JP2024095243A - Winding device and textile machine - Google Patents

Abstract

To appropriately capture a yarn end while improving energy efficiency.
[Solution] The winding device 10 includes a yarn supplying unit 15, a winding unit 17, a first catching unit 30, and a control unit 101. The yarn supplying unit 15 supplies the yarn 14. The winding unit 17 rotates a tube 22a in the winding direction to wind the yarn 14 around the tube 22a to form a package 22. The first catching unit 30 has a catching port 33 that sucks in the outer yarn end of the package 22. The control unit 101 controls the winding unit 17 and the first catching unit 30. The control unit 101 controls the suction force generated by the first catching unit 30 based on the diameter and/or shape of the package 22.
[Selected figure] Figure 5

Description

The present invention relates to a winding device that winds yarn to form a package, and to a textile machine equipped with multiple winding devices.

A winding device is known that winds up yarn supplied from a yarn supplying bobbin to form a yarn package. In this winding device, the yarn supplied from the yarn supplying bobbin may have defects. When forming the package, such defects must be removed. This is because the quality of the package decreases if there are defects in the yarn in the package. Yarn defects are removed by cutting the area where the defect exists.

When the yarn defect is removed by cutting, the yarn is cut between the yarn supplying bobbin and the package. Therefore, after removing the yarn defect, the winding device uses a yarn joining device to join the yarn end on the package side and the yarn end on the yarn supplying bobbin side, and resumes winding the yarn onto the package. When joining the yarn using the yarn joining device, the winding device captures and moves the yarn end to guide it to the yarn joining device. The winding device is equipped with a capture unit for capturing and moving the yarn end. The capture unit has an internal space, and captures the yarn end by sucking the yarn end into this internal space (see, for example, Patent Document 1).

Patent Publication 2014-108845

In the above winding device, the yarn end on the package side is captured by bringing the capture opening of the capture unit close to the package and generating suction force in the capture unit. When capturing the yarn end by suction, the ease of capturing the yarn end varies depending on the diameter and/or shape of the package. Therefore, in conventional devices, the suction force is determined based on the case where it is difficult to capture the yarn end, and the suction force is constant regardless of the diameter and/or shape of the package.

Therefore, in conventional devices, the yarn end is captured with a large suction force even when the diameter and/or shape of the current package makes it easy to capture the yarn end. In other words, in conventional devices, the yarn end is captured with a large suction force even when the yarn end can be captured with a smaller suction force. When the yarn end is sucked with excessive suction force, it causes wasteful energy consumption due to the generation of the excessive suction force and inappropriate capture of the yarn end (for example, the phenomenon in which not only the yarn end at the outermost periphery of the package but also the yarn inside it (double end capture)).

The object of the present invention is to improve the energy efficiency of a winding device that winds yarn to form a package, and a textile machine equipped with multiple winding devices, while properly capturing the yarn end.

In the following, several aspects will be described as means for solving the problems. These aspects can be arbitrarily combined as necessary.
A winding device according to one aspect of the present invention includes a yarn supplying unit, a winding unit, a catching unit, and a control unit. The yarn supplying unit supplies the yarn. The winding unit rotates the tube in the winding direction to wind the yarn around the tube to form a package. The catching unit has a catching port that sucks in the yarn end on the outside of the package. The control unit controls the winding unit and the catching unit. The control unit also controls the suction force generated by the catching unit based on the diameter and/or shape of the package.

In the above winding device, the control unit controls the suction force generated in the catching unit based on the diameter and/or shape of the package formed by the winding unit. As a result, for example, when the diameter and/or shape of the package makes it difficult to catch the yarn end on the package side, the control unit generates a large suction force in the catching unit. As a result, the yarn end can be reliably caught from the package side. On the other hand, when the diameter and/or shape of the package makes it easy to catch the yarn end on the package side, the control unit reduces the suction force of the catching unit. As a result, only the yarn end on the package side that is originally intended to be caught can be reliably caught, suppressing inappropriate catching such as double ending, while suppressing wasteful energy consumption caused by generating excessive suction force.

In the above winding device, the control unit may control the position of the capture port relative to the tube when sucking the yarn end based on the diameter and/or shape of the package, and adjust the suction force of the capture unit when a situation occurs in which the position of the capture port moves away from the tube. This makes it possible to adjust the suction force of the capture unit while keeping the distance between the outside of the package and the capture port constant, thereby reducing unnecessary energy consumption.

In the above winding device, the control unit may calculate the position of the capture port and the suction force of the capture unit based on the diameter and/or shape of the package, using a first formula for calculating the position of the capture port relative to the tube with the diameter and/or shape of the package as a variable, and a second formula for calculating the suction force of the capture unit with the diameter and/or shape of the package as a variable. This makes it possible to accurately and easily calculate the position of the capture port relative to the surface of the package and the suction force of the capture unit according to the diameter and/or shape of the package.

The winding device may further include a storage unit. The storage unit stores capture control information. The capture control information includes information on the position of the capture opening relative to the tube, which is set in stages according to the diameter and/or shape of the package, and information on the suction force of the capture unit, which is set in stages according to the diameter and/or shape of the package. In this case, the control unit may control the position of the capture opening relative to the surface of the package and the suction force of the capture unit based on the diameter and/or shape of the package and the capture control information. This makes it easy to control the position of the capture opening relative to the surface of the package and the suction force of the capture unit according to the diameter and/or shape of the package.

The winding device may include a suction source and an opening adjustment unit. The suction source generates a suction force in the capture unit. The opening adjustment unit is provided between the capture unit and the suction source, and has an opening and a shutter. The opening allows gas to flow between the capture unit and the suction source. The shutter adjusts the opening of the opening by moving between a fully open position where the opening is fully open and a fully closed position where the opening is fully closed. In this case, the control unit may control the suction force of the capture unit by controlling the position of the shutter. This allows the opening of the opening to be finely adjusted by moving the shutter, so that the suction force of the capture unit can be accurately adjusted.

In the above winding device, the winding section may have a rotating roller that rotates in contact with the outer periphery of the package to rotate the tube. Even if a rotating roller is present on the outer periphery of the package, the suction force of the capture section can be appropriately set.

In the above winding device, the control unit determines whether the catching unit has succeeded in catching the yarn end, and if it determines that catching the yarn end has failed, it may increase the suction force of the catching unit beyond the suction force at the time when it determined that catching had failed, and may retry catching the yarn end with the catching unit with the increased suction force. This allows the yarn end to be caught more reliably.

The winding device may further include a monitoring device. The monitoring device detects the state of the yarn to detect short defects, which are defects in the yarn, and long defects, which are defects longer than the short defects. In this case, when the monitoring device detects a long defect, the control unit may determine whether the yarn end has been captured by the capture unit, and when it is determined that the yarn end has been captured, the suction force of the capture unit after capturing the yarn end may be reduced to be lower than the suction force when capturing the yarn end. While a large suction force is required to peel the yarn end off the package, if the yarn end can be peeled off from the package and captured by the capture unit, the yarn on the package side of the yarn end can be sucked into the capture unit with a small suction force. Therefore, by reducing the suction force of the capture unit when sucking the yarn on the package side of the yarn end to be lower than the suction force when capturing the tip, it is possible to reliably capture the yarn end while suppressing energy consumption.

A textile machine according to another aspect of the present invention includes a plurality of the above-mentioned winding devices and a management unit. The management unit communicates with the control unit of the winding device and calculates the success rate of capturing the yarn end by the capture unit in the entire plurality of winding devices. In this textile machine, the control unit of each winding device controls the suction force of the capture unit of the winding device based on the success rate calculated by the management unit and the success rate of capturing the yarn end in the winding device. This makes it possible to improve the success rate of capturing the yarn end in the entire plurality of winding devices, even if there is variation in the capture unit in each winding device, while suppressing unnecessary energy consumption of the textile machine caused by generating excessive suction force.

