JP2016078995A - Yarn winder and package deceleration method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn winder equipped with a yarn storage device which has such a configuration that slide of a packager can be prevented and the package can be decelerated in a short time.SOLUTION: An automatic winder (yarn winder) is equipped with a yarn storage device, a package rotation sensor, a traversing drum, and a control part. The yarn storage device winds up and temporarily stores a yarn from a yarn feeding bobbin. The package rotation sensor detects the rotation of the package. The traversing drum contacts a package and is rotated thereby rotating the package. The control part performs a deceleration control for decelerating the traversing drum while performing such an adjustment that a speed difference between circumferential speeds of the package and a winding part becomes a predetermined value or less in the state that a yarn is connected between the yarn storage device and the winding part and the state that the package and the traversing drum contact each other, on the basis of a result detected by the package rotation sensor and a rotational speed of the traversing drum.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a control performed when a package is decelerated in a yarn winding device including a yarn storage device.

  2. Description of the Related Art Conventionally, a yarn winding device that forms a package by winding yarn from the yarn storage device while temporarily storing the yarn unwound from the yarn supply bobbin in the yarn storage device is known. The yarn winding device including the yarn accumulating device can continue the formation of the package even during the piecing. Patent document 1 discloses this kind of yarn winding device.

  Patent Document 1 discloses a yarn winding device configured to rotate a package by rotating a winding drum (contact roller) in contact with the package. The yarn winding device performs control to change the rotation speed of the winding drum based on the storage amount of the yarn storage device. Specifically, the yarn winding device reduces the rotation speed of the winding drum or stops the rotation of the package by decreasing the rotation speed of the winding drum when the storage amount of the yarn storage device becomes a predetermined amount or less. This control is performed to prevent the yarn stored in the yarn storage device from disappearing.

  In Patent Document 2, as in Patent Document 1, a yarn winding device that rotates a package by rotating a yarn guide drum (contact roller) that is in contact with the package is disclosed. This yarn winding device performs control to cause slippage between the yarn guide drum and the package when the rotational speed of the package is reduced. This control is performed in order to prevent ribbon winding (the yarn newly wound on the package is overlapped with the yarn already wound).

International Publication No. 2012/127939 JP-A-7-187506

  Here, in the yarn winding device including the yarn accumulating device as in Patent Document 1, when the rotation speed of the contact roller is rapidly reduced, a large slip occurs between the contact roller and the package. When a large slip occurs, the yarn may not be traversed as the traversing device operates, and the yarn may fall from the end face of the package (trailing). In addition, when the package is rotated at high speed or when the package is heavy, the inertial force of the rotating package is increased, so that a large slip is likely to occur.

  On the other hand, if the rotational speed of the contact roller is gently reduced, a large amount of yarn is unwound from the yarn storage device before the package rotational speed reaches the target speed, and the storage amount of the yarn storage device is greatly reduced. To do. Therefore, when the rotational speed of the contact roller is gradually reduced, the package needs to be frequently stopped in order to secure the storage amount of the yarn storage device. However, if the package is frequently stopped, not only the winding efficiency is lowered, but also when the package is stopped, the yarn falls from the end surface of the package and winds around the winding bobbin, which may cause yarn breakage. . Therefore, it is not preferable to gently decrease the rotation speed of the contact roller without countering the inertia.

  Note that the yarn winding device of Patent Document 2 is configured to intentionally generate a slippage of the package. Moreover, in patent document 2, the structure provided with a thread | yarn storage apparatus is not disclosed.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a yarn winding device including a yarn accumulating device that can reduce the speed of the package in a short time while suppressing slippage of the package. There is.

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 a first aspect of the present invention, a yarn winding device having the following configuration is provided. That is, the yarn winding device includes a yarn supplying unit, a yarn accumulating device, a package forming unit, and a control unit. The yarn supplying section can supply yarn. The yarn accumulating device winds a yarn from the yarn supplying unit and temporarily stores the yarn. The package forming unit forms a package by drawing a yarn from the yarn accumulating device and winding the yarn on a winding bobbin. The control unit controls the package forming unit. The package forming unit includes a package support unit, a package rotation detection unit, a contact roller, and a roller drive source. The package support part rotatably supports the package. The package rotation detection unit detects the rotation amount of the package. The contact roller rotates in contact with the package supported by the package support portion to rotate the package. The roller driving source rotationally drives the contact roller. The control unit is configured such that a yarn is connected between the yarn storage device and the package forming unit based on a detection result of the package rotation detection unit and a rotation speed of the contact roller, and the package and the package While the contact roller is in contact with the contact roller, deceleration control is performed to decelerate the contact roller while adjusting the peripheral speed difference between the package and the contact roller to be a predetermined value or less.

  Thereby, the slip which generate | occur | produces between a contact roller and a package can be suppressed, without decelerating a contact roller gently. Therefore, it is possible to increase the storage amount of the yarn storage device while preventing the occurrence of traversing.

  In the yarn winding device, the control unit performs the deceleration control in a state where the yarn is coupled between the yarn storage device and the package forming unit and the contact roller and the package are in contact with each other. It is preferable to stop the contact roller.

  Thereby, even when the package is stopped, it is possible to prevent slippage (and thus occurrence of falling) between the contact roller and the package.

