WO2019155807A1

WO2019155807A1 - Yarn winding machine and yarn winding method

Info

Publication number: WO2019155807A1
Application number: PCT/JP2019/000273
Authority: WO
Inventors: 勝文牟田; 朋之一階
Original assignee: 村田機械株式会社
Priority date: 2018-02-07
Filing date: 2019-01-09
Publication date: 2019-08-15
Also published as: JP2019137480A; CN111683888B; CN111683888A

Abstract

An automatic winder (yarn winding machine) according to the present invention is provided with a winder unit, a detection unit, and a control unit. The winder unit winds yarn to form a package. The detection unit detects a value to be used for calculation of a package diameter. The control unit calculates an arithmetic package diameter which is a package diameter based on the value detected by the detection unit. The control unit updates, on the basis of an increase in the arithmetic package diameter, a control package diameter which is a package diameter for use in controlling the winding of yarn. The control unit calculates an increment threshold, the value of which changes on the basis of the thickness of the yarn and/or the control package diameter. In the case when a value obtained by subtracting the control package diameter from the arithmetic package diameter exceeds the increment threshold, the control unit increases the control package diameter by an amount corresponding to said increment threshold.

Description

Yarn winding machine and yarn winding method

The present invention mainly relates to a yarn winding machine that controls the winding of the yarn according to the control package diameter.

2. Description of the Related Art Conventionally, a yarn winding machine that obtains a package diameter by calculation and uses the package diameter obtained by this calculation to control winding of the yarn is known. The yarn winding machine disclosed in Patent Document 1 detects a package peripheral speed and a package rotation speed with a sensor, and calculates an average outer shape of the package based on these. Japanese Patent Application Laid-Open No. 2004-228561 describes that a package drive point is calculated using a package reference value that is an average external shape of a package calculated in this way.

JP 2014-40325 A

However, Patent Document 1 does not describe how to update the package reference value. For example, when the package diameter obtained by calculation is directly updated as the package reference value, if the average outer shape of the package changes significantly due to the detection error of the sensor and the noise, the drive point of the package is calculated accordingly. For this reason, the control content may become inappropriate. Similar problems exist not only in the calculation of the drive points of the package but also in other controls relating to winding of the yarn.

The present invention has been made in view of the above circumstances, and its main purpose is to suppress a sudden change in the control content in a yarn winding machine that performs control related to winding of a yarn according to the package diameter. It is to provide a possible configuration.

Means and effects for solving the problems

The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

According to a first aspect of the present invention, a yarn winding machine having the following configuration is provided. That is, the yarn winding machine includes a winding unit, a detection unit, and a control unit. The winding unit winds a yarn to form a package. The detection unit detects a value used for calculating the package diameter. The said control part calculates the calculation package diameter which is a package diameter based on the value which the said detection part detected. The control unit updates a control package diameter, which is a package diameter used for controlling the winding of the yarn, based on an increase in the calculation package diameter. The control unit calculates an increase threshold value that changes based on at least one of the yarn 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 an amount corresponding to the increase threshold value.

Thus, by providing an increase threshold value for updating the control package diameter, it is possible to prevent a sudden change in the control content of the yarn winding. In particular, the effect of updating the control package diameter varies depending on the thread thickness or the control package diameter. Therefore, the control package diameter can be appropriately updated by setting an increase threshold based on these.

The above-described yarn winding machine preferably has the following configuration. That is, a minimum increase threshold value and a maximum increase threshold value are determined as the increase threshold value calculated by the control unit. The control unit calculates the increase threshold so as to be equal to or greater than the minimum increase threshold and equal to or less than the maximum increase threshold.

This makes it possible to prevent an excessive or excessive increase threshold value from being calculated and applied, so that the control package diameter can be updated more appropriately.

In the yarn winding machine, it is preferable that the control unit calculates the increase threshold value that changes based on both the yarn thickness and the control package diameter.

This makes it possible to update the control package diameter more appropriately because 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.

In the yarn winding machine, it is preferable that the control unit calculates an initial increase threshold value that is the increase threshold value to be applied when the control package diameter is minimum based on the yarn thickness.

This makes it possible to calculate the initial increase threshold value with a simple process.

In the yarn winding machine, the control unit preferably calculates the control package diameter when the increase threshold matches the minimum increase threshold based on the yarn thickness.

This makes it possible to calculate the control package diameter when the increase threshold matches the minimum increase threshold with a simple process.