A textile machine according to yet another aspect of the present invention includes a plurality of the above-mentioned winding devices, a suction source, and a management unit. The suction source generates a suction force on the capture units of the plurality of winding devices. The management unit communicates with the control unit and grasps the package formation status of the plurality of winding devices as a whole. In this textile machine, the suction source is common to the plurality of winding devices. The management unit also controls the suction force of the suction source based on the package formation status of the plurality of winding devices as a whole. By controlling the suction force of the suction source common to the plurality of winding devices according to the package formation status, it is possible to reliably capture the yarn ends in the plurality of winding devices while suppressing unnecessary energy consumption of the textile machine caused by the generation of excessive suction force.

In the above-mentioned winding device and textile machine, the winding device can reliably capture the yarn end while suppressing wasteful energy consumption caused by generating excessive suction force. As a result, the energy efficiency of the winding device and textile machine can be improved.

FIG. 1 is a diagram showing a configuration of a textile machine. FIG. FIG. 4 is a diagram showing an example of the configuration of an opening degree adjustment unit. FIG. 4 is a diagram showing a specific configuration of an upper thread sensor. 5 is a flowchart showing a package forming operation in the winding device.

1. First embodiment (1) Textile machine The configuration of the textile machine 1 will be described with reference to Fig. 1. Fig. 1 is a diagram showing the configuration of the textile machine 1. The textile machine 1 includes a plurality of winding devices 10 arranged side by side, a suction source 11, a management device 12, and a doffing device 13. Each winding device 10 unwinds a yarn 14 from a yarn supplying bobbin 16 and forms a package 22 while traversing the yarn 14.

The suction source 11 is, for example, a blower device, a pump, etc., provided in the management device 12. The suction source 11 has a tubular member 11b. The tubular member 11b is connected to the multiple winding devices 10 and provides suction force for sucking the yarn ends to all of the multiple winding devices 10. In other words, the suction source 11 is common to the multiple winding devices 10 and provides suction force for sucking the yarn ends to all of the multiple winding devices 10. The suction source 11 sets the internal space of the tubular member 11b to a negative pressure of, for example, 3.0 kPa. Note that the pressure in the internal space is not limited to 3.0 kPa and can be set to any negative pressure.

The management device 12 is a computer system composed of a CPU, a storage device (RAM, ROM, SSD, hard disk, etc.), and various interfaces. The management device 12 can communicate with the control unit of each winding device 10, and manages multiple winding devices 10. An operator of the textile machine 1 can collectively manage multiple winding devices 10 by appropriately operating the management device 12. In addition, the management device 12 can control the suction force of the suction source 11.

The management device 12 is provided with a display 12a and an input interface 12b. The display 12a displays information related to the settings and/or status of the winding device 10. The display 12a is, for example, a display device such as a liquid crystal display or an organic electroluminescence display.

The input interface 12b accepts operations by the operator. The operator can perform appropriate operations using the input interface 12b to perform setting operations for the winding device 10. Specifically, the operator can use the input interface 12b to set the type of yarn to be wound around the package 22 and the type of package 22 to be formed by multiple winding devices 10 (i.e., the shape of the package 22). The input interface 12b is, for example, an input device such as an input key or a touch panel. The display 12a and the input interface 12b, which is a touch panel, may be integrated together. The shape of the package 22 refers to the appearance of the package 22.

When the package 22 in each winding device 10 becomes full (a specified amount of yarn is wound), the doffing device 13 travels to the position of that winding device 10, removes the full package, and sets an empty tube 22a. The tube 22a becomes the core of the package 22 formed by winding the yarn 14. The tube 22a is, for example, a tubular member made of paper.

(2) Configuration of the Winding Device Next, a detailed configuration of the winding device 10 will be described with reference to Fig. 2. Fig. 2 is a diagram showing the configuration of the winding device 10. The winding device 10 is a traverse drum type winding unit. The winding device 10 mainly includes a yarn supplying section 15, a winding section 17, a first catching section 30, a second catching section 34, a yarn joining device 38, and a control device 100.

The yarn supplying unit 15 supplies the yarn 14 to the winding unit 17 to form the package 22. Specifically, the yarn supplying unit 15 is a conveyor tray type supply mechanism that supports the yarn supplying bobbin 16 placed on a conveyor tray (not shown) at a predetermined position and supplies the yarn supplying bobbin 16 to the predetermined position. The yarn supplying unit 15 is not limited to a conveyor tray type supply mechanism and may be, for example, a magazine type supply mechanism. The yarn 14 is pulled out from the yarn supplying bobbin 16 supported by the yarn supplying unit 15 by the winding unit 17. The pulled out yarn 14 is wound into the package 22 by the winding unit 17.

The winding unit 17 forms a package 22 using the yarn 14 supplied from the yarn supply unit 15. The winding unit 17 has a cradle 18 and a rotating roller 20. The cradle 18 supports the tube 22a rotatably around a predetermined axis by clamping the tube 22a at both ends in the longitudinal direction with a pair of rotation support parts (not shown). The cradle 18 is switchable between a state in which the package 22 formed on the supported tube 22a is in contact with the rotating roller 20 and a state in which the package 22 is separated from the rotating roller 20.

The rotating roller 20 is a cylindrical member that is rotated around its axis by the roller drive motor 21. By rotating the rotating roller 20 while it is in contact with the outer periphery of the tube 22a or the package 22, the tube 22a (package 22) rotates around the above-mentioned specified axis in accordance with the rotation of the rotating roller 20.

A spiral traverse groove (traverse mechanism) is formed on the cylindrical side of the rotating roller 20. While the rotating roller 20 is driven to rotate, the tube 22a (package 22) is rotated, and at the same time, the yarn 14 unwound from the yarn supplying bobbin 16 is traversed at a constant width on the surface of the tube 22a or package 22 by the traverse groove. As a result, the yarn 14 unwound and supplied from the yarn supplying bobbin 16 is wound while traversing on the surface of the tube 22a or package 22. As a result, the package 22 is formed.

The first capture unit 30 is disposed above the monitoring device 40 in the yarn travel path, and is a device that captures the outer yarn end of the package 22 by negative pressure suction when the yarn 14 is cut. The first capture unit 30 has a shaft portion 31, a pipe portion (tube portion) 32, and a capture port 33. The pipe portion 32 and the capture port 33 are rotatable (movable) around the shaft portion 31 as the center of rotation from a standby position on the yarn supply unit 15 side (solid line in FIG. 2) to a capture position on the winding unit 17 side (dotted line in FIG. 2).

The pipe section 32 and the capture port 33 of the first capture section 30 may be fixed in a state where the capture port 33 is positioned at a position where the rotating roller 20 and the package 22 are in contact.

When in the capture position, the first capture section 30 captures the yarn end on the package 22 side by sucking it into the pipe section 32 using the suction flow generated at the capture port 33. After capturing the yarn end, the first capture section 30 returns to the standby position, thereby guiding the yarn 14 on the package 22 side to the yarn joining device 38.

The suction source 11 is connected to the first capture unit 30 on the shaft 31 side of the pipe 32 via the aperture adjustment unit 11a. This allows the suction source 11 to generate a suction flow by negative pressure at the capture port 33. The aperture adjustment unit 11a adjusts the flow rate of the suction flow at the capture port 33 by the suction source 11, thereby adjusting the suction force of the capture port 33. Specifically, as shown in FIG. 3, the aperture adjustment unit 11a has an opening 111 and a shutter 113. FIG. 3 is a diagram showing an example of the configuration of the aperture adjustment unit 11a.

