JP2023105427A - Yarn winding machine - Google Patents

Abstract

To provide a yarn winding machine capable of detecting a storage amount of yarn wound around a yarn storage device with a simple structure and at a low cost.SOLUTION: A yarn winding machine includes: a supply part that can supply a yarn Y; a winding part forming a package; a yarn storage device 40 that is provided in the middle of a yarn travel route formed between the supply part and the winding part, that winds the yarn Y delivered from the supply part around a storage area A of an outer peripheral surface 41d of a storage roller 41 by rotating the storage roller 41, and that temporarily stores the yarn Y; a control part that controls the rotation of the storage roller 41; and a detection part 53 that detects the yarn Y wound around the outer peripheral surface 41 d of the storage roller 41. The detection part 53 is a line sensor 53A that detects the presence or absence of the yarn Y in a straight section S1 connecting between an end 41f of an upstream side in a travel direction of the yarn Y in the storage area A and an end 41e of a downstream side located downstream in the travel direction of the yarn Y from the end 41f of the upstream side.SELECTED DRAWING: Figure 4

Description

One aspect of the present invention relates to a yarn winder.

A yarn supplying section that supports the yarn supplying bobbin, a yarn storage device that unwinds the yarn from the yarn supplying bobbin supported by the yarn supplying section, and winds the unwound yarn, and a yarn end of the yarn on the yarn supplying bobbin side. and a yarn end of the yarn on the yarn accumulating device side, and a yarn winding section for winding the yarn to form a package. . In such a yarn winding machine, an upper limit sensor for detecting when the amount of yarn on the storage roller has exceeded a predetermined upper limit and a sensor for detecting when the amount of yarn on the storage roller is less than a predetermined lower limit are provided in the vicinity of the outer peripheral surface of the cylindrical portion of the storage roller. Patent Document 1 discloses a yarn winding machine in which a lower limit sensor for detection is arranged. Then, based on the detection results of these sensors, the unit control section of the yarn winding machine of Patent Document 1 adjusts the yarn storage amount (wound amount) of the storage roller to fall between the upper limit amount and the lower limit amount. Secondly, it controls the drive motor.

JP 2013-241231 A

In a yarn winding machine provided with such a yarn accumulating device, not only the upper limit value or the lower limit value of the yarn accumulated amount as described above, but also the accumulated amount of the yarn wound around the yarn accumulating device can be detected in detail. There is a demand to realize fine control and to detect a winding abnormality in the yarn accumulating device. In this case, for example, if the number of sensors described above is increased, it becomes possible to detect the storage amount in detail, but there is a problem that the configuration becomes complicated and the cost increases.

SUMMARY OF THE INVENTION Accordingly, an object of one aspect of the present invention is to provide a yarn winding machine capable of detecting the amount of yarn wound around a yarn accumulating device with a simple configuration and at low cost.

A yarn winding machine according to one aspect of the present invention includes a supply section capable of supplying yarn, a winding section that winds the yarn supplied from the supply section to form a package, and between the supply section and the winding section Yarn storage that temporarily stores the yarn by winding the yarn delivered from the supply unit by rotating the storage roller around the storage area on the outer peripheral surface of the storage roller a controller for controlling the rotation of the storage roller; and a detection unit for detecting the yarn wound around the outer peripheral surface of the storage roller. A line sensor that detects the presence or absence of a yarn in a straight section connecting between an upstream end side and a downstream end side that is positioned downstream in the yarn running direction from the upstream end side.

In the yarn winding machine having this configuration, the detection unit for detecting the yarn wound around the outer peripheral surface of the accumulating roller is located between the upstream end in the yarn traveling direction and the downstream end in the yarn traveling direction in the accumulating area. It is composed of a line sensor that detects the presence or absence of a thread in a straight section connecting the This makes it possible to detect the presence or absence of the yarn in the straight section in the storage area without providing sensors for detecting the presence or absence of the yarn at various locations in the storage area. As a result, the storage amount of the yarn wound around the yarn storage device can be detected with a simple structure and at low cost.

In the yarn winding machine according to one aspect of the present invention, the line sensor may be arranged such that the extending direction of the straight section is parallel to the extending direction of the rotating shaft of the storage roller. In this configuration, the line sensor detects the light reflected by the storage roller or the yarn in the area parallel to the extending direction of the rotation axis of the storage roller. Therefore, the manner of reflection of the storage roller or the yarn in the straight section can be made uniform.

The yarn winding machine according to one aspect of the present invention further includes a light emitting unit that emits light toward the storage roller, the line sensor receives light reflected by the storage roller or the yarn, and the control unit includes the line sensor receives light, it may be determined that the light is received from either the accumulating roller or the light reflected by the yarn, and the presence or absence of the yarn in the straight section may be determined based on the determination result. With this configuration, the processing can be simplified by determining the presence or absence of the yarn based on the detection result of the light reflected by the storage roller or the yarn.

In the yarn winding machine according to one aspect of the present invention, the light emitting section has two light sources and an optical waveguide that converts the light emitted from the two light sources into surface light emission and emits the light toward the storage roller. , the line sensor may receive light through a lens that demagnifies the incident light. With this configuration, the light emitted from the light emitting section can be made uniform, so the accuracy in detecting the yarn can be improved, and the detection section can be provided compactly.

In the yarn winding machine according to one aspect of the present invention, the line sensor prevents the light emitted from the light-emitting portion that reflects the outer peripheral surface of the storage roller from entering and prevents the light from the light-emitting portion that reflects the yarn stored on the storage roller. may be provided at a position where the light of With this configuration, it is possible to improve the detection accuracy of a white yarn that is likely to reflect light from the yarn wound around the storage roller. Specifically, the presence or absence of the yarn is detected based on the reflected light only from the yarn stored in the storage roller, and light reflected from portions other than the yarn is reduced from entering the line sensor. , the yarn detection accuracy can be improved.

The yarn winding machine according to one aspect of the present invention further includes a cover that faces a part of the outer peripheral surface of the storage roller, and the cover is configured to cover at least one of the traveling directions of the light from the light emitting section that reflects the outer peripheral surface of the storage roller. may be provided in the department. With this configuration, fly waste generated in the storage roller scatters and is suppressed from accumulating on the peripheral structure. Furthermore, by controlling the airflow generated by the rotation of the storage roller, it is possible to prevent the yarn end from coming into contact with the surrounding structure.

In the yarn winding machine according to one aspect of the present invention, one of the straight lines orthogonal to the rotation axis is virtually set as the first straight line in a plan view seen from the direction in which the rotation axis of the storage roller extends, and the first straight line When one of the straight lines that are parallel to and in contact with the outer peripheral surface of the storage roller is virtually set as the second straight line, the line sensor is arranged between the first straight line and the second straight line, and the light emitting unit is the second straight line. It is arranged between the line sensor and the first straight line on the straight line or in the arrangement direction of the first straight line and the second straight line, and the cover is arranged with respect to the second straight line in the arrangement direction of the first straight line and the second straight line. may be arranged in a region opposite to the side where the first straight line is arranged. In this configuration, the line sensor would be arranged between the first straight line and the second straight line. Therefore, the line sensor receives light from a straight line parallel to the straight line passing through the center of the storage roller and different from the straight line passing through the center of the storage roller in the arrangement direction. That is, since the light reflected by the storage roller or the yarn can be separated by the curved portion of the storage roller, the yarn detection accuracy can be improved.

In the yarn winding machine according to one aspect of the present invention, the portion of the cover where the light from the light emitting portion is incident may be black. In this configuration, the cover absorbs the light from the light-emitting portion that is reflected by the outer peripheral surface of the storage roller. As a result, light reflected from portions other than the yarn is reduced from entering the line sensor, so the yarn detection accuracy can be improved.

In the yarn winding machine according to one aspect of the present invention, the light emitting unit has the white yarn light emitting unit and the colored yarn light emitting unit, and the line sensor has the white yarn light emitting unit that reflects the outer peripheral surface of the storage roller. and is provided at a position such that light from the white yarn light-emitting portion that reflects the yarn stored in the storage roller is incident, and reflects the outer peripheral surface of the storage roller. It may be provided at a position where the light from the colored thread light-emitting portion is incident. With this configuration, even if the yarn used in the yarn winding machine is a white yarn and a colored yarn such as black, by switching the light emitting unit to be emitted between the white yarn light emitting unit and the colored yarn light emitting unit, , the presence or absence of yarn can be detected with high accuracy.

In the yarn winding machine according to one aspect of the present invention, a mode switching unit capable of selectively switching between a white yarn detection mode that is a detection mode for white yarn and a colored yarn detection mode that is a detection mode for colored yarn. When the white thread detection mode is selected, the control section causes the white thread light emitting section to emit light, determines that there is a thread in the portion received by the line sensor, and switches the colored thread detection mode. When selected, it may be determined that there is a thread in a portion where light is not received by the line sensor while causing the colored thread light emitting section to emit light. With this configuration, the yarn used in the yarn winder can be appropriately controlled and determined in accordance with the detection mode.

In the yarn winding machine according to one aspect of the present invention, the line sensor may be provided at a position where the light from the light-emitting portion that reflects off the outer peripheral surface of the storage roller is incident. With this configuration, it is possible to improve the detection accuracy of a black (colored) yarn that is wound around the storage roller and does not easily reflect light.

