JP6656604B2 - Thread cutting control device, yarn monitoring device, and yarn winding device - Google Patents

Description

  The present invention mainly relates to a yarn cutting control device capable of adjusting a cutting position at which a yarn is cut by a cutting device.

  Conventionally, in a yarn winding device that winds a yarn into a package while traversing the yarn, when the yarn is cut due to detection of a defect of the yarn or the like, at a timing excluding a timing at which the yarn is near the traverse folding position, A configuration for cutting a yarn is known. Patent Document 1 discloses an automatic winder as this type of yarn winding device.

  The automatic winder disclosed in Patent Document 1 is an automatic winder that wraps a yarn in a package while traversing the yarn, and cuts the yarn by detecting a defect in the yarn. The detecting device detects a traverse motion of the yarn, and a detection signal of the detecting device. Control means for controlling the timing of cutting the yarn based on the detection of the defect of the yarn. Based on the detection signal of the detection means, the control means detects the yarn defect at a timing when the yarn is within a range excluding the vicinity of the traverse turnback position on at least one end face side of the package in the entire traverse area. Thread cutting by detection is performed.

  According to the configuration of Patent Literature 1, when the current position of the yarn is in the vicinity of the traverse turn-back position, the yarn is dropped from the end face of the package by delaying the timing of cutting the yarn (hereinafter, referred to as a “thread”). This may be referred to as “end face drop.”).

Japanese Patent No. 4042271

  By the way, the detection means of Patent Document 1 has a configuration including a plurality of position detection sensors which are optical sensors including a light projecting element and a light receiving element. The position detection sensor is disposed in the middle of the traveling path (in the traverse area) of the yarn traveling from the yarn monitoring device to the package, and detects the moment at which the yarn passes as the moment at which light is interrupted. Is to directly detect the timing near the traverse turning position. Therefore, in order to appropriately control the thread cutting timing, it is indispensable to attach this position detection sensor to an accurate position.

  However, due to the mounting error that occurs when the position detection sensor is mounted on the support bracket and the mounting error that occurs when the support bracket is mounted on an appropriate position of the automatic winder, the position detection sensor cannot be accurately positioned in the traverse area. In some cases, it was difficult to mount the device at a proper position. In addition, once the position detection sensor is attached to a predetermined position, usually, the position of the detection sensor is not changed. Therefore, the traverse position (range) where the yarn cutting is prohibited is flexibly set according to the physical properties of the yarn. It was difficult to change. Further, in order to control the timing of cutting the yarn with the above configuration, it is necessary to input a detection signal detected by the detection means to a control means for controlling the operation of the entire automatic winder. It is also necessary to input the yarn defect detection signal detected by the device) to the control means. Therefore, the exchange of signals between the components becomes complicated, and it has been difficult to simplify the configuration for control. In view of the above points, there is room for improvement in the configuration of Patent Document 1 described above.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a yarn cutting control device capable of adjusting a cutting position at which a yarn is cut by a cutting device according to a traverse position of the yarn. It is about simplifying.

Means and effects for solving the problem

  The problem to be solved by the present invention is as described above. Next, means for solving the problem and its effects will be described.

  According to a first aspect of the present invention, there is provided a yarn cutting control device having the following configuration. That is, the yarn cutting control device controls the operation of the cutting device that cuts the yarn wound around the package while being traversed. This yarn cutting control device includes a yarn speed detecting unit, a traverse position estimating unit, and a cutting position adjusting unit. The yarn speed detection unit detects a yarn speed at which the yarn travels. The traverse position estimating unit estimates a traverse position of the yarn based on the yarn speed detected by the yarn speed detecting unit. The cutting position adjusting unit adjusts a cutting position at which the cutting device cuts the yarn according to the traverse position of the yarn estimated by the traverse position estimating unit.

  By adjusting the cutting position at which the yarn is cut by operating the cutting device in accordance with the traverse position of the yarn, for example, the yarn is not cut at a position where the end face of the yarn may be dropped. The end face of the yarn can be prevented from falling off. Further, since the traverse position estimating unit estimates the traverse position of the yarn based on the yarn speed detected by the yarn speed detecting unit, a simple configuration is provided as compared with the case where a sensor for directly detecting the traverse position of the yarn is provided. Can be realized.

  In the yarn cutting control device, when the traverse position of the yarn is at an end of the traverse region of the package, the cutting position adjustment unit may perform the cutting after the traverse position moves to the center side of the traverse region. Preferably, the running distance of the yarn when operating the cutting device is adjusted so that the device operates. Here, “the end of the traverse region of the package” refers to a region of the traverse region of the package that is close to the end surface of the package.

  This makes it possible to prevent the end surface of the yarn from dropping by simple control for increasing the travel distance of the yarn when operating the cutting device.

  In the yarn cutting control device, the traverse position estimating unit estimates the traverse position based on the characteristic of the yarn speed detected by the yarn speed detecting unit.

  This makes it possible to adjust the cutting position for cutting the yarn to an appropriate position with a simple configuration as compared with a case where the traverse position is directly detected by a position sensor or the like disposed in the traverse area.

  In the yarn cutting control device described above, the following configuration is preferable. That is, the package has a cone shape whose diameter increases from one end in the axial direction to the other end. The traverse position estimating unit estimates the traverse position based on a running distance of the yarn when an extreme value appears in a process of periodically increasing and decreasing the yarn speed detected by the yarn speed detecting unit.

  This makes it possible to appropriately estimate the traverse position by utilizing the fact that the yarn speed periodically increases and decreases when the yarn is wound up to form a cone-shaped package.

  In the yarn cutting control device described above, the following configuration is preferable. That is, the traverse position estimating unit includes a yarn speed smoothing unit that smoothes data indicating a periodic change in the yarn speed detected by the yarn speed detecting unit. The traverse position estimating unit estimates the traverse position based on the running distance of the yarn when an extreme value appears in the process of periodically increasing and decreasing the yarn speed after smoothing by the yarn speed smoothing unit.

  Thus, errors due to small irregular fluctuations in the yarn speed can be suppressed, so that the traverse position can be accurately estimated.

  In the yarn cutting control device, the yarn speed smoothing unit preferably smoothes data indicating a periodic change in the yarn speed by a moving average method.

  Thereby, by appropriately setting the points of the moving average, it is possible to satisfactorily grasp the increasing / decreasing tendency of the yarn speed appearing according to the traverse position while suppressing errors due to fine irregular fluctuations occurring in the yarn speed. . As a result, the traverse position can be accurately estimated. Further, the yarn speed can be smoothed by a simple calculation.

  In the yarn cutting control device, the traverse position estimating unit may determine that a travel distance between at least two nearest travel positions of the yarn at which the maximum value of the yarn speed appears, or a minimum value of the yarn speed. It is preferable to estimate the traverse position of the yarn based on a running distance between at least two recent running positions of the yarn that have appeared.

  Thus, the traverse position of the yarn can be appropriately estimated based on the running distance of the yarn. Also, by using the running distance of the yarn when the maximum value or the minimum value appears in the yarn speed as a reference, the cycle of increase or decrease in the yarn speed can be easily and clearly grasped, and one cycle of increase or decrease in the yarn speed (traverse 1 It is possible to accurately acquire the travel distance of the yarn corresponding to the batch. Further, the travel distance of the yarn corresponding to one traverse may change as the diameter of the package increases. In this configuration, for example, the yarn travel distance based on the yarn travel distance in one cycle of the latest yarn speed increase / decrease is used. Since the traverse position is estimated, the estimation accuracy of the traverse position can be stabilized.

  In the yarn cutting control device described above, the following configuration is preferable. That is, the yarn cutting control device determines whether or not the cutting device can be operated based on the traverse position of the yarn estimated by the traverse position estimating unit, and notifies the cutting device operation command unit whether the cutting device is activated or not. A prohibition determination unit that outputs a command signal for commanding operation is provided. The prohibition determining unit is configured to determine a traverse travel distance that is a travel distance of the yarn detected during the latest one cycle in which the yarn speed increases or decreases, and a travel distance of the yarn when a maximum value or a minimum value of the yarn speed appears. A prohibition range indicating a range in which the yarn cutting is prohibited in one cycle of the traverse, and a current value from the running position of the most recent yarn where the maximum value or the minimum value of the yarn speed appears to the present. The operation of the cutting device is determined based on the running distance of the yarn detected in the meantime.