  In the yarn winding device, it is preferable that the control unit resumes winding the yarn around the package supported by the package support unit after stopping the contact roller.

  As a result, the occurrence of crossing can be prevented by stopping the package by the deceleration control of the present invention, so that the winding of the package can be resumed without causing a quality problem.

  In the yarn winding device, the control unit preferably performs the deceleration control when the yarn stored in the yarn storage device becomes less than a predetermined value.

  Thereby, even when recovering the reduced storage amount, the slip generated between the contact roller and the package can be suppressed.

  In the yarn winding device, the control unit includes the package and the contact roller based on a rotation speed of the contact roller and a detection result of the package rotation detection unit in a predetermined period before the start of the deceleration control. It is preferable to calculate a reference value of the difference between the peripheral speeds and perform the deceleration control using the reference value.

  That is, since the diameter of the package changes according to the amount of winding, the amount of slip cannot be accurately grasped only by the rotational speed of the package and the rotational speed of the contact roller. In this regard, the slip amount during the deceleration control can be easily estimated by using the rotation speed of the package and the contact roller before the deceleration control (before the slip occurs).

  The yarn winding device preferably has the following configuration. That is, the yarn winding device includes a package yarn amount detection unit that detects the amount of yarn wound on the package. The control unit determines a set value for the deceleration control in consideration of a detection result of the package yarn amount detection unit.

  As a result, the diameter and weight of the package can be calculated based on the amount of yarn wound on the package, so that the set value (initial value or control parameter, etc.) can be determined in consideration of the magnitude of the inertia force of the package. . Therefore, the slip which generate | occur | produces between a contact roller and a package can be suppressed more reliably.

  The yarn winding device preferably has the following configuration. That is, a package brake that brakes the package in contact with the winding bobbin or the package is provided. The controller operates the package brake based on the deceleration of the contact roller to decelerate the package.

  As a result, the rotational speed of the package can be forcibly reduced, so that the rotational speed of the package can be brought close to a desired value in a short time.

  In the yarn winding device, the yarn supplying unit is a yarn supplying bobbin supporting unit on which a yarn supplying bobbin wound with a yarn spun by a spinning machine is supported, and the contact roller is wound on the package. It is preferable that the traverse drum is provided with traverse grooves for traversing the yarn to be produced.

  Thereby, if a large slip occurs between the traverse drum and the package, the surface of the package may be damaged, but the damage can be prevented by performing the deceleration control of the present invention.

  The yarn winding device preferably has the following configuration. That is, the yarn winding device includes a yarn joining device that is arranged between the yarn supplying unit and the yarn accumulating device and that joins the separated yarn when the yarn is divided. The controller executes the deceleration control when it is detected that the yarn joining by the yarn joining device is impossible.

  When yarn splicing is impossible, the yarn in the yarn accumulator may run out in the near future, so by performing deceleration control as described above, slippage generated between the contact roller and the package is suppressed. The storage amount of the yarn storage device can be increased.

  According to the second aspect of the present invention, the following package deceleration method is provided. That is, the package deceleration method includes a package rotation detection step and a deceleration step. In the package rotation detection step, the package forming unit detects the rotation amount of the package formed by winding the yarn around the winding bobbin. In the deceleration step, the yarn is wound from the yarn supply unit based on the detection result of the package rotation detection step and the rotation speed of the contact roller that rotates by contacting the package and rotating the package. In a state where the yarn is coupled between the yarn storage device that temporarily stores and the package forming unit and the package and the contact roller are in contact with each other, a difference in the peripheral speed between the package and the contact roller is The contact roller is decelerated while adjusting to be equal to or less than a predetermined value.

  Thereby, the package can be decelerated while suppressing slippage generated between the contact roller and the package without slowly decelerating the contact roller. Therefore, it is possible to increase the storage amount of the yarn storage device while preventing the occurrence of traversing.

The typical side view of the winder unit with which the automatic winder concerning one embodiment of the present invention is provided. The front view which shows the structure of the vicinity of a winding part. The flowchart which shows the process which controls rotation of a traverse drum based on the storage amount of a yarn storage apparatus. The flowchart which shows the process immediately after starting the preliminary process of deceleration control, and deceleration control. The flowchart which shows the process performed after starting deceleration control. The graph which shows an example of the time change of the peripheral speed of a package and a traverse drum at the time of performing deceleration control.

  Next, an embodiment of the present invention will be described. First, an outline of an automatic winder (yarn winding device) will be described with reference to FIGS. 1 and 2. The automatic winder has a configuration in which a large number of winder units 2 are arranged side by side. The automatic winder also includes a machine base management device (not shown) for centrally managing the winder unit 2 and a blower box (not shown) provided with a compressed air source and a negative pressure source.

  As shown in FIG. 1, the winder unit 2 mainly includes a control unit 50, a yarn feeding bobbin support unit (yarn feeding unit) 7, and a winding unit (package forming unit) 8. The winder unit 2 is configured to unwind the yarn (spun yarn) 20 of the yarn feeding bobbin 21 supported by the yarn feeding bobbin support portion 7 and to wind it around the package 30. In the following description, the upstream side and the downstream side when viewed in the traveling direction of the yarn are simply referred to as “upstream side”, “downstream side”, and the like.

