JP2016128353A - Yarn winding machine, package and production method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress ear height of a package, and suppress formation of a rough part on a front layer side of the package.SOLUTION: A winder unit 10 comprises: a package driving motor 41 for rotating and driving a package 30; a traverse device 70 for traversing a yarn 20 to be wound around the package 30; and a creeping control part 78x and a creeping ratio switch part 50x for controlling the traverse device 70 for performing creeping. The winder unit 10 forms a first yarn layer by performing creeping at a normal creeping ratio, and winding the yarn 20 around the package 30, then, forms a second yarn layer by performing creeping at a winding finish creeping ratio which is lower than the normal creeping ratio and winding the yarn 20 around the package 30.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a yarn winding machine, a package, and a method for manufacturing the package.

  As a conventional yarn winding machine, for example, as described in Patent Document 1, a yarn winding machine including a package driving unit that rotationally drives a package and a traverse device that traverses a yarn wound around the package is known. ing. In the yarn winding machine described in Patent Document 1, creeping is prohibited at the beginning of winding of the package, and creeping is started when the current diameter of the package becomes equal to or larger than the set diameter.

JP 2007-230708 A

  In the yarn winding machine, for example, creeping may be performed to suppress the ear height of the package. However, due to the creeping, a dense part is formed on the surface layer side of the package, and the appearance and the touch (hand feeling) may be impaired.

  An object of the present invention is to provide a yarn winding machine, a package, and a method for manufacturing the package, which can suppress the formation of a dense portion on the surface layer side of the package while suppressing the height of the package.

  A yarn winding machine according to the present invention includes a package driving unit that rotationally drives a package, a traverse device that traverses the yarn wound around the package, and a control unit that performs creeping by controlling the traverse device. The yarn is wound around the package while creeping at a creeping rate to form the first yarn layer, and then wound around the package while creeping at a second creeping rate lower than the first creeping rate. To form a second yarn layer.

  According to this yarn winding machine, it is possible to suppress the formation of a dense portion by reducing the creeping rate on the surface layer side of the package while performing creeping to suppress the height of the package ear. It becomes. The creeping rate is a value obtained by dividing the creeping amount (change amount of the traverse width in creeping) by the traverse width before the change.

  The yarn winding machine according to the present invention may further include a creeping rate setting unit that sets the second creeping rate. Thereby, for example, when forming the second yarn layer, the yarn can be wound by creeping at a desired second creeping rate.

  A yarn winding machine according to the present invention includes a package driving unit that rotationally drives a package, a traverse device that traverses the yarn wound around the package, and a traverse device that controls the traverse width and pulsates the traverse width as the yarn is wound. And a control unit that periodically changes the traverse width to be narrowed to a first change rate after winding the yarn around the package while periodically changing the traverse width at a first change rate to form the first yarn layer. The second yarn layer is formed by winding the yarn around the package while periodically changing the traverse width at a second change rate lower than the rate.

  According to this yarn winding machine, while changing the traverse width and suppressing the ear height of the package, it is possible to reduce the change rate on the surface layer side of the package and suppress the formation of a dense portion. It becomes. The change rate is the amount of change in the traverse width per unit time in the change in traverse width.

  The yarn winding machine according to the present invention may further include a timing setting unit that sets a timing for starting the formation of the second yarn layer. According to this configuration, for example, the amount of forming the second yarn layer can be adjusted as desired.

  In the yarn winding machine according to the present invention, the timing setting unit, as the timing, when the package yarn layer thickness is 90% or more and less than 100% of the target yarn layer thickness, the package diameter is 90% or more of the target package diameter. You may set the time of less than 100%, or the time when the winding length of the yarn wound by the package is 90% or more and less than 100% of the target winding length. According to this configuration, in the package, from the time when the target yarn layer thickness is 90% or more and less than 100%, from the time when the target package diameter is 90% or more and less than 100%, or the winding length is the target winding length. The second yarn layer is formed from 90% or more and less than 100%.

  The package according to the present invention is provided on the first yarn layer formed by winding the yarn while creeping at the first creeping rate, and is lower than the first creeping rate. A second yarn layer formed by winding the yarn while creeping at a second creeping rate.

  According to this package, similar to the above-described effects, while suppressing the ear height of the package by creeping, on the surface layer side of the package, the creeping rate is lowered to suppress the formation of a dense portion. Is possible.

  The package according to the present invention includes a first yarn layer formed by winding a yarn while periodically performing a traverse width change that pulsatically narrows the traverse width as the yarn is wound, at a first change rate; A second yarn layer that is provided on the first yarn layer and is formed by winding the yarn while periodically changing the traverse width at a second change rate lower than the first change rate.

