JP2009227412A - Yarn winder and yarn winding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn winder capable of suppressing the generation of a growth ring and the occurrence cob-webbing by changing a control method for a traverse width in an accelerated winding zone flexibly according to, for example, a yarn winding method. <P>SOLUTION: An automatic winder comprises a package drive motor 41, a traverse drive motor 45, and a traverse width shortening part 63. The traverse drive motor 45 drives a traverse guide 11 for traversing a yarn 20 wrapped around a winding bobbin 22 rotated by the package drive motor 41 so as to reciprocate. The traverse width shortening part 63 comprises a shortened width constant mode in which the traverse drive motor 45 is so controlled that a traverse is performed in the accelerated winding zone in a constant shortened traverse width smaller than the target traverse width according to the initial traverse width set by a setter 51 and a shortened width changing mode in which the traverse drive motor 45 is so controlled that a traverse is performed in a traverse width continuously increased from the shortened traverse width when a winding speed is increased. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a yarn winding machine, and more particularly to control of a traverse amplitude in an acceleration winding section.

  In a yarn winding machine that winds a yarn around a winding bobbin while traversing and generates a package of a predetermined length, when the winding bobbin starts winding, the start of rotation is not smooth, and the rotation is irregular and sudden. Often started. Further, since the winding speed fluctuates until the winding speed reaches a predetermined winding speed, the tension generated in the traveling yarn also varies according to the winding speed. For this reason, the acceleration winding section from the start of winding to the predetermined winding speed is in an unstable state in which the yarn tension is likely to fluctuate.

  When the tension of the yarn is not stable, the behavior of the yarn wound around the package is not stable, so that the twill is likely to occur. To avoid this, Patent Document 1 discloses a yarn winding device (yarn winding machine) configured to control to shorten the traverse amplitude until the winding speed of the winding bobbin reaches a predetermined winding speed. Has been.

The yarn winding device disclosed in Patent Document 1 is a winding bobbin rotation drive motor for rotationally driving a winding bobbin for winding a yarn, and traverses the yarn when winding the yarn around the winding bobbin. A traverse apparatus. The traverse device includes a traverse guide for engaging the yarn and traversing the yarn, a traverse guide drive motor for driving the traverse guide to be driven separately from the take-up bobbin rotation drive motor, and Have. The yarn winding device further includes a control device that controls the winding bobbin rotation driving motor and the traverse guide driving motor. The control device includes a winding acceleration unit that accelerates the winding bobbin rotation driving motor from zero speed to a predetermined speed, and at least immediately after the winding bobbin rotation driving motor rotates by the winding acceleration unit, the traverse Traverse stroke shortening means for controlling the traverse guide drive motor so as to narrow the traverse stroke of the guide. According to Japanese Patent Laid-Open No. 2004-228688, this configuration can prevent traversing even in an accelerated winding section where the yarn tension is unstable by shortening the traverse width in the accelerated winding section.
Japanese Patent Laid-Open No. 2007-210776

  However, in winding a yarn using a yarn winding machine, the winding speed may not be accelerated from zero to a predetermined speed in a short time. For example, when winding high-quality yarn or fine count yarn, it is necessary to accelerate the winding speed more slowly than usual in order to reduce fluctuations in winding tension. Must be secured longer than usual.

  In this regard, in the configuration of Patent Document 1, when the acceleration winding section becomes longer, the yarn layer formed in the reduced traverse width portion becomes thicker, and when the acceleration winding section ends, the normal traverse width starts from above. Thus, a yarn layer is formed. Accordingly, a step due to the difference in traverse width is generated on the package surface. Further, in a general yarn winding machine, when yarn breakage or yarn cutting occurs during the winding operation, the winding bobbin is temporarily stopped and the winding speed is accelerated again after the yarn joining operation. Therefore, each time the winding is stopped, the step is formed and stacked on the surface of the package, which causes an annual ring that is one of the package defects.

  Further, in the yarn winding machine configured to contact the contact roller with the peripheral surface of the package and wind the yarn while nipping the yarn between the contact roller and the package, a step is formed on the package surface as described above. This will cause the yarn nip to weaken at the axial end of the package. When the nip force is reduced in this way, the winding position at the end of the package becomes unstable, causing a traverse.