  The control unit 50 includes hardware such as a CPU, ROM, and RAM (not shown) and software such as a control program stored in the ROM. The hardware and software cooperate to control each part of the winder unit 2. Moreover, the control part 50 with which each winder unit 2 is provided can communicate with the above-mentioned machine stand management apparatus. As a result, the operations of the plurality of winder units 2 provided in the automatic winder can be centrally managed in the machine management device.

  The yarn supplying bobbin support portion 7 holds the yarn supplying bobbin 21 in a substantially upright state. Further, the yarn supplying bobbin support portion 7 can discharge the empty yarn supplying bobbin 21. A magazine-type bobbin supply device 26 is disposed on the front side of the winder unit 2. The bobbin supply device 26 includes a rotary magazine can 27. The magazine can 27 can hold a plurality of spare yarn feeding bobbins 21. The bobbin supply device 26 can supply a new yarn supplying bobbin 21 to the yarn supplying bobbin support 7 by intermittently rotating the magazine can 27.

  The winding unit 8 includes a cradle 23 configured to be capable of mounting the winding bobbin 22, and a traverse drum (contact roller) 24 for traversing the yarn 20 and driving the winding bobbin 22. .

  As shown in FIG. 2, the cradle 23 is a pair of left and right pivotable about a pivot shaft 43 provided parallel to the rotational axis of the traverse drum 24 and spaced apart from the traverse drum 24. The arm is equipped. As the cradle 23 rotates, an increase in the yarn layer diameter of the package 30 accompanying the winding of the yarn 20 can be absorbed.

  A rotation angle sensor (package yarn amount detection unit) 46 for detecting the rotation angle of the cradle 23 is attached to the rotation shaft 43. The rotation angle sensor 46 is composed of, for example, a rotary encoder, and outputs the rotation angle of the cradle 23 to the control unit 50. The control unit 50 can calculate the package diameter of the package 30 based on the rotation angle of the cradle 23 acquired from the rotation angle sensor 46.

  In addition, rotation holders (package support portions) 44 and 45 are rotatably attached to the tips of the arms of the cradle 23. The rotary holders 44 and 45 are arranged so as to face each other. The winding bobbin 22 is attached so as to be sandwiched between the two rotating holders 44 and 45.

  A package brake 80 for braking the rotation of the package 30 is provided in the vicinity of the rotation holder 44. The package brake 80 includes a piston housing 81 and a brake piston 82.

  The piston housing 81 is built in the tip of the cradle 23, and the brake piston 82 is fitted in the piston housing 81 in an airtight manner. The brake piston 82 is slidable with respect to the piston housing 81 and is slidable with respect to the shaft 44 a that rotates together with the rotation holder 44.

  The piston housing 81 can switch between supply and stop of compressed air to the internal space of the piston housing 81 by adjusting a solenoid valve (not shown) under the control of the control unit 50. With this configuration, the rotation holder 44 can freely rotate with respect to the brake piston 82 in a state where compressed air is not supplied into the piston housing 81.

  On the other hand, when compressed air is supplied into the piston housing 81, the advancing brake piston 82 moves to generate a frictional resistance against the rotation of the rotary holder 44. Thereby, rotation of winding bobbin 22 (package 30) can be braked. The package brake is not limited to the pneumatic configuration described above, and may be configured to brake the rotation of the rotary holder 44 by hydraulic pressure or electromagnetic force.

  A package rotation sensor (package rotation detection unit) 47 is attached to the tip of the cradle 23 on the opposite side. The package rotation sensor 47 detects the amount of rotation of the take-up bobbin 22 (package 30) attached to the cradle 23. The package rotation sensor 47 outputs a pulse signal to the control unit 50 every time the package 30 rotates by a predetermined angle. The control unit 50 can calculate the rotational speed of the package 30 by measuring the number of pulses per time.

  The traverse drum 24 is disposed to face the winding bobbin 22. The traverse drum 24 is rotationally driven by a traverse drum drive motor (roller drive source) 41 shown in FIG. The traverse drum drive motor 41 is controlled by the control unit 50 in the presence / absence of rotation and the rotation speed. By rotating the traverse drum 24, the winding bobbin 22 and the package 30 are driven to rotate. Thereby, the yarn 20 stored in the yarn storage device 19 described later can be wound around the package 30.

  Further, a traverse groove 24a shown in FIG. 2 is formed on the outer peripheral surface of the traverse drum 24, and the yarn 20 can be traversed with a predetermined width by the traverse groove 24a. With the above configuration, the package 30 having a predetermined shape can be formed by winding the yarn 20 around the winding bobbin 22 while traversing.

  A traverse drum rotation sensor 42 is attached to the traverse drum 24. The traverse drum rotation sensor 42 is configured as a rotary encoder, for example, and outputs a pulse signal to the controller 50 every time the traverse drum 24 rotates by a predetermined angle. The controller 50 can calculate the rotational speed of the traverse drum 24 by measuring the number of pulses per time.

