JP2012250810A - Thread winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thread winder that effectively prevents bulge from being formed by changing a lead angle to form a conical package of a predetermined shape, while preventing the lead angle from being incorrectly set.SOLUTION: An automatic winder (thread winder) includes a winding part, a lead angle pattern storage part, and a winding control part. The winding part forms a conical package by winding a thread around a winding bobbin. The lead angle pattern storage part stores a lead angle pattern obtained by associating a thickness of a thread layer of the package with the lead angle. The winding control part controls the winding part so that the thread is wound at the lead angle determined on the basis of the lead angle pattern stored in the lead angle pattern storage part.

Description

  The present invention mainly relates to a yarn winding device that winds a yarn while traversing the yarn.

  2. Description of the Related Art Conventionally, a yarn winding device is known in which a winding bobbin is rotatably supported by a cradle and a package is formed by winding the yarn while traversing the outer peripheral surface of the bobbin. Among this type of yarn winding device, as shown in Patent Document 1, there is a configuration in which the twill angle is changed according to the winding thickness of the package.

  The yarn winding device disclosed in Patent Document 1 includes a package diameter sensor that can detect a package diameter, a traverse device, and a traverse control unit that controls the traverse device. The traverse control unit prevents bulges and the like by changing the traverse speed (changing the traverse angle) according to the detected package diameter. In Patent Document 1, no particular mention is made of the shape of the package, but a cheese-shaped package is depicted in the drawing.

  As described above, the yarn winding device may perform control to change the winding method according to the change in the package diameter (according to the progress of the winding operation). However, in the cone-winding package, the package diameter varies depending on the position in the winding width direction. For this reason, in a cone winding package, control for changing the winding method is usually performed in accordance with the change in the package diameter at the end portion on the large diameter side.

  In Patent Document 2, the yarn layer is divided into an outermost layer portion and an inner layer portion based on the winding thickness of the package (thickness of the yarn layer) instead of the package diameter, and the twill angle when the outermost layer portion is rolled up, and the inner layer portion The structure which controls so that a twill angle when winding up may become a predetermined ratio is disclosed. The yarn winding device does not directly detect the thickness of the yarn layer, but estimates the thickness of the yarn layer according to the elapsed time and changes the traverse angle according to the estimated value. is there.

JP 2007-204191 A JP-A-3-288769

  By the way, when performing the control which suppresses a bulge, in order to determine the setting value required for the said control, the trial winding of a package may be performed before a winding operation | work. In this case, the operator forms a trial winding package by simply winding the yarn around the bobbin without bulge suppression control, and after actually examining how the bulge appears in the trial winding package, A twill angle pattern indicating how to change the twill angle according to the winding thickness is determined. In addition, since the operator knows how the bulge appears from the experience value based on the yarn type and the winding condition, the operator may set the predicted value and determine the traverse pattern. Then, a winding operation is performed based on the determined twill angle pattern.

  Here, in the cone-winding package, the bulge tends to be larger on the small diameter side than on the large diameter side. Therefore, when determining the above-mentioned twill angle pattern, it is desirable to determine the twill angle with respect to the package diameter on the small diameter side. However, as described above, a cone winding package generally has a configuration in which a large-diameter side package diameter is associated with a set value. For this reason, in the conventional configuration, it is necessary to determine the twill angle with respect to the package diameter on the large diameter side while looking at the bulge on the small diameter side, causing confusion to the operator and causing a setting error.

  Further, since the configuration of Patent Document 2 is a configuration that determines the winding thickness of the package based on the elapsed time, the configuration cannot be applied to a yarn winding device having a configuration in which the winding operation is interrupted by, for example, yarn joining. . In addition, in Patent Document 2, an item in the industrial application field describes that the technology is related to a cheese-shaped or corn-shaped package, but the content disclosed in the embodiment and the like is a cheese-shaped package. However, the cone-shaped package is not disclosed.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a yarn winding capable of forming a cone winding package having a desired shape by effectively suppressing the occurrence of a bulge by changing the twill angle. An object of the present invention is to provide a configuration that is less prone to setting mistakes in the twill angle.