In the yarn winding machine, the control unit includes the initial increase threshold, the control package diameter at the initial increase threshold, the minimum increase threshold, and the control package at the minimum increase threshold. The correspondence relationship between the increase threshold value and the control package diameter is calculated based on the diameter, and the correspondence relationship includes a portion in which the increase threshold value changes linearly as the control package diameter increases. Is preferred.

This makes it possible to calculate the correspondence between the increase threshold and the control package diameter with a simple process of obtaining two points on the coordinate axes and obtaining a straight line passing through them.

In the yarn winding machine, the control unit calculates the increase threshold based on at least the yarn thickness. The minimum increase threshold is preferably constant regardless of the thread thickness.

This eliminates the need to calculate the minimum increase threshold according to the thread thickness and simplifies the process.

In the yarn winding machine, it is preferable that the control unit calculates a yarn thickness based on the input yarn count, and calculates the increase threshold based on the calculated yarn thickness.

This eliminates the need for the operator to input the thread thickness directly, thereby reducing operator trouble.

The above-described yarn winding machine preferably has the following configuration. That is, the yarn winding machine includes a plurality of winding units and a control device. The control device collectively sets the plurality of winding units. The control device calculates a yarn thickness based on the input yarn count, and transmits the calculated yarn thickness to each control unit of the plurality of winding units.

Thus, the thread thickness can be set for a plurality of winding units only by inputting the yarn count on the control device side, so that the labor of the operator can be reduced.

In the yarn winding machine, the control unit 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 package diameter Is preferably not changed.

This can prevent the winding control from becoming inappropriate as the control package diameter decreases.

According to the second aspect of the present invention, the following yarn winding method is provided. That is, this yarn winding method includes a calculation process, an update process, and a calculation process. In the calculation step, a calculation package diameter that is a package diameter based on the detected value is calculated. In the updating step, the control package diameter, which is a package diameter used for controlling the winding of the yarn, is updated based on the increase in the arithmetic package diameter. In the calculation step, an increase threshold value that changes based on at least one of the yarn thickness and the control package diameter is calculated. In the updating step, when the value obtained by subtracting the control package diameter from the calculation package diameter exceeds the increase threshold, the control package diameter is increased by an amount corresponding to the increase threshold.

This makes it possible to prevent the yarn winding control from changing abruptly by providing an increase threshold for updating the control package diameter. In particular, the magnitude of the effect of updating the control package diameter varies depending on the thread thickness or the control package diameter. Therefore, the control package diameter can be appropriately updated by setting an increase threshold based on these.

The front view of the automatic winder which concerns on one Embodiment of this invention. The front view and block diagram of a yarn winding unit. The graph explaining the process which controls a traverse width based on the package diameter for control. The flowchart which shows the process which updates the package diameter for control based on an increase threshold value. The graph which shows the correspondence of thread | yarn thickness, the package diameter for control, and an increase threshold value. The graph which shows another example of the correspondence of thread | yarn thickness, the package diameter for control, and an increase threshold value.

Next, an embodiment of the present invention will be described with reference to the drawings. In the present specification, “upstream” and “downstream” mean upstream and downstream in the traveling direction of the yarn when winding the yarn.

As shown in FIG. 1, the automatic winder (yarn winding machine) 1 includes a plurality of yarn winding units 10 arranged side by side, a doffing device 60, and a machine base control device (control device) 90. .

Each yarn winding unit 10 winds the yarn 20 unwound from the yarn supplying bobbin 21 while winding it around a cone-shaped winding tube 22 supported by a cradle (winding tube support portion) 23. A 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 winding tube 22, a large-diameter side support portion that rotatably supports the large-diameter side end portion of the winding tube 22, have. The yarn winding unit 10 may be configured to wind the yarn 20 around a cylindrical winding tube 22 to form a cheese-shaped package 30.

The doffing device 60 travels to the position of the yarn winding unit 10 when the package 30 becomes full in each yarn winding unit 10. In the yarn winding unit 10, the doffing device 60 removes the full package 30 from the cradle 23 and supplies the winding tube 22 around which the yarn 20 is not wound.

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 the respective yarn winding units 10 when an operator inputs a predetermined set value or selects an appropriate control method. The machine base display unit 92 can display a setting value input screen, the winding state of the yarn 20 of each yarn winding unit 10, the content of the trouble that has occurred, and the like.