  According to this package, similarly to the above-described effects, while suppressing the ear height of the package by changing the traverse width, on the surface layer side of the package, the rate of change is reduced to prevent the formation of a dense portion. It becomes possible.

  In the package according to the present invention, the outermost layer yarns in the second yarn layer may be arranged at an equal pitch. In this case, it is possible to provide a package with good appearance and touch.

  In the package according to the present invention, the first yarn layer is formed by any one of random winding, step precision winding, and precision winding, and the second yarn layer is formed by any one of step precision winding and precision winding. May be. In this case, it is possible to provide a package with good appearance and touch.

  In the method for manufacturing a package according to the present invention, a package is manufactured by winding a yarn around the package by the yarn winding machine. Also in this package manufacturing method, it is possible to suppress the formation of a coarse / dense portion on the surface layer side of the package while suppressing the height of the package, similarly to the above-described effects.

  According to the present invention, it is possible to suppress the formation of a dense portion on the surface layer side of the package while suppressing the height of the package.

It is a schematic diagram of the automatic winder provided with the winder unit which concerns on one Embodiment. It is the schematic diagram and block diagram which showed the schematic structure of the winder unit. It is a left view which expands and shows the vicinity of the traverse apparatus of a winder unit. It is a figure explaining creeping by a winder unit. It is a chart figure which shows an example of operation | movement of a winder unit. It is a figure explaining the package manufactured by the winder unit.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same or an equivalent part, and the overlapping description is abbreviate | omitted.

  First, an overall configuration of an automatic winder 1 including a winder unit (yarn winding machine) 10 according to the present embodiment will be described with reference to FIG. In the present specification, “upstream” and “downstream” mean upstream and downstream in the traveling direction of the yarn when winding the yarn.

  As shown in FIG. 1, the automatic winder 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 to be able to form a package 30 by winding the yarn 20 unwound from the yarn supplying bobbin 21 while traversing. The traverse means giving a reciprocating motion to the wound yarn. The package 30 is a twill winding package.

  The automatic doffing device 80 travels to the position of the winder unit 10 when the package 30 becomes full in each winder unit 10, discharges the full package 30 from the winder unit 10, and An empty bobbin can be supplied to the unit 10.

  The machine base control device 90 includes a setting unit 91 and a display unit 92. The setting unit 91 can make 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. The display unit 92 may be configured by a touch panel, and the setting unit 91 may be included in the display unit 92.

  Next, the configuration of the winder unit 10 will be specifically described with reference to FIG. As shown in FIG. 2, each winder unit 10 includes a winding unit main body 16 and a unit control unit 50 as main components.

  The unit controller 50 includes, for example, a CPU, a RAM, a ROM, an I / O port, and a communication port. In the ROM, a program for controlling each component of the winding unit main body 16 is recorded. The I / O port and the communication port are connected to each part (details will be described later) included in the winding unit main body 16 and a machine base control device 90 so that control information and the like can be communicated. Thereby, the unit control part 50 can control operation | movement of each part with which the winding unit main body 16 is provided.

  The winding unit main body 16 includes, in order from the yarn feeding bobbin 21 side, the yarn unwinding assist device 12, the tension applying device 13, and the yarn joining device in the yarn traveling path between the yarn feeding bobbin 21 and the contact roller 29. 14 and a yarn monitoring device 15. A yarn supplying section 11 is provided at the lower part of the winding unit main body 16. The yarn supplying section 11 is configured so that the yarn supplying bobbin 21 conveyed by a bobbin conveying system (not shown) can be held at a predetermined position.

  The yarn unwinding assisting device 12 lowers the regulating member 40 covering the core pipe of the yarn supplying bobbin 21 in conjunction with the unwinding of the yarn 20 from the yarn supplying bobbin 21, so that the yarn 20 from the yarn supplying bobbin 21 is lowered. Assist with unraveling. The regulating member 40 contacts the balloon of the yarn 20 formed on 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 of the yarn 20 to an appropriate size. This assists in unwinding the yarn 20. A sensor (not shown) for detecting the chase portion of the yarn feeding bobbin 21 is provided in the vicinity of the regulating member 40. When this sensor detects the descent of the chase portion, the yarn unwinding assisting device 12 follows the descent of the chase portion and lowers the regulating member 40 by, for example, 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 are arranged with respect to fixed comb teeth can be used. The movable comb teeth are rotated by a rotary solenoid so as to be engaged or released with respect to the fixed comb teeth. For the tension applying device 13, for example, a disk-type device can be adopted in addition to the gate-type device.

  The yarn joining device 14 includes a lower yarn from the yarn feeding bobbin 21 and a package at the time of yarn cutting performed by the yarn monitoring device 15 by detecting a yarn defect, or when the yarn breaks during unwinding from the yarn feeding bobbin 21. The upper thread from 30 is spliced. As such a yarn splicing device for splicing the upper yarn and the lower yarn, a mechanical knotter or a splicer using a fluid such as compressed air can be used.

