CN111601764B

CN111601764B - Yarn winding machine and yarn winding method

Info

Publication number: CN111601764B
Application number: CN201880086751.6A
Authority: CN
Inventors: 牟田胜文
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 2018-01-31
Filing date: 2018-12-27
Publication date: 2022-06-03
Anticipated expiration: 2038-12-27
Also published as: JP2019131375A; WO2019150869A1; CN111601764A

Abstract

The invention provides a yarn winding machine and a yarn winding method. An automatic winder (yarn winding machine) includes a traverse section, an input section, a correction thread producing section, and a traverse control section. The traverse section traverses the yarn wound in the package. The input unit receives an input of only one specified point indicating a correspondence relationship between a correction width of a correction target traverse width and a value that increases with the winding of the yarn, that is, a winding progress value that is in a range that is larger than a winding start time and smaller than a full winding time. The correction line creation unit creates a correction line that is a line indicating a correspondence relationship between the correction width and the winding progress value at only one designated point input to the input unit, and at least a part of which is a curve. The traverse control section controls the traverse section so as to traverse the yarn by a value obtained by correcting the target traverse width by the correction width indicated by the correction line created by the correction line creation section.

Description

Yarn winding machine and yarn winding method

Technical Field

The present invention relates to a yarn winding machine that winds a yarn while traversing the yarn to form a package.

Background

Conventionally, when a yarn is wound while traversing and winding the yarn to form a package, a phenomenon (a bulge coil) in which an end face of the package bulges outward in the axial direction is known. This is caused by the fact that the yarn of the intermediate layer of the package is pressed by the fastening force of the yarn on the outer diameter side and the reaction force from the winding tube, and protrudes outward in the axial direction from the package end surface. Patent documents 1 and 2 disclose a yarn winding machine that performs control for preventing the convex edge from being wound.

In the yarn winding machine of patent document 1, the traverse width correction width (end correction width) can be set in association with the package diameter. The yarn winding machine controls the traverse device based on the set correspondence relationship, thereby preventing the generation of the convex edge roll. In the yarn winding machine of patent document 2, when a conical package is wound, the ratio of the traverse speed in the small diameter side region to the traverse speed in the large diameter side region of the package is changed. This changes the balance of the winding density between the small diameter side region and the large diameter side region, and therefore, the occurrence of the convex edge roll can be reduced. Patent document 2 describes a technique of changing the end correction width in accordance with the yarn layer, as in patent document 1, in order to more reliably prevent the occurrence of the bulge.

Patent document 1: japanese patent laid-open publication No. 2011-143977

Patent document 2: japanese patent laid-open publication No. 2015-178403

Patent document 3: german patent application publication No. 102005045790

In patent documents 1 and 2, several points are set in association with the end correction width and the package diameter, and the traverse width is corrected along a folding line connecting these points. Therefore, since the slope of the correction width changes rapidly, the traverse width cannot be changed so as to match the shape of the raised-edge roll. As a result, the end face of the package may have a stepped shape, and the quality of the package may be degraded. Further, the more points are set, the less conspicuous the step shape becomes, and the configuration is such that the desired convex edge correction can be achieved. Patent document 3 describes a method of correcting the end face of the package along the curve of the arc, and describes a method of calculating a curve for determining the arc, but does not describe any method of setting and inputting the curve of the arc by the operator.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and a main object thereof is to provide a yarn winding machine capable of suppressing the occurrence of a bulge coil, improving the setting operation efficiency, and suppressing the end surface of the package from having a stepped shape.

As described above, means for solving the problems and effects thereof will be described below.

According to a first aspect of the present invention, there is provided a yarn winding machine configured as follows. That is, the yarn winding machine includes a traverse section, an input section, a correction-yarn creating section, and a traverse control section. The traverse section traverses the yarn wound in the package. The input unit receives an input of only one specified point in a correspondence relationship between a correction width indicating a correction target traverse width and a value that increases with the winding of the yarn, that is, a winding progress value that is greater than a range in which the winding start time is less than a full winding time. The correction line creating unit creates a correction line which is a line indicating a correspondence relationship between the correction width and the winding progress value at only one of the designated points input to the input unit and at least a part of which is a curve. The traverse control section controls the traverse section so as to traverse the yarn by using the value obtained by correcting the target traverse width by the correction width indicated by the correction line produced by the correction line producing section.