Next, the configuration of the yarn winding unit 10 will be specifically described with reference to FIG. As shown in FIG. 2, each yarn winding unit 10 includes a winding unit main body 17 and a unit control unit (control unit) 51.

The unit controller 51 includes, for example, an arithmetic device such as a CPU, a RAM, a ROM, an I / O port, and a communication port. In this ROM, a program for controlling each part of the winding unit body 17 is recorded. The I / O port and the communication port are connected to each unit of the winding unit body 17 and the machine control device 90, and can communicate control information and the like. Thereby, the unit control part 51 can control operation | movement of each part with which the winding unit main body 17 is provided.

The winding unit body 17 includes a yarn unwinding assisting device 12, a tension applying device 13, a yarn splicing device in order from the yarn feeding bobbin 21 side in the yarn traveling path between the yarn feeding bobbin 21 and the contact roller 29. An apparatus 14, a yarn length detection sensor (detection unit) 15, a clearer 16, and a winding unit 18 are disposed.

The yarn unwinding assisting device 12 lowers the regulating member 40 covering the core pipe of the yarn supplying bobbin 21 in conjunction with the unwinding of the yarn 20 from the yarn supplying bobbin 21, so that the yarn 20 from the yarn supplying bobbin 21 is lowered. Assist with unraveling. The regulating member 40 comes into contact with the balloon formed on the upper portion of the yarn feeding bobbin 21 by the rotation and centrifugal force of the yarn 20 unwound from the yarn feeding bobbin 21, and the yarn 20 is controlled by controlling the balloon to an appropriate size. To help solve the problem. A sensor (not shown) for detecting the upper part of the yarn layer of the yarn feeding bobbin 21 is provided in the vicinity of the regulating member 40. When this sensor detects the lowering of the upper part of the yarn layer, the restricting member 40 is lowered accordingly.

The tension applying device 13 applies a predetermined tension to the traveling yarn 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 movable comb teeth can be rotated by a rotary solenoid so that the comb teeth are in a meshed state or a released state. In addition to the gate type, for example, a disk type can be adopted as the tension applying device 13.

The yarn joining device 14 includes a lower yarn on the yarn supplying bobbin 21 side and a package 30 side when the clearer 16 detects a yarn defect and performs yarn cutting or when yarn breakage occurs during unwinding from the yarn supplying bobbin 21. The upper thread is spliced. As the yarn joining device 14, a mechanical type or a configuration using a fluid such as compressed air can be employed.

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 yarn length detection sensor 15 detects the fluff amount of the yarn 20, calculates the movement amount of the yarn 20, and detects the yarn length. Specifically, the yarn length detection sensor 15 includes a plurality of optical fluff detection units including a light receiving element and a light source along the yarn traveling direction. The yarn length detection sensor 15 detects the running length of the yarn 20 based on changes in output signals of a plurality of fluff detection units located at different positions in the yarn running direction.

The unit controller 51 can obtain the package diameter using the traveling length of the yarn 20 detected by the yarn length detection sensor 15. Specifically, the unit controller 51 can calculate the traverse angle from the yarn travel speed calculated based on the yarn travel length detected by the yarn length detection sensor 15 and the traverse speed. The traverse speed can be acquired based on the control performed by the unit controller 51. Then, the unit controller 51 calculates the package diameter based on the twill angle, the peripheral speed of the package 30, and the rotational speed of the package 30.

The clearer 16 includes a clearer head 49 in which an unillustrated sensor for detecting the thickness of the yarn 20 is disposed, and an analyzer 55 that processes a yarn thickness signal from the sensor. The clearer 16 detects a yarn defect such as a slab by monitoring a yarn thickness signal from the sensor. In the vicinity of the clearer head 49, a cutter (not shown) that cuts the yarn 20 immediately when the clearer 16 detects a yarn defect is provided.

On the lower side and the upper side of the yarn joining device 14, a lower yarn catching member 25 that catches the yarn end of the lower yarn on the yarn feeding bobbin 21 side and guides it to the yarn joining device 14, and a yarn end of the upper yarn on the package 30 side. An upper thread catching member (guide member) 26 for catching and guiding the thread to the yarn joining device 14 is provided. The lower thread catching member 25 includes a lower thread pipe arm 33 and a lower thread suction port 32 formed at the tip of the lower thread pipe arm 33. The upper thread catching member 26 includes an upper thread pipe arm 36 and an upper thread suction port 35 formed at the tip of the upper thread pipe arm 36.