  Thus, the travel distance traveled by the yarn from the travel position of the latest yarn at which the maximum / minimum value of the yarn speed appears to the present time is detected, and the travel distance is determined to be a travel range in which the yarn cutting is prohibited in the prohibited range. By examining whether or not the distance falls within the range, it is possible to appropriately and easily determine whether or not the cutting device is to be operated, thereby preventing the end face of the yarn from falling. Furthermore, the running distance of the yarn corresponding to one cycle of the traverse changes as the diameter of the package increases, but in this configuration, the running distance of the yarn is determined based on the running distance of the yarn in the latest one cycle in which the yarn speed increases and decreases. The end surface of the yarn can be stably prevented from falling without being affected by an increase in the diameter of the package. Preferably, the cutting device operation command section is configured to output an operation command signal to the cutting device to operate the cutting device.

  In the yarn cutting control device described above, the following configuration is preferable. That is, this yarn cutting control device is configured to be able to change the length of the cutting prohibited traverse range, which is the range where the yarn cutting is prohibited at the end of the traverse area of the package. The cutting position adjustment unit is configured to, when a yarn cutting signal requesting the cutting of the yarn is input to the yarn cutting control device, when the traverse position estimated by the traverse position estimation unit is within the cutting prohibition traverse range. Adjusts the travel distance of the yarn when the cutting device operates so that the cutting device operates after the traverse position of the yarn moves and deviates from the cutting prohibition traverse range.

  Accordingly, the yarn is cut by operating the cutting device after delaying until the yarn comes to a position outside the cutting prohibition traverse range, so that the end surface of the yarn can be reliably prevented from dropping. In addition, since the length of the cutting prohibition traverse range can be changed by software, the operator can flexibly change the length of the cutting prohibition traverse range in consideration of the physical properties of the yarn, thereby improving convenience. Can be done.

  According to a second aspect of the present invention, a yarn monitoring device having the following configuration is provided. That is, the yarn monitoring device includes the yarn cutting control device, and further includes a yarn defect detection unit that detects a defect of the yarn. When detecting the defect of the yarn, the yarn defect detection unit outputs a yarn defect detection signal as a yarn cutting signal for requesting cutting of the yarn to the yarn cutting control device.

  Thus, when the yarn defect detection unit detects a yarn defect, the yarn can be cut by the cutter at a yarn traveling distance adjusted so that the end surface of the yarn does not drop.

  It is preferable that the yarn monitoring device includes the cutting device.

  Accordingly, the exchange of the control signal from the detection of the defect of the yarn to the activation of the cutting device can be easily completed in the yarn monitoring device, so that the configuration can be simplified.

  In the yarn monitoring device, the cutting device is preferably a cutter.

  Thereby, the yarn can be cut with a simple configuration.

  In the above-described yarn winding device, the following configuration is preferable. That is, the yarn winding device includes a yarn supplying unit and a package forming unit. The yarn supplying section supports a yarn supplying bobbin. The package forming unit winds the yarn of the yarn supplying bobbin of the yarn supplying unit to form the package. The yarn monitoring device is disposed between the yarn supplying unit and the package forming unit.

  Accordingly, it is possible to provide a yarn winding device having a simple configuration in which the end surface of the yarn hardly drops.

  In the above-described yarn winding device, the following configuration is preferable. That is, the yarn winding device includes a winding drum, a yarn joining device, and a control unit. The winding drum rotates the package in contact with the package to wind the yarn from the yarn supplying unit into the package. The yarn splicing device performs a yarn splicing operation for joining the yarn from the yarn supplying unit and the yarn from the package forming unit when the cutting device is operated to cut the yarn. The control unit controls the yarn winding device. The controller controls the yarn over a length equal to or longer than a travel distance of the yarn from a position of the yarn when the yarn defect is detected by the yarn defect detection unit to a position where the cutting device is operated to cut the yarn. The winding drum is controlled to reverse the package until it is pulled out of the package, and then the yarn joining device is caused to perform the yarn joining operation.

  That is, in the yarn winding device including the above-described yarn monitoring device, even when the yarn monitoring device detects a defect of the yarn, the timing of the operation of the cutting device may be delayed in order to prevent the end face from falling. In this regard, according to this configuration, even when the yarn is additionally wound into the package by an amount corresponding to the delay in the operation of the cutting device, a sufficient length of yarn including the additional amount is drawn out of the package. Since the yarn splicing device performs the yarn splicing operation, the yarn defect detected by the yarn monitoring device can be reliably removed.

The side view of the winder unit concerning one embodiment of the present invention. The front view of a winder unit. FIG. 2 is a block diagram showing a configuration of a yarn monitoring device provided in the winder unit. FIG. 3 is a block diagram showing a configuration of a traverse position estimating unit and a cutting position adjusting unit. (A) A graph showing data indicating a periodic change in the yarn speed before smoothing. (B) A graph showing data indicating a periodic change after smoothing by the moving average method. A process for obtaining a reference position at which a yarn is estimated to be located at an end of a traverse region of a package and a distance section for calculating a latest traverse traveling distance using data indicating a periodic change in the yarn speed. Graph explaining. FIG. 4 is a diagram illustrating a cutting prohibition traverse range set at an end of a traverse area of a package. The figure explaining the prohibition traverse ratio calculated based on a cutting prohibition traverse range. 9 is a flowchart showing processing performed by a traverse position estimating unit and a cutting position adjusting unit to adjust the position of the thread cutting. 5 is a flowchart illustrating processing performed by a unit control unit.

  Next, with reference to the drawings, a configuration of a yarn monitoring device including a yarn cutting control device according to an embodiment of the present invention and an automatic winder including the yarn monitoring device will be described. FIG. 1 is a side view of a winder unit 10 according to one embodiment of the present invention. FIG. 2 is a front view of the winder unit 10.

  The winder unit 10 as the yarn winding device illustrated in FIGS. 1 and 2 traverses (traverses) a spun yarn 20 (hereinafter, may be referred to as a “yarn”) unwound from a yarn supplying bobbin 21. The package 30 is wound around the winding bobbin 22 and has a predetermined length and a predetermined shape (in this embodiment, a cone shape whose diameter increases from one end to the other end). The automatic winder according to the present embodiment includes a plurality of winder units 10 arranged side by side, and a machine control device (not shown) arranged at one end in the arranged direction.

  As shown in FIG. 1, each winder unit 10 includes a unit frame 11 provided on one side on the left and right sides in a front view, and a winding unit main body 16 provided on a side of the unit frame 11. I have. The winding unit main body 16 mainly includes a package forming section 31 and a yarn supplying section 28. The package forming section 31 is also called a winding section.

  The yarn supplying section 28 supports the yarn supplying bobbin 21 around which the yarn 20 is wound in a substantially upright posture. The yarn supplying bobbin 21 of the present embodiment is supplied to a support of a yarn supplying section 28 by, for example, a magazine type supply device 9 shown in FIG. The supply system of the yarn supplying bobbin 21 is not limited to this, and the yarn supplying bobbin 21 may be supplied by, for example, a tray-type supplying device.

  The package forming section 31 forms the package 30 by winding the yarn of the yarn supplying bobbin 21 of the yarn supplying section 28 around the winding bobbin 22. Specifically, the package forming unit 31 includes a cradle 23 that rotatably supports the winding bobbin 22 and a winding drum 24 that traverses the yarn 20 and drives the winding bobbin 22. . The cradle 23 is configured to be swingable in a direction approaching or separating from the winding drum 24. Accordingly, even if the diameter of the package 30 increases as the yarn 20 is wound on the package 30, the winding drum 24 can stably drive the package 30 to rotate. As shown in FIG. 2, a spiral (vine winding) traverse groove 27 is formed on the outer peripheral surface of the winding drum 24, and the yarn 20 is wound in the traverse groove 27 in a state of being wound. The yarn 20 is traversed by the rotation of the take-up drum 24.

  The take-up bobbin 22 is driven to rotate by the rotation of a take-up drum 24 that is arranged to face the take-up bobbin 22. The yarn 20 is wound around the rotating winding bobbin 22 while being traversed by the traverse groove 27. The winding drum 24 is connected to an output shaft of a drum driving motor 53, and the operation of the drum driving motor 53 is controlled by a motor control unit 54. The motor control unit 54 controls to drive and stop the drum drive motor 53 in response to a control signal from the unit control unit 50.