  The winder unit 2 includes an unwinding assisting device 10 and an unwinding assisting device 10 in order from the yarn feeding bobbin support 7 side to the winding unit 8 side in the yarn traveling path between the yarn feeding bobbin support 7 and the winding unit 8. The lower thread blowing section 11, the gate type tensioner 12, the upper thread catching section 13, the yarn joining apparatus 14, the yarn trap 15, the cutter 16, the thread monitoring apparatus 17, the upper thread drawing section 18, A yarn storage device 19 is arranged.

  The unwinding assisting device 10 brings the movable member 10a into contact with the balloon formed on the upper portion of the yarn supplying bobbin 21 by the yarn 20 unwound from the yarn supplying bobbin 21 being swung around. Thereby, the size of the balloon is appropriately controlled to assist the unwinding of the yarn 20.

  The lower thread blow-up unit 11 is an air soccer device disposed between the yarn supplying bobbin support 7 and the yarn joining device 14, and when replacing the yarn supplying bobbin 21, It sends out toward the yarn joining device 14 side.

  The gate type tensioner 12 applies a predetermined tension to the traveling yarn 20. The gate type tensioner 12 of this embodiment is a gate type in which movable comb teeth are arranged with respect to fixed comb teeth. The movable comb teeth can be rotated by a rotary solenoid so that the comb teeth are engaged or released. Instead of the tension applying device of the gate type tensioner 12, for example, a disk type tension applying device may be arranged.

  The upper yarn catching portion 13 is disposed between the yarn joining device 14 and the yarn feeding bobbin support portion 7. The upper thread catcher 13 is connected to a negative pressure source (not shown) and can generate a suction air flow at the time of yarn joining.

  The yarn trap 15 is disposed between the yarn joining device 14 and the yarn accumulating device 19. The tip of the yarn trap 15 is formed as a cylindrical member and is provided close to the traveling path of the yarn 20. The yarn trap 15 is connected to a negative pressure source (not shown). By generating a suction air flow at the tip, dust such as fluff adhering to the traveling yarn 20 can be sucked and removed.

  The yarn monitoring device 17 is configured to detect a yarn defect such as a slab by monitoring the thickness of the yarn 20. When the yarn monitoring device 17 detects a yarn defect, the yarn monitoring device 17 outputs a signal for instructing cutting and removing the yarn defect to the cutter 16. The cutter 16 is disposed in the vicinity of the yarn monitoring device 17 in order to immediately cut the yarn 20 in response to a signal.

  The yarn joining device 14 detects the yarn defect when the yarn monitoring device 17 detects a yarn defect, cuts the yarn 20 with the cutter 16, the yarn 20 unwound from the yarn feeding bobbin 21, or the yarn feeding bobbin 21. At the time of replacement or the like, the lower thread on the yarn supplying bobbin 21 and the upper thread on the yarn accumulating device 19 side, which have been separated, are spliced. As the yarn joining device 14, a device using a fluid such as compressed air or a mechanical device can be used.

  The upper thread drawing portion 18 is an air soccer device disposed immediately upstream of the yarn accumulating device 19, and can send out the upper yarn on the yarn accumulating device 19 side toward the yarn guide pipe 36 by compressed air.

  When performing yarn splicing, the upper yarn on the yarn storage device 19 side is sent to the yarn guide pipe 36 by the upper yarn pull-out portion 18 as described above. The yarn guide pipe 36 discharges the fed upper yarn from the lower end. The yarn discharged from the yarn guide pipe 36 is sucked by the upper yarn catcher 13. When the upper yarn catcher 13 sucks the upper yarn, the upper yarn is taken out from a slit (not shown) formed in the yarn guide pipe 36 along the longitudinal direction, and the upper yarn is guided to the yarn joining device 14. .

  On the other hand, when performing yarn splicing, the lower yarn blowing section 11 sends the lower yarn upward. This lower thread is sucked by the yarn trap 15. As a result, the lower thread is guided to the yarn joining device 14. The yarn joining device 14 performs yarn joining with respect to the guided upper yarn and lower yarn. The yarn divided as described above can be spliced.

  The yarn storage device 19 temporarily stores the yarn 20 unwound from the yarn supply bobbin 21. As shown in FIG. 1, the yarn storage device 19 mainly includes a storage roller 61, a storage roller drive motor 62, and an annular member 63.

  The storage roller 61 is formed as a substantially cylindrical member, and stores the yarn 20 by winding the yarn 20 around the outer peripheral surface thereof. The storage roller drive motor 62 rotationally drives the storage roller 61 about its central axis. The operation of the storage roller drive motor 62 is controlled by the control unit 50.

  Since the winder unit 2 stores a certain amount of the yarn 20 in the yarn storage device 19, the unwinding of the yarn 20 from the yarn feeding bobbin 21 is interrupted for some reason (for example, when piecing is performed). Even if it exists, the yarn 20 stored in the yarn storage device 19 can be wound up. Thereby, even if the unwinding of the yarn 20 is interrupted, the winding of the yarn 20 around the package 30 can be continued.

  An annular member 63 is disposed in the vicinity of the downstream end of the storage roller 61. The yarn 20 stored in the yarn storage device 19 is drawn downstream through the space between the annular member 63 and the surface of the storage roller 61. With this configuration, an appropriate tension can be applied to the yarn 20 unwound from the storage roller 61, so that the unwinding of the yarn 20 from the yarn storage device 19 can be stabilized.