The lower thread pipe arm 33 and the upper thread pipe arm 36 are rotatable about a shaft 34 and a shaft 37, respectively. Appropriate negative pressure sources (not shown) are connected to the lower thread pipe arm 33 and the upper thread pipe arm 36, respectively. Thus, a suction flow is generated at the lower thread suction port 32 and the upper thread suction port 35, and the lower thread pipe arm 33 and the upper thread pipe arm 36 can suck and capture the thread ends of the upper thread and the lower thread, respectively.

The winding unit 18 includes a cradle 23 that detachably supports the winding tube 22, a contact roller 29 that can rotate in contact with the outer peripheral surface of the winding tube 22 or the outer peripheral surface of the package 30, and a traverse arm (a traverse arm). And a traverse drive motor 72.

The cradle 23 can be rotated around a rotation shaft 48. As the yarn layer increases along with the winding of the yarn 20 around the winding tube 22, the cradle 23 rotates accordingly. Thereby, the influence of the shape change accompanying the increase in the yarn layer can be eliminated.

A package drive motor 41 is attached to the cradle 23. The winding tube 22 is rotationally driven by the package drive motor 41 to wind the yarn 20 around the winding tube 22. When the winding tube 22 is supported by the cradle 23, the motor shaft of the package drive motor 41 is connected to the winding tube 22 so as not to be relatively rotatable (so-called direct drive system). 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 rotational speed (or acceleration thereof) of the package drive motor 41 in response to an instruction from the unit control unit 51.

Also, 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 winding tube 22 (package 30) attached to the cradle 23. The package rotation sensor 47 outputs a pulse signal to the unit controller 51 every time the package 30 rotates by a predetermined angle. The unit controller 51 can calculate the rotational speed of the package 30 by measuring the number of pulses per time.

The traverse arm 71 engages with the yarn 20 and traverses the yarn 20. The traverse arm 71 is driven by a traverse drive motor 72. Specifically, the traverse arm 71 continuously reciprocates in the package width direction (the axial direction of the winding tube 22 and the package 30) in conjunction with the forward / reverse rotation of the rotor of the traverse drive motor 72. Is provided. The operation of the traverse drive motor 72 is controlled by the unit controller 51 via the traverse drive controller 73. For example, a hook-shaped thread guide portion is formed at the tip of the traverse arm 71. While the yarn 20 is held by the yarn guide portion, the traverse arm 71 performs a reciprocating swivel motion, whereby the yarn 20 can be traversed. A guide plate 28 is provided slightly upstream of the traverse position. The guide plate 28 guides the upstream yarn 20 to the traverse position. With the above configuration, the package 30 can be formed by winding the yarn 20 unwound from the yarn supplying bobbin 21.

Next, control of winding of the yarn 20 using the package diameter will be described with reference to FIG. FIG. 3 is a graph illustrating a process for controlling the traverse width based on the control package diameter.

As described above, the unit controller 51 can calculate the package diameter by performing calculations based on the detection values of various sensors. 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 “control package diameter”. On the other hand, the package diameter calculated from the detection values of various sensors is referred to as “calculated package diameter”. A value obtained by performing noise removal or statistical processing (for example, moving average) on the calculation package diameter is also referred to as a calculation package diameter.

Also, the computation package diameter may become an inappropriate value due to noise or the like. Therefore, in this embodiment, the control package diameter is not calculated 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. The control package diameter is updated as needed based on the calculation package diameter.

In this embodiment, control is performed to change the traverse width based on the control package diameter. Specifically, as shown in FIG. 3, as the control package diameter increases, the traversing width is reduced to control to create a package 30 having a tapered end surface. For example, in this control, when the computation package diameter is used, it is conceivable that the computation package diameter decreases due to the influence of noise or the like and then increases again. In this case, since the traversing width temporarily increases and then decreases again, traversing may occur when the yarn 20 is guided to a portion where the yarn layer does not exist.

Therefore, in this embodiment, the unit controller 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) is also provided for the amount of increase in the control package diameter at the time of update. When the control package diameter increases rapidly, the control package diameter does not change after that for a while, so that the end face of the package 30 is distorted. Further, since the influence of the increase in the control package diameter varies depending on the thread thickness or the control package diameter, the increase threshold value is not a constant value but a variation value. Specifically, as the yarn thickness becomes thinner, the increase rate of the control package diameter becomes smaller, so the influence of the increase in the control package diameter becomes relatively large. Similarly, as the control package diameter increases, the increase rate of the control package diameter decreases (because the rate of increase of the control package diameter also decreases), so the influence of the increase of the control package diameter becomes relatively large. . Therefore, in the present embodiment, the increase threshold value is decreased as the yarn thickness is reduced or the control package diameter is increased.