One end of the opening 111 (e.g., the opening 111 on the left side in FIG. 3) is connected to the suction source 11, and the other end (e.g., the opening 111 on the right side in FIG. 3) is connected to the shaft portion 31 side of the pipe portion 32. As a result, the opening 111 allows gas to flow between the first capture portion 30 and the suction source 11, for example, in the direction indicated by the arrow drawn to pass through the opening 111 in FIG. 3. The gas flow direction may be opposite to the direction indicated by the arrow passing through the opening 111 in FIG. 3. That is, the suction source 11 may be connected to the opening 111 on the right side in FIG. 3. The shutter 113 is driven by the motor 115 to move between a fully open position where the opening 111 is fully opened and a fully closed position where the opening 111 is fully closed, thereby adjusting the opening degree (opening area) of the opening 111.

As described above, in this embodiment, the suction source 11 is common to the multiple winding devices 10, while the first capture unit 30 of each winding device 10 is provided with the above-mentioned opening adjustment unit 11a. This has the following advantages. First, the suction force of the first capture unit 30 can be adjusted independently of the other capture units (the second capture unit 34, the capture units of the other winding devices 10). For example, the suction force of the first capture unit 30 can be adjusted by providing the suction source 11 to each winding device 10, but in this case, the suction force of the second capture unit 34 is also affected. That is, the suction force of the second capture unit 34 may be changed unintentionally. In addition, the suction force of the suction source 11 common to the multiple winding devices 10 can be adjusted, but in this case, the effect occurs in all of the multiple winding devices 10. That is, in this case, the suction force of the capture units in the other winding devices 10 may be changed unintentionally.

In addition, the response speed when the suction source 11 is changed to the desired suction force (pressure) is faster than the response speed when the shutter 113 of the opening adjustment unit 11a is moved to set the opening 111 to the desired opening. Therefore, adjusting the opening of the opening adjustment unit 11a to adjust the suction force provides better response to changing the suction force than changing the suction force of the suction source 11.

Returning to the explanation of the first catching section 30, an upper thread sensor 60 is provided near the wall of the first catching section 30 (near the wall of the pipe section 32) at the position of the first catching section 30 when it catches the yarn end on the package 22 side. The upper thread sensor 60 detects whether the first catching section 30 has successfully caught the yarn end. The configuration of the upper thread sensor 60 will be explained using Figure 4. Figure 4 is a diagram showing the specific configuration of the upper thread sensor 60.

The upper thread sensor 60 has a case 601, a light-emitting unit 602, and a light-receiving unit 603. The case 601 is supported on the winding unit 17 by a support member 604. The case 601 supports the light-emitting unit 602 and the light-receiving unit 603. The light-emitting unit 602 is composed of a light-emitting element such as a light-emitting diode. The light-emitting unit 602 irradiates light into the inside of the pipe unit 32. If a thread end is present inside the pipe unit 32, the light irradiated by the light-emitting unit 602 is reflected by the thread end.

The light receiving unit 603 is composed of a light receiving element such as a photodiode. The light receiving unit 603 receives light reflected by the yarn end and outputs an electrical signal of current or voltage according to the amount of light. In this upper yarn sensor 60, it is possible to determine whether the first capturing unit 30 has successfully captured the yarn end on the package 22 side based on whether the light receiving unit 603 has detected light from the light projecting unit 602.

The second capture unit 34 is disposed between the tensioning device 27 and the yarn joining device 38. The second capture unit 34 has an axis 35, a pipe 36, and a capture port 37, similar to the first capture unit 30 described above. The capture port 37 can rotate around the axis 35 as the center of rotation, similar to the capture port 33 of the first capture unit 30, and can generate a suction flow by negative pressure suction. At the capture position on the yarn supplying unit 15 side, the second capture unit 34 sucks and captures the yarn end on the yarn supplying unit 15 side into the pipe 36 by the suction flow generated at the capture port 37. After capturing the yarn end, the second capture unit 34 returns to the standby position, thereby leading the yarn 14 on the yarn supplying unit 15 side to the yarn joining device 38.

In addition, like the first capture unit 30, the second capture unit 34 also has a suction source 11 connected to the shaft 35 side of the pipe unit 36. In addition, the second capture unit 34 may also be provided with a device capable of adjusting the suction flow rate, such as an opening adjustment unit having a configuration similar to that provided in the first capture unit 30, between the suction source 11 and the pipe unit 36.

For example, if the monitoring device 40 detects a defect in a short period of time, there may be a problem with the yarn supplying bobbin 16. In this case, a longer yarn is removed from the yarn supplying bobbin 16, but if the yarn 14 is sucked in by the suction force of the suction source 11, it takes time to suck in the yarn 14. Therefore, the second capture unit 34 is also provided with an opening adjustment unit having a shutter that adjusts the opening of the opening, and by increasing the opening of the opening and increasing the suction force of the second capture unit 34, the yarn 14 can be removed in a short time.

The yarn joining device 38 is disposed immediately after (above) the tensioning device 27 in the yarn travel path. When the yarn 14 is cut between the yarn supplying section 15 and the winding section 17 (package 22) for some reason, the yarn joining device 38 joins the yarn 14 on the yarn supplying section 15 side captured and guided by the second capturing section 34 with the yarn 14 on the package 22 side captured and guided by the first capturing section 30. The yarn joining device 38 is, for example, a splicer device that twists the yarn ends together using a swirling air flow generated by compressed air.

The control device 100 is, for example, a computer system equipped with a CPU, a storage device (ROM, RAM, SSD, hard disk, etc.), and various interfaces. The control device 100 has a control unit 101 and a storage unit 103. The control unit 101 is an information processing part of the control device 100, such as the CPU, and executes various information processing related to the control of the winding device 10. Note that the various information processing executed by the control unit 101 may be realized by a program stored in the storage device (storage unit 103) of the control device 100 and executable by the control unit 101.

The memory unit 103 is a part or all of the memory area of the storage device of the control device 100, and stores the programs executed by the control unit 101, various parameters related to the control of the winding device 10, information, etc.

The control unit 101 transmits a drive signal to the roller drive control device 21a to control the rotation drive of the roller drive motor 21. As a result, the control unit 101 controls the rotation of the rotating roller 20 to form the package 22 by winding the yarn 14 around the package 22 (tube 22a) while traversing it. The control unit 101 adjusts the rotation speed of the rotating roller 20 so that the winding speed of the yarn 14 around the package 22 is constant. In addition, the rotation speed of the rotating roller 20 may be adjustable according to the diameter of the package 22 to rotate the package 22 at a desired speed.

When splicing the yarn 14, the control unit 101 grasps the diameter and/or shape of the package 22 being formed. The control unit 101 calculates the diameter (diameter/radius) of the package 22 based on the ratio between the amount of rotation of the rotating roller 20 from the point when winding of the yarn 14 onto the tube 22a is started and the amount of rotation of the tube 22a (package 22) which rotates due to the rotation of the rotating roller 20. For example, if the rotating roller 20 rotates m times (m: any positive number) when the tube 22a (package 22) rotates once, it can be calculated that the diameter of the package 22 is m times the diameter of the rotating roller 20. For this reason, the rotating roller 20 and the cradle 18 are provided with sensors (e.g., encoders) (not shown) that measure the amount of rotation of the rotating roller 20 and the amount of rotation of the tube 22a, respectively.

Furthermore, the control unit 101 can also calculate the diameter of the package 22 based on the amount of yarn 14 wound onto the tube 22a (package 22) from the rotating roller 20. The amount of wound yarn 14 can be calculated based on, for example, the amount of rotation of the rotating roller 20.

On the other hand, the shape of the package 22 formed by the winding device 10 can be set, for example, by the user operating the management device 12. Information regarding the shape of the package 22 to be formed is, for example, transmitted from the management device 12 to the control device 100 and stored in the memory unit 103. That is, the control unit 101 can determine the shape of the package 22 to be formed by the winding device 10 from the information regarding the shape of the package 22 stored in the memory unit 103. Alternatively, the control unit 101 may obtain information regarding the shape of the package 22 directly from the management device 12.