  Note that a rotation sensor 42 for detecting the rotation angle of the winding drum 24 is attached to the winding drum 24. The rotation sensor 42 is electrically connected to the unit control unit 50.

  Further, the winding unit main body 16 includes, in the yarn traveling path between the yarn supplying section 28 and the package forming section 31, in order from the yarn supplying section 28 side, the unwinding assisting device 12, the tension applying device 13, and the yarn The splicing device 14 and the yarn monitoring device 15 are arranged.

  The unwinding assisting device 12 assists the unwinding of the yarn 20 from the yarn supplying bobbin 21 by lowering the regulating member 40 covering the core tube in conjunction with the unwinding of the yarn 20 from the yarn supplying bobbin 21. It is. The regulating member 40 comes into contact with a balloon formed above the yarn supplying bobbin 21 when the yarn 20 unwound from the yarn supplying bobbin 21 is swung, and applies an appropriate tension to the balloon to thereby control the yarn. To help unwind.

  The tension applying device 13 applies a predetermined tension to the traveling yarn 20. As the tension applying device 13, for example, a gate type device in which movable comb teeth are arranged with respect to fixed comb teeth can be used. The movable comb teeth can be rotated by a rotary solenoid so that the comb teeth are in an engaged state or a released state. The tension applying device 13 can apply a constant tension to the yarn 20 to be wound, and can improve the quality of the package 30.

  The yarn monitoring device 15 detects a defect of the yarn 20 (hereinafter, may be referred to as a “yarn defect”) by monitoring the traveling yarn 20, and detects a yarn defect when the yarn defect is found. The cutting is performed at an appropriate timing that does not occur. As shown in FIGS. 1 to 3, the yarn monitoring device 15 mainly includes two yarn unevenness sensors 43 and 44, a cutter 46, and a control unit 45. Each of the two yarn unevenness sensors 43 and 44 includes, for example, a light projecting element and a light receiving element, and detects the thickness of the yarn 20 based on the amount of light received by the light receiving element (light receiving amount). The signals from the yarn unevenness sensors 43 and 44 are processed by the control unit 45 to detect a yarn defect and to detect the yarn defect speed and the speed of the yarn 20 traveling in the yarn monitoring device 15 (hereinafter sometimes referred to as “yarn speed”). ) Can be detected. Further, the controller 45 estimates the traverse position of the yarn 20 based on the yarn speed detected in this manner, and operates the cutter (cutting device) 46 in accordance with the traverse position of the yarn 20. A command signal (cutting device operation command signal) S3 is output to control the traveling distance of the yarn 20 when the yarn 20 is cut. The detailed configuration of the yarn monitoring device 15 will be described later.

  The yarn joining device 14 (the yarn supplying bobbin 21) is used when the yarn monitoring device 15 detects a yarn defect, when the yarn is cut, or when the yarn breaks during unwinding from the yarn supplying bobbin 21. And the upper thread of the package forming unit 31 (package 30). As the yarn joining device 14, a mechanical type, a type using a fluid such as compressed air, or the like can be used.

  A lower yarn guide pipe (first yarn catching guide member) 25 for capturing and guiding the lower yarn on the yarn supplying unit 28 and an upper yarn on the package forming unit 31 are provided below and above the yarn joining device 14. And an upper thread guide pipe (second thread catching guide member) 26 for catching and guiding. A suction port 32 is formed at a tip of the lower thread guide pipe 25, and a suction mouth 34 is provided at a tip of the upper thread guide pipe 26. In the present embodiment, the left-right width (width in the longitudinal direction) of the suction mouse 34 is configured to be substantially the same as the left-right width (width of the outer peripheral surface) of the package 30. An appropriate negative pressure source is connected to the lower thread guide pipe 25 and the upper thread guide pipe 26, respectively, so that a suction flow can be applied to the suction port 32 and the suction mouth 34.

  With this configuration, at the time of thread cutting or thread breakage, the suction port 32 of the lower thread guide pipe 25 captures the lower thread at the position shown in FIGS. 1 and 2, and then turns upward around the shaft 33. The lower yarn is guided to the yarn joining device 14 by moving. At about the same time, the upper thread guide pipe 26 pivots upward from the position shown in the figure around the shaft 35, and the upper thread unwound from the package 30 which is reversed by the drum drive motor 53 is moved by the suction mouth 34. Capture. Subsequently, the upper thread guide pipe 26 rotates downward about the shaft 35 so as to guide the upper thread to the thread joining device 14. In this way, the lower yarn and the upper yarn are joined (yarn splicing) by the yarn joining device 14.

  Next, the configuration of the yarn monitoring device 15 will be described in detail with reference to FIGS.

  As shown in FIG. 3 and the like, the yarn monitoring device 15 includes two yarn unevenness sensors 43 and 44, a cutter 46, and a control unit 45. The control unit 45 is configured as a small computer including hardware such as a CPU, a RAM, and a ROM, and the ROM stores various software including a control program and the like. Then, the cooperation of the hardware and the software allows the control unit 45 to function as the yarn defect detection unit 47, the cutting control unit (yarn cutting control device) 49, and the like.

  As shown in FIG. 2, the first yarn unevenness sensor 43 and the second yarn unevenness sensor 44 are arranged at appropriate intervals in the yarn running direction. In the present embodiment, the yarn unevenness sensors 43 and 44 are configured as a light emitting element and a light receiving element, and the light emitted from the light emitting element is received by the light receiving element, and the amount of received light is detected. With this configuration, when the thickness of the running yarn 20 changes, the amount of light received by the yarn unevenness sensors 43 and 44 changes, so that unevenness in the thickness of the yarn 20 (yarn unevenness) can be detected. The output signals of the yarn unevenness sensors 43 and 44 (yarn unevenness signals S1 and S2) are A / D converted and then input to the control unit 45 as shown in FIG. More specifically, the yarn unevenness signals S1 and S2 are input to the yarn speed detection unit 48 of the cutting control unit 49 included in the control unit 45. Further, the yarn unevenness signal S <b> 1 from the first yarn unevenness sensor 43 disposed downstream of the second yarn unevenness sensor 44 is input to the yarn defect detection unit 47 provided in the control unit 45. However, instead of this, the yarn unevenness signal S2 from the second yarn unevenness sensor 44 disposed on the upstream side of the first yarn unevenness sensor 43 may be input to the yarn defect detection unit 47 provided in the control unit 45. Good. Alternatively, both the yarn unevenness signal S1 from the first yarn unevenness sensor 43 and the yarn unevenness signal S2 from the second yarn unevenness sensor 44 may be input to the yarn defect detection unit 47 provided in the control unit 45. Good.

  The cutter 46 is disposed at a position where it can enter and retract with respect to the yarn path, and is driven by a drive mechanism (not shown). When a cutter operation command signal (cutting device operation command signal) S3 for operating the cutter 46 is input from the control unit 45 (cutting control unit 49) shown in FIG. 3 to the driving mechanism, the driving mechanism is immediately driven. The cutter 46 at the retracted position can enter the yarn path and cut the yarn 20. The above-mentioned driving mechanism can be constituted by, for example, a solenoid or the like. In this case, the above-mentioned cutter operation command signal S3 can be a solenoid driving signal.

  The yarn defect detection unit 47 detects a defect of the yarn 20 that needs to be cut and removed from the yarn unevenness signal S1 from the first yarn unevenness sensor 43 disposed on the downstream side (for example, the thickness of the yarn 20). Is detected, and a yarn defect detection signal S4 indicating that a yarn defect has been detected is output to the cutting control unit 49. When the yarn defect detection unit 47 determines the presence or absence of a yarn defect, the yarn speed V input from the yarn speed detection unit 48 described later is also considered.

  Here, when the yarn monitoring device 15 detects a yarn defect, the yarn monitoring device 15 is configured to cut the yarn 20 by the cutter 46 in order to remove a portion of the yarn defect. Therefore, it can be said that the yarn defect detection signal S4 output by the yarn defect detection unit 47 is a signal (yarn cutting signal) that substantially requests the yarn 20 to be cut.

  The cutting control unit 49 controls the operation of the cutter 46 based on the yarn defect detection signal S4 input from the yarn defect detection unit 47. The cutting control unit 49 includes a yarn speed detecting unit 48, a traverse position estimating unit 60, a cutting position adjusting unit 70, and a cutter operation command unit (cutting device operation command unit) 52.

