JP2010037083A - Yarn winding machine and automatic winder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a constitution capable of efficiently stopping the rotation of a package in a yarn winding machine and preventing a winding bobbin even from being damaged. <P>SOLUTION: A winder unit 10 possessed by an automatic winder has a cradle 23 and a package brake mechanism 81. The cradle 23 supports the package 30 for winding supplied yarn 20. The package brake mechanism 81 is provided in the cradle 23, and can brake the rotation of the package 30. A brake control part 52 of a unit control part 50 stops the rotation of the package 30 by alternately repeating braking strengthening control and weakening control of the package brake mechanism 81 to the rotation of the package 30. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a yarn winding machine that winds a yarn to form a package. In detail, it is related with the structure for stopping the package currently rotating in the said yarn winding machine.

  This type of yarn winding machine is disclosed in Patent Document 1, for example. The winding unit provided in the automatic winder of Patent Document 1 is configured to wind a yarn by rotating a paper tube (winding bobbin) supported by a cradle in contact with a traverse drum. An air cylinder is connected to the cradle, and by driving the air cylinder, the winding tube or the package is brought into contact with the traverse drum and positioned away from the traverse drum. Yes.

  The cradle of Patent Document 1 has a pair of bearing centers that are inserted and fitted to both ends of the paper tube. One of the pair of bearing centers is provided with a package brake as a brake device for braking the rotation of the paper tube. This package brake also serves as a pressing means for pressing the bearing center into the paper tube. When the solenoid valve for air supply control is opened and pressurized air is supplied to the cylinder of the package brake, the bearing center is pushed into the paper tube and the rotation of the bearing center is braked by frictional force. .

With this configuration, in the doffing operation when the winding unit being wound is full, the air cylinder extends the piston rod to raise the cradle and separate the fully wound package from the traverse drum. . At this time, the brake by the package brake is applied, the rotation of the package is stopped, and the yarn is prevented from loosening.
Japanese Patent No. 2940476

  In the automatic winder as shown in Patent Document 1, it is sometimes necessary to stop the rotation of the package not only for the above-described doffing operation but also for the yarn splicing operation when a yarn breakage occurs, for example. This thread breakage or the like can occur at various timings from the initial stage when winding the thread around an empty paper tube to the final stage when the package is sufficiently wound.

  In the configuration of Patent Document 1, since the bearing center is pressed against the paper tube when the package brake is operated, when the inertia of rotation is large (for example, when a thick package is rotating at high speed), the paper tube is the bearing. It is considered that the rotation can be braked while effectively preventing idling with respect to the center. However, when the inertia of rotation is small (when a package with a small winding diameter is rotating at a low speed), the possibility of the paper tube idling as described above is low, and the bearing center is pushed into the paper tube with a strong force. In some cases, the paper tube may be damaged or deformed, making it unusable.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a configuration capable of efficiently stopping the rotation of the package in the yarn winding machine and preventing damage to the winding bobbin. is there.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to an aspect of the present invention, a yarn winding machine having the following configuration is provided. That is, the yarn winding machine includes a cradle, a brake unit, and a brake control unit. The cradle supports a package for winding the supplied yarn. The brake unit is provided in the cradle and can brake the rotation of the package. The brake control unit stops rotation of the package by alternately repeating control for increasing and decreasing braking of the package by the brake unit.

  With this configuration, since strong braking is intermittently applied to the package, the rotation of the package can be effectively decelerated and stopped quickly in a short time. Thereby, the productivity of the package can be increased.

  The yarn winding machine preferably has the following configuration. That is, the yarn winding machine includes a contact rotating body, a separation unit, and a separation control unit. The contact rotating body can rotate in contact with the peripheral surface of the package. The separation portion can move the cradle in a direction in which the package is separated from the contact rotating body. The separation control unit can perform movement control of the cradle by the separation unit independently of braking control of the package by the brake control unit.

  With this configuration, braking against the rotation of the package and separation of the package from the contact rotating body can be controlled separately. Therefore, it is possible to easily perform control to increase or decrease braking against rotation of the package while maintaining the state where the package is separated from the contact rotating body.

