Yarn winder

Abstract

To keep an amount of yarn wound around a package constant even when a yarn speed during formation of the package differs.SOLUTION: A winder unit 2 includes a yarn feeding part 6, a package formation part 8, and a controller 25. The yarn feeding part 6 supplies yarn Y. The package formation part 8 winds the yarn Y to form a package 30. The controller 25 controls the package formation part 8. The controller 25 executes, with respect to the package formation part 8, deceleration stop control in which a yarn speed of the yarn Y is decelerated from a yarn speed during formation of the package 30 and is reduced to zero when a length of the yarn Y wound around the package 30 reaches a package winding completion length. In this case, a start timing of the deceleration stop control is determined based on the package winding completion length, the yarn speed during formation of the package 30, and the length of the yarn Y wound around the package 30.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a yarn winding device that winds a yarn to form a package. [Background technology]

[0002] There is known a yarn winding device that winds a yarn supplied from a yarn supplying unit onto a winding tube to form a package. The yarn winding device is required to prevent the amount of yarn wound onto the package from varying from a predetermined amount when winding of the yarn onto the package is completed. Therefore, the device starts decelerating the package when the amount of yarn wound onto the package becomes slightly smaller than the predetermined amount (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-286646 Summary of the Invention [Problem to be solved by the invention]

[0004] In a yarn winding device, the yarn speed may be changed while a package is being formed depending on the winding conditions. In this case, if the timing for decelerating the package is determined taking into account only the amount of yarn wound onto the package, as described above, variations in the amount of yarn wound onto the package at the end of winding will occur. Specifically, the amount of yarn wound onto the package at the end of winding will differ depending on the yarn speed immediately before decelerating the package.

[0005] An object of the present invention is to keep the amount of yarn wound onto a package constant at the end of winding, even when the yarn speed during winding of the yarn onto a package is changed. [Means for solving the problem]

[0006] Below, several aspects will be described as means for solving the problems. These aspects can be arbitrarily combined as necessary. A yarn winding device according to one aspect of the present invention includes a yarn supplying unit, a winding unit, and a control unit. The yarn supplying unit supplies the yarn. The winding unit winds the yarn to form a package. The control unit controls the winding unit. The control unit executes deceleration and stop control on the winding unit. The deceleration and stop control decelerates the yarn speed, which is the running speed of the yarn, from the yarn speed during package formation and sets it to 0 when the length of the yarn wound onto the package reaches a predetermined package winding completion length. In this case, the start timing of the deceleration and stop control is determined based on the package winding completion length, the yarn speed during package formation, and the length of the yarn wound onto the package.

[0007] In a yarn winding device that completes winding of yarn onto a package using the above-described deceleration and stop control, the timing for starting the deceleration and stop control is determined based not only on the length of yarn wound onto the package but also on the yarn speed during package formation, i.e., the yarn speed immediately before the start of the deceleration and stop control. This makes it possible to keep the amount of yarn wound onto the package at the end of winding approximately constant at the completed package winding length, even if the yarn speed during package formation differs.

[0008] In the above-described yarn winding device, the yarn deceleration rate in the deceleration / stop control may be set in advance. This allows the time required for the yarn speed to be reduced from the speed immediately before the start of the deceleration / stop control to zero to be known, thereby enabling the start timing of the deceleration / stop control to be accurately determined.

[0009] In the above-described yarn winding device, the deceleration rate of the yarn during the deceleration and stop control may be changeable, thereby enabling more flexible setting of package formation conditions.

[0010] In the above-described yarn winding device, the winding unit may include a rotary drive unit that rotates the package. In this case, the control unit may measure the length of the yarn wound onto the package based on the amount of drive of the rotary drive unit. This eliminates the need for a sensor that can directly measure the length of the wound yarn.

[0011] In the above-described yarn winding device, the winding unit may further include a brake device that slows down the rotational speed of the package. In this case, the control unit may perform deceleration and stop control by combining the deceleration of the package by the brake device and the deceleration of the rotary drive unit. This makes it possible to stop the rotation of the package in a short time while suppressing slippage between the package and the rotary drive unit.

[0012] Furthermore, when the brake device decelerates the package and the rotary drive unit decelerates the package, the package comes into contact with the rotary drive unit and the yarn is connected when the deceleration and stop control ends. That is, when the deceleration and stop control ends, the package is not lifted up to separate it from the rotary drive unit, but by determining the start timing of the deceleration and stop control as described above, the amount of yarn wound onto the package at the end of winding can be kept substantially constant at the completed package winding length even without lifting up.

[0013] The yarn winding device may further include a storage roller. The storage roller is provided between the yarn supplying unit and the winding unit in the yarn running direction, and winds and temporarily stores the yarn. In this case, the control unit may measure the length of the yarn wound into the package based on the number of rotations of the storage roller. This allows the length of the yarn wound into the package to be accurately measured regardless of the shape of the package.

[0014] The yarn winding device may further include a yarn amount detection sensor. The yarn amount detection sensor detects when the amount of yarn stored on the storage roller reaches a predetermined amount. In this case, the control unit may measure the length of the yarn wound into the package based on the number of rotations of the storage roller after the yarn amount detection sensor detects that the amount of yarn stored on the storage roller has reached the predetermined amount. When package formation begins (restarts), the amount of yarn stored on the storage roller is unknown (varies), so the yarn length measured based on the number of rotations of the storage roller from the start of formation will be inaccurate. Therefore, as described above, by measuring the yarn length based on the number of rotations of the storage roller after the amount of yarn stored on the storage roller reaches the predetermined amount, the yarn length can be measured more accurately.

[0015] In the above-described yarn winding device, when package formation starts, the control unit may set the speed at which the yarn is wound onto the package to be slower than the speed at which the yarn is stored onto the storage roller. This shortens the time from when package formation starts until a predetermined amount of yarn is stored on the storage roller, thereby accelerating the timing at which measurement of the yarn length based on the number of rotations of the storage roller starts.

[0016] In the above-described yarn winding device, the control unit may calculate a deceleration stop yarn length, which is the yarn length of the yarn wound onto the package from the start to the end of the deceleration stop control, based on the yarn speed during package formation, and determine the start timing of the deceleration stop control when the length of the yarn wound onto the package becomes a deceleration start yarn length obtained by subtracting the deceleration stop yarn length from the package winding completion length. This makes it possible to accurately determine the start timing of the deceleration stop control based on the package winding completion length, the yarn speed during package formation, and the yarn length wound onto the package.

[0017] In the above-described yarn winding device, the yarn length at which deceleration stops may change linearly with respect to the yarn speed during package formation, thereby making it possible to easily calculate the yarn length at which deceleration stops. [Effects of the Invention]

[0018] Even if the yarn speed during package formation varies, the amount of yarn wound onto the package at the end of winding can be kept substantially constant at the completed package winding length. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 2 is a diagram showing the configuration of an automatic winder. [Figure 2] FIG. 2 is a diagram showing the configuration of a winder unit. [Figure 3] FIG. 2 is a diagram showing the configuration of a package forming unit. [Figure 4] FIG. [Figure 5] FIG. 2 is a diagram showing the control configuration of a control device. [Figure 6] 10 is a flowchart showing a package forming operation using a winder unit. [Figure 7] 10A and 10B are diagrams showing an example of a change in the winding length of a yarn over time when the yarn speed is different. [Figure 8] FIG. 10 is a diagram showing an example of a change in yarn speed over time when package formation is completed after multiple stages of deceleration. DETAILED DESCRIPTION OF THE INVENTION

[0020] 1. First embodiment (1) Automatic winder The first embodiment will be described in detail below. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicate explanations will be omitted. "Upstream" and "downstream" mean upstream and downstream, respectively, in the running direction of the yarn.