The diameter and/or shape of the package 22 can also be determined by, for example, measuring the dimensions of the package 22 using a sensor (e.g., a distance sensor) not shown. Specifically, for example, the dimensions of the package 22 can be measured by providing a distance sensor near the capture port 33 of the first capture unit 30.

The control unit 101 controls the suction force generated in the first catching unit 30 (catching port 33) based on the diameter and/or shape of the package 22 grasped as described above. The inventor has found that the optimal suction force of the first catching unit 30 for properly catching the yarn end on the package 22 side varies depending on the diameter and/or shape of the package 22. Specifically, it has been found that when the diameter of the package 22 is large, it is better to make the necessary suction force smaller than when the diameter of the package 22 is small. This is for the following reasons.

When the diameter of the package 22 is small, the gas around the package 22 is sucked in, so in order to capture the yarn end, it is necessary to generate a large suction force in the first capture unit 30, taking into account the suction of this gas. On the other hand, when the diameter of the package 22 is large, the suction of the gas around the package 22 is suppressed, so there is no need to take the suction of the gas into consideration, and there is no need to generate a large suction force in the first capture unit 30. In addition, if a large suction force is generated when the diameter of the package 22 is large, there are cases where the yarn 14 other than the yarn end that is originally intended to be captured (the yarn end at the outermost periphery of the package 22) is also captured.

The shape of the package 22 may be, for example, a cylindrical shape or a truncated cone shape. When the package 22 is cylindrical, the surface of the package 22 and the capture port 33 can be made parallel, so the suction force of the yarn end hardly changes depending on the position of the package 22. As a result, no large suction force is required. On the other hand, when the package 22 is shaped like a truncated cone, the surface of the package 22 and the capture port 33 cannot be made parallel, so the suction force of the yarn end changes depending on the position of the package 22. Therefore, in order to reliably capture the yarn end even when the surface of the package 22 and the capture port 33 are at the farthest position, it is necessary to generate a larger suction force at the capture port 33 than in the case of a cylindrical shape.

Based on the above findings, when the diameter of the package 22 is large, the control unit 101 moves the position of the shutter 113 to a position where the opening 111 is smaller, thereby reducing the suction flow rate of the first capture unit 30 (capture port 33). On the other hand, when the diameter of the package 22 is small, the control unit 101 moves the position of the shutter 113 to a position where the opening 111 is larger, thereby increasing the suction flow rate of the first capture unit 30 (capture port 33). In addition, when the shape of the package 22 is a truncated cone, the control unit 101 increases the suction flow rate of the first capture unit 30 (capture port 33) compared to the suction flow rate when the shape of the package 22 is a cone.

The control unit 101 also controls the position of the capture opening 33 of the first capture unit 30 relative to the tube 22a when capturing the yarn end on the package 22 side, based on the determined diameter and/or shape of the package 22. Specifically, the control unit 101 controls the position of the capture opening 33 so that the distance between the surface of the package 22 and the capture opening 33 is constant. More specifically, when the diameter of the package 22 is large, the control unit 101 positions the capture opening 33 at a position farther away from the tube 22a. On the other hand, when the diameter of the package 22 is small, the control unit 101 positions the capture opening 33 closer to the tube 22a.

In this case, the control unit 101 adjusts the position of the capture port 33 relative to the tube 22a and the suction force of the capture port 33. Specifically, when a situation occurs in which the position of the capture port 33 moves away from the tube 22a, the suction force of the first capture unit 30 is adjusted. More specifically, when the diameter of the package 22 increases and the position of the capture port 33 moves away from the tube 22a, the suction force of the first capture unit 30 becomes even smaller. This is because, as described above, for example, when the diameter of the package 22 increases, the position of the capture port 33 moves away from the tube 22a, and when the diameter of the package 22 increases further, the suction force of the capture port 33 becomes smaller.

Based on the diameter and/or shape of the package 22, the control unit 101 can calculate the position of the capture opening 33 using a first formula that expresses the position of the capture opening 33 relative to the tube 22a with the diameter and/or shape of the package 22 as a variable. The control unit 101 can also calculate the suction force of the first capture unit 30 (capture opening 33) using a second formula that expresses the suction force of the first capture unit 30 (capture opening 33) with the diameter and/or shape of the package 22 as a variable. This makes it possible to accurately and easily calculate the position of the capture opening 33 relative to the surface of the package 22 and the suction force of the first capture unit 30 according to the diameter and/or shape of the package 22.

The control unit 101 may also calculate the position of the capture opening 33 using the above first formula, and calculate the suction force of the capture opening 33 from the position of the capture opening 33 calculated using the first formula. Conversely, the control unit 101 may calculate the suction force of the capture opening 33 using the above second formula, and calculate the position of the capture opening 33 from the suction force of the capture opening 33 calculated using the second formula.

As another example, the first capture unit 30 can be provided with a sensor that measures the distance between the capture opening 33 and the surface of the package 22, and the first capture unit 30 can be moved and stopped so that the distance between the surface of the package 22 and the capture opening 33 remains constant. The diameter of the package 22 (or the amount of change in the diameter) can be calculated from the amount of movement of the first capture unit 30 at this time, and the suction force of the capture opening 33 (or the amount of change in the diameter) can be calculated from the diameter of the package 22.

The control unit 101 may also calculate the position of the capture opening 33 from the amount of movement of the first capture unit 30, and calculate the suction force of the capture opening 33 from the calculated position of the capture opening 33. Conversely, the control unit 101 may calculate the suction force of the capture opening 33, and calculate the position of the capture opening 33 from the calculated suction force of the capture opening 33.

As yet another example, the control unit 101 can gradually adjust the position of the capture port 33 relative to the tube 22a and/or the suction force of the first capture unit 30 according to the diameter and/or shape of the package 22 in accordance with the capture control information CI stored in the memory unit 103. The capture control information CI is information that associates and records the diameters and/or shapes of multiple types of packages 22 with information regarding the position of the capture port 33 relative to the tube 22a for each diameter and/or shape of the package 22. Furthermore, the capture control information CI is information that associates and records the diameters and/or shapes of multiple types of packages 22 with information regarding the suction force of the first capture unit 30 for each diameter and/or shape of the package 22 (which may be information regarding the opening degree of the opening 111 of the opening degree adjustment unit 11a, or information regarding the position of the shutter 113).

Alternatively, the capture control information CI may be information that records the diameter and/or shape of the package 22, the position of the capture port 33 relative to the tube 22a, and the suction force of the capture port 33 in association with each other. In this case, the position of the capture port 33 can be determined from the suction force of the capture port 33. Alternatively, the suction force of the capture port 33 can be determined from the position of the capture port 33.

In this way, by controlling the position and suction force of the capture port 33 in accordance with the above capture control information CI (i.e., adjusting the position of the shutter 113 to adjust the opening degree of the opening 111), the control unit 101 can determine an appropriate position and suction force of the capture port 33 according to the diameter and/or shape of the identified package 22 by simply referring to the capture control information CI.

The winding device 10 further includes an unwinding assist device 25, a tension applying device 27, and a monitoring device 40.

The unwinding assist device 25 is disposed immediately after (downstream of) the yarn supplying section 15 in the yarn travel path from the yarn supplying section 15 to the winding section 17. The unwinding assist device 25 includes a regulating member 26 that can cover the core tube of the yarn supplying bobbin 16. The regulating member 26 is substantially cylindrical and disposed so as to come into contact with a balloon formed on the upper part of the yarn layer of the yarn supplying bobbin 16. The balloon is the part of the yarn 14 that is unwound from the yarn supplying bobbin 16 that is swung around by centrifugal force. By bringing the regulating member 26 into contact with the balloon, the yarn 14 in the balloon part is contacted, preventing the yarn 14 from being swung around excessively. This allows the yarn 14 to be properly unwound from the yarn supplying bobbin 16.