  The yarn speed detecting section 48 compares the yarn unevenness signal S1 from the first yarn unevenness sensor 43 arranged on the downstream side with the yarn unevenness signal S2 from the second yarn unevenness sensor 44 arranged on the upstream side. The temporal deviation amount is calculated, and the yarn speed V can be calculated (detected) based on the temporal deviation amount and the interval between the first and second yarn unevenness sensors 43 and 44. The yarn speed V detected by the yarn speed detector 48 is output to the traverse position estimator 60. At the same time, based on the detected yarn speed V, the yarn speed detection unit 48 generates a pulse signal S5 that changes in a time period corresponding to the traveling of the yarn 20 for a fixed length (for example, 1 mm), and outputs the pulse signal S5 to the traverse position. Output to the estimation unit 60.

  The traverse position estimating unit 60 estimates the current traverse position of the yarn 20 based on the yarn speed V and the pulse signal S5 input from the yarn speed detecting unit 48. A signal indicating the estimated traverse position (traverse position signal S6) is output to cutting position adjustment unit 70.

  The cutting position adjustment unit 70 has a high possibility that the end face will drop if the yarn is cut by the cutter 46 at the current yarn position based on the traverse position signal S6 input from the traverse position estimation unit 60. It is determined whether or not. Then, based on the result of this determination, the cutting position adjusting unit 70 sends a cutting prohibition signal S7 for prohibiting cutting of the thread 20 or a cutting permission signal S8 for permitting cutting of the thread 20 to the cutter operation command. Output to the unit 52. The cutting prohibition signal S7 and the cutting permission signal S8 are command signals output by the prohibition judging unit 72 of the cutting position adjusting unit 70 to the cutter operation commanding unit 52 to command the operation or non-operation of the cutter 46.

  When the yarn defect detection signal S4 is input from the yarn defect detection unit 47, the cutter operation instruction unit 52 checks the content of the signal input from the cutting position adjustment unit 70 at that time, and cuts the signal into the cutter operation instruction unit 52. If the permission signal S8 is input, the cutter operation command signal S3 is immediately output to the cutter 46. On the other hand, when the cutting prohibition signal S7 is input to the cutter operation command unit 52 at the time when the yarn defect detection signal S4 is input, the cutter operation command unit 52 determines that the input signal changes from the cutting prohibition signal S7 to the cutting permission signal. It waits (delays) until the signal is switched to the signal S8, and outputs the cutter operation command signal S3 to the cutter 46. With such a configuration, when a yarn defect is found, the control unit 45 (cutting control unit 49) of the yarn monitoring device 15 cuts the yarn 20 at an appropriately adjusted cutting position so that the end surface does not drop. be able to.

Next, the configurations of the traverse position estimating unit 60 and the cutting position adjusting unit 70 will be described in more detail with reference to FIGS. FIG. 4 is a block diagram showing a configuration of the traverse position estimating unit 60 and the cutting position adjusting unit 70. FIG. 5 is a graph illustrating data indicating a periodic change in the yarn speed V and data obtained by smoothing the data. FIG. 6 calculates a reference position P _{S at} which the yarn is estimated to be located at the end of the traverse region of the package 30 and a latest traverse travel distance L using data indicating a periodic change in the yarn speed V. Is a graph for explaining a process of obtaining a distance section to be used. FIG. 7 is a diagram illustrating a cutting prohibition traverse range set at the end of the traverse area of the package 30. FIG. 8 is a diagram illustrating a prohibited traverse ratio calculated based on the cutting prohibited traverse range.

  As shown in FIG. 4, the traverse position estimating unit 60 includes a data smoothing unit (yarn speed smoothing unit) 61, a turnback position estimating unit 62, a reference position detecting unit 63, a nearest traverse traveling distance calculating unit 64, and a current traverse. A ratio calculation unit 65 and the like are provided.

  The data smoothing unit 61 calculates the moving average of the yarn speed V received from the yarn speed detection unit 48, and thereby smoothes data indicating a periodic change in the yarn speed V. That is, the data (raw data) indicating the periodic change in the yarn speed V received from the yarn speed detection unit 48 has a small and irregular change as shown in FIG. It is difficult to capture the overall characteristics of change. There are various reasons for this. One of the reasons is that the yarn 20 that enters the traverse groove 27 of the winding drum 24 and traverses has a complicated behavior according to the shape of the traverse groove 27 and the like. . Therefore, the data smoothing unit 61 of the traverse position estimating unit 60 smoothes data indicating a periodic change in the yarn speed V by the moving average method, and as shown in FIG. It is easy to catch the trend of increase and decrease. The score of the moving average is appropriately determined so that the irregular change in the yarn speed V can be suppressed and the periodic increase or decrease in the yarn speed V can be appropriately grasped.

  The folding position estimating unit 62 shown in FIG. 4 estimates a folding position at which the traverse position of the yarn 20 is folded at the end of the traverse area of the package 30 based on the data indicating the periodic change of the yarn speed V. Things. Specifically, when the shape of the package 30 is a cone as in the present embodiment, the yarn speed V may show a maximum value when the traverse position of the yarn 20 is at the end on the large diameter side of the package 30. Are known. In the present embodiment, by utilizing this, the traveling position where the yarn speed V becomes maximum in the data of the yarn speed V as shown in FIG. It is estimated that the position is (the other end), that is, the turning position.

The reference position detection unit 63 shown in FIG. 4 is configured to determine the running position of the yarn 20 when the yarn speed V has reached the local maximum (in other words, the latest package) based on the data indicating the periodic change in the yarn speed V. the folded position) of the large diameter side is detected as the reference position P _S. The reference position P _S is used as a reference position at the time of estimating the next occurrence mileage of the yarn 20 to the traverse position.

Last traverse travel distance calculating section 64, based on data indicating a periodic change in yarn speed V, detecting the position of the yarn 20 where the reference position P _S yarn speed V the most recent at the position before the line reaches the maximum and calculates the distance which the yarn 20 has traveled during the period from this position to the reference position P _S, as the travel distance of the yarn 20 per traversal once made most recently. In the following description, the travel distance of the yarn 20 per traverse may be referred to as “traverse travel distance”. In other words, the traverse traveling distance can be said to be a traveling distance corresponding to one cycle in which the yarn speed V increases or decreases. The latest traverse travel distance L is input from the yarn speed detection unit 48 during at least two recent travel positions of the yarn 20 where the maximum value appears in the data indicating the periodic change in the yarn speed V shown in FIG. By counting the pulse signal S5 thus obtained, the calculation can be performed with high accuracy.

The current traverse ratio calculation section 65 calculates a current traverse ratio that represents the current traverse position of the yarn 20 by a traverse ratio. Here, the traverse ratio is based on the distance traveled by the yarn 20 per one traverse (traverse travel distance), and it is assumed that the yarn 20 is located at the traverse end on the large diameter side in this embodiment. It means the ratio of the distance traveled by the yarn 20 from the estimated position (the reference position P _S ) to the current position.

Currently traverse ratio calculating unit 65, a distance which the yarn 20 from the reference position P _S until the current position has traveled is determined by counting the pulse signal S5 inputted from the yarn speed detecting section 48. Next, the current traverse ratio calculation unit 65 obtains the current traverse ratio by dividing the obtained travel distance by the latest traverse travel distance L calculated by the latest traverse travel distance calculation unit 64.

  As shown in FIG. 8, the current traverse ratio usually takes a value from 0 to 1 (from 0% to 100% in percentage), and increases from 0 to 1 as the yarn 20 is traversed. Then, when it reaches 1 (that is, when one traverse is completed), it returns to 0 and increases to approach 1 again. The current traverse ratio is based on the position of the yarn 20 when the yarn 20 is at the traverse end on the large diameter side (in other words, the traveling distance of the yarn 20 when the yarn speed V shows the maximum value) as a reference (0). This indicates which position the current position of the yarn 20 corresponds to in the process in which the yarn 20 reciprocates once by traverse. Thus, the current traverse ratio can be said to substantially represent the current traverse position of the yarn 20. The obtained value of the current traverse ratio is output from the current traverse ratio calculation section 65 to the cutting position adjustment section 70 as a traverse position signal S6.

  The cutting position adjustment unit 70 includes a prohibition traverse ratio calculation unit 71, a prohibition determination unit 72, and the like.

