Yarn winding device

Abstract

The present invention provides a yarn winding device that improves the quality of a package. The yarn winding device (10) comprises a yarn supply section (15), a winding section (17), a yarn joining device (38), a first catching section (30), a second catching section (34), a detection section (40, 43) and a control section (50). The control section 50 performs a first control and a second control. In the first control, while executing a first rotation control including an action of rotating a package (22) in a direction of unwinding a yarn (14) (reverse rotation), the yarn end on the package side is caught by the first catching section (30), and then, when the yarn is detected by the detection section (40, 43), a second rotation control is performed to further rotate the package (22) in the direction of unwinding the yarn (14). In the second control, when the yarn is not detected by the detection section (40, 43) after the first control, a first abnormality is notified.

Description

Technical Field

[0001] The invention relates to a yarn winding device. Background Art

[0002] A yarn winding device is known that winds the yarn unwound from the yarn supply bobbin to form a package. In the case of yarn breakage between the yarn supply bobbin and the package, the yarn on the package side is sucked and captured by a suction nozzle and guided to a yarn joining device for yarn joining.

[0003] In the yarn winding device of International Publication No. 2015 / 029275, the upper yarn catching and guiding device moves from a standby position to a catching position on the package side, attracts and catches the yarn on the package side, i.e., the upper yarn. Then, the upper yarn catching and guiding device returns to the standby position, thereby guiding the upper yarn to the yarn joining device.

[0004] When yarn breakage occurs between the yarn supply bobbin and the package, the yarn end on the package side may get stuck in the yarn wound on the package. This situation where the yarn end on the package side gets stuck under the yarn wound on the package is called "yarn biting". If the yarn is wound on the package in a state where yarn biting occurs, the quality of the package will be deteriorated. Summary of the invention

[0005] An object of the present invention is to reduce the situation in which a yarn is wound onto a package in a state where a yarn overlap occurs in a yarn winding device, thereby improving the quality of the package.

[0006] Hereinafter, a plurality of methods will be described as means for solving the problem. These methods can be arbitrarily combined as needed.

[0007] The yarn winding device disclosed in the present invention comprises a yarn supplying section, a winding section, a yarn joining device, a first catching section, a second catching section, a detection section and a control section. The yarn supplying section supplies yarn. The winding section winds the yarn supplied from the yarn supplying section to form a package. The yarn joining device joins the yarn on the package side with the yarn on the yarn supplying section side. The first catching section catches the yarn end on the package side and guides the yarn to the yarn joining device. The second catching section catches the yarn end on the yarn supplying section side and guides the yarn to the yarn joining device. The detection section detects the yarn caught by the first catching section. The control section performs a first control and a second control. In the first control, the yarn is caught by the first catching section in a state where a first rotation control including an action of rotating the package in the unwinding direction of the yarn (reverse rotation) is executed, and then, when the yarn is detected by the detection section, a second rotation control is executed to further rotate the package in the unwinding direction of the yarn. In the second control, when the yarn is not detected by the detection section after the first control, a first abnormality is notified.

[0008] The yarn winding device notifies an abnormality when there is a possibility that a yarn leak occurs, thereby reducing the situation where the yarn is wound onto a package in a state where a yarn leak occurs, thereby improving the quality of the package.

[0009] The control unit may also perform a catching control. In the catching control, the first catching unit catches the yarn and the detecting unit detects the yarn while the package is rotated at a first speed in the unwinding direction of the yarn. The first control is performed when the result of the catching control is that no yarn is detected, and the rotation speed of the package in the second rotation control may be a second speed faster than the first speed.

[0010] When the first catching section fails to catch the yarn in the catching control, the yarn winding device performs the first control. In the second rotation control, the package is reversely rotated at a speed faster than the rotation speed in the catching control. Thus, the detection accuracy of the occurrence of the yarn leakage is improved.

[0011] The control section may rotate the package in the yarn unwinding direction at the first speed when the yarn is detected as a result of the catching control.

[0012] In this yarn winding device, when the first catching section successfully catches the yarn during the catching control, the package is rotated in the yarn unwinding direction while maintaining the first speed, thereby reducing the amount of yarn sucked by the first catching section.

[0013] The second speed may be a speed that is 4 times or more and 9 times or less of the first speed.

[0014] The control section may change the second speed based on the diameter of the package.

[0015] In this yarn winding device, the package can be rotated at an appropriate speed regardless of the diameter of the package.

[0016] As the first rotation control, the control section may rotate the package in the yarn winding direction at a third speed faster than the first speed, and then rotate the package in the yarn unwinding direction at the first speed.

[0017] In this yarn winding device, the yarn on the package side can be efficiently caught.

[0018] As the first rotation control, the control section may cause the package to perform an alternating rotational motion in which the package alternately performs a forward rotation in the yarn winding direction and a reverse rotation in the yarn unwinding direction.

[0019] In this yarn winding device, the yarn on the package side can be efficiently caught.

[0020] The control section may separate the first catching section from the package before executing the second rotation control.

[0021] In this yarn winding device, since the suction of the first catching portion does not act on the yarn wound on the package, the loose yarn is easily wound on the package when the package is reversely rotated. This improves the detection accuracy of loose yarn generation.

[0022] The detection unit may also include a first detection unit and a second detection unit. The first detection unit detects the yarn inside the first capture unit. The second detection unit detects the yarn in the yarn travel path of the yarn between the yarn supply unit and the winding unit. The control unit may also cause the first detection unit to detect the yarn in the first control, and cause the second detection unit to detect the yarn in the second control.

[0023] The control section may notify the second abnormality when the yarn is not detected by the detection section during the first control.

[0024] In this yarn winding device, the case where the yarn cannot be caught in the first control (catching failure) and the case where the yarn cannot be caught in the second control (there is a possibility of yarn jamming) can be distinguished and the abnormality can be notified.

[0025] In the yarn winding device according to the present invention, the quality of the package is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a diagram showing the structure of an automatic winder.

[0027] Figure 2 It is a diagram showing the structure of a yarn winding device.

[0028] Figure 3 This is a flowchart showing the flow of processing for forming a package.

[0029] Figure 4 This is a flowchart showing the processing flow of the first control and the second control.

[0030] Figure 5 It is a figure which shows the package which produced the diamond yarn.

[0031] Figure 6 2 is a timing chart of the first rotation control and the second rotation control.

[0032] Figure 7 1 is a timing chart of the first rotation control and the second rotation control of Modification Example H.

[0033] Figure 8 1 is a flowchart showing the processing flow of the first control and the second control of Modification K.

[0034] Fig. 9 1 is a flowchart showing the processing flow of the first control and the second control of Modification Example L.

