WO2019150869A1

WO2019150869A1 - Thread winding machine and thread winding method

Info

Publication number: WO2019150869A1
Application number: PCT/JP2018/048091
Authority: WO
Inventors: 勝文牟田
Original assignee: 村田機械株式会社
Priority date: 2018-01-31
Filing date: 2018-12-27
Publication date: 2019-08-08
Also published as: CN111601764A; CN111601764B; JP2019131375A

Abstract

An automatic winder (thread winding machine) comprises a traverse unit, an input unit, a correction line creation unit, and a traverse control unit. The traverse unit moves a thread to be wound onto a package side to side. The input unit accepts input for only one specified point that indicates the correspondence between a correction width to correct a target traverse width and a winding advance value, which is a value that increases as the thread is wound and that is within a range of values larger than the value when winding starts and smaller than the value when winding completes. The correction line creation unit creates a correction line that is a line indicating the correspondence between the correction width and the winding advance value with at least a portion thereof being a curved line passing through the only one specified point that was input to the input unit. The traverse control unit controls the traverse unit so that the thread is moved side to side by the value that is the target traverse width corrected by the correction width indicated by the correction line created by the correction line creation unit.

Description

Yarn winding machine and yarn winding method

The present invention mainly relates to a yarn winding machine that forms a package by winding a yarn while traversing the yarn.

Conventionally, it is known that when a package is formed by winding a yarn while traversing the yarn, a phenomenon that the end face of the package bulges outward in the axial direction (bulge winding) occurs. This is caused by the fact that the yarn in the intermediate layer of the package is pressed out by the tightening force of the yarn on the outer diameter side and the repulsive force from the take-up tube and protrudes from the package end surface to the outside in the axial direction. Patent Documents 1 and 2 disclose a yarn winding machine that performs control for preventing this bulge winding.

In the yarn winding machine of Patent Document 1, the traversing width correction width (end portion correction width) can be set in association with the package diameter. This yarn winding machine prevents the occurrence of bulge winding by controlling the traverse device based on the set correspondence. In the case of winding a cone-shaped package, the yarn winding machine of Patent Document 2 changes the ratio of the traverse speed of the small-diameter side region and the traverse speed of the large-diameter side region of the package. Thereby, since the balance of the winding density of a small diameter side area | region and a large diameter side area | region changes, generation | occurrence | production of a bulge winding can be reduced. Moreover, in patent document 2, in order to prevent generation | occurrence | production of a bulge winding more reliably, like patent document 1, it describes changing an edge part correction width | variety according to a thread layer.

JP 2011-143977 A JP 2015-178403 A German Patent Application No. 102005045790

In Patent Documents 1 and 2, several end correction widths are set in association with the package diameter, and the traversing width is corrected along the broken line connecting these points. For this reason, since the inclination of the correction width changes steeply, the traversing width cannot be changed to match the shape of the bulge winding. As a result, the end face of the package has a step shape, and the quality of the package may be deteriorated. Further, as the number of points to be set increases, the step shape becomes less conspicuous and the desired bulge correction can be realized. Patent Document 3 describes that the end face of the package is corrected in accordance with an arc curve, and a calculation method for determining the arc curve is described, but the arc curve setting by the operator is described. There is no description regarding the input method.

The present invention has been made in view of the above circumstances, and its main purpose is to suppress the occurrence of bulge winding and further improve the work efficiency of the setting, and also prevent the end face of the package from being stepped. It is to provide a possible yarn winding machine.

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 traverse unit, an input unit, a correction line creation unit, and a traverse control unit. The traverse unit traverses the yarn wound around the package. The input section includes a correction width for correcting the target traversing width, a winding progress value that is a value that increases with winding of the yarn and that is in a range that is larger than that at the start of winding and smaller than that at the time of full winding. The input of only one designated point indicating the correspondence relationship is accepted. The correction line creation unit is a line that passes through the specified point of only one point input to the input unit and indicates a correspondence relationship between the correction width and the winding progress value, and at least a part thereof is a curve. Create a correction line. The traverse control unit controls the traverse unit so that the yarn is traversed with a value obtained by correcting the target traverse width with the correction width indicated by the correction line created by the correction line creation unit.

