Title of the invention: Thread winder and thread winding method
Technical field
[0001]
　The present invention mainly relates to a thread winder that winds a thread while swinging it to form a package.
Background technology
[0002]
　Conventionally, it has been known that a phenomenon (bulge winding) in which the end face of a package bulges outward in the axial direction occurs when the yarn is wound while being twilled to form a package. This is caused by the fact that the yarn in the middle layer of the package is pressed by the tightening force of the yarn on the outer diameter side and the repulsive force from the take-up pipe, and protrudes outward from the end face of the package in the axial direction. Patent Documents 1 and 2 disclose a thread winder that controls to prevent this bulge winding.
[0003]
　In the thread winder of Patent Document 1, the correction width (end correction width) of the twill swing width can be set in association with the package diameter. This thread winder prevents the occurrence of bulge winding by controlling the twill swing device based on the set correspondence. When winding a cone-shaped package, the thread winder of Patent Document 2 changes the ratio of the twilling speed in the small diameter side region of the package to the twilling speed in the large diameter side region. As a result, the balance of the winding density between the small diameter side region and the large diameter side region changes, so that the occurrence of bulge winding can be reduced. Further, Patent Document 2 describes that the end correction width is changed according to the yarn layer, as in Patent Document 1, in order to more reliably prevent the occurrence of bulge winding.
Prior art literature
Patent documents
[0004]
Patent Document 1: Japanese Patent Application Laid-Open No. 2011-143977
Patent Document 2: Japanese Patent Application Laid-Open No. 2015-178403
Patent Document 3: German Patent Application Publication No. 102005045790
Outline of the invention
Problems to be solved by the invention
[0005]
　In Patent Documents 1 and 2, several points are set in association with the end correction width in association with the package diameter, and the twill swing width is corrected along a polygonal line connecting these points. Therefore, since the inclination of the correction width changes sharply, the twill swing width cannot be changed so as to match the shape of the bulge winding. As a result, the end face of the package has a stepped shape, which may deteriorate the quality of the package. Further, the more points to be set, the less conspicuous the step shape is, and since the configuration is such that the desired bulge correction can be realized, there are many points to be set and it may be complicated. Further, Patent Document 3 describes that the end face of the package is corrected according to the curve of the arc, and the calculation method for determining the curve of the arc is described, but the operator sets the curve of the arc. There is no description about the input method.
[0006]
　The present invention has been made in view of the above circumstances, and its main purpose is to suppress the occurrence of bulge winding, further improve the work efficiency of setting, and also suppress the end face of the package from being stepped. The purpose is to provide a possible thread winder.
Means and effects to solve problems
[0007]
　The problem to be solved by the present invention is as described above, and next, the means for solving this problem and its effect will be described.
[0008]
　According to the first aspect of the present invention, a bobbin winder having the following configuration is provided. That is, this thread winder includes a twill vibration unit, an input unit, a correction line creation unit, and a twill vibration control unit. The twilling portion twills the thread wound around the package. The input unit includes a correction width for correcting the target twill swing width and a winding progress value which is a value that increases with the winding of the yarn and is in a range larger than the start of winding and smaller than the full winding. Accepts the input of only one designated point indicating the correspondence between. The correction line creating unit is a line that passes through the designated point of only one point input to the input unit and shows the correspondence relationship between the correction width and the winding progress value, and at least a part thereof is a curved line. Create a correction line. The twill swing control unit controls the twill swing unit so that the thread is twilled at a value obtained by correcting the target twill swing width with the correction width indicated by the correction line created by the correction line creation unit.
[0009]
　As a result, a curve is included in the correspondence between the correction width and the winding progress value, so that the slope of the correction width gradually changes, at least in the region including the curve. Therefore, the end face of the package is less likely to have a stepped shape, so that the quality of the package can be improved. Further, since the correction line in which the inclination of the correction width changes gently is created only by inputting only one designated point, the work efficiency of setting can be improved without degrading the quality of the package.
[0010]
　In the thread winding machine, it is preferable that the correction line creating unit creates the correction line whose portion from the start of winding to the designated point is a curve.
[0011]
　As a result, the correction line becomes a curved line immediately after the start of winding, which tends to increase the amount of change in the correction width, so that it is possible to more reliably suppress the end face of the package from having a stepped shape.
[0012]
　In the thread winder, it is preferable that the correction line creating unit creates the correction line having a curved line as a whole.
[0013]
　As a result, it is possible to prevent the end face from having a stepped shape in the entire package.