  The prohibited traverse ratio calculation unit 71 calculates a prohibited traverse ratio that expresses a range of a travel distance in which the thread cutting is prohibited in the above traverse travel distance by a traverse ratio. The above-mentioned prohibited traverse ratio is determined based on the range of the traverse position (cutting prohibited traverse range) where the thread cutting by the cutter 46 is prohibited, which is set in advance by a cutting prohibited traverse range setting unit (not shown). The cutting prohibition traverse range setting unit can be configured as, for example, an input key (not shown) provided in the machine control device.

  FIG. 7 shows a setting example of the above-mentioned cutting prohibition traverse range. In this example, in order to prevent the yarn from being cut at both end surfaces of the package 30 and the vicinity thereof (at the end of the traverse region of the package 30) and causing the end surface to drop, the small diameter side in the traverse width direction is used. The traverse position up to 5 mm from the end surface and the traverse position up to 5 mm from the large-diameter end surface are set as the cutting prohibited traverse ranges. However, the length of the cutting prohibition traverse range (5 mm from the small diameter side, 5 mm from the large diameter side) is an example, and for example, when the operator operates the cutting prohibition traverse range setting unit (input key), for example, It can be appropriately changed to 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, or the like.

  It is preferable that the length of the cutting prohibited traverse range is set in consideration of the physical properties of the yarn 20 and the like. For example, it is conceivable that the length of the cutting prohibition traverse range is set to be short if the yarn 20 has the property of hardly falling off the end face, and the length of the cutting prohibition traverse range is set long if the yarn 20 has the property of easily dropping the end face. Can be Further, if the length of the cutting prohibition traverse range is increased, the operation of the cutter 46 is greatly delayed, so that the amount of waste thread generated increases. It is preferable to set the height.

  The prohibited traverse ratio calculation unit 71 calculates the prohibited traverse ratio based on the number of winds in the traverse groove 27 of the winding drum 24, corresponding to the length of the cutting prohibited traverse range set as described above. . The prohibited traverse ratio is a ratio of the travel distance in which cutting of the yarn 20 is prohibited (the range indicated by hatching in FIG. 8) to the travel distance of the yarn 10 for one traverse. The prohibition traverse ratio is determined in consideration of an error in estimating the traverse position by the traverse position estimating unit 60 and in consideration of an appropriate margin. Further, taking into consideration that a certain time lag occurs between the time when the cutter operation command signal S3 is output to the cutter 46 and the time when the cutter 46 actually cuts the yarn 20, a travel distance at which the yarn cutting is prohibited at the prohibited traverse ratio. Are offset so that the start and end of the cutting prohibition are slightly advanced.

  Hereinafter, as shown in FIG. 8, the prohibited traverse ratio corresponding to “5 mm from the end face on the small diameter side”, which is expressed as a percentage and is the length of the cutting prohibited traverse range, is calculated to be 45% to 60%. The description will be made on the assumption that the prohibited traverse ratio corresponding to the length of the prohibited traverse range “5 mm from the end face on the large diameter side” is calculated to be 85% to 100% and 0% to 3%.

  4 based on the traverse position signal S6 input from the traverse position estimating unit 60, the current traverse ratio ranges from the prohibited start to the prohibited end (0% to 3%) in the prohibited traverse ratio. %, 45% to 60%, or 85% to 100%). The prohibition judging section 72 outputs the cutting prohibition signal S7 to the cutter operation command section 52 when the current traverse ratio is within the range of the prohibition traverse ratio, and otherwise outputs the cutting permission signal S8 to the cutter operation command section 52. Output to

  Next, a process performed by the traverse position estimating unit 60 and the cutting position adjusting unit 70 of the yarn monitoring device 15 to perform the yarn cutting at an appropriate traveling distance will be described with reference to FIG. FIG. 9 is a flowchart illustrating a process performed by the traverse position estimating unit 60 and the cutting position adjusting unit 70 to adjust the position of the thread cutting.

  First, the prohibition traverse ratio calculation unit 71 included in the cutting position adjustment unit 70, based on the length of the cutting prohibition traverse range set in advance as shown in FIG. 7, causes the yarn 20 to travel during one traverse. Based on the distance (traverse travel distance), a prohibited traverse ratio is calculated, which represents a range of travel distance in which thread cutting is prohibited by a traverse ratio (step S101 in FIG. 9). Thereby, the prohibited traverse ratio (0% to 3%, 45% to 60%, or 85% to 100%) shown in FIG. 8 can be obtained.

  Next, the data smoothing unit 61 included in the traverse position estimating unit 60 calculates the moving average of the yarn speed V acquired from the yarn speed detecting unit 48, and calculates the smoothed yarn as shown in FIG. Data indicating a periodic change in the speed V is created (Step S102 in FIG. 9).

Subsequently, the folding position estimating unit 62 calculates the traveling distance of the yarn 20 at which the yarn speed V has the maximum value as shown in FIG. Is estimated as the traveling distance (turning position) of the yarn 20 when the thread 20 is at the end (the other end) on the large diameter side of the package 30. In addition, as shown in FIG. 5B, the yarn speed V may have a maximum value other than the folding position, but the traveling distance when the traverse position of the yarn 20 is on the large diameter side is obtained in the previous time. Since it can be estimated to some extent in advance based on the turning position and the traverse traveling distance, the maximum value appearing in the vicinity thereof may be used. Even when a plurality of maximum values appear during one stroke, the turning position estimating unit 62 uses the maximum value exceeding a preset or calculated threshold value among the plurality of maximum values. What should I do? That is, the turning position estimating unit 62 may use a local maximum value (a predetermined local maximum value) that satisfies a predetermined condition. Of the folded position folded position estimation unit 62 has estimated, folded position closest to the current thread 20 position is detected as the reference position P _S (step S103 in FIG. 9). Further, the folded position appear before once from the reference position P _S, as well as the reference position P _S, is used as a boundary of the distance interval for immediate traversing travel distance calculating section 64 calculates the nearest traverse traveling distance L (step S104). Specifically, the reference position detection unit 63 in step S103 detects the closest folded position to the current as the reference position P _S. Further, in step S104, the latest traverse travel distance calculating section 64 counts the pulse signal S5 input from the yarn speed detecting section 48 between the two current turning positions closest to the present time, thereby obtaining the latest traverse travel distance L. Is calculated.

  Note that, as described above, the turn-back position estimating unit 62 estimates the turn-back position based on data indicating a periodic change in the yarn speed V after smoothing by the moving average method. Therefore, since the influence of the small irregular fluctuation of the yarn speed V is less likely to be obtained, the turning position can be estimated with high accuracy.

Next, the current traverse ratio calculating unit 65, the travel distance of the yarn 20 from the reference position P _S to the position of the current yarn 20, calculated by counting the pulse signal S5 inputted from the yarn speed detecting section 48 The current traverse ratio shown in FIG. 8 is obtained by dividing the obtained travel distance by the latest traverse travel distance L (step S105 in FIG. 9).

  Subsequently, the prohibition determination unit 72 provided in the cutting position adjustment unit 70 determines that the current traverse ratio obtained in step S105 is the same as the prohibited traverse ratio (0% to 3%, 45) obtained by the prohibited traverse ratio calculation unit 71 in step S101. % To 60%, or 85% to 100%) (step S106). If the current traverse ratio is within the range of the prohibition traverse ratio, a cutting prohibition signal S7 is output to the cutter operation command unit 52 (step S107). Otherwise, a cutting permission signal S8 is output to the cutter operation command unit 52. (Step S108). Thereafter, in any case, the process returns to step S102, and the above processing is repeated.

  As described above, the current traverse ratio substantially indicates the current traverse position, and the prohibited traverse ratio calculation unit 71 converts the length of the cutting prohibited traverse range in FIG. 7 into a traverse ratio. Things. Therefore, it can be said that the above step S106 substantially determines whether or not the estimated current traverse position is within the cutting prohibition traverse range.

  According to the flow shown in FIG. 9, the cutting position adjustment unit 70 changes the signal output to the cutter operation command unit 52 to the cutting inhibition signal S7 in response to the change of the current traverse position estimated by the traverse position estimation unit 60. The process of switching to and from the disconnection permission signal S8 is repeatedly performed in units of one traverse cycle.