Thereby, since a curve is included in the correspondence between the correction width and the winding progress value, the inclination of the correction width gradually changes at least in a region including the curve. Therefore, the end face of the package is unlikely to have a step shape, so that the quality of the package can be improved. In addition, since a correction line in which the inclination of the correction width changes gently by inputting only one designated point, the setting work efficiency can be improved without degrading the quality of the package.

In the yarn winding machine, it is preferable that the correction line creating unit creates the correction line in which at least a portion from the start of winding to the designated point is a curve.

This makes it possible to more reliably suppress the end face of the package from becoming a step shape since the correction line becomes a curve immediately after the start of winding that tends to increase the amount of change in the correction width.

In the above-described yarn winding machine, it is preferable that the correction line creation unit creates the correction line that is a curve as a whole.

This makes it possible to suppress the end surface from being stepped in the entire package.

The yarn winding machine preferably includes a display unit that displays the correction line created by the correction line creation unit in a graph format.

This allows the operator to intuitively grasp the change in the correction width of the traverse width.

In the yarn winding machine, the correction line creating unit increases the inclination of the correction line from the start of winding to the designated point and the correction of the correction line from the full winding to the designated point. It is preferable that the mode of increasing the slope of the line is different.

This allows the end face of the package to have an ideal shape without swelling by changing the inclination in an appropriate manner in the above two sections.

In the above-described yarn winding machine, it is preferable that the correction line creation unit creates the correction line that is smooth without changing the inclination at the designated point.

Thus, unlike in Patent Document 1, the change in the correction width before and after the designated point becomes smooth, so that the end face of the package can be more reliably prevented from being stepped.

In the yarn winding machine, it is preferable that the correction line creation unit creates the correction line including an arc or an elliptic curve.

This allows a simple curve to be included in the correction line.

In the yarn winding machine, it is preferable that the curve of the correction line is described by a trigonometric function.

This makes it possible to realize various curves.

According to the second aspect of the present invention, the following yarn winding method is provided. That is, in this yarn winding method, the yarn is wound while traversing to form a package. This yarn winding method includes a designated point receiving step, a correction line creating step, and a winding step. In the designated point receiving step, a correction width for correcting the target traverse width and a winding progress that is a value that increases with the winding of the yarn and that is larger than the winding start and smaller than the full winding. An input of only one designated point indicating a correspondence relationship with a value is accepted. In the correction line creation step, a line indicating the correspondence between the correction width and the winding progress value is passed through only one designated point received in the designated point receiving step, and at least a part is a curve. Create a correction line. In the winding step, the yarn is controlled by controlling the traverse unit so that the yarn is traversed at a value in which the target traversing width is corrected by the correction width indicated by the correction line created in the correction line creating step. Wind up.

Thereby, since the curve is included in the correspondence between the correction width and the winding progress value, the correction width gradually changes at least in the region including the curve. Therefore, the end face of the package is unlikely to have a step shape, so that the quality of the package can be improved. In addition, since a correction line in which the inclination of the correction width changes gently by inputting only one designated point, the setting work efficiency can be improved without degrading the quality of the package.

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. Sectional drawing which shows typically the cross-sectional shape of the package of this embodiment at the time of bulge winding generation | occurrence | production, the countermeasure against the conventional bulge winding, and this embodiment. The figure explaining a target traverse width and a correction width. The flowchart which shows the process which winds a thread | yarn, suppressing generation | occurrence | production of a bulge winding. The figure which shows the screen which inputs the value regarding correction | amendment of a bulge winding, and the screen where the correction line was displayed. The figure which shows the correction line produced with the yarn winding machine which concerns on a modification.

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, a doffing device 60, and a machine base control device 90 arranged side by side.