[0014]
　It is preferable that the thread winder is provided with a display unit that displays the correction line created by the correction line creating unit in a graph format.
[0015]
　As a result, the operator can intuitively grasp the change in the correction width of the twill swing width.
[0016]
　In the thread winding machine, the correction line creating unit increases the inclination of the correction line from the start of winding to the designated point, and corrects 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.
[0017]
　As a result, the end face of the package can be made into an ideal shape without bulging by changing the inclination in an appropriate manner in the above two sections.
[0018]
　In the thread winder, it is preferable that the correction line creating unit creates the correction line so that the inclination does not change at the designated point and becomes smooth.
[0019]
　As a result, unlike Patent Document 1, the change in the correction width before and after the designated point becomes smooth, so that it is possible to more reliably prevent the end face of the package from having a stepped shape.
[0020]
　In the thread winder, the correction line creating unit preferably creates the correction line including a curve of an arc or an elliptical arc.
[0021]
　This allows the correction line to include a simple curve.
[0022]
　In the thread winder, it is preferable that the curve of the correction line is described by a trigonometric function.
[0023]
　As a result, various curves can be realized.
[0024]
　According to the second aspect of the present invention, the following thread winding method is provided. That is, in this thread winding method, the thread is wound while swinging to form a package. This thread winding method includes a designated point receiving step, a correction line creating step, and a winding step. In the designated point reception process, the correction width for correcting the target twill swing width and the winding progress in which the value increases with the winding of the yarn and is larger than the start of winding and smaller than the full winding. Accepts the input of only one specified point indicating the correspondence between the value and. In the correction line creating step, a line showing the correspondence between the correction width and the winding progress value passing through the designated point of only one point received in the designated point receiving step, and at least a part of the line is a curve. Create a correction line. In the winding step, the yarn is controlled by controlling the twill swing portion so that the yarn is twilled at a value obtained by correcting the target twill swing width with the correction width indicated by the correction line created in the correction line creation step. Take up.
[0025]
　As a result, since a 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 less likely to have a stepped shape, so that the quality of the package can be improved. Further, since the correction line in which the inclination of the correction width changes gently is created only by inputting only one designated point, the work efficiency of setting can be improved without degrading the quality of the package.
A brief description of the drawing
[0026]
FIG. 1 is a front view of an automatic winder according to an embodiment of the present invention.
FIG. 2 is a front view and a block diagram of the thread winding unit.
FIG. 3 is a cross-sectional view schematically showing the cross-sectional shape of the package when bulge winding occurs, when conventional bulge winding countermeasures are taken, and the package of the present embodiment.
FIG. 4 is a diagram illustrating a target twill swing width and a correction width.
[Fig. 5] A flowchart showing a process of winding a yarn while suppressing the occurrence of bulge winding.
FIG. 6 is a diagram showing a screen for inputting values ​​related to bulge winding correction and a screen on which correction lines are displayed.
FIG. 7 is a diagram showing a correction line created by a thread winder according to a modified example.
Mode for carrying out the invention
[0027]
　Next, an embodiment of the present invention will be described with reference to the drawings. In addition, in this specification, "upstream" and "downstream" mean upstream and downstream in the traveling direction of the yarn at the time of winding.
[0028]
　As shown in FIG. 1, the automatic winder (thread winder) 1 includes a plurality of thread winding units 10 arranged side by side, a ball lifting device 60, and a machine stand control device 90.
[0029]
　Each thread winding unit 10 winds the thread 20 unwound from the thread feeding bobbin 21 on a cone-shaped winding tube 22 supported by a cradle (winding tube support portion) 23, and winds the cone. The shaped package 30 is formed. The cradle 23 includes a small-diameter side support portion that rotatably supports the small-diameter side end portion of the take-up pipe 22, and a large-diameter side support portion that rotatably supports the large-diameter side end portion of the take-up pipe 22. have. The thread winding unit 10 may have a configuration in which the thread 20 is wound around a cylindrical winding tube 22 to form a cheese-shaped package 30.
[0030]
　When the package 30 is fully wound in each thread winding unit 10, the ball lifting device 60 travels to the position of the thread winding unit 10. In the thread winding unit 10, the ball lifting device 60 removes the fully wound package 30 from the cradle 23 and supplies a winding tube 22 in which the thread 20 is not wound.
[0031]
　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 set each thread winding unit 10 by the operator inputting a predetermined set value or selecting an appropriate control method. The machine stand display unit 92 can display a set value input screen, a winding status of the thread 20 of each thread winding unit 10, the content of the trouble that has occurred, and the like.