[0021] The automatic winder 1 will be described with reference to Fig. 1. Fig. 1 is a diagram showing the configuration of the automatic winder 1. The automatic winder 1 includes a plurality of winder units 2 arranged side by side, a machine control device 3, a yarn supplying bobbin supply device 4, and a doffing device 5. The automatic winder 1 is also provided with a blower box.

[0022] The winder unit 2 winds the yarn Y onto the winding bobbin 22 to form a package 30. The winder unit 2 unwinds the yarn Y from the yarn supply bobbin 21, temporarily stores the unwound yarn Y in the yarn storage device 40, and then pulls out the yarn Y stored in the yarn storage device 40 and winds it onto the winding bobbin 22 to form the package 30.

[0023] The machine control device 3 is configured to be able to communicate with each winder unit 2. An operator of the automatic winder 1 can centrally manage the multiple winder units 2 by appropriately operating the machine control device 3. The machine control device 3 controls the operations of the yarn supplying bobbin supply device 4 and the doffing device 5.

[0024] The yarn supplying bobbin supply device 4 sets the yarn supplying bobbins 21 one by one on the conveying tray 26. The yarn supplying bobbin supply device 4 supplies the yarn supplying bobbins 21 set on the conveying tray 26 to each of the plurality of winder units 2.

[0025] When the package 30 in the winder unit 2 becomes full (a specified amount of yarn Y has been wound), the doffing device 5 travels to the position of the winder unit 2 and removes the full package 30. The doffing device 5 sets a winding bobbin 22 on which the yarn Y is not wound to the winder unit 2 from which the package 30 has been removed.

[0026] (2) Winder unit (2-1) Outline of the winder unit The configuration of the winder unit 2 will be described below. First, the schematic configuration of the winder unit 2 will be described using Fig. 2. Fig. 2 is a diagram showing the configuration of the winder unit 2. The winder unit 2 includes a yarn supplying section 6, a yarn pooling device 40, a yarn guiding section 7, a package forming section 8, and a control device 25.

[0027] The yarn supplying unit 6 is configured to support the yarn supplying bobbin 21 set on the transport tray 26 at a predetermined position and to unwind the yarn Y from the yarn supplying bobbin 21. When all of the yarn Y has been unwound from the yarn supplying bobbin 21, the yarn supplying unit 6 ejects the core tube of the yarn supplying bobbin 21 on which the yarn Y is not wound, and receives a new yarn supplying bobbin 21 from the yarn supplying bobbin supply device 4.

[0028] The yarn pooling device 40 is disposed in the middle of the yarn traveling path formed between the yarn supplying unit 6 and the package forming unit 8. The yarn pooling device 40 is provided at a position upstream of the wax application device 70 in the traveling direction of the yarn Y. The yarn pooling device 40 winds and temporarily stores the yarn Y unwound in the yarn supplying unit 6. The yarn pooling device 40 supplies the stored yarn Y to the package forming unit 8.

[0029] The yarn guiding unit 7 is disposed between the yarn supplying unit 6 and the yarn storage device 40, and guides the yarn Y supplied from the yarn supplying unit 6 between the yarn supplying unit 6 and the yarn storage device 40. When the yarn Y is broken between the yarn supplying unit 6 and the yarn storage device 40, the yarn guiding unit 7 splices the end of the yarn Y present on the yarn supplying unit 6 side and the end of the yarn Y present on the yarn storage device 40 side.

[0030] The package forming unit 8 winds the yarn Y supplied from the yarn storage device 40 onto the winding bobbin 22 to form a package 30.

[0031] The control device 25 is a computer system equipped with hardware such as an information processing circuit such as a CPU, a storage device (ROM, RAM, etc.), and various interfaces. The storage device stores software such as a control program. The control device 25 controls each component of the winder unit 2 through cooperation between the hardware and software. The control device 25 is configured to be able to communicate with the main control device 3. This allows the main control device 3 to centrally manage the operations of the multiple winder units 2 equipped in the automatic winder 1.

[0032] The winder unit 2 may include a wax applicator 70. The wax applicator 70 is disposed between the yarn accumulating device 40 and the package forming unit 8. The wax applicator 70 applies wax to the yarn Y traveling from the yarn accumulating device 40 toward the package forming unit 8.

[0033] (2-2) Package forming section The package forming unit 8 will be described below with reference to Fig. 3. Fig. 3 is a diagram showing the configuration of the package forming unit 8. The package forming unit 8 has a cradle 23 and a traverse drum 24. The cradle 23 rotatably supports the winding bobbin 22 (or the package 30). The cradle 23 is configured so that the outer peripheral surface of the supported package 30 can be brought into contact with or separated from the outer peripheral surface of the traverse drum 24.

[0034] The cradle 23 has a pair of cradle arms 23a and 23b. The cradle arms 23a and 23b are supported rotatably about an axis A1, and rotate in a direction approaching or moving away from the traverse drum 24.

[0035] Bobbin holders 23c and 23d are attached to the tips of cradle arms 23a and 23b to rotatably hold winding bobbin 22. Bobbin holders 23c and 23d have holder bodies 23e and 23f, respectively, that fit onto ends of winding bobbin 22 in the rotation axis direction. Holder bodies 23e and 23f fit onto both ends of winding bobbin 22 and rotate integrally with winding bobbin 22.

[0036] The bobbin holder 23c has a built-in brake device 60. The brake device 60 has a brake shoe that moves toward or away from the holder main body 23e. The brake shoe is movable by the air pressure supplied by the air pressure variable unit 60a. Specifically, when the air pressure by the air pressure variable unit 60a is increased, the brake shoe comes into contact with the holder main body 23e and acts as a brake against the rotation of the winding bobbin 22 (package 30). The deceleration of the rotational speed of the winding bobbin 22 (package 30) can be adjusted by the air pressure by the air pressure variable unit 60a.

[0037] A package rotation speed sensor 61 is disposed near the bobbin holder 23d, and detects the number of rotations of the package 30 and outputs the detected number to the control device 25.

[0038] The traverse drum 24 is driven to rotate by a drum drive motor 62. When the traverse drum 24 rotates while the package 30 is in contact with the traverse drum 24, the winding bobbin 22 and the package 30 are rotated accordingly. The drum drive motor 62 is a position-controllable motor such as a DC brushless motor, a stepping motor, or a servo motor.

[0039] A drum rotation speed sensor 63 is disposed near the traverse drum 24. The drum rotation speed sensor 63 detects the rotation speed of the traverse drum 24 and outputs it to the control device 25. The rotation speed of the traverse drum 24 may be measured by a sensor (for example, an encoder) that measures the rotation speed of the drum drive motor 62.

[0040] A traverse groove 24a is formed on the outer peripheral surface of the traverse drum 24. The traverse drum 24 rotates while passing the yarn Y through the traverse groove 24a, thereby traversing the yarn Y at a predetermined width. With the above configuration, the yarn Y can be wound around the winding bobbin 22 while traversing, thereby forming a package 30 of a predetermined shape.