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 an aspect of the present invention, a yarn winding device having the following configuration is provided. That is, the yarn winding device includes a winding unit, a twill pattern storage unit, and a winding control unit. The winding unit winds a thread around a winding tube to form a cone winding package. The twill angle pattern storage unit stores a twill angle pattern in which a thickness of the yarn layer of the package is associated with a twill angle. The winding control unit controls the winding unit so that the yarn is wound at a twill angle determined based on a twill angle pattern stored in the twill angle pattern storage unit.

  Thus, since the thickness of the yarn layer does not depend on the position in the winding width direction, after trial winding when determining the twill angle pattern, for example, only the thickness of the yarn layer on the small diameter side and the package shape on the small diameter side are referred to. The twill angle pattern can be determined by (no need to refer to the large diameter side). Accordingly, it is possible to reduce setting errors of the twill pattern. Further, the thickness of the yarn layer can be obtained simply by measuring the distance from the outer peripheral surface of the winding tube. Therefore, the thickness of the yarn layer can be obtained as a simple and highly accurate value as compared with the package diameter. Therefore, by creating a twill angle pattern using the thickness of the yarn layer and winding the yarn based on the twill angle pattern, the twill angle can be controlled with high accuracy.

  In the yarn winding device, it is preferable that the traverse angle pattern storage unit can store the thickness of the yarn layer at an arbitrary position in the winding width direction of the package and the traverse angle in association with each other.

  As a result, the twill angle can be set in association with the thickness of the yarn layer at an arbitrary position in the winding width direction (for example, the end portion on the large diameter side, the end portion on the small diameter side, and the central portion). In addition, it is possible to control the traverse angle with high accuracy according to demand.

  In the yarn winding device, the twill angle pattern storage unit can store the thickness of the yarn layer at the end of the small diameter side in the winding width direction of the package and the twill angle in association with each other. It is preferable.

  Thereby, since it becomes possible to set a twill angle pattern using the thickness of the yarn layer on the small diameter side where bulges are likely to occur, the occurrence of bulges can be accurately suppressed.

  The yarn winding device preferably has the following configuration. That is, the yarn winding device includes an operation unit capable of inputting a twill pattern. The twill pattern storage unit stores a twill pattern input by the operation unit.

  Thus, for example, the winding unit can perform the winding operation of the package based on the twill angle pattern determined by the experience of the operator.

  The yarn winding device preferably has the following configuration. That is, the yarn winding device includes an operation unit and a calculation unit. The operation section can be operated to input an adjustment value for determining the yarn layer thickness at full winding, the initial value of the twill angle, and the change amount of the twill angle. The calculation unit calculates a twill angle pattern based on a value input by the operation unit. The twill pattern storage unit stores the twill pattern calculated by the calculation unit.

  As a result, the winding unit performs the winding operation of the package on the basis of the valid twill angle pattern calculated based on the minimum input contents while omitting the time and effort for the operator to determine the twill angle pattern and input. It can be carried out.

  The yarn winding device preferably includes a display unit that displays a twill pattern stored in the twill pattern storage unit.

  As a result, the operator can appropriately confirm the set twill pattern.

  The yarn winding device preferably has the following configuration. That is, the winding unit includes a package driving unit, a traversing unit, and a driving unit. The package driving unit rotationally drives the package. The traverse part traverses the yarn wound around the package. The traverse drive unit drives the traverse unit independently of the package drive unit.

  Thereby, since the yarn winding device can drive the traverse unit independently of the rotation of the package, the control for changing the traverse angle can be easily performed.

The front view of the automatic winder which concerns on one Embodiment of this invention. The front view and block diagram of a winder unit. The schematic side view of a traverse apparatus. The schematic front view of a traverse apparatus. The schematic diagram which shows the cross-sectional shape of the package obtained by trial winding. The figure which shows the input content for making a calculation part calculate a twill angle pattern and a twill angle pattern. The graph which shows the example of a setting of the twill angle with respect to thread layer thickness.

  Next, embodiments of the invention will be described. First, an overall configuration of an automatic winder (yarn winding device) 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a front view of an automatic winder 1 according to an embodiment of the present invention. 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, an automatic winder (yarn winding device) 1 includes a plurality of winder units 10 arranged side by side, an automatic doffing device 80, and a machine base control device 90 as main components. .

  Each winder unit 10 is configured such that the package 30 can be formed by winding the yarn 20 unwound from the yarn supplying bobbin 21 while traversing the yarn 20.