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 perform setting for each yarn winding unit 10 by an operator inputting a predetermined set value or selecting 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 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. Further, the unit control unit 51 functions as a correction line creation unit 52 and a traverse control unit 53 by executing a predetermined program by the CPU (detailed processing will be described later). 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. A device 14, a yarn length detection sensor 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 thickness of the yarn layer of the package 30 by using the running 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. 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 unit controller 51 can determine the thickness of the yarn layer by subtracting the diameter of the winding tube 22 from the package diameter.

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.

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, processing performed by the automatic winder 1 to prevent the occurrence of bulge winding will be described. First, the occurrence of bulge winding and countermeasures conventionally taken against it will be described with reference to FIGS. FIG. 3 is a cross-sectional view schematically showing a cross-sectional shape of the package 30 of the present embodiment when bulge winding occurs, when a conventional bulge winding countermeasure is taken, and when this is the case. FIG. 4 is a diagram for explaining the target traverse width and the correction width. In the following description, the axial direction of the package 30 (winding tube 22) is referred to as a package width direction.

Bulge winding is a phenomenon in which the side surface of the package swells as shown by the chain line in FIG. This occurs because the yarn 20 of the intermediate layer of the package is pressed by the tightening force of the yarn 20 on the inner diameter side and the yarn 20 on the outer diameter side of the package and protrudes from the end surface of the package. This protrusion length depends on the distance from the surface of the winding tube 22 (that is, the thickness of the yarn layer).

As shown in FIG. 4, the traverse arm 71 is set to traverse with a target traverse width determined by conditions other than bulge winding. Therefore, the occurrence of bulge winding can be reduced by reducing the target traverse width based on the protruding length due to bulge winding. The length that is reduced from the target traverse width is hereinafter referred to as a correction width. Since bulge winding occurs on both end faces of the package 30, it is preferable to set the correction width at both ends of the target traversing width.

However, conventionally, corrections have been performed so that the correspondence between the package diameter and the correction width becomes a polygonal line when shown in the graph. On the other hand, the bulge winding is curved as shown by the chain line in FIG. Therefore, when conventional measures are taken against bulge winding, the end face of the package 30 has a step shape as shown by the broken line in FIG. 3, and the quality of the package 30 may be lowered.

In contrast, by taking measures against bulge winding by the method of the present embodiment, as shown by the solid line in FIG. 3, it is possible to form a package 30 in which the occurrence of bulge winding and the step shape of the end surface are suppressed. . Hereinafter, a description will be given with reference to FIGS. 5 and 6. FIG. 5 is a flowchart showing a process for winding a yarn while suppressing the occurrence of bulge winding. FIG. 6 is a diagram showing a screen for inputting values relating to bulge winding correction and a screen on which correction lines are displayed.

The operator performs a predetermined operation on the machine base input unit 91 before winding the yarn 20 to display an input screen for inputting a value relating to correction on the large diameter side for suppressing the occurrence of bulge winding. . This input screen is displayed on the lower side of FIG. On the input screen, a box for inputting a yarn layer and a correction width corresponding to it for one designated point and a box for inputting a yarn layer at the end point are displayed.

Specified point is a point where the operator specifies the correspondence between the yarn layer and the correction width. In addition, in this specification, it is the correspondence of the start point which is a correspondence at the time of winding start (when a yarn layer is 0), and the end (at the time of full winding which wound up the required amount of yarn 20). The end point is not included in the specified point. In this embodiment, it is the structure which receives the input of one designated point. Here, the designated point designated by the operator corresponds to the peak time of bulge winding (when the protruding length of the yarn 20 is longest when no bulge winding countermeasure is taken). Therefore, generally, a value smaller than half of the yarn layer at full winding is input.

In this embodiment, since the yarn layer is assumed to be 0 and the correction width is 0 at the start of winding, the operator is not required to specify the start point. Instead of this process, a process capable of designating a value other than 0 as the correction width at the start of winding may be performed. In this embodiment, since the correction width is considered to be 0 at the end, the operator is only required to specify the end yarn layer. However, the configuration may be such that a value other than 0 can be designated as the correction width at the end. Further, the yarn layer at the end is automatically applied (without operator input) based on the preset values of the package 30 (the diameter of the winding tube and the package diameter at the end). There may be.

