False twist processing machine

Abstract

The invention relates to a false twist processing machine. In a false twisting machine provided with a needle-type twisting device, the rotation of a needle is quickly stopped when a yarn is broken. The device is provided with a broken yarn sensor (26) for detecting broken yarns and a control part (30) for controlling the action of a motor (54) of the needle type twisting device (15), and when the broken yarn sensor (26) detects the broken yarns, the control part (30) stops the motor (54).

Description

[0001] This application is a divisional application of application number 201910115987.4, filed on February 15, 2019, entitled "False Twist Processing Machine". Technical Field

[0002] This invention relates to a false twisting processing machine equipped with a needle-type twisting device. Background Technology

[0003] For example, Patent Document 1 discloses a needle-type twisting device (or needle-twisting machine-type false twisting device) for twisting threads traveling inside a rotating needle (or small rotor in Patent Document 1). In this needle-type twisting device, rollers are mounted on two rotating shafts, and a cylindrical needle is held by a magnet while in contact with the circumferential surface of each roller. Furthermore, when at least one of the rotating shafts is driven by a motor, the needle in contact with the roller rotates around the shaft, twisting the threads traveling inside the needle.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2002-69763 In such needle-type twisting devices, even when filament breakage prevents the production of packages, the needle continues to rotate until the operator stops its rotation. This results in unnecessary power consumption and reduced lifespan due to wear and tear on the components of the needle-type twisting device. Furthermore, since the needle is held solely by a magnet, it may detach and fall off for various reasons when rotating continuously with the filament broken. This falling needle can damage other components or result in needle loss. Summary of the Invention

[0005] In view of the above problems, the object of the present invention is to quickly stop the rotation of the needle in a false twisting machine equipped with a needle twisting device when a filament breakage occurs.

[0006] The present invention is a false twisting machine comprising a needle-type twisting device having a cylindrical needle held in contact with the circumferential surfaces of rollers respectively mounted on two rotating shafts. A motor drives at least one of the two rotating shafts to rotate, thereby rotating the needle and twisting the yarn traveling inside the needle. The false twisting machine is characterized by comprising: a yarn breakage sensor for detecting yarn breakage; and a control unit for controlling the operation of the motor. When a yarn breakage is detected by the yarn breakage sensor, the control unit stops the motor.

[0007] In this invention, when a broken wire is detected by the wire breakage sensor, the control unit automatically stops the motor of the needle twisting device. Therefore, the rotation of the needle can be quickly stopped when a broken wire occurs without waiting for the operator to stop the motor.

[0008] In this invention, it may also include: a tension sensor for detecting the tension of the thread; and a cutter for cutting the thread. When the tension of the thread detected by the tension sensor exceeds a predetermined upper limit or is less than a predetermined lower limit, the control unit causes the cutter to cut the thread and stops the motor.

[0009] When the tension of the yarn becomes too high or too low, the likelihood of yarn breakage or deterioration in package quality increases. Therefore, when the yarn tension exceeds the specified upper limit or falls below the lower limit, the yarn is cut by a cutter, thereby preventing accidental yarn breakage and the production of low-quality packages. Furthermore, at this time, by stopping the motor of the needle twisting device, the needless continuous rotation of the needle can be avoided while the yarn is cut.

[0010] In this invention, when the tension of the thread detected by the tension sensor exceeds the upper limit or is less than the lower limit, the control unit sends a stop command to the motor after the cutter cuts the thread.

[0011] From the perspective of avoiding the needle's unproductive continuous rotation, it is preferable to stop the motor as quickly as possible. However, if the motor begins to decelerate before the thread is cut by the cutter, the balance between the thread's travel speed and the needle's rotation speed is disrupted, potentially causing the needle to detach due to the unstable movement of the thread. Therefore, as described above, sending a stop command to the motor after the thread has been cut by the cutter prevents the motor from decelerating before the thread is cut, thus suppressing needle detachment.

[0012] In this invention, the absolute value of the deceleration of the needle when it stops is greater than the absolute value of the acceleration of the needle when it accelerates.