In the yarn winding machine according to one aspect of the present invention, the control unit rotates at least the storage roller once, and determines the presence or absence of yarn in the storage area based on the detection result of the line sensor when the storage roller is rotated at least once. You can judge. With this configuration, it is possible to detect the distribution of the presence or absence of the yarn on the outer peripheral surface that constitutes the storage roller. That is, it is possible to determine the presence or absence of the yarn in all portions or only necessary portions of the accumulating roller, and to evaluate the outer peripheral surface of the accumulating roller.

In the yarn winding machine according to one aspect of the present invention, at least one recess extending along the rotation axis direction of the storage roller is formed on the outer peripheral surface of the storage roller, and the control unit controls the reference recess It may be determined that the storage roller has rotated once by detecting that has rotated once. With this configuration, it can be determined by a simple method that the storage roller has made one revolution.

In the yarn winding machine according to one aspect of the present invention, the control section may determine the presence or absence of the yarn in the accumulating area based on the detection result of the line sensor at a position different from the recess. With this configuration, for example, it is possible to reduce erroneous determination of the presence or absence of the yarn by the control unit due to whether or not the concave portion is detected by the line sensor.

In the yarn winding machine according to one aspect of the present invention, a plurality of recesses are formed along the rotation direction of the storage roller on the outer peripheral surface of the storage roller, and regions between the recesses adjacent to each other in the rotation direction are formed. are formed, and the control unit may determine the presence or absence of the yarn in the storage area based on the detection result of the line sensor in at least a partial area of each of the plurality of connection parts. With this configuration, it is possible to improve the yarn detection accuracy in the storage roller having the concave portion formed on the outer peripheral surface.

In the yarn winding machine according to one aspect of the present invention, the control unit obtains information regarding the yarn stored in the storage roller based on the amount of yarn supplied from the supply unit and the amount of yarn wound by the winding unit. Based on the information about the yarn and the detection result of the line sensor, it may be determined whether the yarn is evenly wound around the storage area. With this configuration, it can be determined with a simple configuration whether or not the yarn is evenly wound around the storage area.

In the yarn winding machine according to one aspect of the present invention, the winding section winds the yarn delivered from the yarn accumulating device by rotating the winding bobbin to form a package on the winding bobbin, and the control section collects the yarn. Information about the yarn stored in the storage roller may be inferred based on the average value of the difference between the rotation speed of the roller and the rotation speed of the winding bobbin. With this configuration, it is possible to accurately estimate information about the yarn stored in the storage roller.

In the yarn winding machine according to one aspect of the present invention, when the yarn storage amount as the yarn-related information is the estimated storage amount, and the yarn storage amount calculated based on the detection result by the line sensor is the detected storage amount, The control unit may determine that sluffing is occurring in the yarn accumulating device when the difference obtained by subtracting the estimated accumulated amount from the detected accumulated amount is larger than the sluffing determination accumulated amount. Sluffing is a state in which the yarn is not stably unwound from the accumulating roller, and the yarn is unwound at once after being entangled in several layers like a loop coming off. With this configuration, it can be determined with a simple configuration that sluffing has occurred in the storage roller.

In the yarn winding machine according to one aspect of the present invention, the controller determines that the movement amount per unit time of the most downstream position of the yarn stored in the storage area is the sluffing determination movement amount based on the detection result of the line sensor. , it may be determined that sluffing occurs in the yarn accumulating device. With this configuration, it can be determined with a simple configuration that sluffing has occurred in the storage roller.

In the yarn winding machine according to one aspect of the present invention, when the yarn storage amount as the yarn-related information is the estimated storage amount, and the yarn storage amount calculated based on the detection result by the line sensor is the detected storage amount, When the difference obtained by subtracting the detected storage amount from the estimated storage amount becomes larger than the yarn mass determination storage amount, it may be determined that the yarn mass (so-called lump) is generated in the yarn accumulating device. Note that the yarn mass portion refers to a state in which the yarn wound around the outer peripheral surface of the storage roller is unevenly wound in an overlapping state. With this configuration, it can be determined with a simple configuration that a yarn lump portion is generated in the accumulating roller.

According to one aspect of the present invention, it is possible to detect the storage amount of the yarn wound around the yarn storage device with a simple configuration and at low cost.

FIG. 1 is a schematic front view showing the overall configuration of an automatic winder according to one embodiment. FIG. 2 is a schematic side view showing a winder unit according to one embodiment. FIG. 3 is a perspective view of a yarn pooling device included in the winder unit. FIG. 4A is a diagram showing the arrangement relationship between the yarn accumulating device and the detecting section. FIG. 4B is a diagram showing the arrangement relationship between the yarn accumulating device and the light emitting section. FIG. 4C is a diagram showing the arrangement relationship between the yarn accumulating device and the detection unit. FIG. 5A is a plan view of the outer peripheral surface of the storage roller developed so that a part of the outer peripheral surface overlaps in the direction of rotation. FIG. 5B is a plan view of the outer peripheral surface of the storage roller when the yarn is present on the outer peripheral surface of the storage roller so that the outer peripheral surface of the storage roller partially overlaps in the rotational direction. FIG. 5(C) is a plan view of the outer peripheral surface of the storage roller when the yarn and recessed portions are present on the outer peripheral surface of the storage roller so that the outer peripheral surface of the storage roller partially overlaps in the rotational direction. FIG. 6 is a diagram showing an example of a result acquired by a line sensor. FIG. 7A is a diagram showing an example of the relationship between the detected accumulated amount and the estimated accumulated amount in the process of increasing the accumulated amount of yarn in the yarn accumulating device. FIG. 7B is a diagram showing an example of the relationship between the detected accumulated amount and the estimated accumulated amount in the process of decreasing the accumulated amount of yarn in the yarn accumulating device. FIG. 8A is a diagram showing an example of the relationship between the detected accumulated amount and the estimated accumulated amount in the process of increasing the accumulated amount of yarn in the yarn accumulating device. FIG. 8B is a diagram showing an example of the relationship between the detected accumulated amount and the estimated accumulated amount in the process of decreasing the accumulated amount of yarn in the yarn accumulating device. 9(A) and 9(B) are diagrams showing the most downstream position of the yarn stored on the outer peripheral surface. FIG. 10A is a diagram showing the arrangement relationship between the yarn accumulating device and the detection unit of the winder unit according to Modification 1. FIG. FIG. 10B is a diagram showing the arrangement relationship between the yarn accumulating device and the detection unit of the winder unit according to Modification 2. As shown in FIG. FIG. 11 is a diagram illustrating an example of a result acquired by a line sensor according to a modification; FIG. 12A is a diagram showing the arrangement relationship between the yarn accumulating device and the detection unit of the winder unit according to Modification 3. FIG. FIG. 12B is a diagram showing the arrangement relationship between the yarn accumulating device and the detection unit of the winder unit according to Modification 4. As shown in FIG. 13(A) and 13(B) are diagrams showing the arrangement relationship between the yarn accumulating device and the detection unit of the winder unit according to Modification 5. FIG.

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and overlapping descriptions are omitted. "Upstream" and "downstream" mean upstream and downstream, respectively, in the direction of yarn travel.

As shown in FIG. 1, an automatic winder 1 includes a plurality of winder units (yarn winding machines) 2 arranged side by side, a machine base control device 3, a yarn feeding bobbin supply device 4, a doffing device 5, A blower box (not shown) is provided.

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

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

When the package 30 is fully wound in the winder unit 2 (a state in which a specified amount of yarn Y is wound), the doffing device 5 travels to the position of the winder unit 2 and picks up the fully wound package 30. Remove. The doffing device 5 sets the winding bobbin 22 on which the yarn Y is not wound on the winder unit 2 from which the package 30 has been removed.

Next, the configuration of the winder unit 2 will be described. As shown in FIG. 2, the winder unit 2 includes a yarn supplying section (supplying section) 6, a yarn accumulating device 40, a detecting unit 50, a cover 47, a package forming section (winding section) 8, a wax It is provided with the application device 70 and the control unit 25 . In the winder unit 2, the yarn Y from the yarn supplying bobbin 21 of the yarn supplying section 6 is unwound, and after the unwound yarn Y is temporarily stored in the yarn accumulating device 40, the package forming section 8 is accumulated in the yarn accumulating device 40. A package 30 is formed by drawing out the yarn Y and winding it on the winding bobbin 22 .

The yarn supplying section 6 is configured to support the yarn supplying bobbin 21 set on the transport tray 26 at a predetermined position and unwind the yarn Y from the yarn supplying bobbin 21 . When all the yarn Y is unwound from the yarn supplying bobbin 21 , the yarn supplying section 6 discharges the core tube of the yarn supplying bobbin 21 on which the yarn Y is not wound, and supplies a new supply from the yarn supplying bobbin supply device 4 . A supply of yarn bobbins 21 is received.

The yarn accumulating device 40 is arranged in the middle of the yarn running path formed between the yarn supplying section 6 and the package forming section 8 . The yarn accumulating device 40 is provided upstream of the wax applying device 70 in the running direction of the yarn Y. As shown in FIG. The yarn accumulating device 40 winds up the yarn Y unwound by the yarn supplying section 6 and temporarily accumulates it. The yarn accumulating device 40 supplies the accumulated yarn Y to the package forming section 8 .