In this embodiment, the operator determines the yarn layer and the correction width of the designated point based on the shape or experience of the bulge winding in the winding performed in advance, and operates and inputs the machine base input unit 91. Further, the yarn layer at the end is calculated from the specifications of the package 30 to be formed and is input by operating the machine base input unit 91. The automatic winder 1 receives the value input as described above (S101, designated point reception step). Note that when different types of packages 30 are formed by the plurality of yarn winding units 10 included in the automatic winder 1, the operator inputs a designated point or the like for each type of package 30. Similar processing is also performed on the small diameter side. That is, in the present embodiment, for each of the small-diameter side and the large-diameter side (for the first end portion and the second end portion in the package width direction), one input of one designated point is received and one correction line is created. It is a configuration.

In the present embodiment, the designated point is input by inputting a specific value using the machine base input unit 91, but instead, for example, on a coordinate space as shown in FIG. A method of designating a point with a mouse pointer or a touch panel may be used.

Based on the value input by the operator, the correction line creation unit 52 of the unit control unit 51 creates a correction line that interpolates the start point, the specified point, and the end point (S102, correction line creation step). The correction line creation unit 52 creates a correction line including a curve at least partially. In the present embodiment, the correction line creation unit 52 creates a correction line that is entirely curved (from the start of winding to the full winding). Further, as shown in FIG. 6, the length of the yarn layer may be different between the start point side from the designated point and the end point side from the designated point, and the curves have different shapes. Hereinafter, the correction line closer to the start point than the designated point is referred to as a first curve portion, and the correction line closer to the end point than the designated point is referred to as a second curve portion.

In the present embodiment, the first curved portion is an elliptical arc having a central angle of 90 °. Accordingly, the first curve portion has an inclination at the start point of about 90 ° when the horizontal axis (axis indicating the length of the yarn layer) is 0 ° and the counterclockwise rotation is positive, and the first curve portion is at the designated point. The inclination is 0 °. In addition, the slope of the first curve portion changes greatly in the vicinity of the start point, and the slope does not change much in the vicinity of the designated point (in other words, the change amount of the slope in the first half portion is the change amount of the slope in the second half portion). Bigger than). The first curve portion is a curve that protrudes in the direction in which the correction width increases (upward in FIG. 6).

Instead of the first curved portion of the present embodiment described above, the first curved portion may be an arc having a central angle of 90 °. Further, it may be an arc or an elliptic arc whose center angle is other than 90 °. Further, the inclination at the starting point may be smaller than 90 °, or the inclination at the designated point may be larger than 0 ° (in other words, a part of an arc or elliptical arc having a central angle of 90 ° is defined as the first curve portion). Also good). Further, the first curve portion may be a curve other than an arc as shown in FIG. Moreover, the 1st curve part may contain the straight line in part.

In the present embodiment, the second curve portion is a curve in which the ratio is changed so as to pass through the designated point and the end point with respect to an arc created by applying a predetermined function based on the designated point. Therefore, the second curve portion is a different curve from the first curve portion. Further, this ratio is not uniform and varies depending on the yarn layer. The second curve portion has an inclination at the designated point of about 90 °, and an inclination at the end point is greater than 90 ° and smaller than 135 °. For this reason, the first curve portion and the second curve portion have the same inclination at the designated point, and thus are smoothly connected. Furthermore, the amount of change in the inclination of the first curve portion (90 °) is larger than the amount of change in the inclination of the second curve portion (less than 90 °). In addition, the slope of the second curve portion changes gently in the vicinity of the designated point, and the slope changes greatly in the vicinity of the end point (in other words, the amount of change in the slope in the first half is the change in the slope in the second half. Smaller than the amount). Further, the increase mode of the first curve portion (how the correction width increases, specifically, the first differential value or the second differential value of the correction width) is different from the decrease mode of the second curve portion. That is, the increase mode from the start point to the specified point is different from the increase mode from the end point to the specified point. Further, the second curve portion is a curve that protrudes in the direction in which the correction width increases (upward in FIG. 6).