[0013] In this way, by making the deceleration of the needle relatively large, the rotation of the needle can be stopped quickly, which can shorten the time that the needle continues to rotate uselessly in the case of a broken wire.

[0014] In this invention, a notification unit may also be provided, which can be switched to a notification state that notifies the operator of specified information. When the control unit stops the motor, the notification unit switches the notification unit to the notification state.

[0015] In this way, operators can easily identify situations where filaments have broken or the thread has been cut, and can quickly begin work to restart the winding of the thread.

[0016] In this invention, multiple processing units may be arranged in a row, each processing unit forming a thread channel by means of the aforementioned needle twisting device and the aforementioned thread breakage sensor, and the aforementioned control unit stops the motor of the aforementioned needle twisting device of the aforementioned processing unit when the aforementioned thread breakage sensor detects a thread breakage.

[0017] In conventional false-twisting machines with multiple processing units (called spindles) arranged in a row, a common tangential drive belt is wound onto the drive shaft of the needle twisting device in each processing unit, and all needle twisting devices are driven together. Therefore, the tangential drive belt would not stop due to a broken yarn in a processing unit, requiring an operator to rush to that unit and manually detach the drive shaft of the needle twisting device from the tangential drive belt. Regarding this, according to the present invention, in the event of a broken yarn, the control unit automatically stops the motor of the needle twisting device in that processing unit, thus reducing the operator's workload and enabling a reliable and rapid stop of needle rotation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the configuration of the false twisting processing machine according to this embodiment.

[0019] Figure 2 This is a block diagram showing the electrical configuration of a false twisting machine.

[0020] Figure 3 This is a schematic diagram showing the structure of a needle-type twisting device.

[0021] Figure 4 From Figure 3 A diagram of the needle twisting device observed from direction IV.

[0022] Figure 5 This is a flowchart illustrating the motor control of the needle twisting device in roll production.

[0023] Explanation of symbols 1: False twisting processing machine; 15: Needle twisting device; 23: Cutter; 24: Tension sensor; 26: Broken wire sensor; 27: Notification unit; 30: Control unit; 41: Needle; 43, 44: Rotating shaft; 45~48: Roller; 54: Motor; Y: Thread. Detailed Implementation

[0024] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0025] (The overall structure of a false twisting processing machine) Figure 1 This is a schematic diagram showing the configuration of the false twisting processing machine 1 according to this embodiment. Figure 1As shown, the false twisting processing machine 1 is configured to include: a yarn feeding section 2 for supplying multiple yarns Y; a processing section 3 for performing false twisting processing on the multiple yarns Y supplied from the yarn feeding section 2; and a winding section 4 for winding the multiple yarns Y that have been false twisted by the processing section 3 to form multiple packages P.

[0026] The yarn feeding section 2 has a bobbin holder 10 that holds multiple yarn packages Q and supplies multiple yarns Y to the processing section 3. The processing section 3 is configured such that, starting from the upstream side of the yarn travel direction, a first feed roller 11, a twist guide 12, a first heating device 13, a cooling device 14, a needle twisting device 15, a second feed roller 16, a winding device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20 are arranged sequentially along the yarn channel. The winding section 4 uses multiple winding devices 21 to wind the multiple yarns Y that have undergone false twisting processing in the processing section 3 to form multiple packages P.

[0027] False twist processing machine 1 has the ability to... Figure 1 The main body 5 and the winding body 6 are arranged opposite each other at intervals in the left-right direction (hereinafter referred to as the width direction of the machine body). The main body 5 and the winding body 6 are in... Figure 1 The main body 5 extends in a direction perpendicular to the paper surface (hereinafter referred to as the length direction of the machine body). The upper part of the main body 5 and the upper part of the winding body 6 are connected by a support frame 7. The various devices constituting the processing unit 3 are mainly installed on the main body 5 and the support frame 7. The main body 5, the winding body 6, and the support frame 7 form a working space 8. In other words, the main body 5, the winding body 6, and the support frame 7 are configured to surround the working space 8, and the yarn Y mainly travels around the working space 8. The operator performs various operations such as yarn hanging in the working space 8.