[0041] (2-3) Yarn storage device The detailed configuration of the yarn pooling device 40 will be described using Figures 2 and 4. Figure 4 is an enlarged view of the pooling roller 41. The yarn pooling device 40 includes the pooling roller 41 onto which the yarn Y can be wound, and a drive motor 45 that drives the pooling roller 41 to rotate.

[0042] The storage roller 41 has a drum shape and temporarily stores the yarn Y by winding it around a storage area A on its outer circumferential surface 41d. The storage roller 41 is rotatably supported on a frame of the automatic winder 1 around a rotation axis C1 that is slightly tilted relative to the horizontal. As shown in FIGS. 2 and 4, tapered portions 41a and 41b are formed on both axial ends of the storage roller 41, respectively, with the diameter increasing toward the end. The portion between the two tapered portions 41a and 41b is a cylindrical portion 41c with a constant diameter, and its outer circumferential surface 41d is the storage area A around which the yarn Y is wound. The outer circumferential surface 41d of the cylindrical portion 41c is mirror-finished. The two tapered portions 41a and 41b on both ends prevent the yarn Y wound around the cylindrical portion 41c from falling off.

[0043] A ring member 42 is wound around the outer peripheral surface 41d of the cylindrical portion 41c of the storage roller 41. The ring member 42 is formed into an annular shape from, for example, rubber. The ring member 42 is attached to the boundary between the cylindrical portion 41c and the tapered portion 41b on the tip side. The ring member 42 is a tension ring that surrounds the yarn Y pulled out from the storage roller 41 by the package forming unit 8 and contacts the yarn Y to apply resistance. The ring member 42 is attached to the cylindrical portion 41c by an elastic force that tightens the ring member 42 radially inward. The ring member 42 applies resistance to the yarn Y pulled out from the storage roller 41 by this elastic force. The ring member 42 applies an appropriate tension to the yarn Y pulled out from the storage roller 41, stabilizing the unwinding of the yarn Y from the storage roller 41.

[0044] A first recess (recess) 43a is provided in an area of ​​the outer peripheral surface 41d of the storage roller 41 that straddles the mounting position of the ring member 42 in the direction along the rotation axis C1. That is, when viewed from the radial outside of the storage roller 41, the first recess 43a is provided so as to pass through the mounting position of the ring member 42 and intersect with the mounting position, and a portion of the first recess 43a overlaps with the mounting position. Here, the first recess 43a forms a groove that extends in the direction along the rotation axis C1 from one end to the other end of the storage roller 41. The first recess 43a has, for example, the same cross-sectional shape in its longitudinal direction, and is formed in a substantially rectangular cross-section. A second recess (recess) 43b is further provided in the outer peripheral surface 41d of the storage roller 41. The second recess (recess) 43b is a recess (so-called downgage) that is provided to prevent the formation of a recess (so-called sink mark) when molding a boss or reinforcing rib for embedding a sensor magnet on the inner surface 41g of the cylindrical portion 41c.

[0045] The drive motor 45 rotates the storage roller 41 in a direction to wind the yarn Y from the yarn supplying unit 6. The drive motor 45 can also rotate the storage roller 41 in a direction opposite to the winding direction. The drive motor 45 is a position-controllable motor such as a DC brushless motor, a stepping motor, or a servo motor.

[0046] The yarn storage device 40 has a storage roller rotation speed sensor 46 (FIG. 5). The storage roller rotation speed sensor 46 measures the rotation speed of the storage roller 41. The storage roller rotation speed sensor 46 is connected to, for example, the output rotation shaft of the drive motor 45, and measures the rotation speed of the storage roller 41 based on the rotation speed of the output rotation shaft. The storage roller rotation speed sensor 46 is, for example, an encoder.

[0047] The yarn Y wound around the storage roller 41 is pulled out from the tapered portion 41b at the other end (the upstream side of the storage roller 41) of the storage roller 41 and sent downstream (toward the package forming unit 8). At the tapered portion 41b, the yarn Y on the storage roller 41 is pulled out downstream via a pull-out guide 37 located on an extension of the rotation axis C1 of the storage roller 41. The yarn Y wound around the storage roller 41 is unwound through the ring member 42, which applies an appropriate tension to the unwound yarn Y.

[0048] A yarn amount detection sensor 50 is disposed near the outer peripheral surface 41d of the cylindrical portion 41c of the storage roller 41. The yarn amount detection sensor 50 detects when the amount of yarn Y stored in the storage roller 41 has reached a predetermined amount. The detection range of the yarn amount detection sensor 50 may be from an upper limit to a lower limit of the storage amount. The yarn amount detection sensor 50 may be configured, for example, with a light source 53 that emits light toward the storage roller 41, and a sensor 55 that is disposed so that light reflected from the outer peripheral surface 41d is not incident and light reflected from the yarn Y stored in the storage roller 41 is incident. In this case, the yarn amount detection sensor 50 can detect that the amount of stored yarn Y has reached the predetermined amount when the light emitted from the light source 53 is reflected off the yarn Y and detected by the sensor 55.

[0049] The light source 53 may be, for example, an LED (Light Emitting Diode). The sensor 55 may be, for example, a photodiode. Alternatively, the sensor 55 may be a line sensor, such as a CCD image sensor or a CMOS image sensor, that acquires the amount of light using photodiodes arranged in a row.

[0050] (2-4) Thread guide 2, a detailed configuration of the yarn guide unit 7 that guides the yarn Y between the yarn supplying unit 6 and the yarn storage device 40 will be described. The yarn guide unit 7 is disposed in the yarn path (yarn traveling path) of the yarn Y, and includes an unwinding assisting device 7a, a lower yarn feeler 7b, a tension applying unit 7c, a capturing device 7d, a yarn joining device 7e, a yarn monitoring device 7f, a yarn spouting unit 7g, and a yarn guide member 7h.

[0051] The unwinding assist device 7a assists in the unwinding of the yarn Y by bringing a movable member 71 into contact with a balloon formed above the yarn supplying bobbin 21 when the yarn Y unwound from the yarn supplying bobbin 21 is swung around, and by appropriately controlling the size of the balloon.

[0052] The lower thread feeler 7b is disposed in a position close to the unwinding assist device 7a on the downstream side of the unwinding assist device 7a. The lower thread feeler 7b determines whether or not the yarn Y supplied from the unwinding assist device 7a is present.

[0053] The tension applying unit 7c applies a predetermined tension to the running yarn Y. The tension applying unit 7c applies a predetermined tension to the yarn Y based on the tension of the yarn Y detected by a tension sensor. The tension applying unit 7c is configured as a gate type in which movable comb teeth are arranged relative to fixed comb teeth, and applies a predetermined resistance by running the yarn Y between the comb teeth. The movable comb teeth are configured to be movable, for example, by a solenoid, so that the comb teeth are in an engaged or disengaged state. The configuration of the tension applying unit 7c is not particularly limited, and may be, for example, a disk-type tension applying unit.

[0054] The capturing device 7d is disposed downstream of the tension applying unit 7c. The capturing device 7d has a first capturing portion 72 and a second capturing portion 73. In this embodiment, the first capturing portion 72 and the second capturing portion 73 are integrated and configured as a single component. The first capturing portion 72 and the second capturing portion 73 are each connected to a negative pressure source.