  The yarn monitoring device 15 includes a head 49 in which an unillustrated sensor for detecting the thickness of the yarn 20 is disposed, and an analyzer 52 that processes a yarn thickness signal from the sensor. The yarn monitoring device 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 head 49, a cutter 39 for cutting the yarn 20 immediately when the yarn monitoring device 15 detects a yarn defect is provided.

  A lower yarn catching member 25 that catches the yarn end of the lower yarn and guides it to the yarn joining device 14 is provided below the yarn joining device 14. On the upper side of the yarn joining device 14, an upper yarn catching member 26 that catches the yarn end of the upper yarn and guides it to the yarn joining device 14 is provided. The lower thread catching member 25 includes a lower thread pipe arm 33 and a lower thread suction port 32 formed at the tip of the lower thread pipe arm 33. The upper thread catching member 26 includes an upper thread pipe arm 36 and an upper thread suction port 35 formed at the tip of the upper thread pipe arm 36.

  The lower thread pipe arm 33 and the upper thread pipe arm 36 are configured to be rotatable about a shaft 34 and a shaft 37, respectively. An appropriate negative pressure source is connected to the lower thread pipe arm 33 and the upper thread pipe arm 36, respectively. The lower thread pipe arm 33 is configured to generate a suction flow at the lower thread suction port 32 to suck and capture the thread end of the lower thread. The upper thread pipe arm 36 is configured to generate a suction flow at the upper thread suction port 35 to suck and capture the thread end of the upper thread. The lower thread pipe arm 33 and the upper thread pipe arm 36 are each provided with a shutter (not shown) on the base end side. Each shutter is opened and closed according to a signal from the unit controller 50. Thereby, the stop and generation of the suction flow from the lower thread suction port 32 and the upper thread suction port 35 are controlled.

  The winding unit main body 16 includes a cradle (holding portion) 23 that detachably supports the winding bobbin 22, a contact roller 29 that can rotate in contact with the peripheral surface of the winding bobbin 22 or the peripheral surface of the package 30, It has. The winding unit main body 16 includes an arm-type traverse device 70 for traversing the yarn 20 in the vicinity of the cradle 23. The traverse device 70 winds the yarn 20 around the package 30 while traversing the yarn 20. Is possible. A guide plate 28 is provided slightly upstream of the traverse portion. The guide plate 28 guides the upstream yarn 20 to a traverse location. A ceramic traverse fulcrum portion 27 is provided further upstream of the guide plate 28. The traverse device 70 traverses the yarn 20 in the direction indicated by the arrow in FIG. 2 with the traverse fulcrum portion 27 as a fulcrum.

  The cradle 23 is configured to be rotatable about a rotation shaft 48. The cradle 23 absorbs the increase in the diameter of the package 30 due to the winding of the yarn 20 around the winding bobbin 22 by the rotation of the cradle 23. The cradle 23 is provided with a rotation speed sensor 24 that measures the rotation speed of the package 30.

  The cradle 23 is attached with a package drive motor (package drive unit) 41 composed of a servo motor. The package drive motor 41 rotates the winding bobbin 22 to wind the yarn 20 around the winding bobbin 22. The package drive motor 41 is rotated in the forward direction by rotating the package 30 (the winding bobbin 22) in the winding direction and in the reverse rotation by rotating the package 30 in the opposite winding direction opposite to the winding direction. Can be rotated. 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 package drive control unit 42. The package drive control unit 42 controls the operation and stop of the package drive motor 41 in response to the operation signal from the unit control unit 50. 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 employed.

  An angle sensor 44 for detecting the angle of the cradle 23 is attached to the rotation shaft 48. The angle sensor 44 is composed of, for example, a rotary encoder, and transmits an angle signal corresponding to the angle of the cradle 23 to the unit controller 50. Since the angle of the cradle 23 changes as the diameter of the package 30 increases, the diameter of the package 30 can be detected by detecting the rotation angle of the cradle 23 by the angle sensor 44. As a configuration for detecting the diameter of the package 30, in addition to the angle sensor 44, a sensor using a Hall IC, an absolute encoder, or the like can be used. As a configuration for detecting the diameter of the package 30, an appropriate configuration can be used as long as the diameter of the package 30 can be detected.

  As a method of detecting the diameter of the package 30, for example, a detection method of detecting based on the total length of the yarn 20 wound around the package 30, the winding speed of the yarn 20, and the type (thickness etc.) of the yarn 20 is used. It may be used. As a method for detecting the diameter of the package 30, a method of measuring the time from the start of winding the yarn 20 onto the package 30 may be used. Specifically, the winding speed of the yarn 20 and the type (thickness, etc.) of the yarn 20 are grasped, and the relationship between the elapsed time from the winding start of the yarn 20 and the diameter of the package 30 is preliminarily determined. The diameter of the package 30 can be calculated based on the elapsed time.

