondence relationship between the increase threshold value and the control package diameter is calculated based on the control package diameter, and the increase threshold value linearly changes according to the increase in the control package diameter. A thread winder characterized by including a part to be used.
[Claim 7]
　The thread
　winder according to any one of claims 2 to 6, wherein the control unit calculates the increase threshold value based on at least the thread thickness, and the minimum increase threshold value is the thread thickness. A bobbin winder characterized by being constant regardless.
[Claim 8]
　The
　thread winder according to any one of claims 1 to 7, wherein the control unit calculates a thread thickness based on an input thread count, and based on the calculated thread thickness. A thread winder, characterized in that the increase threshold value is calculated.
[Claim 9]
　The yarn winding machine according to any one of claims 1 to 7,
　a plurality of winding units,
　and a control unit that performs to set collectively to the plurality of winding units,
provided with,
　the control The apparatus is a thread winder, which calculates a thread thickness based on an input thread count and transmits the calculated thread thickness to each of the control units included in the plurality of winding units. ..
[Claim 10]
　The
　control package diameter of the bobbin winder according to any one of claims 1 to 9, even when the calculation package diameter is smaller than the control package diameter of the control unit. A bobbin winder characterized in that the diameter of the control package is not changed without performing a process of reducing the amount of water.
[Claim 11]
　In the thread winding method of winding a thread to form a package,
　an calculation process for calculating a package diameter based on a detected value and
　a control package diameter which is a package diameter used for controlling thread winding are used. the updating step of updating based on the increase of the operational package diameter,
　a calculation step of calculating an increase threshold value is changed based on at least one of yarn thickness and the package diameter for said control,
wherein the
　said updating In the step, when the value obtained by subtracting the control package diameter from the calculation package diameter exceeds the increase threshold, the thread winding is characterized in that the control package diameter is increased by the amount corresponding to the increase threshold. Method.