Accordingly, since the corresponding relationship between the correction width and the winding-in-progress value includes the curve, the slope of the correction width changes gradually at least in the region including the curve. Therefore, the end face of the package hardly has a stepped shape, and the quality of the package can be improved. Further, since only one designated point is input and a correction line in which the slope of the correction width changes gradually is created, the setting operation efficiency can be improved without degrading the quality of the package.

In the yarn winding machine, it is preferable that the correction thread creating section creates the correction thread in which at least a portion from a winding start time to the predetermined point is a curved line.

Accordingly, the correction line becomes a curve immediately after the start of winding in which the variation of the correction width tends to increase, and therefore, the end face of the package can be more reliably prevented from becoming a stepped shape.

In the yarn winding machine, it is preferable that the correction thread creating section creates the correction thread having a curved line as a whole.

This can suppress the end face from forming a stepped shape in the entire package.

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

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

In the yarn winding machine, it is preferable that the correction line creating section increases the slope of the correction line from the start of winding to the predetermined point in a manner different from an increase in the slope of the correction line from the full winding to the predetermined point.

In this way, the slope is appropriately changed in the two sections, and an ideal shape in which the end face of the package does not bulge can be obtained.

In the yarn winding machine, it is preferable that the correction line creating section creates the correction line smoothly without changing an inclination at the predetermined point.

Thus, unlike patent document 1, since the change in the correction width before and after the specified point becomes smooth, the end face of the package can be more reliably prevented from forming a stepped shape.

In the yarn winding machine, it is preferable that the correction thread making section makes the correction thread including a curve of an arc or an elliptic arc.

This makes it possible to include a simple curve in the correction line.

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

Thereby, various curves can be realized.

According to a second aspect of the present invention, the following yarn winding method is provided. That is, in the yarn winding method, the yarn is wound while traversing, and a package is formed. The yarn winding method includes a designated point receiving step, a correction thread producing step, and a winding step. In the specified point receiving step, input of only one specified point is received, the input indicating a correction width of the correction target traverse width and a correspondence relationship between a value that increases with the winding of the yarn, that is, a winding progress value that is greater than a range in which the winding start time is less than a full winding time. In the correction line producing step, a correction line is produced which passes through only one of the designated points received in the designated point receiving step, is a line showing a correspondence relationship between the correction width and the winding progress value, and at least a part of the correction line is a curve. In the winding step, the traverse section is controlled to wind the yarn so that the yarn is traversed by a value indicating that the correction width indicated by the correction line produced in the correction line production step has corrected the target traverse width.

Accordingly, since the curve is included in the correspondence relationship between the correction width and the winding-in-progress value, the correction width gradually changes in a region including at least the curve. Therefore, the end face of the package hardly has a stepped shape, and the quality of the package can be improved. Further, since only one designated point is input and a correction line in which the slope of the correction width changes gradually is created, the setting operation efficiency can be improved without degrading the quality of the package.

Drawings

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 yarn winding unit.

Fig. 3 is a cross-sectional view schematically showing a cross-sectional shape of the package according to the present embodiment and a conventional convex edge roll countermeasure when the convex edge roll is generated.

Fig. 4 is a diagram illustrating a target traverse width and a correction width.

Fig. 5 is a flowchart showing a process of winding the yarn while suppressing the occurrence of the convex roll.

Fig. 6 is a diagram showing a screen on which a value relating to correction of the raised edge roll is input and a screen on which a correction line is displayed.

Fig. 7(a) to (c) are views showing correction lines produced by the yarn winding machine of the modification.

Detailed Description

Next, embodiments of the present invention will be described with reference to the drawings. In the present specification, "upstream" and "downstream" refer to upstream and downstream in the running direction of the yarn at the time of winding the yarn.

As shown in fig. 1, an automatic winder (yarn winding machine) 1 includes: a plurality of yarn winding units 10 arranged in a row, a doffing device 60, and a machine control device 90.

Each yarn winding unit 10 traverses the yarn 20 unwound from the yarn feeding bobbin 21, and winds the yarn around a conical winding tube 22 supported by a cradle (winding tube support portion) 23 to form a conical package 30. Further, the cradle 23 has: a small-diameter side support portion for rotatably supporting the small-diameter side end of the winding tube 22, and a large-diameter side support portion for rotatably supporting the large-diameter side end of the winding tube 22. The yarn winding unit 10 may be configured to wind the yarn 20 around a cylindrical winding tube 22 to form a package 30 having a bobbin shape.