  Further, when winding a yarn with a yarn winding machine, a phenomenon (so-called ear height) in which the surface of the yarn layer swells in the diameter-expanding direction in the vicinity of both ends in the axial direction may occur as the package becomes thicker. In this regard, in the configuration of Patent Document 1, even when the package is rotating at a considerably high speed immediately before the end of the acceleration winding section, the yarn is not traversed to the end side of the package. Therefore, the surface of the yarn layer at the top portion of the package is repeatedly covered with the contact roller many times as the package rotates without being covered with new yarn. For this reason, the yarn layer at the top of the ear is easily damaged by friction with the contact roller, which may cause yarn breakage.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to flexibly change the control method of the traverse amplitude of the acceleration winding section in accordance with the yarn winding method. An object of the present invention is to provide a yarn winding machine that can suppress occurrence of falling.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to the first aspect of the present invention, the following configuration is provided in a yarn winding machine that forms a package by winding a yarn around a winding bobbin. That is, the yarn winding machine includes a winding drive unit, a winding drive control unit, a traverse guide, a traverse guide drive unit, a traverse amplitude control unit, and a setting unit. The winding drive unit rotationally drives the winding bobbin. The winding drive control unit controls the rotation speed of the winding driving unit and controls the winding speed of the yarn. The traverse guide traverses the yarn wound around the winding bobbin. The traverse guide driving unit reciprocates the traverse guide. The traverse amplitude controller controls the traverse amplitude of the traverse guide. The setting unit is configured to set a traverse amplitude of the traverse guide. The traverse amplitude controller has a first control mode and a second control mode as control modes for controlling traverse amplitude until the winding speed of the winding bobbin reaches a predetermined winding speed. . In the first control mode, the traverse amplitude controller controls the traverse guide driving unit to traverse with a constant reduced traverse amplitude narrower than a target traverse amplitude based on the set traverse amplitude set by the setting unit. Control. In the second control mode, the traverse amplitude controller has a traverse amplitude that continuously increases as the winding speed increases from a reduced traverse amplitude that is narrower than a target traverse amplitude based on the set traverse amplitude set by the setting portion. The traverse guide driving unit is controlled to traverse.

  As a result, traverse vibration is performed with a narrower traverse amplitude after reaching the predetermined winding speed until the winding speed of the winding bobbin reaches the predetermined winding speed. It is possible to prevent twill due to fluctuations. Further, since the control mode for controlling the traverse amplitude until the winding speed reaches a predetermined winding speed can be selected from the two control modes, it is possible to flexibly cope with the package winding method and the like. Furthermore, when the second control mode is selected, the twill amplitude continuously increases from the reduced state according to the winding speed, so that a step is generated on the surface between the center portion and the end portion of the package. Can be prevented. Accordingly, it is possible to prevent the generation of annual rings and to prevent the winding position from becoming unstable due to the step of the package and causing the traversing. Further, in the second control mode, even when the ear height is generated at the axial end of the package during winding, the twill amplitude is gradually enlarged during winding acceleration, and eventually The thread is traversed so as to cover the ear high part. Accordingly, it is possible to avoid excessively rubbing the same portion of the yarn on the surface of the yarn layer at the height of the ear, and to prevent occurrence of yarn breakage due to damage.

  According to a second aspect of the present invention, in a yarn winding method for winding a yarn around a winding bobbin to form a package, a method including the following steps is provided. That is, in the first step, the control mode in which the traverse amplitude until the winding speed of the winding bobbin reaches a predetermined winding speed is shortened from the traverse amplitude in the steady state is the first control mode and the second control mode. Choose from. In the second step, when the first control mode is selected in the first step, the yarn is wound while traversing at a constant reduced traverse amplitude smaller than the normal traverse amplitude, and the first step When the second control mode is selected, the yarn is wound while traversing at a traverse amplitude that continuously increases as the winding speed increases from a reduced traverse amplitude smaller than the normal traverse amplitude.

  As a result, traverse vibration is performed with a narrower traverse amplitude after reaching the predetermined winding speed until the winding speed of the winding bobbin reaches the predetermined winding speed. It is possible to prevent twill due to fluctuations. In addition, since the control mode for controlling the traverse amplitude until the winding speed reaches a predetermined winding speed can be selected from two control modes in the first step, it is possible to flexibly cope with the winding method of the package. it can. Furthermore, when the second control mode is selected, the twill amplitude continuously increases from the reduced state according to the winding speed, so that a step is generated on the surface between the center portion and the end portion of the package. Can be prevented. Accordingly, it is possible to prevent the generation of annual rings and to prevent the winding position from becoming unstable due to the step of the package and causing the traversing. Further, in the second control mode, even when the ear height is generated at the axial end of the package during winding, the twill amplitude is gradually enlarged during winding acceleration, and eventually The thread is traversed so as to cover the ear high part. Accordingly, it is possible to avoid excessively rubbing the same portion of the yarn on the surface of the yarn layer at the height of the ear, and to prevent occurrence of yarn breakage due to damage.

  According to a third aspect of the present invention, a package formed by the yarn winding method is provided.

  As a result, the occurrence of fallen rings and annual rings can be prevented, and even when an ear height occurs during winding, there is little accumulation of damage to the yarn, so that a high-quality package can be provided.

  According to the 4th viewpoint of this invention, the following structures are provided in the yarn winding machine which winds a thread | yarn around a winding bobbin and forms a package. That is, the yarn winding machine includes a winding drive unit, a winding drive control unit, a traverse guide, a traverse guide drive unit, a traverse amplitude control unit, and a setting unit. The winding drive unit rotationally drives the winding bobbin. The winding drive control unit controls the rotation speed of the winding driving unit and controls the winding speed of the yarn. The traverse guide traverses the yarn wound around the winding bobbin. The traverse guide driving unit reciprocates the traverse guide. The traverse amplitude controller controls the traverse amplitude of the traverse guide. The setting unit is configured to set a traverse amplitude of the traverse guide. The twill amplitude control unit includes a twill amplitude changing unit. The traverse amplitude changing unit starts winding from a reduced traverse amplitude smaller than a target traverse amplitude based on the set traverse amplitude set by the setting unit until the winding speed of the winding bobbin reaches a predetermined winding speed. The traverse guide driving unit is controlled so as to traverse with a traverse amplitude that continuously increases as the picking speed increases.