  Near the storage roller 61, a lower limit sensor 64 and an upper limit sensor 65 are attached. The lower limit sensor 64 detects whether or not the yarn 20 having a predetermined lower limit value or more is stored in the storage roller 61. The upper limit sensor 65 detects whether or not the yarn 20 having a predetermined upper limit value or more is stored in the storage roller 61. The detection results of the lower limit sensor 64 and the upper limit sensor 65 are output to the control unit 50.

  Next, with reference to FIG. 3, control for adjusting the storage amount of the storage roller 61 by controlling the rotational speed of the traverse drum 24 will be described.

  First, the control unit 50 determines whether or not there is a possibility that the storage amount of the yarn storage device 19 is lost (S101). This determination is made based on, for example, whether the storage amount of the yarn storage device 19 is equal to or less than the lower limit value based on the detection result of the lower limit sensor 64. When the controller 50 determines that there is a possibility that the storage amount of the yarn storage device 19 is lost, the controller 50 decelerates the traverse drum drive motor 41 to prevent the storage amount of the yarn storage device 19 from being lost. The vibration drum 24 is stopped (S102).

  Here, when the traverse drum 24 is decelerated as described above, a slip (hereinafter referred to as a package slip) may occur between the traverse drum 24 and the package 30. In the present embodiment, since the deceleration control described later is performed to decelerate the traverse drum 24, package slip can be suppressed.

  Since the winder unit 2 includes the yarn storage device 19, the control unit 50 stops the traverse drum 24 in a state where the yarn 20 is connected between the yarn storage device 19 and the winding unit 8. Further, the control unit 50 stops the traverse drum 24 in a state where the package 30 is in contact with the traverse drum 24 without being separated from the traverse drum 24.

  When the controller 50 determines in step S101 that there is no possibility (or low possibility) that the storage amount of the yarn storage device 19 is lost, the yarn storage device 19 is based on the detection result of the upper limit sensor 65. It is determined whether or not the amount of storage is greater than or equal to the upper limit value (S103).

  When the upper limit sensor 65 does not detect the yarn 20, the control unit 50 determines that the storage amount of the yarn storage device 19 is less than the upper limit value. In this case, since it is necessary to prevent the storage amount of the yarn storage device 19 from decreasing, the control unit 50 rotates the traverse drum 24 at a first rotational speed that is a relatively low speed (S104). Note that when the rotational speed of the traverse drum 24 is decreased to the first rotational speed, the control unit 50 performs deceleration control described later.

  When the upper limit sensor 65 detects the yarn 20 in the determination in step S103, the control unit 50 determines that the storage amount of the yarn storage device 19 is greater than or equal to the upper limit value. In this case, since the storage amount of the yarn storage device 19 is sufficient, the control unit 50 rotates the traverse drum 24 at the second rotational speed which is a relatively high speed (S105). Note that the controller 50 stops the traverse drum 24 or changes the rotational speed based on the storage amount of the yarn storage device 19, and then performs the processing from step S101 onward. Thereby, according to the storage amount of the yarn storage device 19, the traverse drum 24 can be controlled to adjust the storage amount.

  Next, the deceleration control performed by the control unit 50 will be described based on FIGS.

  The controller 50 calculates the rotational speed of the package 30 (the peripheral speed of the package 30) and the rotational speed of the traverse drum 24 (the peripheral speed of the traverse drum 24) for a predetermined period before performing the deceleration control. (S201). The rotation speed of the package 30 is calculated based on the detection result of the package rotation sensor 47. The rotational speed of the traverse drum 24 is calculated based on the detection result of the traverse drum rotation sensor 42. The rotational speed of the traverse drum 24 may be calculated based on the command value of the control unit 50. Here, the predetermined period is arbitrary, but can be, for example, one period of disturb control.

  Next, the control unit 50 calculates a reference rotation ratio based on the acquired rotation speed of the package 30 and the rotation speed of the traverse drum 24. The reference rotation ratio is a reference value for estimating the above-described package slip. Specifically, the control unit 50 first calculates an average value of the rotation speeds of the package 30 and the traverse drum 24 in a predetermined period. Then, the ratio (reference rotation ratio) between the average rotation speed of the package 30 and the average rotation speed of the traverse drum 24 is calculated (S202).

  Here, it is considered that the package slip larger than the package slip within the allowable range caused by the driven rotation does not occur (peripheral speed is substantially equal) before the deceleration control is performed. Therefore, after the start of the deceleration control, when the ratio of the rotational speeds of the package 30 and the traverse drum 24 matches the reference rotational ratio, it can be estimated that no package slip has occurred. Since the diameter of the package 30 increases as the yarn 20 is wound, the peripheral speed increases as the winding proceeds even at the same rotational speed. Considering this, in this embodiment, the reference rotation ratio is periodically calculated and continuously updated before the deceleration control is performed.

  Further, the control unit 50 determines whether or not a deceleration control start condition is satisfied while performing a process of updating the reference rotation ratio (S203). As described above, when the storage amount of the yarn storage device 19 decreases, the deceleration control start condition is satisfied. Further, for example, when the yarn splicing cannot be performed, the start condition of the deceleration control is satisfied. The case where the yarn splicing cannot be performed means that when a malfunction occurs in the yarn splicing device 14, or when the control unit 50 and the yarn splicing device 14 cannot communicate, the yarn feeding bobbin support unit 7 supports the yarn feeding bobbin 21. This is the case. In such a case, yarn splicing cannot be performed, and therefore the amount of storage of the yarn storage device 19 cannot be increased. Further, even when yarn splicing can be performed, deceleration control may be performed so that winding of the package 30 is continued at a low speed until the yarn splicing is completed.