[0035] Fig.10 1 is a flowchart showing the processing flow of the first control and the second control of Modification Example M. DETAILED DESCRIPTION

[0036] 1. First Implementation

[0037] (1) Structure of automatic winding machine

[0038] The first embodiment of the present invention is described in detail below. Figure 1 The structure of the automatic winder 1 according to the first embodiment will be described. Figure 1 1 is a diagram showing the structure of the automatic winder 1.

[0039] The automatic winder 1 has a plurality of yarn winding devices 10 arranged in parallel. Each yarn winding device 10 unwinds a yarn 14 from a yarn supply bobbin 16 and traverses the yarn 14 to form a package 22. The structure and operation of the yarn winding device 10 will be described in detail later.

[0040] The automatic winding machine 1 has a machine control device 12. The machine control device 12 can communicate with each yarn winding device 10. The operator of the automatic winding machine 1 can manage the plurality of yarn winding devices 10 in a unified manner by appropriately operating the machine control device 12. The machine control device 12 is provided with a display 12a and an input interface 12b. The display 12a displays information related to the setting content and / or status of the yarn winding device 10. The operator can perform the setting operation of the yarn winding device 10 by performing appropriate operations using the input interface 12b.

[0041] The display 12a is a display device such as a liquid crystal display. The input interface 12b is an input device such as an input key or a touch panel. The display 12a and the input interface 12b which is a touch panel may be integrated.

[0042] The automatic winder 1 includes a doffing device 13. When the package 22 in each yarn winding device 10 becomes fully wound (a state in which a predetermined amount of yarn is wound), the doffing device 13 moves to the position of the yarn winding device 10, removes the fully wound package, and sets an empty winding bobbin.

[0043] (2) Structure of the yarn winding device

[0044] Below, use Figure 2 The detailed structure of the yarn winding device 10 according to the first embodiment will be described. Figure 2As shown, the yarn winding device 10 includes: a main body of the yarn winding device 10 having a yarn supply unit 15 and a winding unit 17, and a unit control unit (control unit) 50. The yarn winding device 10 involved in the first embodiment is a drum-type yarn winding device 10, but the yarn winding device 10 may also be an arm traverse type winding device or a belt traverse type winding device. In addition, the yarn winding device 10 involved in the first embodiment is mounted on the automatic winder 1, but the yarn winding device 10 may also be mounted on an air spinning machine or an open-end spinning machine, for example.

[0045] The yarn winding device 10 has a yarn supply section 15 at the lower part. In other words, the yarn winding device 10 has the yarn supply section 15 on the upstream side in the traveling direction of the yarn 14 when the yarn is wound. The yarn supply section 15 supplies the yarn 14 for manufacturing the package 22 to the winding section 17. Specifically, the yarn supply section 15 is a conveying tray type supply mechanism that supports the yarn supply bobbin 16 placed on a conveying tray (not shown) at a prescribed position and supplies the yarn supply bobbin 16 to the prescribed position. The yarn supply section 15 is not limited to a conveying tray type supply mechanism, and may be, for example, a magazine type supply mechanism. In addition, the position of the yarn supply section 15 is not limited to the lower part.

[0046] The yarn 14 is drawn out from the yarn supply bobbin 16 supported by the yarn supply section 15 by the winding section 17. The drawn out yarn 14 is wound into a package 22 by the winding section 17.

[0047] The yarn winding device 10 has a winding section 17 at the upper part. In other words, the yarn winding device 10 has the winding section 17 at the downstream side in the traveling direction of the yarn 14 when the yarn is wound. The winding section 17 has a cradle 18 and a winding drum 20 as main structures. In addition, the position of the winding section 17 is not limited to the upper part.

[0048] The cradle 18 sandwiches the package 22 from both ends in the longitudinal direction by a pair of rotation support portions (not shown), thereby supporting the package 22 so as to be rotatable around a predetermined axis.

[0049] The winding drum 20 is a cylindrical member that is driven to rotate about an axis by a first motor 21. The winding drum 20 is driven to rotate while the outer periphery of the package 22 is in contact with the winding drum 20, thereby imparting a driving force to the package 22, so that the package 22 rotates as the winding drum 20 rotates.

[0050] In addition, a spiral traverse groove is formed on the side surface of the cylinder of the winding drum 20. While the winding drum 20 is driven to rotate, the package 22 is driven to rotate, and the yarn 14 unwound from the yarn supply bobbin 16 traverses with a constant width on the surface of the package 22 by the traverse groove. Thus, the yarn 14 supplied by unwinding from the yarn supply bobbin 16 traverses on the surface of the package 22 and is wound. As a result, the package 22 having a constant winding width is formed.

[0051] The yarn winding device 10 includes a yarn unwinding assisting device 25, a tension applying device 27, a yarn joining device 38, and a yarn clearer (second detecting section) 40 in this order from the yarn supplying section 15 toward the winding section 17.

[0052] The yarn unwinding assisting device 25 limits the expansion (balloon) of the yarn 14 during unwinding, and stabilizes the unwinding tension. The yarn unwinding assisting device 25 has a movable cylinder 26. The yarn unwinding assisting device 25 assists the unwinding of the yarn 14 from the yarn supply bobbin 16 by lowering the movable cylinder 26 covering the core tube of the yarn supply bobbin 16 in conjunction with the unwinding of the yarn 14 from the yarn supply bobbin 16. The movable cylinder 26 utilizes the rotation and centrifugal force of the yarn 14 unwound from the yarn supply bobbin 16 to contact the balloon formed on the upper part of the yarn supply bobbin 16, and assists the unwinding of the yarn 14 by applying appropriate tension to the balloon.

[0053] The tension applying device 27 applies a predetermined tension to the traveling yarn 14. As the tension applying device 27, for example, a gate-type device in which movable comb teeth are arranged relative to fixed comb teeth can be used. The comb teeth on the movable side are configured so that the comb teeth are in a meshing state or a released state with each other. By bending the meshing comb teeth and passing the yarn 14, a certain tension can be applied to the wound yarn 14 to improve the quality of the package 22. In addition, in addition to the above-mentioned gate-type device, the tension applying device 27 can also adopt a disk-type device, for example.

[0054] The yarn splicing device 38 splices the yarn 14 on the yarn supply bobbin 16 side and the yarn 14 on the package 22 side when the yarn clearer 40 detects a yarn defect or when the yarn is broken while being unwound from the yarn supply bobbin 16. The yarn splicing device 38 is, for example, a splicing device that twists the yarn ends together using a swirling air flow generated by compressed air.