  Here, when the yarn defect detection signal S4 accompanying the yarn defect detection unit 47 has detected the yarn defect is input, the cutter operation instruction unit 52 shown in FIG. If it has been input, the cutter operation command signal S3 is immediately output to the drive mechanism of the cutter 46. On the other hand, even when the yarn defect detection signal S4 is input, if the cutting prohibition signal S7 is input from the cutting position adjustment unit 70, the process waits until the cutting permission signal S8 is input from the cutting position adjustment unit 70. Then, the cutter operation command signal S3 is output to the driving mechanism of the cutter 46. Thereby, the running distance of the yarn to be cut by the cutter 46 is adjusted (extended) as necessary, so that the yarn 20 can be cut at a position where there is no risk of falling of the end surface.

  Next, control performed by the unit control unit 50 will be briefly described with reference to FIG. FIG. 10 is a flowchart illustrating a process performed by the unit control unit 50.

  The unit controller 50 normally drives the winding drum 24 to rotate the package 30 in the normal direction, and winds the yarn 20 around the package 30 (Step S201). During that time, the unit control unit 50 monitors whether a signal indicating that the yarn 20 has been cut has been input from the control unit 45 of the yarn monitoring device 15 to the unit control unit 50 (step S202).

  When a signal indicating that the yarn 20 has been cut due to the yarn monitoring device 15 detecting the yarn defect is input from the yarn monitoring device 15, the unit control unit 50 detects the yarn defect wound around the package 30. In order to pull out the area including the area, the drum driving motor 53 is controlled to rotate the winding drum 24 in the reverse direction (step S203). Here, the control unit 45 of the yarn monitoring device 15 operates the cutter operation commanding unit 52 to operate the cutter 46 from the position of the yarn 20 when the yarn defect detection unit 47 detects the defect of the yarn 20, and the yarn 20 is cut. The running distance of the yarn 20 to the position of the yarn 20 at the time of the execution is calculated, for example, by counting the pulse signal S5 output from the yarn speed detecting unit 48, and is output to the unit control unit 50. In step S203, the unit control unit 50 reverses the package 30 until the yarn 20 having a length obtained by adding an appropriate margin to the length calculated as described above is unwound from the package 30. At this time, the unit control unit 50 obtains the rotation angle of the winding drum 24 from the rotation sensor 42 and calculates the length of the yarn 20, thereby obtaining a yarn having a sufficient length including the detected yarn defect. The reverse rotation of the winding drum 24 is monitored to ensure that the package 20 is unwound from the package 30.

  When the yarn 20 is pulled out beyond a length that can remove the yarn defect, the unit control unit 50 controls the drum drive motor 53 to stop, and connects the upper yarn and the lower yarn by the yarn joining device 14 ( Step S204). The region including the above-mentioned yarn defect in the drawn upper yarn is removed as waste yarn in the process of splicing by the yarn splicing device 14. Thereafter, the process returns to step S201, and winding of the yarn 20 is restarted.

  In the winder unit 10 of the present embodiment, when the yarn monitoring device 15 detects a yarn defect, and when the operation of the cutter 46 is delayed to prevent the end surface from falling, the cutting of the yarn 20 is delayed by an amount corresponding to the delay. The yarn 20 will be additionally wound on the package 30. In this regard, according to the control of FIG. 10, after the yarn 20 having a sufficient length including the additionally wound portion is unwound by the reverse rotation of the package 30, the yarn splicing device 14 The operation is performed. Therefore, the yarn defect can be reliably removed and the yarn splicing can be performed.

  As described above, the cutting control unit 49 included in the yarn monitoring device 15 in the present embodiment controls the operation of the cutter 46 that cuts the yarn 20 wound around the package 30 while being traversed. The cutting control unit 49 includes a yarn speed detecting unit 48, a traverse position estimating unit 60, and a cutting position adjusting unit 70. The yarn speed detector 48 detects a yarn speed V at which the yarn 20 travels. The traverse position estimating unit 60 estimates the traverse position of the yarn 20 based on the yarn speed V detected by the yarn speed detecting unit 48. The cutting position adjusting unit 70 adjusts the cutting position at which the cutter 46 cuts the yarn 20 according to the traverse position of the yarn 20 estimated by the traverse position estimating unit 60.

  By adjusting the position where the yarn 20 is cut by operating the cutter 46 in accordance with the traverse position of the yarn 20, the yarn 20 is not cut at a position where the end surface of the yarn 20 may be dropped. This can prevent the end surface of the yarn 20 from dropping. Further, since the traverse position estimating unit 60 estimates the traverse position of the yarn 20 based on the yarn speed V detected by the yarn speed detecting unit 48, compared with the case where a sensor for directly detecting the traverse position of the yarn is provided, The configuration can be simplified.

  Further, in the cutting control unit 49 of the present embodiment, when the traverse position of the yarn 20 is at the end of the traverse region of the package 30, the cutting position adjustment unit 70 moves the traverse position to the center side of the traverse region. The travel distance of the yarn 20 when operating the cutter 46 is adjusted so that the cutter 46 operates later.

  This makes it possible to prevent the end surface of the yarn 20 from dropping with a simple control that increases the travel distance of the yarn 20 when operating the cutter 46.

  In the cutting control unit 49 of the present embodiment, the traverse position estimating unit 60 estimates the traverse position based on the characteristic of the yarn speed V detected by the yarn speed detecting unit 48.

  This makes it possible to adjust the cutting position for cutting the yarn 20 to an appropriate position with a simple configuration as compared with a case where the traverse position is directly detected by a position sensor or the like disposed in the traverse area.

  In the present embodiment, the package 30 formed by winding the yarn 20 by the winder unit 10 has a cone shape whose diameter increases from one axial end to the other end. The traverse position estimating unit 60 included in the cutting control unit 49 determines the traveling distance of the yarn 20 when an extreme value (maximum value) appears in the process of periodically increasing and decreasing the yarn speed V detected by the yarn speed detecting unit 48. Is used to estimate the traverse position.

  This makes it possible to appropriately estimate the traverse position by utilizing the fact that the yarn speed V periodically increases and decreases when winding the yarn 20 to form the cone-shaped package 30.

  In the cutting control unit 49 of the present embodiment, the traverse position estimating unit 60 includes a data smoothing unit 61 for smoothing data indicating a periodic change in the yarn speed V detected by the yarn speed detecting unit 48. The traverse position estimating unit 60 performs the traverse based on the travel distance of the yarn 20 when an extreme value (maximum value) appears in the process of periodically increasing and decreasing the yarn speed V after smoothing by the data smoothing unit 61. Estimate the position.

  As a result, errors due to small irregular fluctuations occurring in the yarn speed V can be suppressed, so that the traverse position can be accurately estimated.

  Further, in the cutting control unit 49 of the present embodiment, the data smoothing unit 61 smoothes data indicating a periodic change in the yarn speed V by a moving average method.

  Thus, by appropriately determining the moving average score, it is possible to appropriately grasp the increasing / decreasing tendency of the yarn speed V appearing according to the traverse position while suppressing errors due to fine irregular fluctuations occurring in the yarn speed V. it can. As a result, the traverse position can be accurately estimated. Further, the yarn speed V can be smoothed by a simple calculation.

  In the cutting control unit 49 of the present embodiment, the traverse position estimating unit 60 is based on the travel distance (the latest traverse travel distance L) between at least two latest timings at which the maximum value of the yarn speed V appears. Thus, the traverse position of the yarn 20 is estimated.

  Accordingly, the traverse position of the yarn 20 can be appropriately estimated based on the traveling distance of the yarn 20. Further, by using the running distance of the yarn 20 when the local maximum value appears in the yarn speed V as a reference, the cycle of increase and decrease of the yarn speed V can be easily and clearly grasped, and one cycle of increase and decrease of the yarn speed V (traverse It is possible to accurately obtain the travel distance of the yarn corresponding to one time). Further, the travel distance of the yarn 20 corresponding to one traverse may change as the diameter of the package 30 increases. According to the present embodiment, for example, the yarn 20 in one cycle of the increase and decrease of the latest yarn speed V Since the traverse position of the yarn 20 is estimated based on the travel distance (the nearest traverse travel distance L), the estimation accuracy of the traverse position can be stabilized.