  The automatic doffing device 80 can travel to the position of the winder unit 10 when the package 30 is full in each winder unit 10, collect the full package 30, and supply empty bobbins. It is configured as follows.

  The machine base control device 90 includes an operation unit 91 and a display unit 92 as main components. The operation unit 91 can perform settings for each winder unit 10 by an operator inputting a predetermined set value or selecting an appropriate control method. The display unit 92 is configured to be able to display the winding state of the yarn 20 of each winder unit 10 and the content of the trouble that has occurred.

  Next, a detailed configuration of the winder unit 10 will be described with reference to FIG. FIG. 2 is a front view and a block diagram of the winder unit.

  As shown in FIG. 2, each winder unit 10 includes a winding unit main body 16 and a unit control unit 50.

  The unit controller 50 includes, for example, a CPU and a ROM. The ROM stores a program for controlling each configuration of the winding unit main body 16. The CPU executes a program stored in the ROM. The unit control unit 50 includes a calculation unit 71, a twill pattern storage unit 72, and a winding control unit 73. These detailed configurations will be described later.

  The winding unit main body 16 includes a yarn unwinding assisting device 12 and a tension applying unit in order from the yarn feeding bobbin 21 in a yarn traveling path between the yarn feeding bobbin 21 and the winding bobbin (winding tube) 22. A device 13, a splicer device 14, a yarn length detection sensor 61, a clearer (yarn quality measuring device) 15, and a winding unit 17 are arranged.

  The yarn unwinding assisting device 12 brings the regulating member 40 into contact with a balloon formed on the yarn feeding bobbin 21 by swinging the yarn 20 to be unwound from the yarn feeding bobbin 21, and the balloon is appropriately sized. It is for assisting the unwinding of the yarn 20 by controlling to. An unillustrated sensor for detecting the chase portion of the yarn feeding bobbin 21 is provided in the vicinity of the restricting member 40. When this sensor detects the descent of the chase portion, the restricting member 40 is followed accordingly. For example, it can be lowered by an air cylinder (not shown).

  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 device in which movable comb teeth 37 are arranged with respect to fixed comb teeth 36 can be used. The movable comb teeth 37 can be rotated by, for example, a solenoid 38 configured in a rotary manner so that the comb teeth are in a meshed state or a released state. The tension applying device 13 can apply a certain tension to the wound yarn 20 to improve the quality of the package 30. In addition to the gate type, for example, a disk type can be adopted as the tension applying device 13.

  The splicer device 14 detects the yarn defect when the clearer 15 detects a yarn defect and cuts the yarn 20 with the cutter 39, or when the yarn breaks during unwinding from the yarn feeding bobbin 21, or the like. The yarn and the upper yarn on the package 30 side are spliced together. As a yarn joining device for joining such an upper yarn and a lower yarn, a mechanical device, a device using a fluid such as compressed air, or the like can be used.

  The yarn length detection sensor 61 is a device that detects the yarn length of the yarn 20 wound around the package 30 in a non-contact manner. The yarn length detection sensor 61 is configured to detect the fluff amount of the yarn 20, calculate the movement amount of the yarn 20, and detect the yarn length. Specifically, the yarn length detection sensor 61 includes a plurality of optical fluff detection units including a light receiving element and a light source along the yarn traveling direction. Then, the running length of the yarn 20 is detected based on the change in the output signal of the fluff detection unit at a different position in the yarn running direction.

  The clearer 15 includes a clearer head 49 in which a sensor (not shown) for detecting the thickness of the yarn 20 is disposed, and an analyzer 53 that processes a yarn thickness signal from the sensor. The clearer 15 is configured to detect 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 39 for cutting the yarn 20 immediately when the clearer 15 detects a yarn defect is provided. The analyzer 53 may be provided in the unit controller 50.

  On the lower side and the upper side of the splicer device 14, the lower yarn guide pipe 25 that catches the lower yarn on the yarn feeding bobbin 21 and guides it to the splicer device 14, and the upper yarn on the package 30 side is caught. And an upper thread guide pipe 26 for guiding the upper thread. Further, the lower thread guide pipe 25 and the upper thread guide pipe 26 are configured to be rotatable about shafts 33 and 35, respectively. A suction port 32 is formed at the tip of the lower thread guide pipe 25, and a suction mouth 34 is provided at the tip of the upper thread guide pipe 26. Appropriate negative pressure sources are connected to the lower thread guide pipe 25 and the upper thread guide pipe 26, respectively, and a suction flow is generated in the suction port 32 and the suction mouth 34 so that the thread ends of the upper thread and the lower thread are moved. It is comprised so that aspiration capture | acquisition can be carried out.

