JP2014218314A - Yarn winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn winder having a brake mechanism capable of stopping a package quickly and surely.SOLUTION: An automatic winder comprises: a package drive device; a contact roller; a brake device; a traverse device; and a unit control part. The package drive device rotates and drives a package formed by winding of a yarn. The contact roller contacts the package to be driven to rotate. The brake device decelerates the rotation speed of the contact roller. The traverse device is disposed independent of the contact roller, and traverses the yarn wound around the package. The unit control part controls the package drive device to decelerate the rotation speed of the package, and operates the brake device to decelerate the rotation speed of the package, and thereby stopping the rotation of the package.

Description

  The present invention relates to a configuration for stopping a package in a yarn winding machine that forms a package by winding a yarn.

  2. Description of the Related Art Conventionally, a yarn winding machine including a traverse device that traverses a yarn on a package surface by reciprocating a traverse guide is known. This type of yarn winding machine includes a contact roller that rotates in contact with the surface of the package in order to prevent the traverse from becoming unstable due to excessive swinging of the yarn.

  If yarn breakage occurs during winding of the package, the package is lifted up and the package moves away from the contact roller. Next, the rotation of the package and the contact roller is stopped, and the yarn catching member catches the yarn and the caught yarn is spliced. Patent documents 1 and 2 disclose a yarn winding machine provided with a mechanism for stopping rotation of a package and a contact roller.

  The yarn winding machine of Patent Document 1 includes a brake device incorporated in a winding drive device that drives a package as a mechanism for stopping the rotation of the package. Further, the yarn winding machine includes a brake device configured to bring the brake element into contact with the outer peripheral surface of the contact roller as a mechanism for stopping the rotation of the contact roller (clamp roller).

  The yarn winding machine disclosed in Patent Document 2 uses a winding bobbin driving motor that drives the package as a mechanism for stopping the rotation of the package. Further, the yarn winding machine includes a braking mechanism disposed inside the contact roller as a mechanism for stopping the rotation of the contact roller (driven roller).

  In Patent Documents 1 and 2, the brake device for stopping the rotation of the package is used only for the package. Moreover, the brake device for stopping the rotation of the contact roller is used only for the contact roller.

JP 2002-87699 A JP 2008-222378 A

  By the way, for example, when the package diameter is large and the weight of the package is heavy, the rotation of the package is difficult to stop due to inertia.

  For example, when the stop of rotation (reverse rotation) of the package is delayed at the time of yarn breakage, the yarn is pulled out too much, and the yarn may be loosened, resulting in yarn shrinkage. A portion where the yarn has slackened is monitored by the yarn monitoring device, so that it may be determined that a yarn defect has occurred, and the yarn may be cut by a cutter or the like.

  In addition, for example, when the package rotation (forward rotation) is delayed during doffing, the production efficiency is lowered.

  The objective of this invention is providing the yarn winding machine provided with the brake mechanism which can stop a package quickly and reliably.

Means and effects for solving the problems

  According to an aspect of the present invention, a yarn winding machine includes a drive device, a contact roller, a brake device, a traverse device, and a control unit. The driving device rotationally drives a package formed by winding a yarn. The contact roller contacts and rotates with the package. The brake device decelerates the rotation speed of the contact roller. The traverse device is provided independently of the contact roller and traverses the yarn wound around the package. The controller controls the driving device to reduce the rotational speed of the package, and operates the brake device to reduce the rotational speed of the package, thereby stopping the rotation of the package.

  Thereby, since the package is decelerated using not only the driving device but also the brake device for the contact roller, the rotation of the package can be stopped quickly and reliably. Therefore, the production efficiency of the package can be improved.

  In the yarn winding machine, the control unit preferably decelerates the package such that the operation of the brake device is transmitted to the package via the contact roller in contact with the package.

  As a result, the braking force of the brake device for the contact roller can be transmitted to the package, and the rotation of the package can be stopped.

  The yarn winding machine may further include a diameter acquisition unit that acquires diameter information of the package, and the control unit may operate the brake device based on the diameter information acquired by the diameter acquisition unit. preferable.

  Since the moment of inertia is different for different package diameters, the ease of stopping the rotation of the package is different. Therefore, the package can be surely stopped by operating the brake based on the diameter information.

  In the yarn winding machine, when the diameter information of the package acquired by the diameter acquisition unit is smaller than a reference value, the rotation of the package is stopped by controlling the driving device, and the diameter acquisition unit When the acquired diameter information of the package is equal to or larger than the reference value, it is preferable to stop the rotation of the package by controlling the driving device and operating the brake device.

  Thereby, when the diameter information (package diameter or the like) is small, the rotation of the package is easily stopped, so that the package can be stopped without using the brake device. On the other hand, since the rotation of the package is difficult to stop when the diameter information is large, the package can be reliably stopped by using the brake device together. By operating the brake device only when necessary as described above, wear of the brake device can be suppressed.

  The yarn winding machine further includes a detection unit that detects stoppage of the package. The control unit preferably operates the brake device when the detection unit detects that the package has not stopped after a predetermined time has elapsed.

  Thereby, a brake device can be operated as needed, omitting the process of acquiring and determining diameter information.

  In the yarn winding machine, when the control unit controls the driving device and stops the rotation of the package by operating the brake device, the control unit first controls the driving device to control the driving of the package. It is preferable to operate the brake device when the rotation is decelerated and the rotational speed of the package becomes a predetermined speed or less.

  As a result, the brake device comes into contact with the contact roller after the rotational speed of the package has slowed to some extent, so that it is possible to suppress wear of the brake device or generation of abnormal noise, or wear of the package surface.

  In the yarn winding machine, the control unit preferably releases the operation of the brake device after the rotation of the package is stopped.

  Thereby, for example, after the piecing is completed, the package can be rotated again.

  The yarn winding machine further includes a yarn supplying unit, a yarn catching member, and a yarn joining device. A yarn supplying bobbin around which the yarn wound around the package is wound is disposed in the yarn supplying portion. The yarn catching member catches the divided yarn when the yarn between the package and the yarn supplying unit is in a divided state. The yarn joining device joins the yarn captured by the yarn capturing member. When the yarn is caught by the yarn catching member, the control unit controls the driving device and activates the brake device before the yarn joining device performs the yarn joining operation, thereby rotating the package. Stop.

  Accordingly, the rotation of the package can be surely stopped before the yarn joining operation by the yarn joining device, so that the occurrence of slack in the yarn can be prevented. Therefore, it is possible to prevent the occurrence of yarn shrinkage and yarn breakage at the time of yarn joining.

  In the yarn winding machine, it is preferable that the brake device contacts at least a part of the outer peripheral surface of the contact roller to reduce the rotation speed of the contact roller.

  Accordingly, the rotation of the contact roller (package) can be stopped with a simple configuration.

  In the yarn winding machine, it is preferable that the driving device includes a motor and an inverter, and the control unit controls rotation of the motor via the inverter.

  As a result, the package can be rotated and stopped with a simple configuration. In addition, since the package brake need not be provided separately, the size of the yarn winding machine can be reduced.

The typical front view and block diagram of a yarn winding unit with which the automatic winder which concerns on one Embodiment of this invention is provided. The side view which shows the mode of the package vicinity. The flowchart which shows the process performed when a unit control part stops a package. The figure which shows notionally a mode that a package is stopped using a package drive device and the brake device for contact rollers. The flowchart which shows the process performed when the unit control part which concerns on a modification stops a package.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view and block diagram of a yarn winding unit (yarn winding machine) 10 provided in an automatic winder (yarn winding machine) according to the present embodiment. The automatic winder according to the present embodiment includes a yarn winding unit 10 arranged side by side. Further, the automatic winder of this embodiment includes a machine base control device (not shown) for centrally controlling the plurality of yarn winding units 10.

  Each yarn winding unit 10 unwinds the yarn 12 of the yarn supplying bobbin 11 and winds it on the winding bobbin 14. The winding bobbin 14 in a state where the yarn 12 is wound is referred to as a package 15. In the following description, the terms “upstream side” and “downstream side” refer to the upstream side and the downstream side when viewed in the traveling direction of the yarn 12, respectively. As shown in FIG. 1 and the like, in this embodiment, since the yarn 12 unwound from the yarn supplying bobbin 11 by the yarn supplying portion 16 is wound by the winding portion 17, the yarn supplying portion 16 side is the upstream side, The winding unit 17 side is downstream.

  Each yarn winding unit 10 includes a yarn supplying unit 16, a winding unit 17, and a unit control unit (control unit) 18.

  The unit control unit 18 includes, for example, a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), an input-output (I / O) port, and a communication port. Yes. A program for controlling each component of the yarn winding unit 10 is recorded in the ROM. The I / O port and the communication port are connected to each component (details will be described later) of the yarn winding unit 10 and the above-described machine base setting device, and the unit control unit 18 can communicate control information and the like. . Thereby, the unit control part 18 can control operation | movement of each part with which the yarn winding unit 10 is provided.

  The yarn supplying unit 16 can hold the yarn supplying bobbin 11 for supplying the yarn 12 in a predetermined position. The winding unit 17 can wind the yarn 12 supplied from the yarn supplying unit 16 while traversing (traversing) the outer periphery of the winding bobbin 14. Specifically, the winding unit 17 includes a cradle 19, a contact roller 20, and a traverse device 21.

  The cradle 19 can be rotated around a rotation shaft 55. The increase in the yarn layer diameter accompanying the winding of the yarn 12 onto the winding bobbin 14 can be absorbed by the rotation of the cradle 19. An angle sensor 56 for detecting the angle (rotation angle) of the cradle 19 is attached to the rotation shaft 55. The angle sensor 56 is composed of, for example, a rotary encoder, and transmits an angle signal corresponding to the angle of the cradle 19 to the diameter acquisition unit 57 of the unit control unit 18. The angle of the cradle 19 changes as the package 15 rolls up. By detecting the rotation angle of the cradle 19 by the angle sensor 56, the diameter acquisition unit 57 can acquire the package diameter (diameter information) of the package 15.

  The cradle 19 is provided with a pair of bearing centers 22 and 23. The bearing centers 22 and 23 are configured to be rotatable about the axis with respect to the cradle 19 and are arranged to face each other in the axial direction. The cradle 19 supports the winding bobbin 14 with the bearing centers 22 and 23 sandwiched from its axial direction. Thus, the package 15 can be supported by the cradle 19 so as to be rotatable around the axis.

  One of the pair of bearing centers 22 and 23 (in the case of FIG. 1, the bearing center 23) is connected to the rotation output shaft of the motor 24 a of the package driving device (driving device) 24 so as not to be relatively rotatable. The package driving device 24 includes a motor 24a and an inverter 24b. By rotating the package driving device 24 (motor 24a) with the package 15 held between the bearing centers 22 and 23, the package 15 can be directly rotated.

  The yarn winding unit 10 includes a package drive control unit 25 that controls the operation of the package drive device 24. The unit control unit 18 transmits a command value of the rotation frequency (the number of rotations per unit time) of the package drive device 24 (motor 24a) to the package drive control unit 25. The package drive control unit 25 instructs the rotation frequency specified by the command value. The inverter 24b rotationally drives the motor 24a at the instructed rotational frequency. Thereby, the package 15 can be rotated at a desired rotation frequency. The package drive control unit 25 can increase and decrease (decelerate) the rotational speed of the package 15.

  The cradle 19 is provided with a package rotation sensor 26 for detecting the rotation of the package 15. The package rotation sensor 26 is configured, for example, as an incremental rotary encoder, and each time the bearing center 22 rotates by a predetermined angle (that is, every time the package 15 rotates by a predetermined angle), a pulse signal is transmitted to the unit controller 18. Send to. The unit controller 18 can detect how much the package 15 has rotated based on the pulse signal received from the package rotation sensor 26.

  The traverse device 21 is disposed in the vicinity of the cradle 19. The traverse device 21 is configured as an arm type traverse device. The traverse arm 28 is fixed to the drive shaft of the traverse drive motor 29. The traverse drive motor 29 is for turning the traverse arm 28 and is constituted by a servo motor or the like. By traversing and traversing the traverse arm 28 by the traverse drive motor 29, the yarn guide 27 at the tip of the traverse arm 28 can be driven to reciprocate in the traverse width direction (left-right direction in FIG. 1).

  A contact roller 20 is disposed in the vicinity of the cradle 19. The contact roller 20 is configured to be able to be driven and rotated by contacting the outer peripheral surface of the package 15. As shown in FIG. 2A, the contact roller 20 is disposed so as to contact the yarn 12 wound around the package 15. Thus, by winding the yarn 12 around the package 15 while making contact with the contact roller 20, the trajectory of the yarn 12 is stabilized, so that the yarn guide 27 can prevent the yarn 12 from being excessively swung.

  A brake device 59 is disposed in the vicinity of the contact roller 20. As shown in FIG. 4 described later, the brake device 59 includes a rod-like movable member 59a and a brake pad 59b attached to the tip of the movable member 59a. When the package 15 is lifted up and separated from the contact roller 20, the contact roller 20 continues to rotate due to inertia, but the movable member 59 a is moved (rotated) to bring the brake pad 59 b to the outer peripheral surface of the contact roller 20. By pressing (contacting), the rotation of the contact roller 20 can be stopped. Although the method of moving the movable member 59a is arbitrary, a cylinder, a solenoid, etc. can be used, for example.

  While the package 15 is rotated in the winding direction by the winding unit 17 configured as described above, the yarn 12 is reciprocated within the traverse width by the traverse device 21, thereby traversing the yarn 12 and the package 15. Can be wound on the surface of

  The yarn winding unit 10 includes, in order from the yarn supplying unit 16 between the yarn supplying unit 16 and the winding unit 17, a unwinding assisting device 35, a tension applying device 36, a yarn joining device 37, and a yarn monitoring device. 38 is arranged.

  The unwinding assisting device 35 includes a regulating member 39 that can be put on the core tube of the yarn feeding bobbin 11. The restricting member 39 is configured in a substantially cylindrical shape, and is disposed so as to contact a balloon formed on the yarn layer of the yarn feeding bobbin 11. The balloon refers to a portion where the yarn 12 unwound from the yarn feeding bobbin 11 is swung by centrifugal force. By bringing the regulating member 39 into contact with the balloon, tension is applied to the yarn 12 of the balloon portion, and the yarn 12 is prevented from being swung excessively. Thereby, the yarn 12 can be appropriately unwound from the yarn supplying bobbin 11.

  The tension applying device 36 applies a predetermined tension to the traveling yarn 12. In this embodiment, the tension applying device 36 is configured by a gate type device in which movable comb teeth are arranged with respect to fixed comb teeth. The movable comb teeth are biased so that the comb teeth are engaged with each other. By passing the yarn 12 while bending the interdigitated comb teeth, an appropriate tension can be applied to the yarn 12 and the quality of the package 15 can be improved. The tension applying device 36 is not limited to the gate type, but may be a disk type, for example.

  The yarn monitoring device 38 monitors the quality of the traveling yarn 12. Specifically, the yarn monitoring device 38 includes a clearer head 40 including a light transmission type sensor that detects the thickness of the yarn 12, and an analyzer 41 that processes a yarn thickness signal from the sensor. . The yarn monitoring device 38 detects a yarn defect (location where there is an abnormality in the yarn 12) included in the yarn 12 by monitoring the yarn thickness signal from the sensor with the analyzer 41. A cutter 42 is provided immediately upstream of the clearer head 40 to cut the yarn 12 immediately when the yarn monitoring device 38 detects a yarn defect. The yarn monitoring device 38 is not limited to the light transmission type sensor, and may be configured to monitor the yarn 12 using, for example, a light reflection type sensor or a capacitance type sensor.

  The yarn joining device 37 joins the lower yarn on the yarn feeding bobbin 11 and the upper yarn on the package 15 side when the yarn 12 between the yarn feeding bobbin 11 and the package 15 is in a divided state for some reason. (Thread splicing) In the present embodiment, the yarn joining device 37 is configured as a splicer device that twists yarn ends together by a swirling air flow generated by compressed air. However, the yarn splicing device 37 is not limited to a pneumatic splicer device, and for example, a mechanical knotter or the like can be employed.

  A lower yarn catching member (yarn catching member) 45 that catches the yarn end on the yarn feeding bobbin 11 side and guides it to the yarn joining device 37 below and above the yarn joining device 37, and FIG. Thus, an upper thread catching member (yarn catching member) 46 that catches the yarn end on the package 15 side and guides it to the yarn joining device 37 is provided. The lower thread catching member 45 includes a lower thread pipe arm 47 and a lower thread suction port 48 formed at the tip of the lower thread pipe arm 47. The upper thread catching member 46 includes an upper thread pipe arm 49 and an upper thread suction port 50 formed at the tip of the upper thread pipe arm 49.

  The lower thread pipe arm 47 and the upper thread pipe arm 49 are configured to be rotatable about a shaft 51 and a shaft 52, respectively. Appropriate negative pressure sources (not shown) are connected to the lower thread pipe arm 47 and the upper thread pipe arm 49, respectively. As a result, the lower thread pipe arm 47 and the upper thread pipe arm 49 can generate suction flows at the lower thread suction port 48 and the upper thread suction port 50 to suck and capture the thread ends of the upper thread and the lower thread.

  Next, a process for stopping the rotation of the package 15 will be described.

  There are various situations in which the rotation of the package 15 winding the yarn 12 is stopped. For example, when the package 15 becomes full, the unit control unit 18 stops the rotation of the full package 15 (forward rotation) in order to remove (dive) the package 15 from the winding unit 17. Stop from).

  Further, the unit control unit 18 detects the yarn 12 when the yarn 12 between the yarn feeding bobbin 11 and the package 15 is cut, or when the yarn defect is detected by the yarn monitoring device 38 and the yarn 12 is cut. After winding up, the rotation of the package 15 is temporarily stopped (stop from the normal rotation). After that, the unit controller 18 causes the upper yarn catching member 46 to catch the yarn end on the package 15 side, and then reversely rotates the package 15 to pull out the yarn 12 while completing the guidance of the yarn 12 to the yarn joining device 37. Later, the package 15 is stopped (stop from reverse rotation).

  The unit control unit 18 performs the process shown in the flowchart of FIG. 3 when stopping the forward rotation or the reverse rotation of the package 15. The unit control unit 18 determines whether or not there is a request (stop request) to stop the rotation of the package 15 while performing the forward or reverse rotation control of the package 15 (step S101).

  When the unit control unit 18 detects a full request, a yarn breakage, a yarn defect, or a stop request issued in accordance with the guide status of the yarn 12 to the yarn joining device 37, the package control unit 25 Control is performed to reduce the rotational speed of the driving device 24 (that is, the rotational speed of the package 15) (step S103). The unit control unit 18 determines whether or not the rotational speed of the package 15 is equal to or lower than a predetermined speed (step S104), and reduces the rotational speed of the package 15 until the rotational speed becomes equal to or lower than the predetermined speed. “Deceleration” in FIG. 4 shows the situation at this time.

  The unit controller 18 lifts the package 15 away from the contact roller 20 before and after step S103. Thereby, it can prevent that the quality of the package 15 falls by abrasion with the contact roller 20. FIG. Further, since the contact roller 20 after being separated continues to rotate, the unit controller 18 stops the rotation of the contact roller 20 by operating the brake device 59. The lift-up of the package 15 is performed in order to prevent deterioration of the quality of the package 15 due to wear with the contact roller 20. Therefore, it is preferable to lift up the package 15 before step S103.

  When the rotational speed of the package 15 becomes equal to or lower than the predetermined speed, the unit controller 18 determines whether or not the package diameter of the package 15 is equal to or larger than a predetermined reference value (Step S105). If the package diameter of the package 15 is less than the reference value, the unit controller 18 stops the package 15 under the control of the package driving device 24 without operating a brake device 59 described later.

  If the package diameter of the package 15 is equal to or larger than the reference value, the unit controller 18 reduces the rotational speed of the package 15 by the brake device 59 (step S106). Specifically, the unit controller 18 first releases the lift-up of the package 15 and brings the package 15 into contact with the contact roller 20. Next, the unit controller 18 moves the movable member 59 a to press the brake pad 59 b against the outer peripheral surface of the contact roller 20 as shown in “Just before stopping” in FIG. 4. Thereby, since the braking force to the contact roller 20 by the brake device 59 can be transmitted to the package 15, the rotational speed of the package 15 can be decelerated.

  The unit controller 18 counts the time (brake time) when the brake device 59 is operated, and determines whether or not the brake time has passed the reference time (step S107). When the brake time has passed the reference time, the unit controller 18 restores the position of the movable member 59a and separates the brake pad 59b from the contact roller 20, thereby releasing the operation of the brake device 59 (step S108). ). “Stopped” in FIG. 4 shows the situation at this time.

  The unit control unit 18 stops the package 15 by performing the above processing. Thereafter, the unit controller 18 performs processing such as doffing or yarn splicing.

  If the reverse rotation of the package 15 is continued even after the start of the yarn splicing by the yarn splicing device 37, the slack of the yarn 12 occurs, causing the yarn to shrink or break. Therefore, the unit control unit 18 of the present embodiment prevents the slack of the yarn 12 by controlling at least one of the timing for operating the brake device 59 and the timing for starting the yarn splicing of the yarn splicing device 37. .

  For example, when the time from when the yarn end of the package 15 is caught by the upper yarn catching member 46 to when the yarn joining by the yarn joining device 37 is determined is determined, the package 15 is surely stopped within this time. The brake device 59 is activated. In addition, when the timing at which the yarn joining by the yarn joining device 37 is variable, the yarn joining by the yarn joining device 37 is executed after the operation of the brake device 59 is released.

  As a result, yarn shrinkage and yarn breakage during reverse rotation of the package 15 can be prevented. Further, when the package 15 is rotated forward and backward, the package 15 can be quickly stopped, so that production efficiency can be improved.

  Next, a modification of the above embodiment will be described. FIG. 5 is a flowchart illustrating processing performed when the unit control unit 18 according to the modification stops the package 15. Note that step S201 to step S203, step S206, and step S208 in the flowchart of this modification are the same as those in the above-described embodiment, and thus detailed description thereof is omitted.

  The unit controller 18 of the above embodiment determines whether or not the brake device 59 is activated based on the package diameter of the package 15. On the other hand, the unit control unit 18 of this modification waits for a predetermined time after the start of deceleration under the control of the package driving device 24 (step S204), and then determines whether the package 15 is still rotating. (Step S205). Specifically, the unit control unit 18 determines whether or not the package 15 is still rotating based on the detection result input from the package rotation sensor 26. Therefore, in the present embodiment, the package rotation sensor 26 and the unit control unit 18 correspond to the “detection unit that detects the stop of the package”. And the unit control part 18 operates the brake device 59, when the package 15 is still rotating (step S206).

  Moreover, the unit control part 18 of the said embodiment cancels | releases the action | operation of the brake device 59, when brake time passes reference time. On the other hand, the unit controller 18 of this modification determines whether or not the rotation of the package 15 has stopped (step S207), and releases the operation of the brake device 59 when the rotation of the package 15 has stopped. (Step S208). Whether or not the rotation of the package 15 has stopped in step S207 is determined by the package rotation sensor 26 and the unit controller 18 as in step S205.

  In the above embodiment, the operation of the brake device 59 may be released based on the stop of the rotation of the package 15 by applying the process of step S207. In the present modification, the operation of the brake device 59 may be released based on the brake time by applying the process of step S107.

  As described above, the yarn winding unit 10 includes the package driving device 24, the contact roller 20, the brake device 59, the traverse device 21, and the unit control unit 18. The package driving device 24 rotationally drives the package 15 formed by winding the yarn 12. The contact roller 20 comes into contact with the package 15 and rotates. The brake device 59 decelerates the rotation speed of the contact roller 20. The traverse device 21 is provided independently of the contact roller 20 and traverses the yarn 12 wound around the package 15. The unit controller 18 controls the package driving device 24 to reduce the rotational speed of the package 15 and operates the brake device 59 to reduce the rotational speed of the package 15 to stop the rotation of the package 15.

  Thereby, since the package 15 is decelerated using not only the package driving device 24 but also the brake device 59 for the contact roller 20, the rotation of the package 15 can be stopped quickly and reliably. Therefore, the production efficiency of the package 15 can be improved.

  When the package diameter acquired by the diameter acquisition unit 57 is smaller than the reference value, the above-described yarn winding unit 10 controls the package driving device 24 to stop the rotation of the package 15 so that the package diameter is equal to or larger than the reference value. If so, the rotation of the package 15 is stopped by controlling the package driving device 24 and the brake device 59.

  Thereby, when the package diameter is small, the rotation of the package 15 is likely to stop, so that the package 15 can be stopped without using the brake device 59. On the other hand, since the rotation of the package 15 is difficult to stop when the package diameter is large, the package 15 can be reliably stopped by using the brake device 59 in combination. By operating the brake device 59 only when necessary as described above, wear of the brake device 59 can be suppressed.

  The above-described yarn winding unit 10 further includes a detection unit (the package rotation sensor 26 and the unit control unit 18) that detects the stop of the package. When the unit controller 18 detects that the package 15 is not stopped after a predetermined time has elapsed, the unit controller 18 operates the brake device 59.

  Thereby, the brake device 59 can be operated as necessary while omitting the process of acquiring and determining the diameter information.

  When the unit controller 18 stops the rotation of the package 15 by controlling the package driving device 24 and the brake device 59, the unit control unit 18 first controls the package driving device 24 to decelerate the rotation of the package 15. When the rotational speed becomes a predetermined speed or less, the brake device 59 is operated.

  As a result, the brake device 59 comes into contact with the contact roller 20 after the rotational speed of the package 15 has slowed to some extent, so that it is possible to suppress wear of the brake device 59 or generation of abnormal noise or wear of the surface of the package 15.

  The yarn winding unit 10 further includes a yarn supplying unit 16, a lower yarn catching member 45 and an upper yarn catching member 46, and a yarn joining device 37. In the yarn supplying section 16, a yarn supplying bobbin 11 around which the yarn 12 taken up by the package 15 is wound is disposed. The lower yarn catching member 45 and the upper yarn catching member 46 catch the divided yarn 12 when the yarn 12 between the package 15 and the yarn supplying unit 16 is in a divided state. The yarn joining device 37 joins the yarn 12 captured by the lower thread capturing member 45 and the upper thread capturing member 46. When the yarn 12 is caught by the lower yarn catching member 45 and the upper yarn catching member 46, the unit control unit 18 controls the package driving device 24 and the brake device 59 before the yarn joining device 37 performs the yarn joining operation. The reverse rotation of the package 15 is stopped.

  Thereby, since the rotation of the package 15 can be surely stopped before the yarn joining operation by the yarn joining device 37, the occurrence of loosening of the yarn 12 can be prevented. Therefore, it is possible to prevent the occurrence of yarn shrinkage and yarn breakage at the time of yarn joining.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  In the above description, when there is a stop request, the package 15 is lifted up and separated from the contact roller 20. However, for example, if the rotational speed of the package 15 is slow and the quality of the package 15 does not deteriorate during reverse rotation, the lift-up can be omitted.

  In the above description, the package diameter is obtained based on the detection result of the angle sensor 56, but other than that, for example, it can be obtained by the following three methods. In the first method, the package diameter is obtained based on the total length of the yarn 12 wound around the package 15, the winding speed of the yarn 12, and the yarn type (yarn thickness, etc.). The second method is a method of obtaining the package diameter by measuring the time from the start of winding of the yarn 12. Specifically, when the winding speed and yarn type (yarn thickness, etc.) are known, the relationship between the elapsed time from the start of winding the yarn 12 and the package diameter is stored in the unit control unit 18 in advance. Thus, the package diameter can be obtained based on the elapsed time. When winding is interrupted at the time of yarn cutting or yarn splicing operation, the measurement of the elapsed time from the start of winding is interrupted. The third method is a method for obtaining the package diameter based on the traveling speed of the yarn 12. Specifically, the yarn monitoring device 38 or a dedicated yarn speed sensor is provided to determine the traveling speed of the yarn 12. The unit controller 18 calculates the traverse angle based on the traveling speed of the yarn 12 and the traverse speed. Further, the peripheral speed of the package 15 is obtained based on the traverse angle and the yarn traveling speed. Then, the package diameter is calculated based on the rotational speed of the package 15 and the peripheral speed of the package 15.

  In the above description, the package diameter is given as an example of the diameter information. However, if the information is related to the package diameter and the value increases as the winding progresses, the yarn layer thickness is not limited to the package diameter. The wound length, weight, etc. can be used. For example, the wound length can be obtained by a yarn traveling sensor that detects the length of the wound yarn 12. Further, for example, the yarn layer thickness or weight can be obtained based on the wound length and the yarn type.

  The flowchart described above is an example, and the process may be changed, added, or deleted. For example, if the quality of the package 15 does not deteriorate, the process of determining the current package diameter may be omitted and the package 15 may be stopped quickly.

  In the above description, the brake device 59 is provided outside the contact roller 20 and makes the brake pad 59b contact the outer peripheral surface of the contact roller 20. However, the brake device may be provided inside the contact roller 20 as in Patent Document 2 or may be configured such that an appropriate member is brought into contact with the inner surface of the contact roller 20.

  In the above description, the brake device 59 is operated after the lift-up of the package 15 is released, but it may be operated at the following timing. When the package 15 is decelerated and stopped, the brake device 59 is operated while the package 15 is lifted up, and the lift-up of the package 15 is released while the brake device 59 is operated to contact the contact roller 20. The rotation of the package 15 is stopped.

  The traverse device 21 is not limited to an arm-type traverse device, and may be, for example, a belt-type traverse device or a blade-type traverse device.

  In the above description, the package drive control unit 25 and the traverse control unit 31 are provided separately from the unit control unit 18, respectively. However, at least one of the package drive control unit 25 and the traverse control unit 31 may be provided in the unit control unit 18.

  The configuration of the present invention is not limited to a yarn winding machine constituted by one yarn winding unit 10 or a yarn winding machine (automatic winder) constituted by a plurality of yarn winding units 10, for example, a rewinding machine, a fine spinning machine (pneumatic spinning) The present invention can also be widely applied to other yarn winding machines such as a machine and an open-end spinning machine.

10 Yarn winding unit (yarn winding machine)
12 Thread 15 Package 16 Yarn feeding section 17 Winding section 18 Unit control section (control section)
19 Cradle 20 Contact Roller 21 Traverse Device 24 Package Drive Device (Drive Device)
24a Motor 24b Inverter 25 Package drive controller 37 Yarn splicing device 45 Lower thread catching member (yarn catching member)
46 Upper thread catching member (yarn catching member)
57 Diameter acquisition unit 59 Brake device

Claims (10)

A driving device for rotationally driving a package formed by winding a yarn;
A contact roller that contacts and rotates with the package;
A brake device for reducing the rotational speed of the contact roller;
A traverse device that is provided independently of the contact roller and traverses the yarn wound around the package;
A controller that controls the driving device to reduce the rotational speed of the package, and operates the brake device to reduce the rotational speed of the package, thereby stopping the rotation of the package;
A yarn winding machine comprising: The yarn winding machine according to claim 1,
The control unit decelerates the package so that the operation of the brake device is transmitted to the package via the contact roller in contact with the package. The yarn winding machine according to claim 1 or 2,
A diameter acquisition unit for acquiring diameter information of the package;
The said control part operates the said brake device based on the said diameter information which the said diameter acquisition part acquired, The yarn winding machine characterized by the above-mentioned. A yarn winding machine according to claim 3,
The controller is
When the diameter information of the package acquired by the diameter acquisition unit is smaller than a reference value, the rotation of the package is stopped by controlling the driving device,
When the diameter information of the package acquired by the diameter acquisition unit is greater than or equal to the reference value, the rotation of the package is stopped by controlling the driving device and operating the brake device. Yarn winding machine. The yarn winding machine according to claim 1 or 2,
A detection unit for detecting a stop of the package;
The yarn winding machine, wherein the control unit activates the brake device when the detection unit detects that the package is not stopped after a predetermined time has elapsed. A yarn winding machine according to any one of claims 1 to 5,
When the control unit controls the driving device and operates the brake device to stop the rotation of the package, the control unit first controls the driving device to decelerate the rotation of the package, The yarn winding machine, wherein the brake device is operated when a rotation speed becomes a predetermined speed or less. A yarn winding machine according to any one of claims 1 to 6,
The control unit releases the operation of the brake device after the rotation of the package is stopped. A yarn winding machine according to any one of claims 1 to 7,
A yarn supplying portion in which a yarn supplying bobbin around which the yarn wound around the package is wound is disposed;
When the yarn between the package and the yarn supplying unit is in a divided state, a yarn catching member that catches the separated yarn;
A yarn joining device that joins the yarn captured by the yarn capturing member;
Further comprising
When the yarn is caught by the yarn catching member, the control unit controls the driving device and activates the brake device before the yarn joining device performs the yarn joining operation, thereby rotating the package. A yarn winding machine characterized by stopping the thread. A yarn winding machine according to any one of claims 1 to 8,
The yarn winding machine, wherein the brake device contacts at least a part of the outer peripheral surface of the contact roller to reduce the rotational speed of the contact roller. A yarn winding machine according to any one of claims 1 to 9,
The drive device
A motor,
An inverter;
Have
The control unit controls the rotation of the motor through the inverter.

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