  Further, the cutting control unit 49 of the present embodiment determines whether or not the cutter 46 can be operated based on the traverse position of the yarn 20 estimated by the traverse position estimating unit 60, and notifies the cutter operation command unit 52 of the operation of the cutter 46 or A prohibition determination unit 72 that outputs a command signal for commanding non-operation is provided. The prohibition determination unit 72 determines the travel distance of the yarn 20 (the latest traverse travel distance L) detected during the last one cycle in which the yarn speed V increases and decreases and the yarn 20 when the maximum value of the yarn speed V appears. Based on the travel distance, a prohibited range (0% to 3%, 45% to 60%, 85% to 100%) indicating a range in which the thread cutting is prohibited in one cycle of the traverse; It is determined whether the cutter 46 can be operated based on the travel distance of the yarn 20 detected from the travel position (reference position) of the latest yarn at which the maximum value of the speed V appears to the present time.

  Thereby, the travel distance of the yarn 20 from the travel position of the yarn 20 at the time when the maximum value of the yarn speed V appears to the present time is detected, and the travel distance is determined to be the travel in which the yarn cutting is prohibited in the prohibited range. By examining whether or not the distance falls within the range, it is possible to appropriately and easily determine whether or not the operation of the cutter 46 is to be performed, thereby preventing the end face of the thread 20 from dropping. Furthermore, the travel distance of the yarn 20 corresponding to one traverse changes as the diameter of the package 30 increases, but in the present embodiment, the travel distance of the yarn 20 in the latest one cycle in which the yarn speed V increases or decreases (the latest travel distance) Since the operation of the cutter 46 is determined based on the traverse travel distance L), the end face of the yarn 20 can be stably prevented from falling off without being affected by an increase in the diameter of the package 30.

  In addition, the cutting control unit 49 of the present embodiment is configured to be able to change the length (see FIG. 7) of the cutting prohibition traverse range which is the range where the thread cutting is prohibited at the end of the traverse area of the package 30. . When the yarn defect detection signal S4 is input and the traverse position estimated by the traverse position estimating unit 60 is within the cutting prohibition traverse range, the cutting position adjusting unit 70 moves the traverse position of the yarn 20. The travel distance of the yarn 20 when the cutter 46 is operated is adjusted so that the cutter 46 operates after being out of the cutting prohibition traverse range.

  Accordingly, the yarn 20 is cut by operating the cutter 46 after delaying (running the yarn 20) until the traverse position of the yarn 20 moves to a position outside the cutting prohibition traverse range. It can be reliably prevented. Further, since the length of the cutting prohibition traverse range can be changed by software, the operator can appropriately change the length of the cutting prohibition traverse range in consideration of the physical properties of the yarn 20 and the like. Can be improved.

  In addition, the yarn monitoring device 15 of the present embodiment includes the above-described cutting control unit 49 and further includes a yarn defect detection unit 47 that detects a defect of the yarn 20. When detecting a defect in the yarn 20, the yarn defect detection unit 47 outputs a yarn defect detection signal S <b> 4 as an operation signal of the cutter 46 to the cutting control unit 49.

  Accordingly, when the yarn defect detection unit 47 detects a defect of the yarn 20, the yarn 20 can be cut by the cutter 46 at a travel distance of the yarn 20 adjusted so that the end surface of the yarn 20 does not drop. .

  Further, the yarn monitoring device 15 of the present embodiment includes a cutting device (the cutter 46 in the present embodiment).

  Accordingly, the exchange of control signals from the detection of the defect of the yarn 20 to the activation of the cutter 46 can be easily completed in the yarn monitoring device 15, so that the configuration can be simplified.

  In the yarn monitoring device 15 of the present embodiment, the cutting device is the cutter 46.

  Thereby, the yarn 20 can be cut with a simple configuration.

  In addition, the winder unit 10 of the present embodiment includes the yarn monitoring device 15 described above, and also includes the yarn supply unit 28 and the package forming unit 31. The yarn supplying section 28 supports the yarn supplying bobbin 21. The package forming section 31 winds the yarn 20 of the yarn supplying bobbin 21 of the yarn supplying section 28 to form the package 30. The yarn monitoring device 15 is disposed between the yarn supply unit 28 and the package forming unit 31.

  Accordingly, it is possible to provide the winder unit 10 having a simple configuration in which the end surface of the yarn 20 is not easily dropped.

  Further, the winder unit 10 of the present embodiment includes the winding drum 24, the yarn joining device 14, and a unit control unit 50. The winding drum 24 contacts the package 30 and rotates the package 30 to wind the yarn 20 from the yarn supplying section 28 into the package 30. When the cutter 46 is operated and the yarn 20 is cut, the yarn splicing device 14 performs a yarn splicing operation to join the yarn 20 from the yarn supply unit 28 and the yarn 20 from the package forming unit 31. The control unit 45 controls the winder unit 10. The control unit 45 controls the yarn 20 over a length equal to or longer than the travel distance of the yarn 20 from the position of the yarn 20 when the defect of the yarn 20 is detected by the yarn defect detection unit 47 to the position where the cutter 46 is operated and cut. Until the package 30 is pulled out, the winding drum 24 is controlled to reverse the package 30, and then the yarn joining device 14 performs the yarn joining operation.

  That is, in the winder unit 10 including the above-described yarn monitoring device 15, even when the yarn defect detection unit 47 detects a defect of the yarn 20, the operation timing of the cutter 46 may be delayed in order to prevent the end surface from dropping. In this regard, according to the configuration of the present embodiment, even when the yarn 20 is additionally wound on the package 30 by the delay of the operation of the cutter 46, the yarn 20 having a sufficient length including the additional portion is taken up. The yarn splicing device 14 performs the yarn splicing operation after the yarn has been pulled out of the package 30, so that the defect of the yarn 20 detected by the yarn defect detection unit 47 can be reliably removed.

  Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

  In the above-described embodiment, the folding position estimating unit 62 determines the traverse position of the yarn 20 when the yarn speed V reaches the maximum value in the data of the yarn speed V. (The other end). However, instead of this, the fold position estimating unit 62 sets the traverse position of the yarn 20 to the small-diameter end (the one end) of the package 30 based on the travel distance of the yarn 20 when the yarn speed V becomes the minimum value. It may be estimated that there is. In this case, the latest traverse travel distance L is determined by counting the pulse signal S5 input from the yarn speed detection unit 48 during at least the two latest travel positions of the yarn 20 where the minimum value of the yarn speed V appears. Can be obtained by Note that a plurality of local minimum values may appear during one traverse stroke. In such a case, the turning position estimating unit 62 satisfies a predetermined condition among the local minimum values. A minimum value (predetermined minimum value) may be used.

  In the above-described embodiment, the cutting prohibition traverse range in which the thread cutting by the cutter 46 is prohibited is configured to be changeable by the operator using the cutting prohibition traverse range setting unit. However, the cutting prohibition traverse range may not be changeable. Alternatively, instead of this, the cutting prohibition traverse range may be configured to be automatically changeable according to the winding conditions of the yarn 20, the yarn speed V, the physical properties of the yarn 20, the type of yarn defect, and the like.

  When the irregular fluctuation occurring in the yarn speed V detected by the yarn speed detection unit 48 is small, the data smoothing unit 61 can be omitted.

  In the above embodiment, the package 30 has a cone shape. However, the shape of the package is not necessarily limited to this. For example, the shape of the package may be a cheese shape instead. In this case, the traverse position estimating unit 60 detects, for example, the tendency of the yarn speed change in one traverse caused by the configuration of the traverse groove formed in the winding drum driving the cheese-shaped package. Thus, the traverse position can be estimated.

  In the above-described embodiment, the package 30 is driven to rotate and the yarn 20 is wound by the package 30 being brought into contact with the winding drum 24 that is driven to rotate. However, the manner in which the yarn 20 is wound around the package 30 is not limited to this. For example, instead of this, the package may be directly driven by a motor. Instead of traversing the yarn 20 by the traverse groove 27 of the winding drum 24, the yarn may be traversed by reciprocatingly driving the traverse guide.

  The adjustment of the operating position of the cutter 46 is not limited to the yarn cutting caused by the yarn defect detection unit 47 detecting the yarn defect. Can be applied to various kinds of yarn cutting, such as when cutting with a cutter 46.