[0028] The false-twisting machine 1 has a unit unit called a span, comprising a set of main bodies 5 arranged opposite each other and a winding body 6. Within a span, multiple processing units (also called spindles) are arranged along the length of the machine body, and each processing unit forms a wire channel via various devices constituting the processing section 3. Thus, within a span, multiple wires Y traveling in a state arranged along the length of the machine body can be false-twisted simultaneously. The false-twisting machine 1 is configured such that the spans are arranged symmetrically left and right along the width of the machine body with the main bodies 5 as the center (the main bodies 5 are common in the left and right spans), and multiple spans are arranged along the length of the machine body. Figure 1 In the diagram, the span on the left is omitted.

[0029] (Processing Department) The first feed roller 11 is a roller that conveys the yarn Y supplied from the yarn supply section 2 toward the first heating device 13. The first feed roller 11 is disposed on the upper part of the winding body 6. The first feed roller 11 has a drive roller and a driven roller. When the yarn Y is clamped between the drive roller and the driven roller, the drive roller is rotated to convey the yarn Y downstream in the yarn travel direction. In one span, each drive roller is connected to a common drive shaft. Each driven roller can be switched between a state of contact with the corresponding drive roller (the state of clamping and conveying the yarn Y) and a state of separation from the corresponding drive roller (the state of being able to hold yarn) by, for example, a lever operation performed by an operator. The second feed roller 16, the third feed roller 18, and the fourth feed roller 20 also have the same configuration.

[0030] The anti-twist guide 12 is used to prevent the twist imparted to the yarn Y by the needle twisting device 15 from propagating upstream of the anti-twist guide 12 in the yarn travel direction. The anti-twist guide 12 is disposed between the first feed roller 11 and the first heating device 13 in the yarn travel direction. The anti-twist guide 12 is configured to be able to be positioned at the lower end of a guide rail 22 extending in the vertical direction. Figure 1 The dashed line) and the running position of the upper end of the guide rail 22 ( Figure 1 The anti-twist guide 12 moves between the solid lines. Specifically, the anti-twist guide 12 is mounted on a component called a converter (not shown), and is configured such that the converter moves along the guide rail 22 via a cylinder (not shown), thereby enabling the anti-twist guide 12 to move. For details, please refer to Japanese Patent Application Publication No. 2016-27218.

[0031] The first heating device 13 is used to heat the yarn Y after it has been twisted by the needle twisting device 15. The first heating device 13 is installed at the upper end of the support frame 7.

[0032] The cooling device 14 is a device for cooling the yarn Y heated by the first heating device 13. The cooling device 14 is arranged between the first heating device 13 and the needle twisting device 15 in the yarn travel direction.

[0033] The needle twisting device 15 is used to twist the yarn Y. The needle twisting device 15 is located on the upper part of the main body 5. Details about the needle twisting device 15 will be explained later.

[0034] The second feed roller 16 is a roller that feeds the yarn Y, twisted by the needle twisting device 15, toward the winding device 17. The second feed roller 16 is disposed in the main body 5 below the needle twisting device 15. The feed speed of the second feed roller 16 on the yarn Y is faster than that of the first feed roller 11 on the yarn Y. Therefore, the yarn Y is stretched between the first feed roller 11 and the second feed roller 16.

[0035] The winding device 17 is a device that imparts winding by spraying air onto the yarn Y. The winding device 17 is disposed in the main body 5 below the second feed roller 16.

[0036] The third feed roller 18 is a roller that feeds the yarn Y, which has been coated by the coating device 17, toward the second heating device 19. The third feed roller 18 is disposed in the main body 5 below the coating device 17. The feed speed of the yarn Y by the third feed roller 18 is slower than that of the second feed roller 16. Therefore, the yarn Y is slack between the second feed roller 16 and the third feed roller 18.