  This prevents traversing at the start of winding with unstable tension, and the traverse amplitude continuously increases from the reduced state according to the winding speed, so between the center and end of the package. Thus, it is possible to prevent a step from being generated on the surface. Therefore, the generation of annual rings can be prevented, and the winding position can be prevented from becoming unstable due to the level difference of the package, and the falling can be prevented. In addition, even if the ear height is generated in the package during winding, the yarn layer is formed so as to cover the ear height portion at the end of the acceleration winding section, so that the ear height portion is rubbed strongly. This can prevent thread breakage.

  Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view and a block diagram showing a winder unit provided in an automatic winder according to an embodiment of the present invention.

  The winder unit 10 shown in FIG. 1 is configured to wind a yarn 20 unwound from a yarn feeding bobbin 21 around a winding bobbin 22 while traversing it to form a package 30 having a predetermined length and a predetermined shape. The automatic winder (yarn winding machine) of this embodiment includes a plurality of winder units 10 arranged side by side, and an unillustrated machine base control device arranged at one end in the arranged direction.

  Each winder unit 10 includes a winding unit main body 16 and a unit control unit 50.

  The winding unit main body 16 includes a balloon controller 12, a tension applying device 13, a splicer device 14, and the like in order from the yarn supplying bobbin 21 side in a yarn traveling path between the yarn supplying bobbin 21 and the winding bobbin 22. And a clearer (yarn quality measuring device) 15 are arranged.

  The balloon controller 12 assists the unwinding of the yarn from the yarn supplying bobbin 21 by lowering the regulating member 40 covering the core tube of the yarn supplying bobbin 21 in conjunction with the unwinding of the yarn from the yarn supplying bobbin 21. Is. The regulating member 40 contacts the balloon formed on the upper portion of the yarn feeding bobbin 21 by the rotation and centrifugal force of the yarn unwound from the yarn feeding bobbin 21, and applies the appropriate tension to the balloon to release the yarn. Assist the cocoon. An unillustrated sensor for detecting the chase portion of the yarn feeding bobbin 21 is provided in the vicinity of the restricting member 40. When this sensor detects the descent of the chase portion, the restricting member 40 is followed accordingly. For example, it can be lowered by an air cylinder (not shown).

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

  The splicer device 14 detects the lower thread on the yarn feeding bobbin 21 and the package 30 side when the clearer 15 detects a yarn defect and performs yarn cutting or when the yarn breakage occurs during unwinding from the yarn feeding bobbin 21. The upper thread is spliced. As a yarn joining device for joining such an upper yarn and a lower yarn, a mechanical device, a device using a fluid such as compressed air, or the like can be used.

  The clearer 15 includes a clearer head 49 in which a sensor (not shown) for detecting the thickness of the yarn 20 is disposed, and an analyzer 52 that processes a yarn thickness signal from the sensor. The clearer 15 is configured to detect a yarn defect such as a slab by monitoring a yarn thickness signal from the sensor. The clearer 15 can also function as a sensor that detects the traveling speed of the yarn 20 and a sensor that simply detects the presence or absence of the yarn 20. In the vicinity of the clearer head 49, a cutter 39 is provided for cutting the yarn 20 immediately when the clearer 15 detects a yarn defect.

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

  The take-up unit main body 16 includes a cradle 23 that removably supports a take-up bobbin (paper tube, core tube) 22 and a contact roller 29 that can be driven and rotated by contacting the peripheral surface of the package 30. ing. The cradle 23 is configured such that it can be rotatably supported by sandwiching both ends of the take-up bobbin 22. Further, the cradle 23 is configured to be rotatable around a rotation shaft 48 so that the thickening accompanying the winding of the yarn 20 onto the winding bobbin 22 can be absorbed by the rotation of the cradle 23. It is configured.

  A package drive motor (winding drive unit) 41 is attached to a portion of the cradle 23 that sandwiches the winding bobbin 22, and the winding bobbin 22 is rotationally driven by the package driving motor 41 to wind the yarn 20. It is configured as follows. 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 a package drive control unit (winding drive control unit) 42, and the package drive control unit 42 receives an operation signal from the unit control unit 50 and operates the package drive motor 41. It is configured to control the stop. The package drive control unit 42 is configured as a microcomputer and includes a CPU, a ROM, a RAM, and the like. In addition, the package drive control unit 42 includes a winding acceleration unit 62 that controls the package drive motor 41 so as to accelerate the rotation of the winding bobbin 22.

  A package rotation sensor 43 is attached to the cradle 23. The package rotation sensor 43 rotates the take-up bobbin 22 attached to the cradle 23 (the rotation of the yarn layer 31 formed on the take-up bobbin 22). ) Is detected. The rotation detection signal of the winding bobbin 22 is transmitted from the package rotation sensor 43 to the package drive control unit 42 and the unit control unit 50. Further, the rotation detection signal is input to a traverse control unit 46 described later.