[0055] The yarn clearer 40 monitors the state of the yarn 14 traveling on the yarn traveling path between the yarn supply unit 15 and the winding unit 17, and detects the presence or absence of a yarn defect based on the monitored information. The yarn clearer 40 detects, for example, an abnormality in the thickness of the yarn 14 and / or impurities contained in the yarn 14 as a yarn defect. In addition, the yarn clearer 40 also detects the presence or absence of the yarn 14 on the traveling path.

[0056] Specifically, the yarn clearer 40 has a slit for the yarn 14 to pass through on the yarn travel path of the yarn 14, and monitors the yarn 14 passing through the slit using a sensor (not shown). For example, if the yarn clearer 40 detects that the amount of light detected by the optical sensor is within a predetermined range and is normal, it outputs a yarn presence signal to the unit control unit 50.

[0057] In addition, for example, when the yarn clearer 40 detects that the amount of light detected by the optical sensor is greater than the above-mentioned predetermined range (the yarn 14 is too thin or the yarn is broken) or less than the above-mentioned predetermined range (the yarn 14 is too thick), it can output a yarn defect detection signal to the unit control unit 50. In addition, the sensor is not limited to an optical sensor, but may also be a capacitive sensor.

[0058] A cutter 41 for cutting the yarn 14 is provided near the yarn clearer 40. The cutter 41 is actuated by the yarn clearer 40.

[0059] The yarn winding device 10 has a first catching section 30 on the downstream side of the yarn joining device 38 in the traveling direction of the yarn 14 when the yarn is wound. The first catching section 30 is a device that catches the yarn end of the yarn 14 on the package 22 side by suction when the yarn 14 is in a cut state. The first catching section 30 has a shaft 31, a tube 32, and a suction catching section 33. The tube 32 and the suction catching section 33 can rotate from a standby position ( Figure 2 The solid line) rotates (moves) to the capture position ( Figure 2 In the following description, the yarn 14 on the package 22 side is sometimes referred to as the upper yarn, and the yarn end of the upper yarn is sometimes referred to as the upper yarn end.

[0060] In addition, in the first capture portion 30, a suction device 19 is connected to the shaft portion 31 side of the tube portion 32, and a suction flow can be generated in the suction capture portion 33 (more specifically, the suction port at the front end). As the suction device 19, for example, a system having a duct 191 and a suction source 193 is used, wherein the duct 191 extends along the side-by-side arrangement direction of each yarn winding device 10 on the back side of each yarn winding device 10 and one end of the duct 191 is connected to the shaft portion 31, and the suction source 193 is connected to the other end of the duct 191 and makes the duct 191 a specified negative pressure. The suction source 193 is, for example, a blower. The suction capture portion 33 is slenderly formed in a manner that includes the winding width of the package 22. As a result, the suction flow can act on the entire winding width direction of the outer peripheral surface of the package 22.

[0061] With such a structure, the first catching section 30 can attract and capture the yarn end of the package 22 side into the tube 32 by the suction flow generated by the suction catching section 33 at the capturing position. In addition, by returning to the standby position, the captured yarn 14 on the package 22 side can be guided to the yarn joining device 38.

[0062] In this embodiment, the first capture part 30 has a gate (not shown) at the connection portion between the tube part 32 and the duct 191. The gate opens and closes the flow path from the tube part 32 to the duct 191. Specifically, when the gate closes the flow path, the suction flow cannot be generated in the suction capture part 33. On the other hand, when the gate opens the flow path, the suction flow can be generated in the suction capture part 33.

[0063] The output shaft of the second motor 39 is connected to the first capture unit 30. The second motor 39 is electrically connected to the unit control unit 50. The unit control unit 50 can control the second motor 39 to start / stop the rotation of the second motor 39 or change the rotation direction.

[0064] In addition, a yarn detection sensor (first detection unit) 43 is provided in the yarn winding device 10. The yarn detection sensor 43 is arranged in the vicinity of the winding section 17. The yarn detection sensor 43 detects whether the first capturing section 30 captures the yarn 14. Specifically, the yarn detection sensor 43 detects whether the yarn 14 (yarn end) exists inside the tube section 32. The yarn detection sensor 43 is electrically connected to the unit control section 50. The yarn detection sensor 43 is configured as, for example, a known optical sensor having a light projecting section and a light receiving section not shown. A portion of the tube section 32 is configured by a transparent member that can transmit light. When the first capturing section 30 is located in the upper yarn capturing position ( Figure 2 When the yarn 14 is present in the tube 32, the light receiving section of the yarn detecting sensor 43 can receive the light reflected by the yarn 14. If the yarn detecting sensor 43 detects the presence of the yarn 14 (yarn end) in the tube 32, the yarn detecting sensor 43 outputs a yarn detection signal to the unit control section 50.

[0065] The yarn winding device 10 has a second catching portion 34 on the upstream side of the yarn joining device 38 in the traveling direction of the yarn 14 during yarn winding. The second catching portion 34 has a shaft portion 35, a tube portion 36, and a suction catching portion 37, similarly to the first catching portion 30 described above. The suction catching portion 37, similarly to the suction catching portion 33 of the first catching portion 30, can rotate around the shaft portion 35 as the rotation center, and can generate a suction flow by suction. With this structure, the second catching portion 34 can capture the yarn end of the yarn 14 on the yarn supply portion 15 side by the suction flow, and guide the captured yarn 14 on the yarn supply portion 15 side to the yarn joining device 38. In addition, in the following description, the yarn 14 on the yarn supply portion 15 side is sometimes referred to as the lower yarn, and the yarn end of the lower yarn is sometimes referred to as the lower yarn end.

[0066] In addition, similarly to the first capturing section 30 , the second capturing section 34 may include a gate at a connection portion between the tube section 36 and the duct 191 , for example, in order to control whether or not the above-mentioned suction flow is generated.

[0067] (3) Package forming process

[0068] Next, refer to Figure 2 to Figure 4 , the operation of the yarn winding device 10 in the winding step will be described. Figure 3 This is a flowchart showing the flow of processing performed in the yarn winding device 10 to form the package 22. Figure 4 is a flowchart showing the processing flow of the first control and the second control. It should be noted that Figure 3 and Figure 4 The flowchart shown is only an example and can be changed appropriately within the scope of non-contradiction. For example, other steps not shown in the figure can be included before and after each step, and the order of each step can be changed appropriately within the scope of non-contradiction. In addition, in the following description, the rotation of the yarn 14 of the package 22 in the winding direction is called positive rotation, and the rotation in the unwinding direction is called reverse rotation.