The tensioning device 27 is disposed immediately after (downstream of) the unwinding assist device 25 in the yarn travel path. The tensioning device 27 applies a predetermined tension to the traveling yarn 14. For example, the tensioning device 27 can be configured as a gate type device in which movable comb teeth are arranged relative to fixed comb teeth. The movable comb teeth are biased so that the comb teeth are in an interlocking state. By passing the yarn 14 while bending it between the interlocking comb teeth, an appropriate tension can be applied to the yarn 14, improving the quality of the package 22.

The monitoring device 40 is disposed immediately after (downstream of) the yarn joining device 38 in the yarn travel path. The monitoring device 40 monitors the state of the yarn 14 traveling in the yarn path to detect yarn defects. Specifically, the monitoring device 40 has a slit in the yarn travel path of the yarn 14 through which the yarn 14 passes, and monitors the yarn 14 passing through the slit with an optical sensor (not shown). The monitoring device 40 detects whether the amount of light detected by the optical sensor is greater than or less than a predetermined range, and measures the time during which the amount of light detected by the optical sensor deviates from the predetermined range.

When the amount of light detected by the optical sensor is greater than the predetermined range, it corresponds to the thickness of the thread 14 being thinner than the reference thickness. When it is too small, it corresponds to the thickness of the thread 14 being thicker than the reference thickness. Furthermore, the time during which the amount of light deviates from the predetermined range corresponds to the length (defect length) of the thread defect (the state in which the thickness of the thread 14 deviates from the reference thickness). Based on this information obtained from the monitoring device 40, the control unit 101 can recognize the occurrence of a short thread defect (short defect) and a long defect whose defect length is longer than that of a short defect.

A short defect is, for example, a state in which the thickness of the thread 14 is 1.5 times or more the standard thickness and continues for 2 cm. On the other hand, a long defect is, for example, a state in which the thickness of the thread 14 is 1.1 to 1.4 times or 0.7 to 0.9 times the standard thickness and continues for 10 cm. Which thread defects are considered to be short defects or long defects can be appropriately determined according to predetermined criteria.

Using the above principle, the monitoring device 40 can also detect thread breakage that has occurred in the thread 14, i.e., the presence or absence of the thread 14 in the thread travel path.

A cutter 41 for cutting the yarn 14 is provided near the monitoring device 40. The cutter 41 is operated by the monitoring device 40. Specifically, when a yarn defect is detected by the monitoring device 40, the cutter 41 cuts the yarn 14.

When the monitoring device 40 detects a yarn defect or a broken yarn, the control unit 101 of the control device 100 causes the first capturing unit 30 to capture the yarn end on the package 22 side and guide the yarn 14 on the package 22 side to the yarn joining device 38. Meanwhile, the control unit 101 causes the second capturing unit 34 to capture the yarn end on the yarn supply unit 15 side and guide the yarn 14 on the yarn supply unit 15 side to the yarn joining device 38. The control unit 101 then commands the yarn joining device 38 to join the guided yarn 14. This allows the cut yarn 14 to be joined.

When performing the above-mentioned yarn joining operation, the control unit 101 judges whether the current suction force of the first capture unit 30 has succeeded in capturing the yarn end on the package 22 side. When the light receiving unit 603 of the upper yarn sensor 60 detects light from the light projecting unit 602 during the yarn joining operation, the control unit 101 judges that the yarn end has been captured inside the pipe unit 32, i.e., that the yarn end has been successfully captured. The control unit 101 collects performance data on the success/failure of capturing the yarn end and stores it in the memory unit 103. In addition, the success rate of capturing the yarn end in the winding device 10 is calculated from the performance data on the success/failure of capturing the yarn end.

If the light receiving unit 603 does not detect light during the yarn joining operation and it is determined that the yarn end has not been caught, the control unit 101 increases the suction force of the first catching unit 30 to be greater than the suction force at the time of the failed catching, and the first catching unit 30 with the increased suction force tries to catch the yarn end again. This makes it possible to catch the yarn end on the package 22 side more reliably.

As another example, the control unit 101 can use the monitoring device 40 to determine whether the yarn end has been successfully captured. Specifically, for example, if the first capturing unit 30 performs suction for a predetermined time, and then the yarn 14 is guided to the yarn joining device 38 but the monitoring device 40 does not detect the yarn 14, it can determine that the yarn end has not been captured.

(3) Textile machine operation

(3-1) Package Forming Operation in Each Winding Device The package forming operation in each winding device 10 will be described with reference to FIG. 5. FIG. 5 is a flowchart showing the operation of forming the package 22 in each winding device 10. The operation of forming the package 22 described below is performed independently in each winding device 10. Furthermore, the operation of forming the package 22 described below is the operation performed when forming one package 22. Therefore, the following operation of forming the package 22 is repeatedly performed in each winding device 10, thereby forming multiple packages 22 in each winding device 10.

First, in a state in which the outer periphery of the rotating roller 20 and the outer periphery of the package 22 (tube 22a) are in contact with each other, the control unit 101 of the control device 100 outputs to the roller drive control device 21a a drive signal for rotating the package 22 (tube 22a) in the winding direction of the yarn 14 (step S1). As a result, the yarn 14 supplied from the yarn supplying unit 15 is traversed by the rotating roller 20 and wound onto the package 22 (tube 22a).

While the yarn 14 is being wound, the control unit 101 monitors the results of monitoring of the state of the yarn 14 by the monitoring device 40, and determines whether a yarn defect or yarn breakage has occurred in the yarn 14 along the yarn travel path from the yarn supply unit 15 to the winding unit 17 (step S2). If it is determined that no yarn defect or yarn breakage has occurred (if "No" in step S2), the control unit 101 determines whether the formation of the specified package 22 has been completed (step S3).

If the formation of the package 22 has not been completed (if "No" in step S3), the control unit 101 continues to rotate the rotating roller 20 and continues the formation of the package 22. On the other hand, if the formation of the package 22 has been completed (if "Yes" in step S3), the control unit 101 stops the rotation of the rotating roller 20 and ends the formation of the package 22.

If a yarn defect or breakage occurs while winding the yarn 14 (if "Yes" in step S2), the control unit 101 captures the yarn end using the first capture unit 30 and the second capture unit 34. Specifically, the following operations are performed. Note that the suction source 11 is in operation.

First, the control unit 101 moves the second capturing unit 34 to a capturing position for the yarn end on the yarn supplying unit 15 side, and causes the second capturing unit 34 to capture the yarn end on the yarn supplying unit 15 side. Then, after the yarn 14 on the package 22 side is guided to the yarn joining device 38 by the first capturing unit 30 described below, the second capturing unit 34, which has captured the yarn end on the yarn supplying unit 15 side, is moved from the capturing position to a standby position, and the yarn 14 on the yarn supplying unit 15 side is guided to the yarn joining device 38.

The yarn end is captured by the first capturing unit 30 as follows. First, the control unit 101 determines the shape of the package 22 currently being formed and the current diameter of the package 22 (step S4). After determining the diameter and shape of the package 22, the control unit 101 moves the first capturing unit 30 to a capturing position on the winding unit 17 side. Then, the control unit 101 determines the suction force of the first capturing unit 30 and the position of the capturing opening 33 of the first capturing unit 30 based on the determined diameter and shape of the package 22 (step S5).

Specifically, when the diameter of the package 22 is relatively large, the control unit 101 determines to move the position of the shutter 113 of the opening adjustment unit 11a in a direction that reduces the opening of the opening 111, thereby reducing the suction flow rate of the first capture unit 30 by the suction source 11. In other words, it determines to reduce the suction force of the first capture unit 30. On the other hand, when the diameter of the package 22 is relatively small, the control unit 101 determines to move the position of the shutter 113 in a direction that increases the opening of the opening 111, thereby increasing the suction flow rate of the first capture unit 30 by the suction source 11. In other words, it determines to increase the suction force of the first capture unit 30.