Hereinafter, with reference to FIG. 4 and FIG. 5, the calculation of the increase threshold value and the process of updating the control package diameter using the increase threshold value will be described. FIG. 4 is a flowchart showing a process of updating the control package diameter based on the increase threshold. FIG. 5 is a graph showing a correspondence relationship between the thread thickness, the control package diameter, and the increase threshold value.

First, the unit controller 51 calculates the yarn thickness based on the set yarn count (S101). When winding the yarn 20, it is common that the machine control device 90 stores the yarn count, for example, by an operator operating the machine input unit 91 or the like. The unit controller 51 calculates the yarn thickness based on the yarn count. As a method for calculating the yarn thickness from the yarn count, for example, a function or the like may be used, or a table in which a relationship between a representative yarn count and the yarn thickness is registered in advance may be used. Further, instead of the configuration in which the unit control unit 51 calculates the yarn thickness based on the set yarn count, the machine control device 90 calculates the yarn thickness based on the set yarn count, and calculates It is also possible to adopt a configuration in which the machine control device 90 transmits the values to the unit control unit 51 in a batch.

Next, the unit controller 51 calculates an initial increase threshold that is an increase threshold at the minimum package diameter based on the yarn thickness calculated in step S101 (S102). The minimum package diameter is the smallest control package diameter in the process of changing the increase threshold based on the control package diameter. For example, the minimum package diameter is the control package diameter at the start of winding of the yarn 20 (that is, the diameter of the winding tube 22). The minimum package diameter is a preset fixed value, and the same value is used even if the yarn count is different. Note that the minimum package diameter can be varied according to changes in the winding conditions. The initial increase threshold value is calculated by a function or a 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 yarn thickness becomes thicker.

Next, the unit controller 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 and a maximum increase threshold are set in advance. In the present embodiment, the minimum increase threshold and the maximum increase threshold are applied regardless of the thread thickness or the control package diameter. Accordingly, the unit controller 51 calculates an increase threshold that is greater than or equal to the minimum increase threshold and less than or equal to the maximum increase threshold. The increase threshold decreases as the control package diameter increases, and after a certain control package diameter, it coincides with the minimum increase threshold. The control package diameter at the time of coincidence 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 yarn thickness increases.

Next, the unit controller 51 determines whether or not the maximum package diameter calculated in step S103 is larger than the minimum package diameter (S104). When the maximum package diameter is equal to or smaller than the minimum package diameter, the unit controller 51 sets the increase threshold to be the maximum increase threshold (S105). Note that the processing in 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 the maximum increase threshold regardless of the current control package diameter.

When the maximum package diameter is larger than the minimum package diameter, the unit controller 51 calculates an increase threshold value for the current control package diameter based on the straight line passing through the two points (S106). The above two points are the points calculated in step S102 (minimum package diameter, initial increase threshold) and the points calculated in step S103 (maximum package diameter, minimum increase threshold). As a result, as shown in FIG. 5 (particularly, the portion between the minimum package diameter and the maximum package diameter), the correspondence relationship between the control package diameter and the increase threshold (linear equation, linear equation) is calculated. Accordingly, the unit control unit 51 calculates the increase threshold value by inputting the current control package diameter into this linear equation. In addition, the inclination of this straight line may differ according to thread thickness, and may be the same.

Next, the unit controller 51 determines whether or not the increase threshold value calculated in step S106 is smaller than the minimum increase threshold value (S107). If this increase threshold value is smaller than the minimum increase threshold value, the unit controller 51 sets the minimum increase threshold value as the increase threshold value used at the present time (S108). This is shown in FIG. 5 where the increase threshold is always the minimum increase threshold in a portion larger than the maximum package diameter. When the increase threshold calculated in step S106 is larger than the minimum increase threshold, the calculated increase threshold is set as the increase threshold used at the current time.

Next, the unit controller 51 calculates the increased diameter by subtracting the control package diameter from the calculation package 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 rapid increase as described above. In addition, when the control package diameter is larger than the calculation package diameter due to noise or the like, the calculation result is negative, and the increased diameter cannot be calculated. In this case, the update of the control package diameter at the present time is stopped.