[0055] The first catching part 72 is configured as a cylindrical member with an opening formed at its tip. The first catching part 72 generates a suction airflow during yarn splicing, and sucks in the internal space of the yarn guiding member 7h, thereby sucking in and capturing the yarn Y on the yarn pooling device 40 side.

[0056] The second catching portion 73 is configured as a cylindrical member with an opening formed at its tip. The second catching portion 73 is provided so as to be able to swing. The second catching portion 73 swings between a catching position (position shown by a solid line in FIG. 2) where it catches the yarn Y supplied from the unwinding assisting device 7a, and a guiding position (position shown by a dashed line in FIG. 2) where it guides the yarn Y to the yarn joining device 7e. The catching position may also be a standby position of the second catching portion 73.

[0057] At the capturing position, the second capturing unit 73 generates a suction airflow at its tip end while approaching the yarn path downstream of the lower yarn feeler 7b, thereby sucking in and capturing the yarn end from the yarn supplying bobbin 21. When the yarn Y is cut by the cutter 74, the second capturing unit 73 sucks in and captures the yarn end of the cut yarn Y on the yarn supplying bobbin 21 side. The second capturing unit 73 may also be configured to generate a suction airflow at its tip end to suck in and remove fluff and other debris adhering to the traveling yarn Y.

[0058] When the yarn Y is captured by the second capturing section 73, immediately after a new yarn supplying bobbin 21 is supplied to the yarn supplying section 6, an auxiliary blowing section 75 is provided to blow the yarn end to a position downstream of the lower yarn feeler 7b (the tip of the second capturing section 73).

[0059] The auxiliary blowing off section 75 sprays compressed air into the hollow transport tray 26 and the yarn supplying bobbin 21, thereby creating an air flow at the tip of the yarn supplying bobbin 21 that blows the yarn Y of the yarn supplying bobbin 21 toward the lower thread feeler 7b. When a newly supplied yarn supplying bobbin 21 is supported by the yarn supplying section 6, the auxiliary blowing off section 75 operates to reliably send the yarn end of the yarn supplying bobbin 21 toward the lower thread feeler 7b.

[0060] The yarn splicing device 7e splices the segmented yarn Y. The yarn splicing device 7e splices the end of the yarn Y on the yarn supplying bobbin 21 side to the end of the yarn Y on the yarn storage device 40 side when the yarn monitoring device 7f detects a yarn defect and cuts the yarn Y with the cutter 74, when the yarn Y breaks while being unwound from the yarn supplying bobbin 21, or when the yarn Y is broken between the yarn supplying bobbin 21 and the yarn storage device 40, such as when the yarn supplying bobbin 21 is replaced. The yarn splicing device 7e is disposed at a position slightly removed from the yarn path. The yarn splicing device 7e can connect the introduced yarn ends to make the yarn Y continuous. The yarn splicing device 7e can be a device that uses a fluid such as compressed air, or a mechanical device.

[0061] The yarn monitoring device 7f detects yarn defects such as slub and foreign matter contamination by monitoring the thickness and other characteristics of the yarn Y with an appropriate sensor. A cutter 74 is disposed upstream of and adjacent to the yarn monitoring device 7f. The cutter 74 immediately cuts the yarn Y when the yarn monitoring device 7f detects a yarn defect. The cutter 74 and the yarn monitoring device 7f are housed in a common housing 76. The housing 76 that houses the yarn monitoring device 7f is disposed downstream of the yarn joining device 7e.

[0062] The yarn ejection unit 7g is disposed near the tapered portion 41a on one end side of the storage roller 41 (the upstream side of the storage roller 41), and is configured as a thin tubular member through which the yarn Y can pass. The opening of the yarn ejection unit 7g on the yarn supplying unit 6 side can eject compressed air in the direction from the yarn storage device 40 toward the yarn supplying unit 6. If the yarn Y becomes broken between the yarn supplying bobbin 21 and the yarn storage device 40, the yarn ejection unit 7g ejects air in the direction from the yarn storage device 40 toward the yarn supplying unit 6, thereby sucking and capturing the yarn end of the yarn Y on the yarn storage device 40 side inside and blowing it into the guide path of the yarn guide member 7h.

[0063] On the other hand, during normal yarn winding, the yarn outlet 7g guides the yarn Y supplied from the yarn supplying unit 6 to the tapered portion 41a on one end side of the storage roller 41. When the drive motor 45 is driven to rotate the storage roller 41 in one direction, the yarn Y guided by the yarn outlet 7g to the tapered portion 41a on one end side of the storage roller 41 is sequentially wound around the cylindrical portion 41c while pushing up the previous yarn layer from one end side (upstream side). As a result, the yarn Y already wound around the outer circumferential surface 41d of the storage roller 41 is pushed by the newly wound yarn Y and sequentially sent to the other end side (downstream side). As a result, the yarn Y is aligned in a spiral and regularly wound around the outer circumferential surface of the cylindrical portion 41c of the storage roller 41 from one end side to the other end side.

[0064] The yarn ejection section 7g can be moved by the moving section 77 to an optimal position (called the yarn guide position) for guiding the yarn Y passing from the yarn supply section 6 to the storage roller 41, and an optimal position (called the yarn pull-out position) for drawing out the yarn end of the yarn Y stored in the yarn storage device 40 by suction and guiding it to the yarn joining device 7e (the guide path of the yarn guide member 7h).

[0065] The yarn guide member 7h is a curved cylindrical member, and an opening is formed at each of both longitudinal ends. One opening of the yarn guide member 7h is arranged close to the opening of the yarn discharge part 7g on the yarn supplying part 6 side. The other opening is arranged facing the first catching part 72. A guide path is formed inside the yarn guide member 7h. The guide path connects the openings at both ends of the yarn guide member 7h so as to bypass the yarn monitoring device 7f, the yarn joining device 7e, etc. A slit that penetrates to the guide path is formed along the entire length of the yarn guide member 7h.

[0066] When the yarn Y breaks between the yarn supplying bobbin 21 and the yarn storage device 40, the yarn guiding member 7h guides the yarn Y, which has been blown onto the guide path by the yarn ejection part 7g, along the guide path to the first catching part 72, and the guided yarn Y is caught by the first catching part 72. Because the yarn guiding member 7h has a slit formed along its entire length that penetrates all the way to the guide path, the yarn guiding member 7h can pull the yarn Y caught by the first catching part 72 out of the guide path of the yarn guiding member 7h and guide it towards the yarn joining device 7e.

[0067] (2-5) Control device The configuration of the control device 25 will be described below with reference to Fig. 5. In particular, the control configuration related to the rotation control of the package 30 and the control of the yarn storage device 40 in the control device 25 will be described. Fig. 5 is a diagram showing the control configuration of the control device 25. The control device 25 has an information processing unit 25a and a storage unit 25b.

[0068] The information processing unit 25a is configured with an information processing circuit such as a CPU of the control device 25, and executes various information processes related to the winder unit 2. The information processing unit 25a executes various information processes by executing programs stored in the memory unit 25b. The memory unit 25b is configured with a storage device of the control device 25, and stores various programs, various parameters related to the control of the winder unit 2, and the like.