[0037] The second heating device 19 is a device for heating the yarn Y fed from the third feed roller 18. The second heating device 19 is disposed in the main body 5 below the third feed roller 18.

[0038] The fourth feed roller 20 is used to feed the yarn Y, which has been heat-treated by the second heating device 19, toward the winding device 21. The fourth feed roller 20 is located at the lower part of the winding body 6. The feed speed of the fourth feed roller 20 to the yarn Y is slower than that of the third feed roller 18. Therefore, the yarn Y is slack between the third feed roller 18 and the fourth feed roller 20.

[0039] In the processing section 3 configured as described above, the yarn Y stretched between the first feed roller 11 and the second feed roller 16 is twisted by the needle twisting device 15. The twist formed by the needle twisting device 15 propagates to the anti-twist guide 12, but does not propagate upstream of the anti-twist guide 12 in the direction of yarn travel. The yarn Y, thus stretched and twisted, is heated by the first heating device 13 and then cooled by the cooling device 14 to achieve heat fixation. The yarn Y that has passed through the needle twisting device 15 will untwist before reaching the second feed roller 16. However, since the twist of the yarn Y is heat-fixed as described above, each filament maintains a wavy false twist state. Then, the yarn Y, which has been twisted by the winding device 17 and heat-fixed by the second heating device 19, is wound by the winding device 21.

[0040] In the false twisting machine 1 of this embodiment, a cutter 23, a tension sensor 24, a suction tube 25, and a wire breakage sensor 26 are also provided on the wire channel. The cutter 23 is disposed upstream of the first feed roller 11 in the wire travel direction and is used to cut the wire Y. The tension sensor 24 is disposed downstream of the needle twisting device 15 in the wire travel direction and measures the tension of the twisted wire Y. The suction tube 25 is disposed on the main body 5 at a position lower than the third feed roller 18 and is used to temporarily attract and hold the wire Y during the wire hanging operation. The wire breakage sensor 26 is disposed downstream of the fourth feed roller 20 in the wire travel direction and detects wire breakage by detecting whether there is wire Y. In addition, the arrangement of these devices is not limited to the positions described here.

[0041] Furthermore, a notification unit 27 is provided on the upper part of the main body 5. In this embodiment, the notification unit 27 is composed of a lamp, and by switching the lamp to an on or flashing state (notification state) under certain conditions, the specified information can be notified to the operator. However, the specific configuration of the notification unit 27 is not limited to this, for example, the specified information can also be notified to the operator through sound information from a speaker, text information displayed on a screen, etc.

[0042] (Electrical Configuration) Figure 2 This is a block diagram showing the electrical configuration of the false twisting machine 1. For example... Figure 2 As shown, the false twisting processing machine 1 has a control unit 30 that controls the operation of each device in the multiple processing units. Figure 2 Due to paper space limitations, only the devices in processing unit A are shown in the diagram. Detailed diagrams for processing units B and beyond are omitted.

[0043] Output signals from tension sensor 24 and filament breakage sensor 26 are sent to control unit 30. Control unit 30 controls the operation of cutter 23, notification unit 27, and the motor 54 of needle twisting device 15 (described later) based on these output signals. Furthermore, motor 54 is configured such that its operation is not only controlled by control unit 30 but can also be switched by an operator operating operation unit 32. Additionally, a setting unit 31 is connected to control unit 30 for the operator to input various settings. Setting unit 31 can be, for example, a touch panel, but can also be a keyboard or other configuration.

[0044] (Needle-type twisting device) Figure 3 This is a schematic diagram showing the configuration of the needle twisting device 15. Figure 4 From Figure 3The diagram shows the needle twisting device 15 viewed from direction IV. The needle twisting device 15 twists the yarn Y traveling inside the cylindrical needle 41 by rotating it around an axis. Furthermore, in... Figure 3 In the middle, the Y-shaped thread travels downwards from top to bottom. Furthermore, in... Figure 4 The diagram of guide component 52 is omitted.