Next, the unit control unit 51 determines whether or not the increase diameter calculated in step S109 is larger than the increase threshold set when used at the present time (S110). When the increase diameter is equal to or smaller 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, the unit control unit 51 updates the control package diameter by adding the increase threshold to the current control package diameter (S112).

Further, the unit control unit 51 performs the processing after step S104 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, control relating to winding of the yarn 20 is performed based on the updated control package diameter. As described above, it is possible to update the control package diameter to be large while preventing a sudden increase in the control package diameter.

As described above, the automatic winder 1 according to the embodiment includes the winding unit 18, the detection unit (the yarn length detection sensor 15 and the package rotation sensor 47), and the unit control unit 51. Do the taking method. The winding unit 18 winds the yarn 20 to form the package 30. The detection unit detects values (yarn traveling speed, rotational speed of the package 30) used for calculating the package diameter. The unit controller 51 calculates a calculation package diameter that is a package diameter based on the value detected by the detection unit (calculation step). The unit controller 51 updates the control package diameter, which is the package diameter used in the winding control of the yarn 20, based on the increase in the calculation package diameter (update process). The unit control unit 51 calculates an increase threshold value that changes based on at least one of the yarn 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, the unit control unit 51 increases the control package diameter by an amount corresponding to the increase threshold.

Thus, by providing an increase threshold for updating the control package diameter, it is possible to prevent the control content of the winding of the yarn 20 from changing abruptly. In particular, the effect of updating the control package diameter varies depending on the thread thickness or the control package diameter. Therefore, the control package diameter can be appropriately updated by setting an increase threshold based on these.

Further, in the automatic winder 1 of the above-described embodiment, the minimum increase threshold and the maximum increase threshold are determined as the increase threshold calculated by the unit control unit 51. The unit control unit 51 calculates the increase threshold value so as to be equal to or greater than the minimum increase threshold value and equal to or less than the maximum increase threshold value.

Further, in the automatic winder 1 of the above embodiment, the unit control unit 51 calculates an increase threshold value that changes based on both the yarn thickness and the control package diameter.

Further, in the automatic winder 1 of the above embodiment, the unit controller 51 calculates an initial increase threshold that is an increase threshold to be applied when the control package diameter is minimum based on the yarn thickness.

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 matches the minimum increase threshold based on the thread thickness.

Further, in the automatic winder 1 of the above embodiment, the unit control unit 51 has an initial increase threshold, a control package diameter (minimum package diameter) at the initial increase threshold, a minimum increase threshold, and a minimum increase threshold. Based on the control package diameter (maximum package diameter), the correspondence relationship between the increase threshold and the control package diameter is calculated. The correspondence relationship includes a portion in which the increase threshold value linearly changes as the control package diameter increases.

Further, in the automatic winder 1 of the above embodiment, the unit control unit 51 calculates an increase threshold based on at least the yarn thickness. The minimum increase threshold is constant regardless of the thread thickness.

In the automatic winder 1 of the above embodiment, the unit control unit 51 calculates the yarn thickness based on the input yarn count, and calculates the increase threshold based on the calculated yarn thickness. As another embodiment, the machine control device 90 may calculate the yarn thickness based on the set yarn count and transmit the calculated value to the unit control unit 51.

This eliminates the need for the operator to input the thread thickness directly, thereby reducing operator trouble. Further, when the machine base control device 90 transmits the thread thickness to the unit control unit 51, the labor of the operator can be reduced.

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 if the calculation package diameter is smaller than the control package diameter. The package diameter is not changed.

Although a preferred embodiment of the present invention has been described above, the above configuration can be modified as follows, for example.

In the above embodiment, the relationship between the control package diameter and the increase threshold 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 (smaller side of the increase threshold), and more specifically, is an inversely proportional curve.

In the above embodiment, the unit controller 51 performs the process of updating the control package diameter. Instead of this, the machine control device 90 or another control device may perform the above processing.

As a configuration for obtaining the calculation package diameter, an angle sensor for detecting the angle of the cradle 23 (the 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 controller 51. Since the angle of the cradle 23 changes as the package 30 gets thicker, the calculation package diameter can be obtained by detecting the angle using the angle sensor and performing the calculation. Note that a sensor that detects the rotational speed of the contact roller 29 may be used as the detection unit for obtaining the calculation package diameter. In particular, in a cheese package having the same diameter in the winding axis direction, the rotational speed of the contact roller 29 approximates the peripheral speed of the package. Therefore, the calculation package diameter can be obtained by performing the same processing as in the above embodiment.