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

The machine control device 90 includes a machine input unit 91 and a machine display unit 92. The machine input unit 91 can perform setting for each yarn winding unit 10 by inputting a predetermined set value or selecting an appropriate control method by an operator. The machine table display unit 92 can display an input screen of a set value, the winding state of the yarn 20 in each yarn winding unit 10, the contents of a failure occurring, and the like.

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

The unit control unit 51 includes an arithmetic device such as a CPU, a RAM, a ROM, an I/O port, and a communication port. The ROM stores a program for controlling each part of the winding unit main body 17. The unit control section 51 functions as a correction thread creation section 52 and a traverse control section 53 by the CPU executing a predetermined program (these processes will be described in detail later). The I/O port and the communication port are connected to each part of the winding unit main body 17 and the machine control device 90, and communication of control information and the like is possible. Thereby, the unit control section 51 can control the operation of each section provided in the winding unit main body 17.

In the winding unit main body 17, in a yarn running path between the yarn feeding bobbin 21 and the contact roller 29, a yarn unwinding assisting device 12, a tension applying device 13, a piecing device 14, a yarn length detecting sensor 15, a yarn clearer 16, and a winding unit 18 are arranged in order from the yarn feeding bobbin 21 side.

The yarn unwinding assisting device 12 lowers the regulating member 40 covering the core tube of the yarn feeding bobbin 21 in conjunction with the unwinding of the yarn 20 from the yarn feeding bobbin 21, thereby assisting the unwinding of the yarn 20 from the yarn feeding bobbin 21. The regulating member 40 contacts a balloon formed on the upper portion of the yarn feeding bobbin 21 by the rotation and centrifugal force of the yarn 20 unwound from the yarn feeding bobbin 21, and controls the balloon to an appropriate size, thereby assisting the unwinding of the yarn 20. A sensor, not shown, for detecting the upper portion of the yarn layer of the yarn feeding bobbin 21 is provided near the regulating member 40. When the sensor detects the lowering of the upper portion of the yarn layer, the regulating member 40 is lowered accordingly.

The tension applying device 13 applies a predetermined tension to the running yarn 20. As the tension applying device 13, for example, a gate type in which movable comb teeth are arranged with respect to fixed comb teeth can be used. The movable comb teeth can be rotated by a rotary solenoid so that the comb teeth are engaged with each other or disengaged from each other. The tension applying device 13 may be a disk type, for example, in addition to the door type.

The yarn splicing device 14 splices the lower yarn on the yarn supply bobbin 21 side and the upper yarn on the package 30 side when the yarn clearer 16 detects a yarn defect and performs yarn cutting, or when a yarn breakage occurs during unwinding from the yarn supply bobbin 21. The joint device 14 may be of a mechanical type or a structure using a fluid such as compressed air.

The yarn length detection sensor 15 detects the yarn length of the yarn 20 wound in the package 30 in a non-contact manner. The yarn length detection sensor 15 detects the amount of hairiness of the yarn 20, calculates the amount of movement of the yarn 20, and detects the yarn length. Specifically, the yarn length detection sensor 15 is provided with a plurality of optical hairiness detection portions each including a light receiving element and a light source along the yarn traveling direction. The yarn length detection sensor 15 detects the running length of the yarn 20 based on changes in the output signals of the plural hairiness detection portions located at different positions in the yarn running direction.

The unit control unit 51 can determine the thickness of the yarn layer of the package 30 using the running length of the yarn 20 detected by the yarn length detection sensor 15. Specifically, the unit control section 51 can calculate the winding angle from the yarn running speed calculated based on the yarn running length detected by the yarn length detection sensor 15 and the traverse speed. The unit control section 51 calculates the package diameter based on the winding angle, the peripheral speed of the package 30, and the rotational speed of the package 30. The unit control section 51 can calculate the thickness of the yarn layer by subtracting the diameter of the winding tube 22 from the package diameter.

The yarn clearer 16 includes: a yarn clearer 49 provided with an unillustrated sensor for detecting the thickness of the yarn 20 and an analyzer 55 for processing a yarn thickness signal from the sensor are arranged. The yarn clearer 16 monitors a yarn thickness signal from the sensor to detect a yarn defect such as a slub. A cutter, not shown, is provided near the clearer head 49 to cut the yarn 20 immediately when the clearer 16 detects a yarn defect.