  The yarn winding machine preferably has the following configuration. That is, the contact rotating body is a take-up drum that rotationally drives the package by rotating in contact with the peripheral surface of the package. The brake control unit controls the brake unit so that the rotational speed of the package becomes zero substantially simultaneously with or before the rotational speed of the winding drum becomes zero.

  With this configuration, the rotation of the package can be stopped in time for stopping the rotation of the winding drum, so that the next operation can be quickly performed and the productivity of the package can be increased.

  The yarn winding machine preferably has the following configuration. That is, the cradle includes a pair of rotating holders that can be fitted with axial ends of a winding bobbin for winding the yarn. The brake portion applies a braking force to rotation of at least one of the pair of rotating holders and pushes the rotating holder in a direction that strengthens frictional coupling between the rotating holder and the winding bobbin. It is comprised so that a pressure may act. The brake control unit changes the braking force and the pressing force according to at least one of a winding diameter and a winding speed of the package.

  With this configuration, the braking force and the pressing force are changed according to the magnitude of the rotational inertia of the package, so that the winding bobbin can be prevented from idling and the rotation of the package can be effectively stopped in a short time. Damage can be prevented. In addition, since the control for increasing and decreasing the braking against the rotation of the package is alternately repeated, it is possible to prevent a strong pressing force from being constantly applied to the winding bobbin and to suppress damage to the winding bobbin, and to reduce the braking force and the pressing force. The effective magnitude of the pressure can be easily changed by control variations.

  According to another aspect of the present invention, there is provided an automatic winder as the yarn winding machine.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a winder unit 10 included in an automatic winder as a yarn winding machine according to an embodiment of the present invention.

  The winder unit 10 shown in FIG. 1 winds a yarn 20 unwound from a yarn feeding bobbin 21 around a winding bobbin (paper tube, winding tube) 22 while traversing to form a package 30 having a predetermined length and a predetermined shape. Is. The automatic winder (yarn winding machine) of this embodiment includes a plurality of winder units 10 arranged side by side and a machine control device (not shown).

  Each winder unit 10 includes a winding unit main body 16 and a unit control unit (control unit) 50.

  The unit controller 50 includes, for example, a CPU, a RAM, a ROM, and an I / O port. A program for controlling each component of the winding unit main body 16 is recorded in the ROM. Further, the machine control device is connected to the I / O port. With the above configuration, the operator can manage or control the plurality of winder units 10 collectively by appropriately operating the machine base control device.

  The winding unit main body 16 includes a cradle 23 configured to hold the winding bobbin 22. The winding unit body 16 is provided with a traverse drum (winding drum, contact rotating body) 24 for traversing the yarn 20 and rotating the winding bobbin 22. A spiral traverse groove 27 is formed on the outer peripheral surface of the traverse drum 24, and the yarn 20 is wound around the winding bobbin 22 while being traversed by the traverse groove 27 with a certain width. Thereby, the package 30 having a certain winding width can be formed.

  The winding unit main body 16 includes, in the yarn traveling path between the yarn feeding bobbin 21 and the traverse drum 24, in order from the yarn feeding bobbin 21 side, the unwinding auxiliary device 12, the tension applying device 13, and the splicer device. 14 and a clearer (yarn quality measuring device) 15 are arranged.

  The unwinding assisting device 12 lowers the yarn from the yarn supplying bobbin 21 by lowering the regulating member 40 covering the core pipe of the yarn supplying bobbin 21 in conjunction with the yarn unwinding from the yarn supplying bobbin 21. It is to assist. The regulating member 40 contacts the balloon formed on the upper portion of the yarn feeding bobbin 21 by the rotation and centrifugal force of the yarn unwound from the yarn feeding bobbin 21, and applies the appropriate tension to the balloon to release the yarn. Assist the moth. A sensor (not shown) for detecting the chase portion of the yarn feeding bobbin 21 is provided in the vicinity of the regulating member 40. When this sensor detects the descent of the chase portion, the control is performed so that the restricting member 40 is lowered by, for example, an air cylinder (not shown).

  The tension applying device 13 applies a predetermined tension to the traveling yarn 20. As the tension applying device 13, for example, a gate-type device in which movable comb teeth 37 are arranged with respect to fixed comb teeth 36 can be used. The movable comb teeth 37 can be rotated by, for example, a solenoid 38 configured in a rotary manner so that the comb teeth are in a meshed state or a released state. The tension applying device 13 can apply a certain tension to the wound yarn 20 to improve the quality of the package 30. In addition to the gate type, for example, a disk type can be adopted as the tension applying device 13.