The yarn accumulating device 40 includes a accumulating roller 41 around which the yarn Y can be wound, a driving motor 45 that drives the accumulating roller 41 to rotate, and a cover 47 . The storage roller 41 temporarily stores the yarn Y by winding the yarn Y around the storage area A of the outer peripheral surface 41d of the storage roller 41 . The storage roller 41 is rotatably supported by the machine base (frame) of the automatic winder 1 about a rotation axis C1 slightly inclined with respect to the horizontal direction. As shown in FIGS. 2 and 3, tapered portions 41a and 41b are formed at both ends of the storage roller 41 in the axial direction, the diameters of which increase toward the ends. A portion between the two tapered portions 41a and 41b is a cylindrical portion 41c having a constant diameter, and an outer peripheral surface 41d thereof is a storage area A around which the yarn Y is wound. An outer peripheral surface 41d of the cylindrical portion 41c is mirror-finished. The two tapered portions 41a and 41b on both end sides prevent the yarn Y wound around the cylindrical portion 41c from coming off.

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

A first recessed portion (recessed portion) 43a is provided in an outer peripheral surface 41d of the storage roller 41 in a region straddling the mounting position of the ring member 42 in the direction along the rotation axis C1. That is, when viewed from the radially outer side of the storage roller 41, the first recess 43a is provided so as to pass through the mounting position of the ring member 42 and intersects with the mounting position. It overlaps with the mounting position. The first concave portion 43a here constitutes a groove portion extending from one end to the other end of the storage roller 41 in the direction along the rotation axis C1. The first recess 43a has, for example, the same cross-sectional shape in the longitudinal direction and is formed in a substantially rectangular cross-section. The outer peripheral surface 41d of the storage roller 41 is further provided with a second recess (recess) 43b. The second recessed portion (recessed portion) 43b is provided so that a recess (so-called sink mark) is not formed when forming a boss or a reinforcing rib for embedding the sensor magnet in the inner peripheral surface 41g of the cylindrical portion 41c. It is a recess (so-called meat nusumi) (downgage).

The drive motor 45 rotates the storage roller 41 in the direction in which the yarn Y from the yarn supplying section 6 is wound. The drive motor 45 can also rotate the storage roller 41 in a direction opposite to the winding direction. The drive motor 45 is a position controllable motor such as a DC brushless motor, a stepping motor, or a servo motor.

A downstream yarn blowing section 80 is arranged in the vicinity of the tapered portion 41a on one end side of the storage roller 41 (upstream side of the storage roller 41). The downstream yarn blowing portion 80 is arranged close to the outer peripheral surface 41 d of the storage roller 41 . During normal yarn winding, the yarn on the yarn supplying section 6 side passes through the downstream yarn blowing section 80 and is guided to the tapered portion 41 a on the one end side of the accumulating roller 41 . When the driving motor 45 is driven to rotate the storage roller 41 in one direction, the yarn Y guided to the tapered portion 41a on the one end side of the storage roller 41 by the downstream yarn blowing portion 80 is pushed to the one end of the cylindrical portion 41c. While pushing up the previous thread layer from the side (upstream side), it winds up sequentially. As a result, the yarn Y already wound on the outer peripheral surface 41d of the storage roller 41 is pushed by the newly wound yarn Y, and is sequentially fed to the other end side (downstream side). As a result, on the outer peripheral surface of the cylindrical portion 41c of the storage roller 41, the yarn Y is arranged in a spiral shape and wound regularly from one end to the other end.

The yarn Y wound around the storage roller 41 is pulled out from the tapered portion 41b on the other end side of the storage roller 41 (upstream side of the storage roller 41) and sent downstream (package forming section 8 side). In the tapered portion 41b, the yarn Y on the storage roller 41 is pulled downstream through the pull-out guide 37 positioned on the extension line of the rotation axis C1 of the storage roller 41. As shown in FIG. The yarn Y wound around the storage roller 41 is unwound through the space between the ring member 42 and the yarn Y to be unwound.

The detector 53 is arranged near the outer peripheral surface 41 d of the cylindrical portion 41 c of the storage roller 41 . For example, the detection unit 53 can detect that the amount of yarn Y on the storage roller 41 is equal to or greater than a predetermined upper limit amount and that the amount is less than a predetermined lower limit amount. The detection unit 53 may set the detection range from the above upper limit amount to the above lower limit amount. In addition, the detection range may be a wider range including the portion exceeding the above upper limit amount and the portion below the above lower limit amount. This makes it possible, for example, to detect an amount exceeding the above upper limit. In this embodiment, it is detected that the amount of yarn Y on the storage roller 41 is equal to or greater than a predetermined upper limit amount and that it is less than a predetermined lower limit amount within the detection range. In addition, more than and less than in the above can be appropriately defined as more than and less than. A detection result by the detection unit 53 is acquired by the control unit 25 . The control unit 25 controls the drive motor 45 based on the detection result of the detection unit 53 so that the storage amount (winding amount) of the storage roller 41 falls between the upper limit amount and the lower limit amount.

The detection unit 53 detects the yarn Y wound around the outer peripheral surface 41 d of the storage roller 41 . As shown in FIGS. 4A to 4C, the detection section 53 forms a detection unit 50 together with a light emission section 55 that emits light toward the storage roller 41. As shown in FIG. That is, the detection unit 50 includes a detection section 53 and a light emission section 55 . The detection unit 53 and the light emission unit 55 are housed in the housing 51 and fixed to the machine base of the automatic winder 1 .

The detecting portion 53 connects an upstream end 41f in the running direction of the yarn Y and a downstream end 41e in the running direction of the yarn Y in the storage area A formed on the outer peripheral surface 41d of the cylindrical portion 41c. It has a line sensor 53A that detects the presence or absence of the yarn Y in the straight section S1, and a lens 53B that reduces incident light. An example of the line sensor 53A is a CCD image sensor or a CMOS image sensor that acquires the amount of light using photodiodes arranged in a line. The line sensor 53A receives light through a lens 53B that reduces incident light. In this embodiment, the line sensor 53A is provided so that the extending direction of the straight section S1 is parallel to the extending direction of the rotation axis C1. A line sensor 53A may be provided so as to intersect the direction.

The light emitting section 55 has two light sources 55B, 55B and an optical waveguide 55C that converts the light emitted from the two light sources 55B, 55B into surface light emission and emits the light toward the storage roller 41 . Some of the constituent elements of the optical waveguide 55C include a diffusion plate such as an acrylic plate that guides light. An example of the two light sources 55B, 55B is an LED (Light Emitting Diode), which is provided on the LED substrate 55A. Note that the number of light sources is not limited to two.

The line sensor 53A is configured so that the light from the light emitting portion 55 that reflects the outer peripheral surface 41d of the storage roller 41 does not enter and the light from the light emitting portion 55 that reflects the yarn Y stored in the storage roller 41 enters. It is positioned like this. For example, the line sensor 53A emits light at an irradiation angle θ in the range of 0° to 30°, as shown in FIG. 4(C). "The line sensor 53A is arranged so that the light from the light emitting section 55 that reflects off the outer peripheral surface 41d of the storage roller 41 does not enter" means that the light emitted from the light emitting section 55 at such an angle is reflected by the storage roller. This means that the line sensor 53A is arranged at a position where the light is totally reflected by the outer peripheral surface 41d of the sensor 41 and the reflected light does not enter.

Here, one of the straight lines perpendicular to the rotation axis C1 is imaginarily set as a first straight line L1, and one of the straight lines parallel to the first straight line L1 and in contact with the outer peripheral surface 41d of the storage roller 41 is imaginary second straight line L2. set In this embodiment, in a plan view viewed from the direction in which the rotation axis C1 of the storage roller 41 extends, the light emitting unit 55 is on the first straight line L1 or in the arrangement direction of the first straight line L1 and the second straight line L2. It is arranged between 53A and the first straight line L1. Thereby, the light emitting section 55 can emit light to a portion of the storage roller 41 located between the first straight line L1 and the second straight line L2. The line sensor 53A is arranged between the second straight line L2 and the first straight line L1. The light receiving direction of the line sensor 53A is substantially parallel to the first straight line L1. In other words, light enters the line sensor 53A from a direction substantially parallel to the first straight line L1. The cover 47 is arranged in a region opposite to the side where the first straight line L1 is arranged with respect to the second straight line L2 in the arrangement direction of the first straight line L1 and the second straight line.

The cover 47 is provided so as to face part of the outer peripheral surface 41 d of the storage roller 41 . The cover 47 is provided on at least part of the traveling direction of the light from the light emitting portion 55 that reflects the outer peripheral surface 41 d of the storage roller 41 . The cover 47 may also be provided at least partially in the traveling direction of the light from the light emitting section 55 that does not reflect the outer peripheral surface 41 d of the storage roller 41 . At least a portion of the facing surface 47a, which is a portion of the cover 47 where the light from the light emitting portion 55 is incident, is formed to have a color (for example, black) that reduces the reflectance of light. By reducing the reflectance in this way, it is possible to prevent the reflected light from the cover 47 from entering the storage roller 41 . This can prevent the light reflected by the cover 47 from being detected by the line sensor 53A and the light reflected by the yarn Y from not being properly detected.

Even if the cover 47 is not provided, the periphery of the yarn accumulating device 40 may be configured so as not to dispose a structural portion that reflects light in the traveling direction of the light from the light emitting portion 55 . Even if a structure that reflects light in the traveling direction of the light from the light emitting unit 55 is arranged, the structure should be arranged in such a position that the reflected light is sufficiently attenuated when it reaches the line sensor 53A. , it is possible to prevent the light reflected from the yarn Y from being properly detected.