A lower yarn catching member 25 that catches the yarn end of the lower yarn on the yarn feeding bobbin 21 side and guides the yarn end to the yarn splicing device 14, and an upper yarn catching member (guide member) 26 that catches the yarn end of the upper yarn on the package 30 side and guides the yarn end to the yarn splicing device 14 are provided on the lower side and the upper side of the yarn splicing device 14, respectively. The lower yarn catching member 25 includes a lower yarn guide arm 33 and a lower yarn suction port 32 formed at the tip of the lower yarn guide arm 33. The upper yarn catching member 26 includes an upper yarn guide arm 36 and an upper yarn suction port 35 formed at the tip of the upper yarn guide arm 36.

The lower bobbin arm 33 and the upper bobbin arm 36 are rotatable about a shaft 34 and a shaft 37, respectively. The lower yarn bobbin arm 33 and the upper yarn bobbin arm 36 are connected to appropriate negative pressure sources (not shown). Thereby, suction flows are generated in the lower yarn suction port 32 and the upper yarn suction port 35, and yarn ends of the upper yarn and the lower yarn can be sucked and caught by the lower yarn bobbin arm 33 and the upper yarn bobbin arm 36, respectively.

The winding unit 18 includes: a cradle 23 for detachably supporting the winding tube 22, a contact roller 29 which is in contact with the outer peripheral surface of the winding tube 22 or the outer peripheral surface of the package 30 and is rotatable, a traverse arm (traverse section) 71, and a traverse drive motor 72.

The cradle 23 can rotate about the rotation shaft 48. The yarn layer increases as the yarn 20 is wound around the winding tube 22, and the cradle 23 rotates accordingly. This can eliminate the influence of the shape change accompanying the increase of the yarn layer.

A package driving motor 41 is attached to the cradle 23. The winding tube 22 is rotationally driven by the package driving motor 41, and the yarn 20 is wound around the winding tube 22. The motor shaft of the package driving motor 41 is connected to the winding tube 22 so as not to be relatively rotatable when the winding tube 22 is supported by the cradle 23 (so-called direct drive method). The operation of the package drive motor 41 is controlled by the package drive control section 42. The package drive control unit 42 receives an instruction from the unit control unit 51 to adjust the rotation speed (or the acceleration) of the package drive motor 41.

The traverse arm 71 engages with the yarn 20 to traverse the yarn 20. The traverse arm 71 is driven by a traverse drive motor 72. Specifically, the traverse arm 71 is provided to continuously reciprocate in the package width direction (the axial direction of the winding tube 22 and the package 30) in conjunction with the normal and reverse rotation of the rotor of the traverse driving motor 72. The operation of the traverse drive motor 72 is controlled by the unit control section 51 via the traverse drive control section 73. A hook-shaped yarn guide section is formed at the tip end of the traverse arm 71, for example. The traverse arm 71 performs reciprocating rotational motion while holding the yarn 20 by the yarn guide section, thereby enabling the yarn 20 to traverse. Further, a guide plate 28 is provided slightly upstream of the traverse position. The guide plate 28 guides the yarn 20 on the upstream side to the traverse portion. With the above configuration, the yarn 20 unwound from the yarn supplying bobbin 21 can be wound to form the package 30.

Next, a process performed by the automatic winder 1 to prevent the generation of the convex edge roll will be described. First, the generation of the raised edge roll and the conventional measures against the generation of the raised edge roll will be described with reference to fig. 3 and 4. Fig. 3 is a cross-sectional view schematically showing the cross-sectional shape of the package 30 of the present embodiment, when the bulge coil is generated, when the conventional bulge coil countermeasure is taken. Fig. 4 is a diagram illustrating a target traverse width and a correction width. In the following description, the axial direction of the package 30 (the winding tube 22) is referred to as the package width direction.

The bulge roll is a phenomenon in which the side surface of the package bulges out as shown by the chain line in fig. 3. This is because the yarn 20 of the middle layer of the package is pressed by the fastening force of the yarn 20 on the inner diameter side and the yarn 20 on the outer diameter side of the package, and protrudes from the package end face. The length of the protrusion depends on the distance from the surface of the take-up tube 22 (i.e. the thickness of the yarn layer).

As shown in fig. 4, the traverse arm 71 is set to traverse with a target traverse width determined by conditions other than the flanged roll. Therefore, the target traverse width is reduced based on the protruding length of the convex-side roll, and the occurrence of the convex-side roll can be reduced. Hereinafter, the length smaller than the target traverse width is referred to as a correction width. Since the convex windings are generated on both end surfaces of the package 30, the correction width is preferably set also at both end portions of the target traverse width.