[0069] The storage unit 25b stores at least deceleration information IN1, winding completion length information IN2, and deceleration / stop yarn length information IN3. The deceleration information IN1 is information for setting the deceleration of the yarn Y in deceleration / stop control. The deceleration / stop control is control in which, when the package 30 becomes full and winding of the yarn Y is stopped, the yarn speed, which is the traveling speed of the yarn Y on the yarn traveling path, is decelerated from the yarn speed during the formation of the package 30 at a fixed deceleration (i.e., the deceleration set by the deceleration information IN1) and set to 0 when the length of the yarn Y wound onto the package 30 reaches the length at the completion of winding (referred to as the package winding completion length). Note that, in the deceleration / stop control, the yarn speed when the length of the yarn Y wound onto the package 30 reaches the package winding completion length may be slightly increased or decreased (error) from 0.

[0070] The deceleration of the yarn Y set by the deceleration information IN1, i.e., the deceleration of the yarn Y during deceleration and stop control, can be changed according to the forming conditions of the package 30. This allows the forming conditions of the package 30 to be set more flexibly.

[0071] The winding completion length information IN2 is information for setting the above-mentioned package winding completion length. The package winding completion length can be determined as the winding completion length information IN2 when the package 30 formation conditions are set.

[0072] The deceleration / stop yarn length information IN3 is information for determining the yarn length of the yarn Y wound onto the package 30 from the start to the end of the deceleration / stop control (referred to as the deceleration / stop yarn length). The inventors experimentally investigated the relationship between the yarn speed immediately before the start of the deceleration / stop control and the deceleration / stop yarn length by changing the yarn speed immediately before the start of the deceleration / stop control, and found that the deceleration / stop yarn length changes linearly with the yarn speed immediately before the start of the deceleration / stop control. That is, when the yarn speed immediately before the start of the deceleration / stop control is x and the deceleration / stop yarn length is y, the deceleration / stop yarn length can be expressed as y=a*xb (a and b: positive constants). The deceleration / stop yarn length information IN3 stores this equation or the constants a and b included in this equation.

[0073] As described above, the deceleration / stop yarn length information IN3 can be calculated using experimentally acquired data representing the relationship between the yarn speed immediately before the start of deceleration / stop control and the yarn length at which deceleration / stop occurs, for example.

[0074] Alternatively, for example, the deceleration / stop yarn length information IN3 can be determined by theoretically calculating the above formula based on the yarn speed during the formation of the package 30 (i.e., the yarn speed immediately before the start of the deceleration / stop control) and the deceleration set in the deceleration information IN1. Specifically, if the yarn speed during the formation of the package 30 is V, the deceleration is Ac, and the time required for the yarn speed to reach 0 when the yarn speed is decelerated from V at the deceleration Ac is t, the yarn length from the start to the end of the deceleration / stop control is given by (Ac*t 2 ) / 2. Since the above t can be expressed as V / Ac, the yarn length from the start to the end of the deceleration stop control can be finally calculated by using the yarn speed and deceleration when the package 30 is formed. 2 It can be expressed as / (2*Ac).

[0075] The information processing unit 25a of the control device 25 described above feeds back the rotation speed of the traverse drum 24 measured by the drum rotation speed sensor 63, and controls the rotation speed of the drum drive motor 62 so that the fed-back rotation speed becomes the target rotation speed, thereby enabling accurate control of the rotation speed of the traverse drum 24.

[0076] In addition, the information processing unit 25a feeds back the rotation speed based on the rotation speed of the storage roller 41 measured by the storage roller rotation speed sensor 46, and controls the rotation speed of the drive motor 45 so that the fed back rotation speed becomes the target rotation speed, thereby accurately controlling the rotation speed of the storage roller 41.

[0077] When decelerating the package 30, the information processing unit 25a feeds back the rotation speed based on the rotation speed of the package 30 measured by the package rotation speed sensor 61, and controls the air pressure by the air pressure variable unit 60a so that the fed back rotation speed becomes the target rotation speed, thereby enabling the package 30 to be decelerated with precision.

[0078] In the winder unit 2 having the above configuration, the yarn Y is wound onto the traverse drum 24 by rotating the traverse drum 24, and then is traversed and supplied from the traverse drum 24 to the package 30. Therefore, the rotation speed of the traverse drum 24 corresponds to the length of the yarn Y wound onto the package 30. Therefore, the information processing unit 25a can measure the length of the yarn Y wound onto the package 30 based on the rotation speed of the traverse drum 24 measured by the drum rotation speed sensor 63.

[0079] Furthermore, the amount of yarn Y supplied to the traverse drum 24 corresponds to the amount of yarn Y that is wound onto the storage roller 41 of the yarn storage device 40 and then supplied from the storage roller 41 to the traverse drum 24. Therefore, the amount of yarn Y wound onto the storage roller 41 by the rotation of the storage roller 41 also corresponds to the length of the yarn Y wound onto the package 30. Therefore, the information processing unit 25a can measure the length of the yarn Y wound onto the package 30 based on the rotation speed of the storage roller 41 measured by the storage roller rotation speed sensor 46.

[0080] In this embodiment, the information processing unit 25a measures the length of the yarn Y wound into the package 30 by combining measurements of the length of the yarn Y using the drum rotation speed sensor 63 and measurements of the length of the yarn Y using the storage roller rotation speed sensor 46.

[0081] Specifically, when starting to form the package 30 or when resuming the formation of the package 30 after stopping it due to yarn breakage, yarn cutting, bobbin replacement, etc., the drum rotation speed sensor 63 is used to measure the length of the yarn Y wound onto the package 30, and otherwise the storage roller rotation speed sensor 46 is used to measure the length of the yarn Y wound onto the package 30. Specifically, when the yarn amount detection sensor 50 detects that the amount of yarn Y stored on the storage roller 41 has reached a predetermined amount, the information processing unit 25a switches from the method of measuring the length of the yarn Y using the drum rotation speed sensor 63 to the method of measuring the length of the yarn Y using the storage roller rotation speed sensor 46.

[0082] When starting / restarting the packaging 30, the amount of the yarn Y stored on the storage roller 41 is unknown, especially since the yarn Y is removed during the restart. For this reason, when starting / restarting the packaging 30, the length of the yarn Y cannot be accurately measured using the storage roller rotation speed sensor 46. Therefore, when starting / restarting the packaging 30, the length of the yarn Y is measured using the drum rotation speed sensor 63, so that the length of the yarn Y wound into the package 30 can be accurately measured.

[0083] Meanwhile, during the formation of the package 30, particularly when the package 30 has a cone shape (a truncated cone shape), the length of the yarn Y cannot be accurately measured using the drum rotation speed sensor 63. On the other hand, because the storage roller 41 has a drum shape (a cylindrical shape), once a predetermined amount of yarn Y has been stored on the storage roller 41, the length of the yarn Y wound onto the package 30 can be accurately measured based on the rotation speed of the storage roller 41, regardless of the shape of the package 30.

[0084] Therefore, after the yarn amount detection sensor 50 detects that the amount of yarn Y stored on the storage roller 41 has reached a predetermined amount, the length of the yarn Y wound onto the package 30 can be measured based on the rotation speed of the storage roller 41, thereby accurately measuring the length of the yarn Y wound onto the package 30 regardless of the shape of the package 30.

[0085] The information processing unit 25a can calculate the yarn speed of the yarn Y as the length of the yarn Y wound into the package 30 per predetermined unit time.