  The splicer device 14 detects the lower thread on the yarn feeding bobbin 21 and the package 30 side when the clearer 15 detects a yarn defect and performs yarn cutting or when the yarn breakage occurs during unwinding from the yarn feeding bobbin 21. The upper thread is spliced. As a yarn joining device for joining such an upper yarn and a lower yarn, a mechanical device, a device using a fluid such as compressed air, or the like can be used.

  The clearer 15 includes a clearer head 49 in which a sensor (not shown) for detecting the thickness of the yarn 20 is disposed, and an analyzer 47 that processes a yarn thickness signal from the sensor. The clearer 15 is configured to detect a yarn defect such as a slab by monitoring a yarn thickness signal from the sensor. In the vicinity of the clearer head 49, a cutter 39 for cutting the yarn 20 immediately when the clearer 15 detects a yarn defect is provided.

  On the lower side and the upper side of the splicer device 14, the lower yarn guide pipe 25 that catches the lower yarn on the yarn feeding bobbin 21 and guides it to the splicer device 14, and the upper yarn on the package 30 side is caught. And an upper thread guide pipe 26 for guiding the upper thread. Further, the lower thread guide pipe 25 and the upper thread guide pipe 26 are configured to be rotatable about shafts 33 and 35, respectively. A suction port 32 is formed at the tip of the lower thread guide pipe 25, and a suction mouth (thread end catching means) 34 is provided at the tip of the upper thread guide pipe 26. Appropriate negative pressure sources are connected to the lower thread guide pipe 25 and the upper thread guide pipe 26, respectively, and a suction flow is generated in the suction port 32 and the suction mouth 34 so that the thread ends of the upper thread and the lower thread are moved. It is comprised so that aspiration capture | acquisition can be carried out.

  Next, the configuration of the cradle 23 will be described in detail.

  The cradle 23 includes a pair of cradle arms 61 and 62. The cradle arms 61 and 62 are supported so as to be rotatable about the hinge shaft 48, and can be rotated and moved in a direction toward or away from the traverse drum 24.

  Rotating holders 63 and 64 are rotatably attached to the tips of the pair of cradle arms 61 and 62, respectively. The rotary holders 63 and 64 are arranged so as to face each other, and can be mounted so that the winding bobbin 22 is sandwiched between the two rotary holders 63 and 64. When the take-up bobbin 22 is attached to the cradle 23, the rotary holders 63 and 64 are fitted to the end of the take-up bobbin 22 in the axial direction, and can be rotated integrally by a frictional force. In the present embodiment, the cradle 23 is configured so that a cone type winding bobbin 22 can be mounted, and the small diameter side is attached to the rotating holder 63 and the large diameter side is attached to the rotating holder 64.

  The winding unit main body 16 includes a lift-up mechanism (separating portion) 71 for moving the cradle 23 to separate the package 30 from the traverse drum 24. The lift-up mechanism 71 includes a lift-up cylinder (actuator) 72 driven by air pressure, and an electromagnetic valve 73 for switching supply / stop of compressed air to the lift-up cylinder 72.

  The cylinder rod of the lift-up cylinder 72 is connected to the cradle arm 62 on one side. When the lift-up cylinder 72 is driven to extend, the cradle 23 is rotated in a direction to separate the package 30 from the traverse drum 24. (See FIG. 2). The electromagnetic valve 73 is electrically connected to the unit controller 50, and the unit controller 50 (a lift-up controller 51 described later) sends a lift-up signal to the electromagnetic valve 73 to drive the lift-up cylinder 72. Can be controlled.

  A package brake mechanism (brake part) 81 for braking the rotation of the package 30 is provided at the tip of the cradle arm 62 on one side. The package brake mechanism 81 includes a piston housing 82, a brake piston 83, and an electromagnetic valve 84.

  The piston housing 82 is built in the tip of the cradle arm 62, and the brake piston 83 is fitted in the piston housing 82 in an airtight manner. The brake piston 83 is non-rotatably attached to the piston housing 82, and the rotary holder 64 is rotatably supported by the brake piston 83.