  Further, as a method for detecting the diameter of the package 30, a method based on the traveling speed of the yarn 20 in the yarn traveling path between the yarn feeding bobbin 21 and the contact roller 29 may be used. Specifically, the traveling speed of the yarn 20 is detected by the yarn monitoring device 15 or a dedicated yarn speed sensor. The unit controller 50 calculates the traverse angle based on the traveling speed and traverse speed of the yarn 20, and calculates the peripheral speed of the package 30 from the traverse angle and the traveling speed. The diameter of the package 30 can be calculated based on the rotational speed of the package 30 and the peripheral speed of the package 30. When the diameter of the package 30 is calculated and obtained, the configuration for detecting the angle of the cradle 23 such as the angle sensor 44 may be omitted.

  As shown in FIGS. 2 and 3, the traverse device 70 includes a traverse drive motor 76, an output shaft 77, and a traverse arm 74. 3 is a view of the contact roller 29 as viewed in the axial direction. The rotation of the package 30 in the winding direction is clockwise in FIG. 3, and the rotation of the package 30 in the counter winding direction is counterclockwise in FIG.

  The traverse drive motor 76 is a motor that drives the traverse arm 74, and includes a servo motor or the like. The operation of the traverse drive motor 76 is controlled by a traverse control unit 78. The traverse drive motor 76 may be another motor such as a step motor or a voice coil motor. For example, a hook-shaped thread guide portion 73 is formed at the distal end portion of the traverse arm 74. The traverse arm 74 can guide the yarn 20 by the yarn guide portion 73. The yarn 20 can be traversed by the traverse arm 74 reciprocatingly turning in a state where the yarn guide portion 73 guides the yarn 20.

  The traverse control unit 78 is configured by hardware or the like using a dedicated microprocessor, and controls the operation and stop of the traverse drive motor 76 in response to a signal from the unit control unit 50. The power of the traverse drive motor 76 is transmitted to the base end portion of the traverse arm 74 via the output shaft 77. As the rotor of the traverse drive motor 76 rotates forward and backward, the traverse arm 74 performs a reciprocating swivel motion in a direction perpendicular to the paper surface of FIG. 3 (left and right direction of FIG. 2 (winding direction of the package 30)). In addition, the traverse arm 74 in FIG. 3 has shown the position in the edge part of a traverse.

  The unit controller 50 transmits a drive signal to the package drive controller 42 and controls the rotational drive of the package drive motor 41. The unit controller 50 controls the catching operation of the lower thread catching member 25 and the upper thread catching member 26 (rotation of the lower thread pipe arm 33 and the upper thread pipe arm 36). The unit control unit 50 controls the opening and closing of shutters provided in the lower thread pipe arm 33 and the upper thread pipe arm 36, and controls the stop and generation of the suction flow from the lower thread suction port 32 and the upper thread suction port 35. .

  In the present embodiment, the traverse control unit 78 has a creeping control unit (control unit) 78x, and the unit control unit 50 has a creeping rate switching unit (control unit) 50x. The creeping control unit 78x performs creeping by controlling the traverse device 70. Creeping is a process of periodically changing the traverse width. Specifically, creeping is a process of periodically performing a change that pulsatically (temporarily) narrows the traverse width from the set traverse width as time elapses (rotation of the package 30).

  When the yarn 20 is wound around the package 30 to form the first yarn layer 30a (see FIG. 6C), the creeping control unit 78x performs creeping at a normal creeping rate (first creeping rate). First creeping control is performed. The creeping control unit 78x performs the first creeping control to form the first yarn layer 30a, and then winds the yarn 20 around the package 30 to form the second yarn layer 30b (see FIG. 6C). At this time, second creeping control is performed in which creeping is performed at a winding end creeping rate (second creeping rate) lower than the normal creeping rate. Note that the creeping rate at the end of winding may be 0%. In this case, creeping is not performed.

  The creeping rate switching unit 50x switches the creeping rate of creeping by the creeping control unit 78x. That is, the creeping rate switching unit 50x switches between execution of the first creeping control and the second creeping control. When the full pipe ratio of the current package 30 reaches the end of winding and reaches the creeping switching full pipe ratio, the creeping rate switching unit 50x transmits a winding end creeping switching command to the traverse control unit 78, and sets the creeping rate to normal. Switching from creeping rate to end-of-winding creeping rate (details will be described later).

