JP2019157314A - False twisting machine - Google Patents

Abstract

To provide a false twisting machine including a pin-type twisting device, which stops rotation of a pin promptly when a thread breakage happens.SOLUTION: A false twisting machine comprises a thread breakage sensor 26 detecting a thread breakage and a control unit 30 for controlling operation of a motor 54 of a pin-type twisting device 15. When a thread breakage is detected by the thread breakage sensor 26, the control unit 30 stops the motor 54.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a false twisting machine equipped with a pin-type twisting device.

  For example, Patent Document 1 discloses a pin-type twisting device (pin twister-type false twisting device in Patent Document 1) that imparts a twist to a thread that runs inside a rotating pin (in Patent Document 1, a spinner). . In this pin-type twisting device, rollers are attached to two rotating shafts, respectively, and the cylindrical pins are held by magnets in contact with the peripheral surfaces of the respective rollers. When at least one of the rotating shafts is rotationally driven by the motor, the pin that is in contact with the roller rotates around the shaft, and a twist is imparted to the yarn traveling inside the pin.

JP 2002-67963 A

  In such a pin-type twisting device, even if yarn breakage occurs and the package cannot be produced, the pin continues to rotate until the operator stops the rotation of the pin. For this reason, there existed a problem that power wasted wasted or each member which comprises a pin type twisting apparatus was worn out, and lifetime was shortened. Moreover, since the pin is only held by the magnet, if the pin continues to rotate with the thread broken, the pin may come off at some beat and fall. When the pin falls, there is a problem that other devices are damaged or the pin is lost.

  In view of the above problems, an object of the present invention is to quickly stop the rotation of a pin when a yarn breakage occurs in a false twisting machine including a pin-type twisting device.

  The present invention has a cylindrical pin that is held in contact with the peripheral surface of a roller attached to each of the two rotating shafts, and at least one of the two rotating shafts is driven by a motor. A false twisting machine comprising a pin-type twisting device that rotates and drives the pin to twist the yarn traveling inside the pin, and detects yarn breakage. And a controller for controlling the operation of the motor. When the yarn breakage sensor is detected by the yarn breakage sensor, the control unit stops the motor.

  In the present invention, when the yarn breakage is detected by the yarn breakage sensor, the control unit automatically stops the motor of the pin-type twisting device. Therefore, the rotation of the pin can be quickly stopped when the yarn breakage occurs without waiting for the operator to stop the motor.

  In the present invention, a tension sensor for detecting the tension of the yarn and a cutter for cutting the yarn are further provided, and when the tension of the yarn detected by the tension sensor exceeds a predetermined upper limit value, or a predetermined lower limit value When it becomes less than the above, the control unit may cause the cutter to cut the yarn and stop the motor.

  When the tension of the yarn is excessive or excessive, there is a high possibility that the yarn breakage occurs or the quality of the package is deteriorated. Therefore, when the yarn tension exceeds a predetermined upper limit value or less than the lower limit value, cutting the yarn with a cutter may cause unexpected yarn breakage or producing a low-quality package. Can be suppressed. Furthermore, at that time, by stopping the motor of the pin-type twisting device, it is possible to avoid the pins from continuing to rotate unnecessarily while the yarn is cut.

  In the present invention, when the yarn tension detected by the tension sensor exceeds the upper limit value or less than the lower limit value, the control unit causes the cutter to stop the yarn and then stops the motor. Send commands.

  From the viewpoint of avoiding that the pin continues to rotate unnecessarily, it is preferable to stop the motor as soon as possible. However, if the motor begins to decelerate before the yarn is cut by the cutter, the balance between the yarn traveling speed and the rotational speed of the pin is lost, and the pin may come off due to the unstable behavior of the yarn. Therefore, as described above, by sending a stop command to the motor after cutting the yarn with the cutter, the motor does not start to decelerate before the yarn is cut, and the pin can be prevented from coming off. .