After determining the suction force (opening degree of opening 111) of the first capture unit 30 based on the diameter of the package 22, the control unit 101 corrects the suction force (opening degree of opening 111) determined based on the diameter of the package 22 based on the shape of the package 22. Specifically, when the shape of the package 22 is a truncated cone shape or a shape close to it (i.e., the surface of the package 22 is not parallel to the capture opening 33), the control unit 101 makes the suction force of the first capture unit 30 larger than the suction force determined based on the diameter of the package 22. On the other hand, when the shape of the package 22 is a cylindrical shape or a shape close to it (i.e., the surface of the package 22 is parallel to the capture opening 33 or a shape close to it), the control unit 101 maintains the suction force of the first capture unit 30 calculated based on the diameter of the package 22.

In the above, the suction force of the first catching part 30 is determined based on the diameter of the package 22, and then the suction force of the first catching part 30 is determined based on the shape of the package 22, but this is not limited to the above. Conversely, the suction force of the first catching part 30 may be determined based on the shape of the package 22, and then the suction force of the first catching part 30 may be determined based on the diameter of the package 22.

In addition, when the diameter of the package 22 is relatively large, the control unit 101 positions the capture port 33 of the first capture unit 30 at a position farther away from the tube 22a. On the other hand, when the diameter of the package 22 is relatively small, the control unit 101 positions the capture port 33 closer to the tube 22a. When the shape of the package 22 is cylindrical or a shape similar to that, the control unit 101 positions the capture port 33 at a position farther away from the tube 22a. On the other hand, when the shape of the package 22 is a truncated cone or a shape similar to that, the control unit 101 positions the capture port 33 closer to the tube 22a.

During the process of capturing the yarn end, the control unit 101 determines whether or not the capture of the yarn end has been successful (step S6). Specifically, the control unit 101 can determine that the capture of the yarn end has been successful when the upper yarn sensor 60 detects the yarn end.

If the upper yarn sensor 60 does not detect the yarn end and it is determined that the capture of the yarn end on the package 22 side has failed (if "No" in step S6), the control unit 101 stops the rotation of the package 22 and the capture of the yarn end by the first capture unit 30, and then increases the suction force of the first capture unit 30 to a value greater than the suction force when it is determined that the capture has failed, and resumes the rotation of the package 22 and the capture of the yarn end by the first capture unit 30 (step S7). This allows a yarn end that is difficult to capture to be captured more reliably. Note that after performing the capture operation for a predetermined period of time, it may be determined that the capture has failed, and the suction force may be increased to a value greater than the suction force when the capture of the yarn end by the first capture unit 30 is not stopped.

On the other hand, if the upper yarn sensor 60 detects the yarn end and it is determined that the yarn end on the package 22 side has been successfully captured (if "Yes" in step S6), the monitoring device 40 determines whether a long defect has been detected as a yarn defect (step S7).

When a long defect is detected as a yarn defect, the long yarn 14 is sucked into the first catching section 30. The inventors have found that while a large suction force is required to peel the yarn end off the package 22, if the yarn end can be peeled off from the package 22 and captured by the first catching section 30, the yarn 14 on the package 22 side of the yarn end can be sucked into the first catching section 30 with a small suction force.

Based on the above findings, when a long defect is detected by the monitoring device 40, the control unit 101 determines whether the yarn end has been captured by the first capturing unit 30, and if it determines that the yarn end has been captured, it reduces the suction force of the first capturing unit 30 to less than the suction force used to capture the yarn end.

Specifically, when a long defect is detected by the monitoring device 40 ("Yes" in step S7), the control unit 101 reduces the opening of the opening 111 to reduce the suction force of the first capturing unit 30 after the yarn end on the package 22 side is captured by the first capturing unit 30 (the yarn end is detected by the upper yarn sensor 60), and sucks in the yarn 14 on the package 22 side from the yarn end (step S9). In this way, after capturing the yarn end, the suction force of the first capturing unit 30 is reduced to suck in the yarn 14 on the package 22 side from the yarn end, thereby ensuring capture of the yarn end while reducing energy consumption. Note that when a short defect is detected by the monitoring device 40 ("No" in step S7), the suction force of the first capturing unit 30 is maintained as it is.

As described above, even if the suction force of the first capture unit 30 is reduced to some extent when the yarn 14 is sucked in, the suction efficiency of the yarn 14 is not affected. This is because the time required to suck in the yarn 14 depends not on the suction force, but on the time it takes to rotate the package 22 in the opposite direction to that used for winding and to unwind the required length of the yarn 14.

After capturing the yarn end (and further suctioning the yarn 14 as necessary), the control unit 101 executes a yarn splicing between the yarn 14 on the package 22 side and the yarn 14 on the yarn supply unit 15 side (step S10). Specifically, the control unit 101 moves the first capturing unit 30, which has captured the yarn end on the package 22 side, from the capturing position to the standby position, and guides the yarn 14 on the package 22 side to the yarn splicing device 38. The control unit 101 then causes the yarn splicing device 38 to splice the yarn 14 on the package 22 side and the yarn 14 on the yarn supply unit 15 side.

After performing the yarn splicing, the control unit 101 resumes winding the yarn 14 onto the package 22 (tube 22a) (i.e., the package 22 formation operation returns to step S1).

In this way, in the winding device 10 described above, the control unit 101 grasps the diameter and/or shape of the package 22 formed by the winding unit 17, and controls the suction force generated by the first catching unit 30 based on the grasped diameter and/or shape of the package 22. As a result, for example, when the grasped diameter and/or shape of the package 22 is in a state in which it is difficult to catch the yarn end on the package side (for example, when the diameter of the package 22 is small and/or when the shape of the package 22 is not cylindrical), the control unit 101 causes the first catching unit 30 to generate a large suction force. As a result, the yarn end can be reliably caught from the package 22 side.

On the other hand, if the diameter and/or shape of the identified package 22 is in a state that makes it easy to capture the yarn end on the package 22 side (for example, when the diameter of the package 22 is large and/or the shape of the package 22 is cylindrical or nearly cylindrical), the control unit 101 reduces the suction force of the first capturing unit 30. As a result, only the yarn end on the package 22 side that is to be captured is reliably captured, suppressing inappropriate capture such as double-ended yarn, while suppressing unnecessary energy consumption caused by generating excessive suction force.

(3-2) Overall Operation of the Textile Machine Below, we will explain the overall operation of the textile machine 1. In a textile machine 1 that has a plurality of winding devices 10, a user operates the management device 12 to set the shape of the package 22 to be formed by each winding device 10, and then each winding device 10 forms the package 22.

While each winding device 10 is forming a package 22, the management device 12 receives the formation status of the package 22 in each winding device 10 from the control device 100 of each winding device 10. The formation status of the package 22 is, for example, information indicating whether a large package or a small package is formed in the winding device 10. The management device 12 manages the formation status of the package 22 in multiple winding devices 10 and determines whether the multiple winding devices 10 tend to form large packages or small packages.

The management device 12 controls the suction force of the suction source 11 based on the formation status of the packages 22 in the entire plurality of winding devices 10. Specifically, the management device 12 reduces the suction force of the suction source 11 when there is a tendency for large packages to be formed in the entire plurality of winding devices 10, and increases the suction force of the suction source 11 when there is a tendency for small packages to be formed. When the suction force of the suction source 11 is changed, the opening degree of the opening 111 is corrected in each winding device 10 so that the suction force of the first capture section 30 becomes the suction force determined based on the diameter and/or shape of the packages 22 in each winding device 10.