  FIG. 4A is a diagram illustrating creeping performed by the creeping control unit 78x, and FIG. 4B is a partially enlarged view of FIG. 4A. In FIG. 4A, the vertical axis represents time T, and the horizontal axis represents the traverse width H. FIG. 4A shows a part of the trajectory of the yarn 20 wound around the package 30 in a planar manner.

  As shown in FIG. 4A, the creeping amount is a change amount (reduction amount) of the traverse width H in creeping. The creeping time is a time during which the traverse width H changes during creeping. For example, within the creeping time, the traverse width H becomes narrower from the set traverse width along with the winding of the yarn 20, becomes narrower by the creep amount than the set traverse width, and then expands until it returns to the set traverse width. .

  The creeping rate is a value obtained by dividing the creeping amount by the set traverse width before the change. Decreasing the creeping rate means reducing the degree of narrowing of the traverse width H (reducing the degree of creeping) or not reducing the traverse width H with respect to the set traverse width. By reducing the creeping rate, the amount of creeping is reduced within a certain creeping time, so that the reduction amount ΔH (see FIG. 4B) of the traverse width H per unit time ΔT is reduced.

  In other words, the creeping control unit 78x and the creeping rate switching unit 50x are configured as follows. That is, the creeping control unit 78x periodically executes a traverse width change that pulsatically narrows the traverse width H as the yarn 20 is wound. When forming the first yarn layer 30a, the creeping control unit 78x periodically changes the traverse width at the first change rate, and forms the second yarn layer 30b after forming the first yarn layer 30a. The traverse width change is periodically executed at a second change rate lower than the first change rate. The creeping rate switching unit 50x switches the change rate of the traverse width change by the creeping control unit 78x. The creeping rate switching unit 50x transmits a winding end creeping switching command to the traverse control unit 78 when the current full filling rate of the package 30 reaches the creeping switching full filling rate, and the change ratio is Switch from 1 change rate to 2nd change rate. The change rate is a change amount ΔH of the traverse width H per unit time ΔT.

  The normal creeping rate and the end-of-winding creeping rate are set by the setting unit 91 of the machine base control device 90 via the unit control unit 50. The setting unit 91 functions as a creeping rate setting unit, and sets the normal creeping rate and the winding end creeping rate of each winder unit 10 individually or collectively.

  The timing for starting the formation of the second yarn layer 30 b in the package 30 is set by the setting unit 91 of the machine base control device 90 via the unit control unit 50. The setting unit 91 functions as a timing setting unit, and sets the start timing for forming the second yarn layer 30b of the package 30 of each winder unit 10 individually or collectively.

  The timing for starting the formation of the second yarn layer 30b is the time immediately before the end of winding of the package 30, and in this embodiment, the time when the current full tube rate of the package 30 reaches the end of winding and the creeping switching full tube rate. It is said that. For example, the timing of starting the formation of the second yarn layer 30b can be a point in time when the yarn layer thickness of the package 30 is 90% or more and less than 100% of the preset target yarn layer thickness. Can be at the point of 99% of the target yarn layer thickness. Further, for example, the timing of starting the formation of the second thread layer 30b can be a time point when the diameter of the package 30 is 90% or more and less than 100% of a preset target package diameter. The time may be 99% of the package diameter. The yarn layer thickness and diameter of the package 30 can be obtained by using the method for detecting the diameter of the package 30 described above.

  Further, for example, the timing for starting the formation of the second yarn layer 30b is a time point when the winding length of the yarn 20 wound around the package 30 is 90% or more and less than 100% of a preset target winding length. Specifically, it can be 99% of the target winding length. The winding length of the yarn 20 can be detected by using a non-contact photoelectric constant length device. The winding length may be calculated by providing a sensor that detects a pulse for each rotation of the contact roller 29 and counting the number of pulses by the unit controller 50.

  The unit control unit 50 controls the package drive control unit 42 and the traverse control unit 78. The traverse control unit 78 controls the winding type of the yarn 20 of the first yarn layer 30a and the second yarn layer 30b. The traverse control unit 78 forms the first yarn layer 30a by at least one of random winding, step precision winding, and precision winding. The traverse control unit 78 forms the second yarn layer 30b by at least one of step precision winding and precision winding.

  Random winding is a winding type in which the yarn 20 is wound around the package 30 at a constant angle. In random winding, the ratio between the winding speed of the yarn 20 and the traverse speed is constant, and the number of winds (the rotation in which the package 30 rotates during one reciprocal traverse) changes as the diameter of the package 30 changes. In the yarn layer formed by random winding, the hardness and density can be kept constant.

  Step precision winding is a winding type in which the yarn 20 is wound around the package 30 while keeping the twill angle within a certain range close to a predetermined angle (basic twill angle) by switching the number of winds in a step shape. In step precision winding, when the number of winds approaches the following series of controls, ie, the number of dangerous winds where ribbon winding occurs, the number of dangerous winds is changed by changing the winding angle from a constant state (traverse jump). After avoiding this, the control of returning to a certain state is repeated. According to step precision winding, the ribbon 20 is not generated at all, and the yarns 20 can be wound with the twills of the package 30 aligned (equal pitches of adjacent twills).

  Precision winding is a winding type in which the yarn 20 is wound around the package 30 while maintaining the number of winds at a constant value regardless of the diameter of the package 30. In precision winding, the twill angle decreases as the diameter of the package 30 increases. In precision winding, the ratio between the angular velocity of the package 30 and the angular velocity of the traverse is constant. According to precision winding, the yarn 20 can be wound by aligning the twill of the package 30 without generating any ribbon winding region.

  Next, a creeping method (a method for manufacturing the package 30) performed in the winder unit 10 will be described with reference to the flowchart of FIG.

  First, the winding end creeping switching full pipe ratio is set in the setting unit 91 of the machine base control device 90 (S1). As described above, the full pipe ratio at the end of winding creeping switching can be set as the yarn layer thickness of the package 30, the diameter of the package 30, or the winding length of the yarn 20 wound around the package 30. . Moreover, the winding end creeping rate is set in the setting unit 91 of the machine base control device 90 (S2). In addition, the execution order of said S1 and said S2 is random order.

  Subsequently, the unit controller 50 determines whether the yarn 20 is currently being wound around the package 30 (S3). If winding is not in progress, the process is terminated as it is. On the other hand, when winding is in progress, the unit controller 50 determines whether the package 30 is full (S4). If the package 30 is already full, the winding is stopped and the process is terminated (S5).

  On the other hand, if the package 30 is not full, the creeping rate switching unit 50x determines whether or not a winding end creeping switching command has been transmitted to the creeping control unit 78x (S6). When the winding end creeping switching command has not been transmitted to the creeping control unit 78x, the creeping rate switching unit 50x determines whether or not the current full pipe rate is equal to or higher than the winding end creeping switching full tube rate. (S7). If the current full pipe ratio is equal to or greater than the end-of-winding creeping switching full-pipe ratio, an end-of-winding creeping switching command is transmitted from the creeping ratio switching unit 50x to the creeping control unit 78x (S8).

  When receiving the end-of-winding creeping switching command (YES in S6 or after S8), the creeping control unit 78x sets the current creeping rate to the end-of-winding creeping rate (S10). If the current full pipe rate is not equal to or higher than the creeping switching full pipe rate at the end of winding (NO in S7), the current creeping rate is set to the normal creeping rate by the creeping control unit 78x (S11). After S10 or S11, the creeping operation by the traverse device 70 is updated, and the process returns to S3 (S12).

  As described above, when the yarn 20 is wound around the package 30 while creeping at the normal creeping rate to form the first yarn layer 30a, the full pipe rate reaches the creeping switching full pipe rate at the end of winding. The yarn 20 is wound around the package 30 while creeping at a winding end creeping rate lower than the normal creeping rate, and the second yarn layer 30b is formed on the surface layer side of the package 30.

  FIG. 6A is a diagram showing a surface layer of a package 30 ′ formed by creeping at a normal creeping rate without switching the creeping rate. FIG. 6B is a diagram showing the surface layer of the package 30 formed according to the present embodiment. FIG. 6C is a cross-sectional view showing the surface layer side of the package 30 formed according to this embodiment. The winding form of the package 30 'is a step precision winding.

  In the package 30 ', creeping at a normal creeping rate is performed from the start of winding to the end of winding. In this package 30 ′, the traverse width H changes greatly with respect to creeping at the end-of-winding creeping rate, so that the pitch at which the yarns 20 are arranged changes greatly as shown in FIG. Therefore, the arranged yarns 20 are overlapped or the pitches of the yarns 20 are different, and when the outer peripheral surface of the package 30 ′ is touched with a hand, a coarse / dense portion is present (a hard portion is present).

  As shown in FIGS. 6B and 6C, the package 30 according to this embodiment is manufactured by being wound by the winder unit 10, and thus has the following configuration. . The package 30 includes a first yarn layer 30a formed by winding the yarn 20 while performing creeping at a normal creeping rate, and creeping at a winding end creeping rate provided on the first yarn layer 30a. A second yarn layer 30b formed by winding the yarn 20 while performing. In other words, the package 30 is provided with the first yarn layer 30a formed by winding the yarn while periodically changing the traverse width at the first change rate, and the second change provided on the first yarn layer 30a. And a second yarn layer 30b formed by winding the yarn 20 while periodically changing the traverse width at a ratio.