A timer capable of measuring the elapsed time can be used as the detection unit for obtaining the calculation package diameter. In this case, the time change of the thickness of the yarn layer is determined in advance by calculation or experience value based on the winding condition. Then, the thickness of the yarn layer is obtained based on the determined value and the measured elapsed time. Then, the diameter of the calculation package is calculated by adding the diameter of the winding tube 22 to the thickness of the yarn layer. This timer can measure the elapsed time in consideration of the time when winding is interrupted due to yarn cutting and yarn cutting.

In the above embodiment, the thread thickness is calculated based on the set yarn count, but the unit controller 51 can also recognize the thread thickness when the operator inputs the thread thickness.

In the above embodiment, both the change of the increase threshold value based on the thread thickness and the change of the increase threshold value based on the control package diameter are performed, but either one may be omitted.

Instead of directly 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.

Further, the present invention is not limited to an automatic winder but can be applied to other yarn winding machines such as a winding machine and a spinning machine (for example, an air spinning machine and an open-end spinning machine).

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 control device (control device)

Claims

A winding unit for winding a yarn to form a package;
A detection unit for detecting a value used for calculating the package diameter;
A control unit;
With
The controller is
Calculate a calculation package diameter which is a package diameter based on the value detected by the detection unit,
Update the control package diameter, which is the package diameter used in the yarn winding control, based on the increase in the calculation package diameter,
Calculating an increase threshold value to change based on at least one of the yarn thickness and the control package diameter,
When the value obtained by subtracting the control package diameter from the arithmetic package diameter exceeds the increase threshold, the control package diameter is increased by an amount corresponding to the increase threshold.
The yarn winding machine according to claim 1,
The increase threshold calculated by the control unit has a minimum increase threshold and a maximum increase threshold,
The control unit calculates the increase threshold so as to be equal to or greater than the minimum increase threshold and equal to or less than the maximum increase threshold.
A yarn winding machine according to claim 2,
The said control part calculates the said increase threshold value from which a value changes based on both the yarn thickness and the said control package diameter, The yarn winding machine characterized by the above-mentioned.
A yarn winding machine according to claim 3,
The said control part calculates the initial increase threshold value which is the said increase threshold value applied when the said control package diameter is the minimum based on a yarn thickness, The yarn winding machine characterized by the above-mentioned.
The yarn winding machine according to claim 4,
The control unit calculates the control package diameter when the increase threshold matches the minimum increase threshold based on a yarn thickness.
A yarn winding machine according to claim 5,
The control unit is based on the initial increase threshold, the control package diameter at the initial increase threshold, the minimum increase threshold, and the control package diameter at the minimum increase threshold. A yarn winding machine, wherein a correspondence relationship between an increase threshold value and the control package diameter is calculated, and the correspondence relationship includes a portion in which the increase threshold value changes linearly as the control package diameter increases.
A yarn winding machine according to any one of claims 2 to 6,
The control unit calculates the increase threshold based on at least a yarn thickness, and the minimum increase threshold is constant regardless of the yarn thickness.
A yarn winding machine according to any one of claims 1 to 7,
The control unit calculates a yarn thickness based on an input yarn count, and calculates the increase threshold based on the calculated yarn thickness.
A yarn winding machine according to any one of claims 1 to 7,
A plurality of winding units;
A control device configured to collectively set the plurality of winding units;
With
The control device calculates a yarn thickness based on an input yarn count, and transmits the calculated yarn thickness to each of the control units included in the plurality of winding units. Take machine.
A yarn winding machine according to any one of claims 1 to 9,
The control unit does not perform a process of reducing the control package diameter and does not change the control package diameter even when the calculation package diameter is smaller than the control package diameter. Yarn winding machine.
In a yarn winding method for winding a yarn to form a package,
A calculation step of calculating a calculation package diameter, which is a package diameter based on the detected value;
An update step of updating a control package diameter, which is a package diameter used in yarn winding control, based on an increase in the calculation package diameter;
A calculation step of calculating an increase threshold value that changes based on at least one of the yarn thickness and the control package diameter;
Including
In the updating step, when the value obtained by subtracting the control package diameter from the calculation package diameter exceeds the increase threshold, the control package diameter is increased by an amount corresponding to the increase threshold. Yarn winding method.