  The electromagnetic valve 84 is configured to be able to switch supply / stop of compressed air to the internal space of the piston housing 82. The electromagnetic valve 84 is electrically connected to the unit control unit 50, and the unit control unit 50 (a brake control unit 52 described later) sends a brake signal to the electromagnetic valve 84 to control the drive of the brake piston 83. Can do.

  With this configuration, the rotation holder 64 can freely rotate with respect to the brake piston 83 in a state where compressed air is not supplied into the piston housing 82. On the other hand, when compressed air is supplied into the piston housing 82, the advancing brake piston 83 comes into contact with the rotary holder 64, so that frictional resistance against rotation of the rotary holder 64 is generated (see FIG. 2). Thereby, the rotation of the winding bobbin 22 (package 30) can be braked by friction. Further, the advancement of the brake piston 83 strongly pushes the rotary holder 64 into the axial end of the take-up bobbin 22, so that the frictional coupling between the rotary holder 64 and the take-up bobbin 22 is strengthened, and the take-up bobbin 22 rotates. It becomes difficult to idle around the holder 64. Thus, the brake piston 83 is configured to simultaneously perform the rotation braking of the rotation holder 64 and the pressing of the rotation holder 64 to the winding bobbin 22 side.

  Next, a detailed configuration of the unit controller 50 will be described. The unit control unit 50 includes a lift-up control unit (separation control unit) 51, a brake control unit 52, and a winding control unit 55. Various control programs are stored in the ROM of the unit control unit 50. By executing the programs, hardware such as a CPU included in the unit control unit 50 is transferred to the lift-up control unit 51, the brake control, and the like. The unit 52, the winding control unit 55, and the like can be operated.

  The lift-up control unit 51 immediately drives the lift-up cylinder 72 via the solenoid valve 73 to lift the package 30 when the yarn break is detected or when the clearer 15 detects a yarn defect and cuts the yarn. Control is performed so as to be separated from the traverse drum 24.

  The brake controller 52 drives the brake piston 83 via the electromagnetic valve 84 to brake the rotation of the package 30 when the yarn break is detected or when the clearer 15 detects the yarn defect and cuts the yarn. To control.

  The winding control unit 55 controls the rotation of the traverse drum 24 that drives the package 30. An output shaft of a drum drive motor 53 is connected to the traverse drum 24, and the drum drive motor 53 is controlled by a motor control unit 54. The motor control unit 54 controls rotation / stop of the drum drive motor 53 based on a signal from the unit control unit 50. A rotation sensor 42 is attached to the traverse drum 24, and the rotation sensor 42 is electrically connected to the unit controller 50. The rotation sensor 42 is configured as a rotary encoder, for example, and is configured to transmit a rotation pulse signal to the unit controller 50 every time the traverse drum 24 rotates by a predetermined angle. The unit controller 50 can obtain the rotational speed of the traverse drum 24 (drum drive motor 53) by measuring the number of pulses per time.

  Next, the operation at the time of yarn joining of the winder unit 10 will be described with reference to FIG. FIG. 3 is a flowchart of lift-up and brake control of the package 30.

  In the control flow of FIG. 3, the unit control unit 50 stands by until a situation where a yarn splicing operation is necessary (S101). For example, when the yarn breakage occurs during the unwinding of the yarn 20 from the yarn feeding bobbin 21, the clearer 15 detects a defect of the running yarn 20 and the cutter 39 performs the yarn joining operation. The case where 20 is cut | disconnected is considered.

  When the situation where the yarn joining operation is necessary is detected by a signal from the clearer 15 or the like, the unit controller 50 acquires the winding diameter and winding speed of the package 30 (S102). Here, the winding diameter and winding speed of the package 30 can be obtained based on a signal from the rotation sensor 42. That is, the cumulative value of the number of rotations of the traverse drum 24 is obtained by counting the pulse signals input from the rotation sensor 42 from the time when the yarn is wound around the empty winding bobbin 22 to the present, and this cumulative value is obtained. The winding diameter of the package 30 can be obtained by calculation based on the value. Further, the winding speed can be easily obtained by counting the pulse signals per unit time.