  When the control unit 50 determines that the deceleration control start condition is satisfied, the control unit 50 stops updating the reference rotation ratio and sets the deceleration of the traverse drum 24 (the amount of decrease in rotational speed or peripheral speed per unit time). A value is called (S204). This set value may be a value input in advance by the operator, or may be a value stored in advance in the control unit 50 or the like.

  Note that the processing in step S204 can be calculated based on the package diameter or the like instead of using a preset value. The package diameter is calculated based on the detection result of the rotation angle sensor 46. The control unit 50 decreases the initial value of deceleration as the package diameter increases (that is, gradually decreases the rotational speed). This is because the larger the package diameter, the greater the inertial force, so that package slippage is likely to occur. The initial value of the deceleration may be continuously changed according to the package diameter or may be changed stepwise.

  Then, the control unit 50 controls the traverse drum driving motor 41 using the called deceleration setting value to start deceleration of the traverse drum 24 (S205). Next, the control unit 50 calculates the slip amount of the package from the difference in the peripheral speed between the package 30 and the traverse drum 24 based on the reference rotation ratio. The control unit 50 determines whether or not the calculated package slip amount is greater than or equal to a preset upper limit value (upper limit slip amount) (S206). The control unit 50 does not perform control for changing the deceleration particularly when the calculated package slip amount is smaller than the upper limit slip amount. When the calculated package slip amount is equal to or greater than the upper limit slip amount, the control unit 50 detects which peripheral speed of the package 30 and the traverse drum 24 is higher (S207).

  Immediately after the deceleration control, the package 30 may not follow the deceleration of the traverse drum 24 and a package slip may occur. In this case, the peripheral speed of the package 30 is slower than the traverse drum 24. Therefore, in this case (that is, if Yes in S207), the control unit 50 decreases the deceleration of the traverse drum 24 (decelerates the traverse drum 24 more slowly, S208).

  Next, the control unit 50 determines whether or not the deceleration of the traverse drum 24 is smaller than a predetermined lower limit value (S209). When the deceleration of the traverse drum 24 is equal to or greater than the lower limit value, the control unit 50 determines whether the traverse drum 24 has reached a target rotational speed (for example, 0, first rotational speed, second rotational speed). Judgment is made (S211). When it is determined that the target rotational speed has not been reached, the control unit 50 performs the processing subsequent to step S206 again.

  When the control unit 50 performs the process of step S208 several times, the deceleration of the traverse drum 24 decreases. Thereby, the deceleration of the traverse drum 24 may be smaller than the above lower limit value. When the deceleration of the traverse drum 24 is reduced to a value smaller than the lower limit value, it takes time to stop the traverse drum 24, and it is considered that the storage amount of the yarn storage device 19 is significantly reduced. Therefore, in this case (that is, in the case of Yes in step S209), the control unit 50 operates the package brake 80 (S210). Thereby, even if the package 30 cannot follow the deceleration of the traverse drum 24, the package 30 can be decelerated more rapidly.

  When the package brake 80 is operated, the peripheral speed of the package 30 is significantly reduced, and therefore the peripheral speed of the package 30 may be smaller than the peripheral speed of the traverse drum 24. In this case (ie, No in S207), the control unit 50 increases the deceleration of the traverse drum 24 (decelerates the traverse drum 24 more rapidly, S212).

  Note that an upper limit value is set in advance for the deceleration of the traverse drum 24, and the control unit 50 determines whether or not the deceleration of the traverse drum 24 has reached the upper limit value of the deceleration of the traverse drum 24. Judgment is made (S213). When the traverse drum 24 exceeds the upper limit value and the control unit 50 determines that the package brake 80 is operating (S214), the control unit 50 releases the package brake 80 (S215). Thereafter, the control unit 50 determines whether or not the traverse drum 24 has reached the target rotational speed (S211), and if not, performs the processing after S206 again. Therefore, it can be considered that the operation and release of the package brake 80 are repeated.

  By repeating the above control, the traverse drum 24 is decelerated in a short time while adjusting the speed difference between the circumferential speeds of the traverse drum 24 and the package 30 (that is, the package slip amount) to be a predetermined value or less. Can do. Further, when the storage amount of the yarn accumulating device 19 increases after the traverse drum 24 reaches the target rotational speed, the control unit 50 resumes the rotation of the traverse drum 24 or accelerates it to a new target rotational speed.

  Next, referring to FIG. 6, changes in the peripheral speeds of the package 30 and the traverse drum 24 when the deceleration control is performed will be briefly described using a graph.

  As described above, the control unit 50 calculates and updates the reference rotation ratio (S202). In the example illustrated in FIG. 6, the reference rotation ratio calculated by the control unit 50 using a predetermined period (from time T1 ′ to time T2 ′) is the reference rotation ratio obtained thereafter (from time T1 to time T2). It is updated with.

