Yarn take-up machine

Abstract

A yarn winding machine is provided. A winder unit (10) of the yarn winding machine unwinds a yarn (20) from a cross-wound package (21) and winds the yarn (20) on a package (30). The winder unit (10) includes a light sensor (45) disposed laterally of the cross-wound package (21) to detect a yarn layer of the cross-wound package (21), and a sensor moving device (60) having a drive motor (61) to move the light sensor (45) in a predetermined moving direction (D2).

Description

Technical Field

[0001] This invention relates to a yarn winding machine. Background Technology

[0002] Previously, in unwinding devices for packaged yarns, it was known that a technique was used to monitor the diameter of the package by means of multiple optical sensors arranged facing the large-diameter side end face of the package (see Japanese Patent Application Publication No. 4-85266).

[0003] Multiple optical sensors are arranged radially on the large-diameter side end face of the package to detect the position of the outer periphery of the yarn layer. This determines the package's diameter. Based on the package's diameter, the device calculates and adjusts the length of the air loop to reduce unwinding tension.

[0004] As with the existing devices described above, when multiple optical sensors are arranged radially, the position of each sensor is already determined. Therefore, the roll diameter can be detected only at multiple levels corresponding to the number of sensors. For example, in a structure with one inner layer sensor and one outer layer sensor, the roll diameter can be detected only at three levels: the outer layer, the middle layer, and the inner layer. Therefore, when the unwinding speed (winding speed) is varied based on the roll diameter, three levels of speed variation (adjustment) are possible. Summary of the Invention

[0005] There are limits to increasing production speed within a limited number of speed variations (adjustments). Therefore, the object of this invention is to provide a yarn take-up machine that can expand the set range of production speed by allowing for more flexible speed variations.

[0006] The present invention is a yarn take-up machine that unwinds yarn from a cross-wound package containing laterally moving yarn and takes it into a take-up package. The yarn take-up machine includes: a yarn feeding section that holds the cross-wound package; a photosensitive sensor disposed to the side of the cross-wound package held by the yarn feeding section for detecting the yarn layers of the cross-wound package; and a sensor moving device having a drive source that moves the photosensitive sensor in a manner parallel to the radial direction of the cross-wound package held by the yarn feeding section.

[0007] According to this yarn take-up machine, a photosensitive sensor is moved along the moving direction by a drive source for a sensor moving device. The photosensitive sensor can be moved radially parallel to the cross-wound package held by the yarn feed section, depending on the change in the diameter of the cross-wound package. Therefore, the yarn winding speed can be varied more flexibly according to the diameter of the cross-wound package. As a result, the range of production speed settings can be expanded.

[0008] Alternatively, the yarn take-up machine may also include a sensor drive control unit, which controls the drive source of the sensor movement device based on the detection information of the yarn layer detected by the optical sensor. In this case, it is possible to more accurately and appropriately move the optical sensor in response to changes in the diameter of the cross-wound package.

[0009] Alternatively, the yarn take-up machine may also include: a package diameter acquisition unit that acquires the radial length variation of the cross-wound package based on detection information of the yarn layers detected by a light sensor; and a storage unit that stores the relationship between the radial length of the cross-wound package acquired by the package diameter acquisition unit and indicators related to yarn take-up in the yarn take-up machine. In this case, the relationship between the radial length variation of the cross-wound package and indicators related to yarn take-up can be provided or reported to the user, improving the production convenience of the yarn take-up machine.

[0010] Alternatively, the yarn take-up machine may also include an indicator voltage acquisition unit, which acquires the indicator voltage from the tension application device that applies tension to the yarn, and a storage unit stores the relationship between the diameter of the cross-wound package acquired by the package diameter acquisition unit and the indicator voltage from the tension application device acquired by the indicator voltage acquisition unit. In this case, the tension applied to the yarn by the tension application device can be determined based on the diameter of the cross-wound package. For example, reference data can be provided to the user for determining the tension setting value.

[0011] Alternatively, the yarn take-up machine may also include a cause estimation unit, which estimates the cause of yarn breakage as an indicator, and a storage unit stores the relationship between the diameter of the cross-wound package obtained by the package diameter acquisition unit and the cause of yarn breakage estimated by the cause estimation unit. This allows the user to be provided with the relationship between the diameter of the cross-wound package and the cause of yarn breakage, and enables the setting of all controls during yarn take-up (e.g., batch settings).

[0012] Alternatively, the yarn take-up machine may also include: a package diameter acquisition unit that acquires the diameter of the cross-wound package based on detection information of the yarn layers detected by a light sensor; and a winding speed control unit that controls the winding speed of the yarn based on the diameter of the cross-wound package acquired by the package diameter acquisition unit. In this case, the unwinding speed (winding speed) can be flexibly varied based on the diameter of the cross-wound package, thereby increasing the production speed.

[0013] Alternatively, the sensor moving device moves the light sensor in a direction orthogonal to the yarn's travel direction. The diameter of the cross-wound package varies in a direction orthogonal to the yarn's travel direction. Therefore, by moving the light sensor using the sensor moving device, it is easy to make the light sensor follow the change in the diameter of the cross-wound package.

[0014] Alternatively, the driving source could be a stepper motor. This structure allows for more precise control of the optical sensor's position using a simpler method.