[0069] When performing the winding process of winding the yarn 14 on the package 22, the unit control section 50 determines whether the yarn 14 is disconnected in the yarn travel path from the yarn supply section 15 to the winding section 17 (step S1). In the present embodiment, the unit control section 50 determines whether the yarn 14 is disconnected based on whether a yarn presence signal indicating the presence of the yarn 14 is input from the yarn clearer 40. As the reason why the yarn 14 becomes disconnected, there can be cited a case where the yarn clearer 40 detects a yarn defect and the yarn 14 is cut by the cutter 41, a case where the yarn 14 is cut due to accidental high tension, and the like. Alternatively, it can be determined whether the yarn 14 is disconnected based on a cut signal when the yarn 14 is cut by the cutter 41. When the yarn 14 is disconnected in the yarn winding device 10, the upper yarn end of the disconnected yarn 14 is wound around the inertially rotating package 22.

[0070] When it is determined that the yarn 14 is not disconnected ("No" in step S1), the unit control section 50 rotates the package 22 at a predetermined winding speed (the rotation speed of the package 22 when winding the yarn 14) (step S5). Thus, the yarn 14 is wound to form the package 22.

[0071] On the other hand, when it is determined that the yarn 14 is broken (YES in step S1), the unit control section 50 executes catching control of the upper yarn end by the first catching section 30 (step S2).

[0072] The operation of the capture control (step S2) will be described in detail.

[0073] The unit control unit 50 controls the first motor 21 to stop the rotation of the package 22. In addition, the unit control unit 50 sends a drive signal to the second motor 39 to control the tube 32 of the first capture unit 30 to rotate upward. As a result, the suction capture unit 33 reaches Figure 2 The upper yarn capture position is shown by the dotted line.

[0074] When the suction and catching portion 33 reaches the upper yarn catching position, the unit control portion 50 sends a signal to the first motor 21 to reversely rotate the package 22. The unit control portion 50 controls the rotation speed so that the package 22 reversely rotates at a first speed. The first speed is preferably 100 rpm or more and 150 rpm or less. The unit control portion 50 reversely rotates the package 22 by a predetermined rotation amount while moving the tube portion 32 to the upper upper yarn catching position.

[0075] In addition, the unit control section 50 opens a gate disposed in a path connecting the tube section 32 and the duct 191. As a result, the suction and capture section 33 can act on the surface of the package 22 at a position approximately facing each other in a state where a predetermined interval is separated from the surface of the package 22, so that the suction flow acts on the surface of the package 22. The package 22 is reversely rotated while the suction and capture section 33 causes the suction flow to act on the surface of the package 22, thereby promoting the unwinding of the upper yarn from the package 22 and the suction of the upper yarn end by the suction and capture section 33. When the upper yarn end on the surface of the package 22 passes through the portion facing the suction and capture section 33, it is sucked into the tube section 32 by the suction air flow. The unit control section 50 repeats the capture control until a predetermined number of times is reached. The predetermined number of times may be one or more times.

[0076] The unit control section 50 determines whether the first catching section 30 has successfully caught the upper yarn end based on the yarn detection signal output by the yarn detection sensor 43 (step S3). When a signal indicating that the yarn 14 is inside the tube section 32 is input from the yarn detection sensor 43, the unit control section 50 ends the processing of step S1 even in the middle.

[0077] When it is determined that the first catching section 30 has successfully caught the upper yarn end (YES in step S3), the unit control section 50 controls the yarn joining device 38 to perform the yarn joining (step S4).

[0078] Specifically, the unit control unit 50 causes the package 22 to continue to rotate in the reverse direction at the first speed, and sends a drive signal to the second motor 39 to rotate the tube 32 downward to move to the first speed. Figure 2 Thus, the upper yarn captured by the first capturing portion 30 is guided to the yarn joining device 38.

[0079] On the other hand, the lower yarn end of the disconnected yarn 14 is captured by the suction airflow generated in the suction and catching portion 37 of the second catching portion 34. After the lower yarn end is captured, the unit control portion 50 rotates the tube portion 36 upward to move to the Figure 2 Thus, the lower yarn captured by the second capturing portion 34 is guided to the yarn joining device 38.

[0080] The unit control section 50 performs yarn joining between the upper yarn and the lower yarn using the yarn joining device 38 (step S4). The unit control section 50 closes the gate disposed in the path connecting the tube section 32 and the duct 191 to stop the suction flow in the suction and catching section 33.

[0081] After the yarn joining is performed by the yarn joining device 38, the unit control section 50 sends a drive signal to the first motor 21 to rotate the package 22 forward. Thus, the yarn 14 is wound around the package 22 (step S5).

[0082] When it is determined that the first catching section 30 has failed to catch the upper yarn end ("No" in step S3), the unit control section 50 starts the first control and the second control. Figure 4 The second control is composed of steps S71 to S77. Figure 4 It consists of steps S78 to S79.

[0083] The unit control unit 50 performs the first rotation control after temporarily stopping the reverse rotation of the package 22. The first rotation control includes control to reversely rotate the package 22. Specifically, for example, as the first rotation control, the package 22 is rotated forwardly, and then a signal is sent to the first motor 21 to switch the rotation direction of the package 22 and reversely rotate the package 22 (step S71). At this time, the unit control unit 50 controls the rotation speed so that the package 22 rotates forwardly at the third speed. The third speed is faster than the first speed. The third speed is, for example, greater than 4500 rpm and less than 7000 rpm. After rotating the package 22 forwardly at the third speed for a prescribed time, the unit control unit 50 reversely rotates the package 22 at the first speed and attempts to capture the upper yarn end by the first capture unit 30. The unit control unit 50 repeatedly attempts to capture the upper yarn end accompanied by high-speed forward and reverse rotation of the package 22 until a prescribed number of times is reached. The prescribed number of times may be one or more times. At this time, there is a possibility that the upper yarn end on the package 22 side may penetrate from below the yarn 14 wound around the package 22, causing yarn leakage.

[0084] Figure 5 2 is a diagram schematically showing a package 22 in a state where a yarn drill is generated. Due to the high-speed positive rotation of the package 22, the yarn 14 ( Figure 5The solid line) is relaxed, and the yarn 14 near the upper yarn end ( Figure 5 The dotted line) penetrates under the yarn 14 wound on the package 22.

[0085] The unit control section 50 monitors the signal input from the yarn detection sensor 43 at an appropriate timing each time the upper yarn end is tried to be caught. When the signal indicating that the yarn 14 is inside the tube section 32 is input from the yarn detection sensor 43, the unit control section 50 ends the processing of step S71 even in the middle.

[0086] Then, the unit control section 50 determines whether or not the first catching section 30 has successfully caught the upper yarn end based on the yarn detection signal output by the yarn detection sensor 43 (step S72).

[0087] In the case where it is determined that the first catching unit 30 has failed to catch the upper yarn end even after trying to catch the upper yarn end with the high-speed forward rotation and reverse rotation of the package 22 for a predetermined number of times (in the case of "No" in step S72), the unit control unit 50 sends a signal to the first motor 21 to end the high-speed forward rotation and reverse rotation of the package 22. Thereafter, the unit control unit 50 performs the first rotation control again. The first rotation control is a control including causing the package 22 to rotate reversely. Specifically, for example, as the first rotation control, the package 22 is caused to perform an alternating rotation motion of alternating forward rotation and reverse rotation (step S73).

[0088] At this time, the unit control section 50 first sends a signal to the first motor 21 to rotate the package 22 forward. After rotating the package 22 by a predetermined amount, the unit control section 50 sends a signal to the first motor 21 to switch the rotation direction of the package 22 and rotate the package 22 reversely by a predetermined amount. The unit control section 50 causes the package 22 to perform an alternate rotation motion, and attempts to capture the upper yarn end with the first catching section 30. The unit control section 50 controls the rotation time and rotation speed of the package 22 so that the amount of reverse rotation is greater than the amount of forward rotation in one alternate rotation motion. Specifically, the unit control section 50 controls the rotation time and rotation speed of the package 22 so that the amount obtained by subtracting the amount of forward rotation from the amount of reverse rotation is at least the amount of one cycle of the package 22. Thus, the suction of the first catching section 30 can act on the entire cycle of the package 22. The unit control section 50 causes the package 22 to perform an alternate rotation motion while moving the tube section 32 to the upper upper yarn catching position. While the suction and catching section 33 causes the suction airflow to act on the surface of the package 22, the package 22 performs an alternating rotational motion, thereby promoting the unwinding of the upper yarn from the package 22 and the suction and catching section 33 of the upper yarn end.

[0089] When the upper yarn end is not captured by the first capturing unit 30 even after the package 22 is rotated alternately for a predetermined number of times, the unit control unit 50 temporarily stops the rotation of the package 22, and then rotates the package 22 alternately again, and attempts to capture the upper yarn end by the first capturing unit 30. The unit control unit 50 repeatedly attempts to capture the upper yarn end accompanied by the alternate rotation of the package 22 until the predetermined number of times is reached. The predetermined number of times may be one or more times. At this time, the upper yarn end on the package 22 side may get under the yarn 14 wound on the package 22, causing yarn leakage.

[0090] The unit control section 50 monitors the signal input from the yarn detection sensor 43 at an appropriate timing each time the upper yarn end is tried to be caught. When a signal indicating that the yarn 14 is inside the tube section 32 is input from the yarn detection sensor 43, the unit control section 50 ends the processing of step S73 even in the middle.

[0091] Then, the unit control section 50 determines whether or not the first catching section 30 has successfully caught the upper yarn end based on the yarn detection signal output by the yarn detection sensor 43 (step S74).

[0092] In the case where it is determined that the first catching unit 30 has failed to catch the upper yarn end even after trying to catch the upper yarn end accompanied by the alternating rotation movement for a specified number of times ("No" in step S74), the unit control unit 50 sends a signal to the first motor 21 to end the alternating rotation movement of the package 22.

[0093] The unit control section 50 determines that there is a possibility that the yarn 14 may fail to be captured, displays the abnormality (second abnormality) on the display 12a, and notifies the operator (step S75). The second abnormality is, for example, an abnormality indicating that the yarn 14 is not peeled off from the surface of the package 22. That is, since it can be distinguished from the first abnormality described later, the operator can perform operations based on the content of the abnormality. For example, the identification name of the yarn winding device 10 in which the abnormality has occurred and the content of the abnormality (the possibility of yarn capture failure) are displayed on the display 12a. In addition, an alarm sound can be emitted to notify the operator that the abnormality has occurred.

[0094] When it is determined that the first catching section 30 has successfully caught the upper yarn end ("Yes" in step S72 or step S74), the unit control section 50 continues to rotate the package 22 in the reverse direction and rotates the pipe section 32 to a predetermined position ( Figure 2 In other words, the unit control section 50 moves (separates) the suction and catching section 33 to a position at a predetermined distance from the package 22. At this time, the yarn detection sensor 43 and the yarn clearer 40 cannot detect the yarn 14 caught by the first catching section 30.

[0095] Then, the unit control section 50 continues the reverse rotation of the package 22, and sends a signal to the first motor 21 to perform a second rotation control to reversely rotate the package 22 at a second speed faster than the first speed (step S77). The second speed is a speed greater than 4 times and less than 9 times the first speed. When the second speed is low, the yarn 14 may be wound onto the package 22 even when a yarn runout occurs. On the other hand, when the second speed is too high, the yarn 14 may be wound onto the package 22 due to hooking of burrs, etc., even when a yarn runout does not occur. In addition, since the yarn 14 captured and attracted by the attraction and capture section 33 becomes longer, productivity is reduced. Specifically, the second speed is preferably greater than 600 rpm and less than 900 rpm, and more preferably 800 rpm. After a predetermined time, the unit control section 50 continues the reverse rotation of the package 22 at the first speed, and rotates the tube section 32 downward to guide the upper yarn to the yarn joining device 38.

[0096] In the case where no yarn has been twisted, the yarn 14 of the package 22 is unwound by rotating the package 22 in reverse, so that the upper yarn is guided to the yarn joining device 38 while being caught by the suction and capture portion 33. However, in the case where a yarn has been twisted, the yarn 14 is not unwound because the yarn has been caught on the surface of the package 22. As the package 22 rotates in reverse, the yarn 14 is reversely wound around the package 22 starting from the position where the yarn has been twisted. As a result, the upper yarn caught by the suction and capture portion 33 is pulled toward the package 22, so that the upper yarn escapes from the inside of the suction and capture portion 33. As a result, the upper yarn is not guided to the yarn joining device 38.

[0097] After the first control, in the second control, the unit control section 50 determines whether the yarn 14 is present based on the yarn presence signal output by the yarn clearer 40 (step S78). Specifically, when the upper yarn and the lower yarn are guided to the yarn joining device 38, since the yarn 14 exists in the yarn travel path between the yarn supply section 15 and the winding section 17, the yarn clearer 40 outputs the yarn presence signal to the unit control section 50. On the other hand, when the upper yarn and the lower yarn are not guided to the yarn joining device 38, the yarn clearer 40 does not output the yarn presence signal.

[0098] When it is determined that the yarn 14 is present (YES in step S78), the unit control section 50 ends the first control and the second control and causes the yarn joining device 38 to perform the yarn joining (step S4).

[0099] When it is determined that there is no yarn 14 ("No" in step S78), the unit control section 50 determines that there is a possibility of yarn leakage, displays the abnormality (first abnormality) on the display 12a, and notifies the operator (step S79). For example, the identification name of the yarn winding device 10 in which the abnormality has occurred and the content of the abnormality (the possibility of yarn leakage) are displayed on the display 12a. In addition, an alarm sound may be emitted to notify the operator of the abnormality.

[0100] The unit control section 50 terminates the processing ("Yes" in step S6) when, for example, other abnormalities occur in the yarn winding device 10 that require the winding of the yarn 14 to be stopped, or when the operator instructs the yarn winding device 10 to be stopped. If such a situation does not occur ("No" in step S6), the unit control section 50 repeatedly executes the above-mentioned steps S1 to S5 until the winding of the yarn 14 is completed.

[0101] (4) Process of the First Rotation Control and the Second Rotation Control

[0102] Next, refer to Figure 6 The timing chart shown in FIG. 1 will explain the operation of the yarn winding device 10 in the first rotation control and the second rotation control. Figure 6 This is an example of a timing chart showing the operation of each section of the yarn winding device 10 after the yarn 14 that has been broken during the formation of the package 22 fails to be caught and the first rotation control is started.

[0103] At time t1, the unit control section 50 rotates the tube section 32 of the first catching section 30 upward. Then, when the tube section 32 reaches the upper yarn catching position, at time t2, the unit control section 50 rotates the package 22 in the reverse direction. Thus, the first catching section 30 is tested for catching the upper yarn end. Figure 6 In the example shown, the package 22 is in a stopped state before time t2, but the package 22 is not limited to the stopped state. Specifically, for example, when the package 22 is rotated forward and reversely at high speed as the first rotation control, the package 22 may be rotated forward before time t2. Also, for example, when the package 22 is rotated alternately as the first rotation control, the package 22 may be rotated forward or reverse before time t2.

[0104] At time t3 after a predetermined time, when the yarn detection sensor 43 detects the yarn 14 (changes from an OFF signal to an ON signal), at time t4, the unit control section 50 rotates the pipe section 32 to a predetermined position ( Figure 2), so that the suction and catching section 33 is spaced a predetermined distance from the package 22. Then, at time t5, the unit control section 50 causes the package 22 to rotate in reverse at a second speed faster than the first speed. Thus, in a state where the first catching section 30 catches the upper yarn end at a position separated from the package 22, the package 22 rotates in reverse at a high speed.

[0105] At time t6 after a predetermined time, the unit control section 50 continues the reverse rotation of the package 22 and changes the rotation speed to the first speed, and rotates the pipe section 32 downward to guide the upper yarn to the yarn joining device 38.

[0106] When the upper and lower yarns are guided to the yarn joining device 38, the yarn 14 exists in the yarn travelling path between the yarn supplying section 15 and the winding section 17. Therefore, the yarn clearer 40 outputs a yarn signal (ON signal) to the unit control section 50 at time t7.

[0107] 2. Features of the embodiment

[0108] The yarn winding device 10 of the present embodiment includes a yarn supply section 15, a winding section 17, a yarn joining device 38, a first catching section 30, a second catching section 34, a yarn detection sensor 43, a yarn clearer 40, and a unit control section 50. The yarn supply section 15 supplies the yarn 14. The winding section 17 winds the yarn 14 supplied from the yarn supply section 15 to form a package 22. The yarn joining device 38 joins the yarn 14 on the package 22 side with the yarn 14 on the yarn supply section 15 side. The first catching section 30 catches the yarn end on the package side and guides the yarn to the yarn joining device 38. The second catching section 34 catches the yarn end on the yarn supply section side and guides the yarn to the yarn joining device 38. The yarn detection sensor 43 and the yarn clearer 40 detect the yarn 14 caught by the first catching section 30. The unit control section 50 performs the first control and the second control. In the first control, the first catching section 30 catches the yarn 14 while the first rotation control including the action of rotating the package 22 in the unwinding direction of the yarn 14 is being executed, and then, when the yarn 14 is detected by the yarn detection sensor 43, the second rotation control is executed to further rotate the package 22 in the unwinding direction of the yarn 14. In the second control, when the yarn clearer 40 does not detect the yarn 14 after the first control, the first abnormality is notified.

[0109] The yarn winding device 10 notifies an abnormality when there is a possibility that a yarn leak occurs, thereby reducing the yarn 14 from being wound around the package 22 in a state where a yarn leak occurs. Thus, the quality of the package 22 is improved.

[0110] In the yarn winding device 10 of the present embodiment, the unit control section 50 also performs a catching control. In the catching control, the first catching section 30 catches the yarn 14 while rotating the package 22 at a first speed in the unwinding direction of the yarn 14, and then the yarn 14 is detected by the yarn detection sensor 43. The first control is a control performed when the yarn 14 is not detected as a result of the catching control, and the rotation speed of the package 22 in the second rotation control is a second speed that is faster than the first speed.

[0111] When the first catching section 30 fails to catch the yarn 14 during the catching control, the yarn winding device 10 performs the first control. In the second rotation control, the package 22 is reversely rotated at a speed faster than the rotation speed during the catching control. This improves the detection accuracy of the occurrence of the yarn leakage.

[0112] When the yarn 14 is detected as a result of the catching control, the unit control section 50 of the yarn winding device 10 of the present embodiment rotates the package 22 in the unwinding direction of the yarn 14 at the first speed.

[0113] In the yarn winding device 10, when the first catching section 30 successfully catches the yarn 14 during catching control, the package 22 is rotated in the unwinding direction of the yarn 14 while maintaining the first speed. Thus, the amount of the yarn 14 sucked by the first catching section 30 can be reduced.

[0114] In the yarn winding device 10 of the present embodiment, as the first rotation control, the unit control section 50 rotates the package 22 in the winding direction of the yarn 14 at a third speed faster than the first speed, and then rotates the package in the unwinding direction of the yarn at the first speed.

[0115] In the yarn winding device 10, the yarn 14 on the package 22 side can be caught efficiently.

[0116] In the yarn winding device 10 of the present embodiment, the unit control section 50 causes the package 22 to perform an alternating rotational motion that alternately performs a forward rotation in the winding direction of the yarn 14 and a reverse rotation in the unwinding direction as the first rotation control.

[0117] In the yarn winding device 10, the yarn 14 on the package 22 side can be caught efficiently.

[0118] In the yarn winding device 10 of the present embodiment, the unit control section 50 separates the first catching section 30 from the package 22 before executing the second rotation control.

[0119] In the yarn winding device 10, since the suction of the first catching portion 30 does not act on the yarn 14 wound around the package 22, when the package 22 is reversely rotated, the yarn 14 is easily wound around the package 22. This improves the detection accuracy of the yarn 14.