[0032]
　Next, the configuration of the bobbin winding unit 10 will be specifically described with reference to FIG. As shown in FIG. 2, each thread winding unit 10 includes a winding unit main body 17 and a unit control unit 51.
[0033]
　The unit control unit 51 includes, for example, an arithmetic unit such as a CPU, a RAM, a ROM, an I / O port, and a communication port. A program for controlling each part of the winding unit main body 17 is recorded in this ROM. Further, when a predetermined program is executed by the CPU, the unit control unit 51 functions as a correction line creation unit 52 and a twill vibration control unit 53 (detailed processing thereof will be described later). Each part of the take-up unit main body 17 and the machine base control device 90 are connected to the I / O port and the communication port, and can communicate control information and the like. As a result, the unit control unit 51 can control the operation of each unit included in the winding unit main body 17.
[0034]
　In the winding unit main body 17, in the thread traveling path between the thread feeding bobbin 21 and the contact roller 29, the thread unwinding assisting device 12, the tension applying device 13, and the thread joint are sequentially formed from the thread feeding bobbin 21 side. The device 14, the thread length detection sensor 15, the clearer 16, and the winding unit 18 are arranged.
[0035]
　The thread unwinding assisting device 12 lowers the regulating member 40 that covers the core tube of the thread feeding bobbin 21 in conjunction with the unwinding of the thread 20 from the thread feeding bobbin 21 so that the thread 20 from the thread feeding bobbin 21 is lowered. Assist in unraveling. The regulating member 40 comes into contact with a balloon formed on the upper part of the thread feeding bobbin 21 by the rotation and centrifugal force of the thread 20 unwound from the thread feeding bobbin 21, and the thread 20 is controlled to an appropriate size. Assists in unraveling. In the vicinity of the regulating member 40, a sensor (not shown) for detecting the upper part of the yarn layer of the yarn feeding bobbin 21 is provided. When this sensor detects the lowering of the upper part of the yarn layer, the regulating member 40 is configured to lower accordingly.
[0036]
　The tension applying device 13 applies a predetermined tension to the traveling thread 20. As the tension applying device 13, for example, a gate type in which movable comb teeth are arranged with respect to fixed comb teeth can be used. The comb teeth on the movable side can be rotated by a rotary solenoid so that the comb teeth are in a meshed state or an released state. In addition to the gate type, for example, a disc type can be adopted for the tension applying device 13.
[0037]
　The thread splicing device 14 uses the bobbin thread on the thread feeding bobbin 21 side and the bobbin thread on the package 30 side when the clearer 16 detects a thread defect and cuts the thread, or when the thread breaks during unwinding from the thread feeding bobbin 21. The upper thread and the thread are spliced ​​together. As the thread joining device 14, a mechanical type or a configuration using a fluid such as compressed air can be adopted.
[0038]
　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 amount of fluff of the yarn 20 and calculates the amount of movement of the yarn 20 to detect the yarn length. Specifically, the thread length detection sensor 15 includes a plurality of optical fluff detection units including a light receiving element and a light source along the thread traveling direction. The yarn length detection sensor 15 detects the traveling length of the yarn 20 based on changes in output signals of a plurality of fluff detecting units located at different positions in the yarn traveling direction.
[0039]
　The unit control unit 51 can determine 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 control unit 51 can calculate the twill angle from the yarn running speed calculated based on the yarn running length detected by the yarn length detection sensor 15 and the twill swing speed. Then, the unit control unit 51 calculates the package diameter based on the twill angle, the peripheral speed of the package 30, and the rotation speed of the package 30. The unit control unit 51 can obtain the thickness of the yarn layer by subtracting the diameter of the take-up pipe 22 from the package diameter.
[0040]
　The clearer 16 includes a clearer head 49 in which a sensor (not shown) for detecting the thickness of the thread 20 is arranged, and an analyzer 55 that processes a thread thickness signal from the sensor. The clearer 16 detects a thread defect such as a slab by monitoring the thread thickness signal from the sensor. In the vicinity of the clearer head 49, a cutter (not shown) that cuts the thread 20 immediately when the clearer 16 detects a thread defect is provided.