However, conventionally, when the corresponding relationship between the package diameter and the correction width is shown in the graph, correction is performed so as to form a broken line. On the other hand, the bead roll is curved as shown by the chain line in fig. 3. Therefore, when the conventional measure is applied to the raised edge roll, the end surface of the package 30 has a stepped shape as shown by a broken line in fig. 3, and the quality of the package 30 may be degraded.

In contrast, when the method of the present embodiment is used to take measures against the crowned coil, the package 30 in which the generation of the crowned coil and the step shape of the end surface are suppressed can be formed as shown by the solid line in fig. 3. The following description refers to fig. 5 and 6. Fig. 5 is a flowchart showing a process of winding the yarn while suppressing the occurrence of a convex roll. Fig. 6 is a diagram showing a screen on which values relating to correction of the raised edge roll are input and a screen on which correction lines are displayed.

Before the winding of the yarn 20, the operator performs a predetermined operation on the machine input section 91, and displays an input screen for inputting a value related to correction on the large diameter side for suppressing the occurrence of the bulge coil. This input screen is shown on the lower side of fig. 6. A frame for inputting a yarn layer and a correction width corresponding thereto for one designated point and a frame for inputting a yarn layer at an end point are displayed on an input screen.

The designated point is a point at which the operator designates the correspondence between the yarn layer and the corrected width. In the present specification, the start point of the correspondence relationship at the start of winding (when the yarn layer is 0) and the end point of the correspondence relationship at the end (when the required amount of the yarn 20 is wound in full) are not included in the designated points. In the present embodiment, the input of one designated point is accepted. Here, the specified point specified by the operator corresponds to the peak value of the convex-edge roll (when the protrusion length of the yarn 20 is the longest in the case where the convex-edge roll measure is not taken). Thus, a value less than half of the yarn layer at full package is generally entered.

In the present embodiment, since the yarn layer is considered to be 0 at the start of winding and the correction width is 0, the operator is not required to specify the start point. Instead of this processing, processing may be performed that can specify a value other than 0 as the correction width at the start of winding. In the present embodiment, since the correction width at the end is considered to be 0, the operator is required to specify only the yarn layer at the end point. However, a value other than 0 may be specified as the correction width at the end. The yarn layer at the end may be automatically (without input from the operator) applied based on the previously input set value of the package 30 (the diameter of the winding tube, the package diameter at the end, and the like).

In the present embodiment, the operator determines the yarn layer and the correction width of the designated point based on the shape of the raw yarn roll, experience, and the like during winding in advance, and operates the machine base input unit 91 to input the yarn layer and the correction width. The yarn layer at the end is calculated based on the specification of the package 30 to be formed, and the input is made by operating the table input section 91. The automatic winder 1 receives the value input as described above (S101, designated point receiving step). When different types of packages 30 are formed by the plurality of yarn winding units 10 included in the automatic winder 1, the operator inputs a predetermined point or the like for each type of package 30. The same processing is also performed on the small diameter side. That is, in the present embodiment, the small diameter side and the large diameter side (the first end and the second end in the package width direction) are each configured to receive an input of one designated point and create one correction line.

In the present embodiment, a specific value is input using the base input unit 91 and a specified point is input, but instead, a method of specifying a point on a coordinate space as shown in fig. 6 by a mouse pointer, a touch panel, or the like may be used.

Based on the value input by the operator, the correction line creating unit 52 of the cell control unit 51 creates a correction line that interpolates the start point, the designated point, and the end point (S102, correction line creating step). The correction line creating unit 52 creates a correction line including at least a part of a curve. In the present embodiment, the correction line creating unit 52 creates correction lines that are all curved (from the winding start time to the full winding time). As shown in fig. 6, the length of the yarn layer is different between the starting point side and the ending point side of the predetermined point, and the yarn layer is a curved line having different shapes. Hereinafter, a correction line closer to the starting point than the specified point is referred to as a first curved line portion, and a correction line closer to the ending point than the specified point is referred to as a second curved line portion.

In the present embodiment, the first curved portion is an elliptical arc having a center angle of 90 °. Therefore, when the horizontal axis (axis indicating the length of the yarn layer) is 0 ° and the counterclockwise rotation is positive, the slope of the starting point of the first curved portion is about 90 °, and the slope of the predetermined point is 0 °. In addition, the first curve portion has a large change in slope in the vicinity of the starting point, and has almost no change in slope in the vicinity of the specified point (in other words, the change amount of the slope in the first half is larger than the change amount of the slope in the second half). The first curved portion is a curve that protrudes in a direction (upward direction in fig. 6) in which the correction width increases.