  The cradle 23 is attached with a package diameter sensor (diameter sensor) 44 composed of a rotary encoder or the like. The package diameter sensor 44 transmits a detection signal of the rotation angle of the cradle 23 to the unit controller 50. The unit controller 50 calculates the package diameter based on the received detection signal. The unit control unit 50 transmits the calculated package diameter to the package drive control unit 42 and the traverse control unit 46.

  The traverse device 27 is provided in the vicinity of the contact roller 29, and the traverse device 27 allows the yarn 20 to be wound around the package 30 while traversing. The traverse device 27 includes a traverse guide (traverse guide) 11 provided so as to be reciprocally movable in the traverse direction, and a traverse drive motor (traverse guide drive unit) 45 that reciprocally drives the traverse guide 11. Yes.

  The traverse device 27 is provided with the traverse guide 11 in the shape of a hook at the end of an elongated arm member 28 configured to be rotatable around a support shaft, and the arm member 28 is moved by the traverse drive motor 45 as indicated by the arrow in FIG. It is the structure which carries out reciprocating turning drive like this. In this embodiment, the traverse drive motor 45 is a servo motor.

  The operation of the traverse drive motor 45 is controlled by a traverse control unit 46. The traverse control unit 46 is configured to control the operation / stop of the traverse drive motor 45 in response to a signal from the unit control unit 50. Yes. The traverse device 27 includes a traverse sensor 47 formed of a rotary encoder or the like, and can detect a turning position of the arm member 28 (and thus a position of the traverse guide 11) and transmit a position signal to the traverse control unit 46. It is configured as follows.

  The traverse control unit 46 is configured as a microcomputer and includes a CPU, a ROM, a RAM, and the like. The traverse control unit 46 includes a traverse width shortening unit (twill amplitude control unit) 63 that controls the traverse drive motor 45 so as to shorten the traverse width (traverse stroke) of the traverse guide 11 under predetermined conditions.

  In this embodiment, as shown in FIG. 1, the package drive motor 41 and the traverse drive motor 45 are provided separately, and the winding bobbin 22 and the traverse guide 11 are driven (controlled) separately and independently. It is configured as follows. Accordingly, the yarn 20 can be wound around the winding bobbin 22 by various winding methods such as precision winding and step precision winding.

  Next, the electrical configuration of the winding unit body 16 will be described. As shown in FIG. 1, a package drive control unit 42 that controls the package drive motor 41, a traverse control unit 46 that controls the traverse drive motor 45, an analyzer 52 that drives the cutter 39, and a solenoid 38 of the tension applying device 13. In addition, the splicer device 14 and the like are controlled by a unit control unit 50 as a control unit.

  The unit control unit 50 is configured as a microcomputer, and includes a CPU, a ROM, a RAM, and the like (not shown). Further, the unit control unit 50 includes various control means, and sends a predetermined signal to each device and each unit as the control target listed above to control the yarn 20 to be wound up. In addition, control such as yarn joining operation at the time of yarn breakage or yarn cutting is performed. Specifically, the unit control unit 50 transmits various control parameters to the package drive control unit 42 to cause the package drive control unit 42 to control the package drive motor 41. In addition, the unit control unit 50 transmits various control parameters to the traverse control unit 46 to cause the traverse control unit 46 to control the traverse drive motor 45.

  The unit controller 50 is electrically connected to a setting device (setting unit) 51. The setting device 51 includes a display screen and an operation unit (not shown), and is configured so that an operator can perform various operations of the winder unit 10. Specifically, the setting device 51 controls the winding speed (set winding speed) during the winding operation, the initial traverse width (set traverse width), and the traverse width control method (control) in the acceleration winding section described later. Mode) and the like can be set.

  The initial traverse width set by the setting device 51 is the traverse when the winding speed reaches the set winding speed at the beginning of winding the yarn 20 around the empty winding bobbin 22 (the steady winding section described later). It means width. The traverse control unit 46 determines the traverse width (target traverse width) when winding the yarn at the set winding speed as follows based on the initial traverse width.

  That is, the automatic winder according to the present embodiment is configured so that a so-called taper winding package can be formed in addition to the package 30 having a constant winding width as shown in FIG. When forming a package with a constant winding width, the traverse control unit 46 determines the target traverse width to be always equal to the initial traverse width regardless of the package diameter. On the other hand, when forming a taper winding package, the traverse control unit 46 gradually sets the target traverse width from the initial traverse width as the package becomes thicker, based on parameters such as a taper angle set by the setting device 51. Decide to reduce.

  Note that the setting by the setting unit 51 can be set for each winder unit 10 or a plurality of winder units 10 can be collectively set.

  Further, the unit controller 50 is connected to the tension applying device 13 and appropriately controls the additional tension applied to the yarn 20, thereby suppressing fluctuations in the yarn winding tension described later.

  Next, the control of the winding acceleration unit 62 and the traverse width shortening unit 63 in the acceleration winding section will be described with reference to FIG. FIG. 2 is a graph showing the traverse width control in the two control modes in association with the winding speed of the winding bobbin.