As shown in FIGS. 1 and 2, the package forming section 8 includes a cradle 23 on which a winding bobbin 22 can be mounted, and a traverse drum 24 for driving the winding bobbin 22 while traversing the yarn Y. and have. The package forming section 8 constitutes a winding section. The cradle 23 rotatably supports the winding bobbin 22 (or package 30). The cradle 23 is configured so that the outer peripheral surface of the supported package 30 can come into contact with the outer peripheral surface of the traverse drum 24 .

The traverse drum 24 is rotationally driven by a drive source (an electric motor or the like) (not shown), and rotates while being in contact with the outer peripheral surface of the winding bobbin 22 or the package 30, thereby causing the winding bobbin 22 to rotate. As a result, the yarn Y stored in the yarn storage device 40 can be unwound, pulled out, and wound onto the winding bobbin 22 . A traverse groove (not shown) is formed on the outer peripheral surface of the traverse drum 24, and the traverse groove enables the yarn Y to be traversed in a predetermined width. With the above configuration, the package 30 having a predetermined shape can be formed by winding the yarn Y around the winding bobbin 22 while traversing it.

The wax applying device 70 is arranged between the yarn accumulating device 40 and the package forming section 8 . The wax applying device 70 applies wax to the yarn Y traveling from the yarn accumulating device 40 toward the package forming section 8 .

The winder unit 2 includes various devices in the yarn running path from the yarn supplying section 6 to the package forming section 8 via the yarn accumulating device 40 . Specifically, the yarn path (yarn running path) of the yarn Y includes the unwinding auxiliary device 10 and the bobbin yarn feeler 11 in order from the upstream yarn supplying section 6 side to the downstream yarn pooling device 40 side. , a tension applying section 12, a catching device 13, a yarn splicing device 14, a yarn monitoring device 16, and a downstream yarn blowing section 80 are arranged.

The unwinding auxiliary device 10 brings the movable member 27 into contact with the balloon formed above the yarn supplying bobbin 21 by swinging the yarn Y unwound from the yarn supplying bobbin 21, and appropriately adjusts the size of the balloon. The unwinding of the yarn Y is assisted by controlling the

The bobbin thread feeler 11 is arranged at a position close to the unwinding assist device 10 on the downstream side of the unwinding assist device 10 . The bobbin thread feeler 11 defines the presence or absence of the thread Y supplied from the unwinding assist device 10 .

The tension applying section 12 applies a predetermined tension to the running yarn Y. As shown in FIG. The tension applying unit 12 applies a predetermined tension to the yarn Y based on the tension of the yarn Y detected by a tension sensor (not shown). The tension applying section 12 is configured in a gate type in which movable comb teeth are arranged with respect to fixed comb teeth, and a predetermined resistance is applied by causing the yarn Y to run between the comb teeth. The comb teeth on the movable side are configured to be movable by, for example, a solenoid so that the comb teeth are engaged or disengaged. Thereby, the tension applying section 12 can adjust the tension applied to the yarn Y. As shown in FIG. The configuration of the tension applying section 12 is not particularly limited, and may be, for example, a disk-type tension applying section.

The catching device 13 is arranged downstream of the tension applying section 12 . The catching device 13 has a first catching portion 13A and a second catching portion 13B. In this embodiment, the first catching portion 13A and the second catching portion 13B are integrated and configured as one component. Each of the first trapping portion 13A and the second trapping portion 13B is connected to a negative pressure source (not shown).

The first catching portion 13A is configured as a tubular member having an opening formed at its tip. The first catching portion 13A generates a suction air flow during yarn joining, sucks and catches the yarn Y on the yarn accumulating device 40 side.

The second catching portion 13B is configured as a tubular member having an opening formed at the tip. The second catching portion 13B is provided swingably. The second catching portion 13B has a catching position (first position) (the position indicated by the solid line in FIG. 2) for catching the yarn Y supplied from the unwinding assist device 10, and a guiding position for guiding the yarn Y to the yarn joining device 14. It swings between the position (second position) (the position indicated by the dashed line in FIG. 2). The catching position may be the standby position of the second catching part 13B.

At the catching position, the second catching section 13B generates a suction air flow on the tip side thereof in a state of being close to the yarn path on the downstream side of the bobbin thread feeler 11, thereby catching the yarn end from the yarn supplying bobbin 21. is aspirated and captured. When the yarn Y is cut by the cutter 15, the second catching portion 13B sucks and catches the yarn end of the cut yarn Y on the yarn supplying bobbin 21 side. Further, the second catching portion 13B may be configured to suck and remove fluff or the like adhering to the running yarn Y by generating a suction air flow on the tip side thereof.

When the yarn Y is caught by the second catching portion 13B, immediately after the new yarn supplying bobbin 21 is supplied to the yarn supplying portion 6, the position on the downstream side of the bobbin thread feeler 11 (the tip of the second catching portion 13B ) is provided for blowing the yarn end.

The auxiliary blowing unit 28 blows compressed air into the hollow carrier tray 26 and the inside of the yarn supplying bobbin 21 , thereby blowing the yarn Y of the yarn supplying bobbin 21 onto the leading end of the yarn supplying bobbin 21 . An air flow that blows toward the bobbin thread feeler 11 side is formed. When the newly supplied yarn supplying bobbin 21 is supported by the yarn supplying portion 6, the auxiliary blowing portion 28 operates to reliably move the yarn end of the yarn supplying bobbin 21 side toward the bobbin thread feeler 11 side. can send.

The yarn splicing device 14 splices the split yarn Y. As shown in FIG. The yarn joining device 14 detects a yarn defect by the yarn monitoring device 16 and cuts the yarn Y with the cutter 15, when the yarn Y being unwound from the yarn supplying bobbin 21 is cut, or when the yarn Y is cut. When the yarn Y between the yarn supplying bobbin 21 and the yarn accumulating device 40 is cut, such as when the bobbin 21 is replaced, the yarn Y on the yarn supplying bobbin 21 side and the yarn accumulating device 40 are separated from each other. The yarn Y on the side is spliced. The yarn splicing device 14 is arranged at a position slightly retracted from the yarn path. The yarn splicing device 14 can connect the introduced yarn ends to make the yarn Y continuous. As the yarn splicing device 14, a device using a fluid such as compressed air or a mechanical device can be used.

The yarn monitoring device 16 detects yarn defects such as slabs and foreign matter contamination by monitoring the thickness of the yarn Y with an appropriate sensor. A cutter 15 is arranged at a position close to the yarn monitoring device 16 on the upstream side of the yarn monitoring device 16 . The cutter 15 cuts the yarn Y immediately when the yarn monitoring device 16 detects a yarn defect. The cutter 15 and the thread monitoring device 16 are housed in a common housing 19 . A housing 19 containing the yarn monitoring device 16 is arranged downstream of the yarn splicing device 14 .

The downstream yarn blowing section 80 is an air sucker device arranged at a position close to the yarn accumulating device 40 on the upstream side of the yarn accumulating device 40 . The downstream yarn blowing section 80 ejects compressed air to suck the yarn end on the side of the yarn accumulating device 40 existing above the accumulating area A of the accumulating roller 41, blow it off, and send it to the first catching section 13A. to form Specifically, the downstream yarn blowing section 80 includes a narrow tubular guide member (not shown) through which the yarn Y can pass, a yarn guide member 60 which is a curved tubular member, It has A nozzle for the yarn Y is formed at one end of the guide member. The yarn guide member 60 is provided so as to be close to the outlet of the downstream yarn blow-off section 80 . Openings are formed at both ends of the thread guide member 60 in the longitudinal direction.

The yarn guide member 60 is arranged with an opening on one end facing the outlet of the downstream yarn blow-off portion 80 and an opening on the other end facing the first catching portion 13A. A guide path is formed inside the thread guide member 60 . The guide path connects openings at both ends of the yarn guide member 60 so as to bypass the yarn monitoring device 16, the yarn joining device 14, and the like. A storage side yarn end catching device 75 is configured by the downstream yarn blowing section 80, the yarn guiding member 60, and the first catching section 13A.

When the yarn Y is cut off between the yarn supplying bobbin 21 and the yarn accumulating device 40, the downstream yarn blowing section 80 captures the yarn Y on the yarn accumulating device 40 side and guides the yarn guide member 60 along the guide path. Then, the yarn Y is pulled out along the guide path and caught by the first catching portion 13A. Note that since the thread guide member 60 has an unillustrated penetrating slit formed over its entire length, the thread Y is pulled from the inside of the thread guide member 60 while the thread Y is captured by the first catching portion 13A. can be pulled out. As described above, the yarn Y on the yarn pooling device 40 side can be blown forward by the downstream yarn blowing section 80 and guided toward the yarn joining device 14 side.

Each winder unit 2 has a control section 25 . The control unit 25 includes hardware such as a CPU, ROM, and RAM (not shown). Software such as a control program is stored in the RAM. The control unit 25 controls each component of the winder unit 2 through cooperation of hardware and software. The control unit 25 is configured to be able to communicate with the machine control device 3 . Thereby, the operations of the plurality of winder units 2 provided in the automatic winder 1 can be centrally managed by the machine control device 3 .