Instead of the first curved portion of the present embodiment described above, the first curved portion may be an arc having a center angle of 90 °. Further, the center angle may be other than 90 ° or may be an arc or an elliptical arc. The slope of the starting point may be smaller than 90 °, and the slope of the predetermined point may be larger than 0 ° (in other words, a part of an arc or an elliptic arc having a center angle of 90 ° may be defined as the first curved line portion). As shown in fig. 7(c), the first curved portion may be a curve other than a circular arc. The first curved portion may partially include a straight line.

In the present embodiment, the second curve portion is a curve in which the ratio of the arc created by applying the predetermined function to the specified point is changed so as to pass through the specified point and the end point. Thus, the second curved portion is a different curve than the first curved portion. The ratios are not uniform, but differ depending on the yarn layer. In addition, the slope of the designated point of the second curve portion is approximately 90 °, and the slope of the end point is greater than 90 ° and less than 135 °. Therefore, the first curved portion and the second curved portion have the same slope at the predetermined point, and are therefore connected smoothly. The change amount (90 °) of the slope of the first curve portion is larger than the change amount (less than 90 °) of the slope of the second curve portion. In the second curve portion, the slope changes slowly in the vicinity of the specified point, and the slope changes largely in the vicinity of the end point (in other words, the change amount of the slope in the first half is smaller than the change amount of the slope in the second half). The manner of increasing the first curve portion (how the correction width increases, specifically, the first order differential value or the second order differential value of the correction width) is different from the manner of decreasing the second curve portion. That is, the manner of increase from the start point to the specified point is different from the manner of increase from the end point to the specified point. The second curved portion is a curve that is convex in a direction in which the correction width increases (upward direction in fig. 6).

Instead of the second curved portion of the present embodiment, as shown in fig. 7(a), the second curved portion may be an arc or an elliptical arc having a center angle of 90 °. Further, the central angle may be an arc or an elliptical arc other than 90 °. The slope of the specified point may be less than 0 °, and the slope of the end point may be 90 °. The second curved portion may partially include a straight line. Instead of the second straight portion, as shown in fig. 7(b), a second straight portion that is straight as a whole may be derived. The second straight line portion in fig. 7(b) is a straight line having a constant correction width from the specified point to the end point. The second straight portion may be configured to connect the designated point and the end point with a single straight line.

Although the first curve part and the second curve part are shownVarious methods are available for deriving the function of the line portion, but the following methods are exemplified. In the case where these curved portions are based on an elliptical arc or the shape of an elliptical arc, these curved portions can use the formula (x) of an ellipse²/a²+y²/b²1) is derived. When these curved portions are trigonometric functions or shapes based on the functions (for example, sin functions or cos functions in which the declination is changed within a predetermined range), they are described using trigonometric functions. Further, the curve portions may be derived by calculating coefficients based on the specified points and substituting the coefficients into an nth-order polynomial.

The correction line creating unit 52 of the present embodiment can create a correction line from only one set designated point. In addition to this function, the corrected line creating unit 52 may have a function of creating corrected lines based on a plurality of (e.g., 2) designated points, as shown in fig. 7 c. In this case, the operator inputs the yarn layers of two specified points and the correction width. Then, a correction line is created which partially forms a curve by the start point, the two designated points, and the end point. The shape of the specific correction line and the derivation method are performed by combining the above-described processes, for example.

As shown in fig. 6, the correction line creating unit 52 graphically depicts the created correction lines and displays them on the stage 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. This allows the operator to intuitively grasp what correction line is created based on the designated point. The correction line may 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 cell control unit 51. However, in order to graphically draw the created correction lines and display them on the machine display unit 92 as described above, the machine control device 90 that controls the machine display unit 92 needs the same correction line creation unit. Therefore, in the present embodiment, the stage control device 90 is also provided with a control mechanism corresponding to the correction line creating unit 52.

In addition, the display of the correction lines in the form of a chart may be omitted. In this case, the correction line creating unit 52 can omit creation of a line graph for displaying the correction lines in a graph form, but need to create a function for determining the correction width, and the like. Since this function is the correction line itself, the correction line creating unit 52 creates the correction line even when the display of the correction line in the graph format is omitted, and therefore, the function is included in the scope of the present invention.