[0086] (3) Package formation operation Hereinafter, the operation of forming a package 30 using the winder unit 2 will be described with reference to FIG. 6. FIG. 6 is a flowchart showing the operation of forming a package 30 using the winder unit 2. FIG. 6 shows a flowchart for forming one package 30. First, the forming conditions for the package 30 are set (step S1). For example, the forming conditions for the package 30 can be set using an input device provided in the machine control device 3 or an input device of the control device 25. Specifically, for example, the yarn length of the yarn Y to be wound into the package 30 (i.e., the package winding completion length (winding completion length information IN2)), the yarn speed of the yarn Y during the formation of the package 30, the deceleration in the deceleration stop control (i.e., the deceleration information IN1), etc. are set. The deceleration in the deceleration stop control can be set to the maximum deceleration. The information processing unit 25a of the control device 25 stores the set forming conditions in the memory unit 25b.

[0087] Thereafter, the information processing unit 25a calculates the length of the yarn Y wound around the package 30 at the start of the deceleration and stop control (referred to as the deceleration start yarn length) (step S2). Specifically, the deceleration start yarn length is calculated as follows.

[0088] First, the information processing unit 25a refers to the deceleration stop yarn length information IN3, grasps the relationship between the deceleration stop yarn length and the yarn speed during the formation of the package 30, and calculates the deceleration start yarn length using the relationship. For example, when the information processing unit 25a grasps the equation y=a*xb (x: yarn speed during the formation of the package 30, y: deceleration stop yarn length, a, b: positive constants) from the deceleration stop yarn length information IN3, the information processing unit 25a can calculate the deceleration stop yarn length by substituting the yarn speed during the formation of the package 30 set in step S1 (the yarn speed immediately before the start of the deceleration stop control) for x in this equation.

[0089] If the deceleration stop yarn length is calculated as 0 or less (0 or a negative value) using the above formula, the deceleration stop yarn length is set as 0. In other words, the start timing of the deceleration stop control is set as the timing when the length of the yarn Y wound onto the package 30 becomes the package winding completion length. This case occurs when the yarn speed during the formation of the package 30 is equal to or less than b / a calculated by solving the above equation with y=0 for x.

[0090] When the yarn speed during formation of the package 30 is low, even if deceleration and stop control is performed at the timing when the length of the yarn Y wound onto the package 30 reaches the package winding completion length, the length of the yarn Y wound onto the package 30 at the time of execution of the deceleration and stop control is short. Therefore, even if deceleration and stop control is performed at the timing when the length of the yarn Y wound onto the package 30 reaches the package winding completion length, the length of the yarn Y wound onto the package 30 can be considered to be within the error range of the package winding completion length.

[0091] For example, from the deceleration stop line length information IN3, y = x 2 When the information processing unit 25a grasps the equation / (2*Ac) (x: yarn speed during formation of the package 30, y: yarn length at which deceleration is stopped, Ac: deceleration), the information processing unit 25a can calculate the yarn length at which deceleration is stopped by substituting the yarn speed during formation of the package 30 set in step S1 for x in this equation and substituting the deceleration set in the deceleration information IN1 for Ac.

[0092] Next, the information processing unit 25a calculates the deceleration start yarn length by subtracting the deceleration stop yarn length calculated as described above from the package winding completion length set in the winding completion length information IN2. That is, (deceleration start yarn length) = (package winding completion length) - (deceleration stop yarn length).

[0093] After calculating the deceleration start yarn length, formation of the package 30 begins (step S3). The information processing unit 25a controls the drive motor 45 to rotate the storage roller 41, and the yarn Y supplied from the yarn supplying unit 6 and passed through the yarn guide unit 7 is wound onto the storage roller 41 and stored. The information processing unit 25a also controls the drum drive motor 62 to rotate the traverse drum 24, and rotates the winding bobbin 22 (package 30). As a result, the yarn Y is wound onto the winding bobbin 22 (package 30) and the package 30 is formed.

[0094] When the formation of the package 30 starts, the information processing unit 25a sets the winding speed of the yarn Y onto the package 30 by the rotation of the traverse drum 24 to be slower than the storage speed of the yarn onto the storage roller 41 by the rotation of the storage roller 41. As a result, storage of the yarn Y onto the storage roller 41 takes priority over supply of the yarn Y from the storage roller 41 to the traverse drum 24, so that the amount of the yarn Y stored on the storage roller 41 reaches a predetermined amount in a short time, and the yarn Y is detected by the yarn amount detection sensor 50 in a short time. As a result, the method for measuring the length of the yarn Y wound onto the package 30 switches from the measurement method using the drum rotation speed sensor 63 to the measurement method using the storage roller rotation speed sensor 46 in a short time.

[0095] In other words, the time from when the package 30 starts to be formed until a predetermined amount of yarn Y is stored on the storage roller 41 can be shortened, so the timing for starting to measure the length of the yarn Y based on the rotation speed of the storage roller 41 can be advanced.

[0096] While the package 30 is being formed, the information processing unit 25a measures the length of the yarn Y wound into the package 30 using the drum rotation speed sensor 63 or the storage roller rotation speed sensor 46, as described above (step S4).

[0097] After measuring the length of the yarn Y wound into the package 30, the information processing unit 25a determines whether the measured length of the yarn Y is the deceleration start yarn length calculated in step S2 (step S5). If the measured length of the yarn Y is shorter than the deceleration start yarn length ("No" in step S5), the formation of the package 30 continues while measuring the length of the yarn Y wound into the package 30.

[0098] On the other hand, if the measured length of the yarn Y is the deceleration start yarn length ("Yes" in step S5), the information processing unit 25a starts deceleration stop control (step S6). Specifically, the information processing unit 25a decelerates the yarn speed of the yarn Y from the yarn speed during the formation of the package 30 to 0 at the deceleration set in the deceleration information IN1 (for example, the maximum deceleration), stops the rotation of the package 30, and ends the formation of the package 30.

[0099] During the execution of the deceleration and stop control, the information processing unit 25a uses both the brake device 60 to decelerate the package 30 and the traverse drum 24. The deceleration when using these two deceleration methods in combination is specifically performed as follows.

[0100] The information processing unit 25a first controls the air pressure varying unit 60a of the brake device 60 to start decelerating the package 30 at a set deceleration rate. Thereafter, the information processing unit 25a controls the drum drive motor 62 to start decelerating the traverse drum 24. That is, the information processing unit 25a first decelerates the package 30, and then decelerates the traverse drum 24. As a result, the peripheral speed of the package 30 becomes slower than the peripheral speed of the traverse drum 24.

[0101] At this time, the information processing unit 25a controls the air pressure varying unit 60a of the brake device 60 to adjust the deceleration of the package 30 and the rotation of the drum drive motor 62 to control the deceleration of the traverse drum 24 so that the difference between the peripheral speed of the package 30 and the peripheral speed of the traverse drum 24, i.e., the amount of slippage between the package 30 and the traverse drum 24, falls within a predetermined range. The allowable range of the amount of slippage is preferably 50 to 1000 m / min, and more preferably 200 to 400 m / min, for example.

[0102] In this way, by decelerating the package 30 by using the brake device 60 in combination with decelerating the traverse drum 24, it is possible to stop the rotation of the package 30 in a short time while suppressing slippage between the package 30 and the traverse drum 24. In other words, even if the package 30 is stopped in a short time by maximum deceleration, for example, no damage is caused to the package 30.