The controller 25 of the present embodiment determines whether or not the yarn Y is present on the outer peripheral surface 41 d (storage area A) of the storage roller 41 . The control unit 25 determines the presence or absence of the yarn Y on the outer peripheral surface 41d based on the detection result of the line sensor 53A. FIG. 5(A) is a plan view of the outer peripheral surface 41d of the storage roller 41 developed so as to partially overlap in the rotational direction. The line sensor 53A detects the presence or absence of the yarn Y in the range R shown in FIG. 5(A). More specifically, the control unit 25 rotates the storage roller 41 once at a low speed (less than 200 rpm), and adjusts the yarn Y on the outer peripheral surface 41d based on the detection result of the line sensor 53A when the storage roller 41 rotates once. Determine the presence or absence of

The storage roller 41 may be rotated at a high speed (200 rpm or higher) and the presence or absence of the yarn Y on the outer peripheral surface 41d may be determined based on the detection result of the line sensor 53A when the storage roller 41 is rotated once. . In the line sensor 53A of the present embodiment, the storage roller 41 that rotates at high speed is less affected by the light reflected by the first concave portion 43a and the second concave portion 43b. Therefore, the storage amount can be detected by ignoring the light reflected by the first concave portion 43a and the second concave portion 43b. In this case, as shown in FIG. 5(C), a portion YC where the yarns Y are densely packed has a large amount of reflected light, and is easily detected by the line sensor 53A. On the other hand, the single yarn portion Y1 pulled out from the portion YC where the yarns Y are densely packed has less reflected light and is less likely to be detected by the line sensor 53A.

For example, as shown in FIG. 4C, when the yarn Y is present on the outer peripheral surface 41d of the storage roller 41, the control unit 25 controls the light emitted from the light emitting unit 55 so that the light emitted from the outer peripheral surface 41d Even if the light is reflected by the line sensor 53A, it is reflected toward the cover 47 side. Instead, when the yarn Y exists on the outer peripheral surface 41d, the light reflected by the yarn Y is reflected toward the line sensor 53A and detected by the line sensor 53A.

The detection result by the line sensor 53A at this time is acquired by the control unit 25 as data as shown in FIG. 6, for example. In the data shown in FIG. 6, the area where relatively much light is detected, that is, the area where a whitish image is obtained when converted to a BMP image indicates the area where the thread (white thread) Y is detected. A region where less light is detected, that is, a region where a blackish image is obtained when converted to a BMP image indicates a region where the thread (white thread) Y is not detected. A pixel position (pixel) in the detection result of the line sensor 53A indicates a position in the straight section S1. That is, the control unit 25 can determine where the yarn Y is and where the yarn Y is absent in the straight section S1 based on the detection result of the line sensor 53A. Thus, the controller 25 can accurately detect the presence or absence of the yarn Y in the range R shown in FIG. 5B based on the amount of light detected by the line sensor 53A.

As described above, the first recessed portion 43a and the second recessed portion 43b are formed in the outer peripheral surface 41d of the storage roller 41 of the present embodiment. The control unit 25 determines that the storage roller 41 has rotated once by detecting that the reference first recessed portion 43a has rotated once. The control unit 25 can grasp the positions of the first recessed portion 43a and the second recessed portion 43b by the amount of rotation of the motor and by providing a mark (for example, magnetism) at the location of the recessed portion. However, the light reflected by the first concave portion 43a and the second concave portion 43b may be reflected toward the line sensor 53A. In this case, even if the controller 25 detects the presence or absence of the yarn Y based on the detection result of the line sensor 53A, it cannot detect it accurately.

Therefore, the control unit 25 of the present embodiment determines the presence or absence of the yarn Y on the outer peripheral surface 41d based on the detection results of the line sensor 53A at positions different from the first concave portion 43a and the second concave portion 43b. Specifically, the control unit 25 determines the presence or absence of the yarn Y on the outer peripheral surface 41d based on the detection results of the line sensor 53A in all regions where the first recessed portion 43a and the second recessed portion 43b are not formed. More specifically, as shown in FIG. 5C, the outer peripheral surface 41d of the storage roller 41 has a plurality of recesses (first recesses 43a and second recesses 43b) along the rotation direction of the storage roller 41. A plurality of connection portions 41h, which are regions between adjacent recesses in the rotation direction, are formed. The control unit 25 determines the presence or absence of the yarn Y in the storage area A based on the detection result of the line sensor 53A in at least a partial area of each of the plurality of connection parts 41h.

The control unit 25 may obtain data from the line sensor 53A in a region where the first recessed portion 43a and the second recessed portion 43b are not present, with the storage roller 41 stopped rotating. The control unit 25 can grasp the position where the first concave portion 43a and the second concave portion 43b are not present by providing a mark (for example, magnetism, etc.) at the position of the concave portion or the amount of rotation of the motor. In other words, the controller 25 may acquire data from the line sensor 53A while intermittently rotating the storage roller 41 . Note that the control unit 25 may detect only a necessary portion by rotating the storage roller 41 at a low speed. Further, by rotating the storage roller 41, the control unit 25 always causes the line sensor 53A to detect, and determines the presence or absence of the yarn Y on the outer peripheral surface 41d only at the first recessed portion 43a and the second recessed portion 43b. No processing is required.

Next, a method for determining whether or not sluffing is occurring by the control unit 25 will be described. Based on the amount of yarn Y supplied from the yarn supplying section 6 and the amount of yarn Y wound by the package forming section 8, the control section 25 infers information regarding the yarn Y stored in the storage roller 41. FIG. Then, the control unit 25 determines whether or not the yarn Y is evenly wound around the outer peripheral surface 41d based on the estimated information about the yarn Y and the detection result of the line sensor 53A. Examples of information about the yarn stored in the storage roller 41 include the amount of storage, the length of the yarn, and the width of the area around which the yarn Y is wound on the outer peripheral surface 41d. Based on the average value of the difference between the rotation speed of the storage roller 41 and the rotation speed of the winding bobbin 22 , the control section 25 estimates information about the yarn Y stored in the storage roller 41 . Further, for example, a value obtained by multiplying the time during which the yarn Y is detected by the yarn monitoring device 16 or the bobbin yarn feeler 11 by the yarn speed (unwinding speed) and a sensor provided downstream of the storage roller 41, and the sensor Information about the yarn Y stored in the storage roller 41 may be estimated based on a value obtained by multiplying the detection time by the yarn speed (winding speed). Since the yarn speed in this case is not always constant, it is preferable to use the average speed.

Specific examples of the case where the yarn Y is not evenly wound around the outer peripheral surface 41d include sluffing and yarn lumps. Sluffing refers to a state in which the yarn Y is not stably unwound from the storage roller 41, and several layers of the yarn Y are entangled and unwound at once like a loop coming off. The yarn mass portion means that the yarn Y wound around the outer peripheral surface 41d of the storage roller 41 is not uniform along the rotation axis C1 of the storage roller 41, and the yarn Y is not evenly distributed along the rotation axis C1 of the storage roller 41. It refers to the state of being wound in an overlapping state.

As shown in FIG. 7A, in the process in which the amount V of the yarn Y stored in the yarn accumulating device 40 is increasing, the control unit 25 subtracts the estimated amount S from the detected amount C to obtain a difference D becomes larger than the sluffing determination storage amount T1, that is, in the circled portion in FIG. More specifically, if the threshold is exceeded only once, there is a possibility of false detection, so multiple times in a row (for example, three times in a row), or multiple times in a predetermined period (for example, three detection opportunities) Of these, two times are greater than the threshold value (but not necessarily two consecutive times), it is determined that sluffing is occurring. Of course, if it is detected even once, it may be determined that sluffing has occurred.

The estimated storage amount S is the storage amount V of the yarn Y as information about the yarn Y, and the detected storage amount C is the storage amount V of the yarn Y calculated based on the detection result of the line sensor 53A. say. The fact that the difference D is larger than the sluffing determination storage amount T1 means that the actual winding width is larger than the width when the yarn Y is uniformly wound around the outer peripheral surface 41d of the storage roller 41. . That is, it can be determined that sluffing is occurring. Further, as shown in FIG. 7B, in the process in which the amount V of the yarn Y stored in the yarn accumulating device 40 decreases, the controller 25 subtracts the estimated amount S from the detected amount C. When the difference D becomes larger than the sluffing determination storage amount T1, that is, in the circled portion in FIG. The reasons for determination are the same as those in the process of increasing the amount V of the yarn Y stored in the yarn accumulating device 40 .

More specifically, the estimated storage amount S is obtained by multiplying the average value of the difference between the rotation speed of the storage roller 41 and the rotation speed of the winding bobbin 22 during a certain period of time by time. Alternatively, the difference D may be obtained based on the detection result of the line sensor 53A and the height of the yarn Y stored in the storage roller 41. FIG. As for the storage height, the number of windings of the yarn Y around the storage roller 41 is calculated by dividing the estimated storage amount S by the circumferential length of the storage roller 41, and the thickness of the yarn Y is calculated as the number of windings of the yarn Y. It can be calculated by multiplication.

Instead of the above-described sluffing detection method, the control unit 25 determines the state of the outer peripheral surface 41d from the state shown in FIG. 8A to the state shown in FIG. When the movement amount per unit time of the most downstream position YP of the yarn Y stored in the storage device 40 becomes larger than the sluffing determination movement amount T2, it is determined that sluffing occurs in the yarn storage device 40. good.