  Thereafter, it is assumed that the deceleration control start condition is satisfied at time T3. In this case, the reference rotation ratio obtained in the latest predetermined period (from time T1 to time T2) is used. At first, since the package 30 cannot follow the deceleration of the traverse drum 24, the peripheral speed of the package 30 is higher. Therefore, the peripheral speed of the traverse drum 24 is reduced by performing the process of step S208.

  Thereafter, the control unit 50 activates the package brake 80 at the timing (time T4) when the deceleration of the traverse drum 24 becomes smaller than the lower limit value (S210). Thereby, the package 30 decelerates rapidly. Then, the package brake 80 is released at the timing (time T5) when the deceleration of the package 30 exceeds the upper limit value of the deceleration of the traverse drum 24 (S214). Thereafter, the rotational speed of the traverse drum 24 reaches the target rotational speed, and the deceleration control ends.

  As described above, the automatic winder of the present embodiment includes the yarn feeding bobbin support portion 7, the yarn storage device 19, the winding portion 8, and the control portion 50. The yarn supplying bobbin support portion 7 can supply the yarn 20. The yarn storage device 19 winds and temporarily stores the yarn 20 from the yarn supply bobbin 21 supported by the yarn supply bobbin support portion 7. The winding unit 8 forms the package 30 by pulling the yarn 20 from the yarn storage device 19 and winding it on the winding bobbin 22. The control unit 50 controls the winding unit 8. The winding unit 8 includes rotation holders 44 and 45, a package rotation sensor 47, a traverse drum 24, and a traverse drum drive motor 41. The rotation holders 44 and 45 support the package 30 in a rotatable manner. The package rotation sensor 47 detects the rotation amount of the package 30. The traverse drum 24 contacts and rotates the package 30 supported by the rotation holders 44 and 45 to rotate the package 30. The traverse drum drive motor 41 drives the traverse drum 24 to rotate. Based on the detection result of the package rotation sensor 47 and the rotational speed of the traverse drum 24, the control unit 50 is in a state where the yarn 20 is connected between the yarn storage device 19 and the winding unit 8 and the package 30. In a state where the traverse drum 24 is in contact with the traverse drum 24, a deceleration control is performed to decelerate the traverse drum 24 while adjusting the speed difference between the peripheral speeds of the package 30 and the traverse drum 24 to be a predetermined value or less.

  Thereby, package slip can be suppressed without slowing down the traverse drum 24 slowly. Therefore, it is possible to suppress a decrease in the storage amount of the yarn storage device 19 while preventing the occurrence of traversing.

  In the automatic winder of the present embodiment, the control unit 50 decelerates in a state where the yarn 20 is coupled between the yarn accumulating device 19 and the winding unit 8 and the traverse drum 24 and the package 30 are in contact with each other. The traverse drum 24 is stopped by performing control.

  As a result, even when the package 30 is stopped, package slippage (and thus occurrence of twill) can be prevented.

  In the automatic winder of the present embodiment, the control unit 50 resumes winding the yarn 20 around the package supported by the rotary holders 44 and 45 after stopping the traverse drum 24.

  As a result, the package 30 can be stopped by the deceleration control according to the present invention, so that the occurrence of crossing can be prevented, so that the winding of the package 30 can be resumed without any problem.

  In the automatic winder of the present embodiment, the control unit 50 determines that the yarn 20 stored in the yarn storage device 19 is less than a predetermined value (the lower limit value of the lower limit sensor 64 or the upper limit value of the upper limit sensor 65). Perform deceleration control.

  Thereby, even when recovering the reduced storage amount, the package slip can be suppressed.

  Further, in the automatic winder of the present embodiment, the control unit 50 determines whether the package 30 and the traverse swing are based on the rotation speed of the traverse drum 24 and the detection result of the package rotation sensor 47 in a predetermined period before the start of the deceleration control. A reference value (reference rotation ratio) of the difference in peripheral speed of the drum 24 is calculated, and deceleration control is performed using the reference rotation ratio.

  Thus, the package slip amount during the deceleration control can be easily estimated by using the rotational speeds of the package 30 and the traverse drum 24 before the deceleration control (that is, before the package slip occurs).

  Further, the automatic winder of this embodiment includes a rotation angle sensor 46 that detects the amount of the yarn 20 wound around the package 30. The control unit 50 may determine the initial value of the deceleration control deceleration in consideration of the detection result of the rotation angle sensor 46.

  As a result, the initial value of the deceleration can be determined in consideration of the magnitude of the inertial force of the package 30, so that the package slip can be more reliably suppressed.

  Further, the automatic winder of the present embodiment includes a package brake 80 that contacts the winding bobbin 22 and brakes the package 30. The control unit 50 operates the package brake 80 based on the deceleration of the traverse drum 24 to decelerate the package 30.

  Thereby, since the rotational speed of the package 30 can be forcedly reduced, the rotational speed of the package 30 can be brought close to a desired value in a short time.

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

  In the above embodiment, the initial value of deceleration is determined based on the package diameter at the start of deceleration control. However, this initial value may be determined based on, for example, the package rotation speed at the start of deceleration control. Specifically, as the rotational speed of the package 30 increases, the inertial force increases and the package slips more easily. Therefore, it is preferable to reduce the initial value of the deceleration (that is, to gradually decelerate the traverse drum 24). . Further, considering the package diameter and the rotational speed of the package 30, not only the initial value but also the amount of change in deceleration may be controlled.