  The winding unit main body 16 can be driven and rotated in contact with a cradle 23 that removably supports a winding bobbin (paper tube, core tube) 22 and a peripheral surface of the winding bobbin 22 or a peripheral surface of the package 30. And a contact roller 29. Further, the winding unit main body 16 is provided with an arm type traverse device 27 for traversing the yarn 20 to the surface of the package 30 in the vicinity of the cradle 23. The traverse device 27 traverses the yarn 20 by the traverse device 27 to the package 30. The yarn 20 can be wound up.

  The winding unit 17 includes a cradle 23, a package drive motor (package drive unit) 41, and a traverse device 27 as main components.

  The cradle 23 includes a small-diameter side support arm 23 a that supports the small-diameter side of the cone-shaped (tapered) winding bobbin 22, and a large-diameter side support arm 23 b that supports the large-diameter side of the winding bobbin 22. Have. The cradle 23 is configured to rotatably support the cone-shaped winding bobbin 22 by gripping the cone-shaped winding bobbin 22 with the small-diameter side support arm 23a and the large-diameter side support arm 23b. ing.

  The cradle 23 is configured to be rotatable about a rotation shaft 48, and the cradle 23 is rotated by an increase in the yarn layer diameter of the package 30 associated with the winding of the yarn 20 around the winding bobbin 22. It can be absorbed by. In other words, even if the yarn layer diameter of the package 30 is changed by winding the yarn 20, the surface of the package 30 can be appropriately brought into contact with the contact roller 29. Further, the cradle 23 and the traverse device 27 are configured to be able to form a cone-shaped package 30 as shown in FIG. 2 by winding the yarn 20 around the cone-shaped winding bobbin 22.

  A package drive motor 41 composed of a servo motor is attached to the cradle 23, and the winding bobbin 22 is rotated by the package drive motor 41, whereby the surface of the take-up bobbin 22 (or the package 30). The thread 20 is wound around the surface). When the winding bobbin 22 is supported by the cradle 23, the motor shaft of the package driving motor 41 is connected to the winding bobbin 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 unit controller 50. Note that a package drive motor control unit independent of the unit control unit 50 may be provided, and the operation of the package drive motor 41 may be controlled by the package drive motor control unit.

  Next, the traverse device 27 will be described. The traverse device 27 includes a traverse arm (traverse portion) 28, a traverse arm drive motor (traverse drive portion) 45, and a yarn guide member 52 as main components. 3 and 4 are a schematic side view and a front view of the traverse device 27, respectively.

  The traverse arm 28 is configured as an elongated arm configured to be rotatable around a support shaft. The traverse guide 11 is connected to the tip of the traverse arm 28. The traverse guide 11 is configured in a hook shape so that the thread 20 can be engaged therewith. On the other hand, the base end side of the traverse arm 28 is fixed to the drive shaft 45 a of the traverse arm drive motor 45. The traverse arm drive motor 45 is for driving the traverse arm 28, and is constituted by a servo motor. As the servo motor, for example, an appropriate motor such as a brushless DC motor, a stepping motor, a voice coil motor, or the like can be used.

  The traverse device 27 drives the traverse arm drive motor 45 in a state in which the yarn 20 is engaged with the traverse guide 11 to reciprocate the traverse arm 28 as indicated by the arrows in FIG. The swing guide 11 is reciprocated left and right (in the winding width direction of the package 30) to traverse the yarn 20 to the package surface in the left and right direction. Thus, the yarn 20 is wound around the winding bobbin 22 while traversing to a predetermined winding width at a predetermined speed, and a yarn layer formed on the outer peripheral surface of the winding bobbin 22 is formed at a desired density. be able to.

  The operation of the traverse arm drive motor 45 is controlled by the winding control unit 73. However, the operation of the traverse arm drive motor 45 may be controlled by the unit controller 50, or may be controlled by providing a dedicated traverse controller. Further, a yarn guide member 52 is disposed upstream of the traverse guide 11 in the yarn traveling direction. The yarn guide member 52 can capture the yarn 20 by the traverse guide 11 by bending the yarn path of the upstream yarn 20 toward the contact roller 29 in the yarn traveling direction with respect to the yarn guide member 52. It is for guiding as much as possible.