Next, the method by which the control unit 25 determines whether or not the yarn lump portion is generated will be described. As described above, the control unit 25 sets the yarn Y storage amount V as information about the yarn Y as the estimated storage amount S, and the yarn Y storage amount V calculated based on the detection result of the line sensor 53A as the detected storage amount. C, as shown in FIG. 9A, in the process in which the amount V of the yarn Y stored in the yarn storage device 40 increases, the difference D obtained by subtracting the detected storage amount C from the estimated storage amount S becomes greater than the yarn lump determination storage amount T3, that is, it is determined that a yarn lump has occurred in the yarn accumulating device 40 for the circled portion in FIG. 9(A). More specifically, if the threshold is exceeded only once, there is a possibility of false detection, so multiple times in a row (for example, three times in a row), or multiple times in a predetermined period (for example, three detection opportunities) Of these, two times are larger than the threshold value (but it does not have to be two consecutive times). Of course, it may be determined that the yarn lump portion is generated when it is detected even once.

The fact that the difference D is larger than the yarn lump portion determination storage amount T3 means that the actual winding width is smaller than the width when the yarn Y wound around the outer peripheral surface 41d of the storage roller 41 is evenly wound. do. That is, it can be determined that a thread mass portion is generated. Further, as shown in FIG. 9B, in the process in which the amount V of the yarn Y stored in the yarn accumulating device 40 decreases, the difference D obtained by subtracting the detected amount of storage C from the estimated amount of storage S is the yarn mass. It is determined that the yarn lump portion is generated in the yarn accumulating device 40 when it becomes larger than the partial determination storage amount T3, that is, for the circled portion in FIG. 9(B). The reason why it is possible to determine that the yarn lump portion is generated is the same as in the process of increasing the amount V of the yarn Y stored in the yarn pooling device 40 .

The effects of the winder unit 2 of the above embodiment will be described. In the winder unit 2 of the above-described embodiment, as shown in FIG. 4A, the line sensor 53A for detecting the yarn Y wound around the outer peripheral surface 41d of the storage roller 41 is located on the outer peripheral surface 41d (storage area A). It is composed of a line sensor 53A that detects the presence or absence of the yarn in the straight section S1 connecting the upstream end in the yarn traveling direction and the downstream end in the yarn traveling direction. As a result, the presence or absence of the yarn Y in the straight section S1 in the storage area A can be detected without providing sensors for detecting the presence or absence of the yarn Y at various locations in the storage area A. As a result, the storage amount V of the yarn Y wound around the yarn accumulating device 40 can be detected with a simple configuration and at a low cost.

As shown in FIG. 4B, the winder unit 2 of the above-described embodiment has the light emitting portion 55 that emits light toward the storage roller 41. Therefore, the intensity of the light received by the line sensor 53A ( contrast) can be applied, and the detection accuracy of the yarn Y by the control unit 25 can be improved.

As shown in FIG. 4B, the light emitting portion 55 of the winder unit 2 of the above-described embodiment has two light sources 55B, 55B and converts the light emitted from the two light sources 55B, 55B into surface light emission. and the optical waveguide 55C that emits toward the storage roller 41, the light emitted from the light emitting portion 55 can be made uniform. Thereby, the accuracy in detecting the yarn Y can be improved. Further, as shown in FIG. 4A, the line sensor 53A of the winder unit of the above-described embodiment is configured to receive light through a lens 53B that reduces incident light. can be provided compactly.

As shown in FIG. 4C, the line sensor 53A of the winder unit 2 of the above-described embodiment prevents light from the light-emitting portion 55 that reflects off the outer peripheral surface 41d of the storage roller 41 from entering the storage roller. It is provided at a position where the light from the light emitting portion 55 that reflects the yarn Y stored in 41 is incident. As a result, it is possible to improve the detection accuracy of the whitish yarn Y which is wound around the storage roller 41 and which tends to reflect light. Specifically, in the configuration of the winder unit 2 of the above-described embodiment, the presence or absence of the yarn Y is detected based on the reflected light only from the yarn Y stored in the storage roller 41, and the portion other than the yarn Y is detected. Since the incidence of the reflected light on the line sensor 53A is reduced, the detection accuracy of the yarn Y can be improved.

As shown in FIG. 4C, the yarn accumulating device 40 of the winder unit 2 of the above embodiment includes a cover 47 that faces a portion of the outer peripheral surface 41d of the accumulating roller 41. The cover 47 It is provided in a part of the traveling direction of the light from the light emitting portion 55 that reflects off the outer peripheral surface 41 d of the storage roller 41 . As a result, fluff generated in the storage roller 41 can be prevented from scattering in various places, and the airflow generated by the rotation of the storage roller 41 can be controlled to prevent the yarn end from contacting the surrounding structure. Furthermore, since the cover 47 has a black facing surface 47a on which the light from the light emitting part 55 is incident, the light from the light emitting part 55 reflected by the outer peripheral surface 41d of the storage roller 41 can be absorbed. As a result, light reflected from portions other than the yarn Y (disturbance light) is less likely to enter the line sensor 53A, so that the yarn Y detection accuracy by the controller 25 can be improved.

The control unit 25 of the winder unit 2 of the above-described embodiment rotates at least the storage roller 41 once, and determines the presence or absence of the yarn Y in the storage area A based on the detection result of the line sensor 53A when the storage roller 41 is rotated once. are judging. As a result, it is possible to detect the presence or absence of the yarn Y in the entire area of the outer peripheral surface 41d that constitutes the storage roller 41, so that the detection accuracy of the yarn Y by the controller 25 can be increased.

In the winder unit 2 , when a defect is found in the yarn Y or the like and the yarn Y stored in the storage roller 41 is unwound or removed, the yarn Y may remain on the storage roller 41 . Then, when the yarn joining is started with the yarn Y remaining in this way and the new yarn Y is stored in the storage roller 41, the yarn Y may get tangled or the yarn may break. In the winder unit 2 of the above-described embodiment, when the controller 25 confirms that the yarn Y is present, the operation of accumulating the yarn Y in the accumulating roller 41 may be prohibited. In this case, the operation of storing the yarn Y in the storage roller 41 can be stopped in advance while the yarn Y remains on the storage roller 41, so that the yarn Y is not tangled or broken in the winder unit 2. You can prevent it from happening. Further, when the control unit 25 confirms that the yarn Y is present, the operator may be notified of this fact.

The controller 25 of the winder unit 2 of the above-described embodiment determines that the storage roller 41 has rotated once by detecting that the reference first concave portion 43a has rotated once. Thereby, the control unit 25 can determine that the storage roller 41 has made one rotation by a simple method.

The control section 25 of the winder unit 2 of the above embodiment determines the presence or absence of the yarn Y in the storage area A based on the detection results of the line sensor 53A at positions different from the first recess 43a and the second recess 43b. As a result, it is possible to reduce erroneous determination of the presence or absence of the yarn Y by the control unit 25 due to whether or not the first recess 43a and the second recess 43b are detected by the line sensor 53A.

The control section 25 of the winder unit 2 of the above embodiment determines whether or not the yarn Y exists in the storage area A based on the detection results of the line sensor 53A at all positions where the first recess 43a and the second recess 43b are not formed. are doing. This makes it possible to improve the detection accuracy of the yarn Y in the storage roller 41 having the first concave portion 43a and the second concave portion 43b formed on the outer peripheral surface 41d.

The control section 25 of the winder unit 2 of the above-described embodiment stores the amount of the yarn Y in the storage roller 41 estimated based on the amount of the yarn Y supplied from the yarn supplying section 6 and the amount of the yarn Y wound by the package forming section 8. Whether or not the yarn Y is evenly wound around the storage area A is determined based on the information on the yarn (estimated storage amount S) and the detection result of the line sensor 53A. This makes it possible to determine whether or not the yarn Y is evenly wound around the storage area A with a simple configuration. Further, the control unit 25 estimates information (estimated storage amount S) regarding the yarn Y stored in the storage roller 41 based on the average value of the difference between the rotation speed of the storage roller 41 and the rotation speed of the winding bobbin 22. are doing. Accordingly, information regarding the yarn Y stored in the storage roller 41 can be accurately estimated.

As shown in FIGS. 7A and 7B, the control unit 25 of the winder unit 2 of the above embodiment determines that the difference D obtained by subtracting the estimated storage amount S from the detected storage amount C is sluffing determination. When it becomes larger than the storage amount T1, it is determined that the yarn storage device 40 is sluffing. As a result, it can be determined that sluffing is occurring in the storage roller 41 with a simple configuration.

As shown in FIGS. 8A and 8B, the control section 25 of the winder unit 2 according to the above embodiment controls the yarn Y stored in the storage area A based on the detection result of the line sensor 53A. When the amount of movement of the most downstream position YP per unit time becomes larger than the sluffing determination movement amount T2, it is determined that the yarn accumulating device 40 is sluffing. In this case as well, it can be determined that sluffing has occurred in the storage roller 41 with a simple configuration.

In the winder unit 2, if such sluffing occurs, the tension of the yarn Y may increase, or the yarn Y from the storage roller 41 may not be unwound properly, resulting in yarn breakage. get higher In the winder unit 2 of the above-described embodiment, when the controller 25 confirms that sluffing has occurred, the tension control of the yarn Y or the speed control of the yarn Y is executed to Yarn breakage can be stopped before it happens. Moreover, when it is confirmed by the control part 25 that sluffing has occurred, it may be configured to inform the operator of that fact.