  First, control by the winding acceleration unit 62 will be described. In the winder unit 10, when an empty winding bobbin 22 is appropriately set in the cradle 23, winding of the yarn is started. Further, when the yarn breakage at the time of unwinding or the yarn cutting by the cutter 39 occurs and the yarn splicing by the splicer device 14 is completed, the winding of the yarn is started (resumed).

  At this time, the unit control unit 50 sends a signal to the package drive control unit 42, and the package drive control unit 42 that has received the signal controls the package drive motor 41 to gradually accelerate. This acceleration control is performed until the winding speed reaches the set winding speed. FIG. 2A is a graph showing a change in winding speed with respect to time from the start of winding. As shown in FIG. 2A, when the winding speed reaches the set winding speed, the unit controller 50 sends a signal to the package drive controller 42, and the package drive controller 42 that has received the signal The package drive motor 41 is controlled so that the acceleration of the speed ends and the set winding speed becomes constant.

  In the following description, a time interval from the start of rotation until reaching the set winding speed is referred to as an acceleration winding interval, and a time interval after reaching the set winding speed is a steady winding interval. Called.

  Next, control by the traverse width shortening unit 63 will be described. That is, since the winding speed changes from zero to the set winding speed in the acceleration winding section, fluctuations in the running tension of the yarn occur. Even if the yarn 20 is wound with a normal traverse width (that is, the above-mentioned target traverse width), the traverse device 27 exceeds the normal traverse width due to a control response delay of the traverse device 27 and traverses. May occur.

  In order to avoid this, in the present embodiment, the traverse control unit 46 includes a traverse width shortening unit 63. The traverse width shortening unit 63 shortens the traverse width in the accelerated winding section, and traverses the drive motor so as to traverse the yarn 20 with a reduced traverse width narrower than the traverse width in the steady winding section (the target traverse width). 45 is controlled.

  And the traverse width shortening part 63 of this embodiment is comprised so that the traverse width in an acceleration winding area can be controlled by switching two different control modes. For this purpose, the traverse width shortening unit 63 includes a reduced width holding unit 70 and a reduced width changing unit (twill amplitude changing unit) 71.

  Among the two control modes, in the constant reduced width mode as the first control mode, the traverse width is constant at a traverse width (reduced traverse width) narrower than the target traverse width based on the initial traverse width set by the setting device 51. It is controlled by the reduced width holding unit 70 so that

  On the other hand, in the reduced width change mode as the second control mode, the traverse width is set to a traverse width narrower than the target traverse width (reduced traverse width) at the start of winding, and this traverse width increases the winding speed. Accordingly, the reduction width changing unit 71 controls so as to gradually approach the target traverse width.

  It should be noted that the control mode in which the traverse width is controlled among the control modes shown above can be selected by the operator operating the setting device 51 as the control mode switching unit.

  With reference to FIG. 2B, the control in the constant reduction width mode (control by the reduction width holding unit 70) will be described in detail. This constant reduction width mode is a mode in which the yarn is traversed so as to maintain a constant reduction traverse width that is narrower than the traverse width in the steady winding section.

  FIG. 2B is a graph showing changes in the traverse width in the constant reduction width mode, and the horizontal axis represents the time from the start of winding. The vertical axis of the graph is the traverse width. In this graph, the traverse width is expressed as a ratio (hereinafter referred to as a traverse rate) to the traverse width (target traverse width) in the steady winding section. As shown in FIG. 2B, in the constant reduction width mode, the traverse rate at the start of rotation of the package drive motor 41 is a predetermined value of less than 100%, and this traverse rate is constant until the end of the acceleration winding section. Maintained. Then, at the moment of transition from the acceleration winding section to the steady winding section, the traverse rate changes to 100%.

  Next, the control in the reduction width change mode (control by the reduction width change unit 71) will be described with reference to FIG. This reduction width change mode is a mode in which the yarn is traversed so that the traverse width gradually increases from the start to the end of the acceleration winding section.

  FIG. 2C is a graph showing the change in the traverse width in the reduction width change mode, as in FIG. As shown in FIG. 2C, in the reduction width change mode, the traverse rate is a predetermined value of less than 100% at the start of rotation of the package drive motor 41, but with the acceleration of the winding speed. The traverse rate increases linearly so as to approach 100%. Then, when the winding speed reaches the set winding speed (at the end of the acceleration winding section), the traverse rate is controlled so as to reach 100%.

  In the automatic winder of this embodiment, the traversing width at the start of the acceleration winding section can be set by the setting device 51 for each of the constant reduction width mode and the reduction width change mode. Although various setting methods can be considered, the present embodiment is configured such that the traverse rate at the start of winding (start traverse rate) can be set in percentage units.

  As described above, in the reduced width changing mode, the traverse width is configured to linearly increase with the winding speed. In order to realize this, the reduction width changing unit 71 creates a predetermined conversion formula based on the set winding speed and the start traverse rate set by the setting device 51 described above, and the current winding is added to this conversion formula. The current traverse rate is obtained by substituting the taking speed. Then, the traverse control unit 46 controls the traverse drive motor 45 so that the yarn is traversed according to the traverse width obtained by multiplying the traverse width in the steady winding section (the target traverse width) by the traverse rate. .