[0103] Furthermore, by combining the deceleration of the package 30 by the brake device 60 and the deceleration of the traverse drum 24, the package 30 can be lifted up and separated from the traverse drum 24, and the package 30 can be stopped without cutting the yarn Y. That is, in the winder unit 2 of this embodiment, the package 30 comes into contact with the traverse drum 24, and the package 30 is stopped in a state in which the yarn Y between the package 30 and the yarn storage device 40 is connected (not cut).

[0104] In the winder unit 2 that terminates winding of the yarn Y onto the package 30 by the deceleration stop control as described above, the start timing of the deceleration stop control is determined taking into consideration not only the length of the yarn Y wound onto the package 30 but also the yarn speed during the formation of the package 30, i.e., the yarn speed immediately before the start of the deceleration stop control. Specifically, the deceleration stop yarn length, which is the yarn length of the yarn Y wound onto the package 30 from the start to the end of the deceleration stop control, is calculated based on the yarn speed during the formation of the package 30, and the start timing of the deceleration stop control is determined to be when the length of the yarn Y wound onto the package 30 becomes the deceleration start yarn length, which is calculated by subtracting the deceleration stop yarn length from the package winding completion length.

[0105] As a result, even if the yarn speed during formation of the package 30 varies, the amount of yarn wound onto the package 30 at the end of winding can be kept substantially constant at the package winding completion length. For example, as shown in Fig. 7, when the yarn speed of the yarn Y is V1, the deceleration start yarn length is calculated to be L1, and deceleration stop control is started at time t1 when the length of the yarn Y wound onto the package 30 reaches the deceleration start yarn length L1, and at time tf1 the yarn speed becomes 0, the formation of the package 30 ends, and the winding length of the yarn Y becomes the package winding completion length LF. Fig. 7 is a diagram showing an example of the temporal change in the winding length of the yarn Y when the yarn speed varies.

[0106] On the other hand, when the yarn speed of the yarn Y is V2, which is lower than V1, the deceleration start yarn length is calculated to be L2, which is greater than L1, and time t2, at which the length of the yarn Y wound into the package 30 reaches the deceleration start yarn length L2, occurs after time t1. By starting the deceleration stop control at time t2, the yarn speed becomes 0 at time tf2, and the formation of the package 30 is completed. The wound length of the yarn Y when the formation of the package 30 is completed is the package winding completion length LF, which is the same as when the yarn speed is V1.

[0107] 2. Other Embodiments Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible within the scope of the gist of the invention. In particular, the multiple embodiments and modifications described in this specification can be arbitrarily combined as necessary. (A) The process content of each step in the flowchart of FIG. 6 showing the operation of forming a package 30 using the winder unit 2 and the order in which each step is performed can be changed as desired without departing from the spirit of the invention.

[0108] (B) In the above embodiment, the yarn speed is reduced once from the yarn speed during the formation of the package 30 to 0, and then the formation of the package 30 is terminated. However, this is not limited to this, and the yarn speed may be reduced to 0 after one or more deceleration stages, and then the formation of the package 30 may be terminated. Specifically, for example, as shown in FIG. 8, the formation of the package 30 may be terminated after two stages of deceleration. FIG. 8 is a diagram showing an example of the change in yarn speed over time when the formation of the package 30 is terminated after multiple stages of deceleration.

[0109] More specifically, the yarn speed during the formation of the package 30 is set to V3, and deceleration begins at time t3 to maintain the yarn speed constant at V4, and the formation of the package 30 is continued. Further, deceleration begins at time t4 to maintain the yarn speed constant at V5, and the formation of the package 30 is continued. Thereafter, the deceleration stop control described above begins at time t5 to decelerate the yarn speed from V5 to 0, and the formation of the package 30 is completed. In this case, the deceleration start yarn length is calculated as the winding length of the yarn Y at the above-described time t5.

[0110] By completing the formation of the package 30 after the multiple stages of deceleration as described above, the yarn speed immediately before the start of the deceleration and stop control can be made smaller than when the yarn speed is suddenly reduced from the yarn speed during the formation of the package 30 to 0. Therefore, the length of the yarn Y wound onto the package 30 when the formation of the package 30 is completed can be made close to the complete package winding length.

[0111] (C) If the sensor 55 of the yarn amount detection sensor 50 is a line sensor, the amount of yarn Y stored on the storage roller 41 can be determined even when the yarn Y is removed due to yarn breakage or the like. Therefore, the length of the yarn Y wound onto the package 30 can be measured based only on the rotation speed of the storage roller 41.

[0112] (D) In ​​the first embodiment described above, the yarn supplying unit 6 supplies the yarn Y unwound from the yarn supplying bobbin 21. That is, the winder unit 2 of the first embodiment is an automatic winder. However, this is not limiting, and other types of yarn supplying unit 6 can also be used. For example, the yarn supplying unit 6 may supply the yarn Y spun by air force. That is, the winder unit 2 may be an air spinning machine.

[0113] (E) Alternatively, the yarn supplying section 6 may be configured to supply the yarn Y spun by the rotational force of a rotor. In other words, the winder unit 2 may be an open-end spinning machine.

[0114] 3. Features of the embodiment The above embodiment can also be explained as follows. (1) A yarn winding device (for example, a winder unit 2) includes a yarn supplying unit (for example, a yarn supplying unit 6), a winding unit (for example, a package forming unit 8), and a control unit (for example, a control device 25). The yarn supplying unit supplies a yarn (for example, a yarn Y). The winding unit winds the yarn to form a package (for example, a package 30). The control unit controls the winding unit. The control unit executes deceleration and stop control on the winding unit. The deceleration and stop control is a control that decelerates the yarn speed, which is the traveling speed of the yarn, from the yarn speed during package formation and sets it to 0 when the length of the yarn wound onto the package reaches a predetermined package winding completion length. In this case, the start timing of the deceleration and stop control is determined based on the package winding completion length, the yarn speed during package formation, and the length of the yarn wound onto the package.

[0115] In a yarn winding device that completes winding of yarn onto a package using the above-described deceleration and stop control, the timing for starting the deceleration and stop control is determined based not only on the length of yarn wound onto the package but also on the yarn speed during package formation, i.e., the yarn speed immediately before the start of the deceleration and stop control. This makes it possible to keep the amount of yarn wound onto the package at the end of winding approximately constant at the completed package winding length, even if the yarn speed during package formation differs.

[0116] (2) In the yarn winding device of (1) above, the yarn deceleration in the deceleration / stop control may be set in advance. This allows the time required for the yarn speed to be reduced from the speed immediately before the start of the deceleration / stop control to zero to be known, thereby enabling the start timing of the deceleration / stop control to be accurately determined.

[0117] (3) In the yarn winding device of (1) or (2) above, the deceleration rate of the yarn during the deceleration and stop control may be changeable, thereby enabling more flexible setting of package formation conditions.

[0118] (4) In any of the yarn winding devices (1) to (3) above, the winding unit may have a rotary drive unit (e.g., the traverse drum 24) that rotates the package. In this case, the control unit may measure the length of the yarn wound onto the package based on the drive amount of the rotary drive unit (e.g., the number of rotations of the traverse drum 24). This eliminates the need for a sensor that can directly measure the length of the wound yarn.

[0119] (5) In the yarn winding device described above in (4), the winding unit may further include a brake device (e.g., brake device 60) that slows down the rotational speed of the package. In this case, the control unit may perform deceleration and stop control by combining the deceleration of the package by the brake device and the deceleration of the rotary drive unit. This makes it possible to stop the rotation of the package in a short time while suppressing slippage between the package and the rotary drive unit.

[0120] Furthermore, when the brake device decelerates the package and the rotary drive unit decelerates the package, the package comes into contact with the rotary drive unit and the yarn is connected when the deceleration and stop control ends. That is, when the deceleration and stop control ends, the package is not lifted up to separate it from the rotary drive unit, but by determining the start timing of the deceleration and stop control as described above, the amount of yarn wound onto the package at the end of winding can be kept substantially constant at the completed package winding length even without lifting up.

[0121] (6) Any of the yarn winding devices described above in (1) to (5) may further include a storage roller (e.g., storage roller 41). The storage roller is provided between the yarn supplying unit and the winding unit in the yarn running direction, and winds and temporarily stores the yarn. In this case, the control unit may measure the length of the yarn wound into the package based on the number of rotations of the storage roller. This allows the length of the yarn wound into the package to be accurately measured regardless of the shape of the package.

[0122] (7) The yarn winding device described in (6) above may further include a yarn amount detection sensor (e.g., yarn amount detection sensor 50). The yarn amount detection sensor detects when the amount of yarn stored on the storage roller reaches a predetermined amount. In this case, the control unit may measure the length of the yarn wound into the package based on the number of rotations of the storage roller after the yarn amount detection sensor detects that the amount of yarn stored on the storage roller has reached the predetermined amount. When package formation begins (restarts), the amount of yarn stored on the storage roller is unknown (varies), so the yarn length measured based on the number of rotations of the storage roller from the start of formation will be inaccurate. Therefore, as described above, by measuring the yarn length based on the number of rotations of the storage roller after the amount of yarn stored on the storage roller reaches the predetermined amount, the yarn length can be measured more accurately.

[0123] (8) In the yarn winding device described above in (7), the control unit may set the speed at which the yarn is wound onto the package to be slower than the speed at which the yarn is stored onto the storage roller when package formation starts. This shortens the time from when package formation starts until a predetermined amount of yarn is stored on the storage roller, thereby accelerating the timing at which measurement of the yarn length based on the number of rotations of the storage roller starts.

[0124] (9) In any of the yarn winding devices described above in (1) to (8), the control unit may calculate a deceleration stop yarn length, which is the yarn length of the yarn wound onto the package from the start to the end of the deceleration stop control, based on the yarn speed during package formation, and determine the start timing of the deceleration stop control as the time when the yarn length wound onto the package becomes a deceleration start yarn length obtained by subtracting the deceleration stop yarn length from the package winding completion length. This makes it possible to accurately determine the start timing of the deceleration stop control based on the package winding completion length, the yarn speed during package formation, and the yarn length wound onto the package.

[0125] (10) In the yarn winding device of (9) above, the yarn length at which deceleration stops may change linearly with respect to the yarn speed during package formation, thereby making it possible to easily calculate the yarn length at which deceleration stops. [Industrial Applicability]

[0126] The present invention can be widely applied to yarn winding devices. [Explanation of symbols]

[0127] 1: Automatic winder 2: Winder unit 3: Machine control device 4: Yarn bobbin supply device 5: Doffing device 6: Yarn feeding section 7: Thread guide section 7a: Unwinding aid device 7b: Lower thread feeler 7c: Tension applying section 7d: Capture device 7e: Yarn splicing device 7f: Yarn monitoring device 7g: Thread ejection part 7h: Thread guide member 71: Movable parts 72: First capture unit 73: Second capture unit 74: Cutter 75: Auxiliary blow-off section 76: Housing 77: Moving part 8: Package forming section 23: Cradle 23a, 23b: Cradle arm 23c, 23d: Bobbin holder 23e, 23f: Holder body 24: Trapezoid drum 24a: Traverse groove 60: Brake device 60a: Air pressure variable section 61: Package rotation speed sensor 62: Drum drive motor 63: Drum rotation speed sensor 21: Yarn supply bobbin 22: Winding bobbin 25: Control device 25a: Information processing section 25b: Storage section 26: Transport tray 30: Package 37: Drawer guide 40: Yarn storage device 41: Storage roller 41a: Tapered section 41b: Tapered section 41c: Cylindrical part 41d: Outer surface 41g: Inner surface 42: Ring member 43a: First recess 45: Drive motor 46: Storage roller rotation speed sensor 50: Yarn amount detection sensor 53 :Light source 55: Sensor 70: Wax application device Y: Thread

Claims

1. a yarn supplying unit for supplying yarn; a winding section that winds the yarn to form a package; a control unit that controls the winding unit; Equipped with the control unit executes deceleration and stop control on the winding unit to decelerate a yarn speed, which is a running speed of the yarn, from the yarn speed during formation of the package, and set the yarn speed to 0 when the length of the yarn wound onto the package reaches a preset package winding completion length; The start timing of the deceleration and stop control is determined based on the completed package winding length, the yarn speed during the formation of the package, and the length of the yarn wound onto the package. Thread winding device.

2. The yarn winding device according to claim 1 , wherein the deceleration rate of the yarn during the deceleration and stop control is set in advance.

3. The yarn winding device according to claim 1 or 2, wherein the deceleration rate of the yarn during the deceleration and stop control is variable.

4. the winding unit has a rotary drive unit that rotates the package; The yarn winding device according to any one of claims 1 to 3, wherein the control unit measures the length of the yarn wound onto the package based on the drive amount of the rotary drive unit.

5. the winding section further includes a brake device that reduces the rotation speed of the package; the control unit executes the deceleration and stop control by using both the brake device to decelerate the package and the rotary drive unit to decelerate, The yarn winding device according to claim 4 , wherein the package comes into contact with the rotary drive unit and the yarn is connected to the package when the deceleration and stop control is completed.

6. a storage roller provided between the yarn supplying section and the winding section in the yarn running direction, the storage roller winding the yarn and temporarily storing the yarn; The yarn winding device according to any one of claims 1 to 5, wherein the control unit measures the length of the yarn wound onto the package based on the number of rotations of the storage roller.

7. The yarn amount detecting sensor detects whether the amount of yarn stored in the storage roller reaches a predetermined amount.

7. The yarn winding device according to claim 6, wherein the control unit measures the length of the yarn wound onto the package based on the number of rotations of the storage roller after the yarn amount detection sensor detects that the amount of yarn stored on the storage roller has reached a predetermined amount.

8. The yarn winding device according to claim 7 , wherein the control unit, when starting to form the package, sets a speed at which the yarn is wound onto the package to be slower than a speed at which the yarn is stored onto the storage roller.

9. The control unit calculating a deceleration stop yarn length, which is a yarn length of the yarn wound onto the package from the start to the end of the deceleration stop control, based on a yarn speed during formation of the package; The start timing of the deceleration and stop control is determined to be when the length of the yarn wound onto the package reaches a deceleration start yarn length obtained by subtracting the deceleration and stop yarn length from the package winding completion length. The yarn winding device according to any one of claims 1 to 8.

10. The yarn winding device according to claim 9 , wherein the deceleration stop yarn length changes linearly with respect to the yarn speed during the formation of the package.

Images