  In the above embodiment, the traverse drum drive motor 41 is controlled by the control unit 50 that performs general-purpose control, but may be controlled by a motor control unit provided separately from the control unit 50. Moreover, in the said embodiment, although deceleration control is performed by the control part 50 provided for every winder unit 2, you may perform a part or all of the process performed by deceleration control with an apparatus control apparatus.

  In the above embodiment, the yarn amount of the package 30 is detected by the rotation angle sensor 46 that detects the rotation angle of the cradle 23. However, the yarn amount of the package 30 is detected by a sensor that detects the length of the yarn 20 to be wound. It may be detected.

  In the above embodiment, the traverse drum rotation sensor 42 and the package rotation sensor 47 are configured to output a pulse signal corresponding to the rotation to the control unit 50, but the rotation speed may be calculated and output to the control unit 50. .

  In the above-described embodiment, the example in which the yarn supplying bobbin 21 is supplied by the magazine type bobbin supplying device 26 has been described. However, a yarn winding device including a tray type bobbin supplying device may be used.

  The configuration of the present invention can be applied not only to the automatic winder but also to other types of yarn winding devices including a yarn accumulating device and a contact roller.

2 Winder unit 7 Yarn supply bobbin support part (yarn supply part)
8 Winding part (package forming part)
19 Yarn storage device 24 Traverse drum (contact roller)
30 Package 41 Traverse drum drive motor (roller drive source)
42 Traverse drum rotation sensor 44, 45 Rotation holder (package support)
46 Rotation angle sensor (package yarn amount detection unit)
47 Package rotation sensor (package rotation detector)
50 Control unit 80 Package brake

Claims (10)

A yarn supplying section capable of supplying yarn;
A yarn storage device that winds and temporarily stores the yarn from the yarn supply unit;
A package forming unit that forms a package by drawing the yarn from the yarn storage device and winding the yarn on a winding bobbin;
A control unit for controlling the package forming unit;
With
The package forming part is
A package support for rotatably supporting the package;
A package rotation detector for detecting the amount of rotation of the package;
A contact roller for rotating the package by rotating in contact with the package supported by the package support;
A roller drive source for rotationally driving the contact roller;
Have
The control unit is configured such that a yarn is connected between the yarn storage device and the package forming unit based on a detection result of the package rotation detection unit and a rotation speed of the contact roller, and the package and the package A yarn winding device that performs deceleration control for decelerating the contact roller while adjusting a difference in peripheral speed between the package and the contact roller to be a predetermined value or less while the contact roller is in contact with the yarn. . The yarn winding device according to claim 1,
The control unit stops the contact roller by performing the deceleration control in a state where the yarn is coupled between the yarn storage device and the package forming unit and the contact roller and the package are in contact with each other. A yarn winding device. The yarn winding device according to claim 1 or 2,
The control unit restarts the winding of the yarn around the package supported by the package supporting unit after stopping the contact roller. A yarn winding device according to any one of claims 1 to 3,
The yarn winding device, wherein the controller performs the deceleration control when the yarn stored in the yarn accumulating device becomes less than a predetermined value. A yarn winding device according to any one of claims 1 to 4,
The control unit is a reference value of a difference between a peripheral speed of the package and the contact roller based on a rotation speed of the contact roller and a detection result of the package rotation detection unit in a predetermined period before the start of the deceleration control. And the deceleration control is performed using the reference value. A yarn winding device according to any one of claims 1 to 5,
A package yarn amount detection unit for detecting the amount of yarn wound around the package;
The control unit determines a set value for the deceleration control in consideration of a detection result of the package yarn amount detection unit. The yarn winding device according to any one of claims 1 to 6,
A package brake for braking the package in contact with the winding bobbin or the package;
The yarn winding device according to claim 1, wherein the control unit operates the package brake based on the deceleration of the contact roller to decelerate the package. A yarn winding device according to any one of claims 1 to 7,
The yarn supplying portion is a yarn supplying bobbin supporting portion on which a yarn supplying bobbin around which a yarn spun by a spinning machine is wound is supported,
The yarn winding device according to claim 1, wherein the contact roller is a traverse drum formed with traverse grooves for traversing the yarn wound around the package. A yarn winding device according to any one of claims 1 to 8,
A yarn joining device that is arranged between the yarn supplying section and the yarn accumulating device and that joins the separated yarn when the yarn is divided;
The control unit performs the deceleration control when it is detected that yarn splicing by the yarn splicing device is impossible. A package rotation detecting step in which the package forming unit detects a rotation amount of the package formed by winding the yarn around the winding bobbin;
On the basis of the detection result of the package rotation detection step and the rotation speed of the contact roller that rotates the package by contacting and rotating the package, the yarn is wound from the yarn supplying unit and temporarily stored. In a state where the yarn is connected between the yarn storage device and the package forming unit and the package and the contact roller are in contact with each other, a difference in peripheral speed between the package and the contact roller is equal to or less than a predetermined value. Decelerating step of decelerating the contact roller while adjusting to
A package deceleration method comprising:

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