  With this configuration, the operator operates the setting device 51 to set the set winding speed, the initial traverse width, and the like according to the yarn type. At this time, the setting of the start traverse rate and the traverse control in which of the two control modes described above is performed.

  The starting traverse rate is preferably set to about 80% to 90%. This is because if the starting traverse rate is too small, the shape of the end face of the package 30 may be collapsed.

  Next, control of the traverse width in the winder unit 10 will be described with reference to FIG. FIG. 3 is a flowchart for explaining control of the traverse width.

  Before starting the operation of the automatic winder, the operator operates the setting device 51 to set various operating conditions (including the set winding speed, traverse width, etc.) according to the yarn type and the like. At this time, the setting of the start traverse rate and the control of the traverse width according to which of the two control modes described above is performed.

  Thereafter, when the flow of FIG. 3 is started by an appropriate operation start operation by the operator, the traverse control unit 46 checks which one of the constant reduction width mode and the reduction width change mode is selected (S101). ).

  If it is determined in S101 that the constant reduction width mode is selected, the traverse control unit 46 traverses the yarn with a constant traverse width, and the winding acceleration unit 62 sets the winding speed. Accelerate to speed (S102). The traverse width (reduced traverse width) at this time is obtained by multiplying the traverse width (target traverse width) in the steady winding section by the start traverse rate set by the setting device 51.

  On the other hand, when it is determined in S101 that the reduction width change mode is selected, the traverse reduction width change control by the traverse control unit 46 and the winding acceleration control by the package drive control unit 42 are performed in parallel. (S103). Specifically, the reduction width changing unit 71 of the traverse control unit 46 performs traverse with a predetermined traverse width at the start of winding, and performs control to gradually increase the traverse width according to acceleration of the winding speed. . Further, the winding acceleration unit 62 of the package drive control unit 42 accelerates the winding speed to the set winding speed. The traverse width at the start of winding (reduced traverse width) is calculated in the same manner as the reduced traverse width in S102.

  Next, it is checked whether or not the acceleration of the winding bobbin 22 has been completed (that is, whether or not the winding speed has reached the set winding speed) (S104). If the acceleration has not been completed, the process returns to S101 to continue the winding acceleration. The above-described acceleration winding section control is realized by the loop of S101 to S104.

  If it is determined in S104 that the acceleration of the winding speed has been completed, the unit controller 50 cancels the reduction of the traverse width (S105). Then, the yarn is wound at the set winding speed while traversing with the target traverse width (traverse rate 100%) (S106).

  Next, the unit controller 50 checks whether a yarn break or a yarn cut has occurred based on the signal from the clearer 15 (S107). When the signal indicating that the yarn breakage or the yarn cut has occurred is received from the clearer 15, the unit controller 50 immediately stops the winding of the package 30 (S108), and the yarn on the package 30 side and the yarn feeding bobbin 21 The yarn on the side is guided to the splicer device 14 to perform the yarn joining operation (S109). When the yarn splicing operation is completed, the process returns to the processing of S101, traversing the yarn while shortening the traverse width according to the designated control mode, and the winding speed is again accelerated to the set winding speed.

  When it is determined in S107 that no yarn breakage or yarn cut has occurred, the unit controller 50 checks whether or not the operation of stopping the winder unit 10 is being performed (S110). When the operation stop operation of the winder unit 10 is detected, the operation of the winder unit 10 is stopped (S111), and the flow ends. When the operation stop operation is not detected, the process returns to S106 and the winding at the steady speed is continued. The control of the above-described steady winding section is realized by the loop of S106, S107, and S110.

  As described above, the automatic winder according to the present embodiment is configured to wind the yarn 20 around the winding bobbin 22 to form the package 30. The winder unit 10 included in the automatic winder includes a package drive motor 41, a package drive control unit 42, a traverse guide 11, a traverse drive motor 45, and a traverse width shortening unit 63 included in the traverse control unit 46. And a container 51. The package drive motor 41 rotates the winding bobbin 22. The package drive control unit 42 controls the rotational speed of the package drive motor 41 and controls the yarn winding speed. The traverse guide 11 traverses the yarn wound around the winding bobbin 22. The traverse drive motor 45 reciprocates the traverse guide 11. The traverse control unit 46 controls the traverse width of the traverse guide 11. The setting device 51 is configured to set the traverse width of the traverse guide 11 (the initial traverse width). The traverse width shortening unit 63 is a constant reduced width mode as a control mode for controlling the traverse width until the winding speed of the winding bobbin 22 reaches the set winding speed (acceleration winding section). And a reduction width change mode. In the constant reduction width mode, the traverse width shortening unit 63 controls the traverse drive motor 45 to perform traverse with a constant reduction traverse width that is narrower than the target traverse width based on the initial traverse width set by the setting unit 51. Control. In the reduction width change mode, the traverse width shortening unit 63 continuously increases as the winding speed increases from the reduced traverse width that is smaller than the target traverse width based on the initial traverse width set by the setting unit 51. The traverse drive motor 45 is controlled so as to traverse with the width.