Instead of the second curved portion of the present embodiment described above, as shown in FIG. 7A, the second curved portion may be a circular arc or an elliptical arc having a central angle of 90 °. Further, it may be an arc or an elliptic arc whose center angle is other than 90 °. Further, the inclination at the designated point may be smaller than 0 °, and the inclination at the end point may be 90 °. Moreover, the 2nd curve part may contain the straight line in part. Further, instead of the second straight line portion, as shown in FIG. 7B, a second straight line portion that is a straight line as a whole may be derived. The second straight line portion in FIG. 7B is a straight line having a constant correction width from the specified point to the end point. Moreover, as a 2nd straight line part, the structure which connects a designated point and an end point with one straight line may be sufficient.

There are various methods for deriving the functions indicating the first curve portion and the second curve portion. For example, the following methods can be given. When these curved portions are elliptical arcs or shapes based on elliptical arcs, these curved portions can be derived using an elliptical formula (x ² / a ² + y ² / b ² = 1). In addition, when these curved portions are trigonometric functions or shapes based thereon (for example, sin function or cos function in which the declination is changed over a predetermined range), they are described using trigonometric functions. Moreover, the structure by which these curve parts are derived | led-out may be sufficient by calculating a coefficient based on a designated point and applying the said coefficient to an n-th order polynomial.

The correction line creation unit 52 of the present embodiment can create a correction line from only one set designated point. In addition to this function, the correction line creation unit 52 may have a function of creating a correction line based on a plurality of (for example, two) designated points as shown in FIG. In this case, the operator inputs the yarn layer and the correction width at the two designated points. Then, a correction line that partially passes through the start point, the two specified points, and the end point is created. Note that a specific correction line shape and derivation method are performed by, for example, combining the processes described above.

The correction line creation unit 52 draws the created correction line in a graph format and displays it on the machine base display unit 92 as shown in FIG. 6 (S102). In this graph, not only the correction line but also the positions of the start point, the specified point, and the end point are displayed. Since the start point and end point are clear, the display may be omitted. As a result, the operator can intuitively understand what correction line has been created based on the designated point. Further, this correction line can be displayed not only at the time of inputting a specified point, but also at the start of winding or during winding, for example. In the present embodiment, the correction line creation unit 52 is provided in the unit control unit 51. However, in order to draw the correction line created as described above in a graph format and display it on the machine base display unit 92, a similar correction line creation unit is also included in the machine base control device 90 that controls the machine base display unit 92. is necessary. Therefore, in the present embodiment, the machine base control device 90 is also provided with a control mechanism corresponding to the correction line creation unit 52.

In addition, the display of the correction line in the graph format can be omitted. In this case, the correction line creation unit 52 can omit the creation of a diagram for displaying the correction line in the graph format, but it is necessary to create a function or the like for determining the correction width. Since this function is the correction line itself, the correction line creation unit 52 creates the correction line even when the display of the correction line in the graph format is omitted, and thus is included in the scope of the present invention. It is.

Next, the operator performs an appropriate operation on the machine base input unit 91 and the like of the machine base control device 90 to start winding the yarn 20 (S103). During winding of the yarn 20, as described above, the thickness of the yarn layer is calculated by the unit controller 51 (S104). The traverse control unit 53 obtains a correction width corresponding to the calculated yarn layer based on the correction line created in step S102, and sets the traverse arm 71 with a value obtained by correcting the target traverse width with the correction width. Control (S105, winding process).

In the present embodiment, since a curve is included in the correspondence between the correction width and the yarn layer, at least in the region including the curve, the inclination of the correction width changes gently. Therefore, it is possible to prevent the end face of the package 30 from being stepped while preventing the occurrence of bulge winding.