[0041]
　On the lower and upper sides of the thread splicing device 14, a bobbin thread catching member 25 that captures the thread end of the bobbin thread on the thread feeding bobbin 21 side and guides the thread end to the thread splicing device 14, and the thread end of the upper thread on the package 30 side. A needle thread capturing member (guide member) 26 for capturing the thread and guiding the thread to the thread joining device 14 is provided. The bobbin thread catching member 25 includes a bobbin thread pipe arm 33 and a bobbin thread suction port 32 formed at the tip of the bobbin thread pipe arm 33. The needle thread catching member 26 includes a needle thread pipe arm 36 and a needle thread suction port 35 formed at the tip of the needle thread pipe arm 36.
[0042]
　The bobbin thread pipe arm 33 and the needle thread pipe arm 36 are rotatable about the shaft 34 and the shaft 37, respectively. An appropriate negative pressure source (not shown) is connected to the bobbin thread pipe arm 33 and the needle thread pipe arm 36, respectively. As a result, a suction flow is generated in the bobbin thread suction port 32 and the needle thread suction port 35, and the thread ends of the needle thread and the bobbin thread can be sucked and captured by the bobbin thread pipe arm 33 and the needle thread pipe arm 36, respectively.
[0043]
　The take-up portion 18 includes a cradle 23 that detachably supports the take-up pipe 22, a contact roller 29 that can rotate in contact with the outer peripheral surface of the take-up pipe 22 or the outer peripheral surface of the package 30, and a twill swing arm (twill). A vibration unit) 71 and a twill vibration drive motor 72 are provided.
[0044]
　The cradle 23 can rotate about the rotation shaft 48. As the yarn layer increases as the yarn 20 is wound around the take-up pipe 22, the cradle 23 rotates accordingly. This makes it possible to eliminate the influence of the shape change due to the increase in the thread layer.
[0045]
　A package drive motor 41 is attached to the cradle 23. The take-up pipe 22 is rotationally driven by the package drive motor 41 to wind the yarn 20 around the take-up pipe 22. When the take-up pipe 22 is supported by the cradle 23, the motor shaft of the package drive motor 41 is connected to the take-up pipe 22 so as not to rotate relative to each other (so-called direct drive method). The operation of the package drive motor 41 is controlled by the package drive control unit 42. The package drive control unit 42 adjusts the rotation speed (or its acceleration) of the package drive motor 41 in response to an instruction from the unit control unit 51.
[0046]
　The twill swing arm 71 engages with the thread 20 to twill the thread 20. The twill swing arm 71 is driven by the twill swing drive motor 72. Specifically, the twill swing arm 71 reciprocates continuously in the package width direction (axial direction of the take-up pipe 22 and the package 30) in conjunction with the forward and reverse rotation of the rotor of the twill swing drive motor 72. It is provided in. The operation of the twill drive motor 72 is controlled by the unit control unit 51 via the twill drive control unit 73. For example, a hook-shaped thread guide portion is formed at the tip of the twill swing arm 71. The thread 20 can be twilled by the twill swing arm 71 performing a reciprocating swivel motion while the thread 20 is held by the thread guide portion. A guide plate 28 is provided slightly upstream of the twill swing portion. The guide plate 28 guides the thread 20 on the upstream side to the twill swing portion. With the above configuration, the unwound yarn 20 from the yarn feeding bobbin 21 can be wound to form the package 30.
[0047]
　Next, the process performed by the automatic winder 1 to prevent the occurrence of bulge winding will be described. First, with reference to FIGS. 3 and 4, the occurrence of bulge winding and the countermeasures conventionally taken against it will be described. FIG. 3 is a cross-sectional view schematically showing the cross-sectional shape of the package 30 of the present embodiment when bulge winding occurs, when conventional bulge winding countermeasures are taken, and. FIG. 4 is a diagram illustrating a target twill swing width and a correction width. Further, in the following description, the axial direction of the package 30 (winding pipe 22) is referred to as a package width direction.
[0048]
　Bulge winding is a phenomenon in which the side surface of the package swells, as shown by the chain line in FIG. This is because the thread 20 in the intermediate layer of the package is pressed by the tightening force of the thread 20 on the inner diameter side and the thread 20 on the outer diameter side of the package, and protrudes from the end face of the package. The protrusion length depends on the distance from the surface of the take-up tube 22 (that is, the thickness of the thread layer).
[0049]
　Further, as shown in FIG. 4, the twill swing arm 71 is set to perform twill swing with a target twill swing width determined by conditions other than bulge winding. Therefore, the occurrence of bulge winding can be reduced by reducing the target twill swing width based on the protrusion length due to bulge winding. The length reduced from the target twill swing 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 twill swing width.
[0050]
　However, in the past, when the correspondence between the package diameter and the correction width was shown in the graph, the correction was performed so as to form a polygonal line. On the other hand, the bulge winding is curved as shown by the chain line in FIG. Therefore, when the conventional measures against the bulge winding are taken, the end face of the package 30 may have a stepped shape as shown by the broken line in FIG. 3, and the quality of the package 30 may be deteriorated.
[0051]
　On the other hand, 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 the package 30 in which the occurrence of bulge winding and the stepped shape of the end face are suppressed. .. Hereinafter, description will be made with reference to FIGS. 5 and 6. FIG. 5 is a flowchart showing a process of winding the yarn while suppressing the occurrence of bulge winding. FIG. 6 is a diagram showing a screen for inputting a value related to bulge winding correction and a screen on which correction lines are displayed.
[0052]
　Before winding the yarn 20, the operator performs a predetermined operation on the machine base input unit 91 to display an input screen for inputting a value related 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 the thread layer and the corresponding correction width for one designated point and a box for inputting the thread layer at the end point are displayed.
[0053]
　The designated point is a point where the operator specifies the correspondence between the yarn layer and the correction width. In this specification, there is a correspondence relationship at the start point (when the yarn layer is 0) at the start of winding and at the end (when the required amount of yarn 20 is wound up). The end point is not included in the specified point. In this embodiment, the input of one designated point is accepted. The designated point specified by the operator here corresponds to the peak time of bulge winding (when the protrusion length of the thread 20 is the longest when the bulge winding countermeasure is not taken). Therefore, in general, a value smaller than half of the yarn layer at the time of full winding is input.
[0054]
　Further, in the present embodiment, since it is considered that the yarn layer is 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 specifying a value other than 0 as the correction width at the start of winding may be performed. Further, in the present embodiment, since the correction width is considered to be 0 at the end, the operator is only required to specify the thread layer at the end point. However, a value other than 0 may be specified as the correction width at the end. In addition, the yarn layer at the end is automatically applied (without operator input) based on the preset values ​​of the package 30 (diameter of the take-up pipe, package diameter at the end, etc.). There may be.
[0055]
　In the present embodiment, the operator determines the yarn layer and the correction width at the designated point based on the shape or experience of the bulge winding in the winding performed in advance, and operates the machine base input unit 91 to input. Further, the thread layer at the end is calculated from the specifications of the package 30 to be formed and input by operating the machine stand input unit 91. The automatic winder 1 accepts the value input as described above (S101, designated point acceptance process). When forming different types of packages 30 with a plurality of thread winding units 10 included in the automatic winder 1, the operator inputs a designated point or the like for each type of the package 30. Further, the same processing is performed on the small diameter side. That is, in the present embodiment, the input of one designated point is received 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), and one correction line is created for each. It is a composition.
[0056]
　In the present embodiment, the designated point is input by inputting a specific value using the machine stand input unit 91, but instead of this, for example, on the coordinate space as shown in FIG. A method of designating a point with a mouse pointer, a touch panel, or the like may be used.
[0057]
　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 designated 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 in part. In the present embodiment, the correction line creating unit 52 creates a correction line in which all (from the start of winding to the time of full winding) are curved. Further, as shown in FIG. 6, the length of the thread layer may be different between the start point side than the designated point and the end point side than the designated point, and the curves have different shapes. Hereinafter, the correction line on the start point side of the designated point is referred to as a first curve portion, and the correction line on the end point side of the designated point is referred to as a second curve portion.
[0058]
　In the present embodiment, the first curved portion is an elliptical arc having a central angle of 90 °. Therefore, when the horizontal axis (the axis indicating the length of the thread layer) is 0 ° and the counterclockwise rotation is positive, the first curved portion has an inclination of about 90 ° at the starting point, and is at the designated point. The inclination is 0 °. Further, the inclination of the first curved portion changes significantly in the vicinity of the start point, and the inclination does not change much in the vicinity of the designated point (in other words, the amount of change in the inclination in the first half is the amount of change in the inclination in the latter half). Greater than). The first curved portion is a curve that becomes convex in the direction in which the correction width increases (upward in FIG. 6).
[0059]
　Instead of the above-mentioned first curved portion of the present embodiment, the first curved portion may be an arc having a central angle of 90 °. Further, the central angle may be an arc or an elliptical arc other than 90 °. Further, the slope at the starting point may be smaller than 90 °, or the slope 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 used as the first curved portion. May be good). Further, as shown in FIG. 7C, the first curved portion may be a curve other than an arc. Further, the first curved portion may include a straight line in a part thereof.
[0060]
　In the present embodiment, the second curve portion is a curve whose ratio is changed so as to pass through the designated point and the end point of the arc created by applying a predetermined function based on the designated point. Therefore, the second curved portion is a curve different from the first curved portion. Also, this ratio is not uniform and varies depending on the thread layer. Further, the inclination of the second curved portion is about 90 ° at the designated point, and the inclination at the end point is larger than 90 ° and smaller than 135 °. Therefore, the first curved portion and the second curved portion have the same inclination at the designated point, so that they are smoothly connected. Further, the amount of change in the inclination of the first curved portion (90 °) is larger than the amount of change in the inclination of the second curved portion (less than 90 °). Further, the slope of the second curved portion changes gently in the vicinity of the designated point, and the slope changes significantly 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). Less than quantity). Further, the mode of increasing the first curved portion (how the correction width is increased, specifically, the first derivative value or the second derivative value of the correction width) is different from the decreasing mode of the second curved portion. That is, the mode of increase from the start point to the designated point and the mode of increase from the end point to the designated point are different. The second curved portion is a curve that becomes convex in the direction in which the correction width increases (upward in FIG. 6).
[0061]
　Instead of the above-mentioned second curved portion of the present embodiment, as shown in FIG. 7A, the second curved portion may be an arc or an elliptical arc having a central angle of 90 °. Further, the central angle may be an arc or an elliptical arc other than 90 °. Further, the inclination at the designated point may be smaller than 0 °, or the inclination at the end point may be 90 °. Further, the second curved portion may include a straight line in a part thereof. Further, instead of the second straight line portion, as shown in FIG. 7B, a second straight line portion which is entirely straight may be derived. The second straight line portion in FIG. 7B is a straight line having a constant correction width from the designated point to the end point. Further, the second straight line portion may be configured to connect the designated point and the end point with one straight line.
[0062]
　There are various methods for deriving the functions indicating the first curve portion and the second curve portion, and examples thereof include the following methods. If these curved parts are elliptical arcs or shapes based on elliptical arcs, these curved parts can be derived using the elliptical formula (x 2 / a 2 + y 2 / b 2 = 1). Further, when these curved portions have a trigonometric function or a shape based on the trigonometric function (for example, a sin function or a cos function in which the declination is changed over a predetermined range), the trigonometric function is used for description. Further, the curved portion may be derived by calculating the coefficient based on the designated point and applying the coefficient to the polynomial of degree n.
[0063]
　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 creating unit 52 may have a function of creating correction lines based on a plurality of (for example, two) designated points as shown in FIG. 7 (c). In this case, the operator inputs the thread layers and the correction widths of the two designated points. Then, a correction line that passes through the start point, the two designated points, and the end point and is partially curved is created. The specific shape of the correction line and the derivation method are performed, for example, by combining the above-mentioned processes.
[0064]
　As shown in FIG. 6, the correction line creating unit 52 draws the created correction line in a graph format and displays it on the machine stand display unit 92 (S102). In this graph, not only the correction line but also the positions of the start point, the designated point, and the end point are displayed. Since the start point and the end point are clear, the display may be omitted. As a result, the operator can intuitively grasp what kind of correction line is created based on the designated point. Further, this correction line can be displayed not only at the time of inputting the designated point but also at the start of winding or during winding, for example. In the present embodiment, the correction line creating 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 stand display unit 92, the machine base control device 90 that controls the machine stand display unit 92 also has the same correction line creation unit. 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 creating unit 52.
[0065]
　The display of the correction line in the graph format can be omitted. In this case, the correction line creating unit 52 can omit the creation of the line 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, even if the display of the correction line in the graph format is omitted, the correction line creation unit 52 creates the correction line, and therefore is included in the scope of the present invention. Is done.
[0066]
　Next, the operator performs an appropriate operation on the machine stand input unit 91 and the like of the machine stand control device 90 to start winding the thread 20 (S103). During winding of the yarn 20, the thickness of the yarn layer is calculated by the unit control unit 51 as described above (S104). The twill swing control unit 53 obtains a correction width according to the calculated thread layer based on the correction line created in step S102, and corrects the target twill swing width with the correction width to perform the twill swing arm 71. Control (S105, winding process).
[0067]
　In the present embodiment, since the correspondence between the correction width and the thread layer includes a curve, the slope of the correction width changes gently, at least in the region including the curve. Therefore, it is possible to prevent the end face of the package 30 from having a stepped shape while preventing the occurrence of bulge winding.
[0068]
　Further, the unit control unit 51 detects whether or not the package 30 is fully wound (S106), and the above control (S104 and S105) is performed until the package 30 is fully wound. Then, when the package 30 is full, winding is completed (S107).
[0069]
　As described above, the automatic winder 1 of the above embodiment includes a twill swing arm 71, a machine base input unit 91, a correction line creation unit 52, and a twill swing control unit 53, and is provided with the following thread winding. The thread 20 is wound by the method. The twill swing arm 71 twills the thread 20 wound around the package 30. The machine stand input unit 91 has a correction width for correcting the target twill swing width, and a yarn layer that increases with the winding of the yarn 20 and is larger than the start of winding and smaller than the full winding. Accepts the input of only one specified point indicating the correspondence. The correction line creating unit 52 passes through only one designated point input to the machine stand input unit 91, and is a line indicating the correspondence between the correction width and the thread layer, and at least a part of the correction line is a curved line. create. The twill swing control unit 53 controls the twill swing arm 71 so that the thread 20 is twilled with a value obtained by correcting the target twill swing width with the correction width indicated by the correction line created by the correction line creation unit 52. The thread layer or package diameter at the time of full winding is set by a separate setting item as in the conventional case.
[0070]
　As a result, since the correspondence between the correction width and the yarn layer includes a curve, the slope of the correction width gradually changes, at least in the region including the curve. Therefore, the end face of the package 30 is less likely to have a stepped shape, so that the quality of the package 30 can be improved. Further, since the correction line in which the inclination of the correction width changes gently is created only by inputting only one designated point, the work efficiency of the setting can be improved without degrading the quality of the package 30.
[0071]
　Further, in the automatic winder 1 of the above embodiment, the correction line creating unit 52 creates a correction line in which at least the portion from the start of winding to the designated point is a curve.
[0072]
　As a result, the correction line becomes a curved line immediately after the start of winding, which tends to increase the amount of change in the correction width, so that it is possible to more reliably suppress that the end face of the package 30 has a stepped shape.
[0073]
　In the automatic winder 1 of the above embodiment, the correction line creating unit 52 creates a correction line having a curved line as a whole.
[0074]
　As a result, it is possible to prevent the end face from becoming stepped in the entire package 30.
[0075]
　The automatic winder 1 of the above embodiment includes a machine stand display unit 92 that displays the correction lines created by the correction line creation unit 52 in a graph format.
[0076]
　As a result, the operator can intuitively grasp the change in the correction width of the twill swing width.
[0077]
　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.
[0078]
　As a result, it is possible to prevent the end face of the package 30 from having a stepped shape while reducing the trouble of inputting the set points.
[0079]
　In the automatic winder 1 of the above embodiment, the correction line creating unit 52 increases the inclination of the correction line from the start of winding to the designated point and the inclination of the correction line from the full winding to the designated point. And are different.
[0080]
　As a result, the end face of the package 30 has an ideal shape without bulging by changing the inclination in an appropriate manner in the above two sections.
[0081]
　In the automatic winder 1 of the above embodiment, the correction line creating unit 52 creates a correction line so that the inclination does not change at the designated point and becomes smooth.
[0082]
　As a result, unlike Patent Document 1, the change in the correction width before and after the designated point becomes smooth, so that it is possible to more reliably prevent the end face of the package 30 from having a stepped shape.
[0083]
　In the automatic winder 1 of the above embodiment, the correction line creating unit 52 creates a correction line including a curve of an arc or an elliptical arc.
[0084]
　This allows the correction line to include a simple curve.
[0085]
　In the automatic winder 1 of the above embodiment, the curve of the correction line is described by a trigonometric function.
[0086]
　As a result, various curves can be realized.
[0087]
　Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.
[0088]
　In the above embodiment, the unit control unit 51 performs both the process of creating the correction line and the process of obtaining and applying the correction width from the correction line. Instead of this, at least one of the above two processes may be performed by the machine base control device 90 or another control device (for example, a control device dedicated to twill swing).
[0089]
　In the above embodiment, the machine console control device 90 performs both a process of accepting an input at a designated point and a process of displaying a correction line in a graph format. Instead of this, at least one of the above two processes may be performed by the unit control unit 51 or another control device (for example, a control device dedicated to twill swing).
[0090]
　An angle sensor for detecting the angle of the cradle 23 (rotation angle around the rotation shaft 48) may be used as a configuration for determining the thickness of the thread layer of the package 30. This angle sensor is composed of, for example, a rotary encoder, and transmits an angle signal corresponding to the angle of the cradle 23 to the unit control unit 51. Since the angle of the cradle 23 changes as the package 30 rolls up, the 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 take-up pipe 22 from the package diameter. As a method for detecting the thread layer, an appropriate configuration such as an analog sensor or an absolute sensor can be used in addition to the angle sensor.
[0091]
　As a configuration for obtaining the thread 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 empirical value based on the winding conditions. Then, the thickness of the yarn layer is obtained based on the determined value and the measured elapsed time. It should be noted that this timer can measure the elapsed time in consideration of the time during which winding is interrupted due to thread cutting and thread breakage.
[0092]
　In the above embodiment, the correction width is changed according to the thickness of the thread layer, but if the traverse speed ratio is changed according to the winding progress value, which is a value that increases with winding, It is also possible to use a thickness other than the thickness of the thread layer. For example, instead of the thickness of the yarn layer, the package diameter, the length of the wound yarn 20 (thread length), the winding time, or the like can be used. In this case, the designated point input by the operator is also the package diameter, the yarn length, or the winding time instead of the yarn layer.
[0093]
　Instead of directly rotating and driving the package 30 with the package drive motor 41, the package 30 may be driven to rotate by the rotation of the contact roller 29.
[0094]
　Instead of the arm-type twill swing arm 71 of the above embodiment, for example, a belt-type twill swing guide can be used.
[0095]
　Further, the present invention can be applied not only to an automatic winder but also to other yarn winders such as a rewinding machine and a spinning machine (for example, an air spinning machine and an open-end spinning machine).
Code description
[0096]
　1 Automatic winder (pincushion winder)
　10 Pincushion unit
　30 Package
　51 Unit control unit
　52 Correction line creation unit
　53 Twill
　swing control unit 71 Twill swing arm (Twill swing part)
　91 Machine stand input unit (input unit)
The scope of the claims
[Claim 1]
　The twill swing part that twills the thread wound on the package, the
　correction width that corrects the target twill swing width, and the value that increases with the winding of the thread, which is larger than the start of winding and from the time of full winding. The
　correction width passes through the input unit that accepts the input of only one designated point indicating the correspondence between the winding progress value in a small range and the designated point of only one point input to the input unit. A correction line creating unit that creates a correction line that is a line showing the correspondence between the winding progress value and at least a part of the curve, and the
　correction width indicated by the correction line created by the correction line creating unit. A yarn winder comprising: a twill swing control unit that controls the twill swing portion so that the yarn is twilled at a value corrected by the target twill swing width
.
[Claim 2]
　The thread winding machine according to claim 1,
　wherein 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. Machine.
[Claim 3]
　The thread winder according to claim 2,
　wherein the correction line creating unit creates the correction line having a curved line as a whole.
[Claim 4]
　The thread winder according to any one of claims 1 to 3, further
　comprising a display unit for displaying the correction line created by the correction line creating unit in a graph format. ..
[Claim 5]
　The thread
　winder according to any one of claims 1 to 4, wherein the correction line creating unit increases the inclination of the correction line from the start of winding to the designated point, and full winding. A spooling machine characterized in that the mode of increasing the inclination of the correction line of the correction line from time to the designated point is different from that of the mode.
[Claim 6]
　The thread winder according to any one of claims 1 to 5,
　wherein the correction line creating unit creates the correction line so that the inclination does not change at the designated point and becomes smooth. A bobbin winder featuring.
[Claim 7]
　The thread winder according to any one of claims 1 to 6,
　wherein the correction line creating unit creates the correction line including a curve of an arc or an elliptical arc.
[Claim 8]
　The thread winder according to any one of claims 1 to 7,
　wherein the curve of the correction line is described by a trigonometric function.
[Claim 9]
　In the thread winding method in which the thread is wound while twisting to form a package,
　the correction width for correcting the target twill swing width and the value that increases with the winding of the thread are larger than at the start of winding and are fully wound. The designated point reception process that accepts the input of only one designated point indicating the correspondence between the winding progress value in a range smaller than the time, and the
　designated point receiving process of only one point received in the designated point receiving process. As shown
　above, a correction line creating step of creating a correction line showing a correspondence relationship between the correction width and the winding progress value and having at least a part of a curve, and the correction line created in the correction line creating step. A yarn
winding method comprising a winding step of winding a yarn so that the yarn is twilled at a value corrected by the correction width indicated by .