As shown in FIGS. 8A and 8B, the control section 25 of the winder unit 2 of the above-described embodiment determines the difference D obtained by subtracting the detected storage amount C from the estimated storage amount S. When it becomes larger than the determination storage amount T3, it is determined that the yarn lump portion is generated in the yarn pooling device 40 . As a result, it can be determined with a simple configuration that a yarn lump portion is generated in the storage roller 41 .

In the winder unit 2, if such a yarn lump portion occurs, the above-described sluffing may be induced, or the yarn Y from the storage roller 41 may not be unwound properly, resulting in yarn breakage. get higher In the winder unit 2 of the above-described embodiment, when the control unit 25 confirms that there is a yarn lump portion, the rotation of the storage roller 41 is stopped, and the package forming unit 8 arranged downstream of the storage roller 41 winds the yarn. By executing the control to wind the yarn mass portion, it is possible to prevent the yarn breakage described above. Further, when it is confirmed by the controller 25 that the yarn lump portion is generated, it may be configured to notify the operator to that effect. Alternatively, even when sluffing occurs, the package forming section 8 may wind the yarn by the same control as in the case of the yarn mass section.

Although one embodiment has been described above, the present invention is not limited to the above embodiment. Various modifications are possible without departing from the gist of the invention.

(Modification 1)
In the winder unit 2 of the above-described embodiment, the line sensor 53A prevents the light from the light-emitting portion 55, which reflects off the outer peripheral surface 41d of the storage roller 41, from entering, as shown in FIG. 4C. Although an example in which the light from the light emitting portion 55 that reflects the yarn Y accumulated on the roller 41 is incident has been described, the present invention is not limited to this. For example, as shown in FIG. 10A, the line sensor 53A may be provided at a position where the light from the light emitting section 55 reflecting off the outer peripheral surface 41d of the storage roller 41 is incident. In the configuration according to Modification 1, it is possible to improve the detection accuracy of the black (colored) yarn Y, which is difficult to reflect light from the yarn Y wound around the storage roller 41 .

Specifically, for example, when the yarn Y exists on the outer peripheral surface 41d of the storage roller 41, the control unit 25 controls that the light emitted from the light emitting unit 55 is absorbed by the yarn Y and is not reflected toward the line sensor 53A. On the other hand, when the yarn Y does not exist on the outer peripheral surface 41d of the storage roller 41, the light reflected by the outer peripheral surface 41d is reflected toward the line sensor 53A and detected by the line sensor 53A.

The detection result by the line sensor 53A at this time is acquired by the control unit 25 as data as shown in FIG. 11, for example. In the data shown in FIG. 11, the area where relatively much light is detected, that is, the area where a whitish image is obtained when converted to a BMP image indicates the area where no thread (black thread) is detected, and relatively light is detected. A region in which a small amount of is detected, ie, a region in which a blackish image is obtained when converted to a BMP image indicates a region in which threads (black threads) are detected.

(Modification 2)
In Modified Example 1, an example in which the light emitting portion 55 is arranged between the storage roller 41 and the cover 47 has been described. Considering the possibility of the yarn end colliding with the peripheral structure, etc., it is desirable to avoid placing unnecessary objects between the storage roller 41 and the cover 47 as much as possible. Therefore, as shown in FIG. 10B, a slit 47b is provided in the cover 47, and the light from the light emitting unit 55 is made incident on the storage roller 41 through the slit 47b, and is reflected off the outer peripheral surface 41d of the storage roller 41. Light from the light emitting unit 55 may be incident on the line sensor 53A.

(Modification 3)
The above embodiment is a configuration suitable for using a white yarn Y with a relatively high reflectance, and the above modifications 1 and 2 are black (colored) yarns with a relatively low reflectance This configuration is suitable for using the yarn Y of In Modified Example 3, an example of a configuration suitable for a case where it is desired to exchange the white thread Y and the black (colored) thread Y for use will be described. For example, the winder unit 2 according to Modification 3 has the configuration of the above-described embodiment including the white yarn Y detection light emitting portion 552 (55), which is the white yarn Y detection light emitting portion 55, and the black color ( By adding a colored thread Y light emitting portion 551 (55), which is the light emitting portion 55 for detecting the colored thread Y, and the cover 47, a single line sensor 53 detects the white thread Y and the black (colored) thread Y. A configuration may be adopted in which both the yarn Y of the system can be detected. However, with such a configuration, when detecting the white yarn Y, the light emitted from the colored yarn light emitting unit 551 of the above embodiment enters the slit 47b, and the detection result by the line sensor 53 is detected. may adversely affect (cause false positives). Therefore, in Modification 3, as shown in FIG. 12A, a door 48 is provided in the slit 47b, and the door 48 is opened and closed by an actuator (cylinder, solenoid, or the like). The control unit 25 controls the actuator so that the door 48 is opened when black (colored) yarn Y is detected, and the door 48 is closed when white yarn Y is detected.

Further, as described above, whether the door 48 is opened or closed and the yarn detection method (i.e., the detection method for detecting light) depends on whether the white yarn Y is detected or the black (colored) yarn Y is detected. It is necessary to change the judgment that the yarn Y exists when the light is detected and the judgment that the yarn Y exists when no light is detected). In the winder unit 2 according to Modification 3, a mode switching section capable of selectively switching between a white thread detection mode that is a detection mode for white threads and a colored thread detection mode that is a detection mode for colored threads is provided. A control unit is provided. When the white thread detection mode is selected, the control section causes the white thread light emitting section 552 to emit light, determines that the thread Y is present in the portion received by the line sensor 53, and selects the colored thread detection mode. When it is detected, the colored thread light emitting section 551 is caused to emit light, and the line sensor 53 determines that the thread Y is present in a portion where no light is received. The winder unit 2 according to Modification 3 is configured, for example, so that the above-described detection mode can be set via the machine control device 3 (or a device similar to the machine control device 3). By setting, the door state and detection method suitable for detecting white thread Y and the door state and detection method suitable for detecting black (colored) thread Y are switched. be able to.

Instead of the configuration of Modified Example 3 including the slit 47b and the door 48, the end portion of the cover 47 can be expanded and contracted so that the end portion of the cover 47 is contracted when black (colored) yarn Y is detected. , the end portion of the cover 47 may be extended when detecting the white thread Y. Incidentally, instead of the door 48 or the expandable cover 47, the operator may install a screen or the like according to the type of yarn used (black or white).

(Modification 4)
The winder unit 2 according to Modification 4, like the winder unit 2 according to Modification 3, is an example of a configuration suitable for a case where it is desired to exchange the white yarn Y and the black (colored) yarn Y for use. is. The configuration of the winder unit 2 according to Modification 4 is different from the configuration of the winder unit 2 according to Modification 3 because, as shown in FIG. A white thread detection line sensor 532 for detecting light and a colored thread detection line sensor 531 for detecting light emitted by the colored thread light emitting section 551 (55) are provided.

The colored yarn light emitting portion 551 irradiates the outer peripheral surface 41d of the storage roller 41 with light through the slit 47b, and the colored yarn detection line sensor 531 is a colored yarn light emitting portion that reflects the outer peripheral surface 41d of the storage roller 41. It is provided at a position where the light from 551 is incident. In addition, the white thread light emitting section 552 irradiates the outer peripheral surface 41 d of the storage roller 41 with light, and the white thread detection line sensor 532 detects light from the white thread light emitting section 552 that reflects the outer peripheral surface 41 d of the storage roller 41 . It is provided at a position where light does not enter and light from the white yarn light-emitting portion 552 that reflects the yarn Y stored in the storage roller 41 enters.

When using a black (colored) yarn Y and when determining whether or not the yarn Y is stored in the storage roller 41, the controller 25 opens the door 48. FIG. When white yarn Y is used, or when it is not determined whether black (colored) yarn Y is stored in storage roller 41 , controller 25 closes door 48 . Thus, in one winder unit 2, the white yarn Y and the black (colored) yarn Y can be used while being exchanged.

A transparent window may be provided in the slit 47b, and the transmittance of the transparent window in this case can be, for example, 0.4 to 0.6. Note that the transparent window can also be used in Modifications 2 and 3.

(Modification 5)
Modifications 3 and 4 are suitable for a case in which the yarn accumulating device 40 is provided with a cover 47, and the white yarn Y and the black (colored) yarn Y are exchanged for use. Although one example of the configuration has been described, a configuration without the cover 47 is also possible. For example, as shown in FIGS. 13A and 13B, the detection unit 50 including the detection unit 53 and the light emission unit 55 is arranged relative to the storage roller 41. It may be provided movably. The movement of the detection unit 50 here includes at least one of horizontal movement and rotational movement. The detection unit 50 may be configured to be manually movable, or may be configured to be movable by an actuator or the like.

In the winder unit 2 according to Modification Example 4, when black (colored) yarn Y is used, the light emitting portion 55 emits light to the outer peripheral surface 41d of the storage roller 41 as shown in FIG. 13(A). The detection unit 50 is moved to such a position and to a position where the light from the light emitting part 55 reflecting off the outer peripheral surface 41d of the storage roller 41 is incident on the line sensor 53A. When using a white yarn Y, as shown in FIG. The detection unit 50 is placed at a position where the reflected light from the light emitting part 55 does not enter the line sensor 53A and where the light from the light emitting part 55 that reflects the yarn Y stored in the storage roller 41 enters. is moved. In the winder unit 2 according to Modification 4, the white yarn Y and the black (colored) yarn Y can be used interchangeably in one winder unit 2 .