Next, the operator starts winding the yarn 20 by appropriately operating the machine input section 91 of the machine control device 90 or the like (S103). During the winding of the yarn 20, the thickness of the yarn layer is calculated by the unit control section 51 as described above (S104). The traverse control section 53 obtains a correction width corresponding to the calculated yarn layer based on the correction line created in step S102, and controls the traverse arm 71 using a value obtained by correcting the target traverse width by the correction width (S105, winding step).

In the present embodiment, since the correspondence relationship between the correction width and the yarn layer includes a curve, the slope of the correction width changes gradually in a region including at least the curve. Therefore, the generation of the convex edge roll can be prevented, and the end face of the package 30 can be suppressed from being formed into a stepped shape.

The unit control unit 51 detects whether the package 30 is fully wound (S106), and performs the above control (S104 and S105) until the package is fully wound. When the package 30 is full, the winding is completed (S107).

As described above, the automatic winder 1 according to the above embodiment includes the traverse arm 71, the machine base input section 91, the correction thread making section 52, and the traverse control section 53, and winds the yarn 20 by the following yarn winding method. The traverse arm 71 traverses the yarn 20 wound in the package 30. The machine base input section 91 receives an input of only one predetermined point in the correspondence relationship between the correction width indicating the correction target traverse width and the yarn layer that increases as the yarn 20 is wound and is in the range larger than the range when the winding is started and smaller than the full winding. The corrected line creating section 52 creates a corrected line which indicates a correspondence relationship between the corrected width and the yarn layer at one designated point inputted to the machine table input section 91 and at least a part of which is curved. The traverse control section 53 controls the traverse arm 71 to traverse the yarn 20 by using the value obtained by correcting the target traverse width by the correction width indicated by the correction line created by the correction line creation section 52. The yarn layer or package diameter at the time of full winding is set by another setting item similar to the conventional one.

Accordingly, since the correspondence relationship between the correction width and the yarn layer includes a curve, the slope of the correction width changes gradually in a region including at least the curve. Therefore, the end surface of the package 30 is hardly formed into a stepped shape, and the quality of the package 30 can be improved. Further, since the correction line in which the slope of the correction width changes gradually is created by inputting only one specified point, the setting operation efficiency can be improved without degrading the quality of the package 30.

In the automatic winder 1 according to the above embodiment, the corrected thread creating unit 52 creates a corrected thread in which at least a portion from the winding start time to a predetermined point is a curve.

Accordingly, the correction line is curved immediately after the start of winding in which the variation of the correction width tends to increase, and therefore the end face of the package 30 can be more reliably prevented from forming a stepped shape.

In the automatic winder 1 according to the above embodiment, the corrected thread creating unit 52 creates a corrected thread which is a curve as a whole.

This can suppress the end face from having a stepped shape in the entire package 30.

The automatic winder 1 according to the above embodiment includes a stage display unit 92 that displays the correction threads created by the correction thread creating unit 52 in a graph format.

In the automatic winder 1 according to the above embodiment, the table input unit 91 receives only one designated point in a yarn layer larger than the range of the winding start time and smaller than the full winding time. The correction line creating unit 52 creates a correction line based on only one designated point.

This can reduce the trouble of inputting the set point, and can suppress the end face of the package 30 from having a stepped shape.

In the automatic winder 1 according to the above embodiment, the correction thread creating unit 52 differs from the case where the inclination of the correction thread from the start of winding to the predetermined point is increased from the full winding to the predetermined point.

Thus, the slope is changed in an appropriate manner in the two sections, and the end face of the package 30 is formed into an ideal shape without bulging.

In the automatic winder 1 according to the above embodiment, the corrected line creating unit 52 creates a corrected line that is smooth without a change in slope at a predetermined point.

Thus, unlike patent document 1, since the change in the correction width before and after the specified point becomes smooth, the end face of the package 30 can be more reliably prevented from having a stepped shape.

In the automatic winder 1 according to the above embodiment, the corrected thread creating unit 52 creates a corrected thread including a curved line of a circular arc or an elliptical arc.

This makes it possible to include a simple curve in the correction line.

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

Thereby, various curves can be realized.

While the preferred embodiments of the present invention have been described above, the above configuration can be changed as follows, for example.

In the above embodiment, the cell 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. Alternatively, the machine table control device 90 or another control device (for example, a control device dedicated to traverse) may perform at least one of the two processes.

In the above embodiment, the machine control device 90 performs both the processing of receiving the input of the designated point and the processing of displaying the correction line in the form of a graph. Alternatively, the unit control section 51 or another control device (e.g., a traverse-dedicated control device) may perform at least one of the two processes.