  With this configuration, traversing is performed in the accelerated winding section with a traverse width narrower than that in the steady winding section, so that it is possible to prevent traversing due to yarn tension fluctuations and the like. Further, since the traverse width control mode in the acceleration winding section can be selected from two control modes, it is possible to flexibly cope with the winding method of the package 30 and the like. For example, when generating a package of aligned winding such as precision winding, the aligned winding can be appropriately performed by selecting the constant reduction width mode. On the other hand, in the case of step precision winding that jumps at the number of dangerous winds during winding, it is possible to effectively prevent the occurrence of package defects such as annual rings and traversing by selecting the reduction width change mode. it can. When the reduction width change mode is selected, the traverse width continuously increases from the reduced state in accordance with the winding speed, so that a step is generated on the surface between the center portion and the end portion of the package 30. Can be prevented. Accordingly, it is possible to prevent the generation of annual rings and to prevent the winding position from becoming unstable due to the step of the package 30 and causing the traversing. Further, even when the ear height is generated at the axial end portion of the package 30 during winding, the traverse width is expanded as acceleration progresses in the acceleration winding section, and the ear height portion is eventually expanded. The thread is traversed to cover it. Accordingly, it is possible to avoid the same portion of the yarn from repeatedly contacting the contact roller 29 many times on the surface of the yarn layer surface at the top portion of the ear, so that occurrence of yarn breakage due to damage to the surface of the yarn layer can be prevented.

  In addition, the automatic winder of the present embodiment is configured to wind the yarn around the winding bobbin 22 by the following method. That is, in the first step, a control mode for reducing the traverse width until the winding speed of the winding bobbin 22 reaches a predetermined winding speed from the normal traverse width (target traverse width) is a constant reduction width. Select from mode and reduction width change mode. In the second step, when the constant reduction width mode is selected in the first step, the yarn is wound while traversing with a constant reduction traverse width narrower than the steady traverse width, and in the first step. When the reduction width change mode is selected, the yarn is wound while traversing at a traverse width that continuously increases as the winding speed increases from a reduced traverse width that is narrower than the traverse width at the normal time.

  By this method, traversing is performed with a reduced traverse width, so that traversing can be prevented even when driving of the winding bobbin 22 with unstable tension is started. In addition, by selecting an appropriate mode according to the winding method of the package 30 in the first step, the yarn can be wound in the second step while exhibiting the effects of the respective control modes as described above. As described above, it is possible to provide a high-quality package 30 that prevents occurrence of twill and annual rings, and has little accumulation of damage to the yarn even when an ear height occurs during winding.

  In the automatic winder of this embodiment, the traverse width shortening unit 63 includes a reduction width changing unit 71, and the reduction width changing unit 71 has a winding speed of the winding bobbin 22 that reaches a predetermined winding speed. Until the traverse drive is performed so that the traverse is continuously increased from the reduced traverse width narrower than the target traverse width based on the initial traverse width set by the setting device 51 with the traverse width continuously increasing as the winding speed increases. The motor 45 is controlled.

  As a result, traversing is performed in the accelerated winding section with a traverse width narrower than that in the steady winding section, so that it is possible to prevent traversing due to yarn tension fluctuations and the like. In addition, since the traverse width continuously increases from the reduced state according to the winding speed, it is possible to prevent a step from being generated on the surface between the center portion and the end portion of the package 30. Accordingly, it is possible to prevent the generation of annual rings and to prevent the winding position from becoming unstable due to the step of the package 30 and causing the traversing. Further, even when the ear height is generated at the axial end portion of the package 30 during winding, the traverse width is expanded as acceleration progresses in the acceleration winding section, and the ear height portion is eventually expanded. The thread is traversed to cover it. Accordingly, it is possible to avoid the same portion of the yarn from repeatedly contacting the contact roller 29 many times on the surface of the yarn layer surface at the top portion of the ear, so that occurrence of yarn breakage due to damage to the surface of the yarn layer can be prevented.

  Next, a modification of the automatic winder will be described with reference to FIG. In addition, in a modification, the same code | symbol is attached | subjected to drawing and the description is abbreviate | omitted to the same and similar structure as the said embodiment.

  As shown in FIG. 4, in the modified automatic winder, the unit control unit 90 includes a winding acceleration unit 62 and a traverse width shortening unit 63. In this modification, the unit control unit 90 transmits a winding acceleration command and a traverse width shortening command to the package drive control unit 42 and the traverse control unit 46 to control the package drive motor 41 and the traverse drive motor 45. ing. In the automatic winder of this modified example, the unit controller 90 functions as a winding drive controller and a traverse amplitude controller.

  Although the preferred embodiment of the present invention has been described above, the above configuration can be further modified as follows.

  In the reduced width change mode of the above embodiment, the traverse width (traverse rate) is controlled to linearly increase in accordance with the acceleration of the winding speed, but the present invention is not limited to this configuration, and according to the winding speed. Any traverse width may be controlled as long as it is continuously increased and gradually approaches the target traverse width. For example, the control can be changed to increase the traverse width (traverse rate) so as to draw a curve according to an appropriate function.

  Moreover, in the said embodiment, although it is the structure which performs traverse using the arm member 28, it can replace with this and can be changed into the structure which uses a belt-type traverse apparatus, for example.