  Next, the unit control unit 50 (brake control unit 52) sets an ON / OFF repetition pattern of the electromagnetic valve 84 of the package brake mechanism 81 based on the winding diameter and winding speed of the package 30 obtained in the process of S102. Determine (S103). In the process of S106 described later, the electromagnetic valve of the package brake mechanism 81 is controlled to open / close according to the repetition pattern determined in S103. As a specific example of the pattern, a pattern that is turned on for 0.1 seconds, turned off for 0.2 seconds, turned on for 0.1 seconds, turned off for 0.2 seconds, and so on can be considered.

  The ON / OFF repeating pattern is determined so that the proportion of the ON time becomes longer as the winding diameter of the package 30 is larger and the winding speed is larger. Accordingly, the stronger the inertia of the package 30 is, the stronger the braking force is applied.

  Subsequently, the unit controller 50 (lift-up controller 51) opens the electromagnetic valve 73 of the lift-up mechanism 71 and supplies compressed air to the lift-up cylinder 72 (S104). As a result, the lift-up cylinder 72 lifts the cradle 23, so that the package 30 is separated from the traverse drum 24.

  Next, the unit controller 50 operates a brake mechanism (not shown) of the traverse drum 24 to brake the inertial rotation of the traverse drum 24 (S105). Next, after starting this braking, the unit controller 50 (brake controller 52) repeatedly opens and closes the electromagnetic valve 84 of the package brake mechanism 81 in accordance with the ON / OFF repeat pattern determined in the process of S103. Control is performed (S106).

  When the electromagnetic valve 84 is opened, compressed air is supplied to the piston housing 82, and the brake piston 83 to be pressed comes into contact with the rotation holder 64, so that a braking force for braking the rotation of the rotation holder 64 is generated. Further, since the brake piston 83 generates a pressing force that presses the rotary holder 64 in a direction approaching the rotary holder 63 on the other side, the take-up bobbin 22 is strongly sandwiched between the rotary holders 63 and 64, and the take-up bobbin 22 And the rotation holders 63, 64 are strengthened (friction coupling). When the electromagnetic valve 84 is closed, the supply of compressed air to the piston housing 82 is stopped, so that the braking force against the rotation of the rotary holder 64 is weakened and the pressing force pressing the rotary holder 64 against the take-up bobbin 22 is also reduced. Weakened.

  The unit controller 50 repeats the process of S106 until the rotation of the package 30 is completely stopped (loop of S106 to S107). Therefore, since the electromagnetic valve 84 repeats ON / OFF at a predetermined timing, a zigzag pressure change as shown in FIG. 4 is obtained inside the piston housing 82. The graph of FIG. 4 shows a case where the electromagnetic valve 84 is controlled to be ON for 0.1 seconds, OFF for 0.2 seconds, ON for 0.1 seconds, OFF for 0.2 seconds, and so on. It shows the voltage output from the pressure gauge. In this control, the pressure repeatedly increases and decreases, but the peak of the measured value corresponds to approximately 0.3 MPa. As described above, the rotation of the package 30 is braked with a braking force with a change in strength, so that an effect such as a so-called pumping brake is produced, and even when the large-diameter package 30 is rotating at high speed, the package 30 can be stopped quickly. it can.

  In the ON / OFF repeating pattern, if the ON time is lengthened and the OFF time is shortened, the pressure in the piston housing 82 can be increased, and the rotation of the package 30 can be stopped in a short time. However, if the ON time is too long, the rotary holder 64 is pressed against the take-up bobbin 22 with a strong force, so that the take-up bobbin 22 is more likely to be damaged or deformed. In this respect, in this embodiment, the ON / OFF repeated pattern is determined in consideration of the winding diameter and winding speed of the package 30 before braking, so that the braking time of the package 30 is shortened and the winding bobbin 22 is prevented from being damaged. Both can be achieved.

  Further, in determining the pattern, it is considered that the rotation of the package 30 can be stopped almost simultaneously with or before the timing at which the traversing drum 24 being braked stops rotating. Thereby, since it can transfer to the following operation | movement (S110-) substantially simultaneously with the rotation stop of the traverse drum 24, the production efficiency of the package 30 can be improved.