  In the above embodiment, as shown in FIG. 2, the left-right width (width in the longitudinal direction) of the suction mouth 34 is configured to be substantially the same as the left-right width (width of the outer peripheral surface) of the package 30. However, instead of this, the width in the longitudinal direction of the suction mouth (the suction port thereof) may be configured to be smaller than the width of the outer peripheral surface of the package. In this case, it is desirable to set the cutting prohibition traverse range so that the width of the area where the thread cutting is permitted in the traverse width is substantially the same as the width in the longitudinal direction of the suction mouth. Specifically, for example, when the width of the suction mouth in the longitudinal direction is 3 inches and the width (traverse width) of the outer peripheral surface of the package 30 is 6 inches, 1.5 inches (approximately) from each of both ends. The length up to 38 mm) is set as the cutting prohibition traverse range. With this configuration, even when the width of the suction mouth (the suction port thereof) in the longitudinal direction is small, the yarn end can be suctioned and captured in a short knotting time. When the suction mouth (suction port) is configured to have a narrow width in the longitudinal direction, there is an advantage that the energy (negative pressure) required for suctioning and capturing the upper thread by the suction mouth can be reduced.

  In the above embodiment, the cutter 46 is provided in the yarn monitoring device 15. However, the present invention is not limited to this, and the cutter may be provided separately from the yarn monitoring device.

  In the above embodiment, the cutter is the cutter 46. However, the present invention is not limited to this, as long as one yarn 20 can be separated into two.

  In the above embodiment, the cutting position adjustment unit 70 outputs either the cutting permission signal S8 or the cutting prohibition signal S7 to the cutter operation command unit 52. However, the present invention is not limited to this. Instead, only the cutting permission signal S8 may be output, and the cutter operation command unit 52 may determine that cutting is prohibited while the cutting permission signal S8 is not output.

  In the above embodiment, the yarn 20 is traversed by the rotation of the winding drum 24. However, the present invention is not limited to this. For example, instead of this, the yarn 20 is traversed by a traverse arm. It may be a thing. In that case, irregular fluctuations in the yarn speed V are reduced, and in some cases, data smoothing can be omitted.

  The yarn speed V may be detected at a location other than the yarn monitoring device 15.

  In the above-described embodiment, after calculating the traverse ratio, the prohibition range in which the cutting of the yarn 20 is prohibited in the traverse ratio is set. However, the present invention is not limited to this, and the travel distance of the yarn 20 where cutting of the yarn 20 is prohibited may be directly obtained as the prohibited range without obtaining the traverse ratio.

  In the above-described embodiment, the control is performed based on the traveling distance of the yarn 20, and the yarn 20 is cut at the traveling distance where the end surface drop hardly occurs. Such control has an advantage in that it is not necessary to consider a change in the yarn speed V. However, instead of this, the control may be performed based on the cutting timing of the yarn 20, and the yarn 20 may be cut at a timing at which the end face drop hardly occurs.

  The traverse traveling distance may be calculated by calculating the traveling distance between each of the three or more traveling positions of the yarn 20 immediately after the local maximum value of the yarn speed V has appeared, and taking an average of these distances. Alternatively, the distance may be calculated by calculating the running distance between each of the three or more running positions of the yarn 20 at the most recent time when the minimum value of the yarn speed V has appeared, and taking the average thereof.

15 Thread monitoring device 20 Thread 30 Package 46 Cutter 47 Thread defect detecting unit 48 Thread speed detecting unit 52 Cutter operation command unit (Cutting device operation command unit)
60 Traverse position estimating unit 70 Cutting timing adjusting unit

Claims (14)

In a yarn cutting control device that controls the operation of a cutting device that cuts a yarn wound on a package while being traversed,
A yarn speed detection unit that detects a yarn speed at which the yarn travels;
A traverse position estimation unit that estimates a traverse position of the yarn based on the yarn speed detected by the yarn speed detection unit;
A cutting position adjustment unit that adjusts a cutting position at which the cutting device cuts the yarn, according to the traverse position of the yarn estimated by the traverse position estimation unit;
A yarn cutting control device comprising: The yarn cutting control device according to claim 1,
When the traverse position of the yarn is at the end of the traverse region of the package, the cutting position adjustment unit operates the cutting device so that the cutting device operates after the traverse position moves to the center of the traverse region. A yarn cutting control device for adjusting a traveling distance of a yarn when operating the device. The yarn cutting control device according to claim 1 or 2,
The yarn cutting control device, wherein the traverse position estimating unit estimates the traverse position based on a characteristic of the yarn speed detected by the yarn speed detecting unit. The yarn cutting control device according to claim 1 or 2,
The package has a cone shape whose diameter increases from one end in the axial direction to the other end,
The traverse position estimating unit estimates the traverse position based on a running distance of a yarn when an extreme value appears in a process of periodically increasing and decreasing the yarn speed detected by the yarn speed detecting unit. And a thread cutting control device. The yarn cutting control device according to claim 4,
The traverse position estimation unit includes a yarn speed smoothing unit that smoothes data indicating a periodic change in the yarn speed detected by the yarn speed detection unit,
The traverse position estimating unit estimates the traverse position based on a running distance of a yarn when an extreme value appears in a process where the yarn speed after smoothing by the yarn speed smoothing unit periodically increases and decreases. A yarn cutting control device characterized by the above-mentioned. The yarn cutting control device according to claim 5,
The yarn cutting control device, wherein the yarn speed smoothing unit smoothes data indicating a periodic change in the yarn speed by a moving average method. The yarn cutting control device according to any one of claims 4 to 6,
The traverse position estimating unit is configured to determine a traveling distance between traveling positions of at least two most recent yarns at which the maximum value of the yarn speed appears, or at least two latest yarns at which the minimum value of the yarn speed appears. A thread traverse position of the thread based on a travel distance between the travel positions. The yarn cutting control device according to claim 7, wherein
Prohibition of determining whether or not the cutting device can be operated based on the traverse position of the yarn estimated by the traverse position estimating unit and outputting a signal for instructing the cutting device operation or non-operation to the cutting device operation command unit. Equipped with a judgment unit,
The prohibition determination unit includes:
A traverse travel distance that is a travel distance of the yarn detected during the last one cycle in which the yarn speed increases and decreases;
A prohibition range representing a range in which the yarn cutting is prohibited in one cycle of the traverse, with reference to the traveling distance of the yarn when the maximum value or the minimum value of the yarn speed appears;
The running distance of the yarn detected between the current running position of the yarn where the maximum value or the minimum value of the yarn speed has appeared and the present time,
And determining whether or not the cutting device can be operated based on the following. The yarn cutting control device according to any one of claims 1 to 8,
It is configured to be able to change the length of the cutting prohibition traverse range which is a range for prohibiting thread cutting at the end of the traverse area of the package,
The cutting position adjustment unit is configured to, when a yarn cutting signal requesting the cutting of the yarn is input to the yarn cutting control device, when the traverse position estimated by the traverse position estimation unit is within the cutting prohibition traverse range. Adjusting the travel distance of the yarn when the cutting device is operated so that the cutting device is operated after the traverse position of the yarn is moved and deviates from the cutting prohibited traverse range. Cutting control device. A yarn monitoring device comprising the yarn cutting control device according to any one of claims 1 to 9,
The apparatus further includes a yarn defect detection unit that detects a defect of the yarn,
The yarn monitoring device according to claim 1, wherein the yarn defect detection unit outputs a yarn defect detection signal as a yarn cutting signal for requesting cutting of the yarn to the yarn cutting control device when detecting the yarn defect. The yarn monitoring device according to claim 10, wherein
A yarn monitoring device comprising the cutting device. The yarn monitoring device according to claim 11, wherein
A yarn monitoring device according to claim 1, wherein said cutting device is a cutter. A yarn winding device comprising the yarn monitoring device according to any one of claims 10 to 12,
A yarn supplying section on which the yarn supplying bobbin is supported;
A package forming unit configured to wind the yarn of the yarn supplying bobbin of the yarn supplying unit to form the package;
With
The yarn winding device, wherein the yarn monitoring device is disposed between the yarn supplying unit and the package forming unit. The yarn winding device according to claim 13,
A winding drum that rotates the package in contact with the package to wind the yarn from the yarn supply unit into the package;
A yarn splicing device that performs a yarn splicing operation to join the yarn from the yarn supply unit and the yarn from the package forming unit when the cutting device is operated to cut the yarn;
A control unit that controls the yarn winding device;
With
The controller controls the yarn over a length equal to or longer than a travel distance of the yarn from a position of the yarn when the yarn defect is detected by the yarn defect detection unit to a position where the cutting device is operated to cut the yarn. A yarn winding device, wherein the winding drum is controlled to reverse the package until it is pulled out of the package, and then the yarn joining device is caused to perform the yarn joining operation.

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