  Further, as shown in FIG. 3, the drive shaft 45a of the traverse arm drive motor 45 is upstream of the yarn guide member 52 when viewed in the direction of a straight line connecting one end side and the other end side of the traverse stroke. It is arranged so that the angle is nearly parallel to the yarn path of the side yarn 20 (so that the extension line of the drive shaft 45a and the yarn path of the yarn 20 form an acute angle). Further, when viewed in the direction of a straight line connecting one end side and the other end side of the traverse stroke, an imaginary line connecting the base end portion of the traverse arm 28 and the traverse guide 11 is more than the yarn guide member 52. The upstream yarn 20 is arranged so as to be substantially orthogonal to the extension line of the yarn path. Here, the yarn path of the yarn 20 is substantially perpendicular to the installation surface of the winder unit 10 (in the present embodiment, a horizontal surface). Therefore, in the automatic winder 1 of the present embodiment, the traverse guide 11 is configured to reciprocate in a plane substantially parallel to the installation surface of the winder unit 10 (horizontal plane in the present embodiment).

  Next, processing performed by the automatic winder 1 to suppress the occurrence of bulges will be described with reference to FIGS. FIG. 5 is a schematic diagram showing a cross-sectional shape of the package 30 obtained by trial winding. FIG. 6 is a diagram illustrating input contents for causing the calculation unit 71 to calculate a twill angle pattern and a twill angle pattern. FIG. 7 is a graph showing a setting example of the twill angle with respect to the yarn layer thickness.

  When the yarn 20 is wound under the new winding conditions, first, a test winding for confirming the bulge occurrence is performed. In this trial winding, naturally, processing for suppressing the occurrence of bulges described later is not performed.

  By this trial winding, as shown by the solid line in FIG. 5, a package 30 having a shape in which the side surface swells is formed. Hereinafter, this bulge of the side surface is referred to as a bulge. The bulge is generated because the intermediate layer yarn 20 of the package 30 is pressed by the tightening force of the outer diameter side yarn 20 and the repulsive force from the take-up bobbin 22 and protrudes from the end surface of the package 30. The amount of protrusion depends on the distance from the surface of the take-up bobbin 22 (thickness of the yarn layer). In the case of the cone-shaped package 30, it is known that the bulge appears more noticeably on the small diameter side than on the large diameter side (the influence of the bulge is greater).

  Next, the operator measures the shape of the package 30 obtained by the test winding, and determines a twill angle pattern based on the measurement result. The twill angle pattern indicates how the twill angle (see twill angle θ shown in FIG. 4) is changed in accordance with the progress of winding. In the present embodiment, the twill angle is an inclination angle of the yarn 20 on the package 30 with respect to a vertical line with respect to the axis of the winding bobbin 22. However, the crossing angle between the yarn 20 and the yarn 20 may be a twill angle. However, in this case, the numerical value of the angle illustrated in the present embodiment is different.

  Here, conventionally, when the cone-shaped package 30 is formed, a twill angle pattern in which a large diameter side package diameter is associated with a twill angle has been used. In such a conventional twill angle pattern, in order to effectively suppress the occurrence of the bulge on the small diameter side, which is greatly influenced by the bulge, the large diameter is observed while checking the degree of the bulge appearing on the small diameter side in the trial winding package. Since it is necessary to determine the twill angle with respect to the package diameter on the side, the time and effort of conversion are complicated, and setting errors are increased. Further, when measuring the large-diameter side package diameter, the protruding end of the winding bobbin 22 or the like may be in the way, and accurate measurement may be difficult. Moreover, when the package end on the large diameter side varies depending on the yarn layer, such as taper winding, the package diameter is different (the same is true on the small diameter side).