  The first yarn layer 30a of the package 30 is formed by at least one of random winding, step precision winding, and precision winding. The second yarn layer 30b of the package 30 is formed by at least one of step precision winding and precision winding. As shown in FIG. 6B, the second yarn layer 30b of the package 30 is exposed to the outside, and the outermost layer yarn (surface layer cross stitch) 30s in the second yarn layer 30b is arranged at an equal pitch. Has been.

  As described above, according to the winder unit 10, the yarn 20 is wound around the package 30 while creeping at a normal creeping rate to form the first yarn layer 30a, and then the yarn is being creeped at the creep rate at the end of winding. 20 is wound around the package 30 to form the second yarn layer 30b. By performing creeping during winding, the ear height of the package 30 can be suppressed. In addition, it is possible to reduce the creeping rate in the second yarn layer 30b in the vicinity of the full pipe on the surface layer side, and to suppress the formation of a coarse / dense portion.

  In other words, according to the winder unit 10, the yarn 20 is wound around the package 30 while periodically changing the traverse width at the first change rate to form the first yarn layer 30a, and then lower than the first change rate. The yarn 20 is wound around the package 30 while periodically changing the traverse width at the second change rate to form the second yarn layer 30b. By changing the traverse width during winding, the ear height of the package 30 can be suppressed. In addition, it is possible to reduce the change rate of the traverse width change in the second yarn layer 30b in the vicinity of the full pipe on the surface layer side, and to suppress the formation of a dense portion.

  As a result, the appearance of the package 30 is improved by aligning the twills on the surface layer side of the package 30, and the surface layer side of the package 30 is fully aligned regardless of the difference in the full tube diameter and / or weight of the package 30. Can be wound with Ayame. The package 30 can be a soft wound package for dyeing purposes. In this case, since the soft winding package basically increases the creeping rate and softens the ears, even when the creeping rate is reduced at the end of winding, there is an effect that troubles during handling of the package 30 hardly occur. can get.

  In the winder unit 10, the winding end creeping rate is set by the setting unit 91. Accordingly, the second yarn layer 30b can be formed by creeping at a desired winding end creeping rate.

  In the winder unit 10, the setting end 91 sets the winding end creeping switching full pipe ratio, which is the timing for starting the formation of the second yarn layer 30 b. Thereby, the amount (yarn length and / or thickness in the second yarn layer 30b) for forming the second yarn layer 30b can be adjusted as desired.

  In the winder unit 10, when the formation of the second yarn layer 30 b is started, when the yarn layer thickness of the package 30 is 90% or more and less than 100% of the target yarn layer thickness, the diameter of the package 30 is equal to the target package diameter. A time point of 90% or more and less than 100%, or a time point when the winding length of the yarn 20 wound around the package 30 is 90% or more and less than 100% of the target winding length is set. In this case, since the formation of the second thread layer 30b is not started at an early stage, it is possible to suppress the generation of annual rings due to the thick thread layers having different densities.

  The package 30 includes a first yarn layer 30a formed by winding the yarn 20 while performing creeping at a normal creeping rate, and a winding end cushion provided on the first yarn layer 30a and lower than the normal creeping rate. And a second yarn layer 30b formed by winding the yarn 20 while creeping at a creeping rate. According to this package 30, similar to the above effect, creeping is performed to suppress the ear height of the package 30, and in the vicinity of the full pipe on the surface layer side, the creeping rate is lowered to form a rough portion. Can be suppressed.

  In other words, the package 30 is provided on the first yarn layer 30a and the first yarn layer 30a formed by winding the yarn 20 while periodically changing the traverse width at the first change rate. A second yarn layer 30b formed by winding the yarn 20 while periodically changing the traverse width at a second change rate lower than the rate. According to the package 30, similarly to the above-described effect, the traverse width change is performed to suppress the ear height of the package 30. Can be suppressed.

  In the package 30, the outermost yarns 30s in the second yarn layer 30b are arranged at an equal pitch. In this case, it is possible to provide the package 30 with good appearance and touch.

  In the package 30, the first yarn layer 30a is formed by at least one of random winding, step precision winding, and precision winding, and the second yarn layer 30b is formed by at least one of step precision winding and precision winding. Is formed. In this case, it is possible to provide the package 30 with good appearance and touch. In particular, in the package 30, creeping or traverse width change is performed in the second yarn layer 30b formed by step precision winding or precision winding, but the pitch of the arranged yarns 20 is prevented from being non-uniform. Then, it becomes possible to align the twill.

  The package 30 is manufactured by winding the yarn 20 by the winder unit 10 to manufacture the package 30. Also in this manufacturing method, it is possible to suppress the formation of a dense portion on the surface layer side of the package 30 while suppressing the height of the package 30 as in the above-described effects.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. In the above embodiment, the package 30 is directly rotated by the package drive motor 41. However, in the present invention, the contact roller 29 may be rotated to drive the package 30.