[0015] According to the present invention, by making the winding speed of the yarn more flexible, the range of production speed settings can be expanded. Attached Figure Description

[0016] Figure 1 This is a front view of an automatic winding machine equipped with a winding machine unit according to an embodiment of the present invention.

[0017] Figure 2 It means Figure 1 A schematic diagram and block diagram of the general structure of the winding machine unit.

[0018] Figure 3 This is a diagram illustrating a structural example of a light sensor and a sensor moving device disposed on the side of a cross-wound package.

[0019] Figure 4 This diagram illustrates the movement of the optical sensor in relation to changes in the diameter of the cross-wound package.

[0020] Figure 5 This diagram illustrates a comparison between the unit's speed control and existing speed control.

[0021] Figure 6 This is a diagram illustrating an example of the relationship between the roll diameter and the indicated voltage displayed on the machine control unit's display panel.

[0022] Figure 7 This diagram illustrates an example of the trend of yarn breakage related to the roll diameter displayed on the machine control unit. Detailed Implementation

[0023] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in the description of the drawings, the same reference numerals are used to denote the same elements, and repeated descriptions are omitted.

[0024] Reference Figure 1 The overall structure of the automatic winding machine 1 equipped with the winding machine unit (yarn take-up machine) 10 of this embodiment will be described. In this specification, "upstream" and "downstream" refer to the upstream and downstream directions of the yarn travel during yarn take-up.

[0025] like Figure 1As shown, the automatic winding machine 1, as its main structure, includes multiple winding machine units 10 arranged in an array, an automatic doffing device 80, and a machine control device 90. A conventional automatic winding machine has the following structure: the yarn fed onto a bobbin, which is stacked sequentially from one end of the bobbin, is unwound; the unwound yarn 20 is wound onto a take-up bobbin 22 while moving laterally (cross-winding). Furthermore, there are also automatic winding machines of the type where the yarn 20 unwound from the cross-wound package 21 is rewound onto the take-up bobbin 22 while moving laterally (see reference). Figure 2 The yarn is then re-wound into a cross-wound package (take-up package) 30. In this invention, the latter's automatic winding machine is taken as the object. Each winding machine unit 10 of this invention winds the yarn 20 unwound from the cross-wound package 21 into the take-up bobbin 22 (see reference 22) while moving it laterally. Figure 2 This process forms a package (wound package) 30. Additionally, traverse motion refers to the reciprocating motion applied to the wound yarn. Package 30 is a cross-wound package. An automatic winding machine 1, for example, is a rewinding machine that forms a conical package 30 from a conical cross-wound package 21.

[0026] When the winding package 30 becomes a full roll (full tube) in each winding machine unit 10, the automatic doffing device 80 moves to the position of the winding machine unit 10, so that the full roll 30 is discharged from the winding machine unit 10, and an empty bobbin is supplied to the winding machine unit 10.

[0027] The machine control unit 90 includes a setting unit 91, a data storage unit 92, a display unit 93, and a speaker 94. The setting unit 91 allows the operator to input predetermined setting values ​​or select an appropriate control method to set each winding machine unit 10. The predetermined setting values ​​input by the operator to the setting unit 91 include bobbin information used to determine the type (shape) of the take-up bobbin 22 for taking up the yarn 20. Furthermore, the bobbin information is not limited to information that determines the type of take-up bobbin 22 used by the operator directly. For example, when the type of take-up bobbin 22 used is determined based on the type of yarn 20 being wound, the bobbin information can also be determined based on the type of yarn 20 input by the operator.

[0028] Furthermore, the setting unit 91 accepts settings for various control modes, as described below. These various control modes are input by the operator. The setting unit 91 sets the operator-input control mode for each winding machine unit 10. For example... Figure 2As shown, control is performed based on the unit control unit 50 by operating each winding machine unit 10 according to a set control mode. The data storage unit 92 stores, for example, data relating the diameter of the cross-wound package 21 to indicators related to the take-up of yarn in the winding machine unit 10. The data stored in the data storage unit 92 is reported to the user using a display unit 93 or a speaker 94. The display unit 93 is configured to display the take-up status of the yarn 20 in each winding machine unit 10 and any malfunctions that have occurred. The display unit 93 displays information associated with the data stored in the data storage unit 92, such as information on the yarn breakage frequency corresponding to the diameter of the cross-wound package 21 and information on the indicated voltage of the tension application device 13. Alternatively, the display unit 93 may be configured as a touch panel, with a setting unit 91 included within the display unit 93. The speaker 94 reports, via sound, information associated with the data displayed on the display unit 93, such as information on the yarn breakage frequency corresponding to the diameter of the cross-wound package 21 and information on the indicated voltage of the tension application device 13.

[0029] Display unit 93, for example, displays the relationship between the diameter of the cross-wound package 21 and indicators related to the take-up of yarn in the winding machine unit 10. For this display example, refer to... Figure 6 and Figure 7 As explained below. The speaker 94 can also report to the user, for example, the diameter of the cross-wound package 21, which is prone to yarn breakage, through sound.

[0030] Next, refer to Figure 2 The structure of the winding machine unit 10 will be described in detail. For example... Figure 2 As shown, each winding machine unit 10 has a take-up unit body 17 and a unit control unit 50 as its main structure.

[0031] The unit control unit 50 is configured, for example, to include a CPU, RAM, ROM, I / O ports, and communication ports. The ROM stores programs for controlling the various components of the winding unit body 17. The I / O ports and communication ports are connected to the various parts of the winding unit body 17 (details will be explained below) and the machine control device 90, and are configured to communicate control information, etc. Therefore, the unit control unit 50 can control the operation of the various parts of the winding unit body 17.

[0032] The take-up unit body 17, along the yarn travel path between the cross-wound package 21 and the contact roller 29, sequentially includes, from the cross-wound package 21 side, a yarn unwinding auxiliary device 12, a tension application device 13, a yarn splicing device 14, a photoelectric length-fixing device (yarn speed detection unit) 15, and a yarn monitoring device 16. A yarn feeding unit 11 is provided at the lower part of the take-up unit body 17.

[0033] The yarn feeding section 11 is configured to hold the cross-wound package 21, which is transported by an operator or by a bobbin transport system (not shown), in a predetermined position. A core member (not shown) is erected on the mounting plate 19a of the mounting platform 19 located at the lower end of the winding machine unit 10, for example, in a direction slightly inclined relative to the horizontal plane towards the central axis L. The cross-wound package 21 is maintained in a predetermined posture (see reference...) by inserting the core member into the hole at the center of the cross-wound package 21. Figure 2 and Figure 3 While maintaining the cross-wound package 21 in this position, the yarn is unwound by the winding machine unit 10.

[0034] The yarn unwinding assist device 12 has a limiting member 40 disposed above the core tube of the cross-wound package 21. It assists in unwinding the yarn 20 from the cross-wound package 21 by varying the unwinding tension of the yarn 20. The limiting member 40 contacts the air ring formed on the upper part of the yarn 20 on the cross-wound package 21 due to the rotation and centrifugal force of the yarn 20 unwinding from the cross-wound package 21. By controlling the air ring of the yarn 20 to an appropriate size, it assists in the unwinding of the yarn 20. The limiting member 40 is also referred to as an air ring guide. Furthermore, an anti-twist device to prevent yarn 20 twisting and a yarn sensor for detecting the unwound yarn are disposed near the limiting member 40.

[0035] The tension applying device 13 applies a predetermined tension to the traveling yarn 20. For example, a grid-type device with movable comb teeth arranged relative to fixed comb teeth can be used as the tension applying device 13. The movable comb teeth rotate via a rotating solenoid, thereby engaging or disengaging relative to the fixed comb teeth. In addition to the aforementioned grid-type device, the tension applying device 13 can also be a disc-type device. The unit control unit 50 considers the measured tension value measured by the tension measuring device 18 to determine the indication voltage to be sent to the tension applying device 13. The indication voltage sent to the tension applying device 13 is also sent to the indication voltage acquisition unit 56 of the unit control unit 50.

[0036] When yarn is cut due to a yarn defect detected by the yarn monitoring device 16, or when yarn breaks during unwinding from the cross-wound package 21, the yarn splicing device 14 splices the lower yarn from the cross-wound package 21 with the upper yarn from the package 30. Such a yarn splicing device for splicing the upper and lower yarns can be a mechanical knotter, a splicer using fluids such as compressed air, etc. Alternatively, a structure can be adopted in which the upper and lower yarns are spliced ​​manually by an operator without the yarn splicing device 14.

[0037] The photoelectric length measuring device 15 is a non-contact photoelectric length measuring device that detects the travel speed, i.e., yarn speed, of the yarn 20 without contacting it. Specifically, the photoelectric length measuring device 15 projects the yarn 20 onto a light-receiving element and processes the changes in photocurrent generated as the projected yarn 20 travels by using a so-called spatial filtering principle, thereby detecting the yarn speed of the yarn 20 wound on the take-up bobbin (bobbin) 22 or the package 30.

[0038] The yarn monitoring device 16 includes: a machine head 49 equipped with a sensor (not shown) for detecting the thickness of the yarn 20; and an analyzer 54 that processes the yarn thickness signal from the sensor. The analyzer 54 is located within the unit control unit 50. The yarn monitoring device 16 detects yarn defects such as thick yarn by monitoring the yarn thickness signal from the aforementioned sensor. A cutter 39 is provided near the machine head 49 to immediately cut the yarn 20 when the yarn monitoring device 16 detects a yarn defect.

[0039] A lower yarn capturing member 25 is provided on the lower side of the yarn splicing device 14 to capture the yarn end of the lower yarn and guide it to the yarn splicing device 14. An upper yarn capturing member 26 is provided on the upper side of the yarn splicing device 14 to capture the yarn end of the upper yarn and guide it to the yarn splicing device 14. The lower yarn capturing member 25 includes a lower yarn tube arm 33 and a lower yarn suction port 32 formed at the end of the lower yarn tube arm 33. The upper yarn capturing member 26 includes an upper yarn tube arm 36 and an upper yarn suction port 35 formed at the end of the upper yarn tube arm 36.

[0040] The lower yarn tube arm 33 and the upper yarn tube arm 36 are configured to rotate around axes 34 and 37, respectively. Appropriate negative pressure sources are connected to both the lower and upper yarn tube arms 33 and 36. The lower yarn tube arm 33 is configured to generate a suction flow at the lower yarn suction port 32 to attract and capture the yarn end of the lower yarn. The upper yarn tube arm 36 is configured to generate a suction flow at the upper yarn suction port 35 to capture the yarn end of the upper yarn. Gates (not shown) are provided at the base of both the lower and upper yarn tube arms 33 and 36. Each gate opens and closes according to a signal from the unit control unit 50. This controls the stopping and starting of the suction flow from the lower yarn suction port 32 and the upper yarn suction port 35.

[0041] The take-up unit body 17 also includes: a cradle 23 that supports the take-up bobbin 22 so that it can be loaded, unloaded, and rotated; and a contact roller 29 that contacts the outer peripheral surface of the take-up bobbin 22 or the outer peripheral surface of the package 30 and is rotatable. The take-up bobbin 22 has a conical (conical) shape with different diameters at both ends. Near the cradle 23, the take-up unit body 17 has an arm-type traverse device 70 for traversely moving the yarn 20, which traverses the yarn 20 while winding it onto the take-up bobbin 22 or the package 30. A guide plate 28 is provided slightly upstream of the traverse portion. The guide plate 28 guides the yarn 20 on the upstream side toward the traverse portion. Further upstream of the guide plate 28, a ceramic traverse fulcrum 27 is provided. The traverse device 70 uses the traverse fulcrum 27 as a fulcrum to move the yarn 20 along... Figure 2 Move laterally in the direction indicated by the arrow.

[0042] The main body 17 of the winding unit moves the yarn 20 laterally using the traversing device 70, and winds the yarn 20 onto the conical winding tube 22 to form a conical package 30.

[0043] The traverse mechanism 70 includes a traverse drive motor 76 that reciprocates a traverse arm (not shown). The traverse drive motor 76 may be, for example, a servo motor. The operation of the traverse drive motor 76 is controlled by the unit control unit 50. The traverse drive motor 76 may also be a stepper motor or a voice coil motor, or other types of motors. A hook-shaped yarn guide 73 is formed at the end of the traverse arm. By reciprocating the traverse arm (moving the yarn guide 73) while the yarn 20 is guided by the yarn guide 73, the traverse mechanism 70 can traverse the yarn 20 wound on the package 30.

[0044] The contact roller 29 abuts against the outer peripheral surface of the take-up bobbin 22 or the package 30, and rotates accordingly as the take-up bobbin 22 or the package 30 rotates. The contact roller 29 has a cylindrical shape with the same diameter at both ends. The outer peripheral surface of the package 30 is pressed against the contact roller 29. The contact roller 29 has the function of shaping the package 30. In addition, the contact roller 29 has the function of holding the traversing yarn 20 in a traversing position and winding it into the package 30. A rotation speed sensor 31 is provided on the contact roller 29 to detect the rotation speed of the contact roller 29. The rotation speed sensor 31 sends a rotation detection signal corresponding to the rotation speed of the contact roller 29 to the unit control unit 50. As the rotation speed sensor 31, various sensors such as sensors that measure changes in the magnetic force of the magnet mounted on the contact roller 29 can be used.

[0045] The cradle 23 has a pair of first cradle arms 23a and second cradle arms 23b; and a connecting portion 23c that connects the base end of the first cradle arm 23a to the base end of the second cradle arm 23b. The cradle 23 is configured to rotate about a rotation axis 48 provided in the connecting portion 23c. The rotation of the cradle 23 absorbs the increase in diameter of the package 30 associated with the winding of the yarn 20 into the take-up bobbin 22.

[0046] A first bobbin holding part B1 is provided at the end of the first cradle arm 23a to hold one end of the take-up bobbin 22. A second bobbin holding part B2 is provided at the end of the second cradle arm 23b to hold the other end of the take-up bobbin 22. Furthermore, a winding drive motor 41, which is a servo motor, is mounted at the end of the first cradle arm 23a. The winding drive motor 41 drives the take-up bobbin 22, held by the first bobbin holding part B1 and the second bobbin holding part B2, to rotate in order to wind the yarn 20 onto the take-up bobbin 22. The winding drive motor 41 can drive the take-up bobbin 30 (take-up bobbin 22) to rotate forward in the winding direction and to rotate in reverse in the opposite direction of the winding direction. The motor shaft (rotation shaft) of the winding drive motor 41 is connected to the first bobbin holding part B1, which holds the take-up bobbin 22, in a manner that prevents relative rotation. The winding drive motor 41 rotates the winding bobbin 22 by rotating the first bobbin holding part B1 (so-called direct drive method).

[0047] The operation of the roll drive motor 41 is controlled by the roll drive control unit 52 of the unit control unit 50. The roll drive motor 41 is not limited to a servo motor; various motors such as stepper motors and induction motors can be used. A rotation speed sensor 24 is provided in the roll drive motor 41 to detect the rotational speed of the motor shaft. The rotation speed sensor 24 sends a rotation detection signal corresponding to the rotational speed of the motor shaft to the winding speed acquisition unit 51 of the unit control unit 50.

[0048] Each winding machine unit 10 includes: a light sensor 45 disposed on the side of the cross-wound package 21 to detect the yarn layer of the cross-wound package 21; and a sensor moving device 60 that holds the light sensor 45 and moves the light sensor 45 along the moving direction D2. Figure 3 This diagram illustrates an example of the structure of a light sensor 45 and a sensor moving device 60 disposed on the side of the cross-wound package 21. Figure 3As shown, the light sensor 45 has a light-emitting and receiving portion 45a, which faces the outer peripheral surface of the cross-wound package 21. The light sensor 45 detects the presence of the yarn layer of the cross-wound package 21 by detecting reflected light from the cross-wound package 21 through the light-emitting and receiving portion 45a. The light sensor 45 detects the absence of the yarn layer of the cross-wound package 21 in the optical path of the light-emitting and receiving portion 45a by not detecting reflected light from the cross-wound package 21 through the light-emitting and receiving portion 45a.

[0049] The sensor moving device 60 is configured to move the light sensor 45 along a moving direction D2 orthogonal to the traveling direction D1 of the yarn 20. The traveling direction D1 of the yarn 20 may, for example, be parallel to the central axis L of the cross-wound package 21. Based on the sensor moving device 60, the moving direction D2 of the light sensor 45 is parallel to the radial direction of the cross-wound package 21 mounted on the mounting platform 19. That is, the moving direction D2 of the light sensor 45 is the same as the radial direction of the cross-wound package 21.

[0050] The sensor moving device 60 is configured to move the light sensor 45, for example, via a ball screw mechanism. As an example, the sensor moving device 60 includes: a housing 62 fixed to a mounting plate 19a and / or side plate 19b of a mounting platform 19; a threaded shaft 63 fixed within the housing 62 and extending along the moving direction D2; and a moving part 64 including a nut part 64a engaging with the threaded shaft 63 and movable along the moving direction D2 by rotation of the threaded shaft 63. For example, the light sensor 45 is fixed to the moving part 64. In the yarn 20's traveling direction D1, the moving part 64 is positioned downstream (above) of the light sensor 45, and a sliding plate part 67 is positioned upstream (below) of the light sensor 45 in the yarn 20's traveling direction D1. In other words, the light sensor 45 is disposed between the moving part 64 and the sliding plate part 67. The sliding plate portion 67 is, for example, an L-shaped plate member, and can slide along the corner of a rectangular guide portion 65 extending in the movement direction D2. A guide rod insertion portion 68 is fixed to the sliding plate portion 67, and a guide rod 66 is inserted through the guide rod insertion portion 68. The threaded shaft 63 and the guide rod 66 extend parallel (in the movement direction D2), and there is a linear movement area of ​​the light sensor 45 between them. The moving portion 64, the sliding plate portion 67, and the guide rod insertion portion 68, while holding the light sensor 45, are guided by the threaded shaft 63, the guide portion 65, and the guide rod 66 to move in the movement direction D2.

[0051] The sensor moving device 60 has a drive motor 61 connected to either end of the threaded shaft 63. The drive motor 61 is, for example, a stepper motor. The drive motor 61 is fixed to the housing 62 and rotates the threaded shaft 63 under the control of the sensor drive control unit 59 of the unit control unit 50. The drive motor 61 is the driving source that moves the light sensor 45 along the moving direction D2. The drive motor 61 can also be a stepper motor or a servo motor, etc.

[0052] return Figure 2 In addition to the analyzer 54 described above, the unit control unit 50 also includes a winding speed acquisition unit 51, a roll drive control unit 52, a roll diameter acquisition unit 53, a cause estimation unit 55, an indication voltage acquisition unit 56, a storage unit 57, a data transmission unit 58, and a sensor drive control unit 59.

[0053] The winding speed acquisition unit 51 acquires the winding speed of the yarn 20 by acquiring a signal sent from the rotation speed sensor 24 of the package drive motor 41. In the winding machine unit 10, the winding speed of the yarn 20 is equal to the unwinding speed of the yarn 20 as it unwinds from the cross-wound package 21.

[0054] The package drive control unit (winding speed control unit) 52 controls the package drive motor 41 based on the diameter of the cross-wound package 21 obtained by the package diameter acquisition unit 53, thereby controlling the winding speed of the yarn 20. The package drive control unit 52 controls the package drive motor 41 in a manner that adjusts the winding speed of the yarn 20 to the speed shown in a predetermined control mode according to the diameter of the cross-wound package 21. Alternatively, the package drive control unit 52 may pre-store an appropriate winding speed based on the diameter of the cross-wound package 21 or based on the unwinding tension estimated based on the diameter of the cross-wound package 21. The package drive control unit 52 may also control the package drive motor 41 in a manner that adjusts the winding speed of the yarn 20 to an appropriate winding speed.

[0055] The roll diameter acquisition unit 53 acquires the diameter of the cross-wound roll 21 based on the detection information of the yarn layers of the cross-wound roll 21 by the optical sensor 45. The optical sensor 45 can also be moved and controlled by the sensor drive control unit 59 to repeatedly stop and move slightly, and the diameter of the cross-wound roll 21 is acquired by detecting the absence of the yarn layer by the optical sensor 45.

[0056] The cause estimation unit 55, for example, based on the signal output from the yarn monitoring device 16, estimates whether the yarn breakage is caused by yarn defects (inferior yarn or uneven yarn, etc.) or by poor unwinding (loosening, etc.) when a yarn breakage occurs. The cause estimation unit 55 establishes a corresponding estimation and storage of the cause of the yarn breakage with respect to the diameter of the cross-wound package 21 obtained by the package diameter acquisition unit 53.

[0057] The indicator voltage acquisition unit 56 acquires the indicator voltage in the tension application device 13. The indicator voltage in the tension application device 13 is stored in a corresponding manner to the diameter of the cross-wound roll 21 acquired by the roll diameter acquisition unit 53.

[0058] The storage unit 57 generates and stores data representing the relationship between the diameter of the cross-wound package 21 and indicators related to the take-up of yarn in the winding machine unit 10, according to the control mode described above. The data transmission unit 58 transmits the data stored in the storage unit 57 to the machine control device 90 and stores it in the data storage unit 92.

[0059] The sensor drive control unit 59 controls the drive motor 61 of the sensor moving device 60 based on the detection information from the light sensor 45. The sensor drive control unit 59 controls the drive motor 61 to repeatedly move and stop the light sensor 45 slightly, thus controlling the movement of the light sensor 45. More specifically, the sensor drive control unit 59 can also control the light sensor 45 to move slightly when the light sensor 45 detects the absence of a yarn layer. Alternatively, the sensor drive control unit 59 can also control the light sensor 45 to move slowly if no yarn layer of the cross-wound package 21 is detected. Figure 4 As shown, at the initial stage of unwinding, the light sensor 45 is located at the position corresponding to the outermost yarn layer position Pa in the cross-wound package 21A with a large diameter. However, as the yarn 20 is unwound, the cross-wound package 21 becomes thinner. Because it is a cross-wound package, the cross-wound package 21 maintains a conical shape, and its diameter decreases. If the light sensor 45 is controlled such that it cannot detect the yarn layer position Pa, it is moved closer to the central axis L when viewed from the side. The light sensor 45 is then moved to the position corresponding to the outermost yarn layer position Pb in the cross-wound package 21B with a small diameter.

[0060] According to the winding machine unit 10 of this embodiment, the photosensitive sensor 45 is moved along the moving direction D2 by the drive motor 61 of the sensor moving device 60. The photosensitive sensor 45 can be moved according to the change in the diameter of the cross-wound package 21. Therefore, the winding speed of the yarn 20 can be varied more flexibly according to the diameter of the cross-wound package 21. As a result, the setting range of production speed can be expanded.

[0061] The winding machine unit 10 also includes: a package diameter acquisition unit 53, which acquires the diameter of the cross-wound package 21 based on the detection information of the yarn layer by the optical sensor 45; and a package drive control unit 52, which controls the winding speed of the yarn 20 based on the diameter of the cross-wound package 21 acquired by the package diameter acquisition unit 53. Therefore, the unwinding speed (winding speed) can be flexibly varied based on the diameter of the cross-wound package 21, thereby increasing the production speed. This also expands the range of production speed settings.

[0062] use Figure 5 A specific example of winding speed is given. Figure 5 In the diagram, the thick dashed line represents the speed control in the conventional unit control unit, while the thick solid line represents the speed control in the unit control unit 50 of this embodiment. Conventionally, for example, when using two optical sensors fixed at two radially positioned locations, the winding speed is controlled at two points: the moment the outer sensor switches from on to off (time T1 in the diagram) and the moment the inner sensor switches from on to off (time T2 in the diagram). Furthermore, unwinding is performed at a low speed V0 up to time T0. That is, from time T0 to time T1, unwinding is performed at a relatively low speed V1 as the outer layer speed; from time T1 to time T2, unwinding is performed at a higher speed V2 as the middle layer speed; and from time T2 until near the end of unwinding, unwinding is performed at a relatively low speed V1 as the outer layer speed. In contrast, in this embodiment, as shown by the solid line in the diagram, the speed variation can be made more flexibly than with three-level speed control. More specifically, it is possible to unwind at the same winding speed as before at the previous control switching moments (times T0, T1, and T2), but to unwind at a higher winding speed than before during the time interval between these moments. As a result, production speed is increased.

[0063] In addition, the winding machine unit 10 also includes a sensor drive control unit 59, which controls the drive motor 61 of the sensor moving device 60 based on the detection information of the yarn layer obtained by the optical sensor 45. As a result, the optical sensor 45 can be moved more accurately and appropriately according to the change in the diameter of the cross-wound package 21.

[0064] The winding machine unit 10 also includes a storage unit 57, which stores the relationship between the diameter of the cross-wound package 21 obtained by the package diameter acquisition unit 53 and indicators related to the take-up of the yarn 20 in the winding machine unit 10. This allows the relationship between the diameter of the cross-wound package 21 and the indicators related to the take-up of the yarn 20 to be provided or reported to the user, improving the production convenience of the winding machine unit 10.

[0065] More specifically, the winding machine unit 10 also includes an indicator voltage acquisition unit 56, which acquires the indicator voltage as an indicator in the tension application device 13, and a storage unit 57 stores the relationship between the diameter of the cross-wound package 21 and the indicator voltage in the tension application device 13. Furthermore, the winding machine unit 10 also includes a cause estimation unit 55, which estimates the cause of yarn breakage as an indicator, and the storage unit 57 stores the relationship between the diameter of the cross-wound package 21 and the cause of yarn breakage.

[0066] These data are utilized, for example, in the control modes of "optimal speed control setting" and "package density priority setting". In "optimal speed control setting", the winding speed of yarn 20 is automatically adjusted by package drive control unit 52. Storage unit 57 stores the diameter data of cross-wound package 21 when yarn breakage occurs, and stores this data in data storage unit 92 of machine control device 90. Based on the data collected in data storage unit 92, control is performed so that, for example, if yarn breakage occurs frequently at a diameter of 130mm, the unwinding speed is automatically reduced at a position of 130mm ± 3mm while winding yarn 20. In contrast, for example, at a position (diameter) where there is no yarn breakage but the indicator voltage of tension application device 13 is high, the unwinding speed is automatically set to high and the indicator voltage of tension application device 13 is reduced, thereby enabling high-speed winding of yarn without changes in yarn tension. This allows the unwinding speed (winding speed) to be increased without changes in unwinding tension. According to this "optimal speed control", yarn breakage is reduced and productivity is increased.

[0067] Furthermore, the "bundle density priority setting" can be optimized for users utilizing the winding machine unit 10 in dyeing winding, for example. By controlling the indicator voltage of the tension application device 13 for each bundle diameter, it is possible to adjust to a higher unwinding tension value (diameter) that cannot be reduced during the adjustment of the tension application device 13, thereby reducing the unwinding speed. As a result, winding can be performed with almost the same tension from the beginning to the end of the unwinding operation. For example, in dyeing winding, in order to facilitate dyeing of the bundle 30, it is necessary for the user to reduce the density and wind the yarn 20 with the same tension. Such a tension uniformity control mode provides advantages to the user.

[0068] Alternatively, the display unit 93 of the machine control device 90 can be configured to display the indicated voltage of the tension application device 13 or the tendency for yarn breakage in accordance with the diameter of the cross-wound package 21. Figure 6 In the example shown, the change in the indicated voltage of the tension application device 13 is displayed in correspondence with the diameter of the cross-wound package 21. Based on this display (report), the load applied to the yarn 20 by the tension application device 13 can be visually assessed, serving as a reference for the user when determining the settings in the tension application device 13.

[0069] In addition, Figure 7 In the example shown, the areas (diameters) prone to yarn breakage are illustrated in relation to the diameter of the cross-wound package 21. This example shows a tendency for frequent yarn breakage at a diameter of 180 mm, and a tendency for yarn breakage to occur at a diameter of 140 mm. Figure 7 As shown, the numerical value of the area (diameter) where yarn breakage can occur is displayed together with the size of a circle representing the frequency of its occurrence. In addition to pie charts, bar charts can also be displayed. Both pie charts and bar charts can be displayed together, or they can be displayed as other types of graphs.

[0070] Through the above control, the collected data is stored in the machine control device 90, enabling the identification of changes in package diameter and indicated voltage, as well as yarn breakage trends, at any location (diameter) for each spindle and machine. The tension applied to the yarn by the tension application device 13 is established in accordance with the diameter of the cross-wound package 21. For example, reference data is provided for the user to determine the tension setting value. Furthermore, the relationship between the diameter of the cross-wound package 21 and the cause of yarn breakage can be provided to the user, and settings for all controls during yarn winding (e.g., batch settings) can be configured. Multiple types of settings, such as "optimal speed control setting" and "package density priority setting," can be prepared as batch settings.

[0071] The sensor moving device 60 moves the light sensor 45 along a moving direction D2 orthogonal to the traveling direction D1 of the yarn 20. The diameter of the cross-wound package 21 changes in a direction orthogonal to the traveling direction D1 of the yarn 20. Therefore, by moving the light sensor 45 with the aid of the sensor moving device 60, the light sensor 45 can easily follow the change in the diameter of the cross-wound package 21. Furthermore, a structure can be adopted in which the moving range of the light sensor 45 can be moved from the surface of the cross-wound package 21 to the surface of the take-up bobbin 22. In this structure, the radius of the cross-wound package 21 can be detected, and therefore, the diameter can be calculated based on the size (length) of this radius.

[0072] The drive motor 61 is a stepper motor. Therefore, the position of the light sensor 45 can be reliably controlled with a simpler structure.

[0073] The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. For example, the optical sensor 45 is not limited to being configured to face the outer peripheral surface of the cross-wound package 21, but may also be configured to face the end face of the large diameter side or the end face of the small diameter side of the cross-wound package 21.

[0074] Sensor mobile devices are not limited to Figure 3The illustrated configuration (ball screw structure) is shown. For example, an electric cylinder mechanism, a pneumatic cylinder mechanism, or a solenoid mechanism can be used as the sensor moving device. In these cases, a light sensor 45 is mounted at the end of the electric cylinder, pneumatic cylinder, or solenoid. Alternatively, a crank-slider mechanism that converts the rotational motion of a crank into the reciprocating linear motion of a slider can be used, with the light sensor 45 mounted at the end of the slider. Alternatively, a belt-type traverse mechanism can be used, or a roller conveyor mechanism using a motor roller can be used. Alternatively, the light sensor 45 can be mounted above a linear guide, and moved by blowing compressed air or a fluid such as water. A vibrating mechanism, such as a parts feeder, can also be used to move the light sensor 45 using vibration.

[0075] The storage unit is not limited to storing the relationship between the diameter of the cross-wound package obtained by the package diameter acquisition unit and the indicated voltage and cause of yarn breakage in the tension application device. The storage unit may also store the relationship between the diameter of the cross-wound package obtained by the package diameter acquisition unit and other parameters related to yarn take-up in the yarn take-up machine. Examples of such parameters include tape diameter or unwinding speed.

[0076] In the unit control unit 50, the sensor drive control unit 59 may also be omitted. In the sensor moving device 60, the light sensor 45 may also move according to a predetermined moving schedule. In this case, the moving schedule may be, for example, the radial position of the light sensor corresponding to the elapsed time after the start of winding. Alternatively, the radial moving speed of the light sensor 45 may be set constantly or variably according to the elapsed time after the start of winding.

[0077] In addition to the control modes mentioned above, various other modes can be used. For example, a mode in which the speed is set manually can also be used. Alternatively, if there are many yarn breaks at the 130mm position, the machine control device 90 can manually input, for example, the position of the package diameter at which the unwinding speed is to be reduced as 130mm, and then the unwinding speed of the yarn layer at approximately 130 ± a few millimeters can be reduced.

[0078] Furthermore, it can be configured as a "pressure setting mode" to set the package pressure corresponding to the unwound yarn length (the diameter of the current cross-wound package 21). Thus, optimal pressure can be ensured even without actually measuring the diameter of the cross-wound package 21.

[0079] The present invention can also be applied to yarn take-up machines of different types than those described above. For example, not limited to the case where the cross-wound package is manually positioned at the lower end of the device, the present invention can also be applied to yarn take-up machines in which a cross-wound package to be unwound is positioned at one end of a swing arm having a horizontal axis of rotation, and a cross-wound package to be unwound is positioned at the other end of the swing arm. By rotating the swing arm, the next cross-wound package is positioned at a predetermined unwinding position. Furthermore, the present invention can also be applied to simplified yarn take-up machines that omit the splicer.

Claims

1. A yarn take-up machine, which unwinds and takes up yarn from a cross-wound package containing transversely moving yarn, the yarn take-up machine being characterized by comprising: The yarn feeding section maintains the cross-wound package; A light sensor, disposed on the side of the cross-wound package held by the yarn feeder, detects the yarn layers of the cross-wound package. A sensor moving device having a drive source that causes the optical sensor to move in a manner radially parallel to the cross-wound package held by the yarn feeder; A roll diameter acquisition unit acquires the diameter of the cross-wound roll based on detection information of the yarn layer detected by the optical sensor; and The winding speed control unit controls the winding speed of the yarn based on the diameter of the cross-wound package obtained by the package diameter acquisition unit.

2. The yarn winding machine according to claim 1, characterized in that, It also includes a sensor drive control unit, which controls the drive source of the sensor moving device based on the detection information of the yarn layer detected by the light sensor.

3. The yarn winding machine according to claim 1, characterized in that, It also has: A package diameter acquisition unit acquires the radial length change of the cross-wound package based on detection information of the yarn layer detected by the optical sensor; and The storage unit stores the relationship between the radial length of the cross-wound package obtained by the package diameter acquisition unit and the index related to the winding of the yarn in the yarn winding machine.

4. The yarn winding machine according to claim 2, characterized in that, It also has: A roll diameter acquisition unit acquires the radial length change of the cross-wound roll based on detection information of the yarn layer detected by the optical sensor; and The storage unit stores the relationship between the radial length of the cross-wound package obtained by the package diameter acquisition unit and the index related to the winding of the yarn in the yarn winding machine.

5. The yarn winding machine according to claim 3, characterized in that, It also includes: a tension applying device that applies tension to the yarn; and The indicator voltage acquisition unit acquires the indicator voltage in the tension application device as the indicator. The storage unit stores the relationship between the diameter of the cross-wound package obtained by the package diameter acquisition unit and the indicator voltage in the tension application device obtained by the indicator voltage acquisition unit.

6. The yarn winding machine according to claim 4, characterized in that, It also includes: a tension applying device that applies tension to the yarn; and The indicator voltage acquisition unit acquires the indicator voltage in the tension application device as the indicator. The storage unit stores the relationship between the diameter of the cross-wound package obtained by the package diameter acquisition unit and the indicator voltage in the tension application device obtained by the indicator voltage acquisition unit.

7. The yarn winding machine according to any one of claims 3 to 6, characterized in that, It also includes a cause estimation unit, which estimates the cause of yarn breakage as the indicator. The storage unit stores the relationship between the diameter of the cross-wound package obtained by the package diameter acquisition unit and the cause of yarn breakage estimated by the cause estimation unit.

8. The yarn winding machine according to any one of claims 1 to 6, characterized in that, The sensor moving device moves the optical sensor along a moving direction orthogonal to the direction of travel of the yarn.

9. The yarn winding machine according to claim 7, characterized in that, The sensor moving device moves the optical sensor along a moving direction orthogonal to the direction of travel of the yarn.

10. The yarn winding machine according to any one of claims 1 to 6 and 9, characterized in that, The driving source is a stepper motor.

11. The yarn winding machine according to claim 7, characterized in that, The driving source is a stepper motor.

12. The yarn winding machine according to claim 8, characterized in that, The driving source is a stepper motor.

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