In this way, by controlling the suction force of the suction source 11 common to multiple winding devices 10 according to the formation status of the package 22, it is possible to reliably capture the yarn ends in multiple winding devices 10 while suppressing unnecessary energy consumption in the textile machine 1 caused by the generation of excessive suction force.

The management device 12 also calculates the success rate of capturing the yarn end across all of the multiple winding devices 10 and transmits this to the control devices 100 of the multiple winding devices 10. Specifically, the management device 12 obtains performance data on the success/failure of capturing the yarn end from the control devices 100 of each winding device 10, and calculates the success rate of capturing the yarn end across all of the multiple winding devices 10 from the performance data.

The control unit 101 of each winding device 10 controls the suction force of the first capture unit 30 based on the success rate of capturing the yarn end across all of the multiple winding devices 10 received from the management device 12 and the success rate of capturing the yarn end in the winding device 10 controlled by the control unit 101.

Specifically, when the success rate of capturing the yarn end in the winding device 10 controlled by the control unit 101 is lower than the overall success rate, the control unit 101 increases the suction force of the first capture unit 30 of the winding device 10 to be greater than the suction force of the first capture unit 30 determined based on the diameter and/or shape of the package 22 being formed by the winding device 10. On the other hand, when the success rate of capturing the yarn end in the winding device 10 controlled by the control unit 101 is higher than the overall success rate, the control unit 101 decreases the suction force of the first capture unit 30 of the winding device 10 to be greater than the suction force of the first capture unit 30 determined based on the diameter and/or shape of the package 22 being formed by the winding device 10.

In the winding device 10, the position is adjusted when the first capture unit 30 is assembled. However, there are some differences in the adjustment of the first capture unit 30 for each of the multiple winding devices 10. As a result, even if the first capture unit 30 generates the same suction force, the success rate of capturing the yarn end may differ for each of the winding devices 10. Therefore, as described above, by adjusting the suction force of the first capture unit 30 based on the success rate of capturing the yarn end, the effect of variations in the assembly position of the first capture unit 30 in each of the winding devices 10 can be suppressed. As a result, even if there is variation in the assembly position of each of the winding devices 10, it is possible to improve the success rate of capturing the yarn end in the entire multiple winding devices 10 while suppressing unnecessary energy consumption of the textile machine 1 caused by generating excessive suction force.

2. Second embodiment In the above-described first embodiment, the suction force of the first catching section 30 is controlled by adjusting the opening degree of the opening 111 in the opening degree adjusting section 11a in each winding device 10. Instead, the management device 12 of the textile machine 1 can control the suction flow rate of the suction source 11 based on the diameter and/or shape of the package 22 formed by the multiple winding devices 10 and/or the formation state of the package 22, thereby controlling the suction force of the first catching section 30 of the multiple winding devices 10.

Although several embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various modifications are possible without departing from the gist of the invention. In particular, several embodiments and modifications described in this specification can be arbitrarily combined as necessary.
(A) The order of the processes and/or the content of the processes in the operation of the textile machine 1 described above may be changed as appropriate without departing from the spirit and scope of the present invention.

(B) The monitoring device 40 is not limited to an optical sensor. For example, the monitoring device 40 may be a capacitive type or other type of monitoring device.

(C) The tension applying device 27 is not limited to a gate type, and for example, a disk type can also be used.

(D) The yarn joining device 38 is not limited to a splicer device, and may be, for example, a mechanical knotter.

(E) The suction source 11 does not have to be common to multiple winding devices 10. In other words, each winding device 10 may be provided with its own suction source 11.

(F) The winding section 17 of the winding device 10 described above rotates the package 22 (tube 22a) by the rotation of the rotating roller 20 to wind the yarn 14 onto the tube 22a (package 22). However, the winding section 17 may also rotate the tube 22a (package 22) directly by a driving source such as a motor. In this case, the yarn 14 may be traversed using a traverse arm. Specifically, for example, the yarn 14 may be hooked onto a traverse arm provided near the cradle 18, and the traverse arm on which the yarn 14 is hooked may be moved back and forth in the length direction of the tube 22a (package 22) to traverse the yarn 14, thereby winding the yarn 14 onto the tube 22a (package 22).

(G) The package 22 (tube 22a) may be rotated by the rotation of a rotating roller 20 that does not have a traverse groove. In this case, the traverse of the yarn 14 can also be performed using a traverse arm.

(H) The winding device 10 is not limited to a device that forms a package 22 by winding the yarn 14 from the yarn supply bobbin 16. For example, it can also be used in a spinning machine that spins yarn from a fiber bundle.

(I) In the above embodiment, the criteria for determining the suction force of the first capture unit 30 and the position of the capture opening 33 were both the diameter and shape of the package 22. This is not limited to the above, and the criteria for determining the suction force of the first capture unit 30 and the position of the capture opening 33 may be only the diameter of the package 22 or only the shape of the package 22.

4. Features of the embodiment The above embodiment has the following features.
(1) A winding device (e.g., winding device 10) includes a yarn supplying unit (e.g., yarn supplying unit 15), a winding unit (e.g., winding unit 17), a catching unit (e.g., first catching unit 30), and a control unit (e.g., control unit 101). The yarn supplying unit supplies a yarn (e.g., yarn 14). The winding unit rotates a tube (e.g., tube 22a) in the winding direction to wind the yarn around the tube and form a package (e.g., package 22). The catching unit has a catching port (e.g., catching port 33) that sucks in the outer yarn end of the package. The control unit controls the winding unit and the catching unit. The control unit also controls the suction force generated in the catching unit based on the diameter and/or shape of the package.

In the above winding device, the control unit controls the suction force generated in the catching unit based on the diameter and/or shape of the package formed by the winding unit. As a result, for example, when the diameter and/or shape of the package makes it difficult to catch the yarn end on the package side, the control unit generates a large suction force in the catching unit. As a result, the yarn end can be reliably caught from the package side. On the other hand, when the diameter and/or shape of the package makes it easy to catch the yarn end on the package side, the control unit reduces the suction force of the catching unit. As a result, only the yarn end on the package side that is originally intended to be caught can be reliably caught, suppressing inappropriate catching such as double ending, while suppressing wasteful energy consumption caused by generating excessive suction force.

(2) In the winding device of (1) above, the control unit may control the position of the capture port relative to the tube when sucking the yarn end based on the diameter and/or shape of the package, and adjust the suction force of the capture unit when a situation occurs in which the position of the capture port moves away from the tube. This makes it possible to adjust the suction force of the capture unit while keeping the distance between the outside of the package and the capture port constant, thereby reducing unnecessary energy consumption.

(3) In the winding device of (2) above, the control unit may calculate the position of the capture port and the suction force of the capture unit based on the diameter and/or shape of the package using a first formula for calculating the position of the capture port relative to the tube with the diameter and/or shape of the package as a variable, and a second formula for calculating the suction force of the capture unit with the diameter and/or shape of the package as a variable. This makes it possible to accurately and easily calculate the position of the capture port relative to the surface of the package and the suction force of the capture unit according to the diameter and/or shape of the package.

(4) The winding device of (2) to (3) above may further include a memory unit. The memory unit stores capture control information. The capture control information includes information on the position of the capture opening relative to the tube, which is set in stages according to the diameter and/or shape of the package, and information on the suction force of the capture unit, which is set in stages according to the diameter and/or shape of the package. In this case, the control unit may control the position of the capture opening relative to the surface of the package and the suction force of the capture unit based on the diameter and/or shape of the package and the capture control information. This makes it easy to control the position of the capture opening relative to the surface of the package and the suction force of the capture unit according to the diameter and/or shape of the package.