As a configuration for determining the thickness of the yarn layer of the package 30, an angle sensor for detecting the angle of the cradle 23 (the rotation angle about the rotation axis 48) may be used. The angle sensor is constituted by, 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 becomes thicker, the package diameter can be detected by detecting the angle by the angle sensor. Then, the thickness of the yarn layer of the package 30 can be calculated by subtracting the diameter of the winding tube 22 from the package diameter. In addition to the angle sensor, a method using an analog sensor or an absolute sensor may be used as a method of detecting the yarn layer.

As a structure for determining the yarn layer of the package 30, a timer capable of measuring an elapsed time can be used. In this case, the temporal change in the thickness of the yarn layer is calculated based on the winding conditions and is determined in advance by an empirical value. Then, the thickness of the yarn layer is determined based on the determined value and the measured elapsed time. In addition, the timer can measure the elapsed time in consideration of the time during which the winding is interrupted by the cut yarn or the broken yarn.

In the above embodiment, the correction width is changed according to the thickness of the yarn layer, but a value other than the thickness of the yarn layer can be used as long as the traverse speed ratio is changed according to the winding progress value, which is a value that increases with winding. For example, instead of the thickness of the yarn layer, the package diameter, the length (yarn length) of the wound yarn 20, the winding time, or the like may be used. In this case, the specified point input by the operator is also the package diameter, the yarn length, or the winding time, instead of the yarn layer.

Instead of directly rotating the package 30 by the package driving motor 41, the package 30 may be driven to rotate by the rotation of the contact roller 29.

Instead of the arm type traverse arm 71 of the above embodiment, for example, a belt type traverse guide may be used.

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

Description of reference numerals

1 … automatic winder (yarn winding machine)

10 … yarn winding unit

30 … roll

51 … unit control part

52 … correction line forming part

53 … traverse control section

71 … Traverse arm (Traverse part)

91 … machine input unit (input unit).

Claims

1. A yarn winding machine is characterized by comprising:

a traverse section that traverses the yarn wound in the package;

an input unit that receives an input of only one specified point in a correspondence relationship between a correction width indicating a correction target traverse width and a winding progress value that is a value that increases with the winding of the yarn, that is, a value that is greater than a range in which the winding is started and less than a full winding, the correction width being performed by an operator;

a correction line creation unit that creates a correction line that is a line indicating a correspondence relationship between the correction width and the winding progress value at only one of the designated points input to the input unit and at least a part of which is a curve; and

a traverse control section for controlling the traverse section so as to traverse the yarn by a value obtained by correcting a target traverse width by the correction width indicated by the correction line produced by the correction line producing section,

the correction line creating section creates the correction line in which at least a portion from a winding start time to the designated point is a curve,

the correction line producing section produces the correction line which is a curve as a whole.

2. The yarn winding machine according to claim 1, comprising:

and a display unit that displays the correction lines created by the correction line creation unit in a graph format.

3. The yarn winding machine of claim 1,

in the correction line creating unit, a slope of the correction line from a winding start time to the predetermined point is increased in a different manner from a slope of the correction line from a full winding time to the predetermined point.

4. The yarn winding machine of claim 2,

5. The yarn winding machine according to any one of claims 1 to 4,

the correction line creating unit creates the correction line that is smoothed without change in slope at the specified point.

6. The yarn winding machine according to any one of claims 1 to 4,

the correction line creating unit creates the correction line including a curve of an arc or an elliptic arc.

7. Yarn winding machine according to claim 5,

8. The yarn winding machine according to any one of claims 1 to 4 and 7,

the curve of the correction line is described as a trigonometric function.

9. Yarn winding machine according to claim 5,

the curve of the correction line is described as a trigonometric function.

10. The yarn winding machine of claim 6,

the curve of the correction line is described by a trigonometric function.

11. A yarn winding method for winding a yarn while traversing the yarn to form a package, comprising:

a designated point receiving step of receiving an input of only one designated point in a correspondence relationship between a correction width indicating a correction target traverse width and a value that increases with the winding of the yarn, that is, a winding progress value that is greater than a range in which the winding is started and less than a full winding, the correction width being input by an operator;

a correction line creating step of creating a correction line which passes through only one of the designated points received in the designated point receiving step, is a line indicating a correspondence relationship between the correction width and the winding-up progress value, and at least a part of which is a curve; and

a winding step of winding the yarn so as to traverse the yarn by a value obtained by correcting a target traverse width by the correction width indicated by the correction line produced in the correction line producing step,