  In the case of forming the second yarn layer 30b in the above embodiment, the traverse width change is increased by increasing the creeping time under the condition that the creeping amount is constant as compared with the case of forming the first yarn layer 30a. The change rate (change amount ΔH of traverse width H per unit time ΔT) may be lowered.

  In the above embodiment, when the second thread layer 30b is formed, the number of times the traverse width H changes per predetermined time is smaller than when the first thread layer 30a is formed (the period of change of the traverse width H is set to be smaller). Long). Also in this case, it is possible to suppress the formation of the dense portion on the surface layer side while suppressing the ear height of the package 30 due to the change in the traverse width, similarly to the above-described effect.

  In the above embodiment, the first thread layer 30a is formed, the second thread layer 30b is formed, and at least one of the first thread layer 30a and the second thread layer 30b. The yarn 20 is wound around the package 30 while creeping at an Nth creeping rate different from the first and second creeping rates, or while changing the traverse width at a change rate different from the first and second change rates. You may take (N is an integer greater than or equal to 3). In this case, at least one of the first thread layer 30a, the second thread layer 30b, the second thread layer 30b, and the first thread layer 30a and the second thread layer 30b may be at least one of the first thread layer 30a and the second thread layer 30b. An N yarn layer can be formed.

  In the above embodiment, the creeping control unit 78x and the creeping rate switching unit 50x are configured separately, but they may be configured integrally. In the above embodiment, the unit control unit 50, the package drive control unit 42, and the traverse control unit 78 are provided separately. However, at least one of the package drive control unit 42 and the traverse control unit 78 is provided as the unit control unit 50. And may be provided together (integrally). In addition, the setting part 91 may be provided in the unit control part 50 of each winder unit 10, and the said setting part 91 may function as a creeping rate setting part and a timing setting part. In the above embodiment, the normal creeping rate (first creeping rate) is not necessarily constant, and may vary depending on the yarn layer to be formed. The second creeping rate may be lower than the normal creeping rate immediately before switching to the second creeping rate.

  DESCRIPTION OF SYMBOLS 10 ... Winder unit (yarn winding machine), 30 ... Package, 30a ... 1st yarn layer, 30b ... 2nd yarn layer, 30s ... Outermost layer yarn, 41 ... Package drive motor (package drive part), 50x ... Creeping Rate switching unit (control unit), 70 ... traverse device, 78x ... creeping control unit (control unit), 91 ... setting unit (creeping rate setting unit, timing setting unit).

Claims (10)

A package driving section for rotating the package;
A traverse device for traversing the yarn wound around the package;
A control unit for controlling the traverse device to perform creeping,
The yarn is wound around the package while performing the creeping at the first creeping rate to form the first yarn layer, and then the creeping is performed at the second creeping rate lower than the first creeping rate. A yarn winding machine that winds the yarn around the package to form a second yarn layer.   The yarn winding machine according to claim 1, further comprising a creeping rate setting unit that sets the second creeping rate. A package driving section for rotating the package;
A traverse device for traversing the yarn wound around the package;
A control unit that controls the traverse device and periodically performs a traverse width change that pulsatically narrows the traverse width as the yarn is wound,
The yarn is wound around the package while periodically changing the traverse width at a first change rate to form a first yarn layer, and then the traverse width change at a second change rate lower than the first change rate. A yarn winder that winds the yarn around the package to form a second yarn layer while periodically performing the step.   The yarn winding machine according to any one of claims 1 to 3, further comprising a timing setting unit that sets a timing for starting the formation of the second yarn layer.   The timing setting unit, as the timing, points in time when the yarn layer thickness of the package is 90% or more and less than 100% of the target yarn layer thickness, and when the diameter of the package is 90% or more and less than 100% of the target package diameter. The yarn winding machine according to claim 4, wherein a time point at which the winding length of the yarn wound on the package is 90% or more and less than 100% of the target winding length is set. A first yarn layer formed by winding the yarn while creeping at a first creeping rate;
A second yarn layer provided on the first yarn layer and formed by winding the yarn while creeping at a second creeping rate lower than the first creeping rate. . A first yarn layer formed by winding the yarn while periodically performing a change in the traverse width that pulsatically narrows the traverse width as the yarn is wound;
A second yarn layer provided on the first yarn layer and formed by winding the yarn while periodically performing the traverse width change at a second change rate lower than the first change rate. Have a package.   The package according to claim 6 or 7, wherein the outermost yarns in the second yarn layer are arranged at an equal pitch. The first yarn layer is formed by at least one of random winding, step precision winding, and precision winding,
The package according to any one of claims 6 to 8, wherein the second yarn layer is formed by at least one of step precision winding and precision winding.   A package manufacturing method in which the yarn is wound around the package by the yarn winding machine according to claim 1 to manufacture the package.