Further, the unit controller 51 detects whether or not the package 30 is full (S106), and the above control (S104 and S105) is performed until the package 30 is full. Then, when the package 30 becomes full, the winding is finished (S107).

As described above, the automatic winder 1 of the above embodiment includes the traverse arm 71, the machine base input unit 91, the correction line creation unit 52, and the traverse control unit 53, and the following yarn winding The yarn 20 is wound up by the method. The traverse arm 71 traverses the yarn 20 wound around the package 30. The machine base input unit 91 includes a correction width for correcting the target traversing width, and a yarn layer that increases with the winding of the yarn 20 and is in a range that is larger than the start of winding and smaller than the full winding. An input of only one designated point indicating the correspondence is accepted. The correction line creation unit 52 passes through only one designated point input to the machine base input unit 91, and shows a correction line that shows a correspondence relationship between the correction width and the yarn layer and at least a part of which is a curve. create. The traverse control unit 53 controls the traverse arm 71 so that the yarn 20 is traversed with a value obtained by correcting the target traverse width with the correction width indicated by the correction line created by the correction line creation unit 52. Note that the yarn layer or the package diameter at the time of full winding is set by a separate setting item as in the prior art.

Thereby, a curve is included in the correspondence relationship between the correction width and the yarn layer, so that the slope of the correction width gradually changes at least in a region including the curve. Therefore, the end face of the package 30 is less likely to have a step shape, so that the quality of the package 30 can be improved. In addition, since a correction line in which the inclination of the correction width changes gently by inputting only one designated point, the setting work efficiency can be improved without degrading the quality of the package 30.

Further, in the automatic winder 1 of the above-described embodiment, the correction line creation unit 52 creates a correction line in which at least a portion from the start of winding to the designated point is a curve.

This makes it possible to more reliably suppress the end face of the package 30 from having a step shape since the correction line becomes a curve immediately after the start of winding in which the amount of change in the correction width tends to increase.

In the automatic winder 1 of the above embodiment, the correction line creation unit 52 creates a correction line that is a curve as a whole.

Thereby, it can suppress that an end surface becomes a step shape in the whole package 30. FIG.

The automatic winder 1 according to the embodiment includes the machine base display unit 92 that displays the correction line created by the correction line creation unit 52 in a graph format.

In the automatic winder 1 of the above embodiment, the machine base input unit 91 accepts only one designated point in the yarn layer in a range larger than that at the start of winding and smaller than that at full winding. The correction line creation unit 52 creates a correction line based on only one designated point.

Thereby, it is possible to suppress the end face of the package 30 from being stepped while reducing the labor of inputting the set point.

In the automatic winder 1 of the above embodiment, the correction line creation unit 52 increases the inclination of the correction line from the start of winding to the specified point and increases the inclination of the correction line from the full winding to the specified point. And is different.

Thus, by changing the inclination in an appropriate manner in the above two sections, the end face of the package 30 becomes an ideal shape without swelling.

In the automatic winder 1 of the above-described embodiment, the correction line creation unit 52 creates a correction line that is smooth without changing the inclination at the designated point.

Thereby, unlike in Patent Document 1, the change in the correction width before and after the designated point becomes smooth, so that the end face of the package 30 can be more reliably prevented from being stepped.

In the automatic winder 1 of the above-described embodiment, the correction line creation unit 52 creates a correction line including an arc or elliptical arc curve.

This allows a simple curve to be included in the correction line.

In the automatic winder 1 of the above embodiment, the curve of the correction line is described by a trigonometric function.

This makes it possible to realize various curves.

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 unit control unit 51 performs both the process of creating a correction line and the process of obtaining and applying a correction width from the correction line. Instead, a configuration in which at least one of the two processes described above is performed by the machine base control device 90 or another control device (for example, a control device dedicated to traverse) may be employed.