  In the present invention, the absolute value of the deceleration of the pin when stopping the pin is preferably larger than the absolute value of the acceleration of the pin when accelerating the pin.

  Thus, by relatively increasing the deceleration of the pin, the rotation of the pin can be quickly stopped, and the time during which the pin continues to rotate unnecessarily in a thread breakage state can be shortened.

  In this invention, it is good to further provide the alerting | reporting part which can be switched to the alerting | reporting state which alert | reports predetermined information to an operator, and when the said control part stops the said motor, it is good to switch the said alerting | reporting part to the said alerting | reporting state.

  In this way, the operator can easily recognize that the yarn breakage has occurred and that the yarn has been cut, and can quickly start work for resuming winding of the yarn.

  In the present invention, a plurality of processing units in which a yarn path is formed so as to pass through the pin twisting device and the yarn breakage sensor are arranged side by side, and the controller is configured to cut the yarn breakage by the yarn breakage sensor. The motor of the pin-type twisting device of the processing unit in which is detected may be stopped.

  In a false twisting machine in which a plurality of processing units (called weights) are arranged side by side, a common tangential belt is conventionally hung on the drive shaft of the pin-type twisting device of each processing unit. The type twisting device was configured to be driven all at once. For this reason, even if a thread breakage occurs in a certain processing unit, the tangential belt cannot be stopped, and the operator rushes to the processing unit and sets the drive shaft of the pin-type twisting device to the tangential belt. It was necessary to manually disconnect from the machine. In that respect, according to the present invention, when the yarn breakage occurs, the control unit automatically stops the motor of the pin-type twisting device of the processing unit, so that the burden on the operator can be reduced and the rotation of the pin Can be stopped reliably and quickly.

It is a mimetic diagram showing composition of a false twist processing machine concerning this embodiment. It is a block diagram which shows the electrical structure of a false twisting machine. It is a schematic diagram which shows the structure of a pin type twisting apparatus. It is the figure which looked at the pin type twisting apparatus from the IV direction of FIG. It is a flowchart which shows the motor control of the pin type twisting apparatus during package production.

  Embodiments of the present invention will be described below with reference to the drawings.

(Overall configuration of false twisting machine)
FIG. 1 is a schematic diagram illustrating a configuration of a false twisting machine 1 according to the present embodiment. As shown in FIG. 1, the false twisting machine 1 includes a yarn supplying unit 2 that supplies a plurality of yarns Y, and a processing unit 3 that performs false twisting on the plurality of yarns Y supplied from the yarn supplying unit 2. And a winding unit 4 that winds a plurality of yarns Y that have been false twisted by the processing unit 3 to form a plurality of packages P.

  The yarn supplying unit 2 includes a creel stand 10 that holds a plurality of yarn supplying packages Q, and supplies a plurality of yarns Y to the processing unit 3. The processing unit 3 includes, in order from the upstream side in the yarn traveling direction, a first feed roller 11, a twisting guide 12, a first heating device 13, a cooling device 14, a pin-type twisting device 15, a second feed roller 16, and an interlacing device. 17, the third feed roller 18, the second heating device 19, and the fourth feed roller 20 are arranged along the yarn path. The winding unit 4 forms a plurality of packages P by winding a plurality of yarns Y that have been false twisted by the processing unit 3 with a plurality of winding devices 21.

  The false twisting machine 1 has a main machine base 5 and a take-up base 6 that are arranged to face each other with a gap in the left-right direction in FIG. The main machine base 5 and the take-up base 6 are extended in the direction perpendicular to the paper surface of FIG. 1 (hereinafter referred to as the machine base longitudinal direction). The upper part of the main machine base 5 and the upper part of the winding base 6 are connected by a support frame 7. Each device constituting the processing unit 3 is mainly attached to the main machine base 5 and the support frame 7. A work space 8 is formed by the main machine base 5, the winding base 6 and the support frame 7. In other words, the main machine base 5, the winding base 6 and the support frame 7 are arranged so as to surround the work space 8, and the yarn Y is configured to travel mainly around the work space 8. The operator performs various operations such as threading in the work space 8.

  The false twisting machine 1 has a unit unit called a span including a set of a main machine base 5 and a winding base 6 that are arranged to face each other. In one span, a plurality of processing units (also referred to as weights) in which yarn paths are formed so as to pass through the respective devices constituting the processing unit 3 are arranged side by side in the machine table longitudinal direction. As a result, in one span, false twisting can be simultaneously performed on a plurality of yarns Y traveling in a state of being aligned in the machine table longitudinal direction. The false twisting machine 1 has the spans symmetrically arranged in the machine width direction around the main machine stand 5 (the main machine stand 5 is common to the left and right spans), and in the machine table longitudinal direction. It has a configuration in which a plurality of spans are arranged. In FIG. 1, illustration of the left span is omitted.

(process section)
The first feed roller 11 is a roller that feeds the yarn Y supplied from the yarn supplying unit 2 toward the first heating device 13. The first feed roller 11 is disposed on the upper part of the winding table 6. The first feed roller 11 has a drive roller and a driven roller, and the yarn Y travels when the drive roller is rotationally driven with the yarn Y sandwiched between the drive roller and the driven roller. Send downstream in the direction. In one span, each drive roller is connected to a common drive shaft. Each driven roller is switched between a state in which the driven roller is in contact with a corresponding driving roller (a state in which the yarn Y is fed across the yarn Y) and a state in which the driven roller is separated (a state in which the yarn can be hooked), for example, by a lever operation by an operator Can do. The second feed roller 16, the third feed roller 18, and the fourth feed roller 20 have the same configuration.

  The twisting guide 12 is for preventing the twist imparted to the yarn Y by the pin-type twisting device 15 from being propagated upstream of the twisting guide 12 in the yarn traveling direction. The twist guide 12 is disposed between the first feed roller 11 and the first heating device 13 in the yarn traveling direction. The twisting guide 12 extends along the guide rail 22 extending in the vertical direction, the thread hooking position at the lower end of the guide rail 22 (broken line in FIG. 1), and the operating position at the upper end of the guide rail 22 (solid line in FIG. 1). It is configured to be movable between. Specifically, the twist guide 12 is attached to a member called a shifter (not shown), and the twist guide 12 can be moved by moving the shifter along the guide rail 22 by a cylinder (not shown). It has become. For details, refer to, for example, Japanese Patent Application Laid-Open No. 2016-27218.

  The first heating device 13 is a device for heating the yarn Y that has been twisted by the pin-type twisting device 15. The first heating device 13 is attached to the upper end portion of the support frame 7.

  The cooling device 14 is a device for cooling the yarn Y heated by the first heating device 13. The cooling device 14 is disposed between the first heating device 13 and the pin-type twisting device 15 in the yarn traveling direction.

  The pin-type twisting device 15 is a device for imparting twist to the yarn Y. The pin-type twisting device 15 is disposed on the upper part of the main machine base 5. Details of the pin-type twisting device 15 will be described later.

  The second feed roller 16 is a roller that feeds the yarn Y, which has been twisted by the pin-type twisting device 15, toward the entanglement device 17. The second feed roller 16 is disposed below the pin-type twisting device 15 in the main machine base 5. The yarn Y conveyance speed by the second feed roller 16 is faster than the yarn Y conveyance speed by the first feed roller 11. For this reason, the yarn Y is stretched between the first feed roller 11 and the second feed roller 16.

  The entanglement device 17 is a device that imparts entanglement by injecting air onto the yarn Y. The interlacing device 17 is disposed below the second feed roller 16 in the main machine base 5.

  The third feed roller 18 is a roller that feeds the yarn Y, which has been entangled by the entanglement device 17, toward the second heating device 19. The third feed roller 18 is disposed below the entanglement device 17 in the main machine base 5. The conveyance speed of the yarn Y by the third feed roller 18 is slower than the conveyance speed of the yarn Y by the second feed roller 16. For this reason, the yarn Y is relaxed between the second feed roller 16 and the third feed roller 18.

  The second heating device 19 is a device for heating the yarn Y sent from the third feed roller 18. The second heating device 19 is disposed below the third feed roller 18 in the main machine base 5.

  The fourth feed roller 20 is a roller that sends the yarn Y heat-treated by the second heating device 19 toward the winding device 21. The fourth feed roller 20 is disposed at the lower part of the winding table 6. The yarn Y conveying speed by the fourth feed roller 20 is slower than the yarn Y conveying speed by the third feed roller 18. For this reason, the yarn Y is relaxed between the third feed roller 18 and the fourth feed roller 20.

  In the processing unit 3 configured as described above, the pin Y twisting device 15 imparts twist to the yarn Y drawn between the first feed roller 11 and the second feed roller 16. The twist formed by the pin-type twisting device 15 is propagated up to the twisting guide 12 but does not propagate upstream of the twisting guide 12 in the yarn traveling direction. The yarn Y that has been stretched while being twisted in this way is heated by the first heating device 13, then cooled by the cooling device 14 and thermally fixed. The yarn Y that has passed through the pin-type twisting device 15 is untwisted before reaching the second feed roller 16. However, since the twist of the yarn Y is thermally fixed as described above, each filament maintains a wavy false twist state. Thereafter, the yarn Y, which is entangled by the entanglement device 17 and heat-fixed by the second heating device 19, is wound by the winding device 21.

  The false twisting machine 1 of the present embodiment is further provided with a cutter 23, a tension sensor 24, a suction 25, and a thread break sensor 26 on the yarn path. The cutter 23 is disposed upstream of the first feed roller 11 in the yarn traveling direction, and cuts the yarn Y. The tension sensor 24 is arranged on the downstream side of the pin type twisting device 15 in the yarn traveling direction, and measures the tension of the yarn Y to which the twist is applied. The suction 25 is disposed below the third feed roller 18 of the main machine base 5 and is used for temporarily sucking and holding the yarn Y during the yarn hooking operation. The yarn break sensor 26 is disposed downstream of the fourth feed roller 20 in the yarn traveling direction, and detects the yarn break by detecting the presence or absence of the yarn Y. Note that the arrangement of these devices is not limited to the positions described here.

  In addition, a notification unit 27 is provided in the upper part of the main machine base 5. The notification unit 27 of the present embodiment is configured by a lamp, and can be notified of predetermined information to the operator by switching to a state (notification state) in which the lamp is lit or blinked in a predetermined case. However, the specific configuration of the notification unit 27 is not limited to this. For example, predetermined information may be notified to the operator by voice information from a speaker, character information displayed on a screen, or the like.

(Electrical configuration)
FIG. 2 is a block diagram showing an electrical configuration of the false twisting machine 1. As shown in FIG. 2, the false twisting machine 1 includes a control unit 30 that controls the operation of each device of a plurality of processing units. In FIG. 2, each device is illustrated only for the processing unit A for the sake of space, and the detailed illustration is omitted for the processing unit B and subsequent units.

  Output signals from the tension sensor 24 and the thread break sensor 26 are transmitted to the control unit 30. The control unit 30 controls operations of the cutter 23, the notification unit 27, and the motor 54 of the pin twisting device 15, which will be described later, according to output signals from the tension sensor 24 and the yarn break sensor 26. Incidentally, not only the operation of the motor 54 is controlled by the control unit 30 but also the operation of the motor 54 can be switched by the operator operating the operation unit 32. The control unit 30 is connected to a setting unit 31 through which an operator inputs various setting values. Although the setting part 31 can be comprised with a touch panel, for example, you may employ | adopt other structures, such as a keyboard.

(Pin type twisting device)
FIG. 3 is a schematic view showing the configuration of the pin-type twisting device 15, and FIG. 4 is a view of the pin-type twisting device 15 as viewed from the IV direction of FIG. The pin-type twisting device 15 imparts twist to the yarn Y traveling inside the pin 41 when the cylindrical pin 41 rotates around its axis. In FIG. 3, it is assumed that the yarn Y travels from top to bottom. In FIG. 4, the guide member 52 is not shown.

  The pin-type twisting device 15 has two rotating shafts 43 and 44 that are rotatably supported by a support member 42 via a bearing (not shown). Two rollers 45 and 46 that are spaced apart in the axial direction are attached to the rotating shaft 43. Two rollers 47 and 48 that are spaced apart in the axial direction are attached to the rotating shaft 44. The roller 45 and the roller 47 are disposed at the same position in the axial direction, and are slightly separated so as not to contact each other as shown in FIG. The positional relationship between the rollers 46 and 48 is the same as the positional relationship between the rollers 45 and 47. The rotating shaft 43 is rotationally driven around the axis by the power transmitted from the motor 54.

  The pin 41 is a cylindrical member extending in the axial direction, and the yarn Y travels inside the pin 41. A magnetic part 41 a that opposes magnets 49 and 50, which will be described later, is formed at an intermediate part in the axial direction of the pin 41. Further, a winding portion 41b extending in the diametrical direction is fixed to one end portion in the axial direction of the pin 41 (downstream end portion in the yarn traveling direction). The yarn Y is wound around the winding portion 41b by one turn, and the yarn Y is twisted when the pin 41 rotates around the axis.

  A magnet 49 is disposed between the roller 45 and the roller 46 in the axial direction. Similarly, a magnet 50 is disposed between the roller 47 and the roller 48 in the axial direction. The magnets 49 and 50 are fixed to the support member 42 via a bracket 51 (see FIG. 4). When the pin 41 is inserted between the roller 45 (46) and the roller 47 (48) so that the magnetic part 41a of the pin 41 faces the magnets 49 and 50, as shown in FIG. , 50. Specifically, the magnet is sandwiched between the roller 45 (46) and the roller 47 (48) and is in contact with the peripheral surface of the roller 45 (46) and the peripheral surface of the roller 47 (48). 49, 50. The pin 41 is not mechanically fixed to other members, and is only held by the magnetic force of the magnets 49 and 50 and the frictional force with the peripheral surfaces of the rollers 45 to 48.

  A ring-shaped guide member 52 is disposed on the upstream side of the pin 41 in the yarn traveling direction. The guide member 52 is fixed to the support member 42 via a bracket (not shown). Further, a pipe-shaped guide member 53 is disposed on the downstream side of the pin 41 in the yarn traveling direction. The guide member 53 is directly fixed to the support member 42. However, the shape and fixing method of the guide members 52 and 53 are not limited to the form described here, and can be changed as appropriate.

  As shown in FIG. 4, when the roller 45 is rotated by rotationally driving the rotating shaft 43, the pin 41 that is in contact with the peripheral surface of the roller 45 is driven to rotate in the direction opposite to the roller 45. Further, the roller 47 in contact with the peripheral surface of the pin 41 is driven to rotate in the same direction as the roller 45. When the pin 41 is rotationally driven around the axis, the yarn Y is twisted. At this time, as indicated by arrows in FIG. 4, the rotation direction of the rotary shaft 43 that is rotationally driven by the power transmitted from the motor 54 is such that the pin 45 is attached to the two rotary shafts 43 and 44. (46) and the roller 47 (48) are preferably pushed in the direction. By doing so, the pin 41 can be prevented from being separated from the roller 45 (46), and the power of the motor 54 can be reliably transmitted to the pin 41 via the roller 45 (46).

  By the way, the twist imparted to the yarn Y includes an S twist and a Z twist whose twist directions are opposite to each other. When the twist direction is switched, the power transmission destination of the motor 54 may be switched from the rotating shaft 43 to the rotating shaft 44. For example, when the power from the motor 54 is transmitted by the belt, the belt hung on the rotating shaft 43 may be replaced with the rotating shaft 44. Although the pin 41 may be easily separated from the roller 45 (46), the rotation direction of the pin 41 is changed by changing the rotation direction of the rotation shafts 43 and 44 by using the motor 54 as a motor that can rotate forward and reverse. The twist direction of the yarn Y may be switched.

(Motor stop control)
In the false twisting machine 1 configured as described above, yarn breakage may occur in any of the processing units during the production of the package P (winding the yarn Y). Even if the yarn breakage occurs, if the motor 54 (pin 41) of the pin type twisting device 15 of the processing unit continues to rotate, each member constituting the pin type twisting device 15 consumes power wastefully. May wear out and shorten its life. Moreover, since the pin 41 is only held by the magnets 49 and 50, if the pin 41 continues to rotate with the thread Y cut, the pin 41 may come off at some point and fall. When the pin 41 falls, other devices may be damaged or the pin 41 may be lost.

  Therefore, in the present embodiment, the pin type twisting device 15 of each processing unit is configured to be individually driven by the motor 54, and the motor 54 of each pin type twisting device 15 is automatically stopped by the control unit 30. Control is performed. FIG. 5 is a flowchart showing motor control of the pin-type twisting device 15 during package production. Control part 30 performs control shown in Drawing 5 to pin type twisting device 15 of each processing unit.

  If a yarn break occurs in a certain processing unit during the production of the package P (YES in step S1), this is detected by the yarn break sensor 26, and a yarn break signal is output from the yarn break sensor 26 to the control unit 30. . When receiving the yarn break signal, the control unit 30 transmits a stop command to the motor 54 of the pin-type twisting device 15 of the processing unit to stop the rotation of the motor 54 (pin 41) (step S2). Further, the control unit 30 switches the notification unit 27 to the notification state when stopping the motor 54. Thereby, the operator can recognize that the yarn breakage has occurred and the rotation of the pin 41 is stopped.

  The acceleration and deceleration of the pin 41 can be freely set by the operator via the setting unit 31. In this embodiment, the deceleration of the pin 41 when stopping the pin 41 is set to −80,000 rpm / s, and the acceleration of the pin 41 when accelerating the pin 41 is set to 14,000 rpm / s. However, the deceleration and acceleration of the pin 41 can be changed as appropriate.

  By the way, if the tension of the yarn Y is excessively high or low, there is a high possibility that the yarn breakage occurs or the quality of the package P deteriorates. Therefore, even when the yarn breakage does not occur in a certain processing unit (NO in step S1), when the tension detected by the tension sensor 24 exceeds the predetermined upper limit value or less than the lower limit value (YES in step S3). The control unit 30 operates the cutter 23 of the processing unit to cut the yarn Y (step S4). As a result, it is possible to prevent unexpected thread breakage and production of a low-quality package P. The upper limit value and the lower limit value can be freely set by the operator via the setting unit 31.

  If the pin 41 of the pin-type twisting device 15 continues to rotate after the yarn Y is cut, various problems may occur as described above, as in the case where the yarn breakage occurs. Thus, immediately after the cutter 23 cuts the yarn Y, the control unit 30 transmits a stop command to the motor 54 to stop the rotation of the motor 54 (pin 41) (step S5). Further, the control unit 30 switches the notification unit 27 to the notification state when stopping the motor 54. Accordingly, the operator can recognize that the yarn Y has been cut and the rotation of the pin 41 has been stopped.

  In a certain processing unit, yarn breakage does not occur, and while the tension of the yarn Y is within the allowable range between the lower limit value and the upper limit value, the yarn Y that has been false twisted by the processing unit 3 is wound. It is wound up by the take-up unit 4 to form a high-quality package P.

(effect)
In this embodiment, when the yarn breakage is detected by the yarn breakage sensor 26, the control unit 30 automatically stops the motor 54 of the pin-type twisting device 15. Therefore, the rotation of the pin 41 can be quickly stopped when the yarn breakage occurs without waiting for the operator to stop the motor 54.

  In the present embodiment, when the tension of the yarn Y detected by the tension sensor 24 exceeds a predetermined upper limit value or less than a predetermined lower limit value, the control unit 30 causes the cutter 23 to cut the yarn Y, The motor 54 of the pin type twisting device 15 is stopped. When the tension of the yarn Y is excessive or excessive, there is a high possibility that the yarn breakage occurs or the quality of the package P deteriorates. Therefore, when the tension of the yarn Y exceeds the predetermined upper limit value or less than the lower limit value, the yarn Y is cut by the cutter 23, thereby causing unexpected yarn breakage or producing a low-quality package P. Can be suppressed. Furthermore, by stopping the motor 54 of the pin type twisting device 15 at that time, it is possible to avoid the pin 41 from continuing to rotate unnecessarily in a state where the yarn Y is cut.

  In the present embodiment, when the tension of the yarn Y detected by the tension sensor 24 exceeds the upper limit value or less than the lower limit value, the control unit 30 causes the cutter 23 to cut the yarn Y, A stop command is transmitted to the motor 54 of the pin-type twisting device 15. From the viewpoint of avoiding that the pin 41 continues to rotate unnecessarily, it is preferable to stop the motor 54 as soon as possible. However, if the motor 54 begins to decelerate before cutting the yarn Y by the cutter 23, the balance between the traveling speed of the yarn Y and the rotational speed of the pin 41 is lost, and the pin 41 is released due to the unstable behavior of the yarn Y. There is a risk that. Therefore, as described above, by sending a stop command to the motor 54 after cutting the yarn Y with the cutter 23, the motor 54 does not start to decelerate before the yarn Y is cut, and the pin 41 is released. That can be suppressed.

  In the present embodiment, the absolute value of the deceleration of the pin 41 when stopping the pin 41 of the pin type twisting device 15 is larger than the absolute value of the acceleration of the pin 41 when accelerating the pin 41. Thus, by relatively increasing the deceleration of the pin 41, the rotation of the pin 41 can be quickly stopped, and the time during which the pin 41 continues to rotate unnecessarily in a thread breakage state can be shortened.

  In this embodiment, it further includes a notification unit 27 that can be switched to a notification state for notifying the operator of predetermined information, and the control unit 30 sets the notification unit 27 when the motor 54 of the pin-type twisting device 15 is stopped. Switch to the notification state (lamp lighting or blinking). In this way, the operator can easily recognize that the yarn break has occurred and that the yarn Y has been cut, and can quickly start work for resuming winding of the yarn Y.

  In this embodiment, a plurality of processing units each having a yarn path formed so as to pass through the pin-type twisting device 15 and the yarn break sensor 26 are arranged side by side. The motor 54 of the pin-type twisting device 15 of the processing unit in which the cut is detected is stopped. In the false twisting machine 1 in which a plurality of processing units are arranged side by side, a common tangential belt is conventionally hung on the drive shaft of the pin-type twisting device 15 of each processing unit. The apparatus 15 is configured to be driven all at once. For this reason, even if a thread breakage occurs in a certain processing unit, the tangential belt cannot be stopped, and the operator rushes to the processing unit and turns the drive shaft of the pin-type twisting device 15 into the tangential It was necessary to manually disconnect from the belt. In this regard, according to the present embodiment, when the yarn breakage occurs, the control unit 30 automatically stops the motor 54 of the pin-type twisting device 15 of the processing unit, so that the burden on the operator can be reduced. The rotation of the pin 41 can be stopped reliably and quickly.

(Other embodiments)
Modifications in which various modifications are made to the above embodiment will be described.

  (1) In the above embodiment, the yarn break sensor 26 is provided separately from the tension sensor 24, and the yarn break sensor 26 detects the yarn break. However, since the tension sensor 24 can detect the thread break, the thread break sensor 26 may be omitted and the tension sensor 24 may detect the thread break. In this case, the tension sensor 24 also functions as the yarn break sensor of the present invention.

  (2) In the above embodiment, when the tension detected by the tension sensor 24 exceeds a predetermined upper limit value or less than the lower limit value, the cutter Y cuts the yarn Y and then the motor 54 of the pin-type twisting device 15. It is assumed that a stop command is sent to. However, a stop command may be transmitted to the motor 54 at the same time as or immediately before the cutter 23 cuts the yarn Y.

  (3) In the above embodiment, the notification unit 27 is switched to the notification state at the time of yarn breakage or yarn cut. However, it is not essential to switch the notification unit 27 to the notification state at the time of yarn breakage or yarn cutting, and the notification unit 27 may be omitted.

  (4) In the above embodiment, the notification unit 27 is provided separately from the operation unit 32. However, the operation unit 32 may be configured to have the function of the notification unit 27. For example, when the operation unit 32 is configured with a button as in the above-described embodiment, the button may be configured to be lit or blinking so as to function as a notification unit.

  (4) In the pin-type twisting device 15 of the above-described embodiment, only one rotating shaft 43 of the two rotating shafts 43 and 44 is rotationally driven by the motor 54. However, you may comprise so that both the two rotating shafts 43 and 44 may be rotationally driven. In this case, it is possible to easily switch between the S twist and the Z twist without changing the belt.

  (5) Various changes may be made to each device constituting the false twisting machine 1 of the above embodiment. For example, in the above embodiment, the twisting guide 12 is movable by a shifter, but the twisting guide 12 can be fixed (see JP 2011-47074 A), or the shifter can be manually operated. It is good also as a structure to move. Further, the cooling device 14 and the second heating device 19 can be omitted.

1: False twisting machine 15: Pin type twisting device 23: Cutter 24: Tension sensor 26: Yarn break sensor 27: Notification unit 30: Control unit 41: Pin 43, 44: Rotating shaft 45-48: Roller 54: Motor Y: Yarn

Claims (6)

A cylindrical pin that is held in contact with a peripheral surface of a roller attached to each of the two rotating shafts, and at least one of the two rotating shafts is rotationally driven by a motor; And, a false twisting machine comprising a pin-type twisting device that rotates the pin and applies twist to the yarn traveling inside the pin,
A thread breakage sensor for detecting thread breakage;
A control unit for controlling the operation of the motor;
With
The false twisting machine, wherein when the yarn breakage is detected by the yarn breakage sensor, the control unit stops the motor. A tension sensor that detects the tension of the yarn;
A cutter for cutting the yarn,
Further comprising
When the tension of the yarn detected by the tension sensor exceeds a predetermined upper limit value or less than a predetermined lower limit value, the control unit causes the cutter to cut the yarn and stop the motor. The false twisting machine according to claim 1, wherein   When the yarn tension detected by the tension sensor exceeds the upper limit value or less than the lower limit value, the control unit causes the cutter to cut the yarn and then transmits a stop command to the motor. The false twisting machine according to claim 2.   The absolute value of the deceleration of the pin when stopping the pin is larger than the absolute value of the acceleration of the pin when accelerating the pin. The false twisting machine described. A notification unit capable of switching to a notification state for notifying the operator of predetermined information;
The false twisting machine according to any one of claims 1 to 4, wherein the control unit switches the notification unit to the notification state when the motor is stopped. A plurality of processing units in which a yarn path is formed so as to pass through the pin twisting device and the yarn break sensor are arranged side by side,
The said control part stops the said motor of the said pin type twisting apparatus of the said process unit by which the thread breakage was detected by the said thread breakage sensor, The any one of Claims 1-5 characterized by the above-mentioned. False twisting machine.

Images