[0120] In the yarn winding device 10 of the present embodiment, when the yarn 14 is not detected by the yarn detection sensor 43 or the yarn clearer 40 during the first control, the unit control section 50 notifies the second abnormality.

[0121] In the yarn winding device 10, the case where the yarn 14 cannot be caught in the first control (catching failure) and the case where the yarn 14 cannot be caught in the second control (there is a possibility of yarn jamming) can be distinguished and abnormalities can be notified.

[0122] 3. Modifications

[0123] In the following description, only the configuration different from that of the present embodiment will be described.

[0124] (1) Modification A

[0125] The second speed may be a speed that is 4 times or more and 9 times or less of the first speed.

[0126] (2) Modification B

[0127] The unit control section 50 may change the second speed based on the diameter of the package 22 .

[0128] In the yarn winding device 10, the yarn 14 can be wound at an appropriate speed and the package 22 can be rotated regardless of the diameter of the package 22.

[0129] (3) Modification C

[0130] In the present embodiment, the yarn detection sensor 43 is arranged near the winding portion 17, and detects whether the first catching portion 30 has caught the upper yarn according to whether the yarn 14 is present inside the tube portion 32. However, the yarn detection sensor 43 may not be provided. In this case, the suction catching portion 33 may be moved to the lower standby position first, and then based on the yarn presence signal output by the yarn clearer 40, it is detected whether the first catching portion 30 has caught the upper yarn.

[0131] (4) Modification D

[0132] In the present embodiment, in the second control, when it is determined that the yarn 14 exists based on the yarn existence signal output by the yarn clearer 40 (in the case of "Yes" in step S12), the unit control section 50 causes the yarn joining device 38 to perform yarn joining (step S4). However, the unit control section 50 may determine the presence or absence of the yarn 14 based on the yarn existence signal output by the yarn clearer 40 after causing the yarn joining device 38 to perform yarn joining.

[0133] (5) Modification E

[0134] In the present embodiment, when the yarn clearer 40 detects that the amount of light detected by the optical sensor is normal within a predetermined range, a yarn presence signal is output to the unit control unit 50. The unit control unit 50 determines whether the yarn 14 is disconnected based on whether the yarn presence signal indicating the presence of the yarn 14 is input from the yarn clearer 40. However, if the yarn clearer 40 detects that there is no yarn 14, a yarn absence signal is output to the unit control unit 50. The unit control unit 50 may also determine whether the yarn 14 is disconnected based on whether the yarn absence signal indicating the absence of the yarn 14 is input from the yarn clearer 40.

[0135] (6) Modification F

[0136] In the present embodiment, the yarn detecting sensor 43 is arranged near the winding portion 17 to detect the presence or absence of the yarn 14 inside the tube portion 32. However, the yarn detecting sensor 43 may be arranged inside the first catching portion 30.

[0137] In the yarn winding device 10, the presence of the yarn 14 inside the tube 32 can be constantly monitored regardless of the position of the first catching portion 30. Therefore, the presence of the yarn 14 can be determined based on the yarn detection signal output by the yarn detection sensor 43 in the second control.

[0138] (7) Modification G

[0139] The yarn detecting sensor 43 may include a light projecting portion and a light receiving portion via a transparent member, and detect the presence of the yarn 14 (yarn end) inside the tube 32 when the light receiving portion does not receive the light irradiated into the tube 32 by the light projecting portion.

[0140] (8) Modification H

[0141] In the present embodiment, in the first control, the unit control section 50 continues the reverse rotation of the package 22 as the first rotation control, and executes the second rotation control for rotating the package 22 reversely at a second speed faster than the first speed (step S77, time t5). However, the unit control section 50 may temporarily stop the reverse rotation of the package 22 before executing the second rotation control, and then execute the second rotation control for reverse rotation at the second speed again.

[0142] Figure 7 This is an example of a timing chart showing the operation of each part of the yarn winding device 10 after the first rotation control is started in this modification. Since time t1 to time t3 are the same as those in this embodiment, the description thereof will be omitted.

[0143] At time t4, the unit control unit 50 rotates the tube 32 to a predetermined position ( Figure 2 The unit control unit 50 stops the package 22. Then, at time t5, the unit control unit 50 causes the package 22 to rotate in reverse at a second speed faster than the first speed. Thus, the package 22 rotates in reverse at a high speed while the first catching unit 30 catches the upper yarn end at a position separated from the package 22. Time t6 to time t7 are the same as those in the present embodiment, and thus description thereof is omitted.

[0144] (9) Modification Example 1

[0145] In the present embodiment, in the second control, the unit control section 50 determines the presence or absence of the yarn 14 based on the yarn presence signal output by the yarn clearer 40 (step S78). However, the unit control section 50 may also determine the presence or absence of the yarn 14 based on the yarn detection signal output by the yarn detection sensor 43. In this case, the unit control section 50 may also rotate the tube section 32 to the upper yarn catching position ( Figure 2 The yarn 14 is detected by the yarn detection sensor 43.

[0146] (10) Modification J

[0147] In the present embodiment, in the second control, the unit control section 50 determines the presence or absence of the yarn 14 based on the yarn presence signal output by the yarn clearer 40 (step S78). However, the unit control section 50 may determine the presence or absence of the yarn 14 based on the yarn detection signal output by the yarn detection sensor 43. In this case, the unit control section 50 may not move (separate) the suction and capture section 33 to a position at a predetermined interval from the package 22.

[0148] In the yarn winding device 10, the unit control section 50 does not need to move the position of the suction and catching section 33 in the first control and the second control, so the control is simplified.

[0149] (11) Modification K

[0150] In this embodiment, high-speed forward rotation and reverse rotation (step S71) and alternating rotation (step S73) are performed as the first rotation control. However, only high-speed forward rotation and reverse rotation may be performed as the first rotation control. Figure 8: is a flowchart showing the processing flow of the first control and the second control in this modification. It should be noted that Figure 8 The flowchart shown is only an example and can be appropriately changed within the scope of non-contradiction. For example, other steps not shown in the figure can be included before and after each step, and the order of each step can be appropriately changed within the scope of non-contradiction. Figure 8 The second control is composed of steps S271 to S275. Figure 8 It consists of steps S276 to S277.

[0151] Step S271 and Figure 4 The process is the same as step S71, so the description is omitted.

[0152] In the case where it is determined that the first catching unit 30 has failed to capture the upper yarn end even after attempting to capture the upper yarn end during the high-speed forward rotation and reverse rotation of the package 22 for a specified number of times ("No" in step S272), the unit control unit 50 sends a signal to the first motor 21 to end the high-speed forward rotation and reverse rotation of the package 22.