In the above-described embodiment, the machine control device 90 performs both the process of receiving an input of a designated point and the process of displaying a correction line in a graph format. Instead of this, a configuration in which at least one of the two processes described above is performed by the unit controller 51 or another control device (for example, a control device dedicated for traversing) may be employed.

As a configuration for obtaining the thickness of the yarn layer of the package 30, 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 package diameter can be detected by detecting the angle with the angle sensor. Then, the thickness of the yarn layer of the package 30 can be calculated by subtracting the diameter of the winding tube 22 from the package diameter. As a method for detecting the yarn layer, in addition to the angle sensor, an appropriate configuration such as an analog sensor or an absolute sensor can be used.

As a configuration for obtaining the yarn layer of the package 30, 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 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. 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 correction width is changed according to the thickness of the yarn layer, but if the traverse speed ratio is changed according to the winding progress value that is a value that increases with winding, Other than the thickness of the thread layer can also be used. For example, instead of the thickness of the yarn layer, the package diameter, the length of the wound yarn 20 (yarn length), the winding time, or the like can be used. In this case, the designated point input by the operator also becomes the package diameter, the yarn length, or the winding time instead of the yarn layer.

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.

For example, a belt-type traverse guide can be used instead of the arm-type traverse arm 71 of the above embodiment.

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 (yarn winding machine)
DESCRIPTION OF SYMBOLS 10 Thread winding unit 30 Package 51 Unit control part 52 Correction line creation part 53 Traverse control part 71 Traverse arm (traverse part)
91 Machine stand input section (input section)

Claims

A traverse section for traversing the yarn wound around the package;
Correspondence relationship between the correction width for correcting the target traverse width and the winding progress value that is a value that increases with winding of the yarn and that is in a range that is larger than that at the start of winding and smaller than that at the time of full winding. An input unit for receiving an input of only one designated point shown;
A correction line that passes through the specified point of only one point input to the input unit and that shows a correspondence relationship between the correction width and the winding progress value and at least a part of which is a curve is a correction line The creation department;
A traverse control unit that controls the traverse unit so that the yarn is traversed at a value in which the target traverse width is corrected with the correction width indicated by the correction line created by the correction line creation unit;
A yarn winding machine comprising:
The yarn winding machine according to claim 1,
The yarn winding machine, wherein the correction line creation unit creates the correction line having a curved line at least from the start of winding to the designated point.
A yarn winding machine according to claim 2,
The yarn winding machine, wherein the correction line creation unit creates the correction line which is a curve as a whole.
A yarn winding machine according to any one of claims 1 to 3,
A yarn winding machine comprising: a display unit that displays the correction line created by the correction line creation unit in a graph format.
A yarn winding machine according to any one of claims 1 to 4,
The correction line creation unit, the increasing aspect of the inclination of the correction line from the start of winding to the specified point, the increasing aspect of the inclination of the correction line of the correction line from the full winding to the specified point, Yarn winding machine characterized by different
A yarn winding machine according to any one of claims 1 to 5,
The yarn winding machine according to claim 1, wherein the correction line creation unit creates the correction line so as to be smooth without changing the inclination at the designated point.
A yarn winding machine according to any one of claims 1 to 6,
The yarn winding machine, wherein the correction line creation unit creates the correction line including an arc or elliptical arc curve.
A yarn winding machine according to any one of claims 1 to 7,
A yarn winding machine, wherein the curve of the correction line is described by a trigonometric function.
In a yarn winding method of winding a yarn while traversing to form a package,
Correspondence relationship between the correction width for correcting the target traverse width and the winding progress value that is a value that increases with winding of the yarn and that is in a range that is larger than that at the start of winding and smaller than that at the time of full winding. A designated point receiving process for receiving input of only one designated point shown;
Correction that creates a correction line that passes through the specified point of only one point received in the specified point receiving step and shows a correspondence relationship between the correction width and the winding progress value, at least a part being a curve Line creation process,
A winding step of winding the yarn so that the yarn is traversed at a value in which the target traversing width is corrected with the correction width indicated by the correction line created in the correction line creating step;
A yarn winding method comprising: