Yarn winding device

Abstract

To improve the quality of a package.SOLUTION: A yarn winding device 10 includes a yarn supplying part 15, a winding part 17, a yarn splicing device 38, a first capturing part 30, a second capturing part 34, detection parts 40 and 43, and a control part 50. The control part 50 performs first control and second control. In the first control, in a state of executing first rotation control which includes rotating (reverse rotating) a package 22 in an unwinding direction of a yarn 14, the first capturing part 30 captures a yarn end of a package side, and then, if the yarn is detected by the detection parts 40 and 43, second rotation control which further rotates the package 22 in the unwinding direction of the yarn 14 is executed. In the second control, if the detection parts 40 and 43 do not detect the yarn after the first control, a first abnormality is notified.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a yarn winding device. [Background technology]

[0002] A yarn winding device that winds a yarn unwound from a yarn supplying bobbin to form a package is known. When a yarn breakage occurs between the yarn supplying bobbin and the package, this type of yarn winding device sucks and captures the yarn on the package side using a suction mouth and guides it to a yarn joining device, which then joins the yarn.

[0003] In the yarn winding device of Patent Document 1, the upper yarn catching and guiding device moves from a standby position to a catching position on the package side to suck in and catch the upper yarn, which is the yarn on the package side.The upper yarn catching and guiding device then returns to the standby position to guide the upper yarn to the yarn joining device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2015 / 029275 Summary of the Invention [Problem to be solved by the invention]

[0005] When a yarn break occurs between the yarn supplying bobbin and the package, the yarn end on the package side may pass under the yarn wound around the package. When the yarn end on the package side passes under the yarn wound around the package in this way, it is called a "passing yarn." If the yarn is wound around the package in a state where a passing yarn occurs, the quality of the package will deteriorate.

[0006] An object of the present invention is to reduce the occurrence of a yarn being wound into a package in a yarn winding device in a state where a yarn is trapped, thereby improving package quality. [Means for solving the problem]

[0007] In the following, several aspects will be described as means for solving the problems. These aspects can be arbitrarily combined as necessary.

[0008] The yarn winding device of the present disclosure includes 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 the 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 to 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 first and second controls. In the first control, while a first rotation control including rotating the package in the yarn unwinding direction (reverse rotation) is being performed, the first catching section is caused to catch the yarn, and then, if the detection section detects the yarn, a second rotation control is performed to further rotate the package in the yarn unwinding direction. In the second control, if the yarn is not detected by the detection unit after the first control, a first abnormality is reported.

[0009] This yarn winding device notifies the user of an abnormality when there is a possibility that a sneaking yarn has occurred, thereby reducing the occurrence of the yarn being wound into a package in a sneaking state, thereby improving the quality of the package.

[0010] The control unit may further perform capture control. In the capture control, while the package is rotated in the yarn unwinding direction at a first speed, the first capture unit captures the yarn and the detection unit detects the yarn. The first control is a control that is performed when the yarn is not detected as a result of the capture control, and the rotation speed of the package in the second rotation control may be a second speed that is faster than the first speed.

[0011] This yarn winding device performs a first control when the first capture unit fails to capture the yarn in the capture control. In the second rotation control, the package is rotated in the reverse direction at a speed faster than the rotation speed in the capture control. This improves the accuracy of detecting the occurrence of a passing yarn.

[0012] When the yarn is detected as a result of the capture control, the control unit may rotate the package in the yarn unwinding direction at a first speed.

[0013] In this yarn winding device, when the first catching unit succeeds in catching the yarn during catching control, the package is rotated in the yarn unwinding direction at the first speed, thereby reducing the amount of yarn sucked in by the first catching unit.

[0014] The second speed may be greater than or equal to three times and less than or equal to six times the first speed.

[0015] The control unit may vary the second speed based on a diameter of the package.

[0016] This yarn winding device can rotate the package at an appropriate speed regardless of the diameter of the package.

[0017] Prior to the first control, the control unit may rotate the package in the yarn winding direction at a third speed faster than the first speed.

[0018] In this yarn winding device, the yarn on the package side can be efficiently captured before the first control.

[0019] Before the first control, the control unit may cause the package to perform an alternating rotational motion in which the package alternates between a forward rotation in the yarn winding direction and a reverse rotation in the yarn unwinding direction.

[0020] In this yarn winding device, the yarn on the package side can be efficiently captured before the first control.

[0021] The control unit may move the first capture unit away from the package before executing the second rotation control.

[0022] In this yarn winding device, the suction by the first capture unit does not act on the yarn wound on the package, so when the package is rotated in reverse, the sneaky yarn is easily wound onto the package, improving the accuracy of detecting the occurrence of the sneaky yarn.

[0023] The detection unit may have a first detection unit and a second detection unit. The first detection unit detects the yarn inside the first catching unit. The second detection unit detects the yarn in a yarn traveling path of the yarn between the yarn supplying unit and the winding unit. The control unit may 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.

[0024] The control unit may notify a second abnormality when the yarn is not detected by the detection unit in the first control.

[0025] This yarn winding device can distinguish between a case where the yarn cannot be captured in the first control (when capture fails) and a case where the yarn cannot be captured in the second control (when there is a possibility that a sneaky yarn has occurred), and can notify of an abnormality. Effect of the Invention

[0026] The yarn winding device according to the present invention improves the package quality. [Brief description of the drawings]

[0027] [Figure 1] FIG. 2 is a diagram showing the configuration of an automatic winder. [Diagram 2] FIG. 2 is a diagram showing a configuration of a yarn winding device. [Diagram 3] 10 is a flowchart showing a process for forming a package. [Figure 4] 4 is a flowchart showing a process flow of a first control and a second control. [Diagram 5] FIG. 13 is a diagram showing a package in which a burrowing thread has occurred. [Figure 6]4 is a timing chart of the first rotation control and the second rotation control. [Figure 7] 13 is a timing chart of the first rotation control and the second rotation control in modification H. [Figure 8] 13 is a flowchart showing the process flow of the first control and the second control in the modification K. [Figure 9] 13 is a flowchart showing a process flow of the first control and the second control in the modification L. [Figure 10] 13 is a flowchart showing the process flow of the first control and the second control in the modification M. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] 1. First embodiment (1) Automatic Winder Configuration A first embodiment of the present invention will be described in detail below. First, the configuration of an automatic winder 1 according to the first embodiment will be described with reference to Fig. 1. Fig. 1 is a diagram showing the configuration of the automatic winder 1.

[0029] The automatic winder 1 includes a plurality of yarn winding devices 10 arranged side by side. Each yarn winding device 10 unwinds a yarn 14 from a yarn supplying bobbin 16 and traverses the yarn 14 to form a package 22. The configuration and operation of the yarn winding devices 10 will be described in detail later.

[0030] The automatic winder 1 includes a machine control device 12. The machine control device 12 is capable of communicating with each yarn winding device 10. An operator of the automatic winder 1 can collectively manage the multiple yarn winding devices 10 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 on the settings and / or status of the yarn winding device 10. The operator can perform settings of the yarn winding device 10 by appropriately operating the input interface 12b.

[0031] The display 12a is, for example, a display device such as a liquid crystal display. The input interface 12b is an input device such as an input key, a touch panel, etc. The display 12a and the input interface 12b, which is a touch panel, may be integrated together.

[0032] The automatic winder 1 includes a doffing device 13. When the package 22 in each yarn winding device 10 becomes full (a specified amount of yarn is wound), the doffing device 13 travels to the position of the yarn winding device 10, removes the full package, and sets an empty winding bobbin.

[0033] (2) Configuration of the yarn winding device Hereinafter, the details of the configuration of the yarn winding device 10 according to the first embodiment will be described with reference to FIG. 2. As shown in FIG. 2, the yarn winding device 10 includes a main body of the yarn winding device 10 having a yarn supplying section 15 and a winding section 17, and a unit control section (control section) 50. The yarn winding device 10 according to the first embodiment is a drum-type yarn winding device 10, but the yarn winding device 10 may be an arm traverse-type winding device or a belt traverse-type winding device. In addition, the yarn winding device 10 according to the first embodiment is mounted on an automatic winder 1, but the yarn winding device 10 may be mounted on, for example, an air spinning frame or an open-end spinning frame.

[0034] The yarn winding device 10 has a yarn supplying section 15 at the bottom. In other words, the yarn winding device 10 has the yarn supplying section 15 on the upstream side in the running direction of the yarn 14 during yarn winding. The yarn supplying section 15 supplies the yarn 14 for manufacturing the package 22 to the winding section 17. Specifically, the yarn supplying section 15 is a conveyor tray type supply mechanism that supports the yarn supplying bobbin 16 placed on a conveyor tray (not shown) at a predetermined position and supplies the yarn supplying bobbin 16 to the predetermined position. The yarn supplying section 15 is not limited to a conveyor tray type supply mechanism and may be, for example, a magazine type supply mechanism. The position of the yarn supplying section 15 is not limited to the bottom.

[0035] The yarn 14 is pulled out by the winding unit 17 from a yarn supplying bobbin 16 supported by a yarn supplying unit 15. The pulled out yarn 14 is wound into a package 22 by the winding unit 17.

[0036] The yarn winding device 10 has a winding section 17 at its upper portion. In other words, the yarn winding device 10 has the winding section 17 downstream in the running direction of the yarn 14 during yarn winding. The winding section 17 mainly includes a cradle 18 and a winding drum 20. The position of the winding section 17 is not limited to the upper portion.

[0037] The cradle 18 supports the package 22 rotatably about a predetermined axis by clamping the package 22 at both ends in the longitudinal direction with a pair of rotation support parts (not shown).

[0038] The winding drum 20 is a cylindrical member that is rotationally driven around its axis by the first motor 21. When the winding drum 20 is rotationally driven with the outer periphery of the package 22 in contact with the winding drum 20, a driving force is imparted to the package 22, causing the package 22 to rotate in accordance with the rotation of the winding drum 20.

[0039] In addition, a spiral traverse groove is formed on the cylindrical side surface of the winding drum 20. While the winding drum 20 is driven to rotate, the package 22 is rotated, and at the same time, the yarn 14 unwound from the yarn supplying bobbin 16 is traversed at a constant width on the surface of the package 22 by the traverse groove. As a result, the yarn 14 supplied by being unwound from the yarn supplying bobbin 16 is wound while being traversed on the surface of the package 22. As a result, the package 22 having a constant winding width is formed.

[0040] The yarn winding device 10 includes, in this order from the yarn supplying section 15 to the winding section 17, a yarn unwinding assisting device 25, a tensioning device 27, a yarn joining device 38, and a clearer (second detection section) 40.

[0041] The yarn unwinding assisting device 25 regulates the bulge (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 supplying bobbin 16 by lowering the movable cylinder 26, which covers the core tube of the yarn supplying bobbin 16, in conjunction with the unwinding of the yarn 14 from the yarn supplying bobbin 16. The movable cylinder 26 comes into contact with a balloon formed above the yarn supplying bobbin 16 by the rotation and centrifugal force of the yarn 14 unwound from the yarn supplying bobbin 16, and assists the unwinding of the yarn 14 by applying an appropriate tension to the balloon.

[0042] The tensioning device 27 applies a predetermined tension to the traveling yarn 14. As the tensioning device 27, for example, a gate type device in which movable comb teeth are arranged relative to fixed comb teeth can be used. The movable comb teeth are configured so that the comb teeth are in an interlocking or disengaged state. By passing the yarn 14 between the interlocking comb teeth while bending it, a constant tension can be applied to the yarn 14 being wound, thereby improving the quality of the package 22. Note that, in addition to the above gate type, for example, a disk type device can be used as the tensioning device 27.

[0043] The yarn splicing device 38 splices the yarn 14 on the yarn supplying bobbin 16 side and the yarn 14 on the package 22 side when the clearer 40 detects a yarn defect and cuts the yarn, or when the yarn breaks during unwinding from the yarn supplying bobbin 16, etc. The yarn splicing device 38 is a splicer device that twists the yarn ends together using a swirling air flow generated by compressed air, for example.

[0044] The clearer 40 monitors the state of the yarn 14 traveling on the yarn traveling path between the yarn supplying unit 15 and the winding unit 17, and detects the presence or absence of a yarn defect based on the monitored information. The clearer 40 detects, as the yarn defect, for example, an abnormality in the thickness of the yarn 14 and / or a foreign object contained in the yarn 14. The clearer 40 also detects the presence or absence of the yarn 14 on the traveling path.

[0045] Specifically, the clearer 40 has a slit in the yarn traveling path of the yarn 14 through which the yarn 14 passes, and monitors the yarn 14 passing through the slit with a sensor (not shown). For example, when the clearer 40 detects that the amount of light detected by the optical sensor is normal within a predetermined range, it outputs a yarn presence signal to the unit control unit 50.

[0046] Furthermore, for example, when the 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 yarn breakage has occurred) or is less than the above-mentioned predetermined range (the yarn 14 is too thick), it may output a yarn defect detection signal to the unit control unit 50. Note that the sensor is not limited to an optical sensor, and may be a capacitive sensor.

[0047] A cutter 41 for cutting the yarn 14 is provided near the clearer 40. The cutter 41 is actuated by the clearer 40.

[0048] The yarn winding device 10 has a first catching section 30 downstream of the yarn joining device 38 in the running direction of the yarn 14 during yarn winding. 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 cut. The first catching section 30 has a shaft section 31, a pipe section 32, and a suction catching section 33. The pipe section 32 and the suction catching section 33 are rotatable (movable) about the shaft section 31 as a rotation center from a standby position on the yarn supplying section 15 side (solid line in FIG. 2) to a catching position on the winding section 17 side (dotted line in FIG. 2). In the following description, the yarn 14 on the package 22 side may be referred to as the upper thread, and the yarn end of the upper thread may be referred to as the upper thread end.

[0049] In addition, the first catching section 30 has a suction device 19 connected to the shaft section 31 side of the pipe section 32, and can generate a suction flow at the suction catching section 33 (specifically, a suction port at the tip). As the suction device 19, for example, a system is adopted that includes a duct 191 that extends in the juxtaposition direction of the yarn winding devices 10 on the rear side of each yarn winding device 10 and has one end connected to the shaft section 31, and a suction source 193 that is connected to the other end of the duct 191 and makes the duct 191 have a predetermined negative pressure. The suction source 193 is, for example, a blower device. The suction catching section 33 is elongated so as to include the winding width of the package 22. This allows the suction flow to act on the entire outer circumferential surface of the package 22 in the winding width direction.

[0050] With this configuration, at the capturing position, the first capturing unit 30 can suck and capture the yarn end on the package 22 side into the pipe unit 32 by the suction flow generated by the suction capturing unit 33. 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.

[0051] In this embodiment, the first capturing unit 30 has a shutter (not shown) at the connection between the pipe unit 32 and the duct 191. The shutter opens and closes the flow path from the pipe unit 32 to the duct 191. Specifically, when the above flow path is closed, the shutter prevents the generation of a suction flow in the suction capturing unit 33. On the other hand, when the above flow path is opened, the shutter causes the generation of a suction flow in the suction capturing unit 33.

[0052] An output shaft of a second motor 39 is connected to the first capturing unit 30. The second motor 39 is electrically connected to a unit control unit 50. The unit control unit 50 controls the second motor 39 to start / stop the rotation of the second motor 39 and change the rotation direction.

[0053] The yarn winding device 10 is also provided with a yarn detection sensor (first detection section) 43. The yarn detection sensor 43 is disposed in the vicinity of the winding section 17. The yarn detection sensor 43 detects whether the first catching section 30 has caught the yarn 14. Specifically, the yarn detection sensor 43 detects whether the yarn 14 (yarn end) is present inside the pipe 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, and includes a light-projecting section and a light-receiving section (not shown). A part of the pipe section 32 is configured of a transparent member that can transmit light. When the first catching section 30 is at the upper yarn capturing position (dotted line in FIG. 2), the light-projecting section of the yarn detection sensor 43 can irradiate light into the inside of the pipe section 32 through the transparent member. When the yarn 14 is present inside the pipe section 32, the light-receiving section of the yarn detection sensor 43 can receive light reflected by the yarn 14. When the yarn detection sensor 43 detects the presence of the yarn 14 (yarn end) inside the pipe portion 32, it outputs a yarn detection signal to the unit control portion 50.

[0054] The yarn winding device 10 has a second catching section 34 upstream of the yarn joining device 38 in the running direction of the yarn 14 during yarn winding. The second catching section 34 has a shaft section 35, a pipe section 36, and a suction catching section 37, similar to the first catching section 30 described above. The suction catching section 37 is rotatable about the shaft section 35 as the center of rotation, similar to the suction catching section 33 of the first catching section 30, and can generate a suction flow by suction force. With this configuration, the second catching section 34 can catch the yarn end of the yarn 14 on the yarn supplying section 15 side by the suction flow, and guide the caught yarn 14 on the yarn supplying section 15 side to the yarn joining device 38. In the following description, the yarn 14 on the yarn supplying section 15 side may be referred to as the lower yarn, and the yarn end of the lower yarn may be referred to as the lower yarn end.

[0055] In addition, like the first capture unit 30, the second capture unit 34 may have a shutter, for example, at the connection portion between the pipe unit 36 ​​and the duct 191, in order to control whether or not the above-mentioned suction flow is generated.

[0056] (3) Package formation process flow Next, the operation of the yarn winding device 10 in the winding process will be described with reference to Figs. 2 to 4. Fig. 3 is a flowchart showing the flow of processes performed in the yarn winding device 10 to form the package 22. Fig. 4 is a flowchart showing the flow of processes of the first control and the second control. Note that the flowcharts shown in Figs. 3 and 4 are merely examples and may be modified as appropriate within a range that does not contradict. For example, other steps not shown may be included before or after each step, and the order of each step may be modified as appropriate within a range that does not contradict each other. Note that in the following description, the rotation of the package 22 in the winding direction of the yarn 14 is called forward rotation, and the rotation in the unwinding direction is called reverse rotation.

[0057] When a winding process is performed to wind the yarn 14 around the package 22, the unit control unit 50 determines whether or not the yarn 14 has been broken along the yarn travel path from the yarn supply unit 15 to the winding unit 17 (step S1). In this embodiment, the unit control unit 50 determines whether or not the yarn 14 has been broken based on whether or not a yarn presence signal indicating the presence of the yarn 14 has been input from the clearer 40. Examples of causes of the yarn 14 being broken include when the clearer 40 detects a yarn defect and cuts the yarn 14 with the cutter 41, or when the yarn 14 is broken due to accidental large tension. Alternatively, it may be determined whether or not the yarn 14 has been broken based on a cut signal generated when the yarn 14 is cut by the cutter 41. When the yarn 14 is broken in the yarn winding device 10, the upper yarn end of the broken yarn 14 is wound around the package 22 that rotates inertia.

[0058] If it is determined that the yarn 14 is not broken (No in step S1), the unit control unit 50 rotates the package 22 in the forward direction at a predetermined winding speed (the rotation speed of the package 22 when the yarn 14 is wound) (step S5). As a result, the yarn 14 is wound so as to form the package 22.

[0059] On the other hand, when it is determined that the yarn 14 is broken (Yes in step S1), the unit control section 50 executes control for capturing the upper yarn end by the first capturing section 30 (step S2).

[0060] The capture control operation (step S2) will now be described in detail. The unit control section 50 controls the first motor 21 to stop the rotation of the package 22. The unit control section 50 also sends a drive signal to the second motor 39 to execute control to rotate the pipe section 32 of the first catching section 30 upward. As a result, the suction catching section 33 reaches the upper yarn catching position shown by the dotted line in FIG. 2.

[0061] When the suction and capture part 33 reaches the upper yarn capture position, the unit control part 50 sends a signal to the first motor 21 to reversely rotate the package 22. The unit control part 50 controls the rotation speed so that the package 22 rotates in reverse at a first speed. The first speed is preferably 100 rpm or more and 150 rpm or less. With the pipe part 32 moved to the upper upper yarn capture position, the unit control part 50 reversely rotates the package 22 by a predetermined amount of rotation.

[0062] The unit control unit 50 also opens the shutter member disposed on the path connecting the pipe unit 32 and the duct 191. This allows the suction catcher unit 33 to apply the suction airflow to the surface of the package 22 at a position substantially facing the surface of the package 22 with a predetermined distance therebetween. The package 22 rotates in the reverse direction while the suction catcher unit 33 applies the suction airflow to 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 catcher unit 33. When the upper yarn end present on the surface of the package 22 passes through the portion facing the suction catcher unit 33, it is sucked into the pipe unit 32 by the action of the suction airflow. The unit control unit 50 repeats the capture control until a predetermined number of times is reached. The predetermined number of times may be one or more times.

[0063] 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 S3). When a signal indicating that the yarn 14 is present inside the pipe section 32 is input from the yarn detection sensor 43, the unit control section 50 ends the process of step S1 even if it is halfway through.

[0064] When it is determined that the first catching part 30 has succeeded in catching the upper yarn end (Yes in step S3), the unit control part 50 causes the yarn joining device 38 to perform yarn joining (step S4).

[0065] Specifically, while continuing the reverse rotation of the package 22 at the first speed, the unit control section 50 sends a drive signal to the second motor 39 to rotate the pipe section 32 downward and move it to the standby position shown by the solid line in Fig. 2. As a result, the upper yarn captured by the first capturing section 30 is guided to the yarn joining device 38.

[0066] Meanwhile, the lower yarn end of the severed yarn 14 is captured by the suction airflow generated in the suction capturing portion 37 of the second capturing portion 34. After the lower yarn end has been captured, the unit control portion 50 rotates the pipe portion 36 upward and moves it to the position shown by the dotted line in Fig. 2. As a result, the lower yarn captured by the second capturing portion 34 is guided to the yarn joining device 38.

[0067] The unit control section 50 controls the yarn joining device 38 to join the upper yarn and the lower yarn (step S4). The unit control section 50 closes the shutter member disposed in the path connecting the pipe section 32 and the duct 191, and stops the suction flow in the suction capture section 33.

[0068] After the yarn splicing device 38 has performed the yarn splicing, the unit control section 50 sends a drive signal to the first motor 21 to rotate the package 22 in the forward direction, thereby winding the yarn 14 onto the package 22 (step S5).

[0069] When it is determined that the first catching part 30 has failed to catch the upper thread end (No in step S3), the unit control part 50 starts the first control and the second control. In this embodiment, the first control is composed of steps S71 to S77 in Fig. 4, and the second control is composed of steps S78 to S79 ​​in Fig. 4.

[0070] 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 rotating the package 22 in the reverse direction. Specifically, for example, as the first rotation control, the package 22 is rotated forward, and then a signal is sent to the first motor 21 to switch the rotation direction of the package 22 and rotate the package 22 in the reverse direction (step S71). At this time, the unit control unit 50 controls the rotation speed so that the package 22 rotates forward at the third speed. The third speed is faster than the first speed. The third speed is, for example, 4500 rpm or more and 7000 rpm or less. After rotating the package 22 forward at the third speed for a predetermined time, the unit control unit 50 rotates the package 22 in the reverse direction at the first speed and attempts to capture the upper yarn end by the first capture unit 30. The unit control unit 50 repeats the attempt to capture the upper yarn end by rotating the package 22 forward and reverse at high speed until a predetermined number of times. The predetermined 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 passes under the yarn 14 wound around the package 22, causing a passing yarn.

[0071] 5 is a schematic diagram of the package 22 in a state where a passing yarn occurs. Due to the high speed forward rotation of the package 22, the yarn 14 (solid line in FIG. 5) wound around the package 22 becomes loose, and the yarn 14 near the upper yarn end (dotted line in FIG. 5) passes under the yarn 14 wound around the package 22.

[0072] The unit control section 50 monitors, at an appropriate timing, the signal input from the thread detection sensor 43 every time an attempt to capture the upper thread end is made. When a signal indicating the presence of the thread 14 inside the pipe section 32 is input from the thread detection sensor 43, the unit control section 50 ends the process of step S71 even if it is halfway through.

[0073] Thereafter, the unit control section 50 determines whether or not the first catching section 30 has succeeded in catching the upper thread end, based on the thread detection signal outputted by the thread detection sensor 43 (step S72).

[0074] When it is determined that the first catching part 30 has failed to catch the upper thread end even after a predetermined number of attempts to catch the upper thread end involving high-speed forward and reverse rotation of the package 22 (No in step S72), the unit control part 50 sends a signal to the first motor 21 to end the high-speed forward and reverse rotation of the package 22. Thereafter, the unit control part 50 performs the first rotation control again. The first rotation control is a control that includes rotating the package 22 in the reverse direction. Specifically, for example, as the first rotation control, the package 22 is made to perform an alternating rotational motion in which forward and reverse rotations are alternately performed (step S73).

[0075] At this time, the unit control unit 50 first sends a signal to the first motor 21 to rotate the package 22 forward. After rotating the package 22 by a predetermined rotation amount, the unit control unit 50 sends a signal to the first motor 21 to switch the rotation direction of the package 22 and rotate the package 22 in the reverse direction by a predetermined rotation amount. The unit control unit 50 causes the package 22 to perform an alternating rotation motion and attempts to capture the upper yarn end by the first catching unit 30. The unit control unit 50 controls the rotation time, rotation speed, etc. of the package 22 so that the amount of rotation of the reverse rotation is greater than the amount of rotation of the forward rotation in one alternating rotation motion. Specifically, the unit control unit 50 controls the rotation time, rotation speed, etc. of the package 22 so that the amount of rotation of the reverse rotation minus the amount of rotation of the forward rotation is at least one rotation of the package 22. This allows the first catching unit 30 to apply suction over the entire circumference of the package 22. The unit control section 50 causes the package 22 to perform an alternating rotational motion while moving the pipe section 32 to the upper upper yarn capturing position. The package 22 performs an alternating rotational motion while the suction capturing section 33 applies a suction flow to 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 capturing section 33.

[0076] If the upper yarn end is not caught by the first catching part 30 even after the package 22 has been rotated a predetermined number of times, the unit control part 50 stops the rotation of the package 22, and then rotates the package 22 again to attempt to catch the upper yarn end by the first catching part 30. The unit control part 50 repeats the attempt to catch the upper yarn end involving the alternating rotation of the package 22 until the predetermined number of attempts is reached. The predetermined number of attempts may be one or more. At this time, the upper yarn end on the package 22 side may pass under the yarn 14 wound around the package 22, which may cause a passing yarn.

[0077] The unit control section 50 monitors, at an appropriate timing, the signal input from the thread detection sensor 43 every time an attempt to capture the upper thread end is made. When a signal indicating the presence of the thread 14 inside the pipe section 32 is input from the thread detection sensor 43, the unit control section 50 ends the process of step S73 even if it is halfway through.

[0078] Thereafter, the unit control section 50 determines whether or not the first catching section 30 has succeeded in catching the upper thread end, based on the thread detection signal outputted by the thread detection sensor 43 (step S74).

[0079] If it is determined that the first capturing part 30 has failed to capture the upper thread end after a predetermined number of attempts to capture the upper thread end involving alternating rotational motion (No in step S74), the unit control part 50 sends a signal to the first motor 21 to end the alternating rotational motion of the package 22.

[0080] The unit control section 50 determines that there is a possibility that the yarn 14 has failed to be caught, and displays the occurrence of an abnormality (second abnormality) on the display 12a to notify the operator (step S75). The second abnormality is, for example, an abnormality indicating that the yarn 14 cannot be peeled off from the surface of the package 22. In other words, since it can be distinguished from the first abnormality described below, the operator can perform work based on the abnormality. For example, the identification name of the yarn winding device 10 in which the abnormality has occurred and the details of the abnormality (possibility of failing to catch the yarn) are displayed on the display 12a. Also, an alarm may be sounded to notify the operator that an abnormality has occurred.

[0081] When it is determined that the first catching part 30 has succeeded in catching the upper yarn end (Yes in step S72 or step S74), the unit control part 50 rotates the pipe part 32 to a predetermined position (dotted chain line in FIG. 2) while continuing the reverse rotation of the package 22 (step S76). In other words, the unit control part 50 moves (moves) the suction catching part 33 to a position a predetermined distance away from the package 22. At this time, the yarn detection sensor 43 and the clearer 40 cannot detect the yarn 14 caught by the first catching part 30.

[0082] Thereafter, the unit control unit 50 executes a second rotation control (step S77) in which the first motor 21 is sent a signal to rotate the package 22 in the reverse direction at a second speed faster than the first speed while continuing the reverse rotation of the package 22. If the second speed is low, the yarn 14 may be wound around the package 22 even if a passing yarn occurs. On the other hand, if the second speed is too high, the yarn 14 may be caught by fluff or the like and wound around the package 22 even if a passing yarn does not occur. In addition, the yarn 14 captured and sucked by the suction capture unit 33 becomes long, which reduces production efficiency. Therefore, the second speed is preferably 700 rpm or more and 900 rpm or less, and more preferably 800 rpm. After a predetermined time has elapsed, the unit control unit 50 rotates the pipe unit 32 downward while continuing the reverse rotation of the package 22 at the first speed, and guides the upper yarn to the yarn joining device 38.

[0083] Here, if no passing yarn occurs, the yarn 14 of the package 22 is unwound by rotating the package 22 in the reverse direction, and the upper yarn is guided to the yarn joining device 38 while being captured by the suction capture unit 33. However, if a passing yarn occurs, the passing yarn is caught on the surface of the package 22 and the yarn 14 is not unwound. As the package 22 rotates in the reverse direction, the yarn 14 is wound around the package 22 in the reverse direction, starting from the position where the passing yarn occurs. As a result, the upper yarn captured by the suction capture unit 33 is pulled toward the package 22, and the upper yarn comes out from inside the suction capture unit 33. As a result, the upper yarn is not guided to the yarn joining device 38.

[0084] After the first control, in the second control, the unit control unit 50 determines whether the yarn 14 is present based on the yarn-present signal output by the clearer 40 (step S78). Specifically, if the upper yarn and the lower yarn are guided to the yarn joining device 38, the yarn 14 is present in the yarn traveling path between the yarn supplying unit 15 and the winding unit 17, so the clearer 40 outputs the yarn-present signal to the unit control unit 50. On the other hand, if the upper yarn and the lower yarn are not guided to the yarn joining device 38, the clearer 40 does not output the yarn-present signal.

[0085] If 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 yarn joining (step S4).

[0086] If it is determined that the yarn 14 is not present (No in step S78), the unit control section 50 determines that there is a possibility that a passing yarn has occurred, and displays the occurrence of an abnormality (first abnormality) on the display 12a to notify the operator (step S79). For example, the display 12a displays the identification name of the yarn winding device 10 in which the abnormality has occurred and the details of the abnormality (possibility that a passing yarn has occurred). Also, an alarm may be sounded to notify the operator that an abnormality has occurred.

[0087] The unit control unit 50 ends the process (Yes in step S6) when, for example, another abnormality occurs in the yarn winding device 10 that requires the winding of the yarn 14 to be stopped, or when the operator instructs the yarn winding device 10 to stop. If such a situation does not occur (No in step S6), the unit control unit 50 repeatedly executes steps S1 to S5 described above until winding of the yarn 14 is completed.

[0088] (4) Flow of the first rotation control and the second rotation control Next, the operation of the yarn winding device 10 in the first rotation control and the second rotation control will be described with reference to the timing chart shown in Fig. 6. Fig. 6 is an example of a timing chart showing the operation of each part of the yarn winding device 10 after the yarn 14 that was severed during the formation of the package 22 has failed to be captured and the first rotation control has been started.

[0089] At time t1, the unit control section 50 rotates the pipe section 32 of the first catching section 30 upward. After that, when the pipe section 32 reaches the upper yarn catching position, the unit control section 50 rotates the package 22 in the reverse direction at time t2. This causes the first catching section 30 to attempt to catch the upper yarn end. In the example shown in FIG. 6, the package 22 is in a stopped state before time t2, but the package 22 is not necessarily in a stopped state. Specifically, for example, when the package 22 is caused to perform high-speed forward rotation and reverse rotation as the first rotation control, the package 22 may be rotating forward before time t2. Also, for example, when the package 22 is caused to perform an alternating rotational motion as the first rotation control, the package 22 may be rotating forward or reverse before time t2.

[0090] At time t3 after a predetermined time, when the yarn detection sensor 43 detects the yarn 14 (changing from an OFF signal to an ON signal), the unit control unit 50 rotates the pipe unit 32 to a predetermined position (dotted line in FIG. 2) at time t4 so that the suction and capturing unit 33 is separated from the package 22 by a predetermined distance. Thereafter, at time t5, the unit control unit 50 rotates the package 22 in the reverse direction at a second speed that is faster than the first speed. As a result, the package 22 rotates in the reverse direction at high speed with the first capturing unit 30 capturing the upper yarn end at a position separated from the package 22.

[0091] At time t6 after a predetermined time, the unit control section 50 changes the rotation speed to the first speed while continuing the reverse rotation of the package 22, and also rotates the pipe section 32 downward to guide the upper yarn to the yarn joining device 38.

[0092] When the upper yarn and the lower yarn are guided to the yarn joining device 38, since the yarn 14 is present in the yarn traveling path between the yarn supplying section 15 and the winding section 17, at time t7, the clearer 40 outputs a yarn present signal (ON signal) to the unit control section 50.

[0093] 2. Features of the embodiment The yarn winding device 10 of this embodiment includes a yarn supplying 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 clearer 40, and a unit control section 50. The yarn supplying section 15 supplies the yarn 14. The winding section 17 winds the yarn 14 supplied from the yarn supplying section 15 to form a package 22. The yarn joining device 38 joins the yarn 14 on the package 22 side to the yarn supplying 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 supplying section side and guides the yarn to the yarn joining device 38. The yarn detection sensor 43 and the clearer 40 detect the yarn 14 caught by the first catching section 30. The unit control section 50 performs first and second controls. In the first control, while performing the first rotation control including rotating the package 22 in the unwinding direction of the yarn 14, the yarn 14 is captured by the first capturing unit 30, and then, if the yarn 14 is detected by the yarn detection sensor 43, a second rotation control is performed to further rotate the package 22 in the unwinding direction of the yarn 14. In the second control, if the yarn 14 is not detected by the clearer 40 after the first control, a first abnormality is reported.

[0094] The yarn winding device 10 notifies of an abnormality when there is a possibility that a sneaking yarn has occurred, thereby reducing the occurrence of the yarn 14 being wound onto the package 22 in a state in which a sneaking yarn has occurred, thereby improving the quality of the package 22.

[0095] In the yarn winding device 10 of this embodiment, the unit control section 50 further performs capture control. In the capture control, while the package 22 is rotating at a first speed in the unwinding direction of the yarn 14, the first capture section 30 captures the yarn 14, and then the yarn detection sensor 43 detects the yarn 14. The first control is a control that is performed when the yarn 14 is not detected as a result of the capture 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.

[0096] This yarn winding device 10 performs the first control when the first capture unit 30 fails to capture the yarn 14 in the capture control. In the second rotation control, the package 22 is rotated in the reverse direction at a speed faster than the rotation speed in the capture control. This improves the accuracy of detecting the occurrence of a passing yarn.

[0097] In the yarn winding device 10 of the present embodiment, when the yarn 14 is detected as a result of the capture control, the unit control section 50 rotates the package 22 in the unwinding direction of the yarn 14 at a first speed.

[0098] In the yarn winding device 10, when the first catching part 30 succeeds in catching the yarn 14 in the catching control, the package 22 is rotated at the first speed in the unwinding direction of the yarn 14. This makes it possible to reduce the amount of yarn 14 sucked by the first catching part 30.

[0099] In the yarn winding device 10 of the present embodiment, before the first control, the unit control section 50 rotates the package 22 in the winding direction of the yarn 14 at a third speed that is faster than the first speed.

[0100] In this yarn winding device 10, the yarn 14 on the package 22 side can be efficiently captured before the first control.

[0101] In the yarn winding device 10 of this embodiment, before the first control, the unit control unit 50 causes the package 22 to perform an alternating rotational motion in which the package 22 alternates between forward rotation in the winding direction of the yarn 14 and reverse rotation in the unwinding direction.

[0102] In this yarn winding device 10, the yarn 14 on the package 22 side can be efficiently captured before the first control.

[0103] In the yarn winding device 10 of the present embodiment, the unit control section 50 moves the first catching section 30 away from the package 22 before executing the second rotation control.

[0104] In this yarn winding device 10, the suction by the first catching part 30 does not act on the yarn 14 wound on the package 22, so when the package 22 is rotated in the reverse direction, the passing yarn is easily wound onto the package 22. This improves the accuracy of detecting the occurrence of a passing yarn.

[0105] In the yarn winding device 10 of the present embodiment, the unit control section 50 notifies of a second abnormality when the yarn 14 is not detected by the yarn detection sensor 43 or the clearer 40 in the first control.

[0106] In this yarn winding device 10, it is possible to distinguish between a case where the yarn 14 cannot be captured in the first control (when capture fails) and a case where the yarn 14 cannot be captured in the second control (when there is a possibility that a sneaky yarn has occurred), and to notify of an abnormality.

[0107] 3. Variations In the following description, only the configuration different from this embodiment will be described.

[0108] (1) Variation A The second speed may be greater than or equal to three times and less than or equal to six times the first speed.

[0109] (2) Variation B The unit control section 50 may change the second speed based on the diameter of the package 22. In this yarn winding device 10, the package 22 can be rotated so that the yarn 14 is unwound at an appropriate speed, regardless of the diameter of the package 22.

[0110] (3) Variation C In this embodiment, the yarn detection sensor 43 is disposed near the winding unit 17, and detects whether or not the first catching unit 30 has caught the upper yarn based on the presence or absence of the yarn 14 inside the pipe unit 32. However, the yarn detection sensor 43 does not necessarily have to be provided. In that case, the suction catching unit 33 may be moved once to the lower standby position, and then, based on the yarn presence signal output by the clearer 40, it may be detected whether or not the first catching unit 30 has caught the upper yarn.

[0111] (4) Variation D In this embodiment, if it is determined in the second control that the yarn 14 is present based on the yarn presence signal output by the clearer 40 (Yes in step S12), the unit control unit 50 causes the yarn joining device 38 to perform yarn joining (step S4). However, the unit control unit 50 may determine the presence or absence of the yarn 14 based on the yarn presence signal output by the clearer 40 after causing the yarn joining device 38 to perform yarn joining.

[0112] (5) Variation E In this embodiment, when the clearer 40 detects that the amount of light detected by the optical sensor is normal within a predetermined range, it outputs a thread-present signal to the unit control unit 50. The unit control unit 50 determines whether the thread 14 has been broken based on whether a thread-present signal indicating that the thread 14 is present is input from the clearer 40. However, the clearer 40 may output a thread-absent signal to the unit control unit 50 when it detects that the thread 14 is absent. The unit control unit 50 may determine whether the thread 14 has been broken based on whether a thread-absent signal indicating that the thread 14 is absent is input from the clearer 40.

[0113] (6) Variation F In this embodiment, the yarn detection sensor 43 is disposed near the winding unit 17, and detects the presence or absence of the yarn 14 inside the pipe unit 32. However, the yarn detection sensor 43 may also be disposed inside the first catching unit 30.

[0114] In this yarn winding device 10, the presence or absence of the yarn 14 inside the pipe part 32 can be constantly monitored regardless of the position of the first catching part 30. Therefore, in the second control, the presence or absence of the yarn 14 can be determined based on the yarn detection signal output by the yarn detection sensor 43.

[0115] (7) Modification G The yarn detection sensor 43 has a light-projecting section and a light-receiving section arranged to sandwich a transparent member, and may detect the presence of yarn 14 (yarn end) inside the pipe section 32 when the light-receiving section does not receive the light irradiated by the light-projecting section into the inside of the pipe section 32.

[0116] (8) Variation H In this embodiment, in the first control, the unit control section 50 executes a second rotation control for rotating the package 22 in the reverse direction at a second speed faster than the first speed while continuing the reverse rotation of the package 22, which is the first rotation control (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 rotating the package 22 in the reverse direction again at the second speed.

[0117] 7 is an example of a timing chart showing the operation of each part of the yarn winding device 10 after the execution of the first rotation control in this modified example is started. The operations from time t1 to time t3 are the same as those in this embodiment, and therefore a description thereof will be omitted.

[0118] At time t4, the unit control section 50 rotates the pipe section 32 to a predetermined position (dotted line in FIG. 2) so that the suction and catching section 33 is spaced a predetermined distance from the package 22. The unit control section 50 also stops the package 22. After that, at time t5, the unit control section 50 rotates the package 22 in the reverse direction at a second speed that is faster than the first speed. As a result, the package 22 rotates in the reverse direction at high speed with the first catching section 30 catching the upper yarn end at a position spaced from the package 22. Times t6 to t7 are the same as in this embodiment, and therefore will not be described.

[0119] (9) Variation I In this embodiment, in the second control, the unit control unit 50 determines the presence or absence of the yarn 14 based on the thread presence signal output by the clearer 40 (step S78). However, the unit control unit 50 may determine the presence or absence of the yarn 14 based on the thread detection signal output by the thread detection sensor 43. In this case, after executing the second rotation control, the unit control unit 50 may cause the pipe unit 32 to rotate to the upper thread capturing position (dotted line in FIG. 2) to detect the yarn 14 by the thread detection sensor 43.

[0120] (10) Variation J In this embodiment, in the second control, the unit control unit 50 determines the presence or absence of the yarn 14 based on the yarn presence signal output by the clearer 40 (step S78). However, the unit control unit 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 unit 50 does not need to move (move) the suction and capture unit 33 to a position spaced a predetermined distance away from the package 22.

[0121] In the yarn winding device 10, the unit control section 50 does not need to move the position of the suction and capture section 33 in the first control and the second control, which simplifies the control.

[0122] (11) Variation K In this embodiment, high-speed forward and reverse rotation (step S71) and alternating rotation (step S73) are performed as the first rotation control. However, only high-speed forward and reverse rotation may be performed as the first rotation control. FIG. 8 is a flowchart showing the flow of the processing of the first control and the second control in this modified example. Note that the flowchart shown in FIG. 8 is merely an example, and may be appropriately changed within a range that does not contradict. For example, other steps not shown may be included before or after each step, and the order of each step may be appropriately changed within a range that does not contradict each other. In this modified example, the first control is composed of steps S271 to S275 in FIG. 8, and the second control is composed of steps S276 to S277 in FIG. 8.

[0123] Step S271 is similar to step S71 in FIG. 4, and therefore the description will be omitted.

[0124] If it is determined that the first capturing part 30 has failed to capture the upper thread end even after a predetermined number of attempts to capture the upper thread end involving high-speed forward and reverse rotation of the package 22 (No in step S272), the unit control part 50 sends a signal to the first motor 21 to end the high-speed forward and reverse rotation of the package 22.

[0125] The unit control section 50 determines that there is a possibility that the yarn 14 has failed to be caught, and displays the occurrence of an abnormality (second abnormality) on the display 12a to notify the operator (step S273). For example, the display 12a displays the identification name of the yarn winding device 10 in which the abnormality has occurred and the details of the abnormality (possibility of failing to catch the yarn). Also, an alarm may be sounded to notify the operator that an abnormality has occurred.

[0126] If it is determined that the first capturing portion 30 has successfully captured the upper thread end (Yes in step S272), the unit control portion 50 rotates the pipe portion 32 to a predetermined position (dotted line in Figure 2) while continuing the reverse rotation of the package 22 (step S274).