(5) The winding device of (1) to (4) above may include a suction source (e.g., suction source 11) and an opening adjustment unit (e.g., opening adjustment unit 11a). The suction source generates a suction force in the capture unit. The opening adjustment unit is provided between the capture unit and the suction source, and has an opening (e.g., opening 111) and a shutter (e.g., shutter 113). The opening allows gas to flow between the capture unit and the suction source. The shutter adjusts the opening of the opening by moving between a fully open position where the opening is fully opened and a fully closed position where the opening is fully closed. In this case, the control unit may control the suction force of the capture unit by controlling the position of the shutter. This allows the opening of the opening to be finely adjusted by moving the shutter, so that the suction force of the capture unit can be accurately adjusted.

(6) In the winding devices described above in (1) to (5), the winding section may have a rotating roller (e.g., rotating roller 20) that rotates in contact with the outer periphery of the package to rotate the tube. Even if a rotating roller is present on the outer periphery of the package, the suction force of the capture section can be appropriately set.

(7) In the winding device of (1) to (6) above, the control unit determines whether the catching unit has succeeded in catching the yarn end, and if it determines that catching the yarn end has failed, the control unit may increase the suction force of the catching unit beyond the suction force at the time when it was determined that catching had failed, and may retry catching the yarn end with the catching unit with the increased suction force. This allows the yarn end to be caught more reliably.

(8) The winding device of (1) to (7) above may further include a monitoring device (e.g., monitoring device 40). The monitoring device detects the state of the yarn to detect short defects, which are defects in the yarn, and long defects, which are defects longer than the short defects. In this case, when the monitoring device detects a long defect, the control unit may determine whether the yarn end has been captured by the capture unit, and when it is determined that the yarn end has been captured, the suction force of the capture unit after capturing the yarn end may be reduced to be lower than the suction force when capturing the yarn end. While a large suction force is required to peel the yarn end off the package, if the yarn end can be peeled off from the package and captured by the capture unit, the yarn on the package side of the yarn end can be attracted to the capture unit with a small suction force. Therefore, by reducing the suction force of the capture unit when suctioning the yarn on the package side of the yarn end to be lower than the suction force when capturing the tip, it is possible to reliably capture the yarn end while suppressing energy consumption.

(9) A textile machine (e.g., textile machine 1) includes a plurality of winding devices (1) to (8) described above and a management unit (e.g., management unit 12). The management unit communicates with the control units of the winding devices and calculates the success rate of yarn end capture by the capture units across the plurality of winding devices. In this textile machine, the control unit of each winding device controls the suction force of the capture unit of that winding device based on the success rate calculated by the management unit and the success rate of yarn end capture in that winding device. This makes it possible to improve the success rate of yarn end capture across the plurality of winding devices, even when there is variation in the capture units in each winding device, while suppressing unnecessary energy consumption by the textile machine caused by the generation of excessive suction force.

(10) A textile machine includes a plurality of winding devices (1) to (8) described above, a suction source, and a management unit. The suction source generates a suction force on the capture units of the plurality of winding devices. The management unit communicates with the control unit and grasps the package formation status of the plurality of winding devices as a whole. In this textile machine, the suction source is common to the plurality of winding devices. The management unit controls the suction force of the suction source based on the package formation status of the plurality of winding devices as a whole. By controlling the suction force of the suction source common to the plurality of winding devices according to the package formation status, it is possible to reliably capture the yarn ends in the plurality of winding devices while suppressing unnecessary energy consumption of the textile machine caused by the generation of excessive suction force.

The present invention can be widely applied to textile machines that wind yarn to form packages.

1: Textile machine 10: Winding device 15: Yarn supplying section 16: Yarn supplying bobbin 17: Winding section 18: Cradle 20: Rotating roller 21: Roller drive motor 21a: Roller drive control device 22: Package 22a: Tube 25: Unwinding assist device 26: Restricting member 27: Tensioning device 30: First catching section 31: Shaft section 32: Pipe section 33: catching port 34: Second catching section 35: Shaft section 36: Pipe section 37: catching port 38: Yarn joining device 40: Monitoring device 41: Cutter 60: Upper thread sensor 601: Case 602: Light projecting section 603: Light receiving section 604: Support member 100: Control device 101: Control section 103: Memory section 11: Suction source 11a: Opening degree adjustment section 11b : Tubular member 111 : Opening 113 : Shutter 115 : Motor 12 : Management device 12a : Display 12b : Input interface 13 : Doffing device 14 : Yarn CI : Capture control information

Claims (10)

a yarn supplying section for supplying a yarn;
a winding section that rotates a tube in a winding direction to wind the yarn around the tube to form a package;
a catcher having a catch port for suctioning the yarn end on the outer side of the package;
A control unit that controls the winding unit and the capture unit;
Equipped with
The control unit controls the suction force generated by the capture unit based on the diameter and/or shape of the package.
Winding device. The control unit is
controlling a position of the capture port relative to the tube when the yarn end is sucked based on a diameter and/or a shape of the package;
The winding device according to claim 1 , further comprising: a suction force of the capture portion being adjusted when a situation occurs in which the capture port is displaced from the tube. The winding device according to claim 2, wherein the control unit calculates the position of the capture port and the suction force of the capture unit based on the diameter and/or shape of the package, using a first formula for calculating the position of the capture port relative to the tube with the diameter and/or shape of the package as a variable, and a second formula for calculating the suction force of the capture unit with the diameter and/or shape of the package as a variable. A memory unit is further provided for storing capture control information including information regarding the position of the capture port relative to the tube, which is set in stages according to the diameter and/or shape of the package, and information regarding the suction force of the capture unit, which is set in stages according to the diameter and/or shape of the package,
The winding device according to claim 2 or 3, wherein the control unit controls the position of the capture opening relative to the surface of the package and the suction force of the capture unit based on the diameter and/or shape of the package and the capture control information. A suction source that generates a suction force on the capture portion;
an opening adjustment unit provided between the capture unit and the suction source, the opening allowing gas to flow between the capture unit and the suction source, and a shutter that adjusts the opening of the opening by moving between a fully open position that fully opens the opening and a fully closed position that fully closes the opening;
Further equipped with
The winding device according to any one of claims 1 to 4, wherein the control unit controls the suction force of the capture unit by controlling the position of the shutter. The winding device according to any one of claims 1 to 5, wherein the winding section has a rotating roller that rotates in contact with the outer periphery of the package to rotate the tube. The control unit is
determining whether the catching portion has successfully caught the yarn end;
When it is determined that the catching of the yarn end has failed, the suction force of the catching portion is made larger than the suction force at the time when it is determined that the catching of the yarn end has failed;
The catching portion is caused to catch the yarn end again with increased suction force.
The winding device according to any one of claims 1 to 6. A monitoring device is further provided for detecting a state of the yarn, thereby detecting a short defect, which is a defect in the yarn, and a long defect, which is a defect longer than the short defect,
The control unit is
When the monitoring device detects a long defect, it is determined whether the yarn end is caught by the catching portion,
When it is determined that the yarn end has been caught, a suction force of the catching part after the yarn end has been caught is reduced to be less than a suction force when the yarn end is caught.
The winding device according to any one of claims 1 to 7. A plurality of winding devices according to any one of claims 1 to 8;
a management unit that communicates with the control unit and calculates a success rate of capturing the yarn end by the capturing unit in all of a plurality of winding devices,
the control unit of each winding device controls a suction force of the capture unit of the winding device based on the success rate calculated by the management unit and a success rate of capturing the yarn end in the winding device.
Textile machinery. A plurality of winding devices according to any one of claims 1 to 8;
A suction source that generates a suction force on the capture portions of the plurality of winding devices;
a management unit that communicates with the control unit and grasps the package formation status of all of a plurality of winding devices,
the suction source is common to a plurality of winding devices;
the management unit controls the suction force of the suction source based on the package formation status of all of the plurality of winding devices.
Textile machinery.