  In this regard, in the present embodiment, a twill angle pattern in which the thickness of the yarn layer is associated with the twill angle is used. Since the thickness of the yarn layer does not depend on the position in the winding width direction, the twill pattern can be determined simply by referring to the thickness of the yarn layer on the small diameter side and the package shape on the small diameter side (refer to the large diameter side). No need). Further, the thickness of the yarn layer in the package 30 can be easily obtained by measuring the distance from the outer peripheral surface of the winding bobbin 22. Therefore, the operator applies the ruler to the side surface (especially, the side surface on the small diameter side) of the yarn layer in a state where the ruler is oriented perpendicularly to the outer peripheral surface of the winding bobbin 22 in the trial winding package. It is possible to check how many mm of yarn layer protrusion (bulge) appears from the surface of the bobbin 22 and specify the twill pattern as it is. Accordingly, direct designation is possible when setting the twill angle pattern, and the occurrence of a setting error as described above can be prevented.

  In the present embodiment, the twill pattern can be set by two methods. First, the operator determines a twill angle pattern based on the comparison result between the thickness of the yarn layer and the bulge shape, and the determined twill angle pattern (for example, the contents shown in FIG. 6A) is displayed on the operation unit 91. It is a method of inputting manually by using. The twill angle pattern input here is stored in the twill angle pattern storage unit 72 of each winder unit 10.

  In the second setting method, first, based on the comparison result between the yarn layer thickness and the bulge shape, the operator sets the final yarn layer thickness, which is the thickness of the yarn layer when fully wound, and the twill angle to be set. And a twill angle adjustment value that is a value for determining the change amount of the twill angle is determined (see FIG. 6B). Then, the operator operates the operation unit 91 to input the determined value. This input content is output to the calculation unit 71 of each winder unit 10. The calculation unit 71 can automatically generate a twill pattern (contents as shown in FIG. 6A) for suppressing bulges from the three values input as described above by calculation. Note that the parameters corresponding to the yarn layer thicknesses of 20 mm and 70 mm in FIG. 6A are calculated by appropriately using relational expressions or the like that are obtained theoretically or empirically and stored in advance in the calculation unit 71. The The created twill pattern is stored in the twill pattern storage 72 of each winder unit 10.

  The twill pattern is set as described above. The operator operates the operation unit 91 to display the set twill pattern on the display unit 92 in a table format as shown in FIG. 6A, or in a graph format as shown in FIG. Can be displayed. Thereby, the operator can confirm the set twill pattern appropriately.

  Then, the winding control unit 73 controls the winding unit 17 to wind the yarn 20 based on the twill pattern stored in the twill pattern storage unit 72. Hereinafter, the control performed by the winding control unit 73 based on the twill angle pattern shown in FIG. 7 will be described. The winding control unit 73 first controls the traverse device 27 (specifically, the traverse arm driving motor 45) so that the traverse angle becomes 12.5 ° (initial value of the traverse angle), and the winding unit 17 Thus, the yarn 20 is wound up.

  The winding control unit 73 also detects the yarn length detected by the yarn length detection sensor 61 at a predetermined period during winding of the yarn 20 and the type (number of yarns) 20 set in advance in the machine control device 90 and the like. Etc.), the thickness of the yarn layer of the package 30 is obtained. The winding control unit 73 controls the traverse device 27 so that the twill angle increases as the thickness of the yarn layer increases. And after the thickness of the obtained yarn layer reaches 20 mm, the winding control unit 73 stops the control to increase the traverse angle, and the traverse device 27 is set so that the traverse angle is maintained at 14.5 °. Control.

  The winding control unit 73 controls the traverse device 27 so that the traverse angle decreases as the thickness of the yarn layer increases after the obtained thickness of the yarn layer reaches 70 mm. By performing the above control, the winder unit 10 can form the package 30 in which the occurrence of bulge is effectively suppressed.

  In general, when the traversing part and the package can be driven independently, from the viewpoint of winding control, various settings and controls are performed using the package diameter in the central part in the winding width direction of the package. It may be desirable to do so. On the other hand, when the package has a cone shape as described above, various settings and controls are generally performed using the package diameter on the large diameter side. Therefore, as in the present embodiment, when the traverse arm 28 and the package 30 can be driven independently and the package 30 has a cone shape, the position of the package diameter in the winding width direction is used. There is a problem that it is difficult to understand whether the control is performed and the operator is confused. In this regard, in the present embodiment, since the control is performed using the thickness of the yarn layer whose value does not change depending on the position in the winding width direction, the operator can be prevented from being confused.

  As described above, the automatic winder 1 of the present embodiment includes the winding unit 17, the twill pattern storage unit 72, and the winding control unit 73. The winding unit 17 winds the yarn 20 around the winding bobbin 22 to form a cone-shaped package 30. The twill angle pattern storage unit 72 stores a twill angle pattern in which the thickness of the yarn layer of the package 30 is associated with the twill angle. The winding control unit 73 controls the winding unit 17 so that the yarn 20 is wound at a twill angle determined based on the twill angle pattern stored in the twill angle pattern storage unit 72.

  Thus, since the thickness of the yarn layer does not depend on the position in the winding width direction, after trial winding when determining the twill angle pattern, for example, only the thickness of the yarn layer on the small diameter side and the package shape on the small diameter side are referred to. The twill angle pattern can be determined by (no need to refer to the large diameter side). Accordingly, it is possible to reduce setting errors of the twill pattern. Further, the thickness of the yarn layer can be obtained by simply measuring the distance from the outer peripheral surface of the winding bobbin 22. Therefore, the thickness of the yarn layer can be obtained as a simple and highly accurate value as compared with the package diameter. Accordingly, by creating a twill pattern using the thickness of the yarn layer and winding the yarn 20 based on the twill angle pattern, the twill angle can be controlled with high accuracy.

  Further, in the automatic winder 1 of the present embodiment, the twill angle pattern storage unit 72 stores the thickness of the yarn layer at the position of the end on the small diameter side in the winding width direction of the package 30 and the twill angle in association with each other. To do.

  Thereby, since it becomes possible to set a twill angle pattern using the thickness of the yarn layer on the small diameter side where bulges are likely to occur, the occurrence of bulges can be accurately suppressed.

  The automatic winder 1 according to the present embodiment includes an operation unit 91 that can perform an operation of inputting a twill pattern. The twill angle pattern storage unit 72 stores the twill angle pattern input by the operation unit 91.

  Thereby, the automatic winder 1 can perform the winding operation of the package 30 based on, for example, the twill pattern determined by the operator's experience.

  The automatic winder 1 according to the present embodiment includes an operation unit 91 and a calculation unit 71. The operation unit 91 can input an adjustment value for determining the thickness of the yarn layer at the time of full winding, the initial value of the twill angle, and the amount of change of the twill angle. The calculation unit 71 calculates a twill angle pattern based on the value input by the operation unit 91. The twill pattern storage unit 72 stores the twill pattern calculated by the calculation unit 71.

  As a result, the winding unit 17 takes up the winding of the package 30 based on the valid twill pattern calculated based on the minimum input contents while omitting the operator's trouble of determining and inputting the twill pattern. Work can be done.

  Moreover, the automatic winder 1 of this embodiment includes a display unit 92 that displays a twill pattern stored in the twill pattern storage unit 72.

  As a result, the operator can appropriately confirm the set twill pattern.

  In the automatic winder 1 of the present embodiment, the winding unit 17 includes a package drive motor 41, a traverse arm 28, and a traverse arm drive motor 45. The package drive motor 41 rotates the package 30. The traverse arm 28 traverses the yarn 20 wound around the package 30. The traverse arm drive motor 45 drives the traverse arm 28 independently of the package drive motor 41.

  Thereby, since the automatic winder 1 can drive the traverse arm 28 independently of the rotation of the package 30, it is possible to easily perform control for changing the traverse angle.

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

  The operation unit 91 and the display unit 92 are not limited to the configuration provided in the machine base control device 90, and may be provided for each winder unit 10. Further, the calculation unit 71 and the twill angle pattern storage unit 72 are not limited to the configuration provided for each winder unit 10, and may be provided in the machine base control device 90.

  In the above-described embodiment, the thickness of the yarn layer of the package 30 is calculated based on the yarn length detected by the yarn length detection sensor 61 and the winding condition set in the machine control device. Alternatively, for example, the relationship between the yarn length and the thickness of the yarn layer of the package 30 (which can be obtained empirically) is stored in advance, so that the above calculation is omitted. it can.

  Further, 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) can be used. The angle sensor is composed of, for example, a rotary encoder, and is configured to transmit an angle signal corresponding to the angle of the cradle 23 to the unit controller 50. 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 bobbin 22 from the package diameter. As a method for detecting the package diameter, in addition to the angle sensor, an appropriate configuration such as one using an analog sensor or an absolute sensor can be used.

  Further, as a configuration for obtaining the thickness of 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. Note that this timer can measure the elapsed time in consideration of the time when winding is interrupted due to yarn cutting or yarn breakage.