[0153] The unit control section 50 determines that there is a possibility that the yarn 14 may fail to be captured, displays the abnormality (second abnormality) on the display 12a, and notifies the operator (step S273). For example, the identification name of the yarn winding device 10 in which the abnormality has occurred and the content of the abnormality (the possibility of yarn capture failure) are displayed on the display 12a. In addition, an alarm sound may be emitted to notify the operator of the abnormality.

[0154] When it is determined that the first catching section 30 has successfully caught the upper yarn end (YES in step S272), the unit control section 50 continues the reverse rotation of the package 22 and rotates the pipe section 32 to a predetermined position ( Figure 2 single dot dash line) (step S274).

[0155] Steps S275 to S277 and Figure 4 Steps S77 to S79 ​​are the same, so their description is omitted.

[0156] (12) Modification Example L

[0157] As the first rotation control, only the alternating rotation motion may be performed. Fig. 9 : is a flowchart showing the processing flow of the first control and the second control in this modification. It should be noted that Fig. 9The flowchart shown is only an example and can be appropriately changed within the scope of non-contradiction. For example, other steps not shown in the figure can be included before and after each step, and the order of each step can be appropriately changed within the scope of non-contradiction. In this modified example, the first control is Fig. 9 The second control is composed of steps S371 to S375. Fig. 9 It consists of steps S376 to S377.

[0158] After temporarily stopping the reverse rotation of the package 22, the unit control unit 50 performs the first rotation control. The first rotation control includes the control of reversely rotating the package 22. As the first rotation control, the unit control unit 50 causes the package 22 to perform an alternating rotation motion (step S371), and the alternating rotation motion alternately performs forward rotation and reverse rotation. The details of the alternating rotation motion are the same as those of step S73 of the present embodiment, and therefore the description thereof is omitted.

[0159] Steps S372 to S377 and Figure 4 Steps S74 to S79 ​​are the same, so their description is omitted.

[0160] (13) Modification M

[0161] In this embodiment, the first rotation control includes high-speed forward rotation and reverse rotation (step S71) and alternating rotation (step S73) of the package 22. However, the first rotation control may include only reverse rotation of the package 22. Fig.10 : is a flowchart showing the processing flow of the first control and the second control in this modification. It should be noted that Fig.10 The flowchart shown is only an example and can be appropriately changed within the scope of non-contradiction. For example, other steps not shown in the figure can be included before and after each step, and the order of each step can be appropriately changed within the scope of non-contradiction. In this modified example, the first control is Fig.10 The second control is composed of steps S471 to S475. Fig.10 It consists of steps S476 to S477.

[0162] The unit control section 50 performs the first rotation control after temporarily stopping the reverse rotation of the package 22. The first rotation control includes control for reversely rotating the package 22. As the first rotation control, the unit control section 50 reversely rotates the package 22 (step S471). The unit control section 50 reversely rotates the package 22 and attempts to capture the upper yarn end with the first catching section 30.

[0163] Steps S472 to S477 and Figure 4 Steps S74 to S79 ​​are the same, so their description is omitted.

[0164] (14) Modification N

[0165] In this embodiment, the unit control unit 50 rotates the tube 32 to a predetermined position ( Figure 2 After that, a signal is sent to the first motor 21 to execute the second rotation control (step S77, time t5) to make the package 22 rotate in the reverse direction at a second speed faster than the first speed. However, at time t5, the unit control unit 50 may also maintain the first speed and continue the reverse rotation of the package 22.

[0166] 4. Other Implementation Methods

[0167] An embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention. In particular, the multiple embodiments and modifications described in this specification can be arbitrarily combined as needed.

[0168] Industrial applicability

[0169] The yarn winding device of the present disclosure can be applied to an automatic winder, an air spinning machine, and an open-end spinning machine in which a plurality of yarn winding devices are used in parallel. In addition, the yarn winding device of the present disclosure can be applied to a fiber machine that manufactures a wide range of fibers.

Claims

1. A yarn winding device, wherein: have: A yarn supplying section, supplying yarn; a winding section that winds the yarn supplied from the yarn supply section to form a package; a yarn joining device for joining the yarn on the package side with the yarn on the yarn supplying portion side; a first catching portion, catching the yarn end on the package side and guiding the yarn to the yarn joining device; a second catching portion, catching the yarn end on the yarn supplying portion side and guiding the yarn to the yarn joining device; a detection section that detects the yarn captured by the first capturing section; and Control Department, The control unit performs a first control and a second control, In the first control, the first catching section catches the yarn while the first rotation control including the action of rotating the package in the unwinding direction of the yarn is being executed, and then, when the yarn is detected by the detection section, the second rotation control is executed to further rotate the package in the unwinding direction of the yarn. In the second control, when the yarn is not detected by the detection section after the first control, a first abnormality is notified.

2. The yarn winding device according to claim 1, wherein: The control section further performs the following catching control: in a state where the package is rotated at a first speed in the unwinding direction of the yarn, the first catching section catches the yarn and the detection section detects the yarn, The first control is performed when the yarn is not detected as a result of the catching control, and the rotation speed of the package in the second rotation control is a second speed faster than the first speed.

3. The yarn winding device according to claim 2, wherein: The control section rotates the package in the unwinding direction of the yarn at the first speed when the yarn is detected as a result of the catching control.

4. The yarn winding device according to claim 2 or 3, wherein: The second speed is a speed that is 4 times or more and 9 times or less of the first speed.

5. The yarn winding device according to any one of claims 2 to 4, wherein: The control section changes the second speed based on the diameter of the package.

6. The yarn winding device according to any one of claims 2 to 5, wherein: As the first rotation control, the control section rotates the package in the winding direction of the yarn at a third speed faster than the first speed, and then rotates the package in the unwinding direction of the yarn at the first speed.

7. The yarn winding device according to any one of claims 1 to 6, wherein: As the first rotation control, the control section causes the package to perform an alternating rotational motion in which the package alternately performs a forward rotation in a winding direction of the yarn and a reverse rotation in an unwinding direction.

8. The yarn winding device according to any one of claims 1 to 7, wherein: The control section separates the first catching section from the package before executing the second rotation control.

9. The yarn winding device according to any one of claims 1 to 8, wherein: The detection unit has: a first detection section for detecting the yarn inside the first capturing section; as well as a second detection section for detecting the yarn in a yarn travelling path of the yarn between the yarn supply section and the winding section, The control section causes the first detection section to detect the yarn in the first control, and causes the second detection section to detect the yarn in the second control.

10. The yarn winding device according to any one of claims 1 to 9, wherein: The control section notifies a second abnormality when the yarn is not detected by the detection section during the first control.

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