  In the above embodiment, the direct drive system is adopted for the rotational drive of the take-up bobbin 22, but instead of this configuration, a drive unit is connected to the contact roller 29, and the package 30 ( The take-up bobbin 22) may be driven to rotate.

  In the above embodiment, the traverse drive motor 45 is a servo motor, but can be changed to a configuration using a voice coil motor or a step motor instead.

  In addition to the two control modes described above, a control mode in which the traverse width shortening control by the traverse width shortening unit 63 is not performed in the acceleration winding section by operating the setting device 51 (non-reduction mode, third control mode). It is possible to change to a configuration that can also be set.

  In the above embodiment, the control mode is manually selected by the operator. For example, when the winder unit 10 is operated, the reduction width change mode is automatically selected unless a special operation is performed. Can be configured. In addition, the reduced width holding unit 70 in FIG. 1 can be omitted, and the traverse width can be always controlled in the reduced width change mode.

  In the above embodiment, the operator operates the setting device 51 to input the start traverse rate. Instead of this configuration, the setting device 51 stores the start traverse rate in advance. It can also be set as the structure which traverses with the said start traverse rate. Alternatively, a plurality of start traverse rates may be stored, and control may be performed with the start traverse rate selected by the operator using the setting device 51 from among the start traverse rates.

  Further, in the above embodiment, the control for reducing the traverse width from the normal (hereinafter referred to as the reduction width mode) is controlled to end simultaneously with the end of the acceleration winding section. However, the end timing of the reduced width mode can be changed to be slightly before or after the end timing of the acceleration winding section. However, from the viewpoint of surely preventing the falling, it is preferable to end the reduction width mode simultaneously with the end of the acceleration winding section as in the above embodiment.

The schematic front view and block diagram of the automatic winder which concern on one Embodiment of this invention. The graph which shows control of the traverse width in two control modes corresponding to the winding speed of a winding bobbin. The flowchart explaining the traverse control of an automatic winder. The model front view and block diagram of the automatic winder of a modification.

Explanation of symbols

10 Winder unit 11 Traverse guide
22 Winding bobbin 41 Package drive motor (winding drive)
42 Package drive controller (winding drive controller)
45 Traverse drive motor (traverse guide drive)
46 Traverse control unit 51 Setter (setting unit)
63 Traverse width shortening part (Twill amplitude control part)
71 Reduction width change part (twill amplitude change part)

Claims (4)

In a yarn winding machine that winds a yarn around a winding bobbin to form a package,
A winding drive unit for rotationally driving the winding bobbin;
A winding drive control unit for controlling the rotational speed of the winding drive unit and controlling the winding speed of the yarn;
A traverse guide for traversing the yarn wound around the winding bobbin;
A traverse guide driving unit for reciprocating the traverse guide;
A traverse amplitude controller for controlling the traverse amplitude of the traverse guide,
A setting unit capable of setting a traverse amplitude of the traverse guide,
With
The traverse amplitude controller is a control mode for controlling the traverse amplitude until the winding speed of the winding bobbin reaches a predetermined winding speed.
A first control mode for controlling the traverse guide driving unit to traverse at a constant reduced traverse amplitude that is narrower than a target traverse amplitude based on the set traverse amplitude set by the setting unit;
The traverse guide driving unit is controlled to traverse at a traverse amplitude that continuously increases as the winding speed increases from a reduced traverse amplitude that is narrower than a target traverse amplitude set based on the set traverse amplitude set by the setting portion. And a second control mode. In a yarn winding method for winding a yarn around a winding bobbin to form a package,
A first step of selecting a control mode for shortening the traverse amplitude until the winding speed of the winding bobbin reaches a predetermined winding speed from the normal traverse amplitude from the first control mode and the second control mode. When,
When the first control mode is selected in the first step, the yarn is wound while traversing at a constant reduced traverse amplitude narrower than the normal traverse amplitude, and the second control is performed in the first step. When the mode is selected, a second step of winding the yarn while traversing at a traverse amplitude that continuously increases as the winding speed increases from a reduced traverse amplitude smaller than the normal traverse amplitude;
A yarn winding method comprising:   A package formed by the yarn winding method according to claim 2. In a yarn winding machine that winds a yarn around a winding bobbin to form a package,
A winding drive unit for rotationally driving the winding bobbin;
A winding drive control unit for controlling the rotational speed of the winding drive unit and controlling the winding speed of the yarn;
A traverse guide for traversing the yarn wound around the winding bobbin;
A traverse guide driving unit for reciprocating the traverse guide;
A traverse amplitude controller for controlling the traverse amplitude of the traverse guide,
A setting unit capable of setting a traverse amplitude of the traverse guide,
With
The twill amplitude control unit includes a twill amplitude changing unit,
The traverse amplitude changing unit starts winding from a reduced traverse amplitude smaller than a target traverse amplitude based on the set traverse amplitude set by the setting unit until the winding speed of the winding bobbin reaches a predetermined winding speed. The yarn winding machine, wherein the traverse guide driving unit is controlled to traverse at a traverse amplitude that continuously increases as the take-up speed increases.

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