[0127] Steps S275 to S277 are similar to steps S77 to S79 ​​in FIG. 4, and therefore the description thereof will be omitted.

[0128] (12) Variation L As the first rotation control, only the alternating rotation motion may be performed. FIG. 9 is a flowchart showing the flow of the first control and the second control in this modified example. Note that the flowchart shown in FIG. 9 is merely an example, and may be appropriately changed within a range that is consistent. For example, other steps not shown may be included before or after each step, and the order of each step may be appropriately changed within a range that is consistent. In this modified example, the first control is composed of steps S371 to S375 in FIG. 9, and the second control is composed of steps S376 to S377 in FIG. 9.

[0129] The unit control unit 50 performs a first rotation control after temporarily stopping the reverse rotation of the package 22. The first rotation control includes reverse rotation of the package 22. As the first rotation control, the unit control unit 50 causes the package 22 to perform an alternating rotational motion in which forward rotation and reverse rotation are alternately performed (step S371). Details of the alternating rotational motion are similar to those of step S73 in this embodiment, and therefore will not be described.

[0130] Steps S372 to S377 are similar to steps S74 to S79 ​​in FIG. 4, and therefore the description thereof will be omitted.

[0131] (13) Variation M In this embodiment, as the first rotation control, high-speed forward and reverse rotation (step S71) including reverse rotation of the package 22 and alternating rotation (step S73) are performed. However, as the first rotation control, only reverse rotation of the package 22 may be performed. FIG. 10 is a flowchart showing the flow of processing of the first control and the second control in this modified example. Note that the flowchart shown in FIG. 10 is merely an example, and may be appropriately changed within a range that does not contradict. For example, other steps not shown may be included before or after each step, and the order of each step may be appropriately changed within a range that does not contradict each other. In this modified example, the first control is composed of steps S471 to S475 in FIG. 10, and the second control is composed of steps S476 to S477 in FIG. 10.

[0132] The unit control section 50 temporarily stops the reverse rotation of the package 22, and then performs the first rotation control. The first rotation control is a control that includes rotating the package 22 in the reverse direction. As the first rotation control, the unit control section 50 causes the package 22 to rotate in the reverse direction (step S471). The unit control section 50 rotates the package 22 in the reverse direction and also attempts to cause the first catching section 30 to catch the upper yarn end.

[0133] Steps S472 to S477 are similar to steps S74 to S79 ​​in FIG. 4, and therefore the description thereof will be omitted.

[0134] (14) Variation N In this embodiment, the unit control unit 50 executes the second rotation control, which rotates the pipe unit 32 to a predetermined position (dotted line in FIG. 2) and then sends a signal to the first motor 21 to rotate the package 22 in the reverse direction at a second speed faster than the first speed (step S77, time t5). However, at time t5, the unit control unit 50 may continue the reverse rotation of the package 22 at the first speed.

[0135] 4. 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 without departing from the spirit of the invention. In particular, the multiple embodiments and modifications described in this specification can be arbitrarily combined as necessary. [Industrial Applicability]

[0136] The yarn winding device of the present disclosure can be applied to an automatic winder, an air spinning frame, and an open-end spinning frame that use multiple yarn winding devices in an array, and can also be applied to textile machines that manufacture a wide variety of fibers. [Explanation of symbols]

[0137] 1 Automatic Winder 10 Thread winding device 12 Machine control device 12a Display 12b Input Interface 13 Doffing device 14 Thread 15 Yarn feeder 16 Yarn supply bobbin 17 Winding section 18 Cradle 19 Suction device 20 Winding drum 21 First motor 22 Packages 25 Yarn unwinding auxiliary device 26 Movable cylinder 27 Tensioning device 30 Upper thread catcher 31 Shaft 32 Pipe section 33 Suction capture part 34 Lower thread catcher 35 Shaft 36 Pipe section 37 Suction capture part 38 Yarn splicing device 39 Second Motor 40 Clearer (detection unit, second detection unit) 41 Cutter 43 Yarn detection sensor (detection unit, first detection unit) 50 Unit control section (control section) 191 Duct 193 Suction source

Claims

1. A yarn supplying unit for supplying yarn; a winding unit that winds the yarn supplied from the yarn supplying unit to form a package; a yarn splicing device that splices the yarn on the package side and the yarn on the yarn supplying unit side; a first catching unit that catches a yarn end on the package side and guides the yarn to the yarn joining device; a second catching section that catches the yarn end on the yarn supplying section side and guides the yarn to the yarn joining device; a detection unit that detects the yarn captured by the first capturing unit; A control unit; Equipped with The control unit performs a first control and a second control, The first control is a first rotation control including rotating the package in the yarn unwinding direction, in which the first catching unit catches the yarn, and then, when the yarn is detected by the detection unit, a second rotation control is executed to further rotate the package in the yarn unwinding direction; The second control notifies a first abnormality when the yarn is not detected by the detection unit after the first control. Thread winding device.

2. The control unit further performs capture control to cause the first capture unit to capture the yarn and the detection unit to detect the yarn while rotating the package at a first speed in the yarn unwinding direction, The first control is a control that is performed when the yarn is not detected as a result of the capture control, and a rotation speed of the package in the second rotation control is a second speed that is faster than the first speed. The yarn winding device according to claim 1.

3. when the yarn is detected as a result of the capture control, the control unit rotates the package in a direction in which the yarn is unwound at the first speed. The yarn winding device according to claim 2.

4. The second speed is greater than or equal to 3 times and less than or equal to 6 times the first speed. The yarn winding device according to claim 2 or 3.

5. The control unit changes the second speed based on a diameter of the package. The yarn winding device according to any one of claims 2 to 4.

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

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

8. The control unit moves the first capture unit away from the package before executing the second rotation control. The yarn winding device according to any one of claims 1 to 7.

9. The detection unit is A first detection unit that detects the yarn inside the first capture unit; a second detection unit that detects the yarn in a yarn traveling path of the yarn between the yarn supplying unit and the winding unit; having The control unit causes the first detection unit to detect the yarn in the first control and causes the second detection unit to detect the yarn in the second control. The yarn winding device according to any one of claims 1 to 8.

10. The control unit notifies a second abnormality when the yarn is not detected by the detection unit in the first control. The yarn winding device according to any one of claims 1 to 9.

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