(Other modifications)
In the above-described embodiment and modified example, the example in which the first recessed portion 43a and the second recessed portion 43b are formed in the outer peripheral surface 41d of the storage roller 41 has been described. Alternatively, only one of the first recess 43a and the second recess 43b may be formed. Further, in the above-described embodiment and modified example, the presence or absence of the yarn Y and the presence or absence of the occurrence of sluffing or yarn clumps are determined based on the detection result of the line sensor 53A when the storage roller 41 is rotated by one turn or more. Although the example has been described, the presence or absence of the yarn Y, and the presence or absence of sluffing or a lump of yarn may be determined based on the detection results of the line sensor 53A for a portion of one turn.

Further, the method of detecting the yarn Y may be changed depending on whether the first recess 43 a and the second recess 43 b provided on the outer peripheral surface 41 d of the storage roller 41 are mirror-finished (plated).

For example, when the first concave portion 43a and the second concave portion 43b are mirror-finished (plated), black (colored) yarn Y is detected in the arrangement of the detection unit 50 as shown in FIG. may When detecting a black (colored) yarn Y, it is preferable to use the detection result of the line sensor 53A in a portion where the first concave portion 43a and the second concave portion 43b are absent, but the method is not limited to this. Alternatively, the white thread Y may be detected in the arrangement of the detection unit 50 as shown in FIG. 13(B). When detecting the white yarn Y, it is preferable to use the detection result of the line sensor 53A in the portion without the first recess 43a and the second recess 43b, but it is not limited to this.

For example, if the first concave portion 43a and the second concave portion 43b are not mirror-finished (plated), the white thread Y may be detected in the arrangement of the detection unit 50 as shown in FIG. 13(A). . When detecting the white thread Y, the white thread Y is detected by detecting the first recess 43a and the second recess 43b. Further, the black (colored) yarn Y may be detected in the arrangement of the detection unit 50 as shown in FIG. 13(B). In addition, in the arrangement as shown in FIG. 13B, the white yarn Y may be detected in a portion where the first concave portion 43a and the second concave portion 43b are absent.

In the above embodiments and modifications, an example in which one aspect of the present invention is applied to the automatic winder 1 has been described, but one aspect of the present invention can also be applied to, for example, an air spinning machine.

DESCRIPTION OF SYMBOLS 1... Automatic winder 2... Winder unit 3... Machine control device 6... Yarn supplying section (supplying section) 8... Package forming section (winding section) 21... Yarn supplying bobbin 22... Winding bobbin 25...control section 40...yarn accumulating device 41...accumulating roller 41d...peripheral surface 43a...first concave portion 43b...second concave portion 45...driving motor 47...cover 50...detection unit 53...detection Part 53A Line sensor 53B Lens 55 Light-emitting part 55B Light source 55C Optical waveguide A Storage area Y Thread.

Claims (20)

a supply unit capable of supplying yarn;
a winding unit that winds the yarn supplied from the supply unit to form a package;
It is provided in the middle of the yarn traveling path formed between the supply section and the winding section, and rotates the storage roller so that the yarn delivered from the supply section is spread on the outer peripheral surface of the storage roller. a yarn accumulating device for temporarily accumulating the yarn by winding it around the accumulating area;
a control unit that controls the rotation of the storage roller;
a detection unit that detects the yarn wound around the outer peripheral surface of the storage roller,
The detection section is configured to connect an upstream end side in the running direction of the yarn in the storage area and a downstream end side located downstream in the running direction of the yarn from the upstream end side. A yarn winding machine that is a line sensor that detects the presence or absence of the yarn in a section. 2. The yarn winding machine according to claim 1, wherein the line sensor is arranged such that the extending direction of the straight section is parallel to the extending direction of the rotating shaft of the storage roller. further comprising a light emitting unit that emits light toward the storage roller;
The line sensor receives light reflected by the storage roller or the yarn,
When the line sensor receives the light, the control unit determines that the light is received from either the storage roller or the light reflected by the yarn, and based on the result of the determination, the yarn in the straight section. 3. The yarn winding machine according to claim 1, wherein the presence or absence of the yarn is determined. The light emitting unit has two light sources and an optical waveguide that converts the light emitted from the two light sources into surface light emission and emits the light toward the storage roller,
4. The yarn winding machine according to claim 3, wherein the line sensor receives the light through a lens that reduces incident light. The line sensor is configured so that the light from the light emitting section that reflects the outer peripheral surface of the storage roller does not enter and the light from the light emitting section that reflects the yarn stored in the storage roller enters. 5. The yarn winding machine according to claim 3 or 4, which is provided at a position further comprising a cover facing a part of the outer peripheral surface of the storage roller,
6. The yarn winding machine according to claim 5, wherein the cover is provided in at least a part of the traveling direction of the light from the light emitting section that reflects off the outer peripheral surface of the storage roller. In a plan view seen from the direction in which the rotation axis of the storage roller extends,
When one of the straight lines orthogonal to the rotation axis is virtually set as a first straight line, and one of the straight lines parallel to the first straight line and in contact with the outer peripheral surface of the storage roller is virtually set as a second straight line,
The line sensor is arranged between the first straight line and the second straight line,
The light emitting unit is arranged between the line sensor and the first straight line on the first straight line or in the arrangement direction of the first straight line and the second straight line,
7. The peg according to claim 6, wherein the cover is arranged in a region opposite to the side on which the first straight line is arranged with respect to the second straight line in the arrangement direction of the first straight line and the second straight line. pick-up machine. 8. The yarn winding machine according to claim 6, wherein a portion of said cover on which the light from said light emitting portion is incident is black. The light emitting section has a white thread light emitting section and a colored thread light emitting section,
The line sensor prevents the light from the white yarn light emitting portion reflecting the outer peripheral surface of the storage roller from entering, and prevents the light from the white yarn light emitting portion reflecting the yarn stored in the storage roller. and is provided at a position such that the light from the colored yarn light-emitting portion that reflects the outer peripheral surface of the storage roller is incident. The yarn winding machine according to any one of . a mode switching unit capable of selectively switching between a white thread detection mode that is a detection mode for white threads and a colored thread detection mode that is a detection mode for colored threads;
When the white thread detection mode is selected, the control section causes the white thread light emitting section to emit light, determines that the thread is present in the portion received by the line sensor, and detects the colored thread. 10. The yarn winding machine according to claim 9, wherein when the mode is selected, the colored yarn light-emitting portion is caused to emit light, and the line sensor determines that the yarn exists in a portion where the light is not received. 5. The yarn winding machine according to claim 3, wherein the line sensor is provided at a position such that the light from the light emitting section reflecting off the outer peripheral surface of the storage roller is incident. 2. The control unit rotates at least one round of the storage roller, and determines the presence or absence of the yarn in the storage area based on a detection result by the line sensor when at least one rotation of the storage roller is rotated. 12. The yarn winding machine according to any one of -11. At least one concave portion extending along the rotation axis direction of the storage roller is formed on the outer peripheral surface of the storage roller,
13. The yarn winding machine according to claim 12, wherein the control unit determines that the storage roller has rotated once by detecting that the reference concave portion has rotated once. 14. The yarn winding machine according to claim 13, wherein the controller determines whether or not the yarn exists in the storage area based on a detection result of the line sensor at a position different from the recess. A plurality of recesses are formed along the rotation direction of the storage roller on the outer peripheral surface of the storage roller, and a plurality of connection portions are formed between the recesses adjacent to each other in the rotation direction. is formed and
15. The yarn winding according to claim 13 or 14, wherein the controller determines whether or not the yarn is present in the storage area based on detection results from the line sensor in at least a partial area of each of the plurality of connection parts. machine. The control unit estimates information about the yarn stored in the storage roller based on the amount of the yarn supplied from the supply unit and the amount of the yarn wound by the winding unit, and 16. The yarn winding machine according to any one of claims 1 to 15, wherein it is determined whether or not the yarn is evenly wound around the storage area based on the information about the yarn and the detection result of the line sensor. The winding section winds the yarn delivered from the yarn storage device on the winding bobbin by rotating the winding bobbin to form the package;
17. The yarn winding according to claim 16, wherein the control unit estimates information about the yarn stored in the storage roller based on an average value of differences between the rotation speed of the storage roller and the rotation speed of the winding bobbin. pick-up machine. When the yarn storage amount as information about the yarn is an estimated storage amount, and the yarn storage amount calculated based on the detection result by the line sensor is a detected storage amount,
The controller determines that sluffing occurs in the yarn accumulating device when a difference obtained by subtracting the estimated accumulated amount from the detected accumulated amount becomes larger than a sluffing determination accumulated amount. Item 18. The yarn winding machine according to any one of items 1 to 17. When the movement amount per unit time of the most downstream position of the yarn stored in the storage area becomes larger than the sluffing determination movement amount based on the detection result of the line sensor, the control unit The yarn winding machine according to any one of claims 1 to 18, wherein it is determined that sluffing occurs in the yarn accumulating device. When the yarn storage amount as information about the yarn is an estimated storage amount, and the yarn storage amount calculated based on the detection result by the line sensor is a detected storage amount,
When a difference obtained by subtracting the detected storage amount from the estimated storage amount becomes larger than a yarn mass determination storage amount, it is determined that the yarn mass is generated in the yarn accumulating device. 20. The yarn winding machine according to any one of 19.

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