  In addition to the above, the thickness of the yarn layer of the package 30 can be obtained by using the running length of the yarn 20 detected by the yarn length detection sensor 61. Specifically, the traverse angle can be calculated from the yarn traveling speed calculated based on the yarn traveling length detected by the yarn length detection sensor 61 and the traverse speed. Then, the package diameter is calculated based on the twill angle, the peripheral speed of the package 30, and the rotational speed of the package 30. Then, the thickness of the yarn layer can be obtained by subtracting the diameter of the winding bobbin 22 from the package diameter.

  In the above embodiment, a general cone winding package has been described as an example. However, the present invention can be applied to a cone winding package having a tapered end surface, for example.

  The traverse device 27 is provided with a belt-type traverse device that reciprocates the traverse guide left and right by belt driving, a rotary traverse device that uses rotating blades, and a traverse guide instead of the arm-type traverse device as described above. A rod-type traverse device or the like configured to reciprocate the rod that has been moved may be used.

  Further, as described above, the traverse device 27 is not limited to the configuration in which the traverse arm 28 is driven to reciprocate in a substantially horizontal plane with respect to the device installation surface. For example, as in Patent Document 1 (Japanese Patent Laid-Open No. 2007-204191), a configuration in which the longitudinal direction of the traverse arm is substantially perpendicular to the apparatus installation surface (conventional configuration) may be used.

  The package drive motor 41 is not limited to a servo motor, and various motors such as a step motor and an induction motor can be used. Further, the contact roller 29 may be driven by an appropriate driving device so that the package 30 is driven to rotate.

  In the above embodiment, the twill angle pattern in which the thickness of the yarn layer at the end portion on the small diameter side is associated with the twill angle is used, but instead of the thickness of the yarn layer on the small diameter side, for example, the yarn on the large diameter side A twill pattern corresponding to the thickness of the yarn layer at any position, such as the thickness of the layer and the thickness of the yarn layer at the center in the winding width direction, can be used. Further, the twill pattern can be configured to be set with an appropriate curve, for example, a polynomial curve, instead of being set as a polygonal line as shown in FIG.

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

1 Automatic winder (yarn winding device)
10 Winder unit 17 Winding unit 27 Traverse device 28 Traverse arm (traverse unit)
30 Package 41 Package drive motor (package drive unit)
45 Traverse arm drive motor (traverse drive unit)
71 Calculation unit 72 Twill angle pattern storage unit 73 Winding control unit

Claims (7)

A winding unit for winding a thread around a winding tube to form a cone-shaped package;
A twill pattern storage unit that stores a twill pattern that associates the thickness of the yarn layer of the package with the twill angle;
A winding control unit that controls the winding unit so that the yarn is wound at a twill angle determined based on the twill angle pattern stored in the twill angle pattern storage unit;
A yarn winding device comprising: The yarn winding device according to claim 1,
The yarn winding device, wherein the twill angle pattern storage unit can store the thickness of the yarn layer at any position in the winding width direction of the package and the twill angle in association with each other. The yarn winding device according to claim 2,
The yarn winding device characterized in that the twill angle pattern storage unit can store the thickness of the yarn layer at the position of the end on the small diameter side in the winding width direction of the package and the twill angle in association with each other. . A yarn winding device according to any one of claims 1 to 3,
Equipped with an operation unit that allows you to input a twill pattern,
The yarn winding device, wherein the twill angle pattern storage unit stores a twill angle pattern input by the operation unit. A yarn winding device according to any one of claims 1 to 3,
An operation unit capable of inputting an adjustment value for determining the thickness of the yarn layer when fully wound, the initial value of the twill angle, and the amount of change of the twill angle;
A calculation unit that calculates a twill pattern based on a value input by the operation unit;
With
The yarn winding device, wherein the twill pattern storage unit stores the twill pattern calculated by the calculation unit. A yarn winding device according to any one of claims 1 to 5,
A yarn winding device comprising a display unit for displaying a twill pattern stored in the twill pattern storage unit. The yarn winding device according to any one of claims 1 to 6,
The winding unit is
A package driving unit for rotationally driving the package;
A traversing section that traverses the yarn wound around the package;
A traverse drive unit that drives the traverse unit independently of the package drive unit;
A yarn winding device comprising:

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