  If it is determined in S107 that the rotation of the package 30 has been stopped, the electromagnetic valve 84 of the package brake mechanism 81 is turned off, and braking by the package brake mechanism 81 is released (S108). Next, the unit controller 50 waits until the traverse drum 24 stops rotating (S109). Thereafter, the electromagnetic valve 73 of the lift-up mechanism 71 is turned off, and the lift-up of the package 30 is released (S110).

  Next, the unit controller 50 reversely rotates the traverse drum 24 to reversely rotate the package 30, unwinds the yarn, and delivers it (S111). Thereafter, the threaded yarn end is captured by the suction mouth 34 of the upper yarn guide pipe 26 and guided to the splicer device 14, and is spliced to the yarn end guided by the lower yarn guide pipe 25 from the yarn feeding bobbin 21 side ( S112). Thereafter, the process returns to S101 and normal winding is resumed, and the unit control unit 50 waits again until the yarn joining operation is necessary while performing the winding control of the yarn by the winding control unit 55.

  As described above, the automatic winder of the present embodiment includes the cradle 23, the package brake mechanism 81, and the brake control unit 52. The cradle 23 supports a package 30 that winds the supplied yarn 20. The package brake mechanism 81 is provided in the cradle 23 and can brake the rotation of the package 30. The brake control unit 52 stops the rotation of the package 30 by alternately repeating the control to increase and weaken the braking of the package 30 by the package brake mechanism 81.

  Thereby, since strong braking is intermittently applied to the package 30, an effect like a so-called pumping brake is generated, and the rotation of the package 30 is effectively decelerated and stopped quickly in a short time. Can do. Thereby, productivity of the package 30 in an automatic winder can be improved.

  The automatic winder according to the present embodiment includes the traverse drum 24, a lift-up mechanism 71, and a lift-up control unit 51. The traverse drum 24 can rotate in contact with the peripheral surface of the package 30. The lift-up mechanism 71 can move the cradle 23 in a direction in which the package 30 moves away from the traverse drum 24. The lift-up control unit 51 can perform movement control of the cradle 23 by the lift-up mechanism 71 independently of the braking control of the package 30 by the brake control unit 52.

  Thereby, the braking with respect to the rotation of the package 30 and the separation of the package 30 from the traverse drum can be controlled separately. Accordingly, it is possible to easily perform control for increasing or decreasing braking against rotation of the package 30 (control for repeatedly turning on / off the electromagnetic valve 84) while maintaining the state where the package 30 is separated from the traverse drum 24 stably. It can be carried out.

  Further, in the automatic winder of the present embodiment, the traverse drum 24 is configured to rotate the package 30 by rotating in contact with the peripheral surface of the package 30. The brake control unit 52 controls the package brake mechanism 81 so that the rotational speed of the package 30 becomes zero almost simultaneously with or before the rotational speed of the traverse drum 24 becomes zero.

  Thereby, since the rotation of the package 30 can be stopped in time for stopping the rotation of the traverse drum 24, the operation can be quickly shifted to the next operation, and the productivity of the package 30 can be increased.

  Further, in the automatic winder of this embodiment, the cradle 23 includes a pair of rotating holders 63 and 64 to which the axial end of the winding bobbin 22 for winding the yarn can be attached. The package brake mechanism 81 applies a braking force to the rotation of the rotation holder 64 on one side, and applies a pressing force that presses the rotation holder 64 in a direction in which frictional coupling with the winding bobbin 22 is strengthened. It is configured. The brake control unit 52 changes the braking force and the pressing force according to the winding diameter and winding speed of the package 30.

  As a result, the braking force and the pressing force are changed according to the magnitude of the rotational inertia of the package 30, so that the winding bobbin 22 can be prevented from idling and the rotation of the package 30 can be effectively stopped in a short time. The bobbin 22 can be prevented from being damaged. In addition, since the control for increasing the braking against the rotation of the package 30 and the control for decreasing it are alternately repeated, it is possible to prevent a strong pressing force from being constantly applied to the winding bobbin 22 and to suppress damage to the winding bobbin 22. Furthermore, the effective magnitudes of the braking force and the pressing force can be easily changed by the control variation (variation of the ON / OFF pattern of the electromagnetic valve 84).

  Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

  The repetition interval of the above-mentioned ON / OFF repetition pattern can be arbitrarily changed. However, if the time interval from ON to the next ON is too long, vibration or the like is caused. Therefore, it is preferable to set a reasonably short time interval.

  Instead of the electromagnetic valve 84 of the type that switches ON / OFF, for example, an electropneumatic regulator can be adopted, and the control for increasing the pressure and the control for decreasing the pressure can be changed alternately.

  The cradle 23 can be changed to a type in which a so-called cheese type bobbin is mounted instead of a type in which the cone type winding bobbin 22 is mounted.

  In the winder unit 10 of the above-described embodiment, the traverse drum 24 is driven by the drum drive motor 53 while being in contact with the outer peripheral surface of the package 30 to rotate the package 30 in a driven manner. However, it is not limited to this structure, For example, it can change into the structure which connects the said rotation holder 64 to the output shaft of a motor. In this case, instead of the traverse drum 24, a contact roller that rotates following the outer peripheral surface of the package 30 can be provided. The traverse of the yarn can be performed by a reciprocating revolving arm type traverse device or a belt reciprocating drive type traverse device.

  In the above embodiment, the lift-up control unit 51 and the brake control unit 52 are provided in the unit control unit 50. However, instead of this configuration, the lift-up control unit 51, the brake control unit 52, and the like may be configured by hardware (for example, a dedicated processor) different from the unit control unit 50.

  The means for braking the rotating holder 64 and pressing it against the take-up bobbin 22 can be changed to an appropriate actuator such as a hydraulic cylinder or a servo motor instead of using a pneumatic piston as in the above embodiment. it can.

  The driving means of the cradle 23 can be changed to an appropriate actuator such as a hydraulic cylinder or a servo motor instead of a pneumatic cylinder such as the lift-up cylinder 72.

  As a method for detecting the winding diameter of the package 30, various methods other than the method using the pulse of the rotation sensor 42 can be adopted. For example, the rotation angle of the cradle 23 can be detected by an appropriate angle sensor, and the winding diameter of the package can be obtained by calculation from the detection value of the angle sensor.

  The present invention is not limited to an automatic winder, and can be applied to other yarn winding machines such as a spinning machine as long as the yarn winding machine is configured to brake the rotation of a package supported by a cradle.

Schematic of the winder unit with which the automatic winder as a yarn winding machine concerning one embodiment of the present invention is provided. Schematic which shows a mode that the lift-up of a package and brake control are performed. The flowchart which shows the lift up and brake control of a package. The graph which shows the pressure change in the piston housing of a package brake mechanism at the time of braking of a package.

Explanation of symbols

10 Winder unit 22 Winding bobbin 23 Cradle 24 Traverse drum (winding drum, contact rotating body)
30 Package 51 Lift-up control unit (separation control unit)
52 Brake control part 63, 64 Rotating holder 71 Lift-up mechanism (separation part)
81 Package brake mechanism (brake part)

Claims (5)

A cradle that supports a package for winding the supplied yarn;
A brake part provided in the cradle and capable of braking rotation of the package;
A brake control unit for stopping rotation of the package by alternately repeating control to increase and decrease braking of the package by the brake unit;
A yarn winding machine comprising: The yarn winding machine according to claim 1,
A contact rotating body capable of rotating in contact with the peripheral surface of the package;
A separation unit capable of moving the cradle in a direction in which the package is separated from the contact rotating body;
A separation control unit capable of performing movement control of the cradle by the separation unit independently of braking control of the package by the brake control unit;
A yarn winding machine comprising: A yarn winding machine according to claim 2,
The contact rotating body is a winding drum that rotates the package by rotating in contact with the peripheral surface of the package,
The brake control unit controls the brake unit so that the rotational speed of the package becomes zero substantially simultaneously with or before the rotational speed of the winding drum becomes zero. Take machine. A yarn winding machine according to any one of claims 1 to 3,
The cradle includes a pair of rotating holders on which an axial end of a winding bobbin for winding a yarn can be mounted,
The brake portion applies a braking force to rotation of at least one of the pair of rotating holders and pushes the rotating holder in a direction that strengthens frictional coupling between the rotating holder and the winding bobbin. Configured to exert pressure,
The yarn winding machine, wherein the brake control unit changes the braking force and the pressing force according to at least one of a winding diameter and a winding speed of the package.   An automatic winder as a yarn winding machine according to any one of claims 1 to 4.

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