[0045] The needle-type twisting device 15 has two rotating shafts 43 and 44 rotatably supported on a support member 42 via bearings (not shown). Two axially separated rollers 45 and 46 are mounted on the rotating shaft 43. Two axially separated rollers 47 and 48 are mounted on the rotating shaft 44. Rollers 45 and 47 are axially positioned at the same location, and as shown... Figure 4 As shown, they are slightly separated in a manner that does not contact each other. The positional relationship between rollers 46 and 48 is the same as that between rollers 45 and 47. The rotating shaft 43 is driven to rotate about the shaft by power transmitted from the motor 54.

[0046] The needle 41 is a cylindrical component extending axially, and the thread Y travels inside the needle 41. A magnetic part 41a, opposing the magnets 49 and 50 (described later), is formed at the middle of the axial direction of the needle 41. Furthermore, at one end of the needle 41 axially (the downstream end in the direction of thread travel), a winding part 41b extending in the diametrical direction is fixed inside. One turn of the thread Y is wound in the winding part 41b, and the thread Y is twisted by the rotation of the needle 41 around its axis.

[0047] A magnet 49 is arranged axially between rollers 45 and 46. Similarly, a magnet 50 is arranged axially between rollers 47 and 48. Magnets 49 and 50 are connected via bracket 51 (see reference). Figure 4 The needle 41 is fixed to the support member 42. When the needle 41 is inserted between the rollers 45 (46) and 47 (48) with the magnetic part 41a of the needle 41 facing the magnets 49 and 50, as shown... Figure 4 As shown, needle 41 is held by magnets 49 and 50. Specifically, needle 41 is held by magnets 49 and 50 while being clamped by rollers 45 (46) and 47 (48) and in contact with the circumferential surfaces of rollers 45 (46) and 47 (48). Needle 41 is not mechanically fixed relative to other components, but is held solely by the magnetic force of magnets 49 and 50 and the frictional force with the circumferential surfaces of each roller 45-48.

[0048] An annular guide member 52 is disposed upstream of the needle 41 in the direction of thread travel. The guide member 52 is fixed to the support member 42 via a bracket (not shown). Furthermore, a tubular guide member 53 is disposed downstream of the needle 41 in the direction of thread travel. 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 those described herein and can be appropriately modified.

[0049] like Figure 4 As shown, when the roller 45 is rotated by rotating the drive shaft 43, the needle 41, which is in contact with the circumferential surface of the roller 45, rotates passively in the opposite direction to the roller 45. Furthermore, the roller 47, which is in contact with the circumferential surface of the needle 41, rotates passively in the same direction as the roller 45. The needle 41 is driven to rotate about the shaft, thereby twisting the yarn Y. At this time, as... Figure 4 As indicated by the middle arrow, the rotation direction of the rotating shaft 43, which is driven by the power transmitted from the motor 54, is preferably such that the needle 41 is pressed between the rollers 45 (46) and 47 (48) respectively mounted on the two rotating shafts 43 and 44. This prevents the needle 41 from moving away from the rollers 45 (46) and ensures that the power of the motor 54 is reliably transmitted to the needle 41 via the rollers 45 (46).

[0050] However, the twist imparted to the yarn Y includes S-twist and Z-twist, where the twisting directions are opposite to each other. To change the twisting direction, simply switch the destination of the power transmission from the motor 54 from the rotating shaft 43 to the rotating shaft 44. For example, when transmitting power from the motor 54 via a belt, simply switch the belt wound on the rotating shaft 43 to the rotating shaft 44. Furthermore, although there is a possibility that the needle 41 may easily move away from the roller 45 (46), the motor 54 can also be made capable of rotating in both directions. By switching the rotation directions of the rotating shafts 43 and 44, the rotation direction of the needle 41 can be changed, thereby changing the twisting direction of the yarn Y.

[0051] (Motor stop control) In the false twisting machine 1 configured as described above, during the production of the package P (winding of the yarn Y), yarn breakage may sometimes occur in a certain processing unit. When a yarn breakage occurs, if the motor 54 (needle 41) of the needle twisting device 15 of that processing unit continues to rotate, it may waste electricity or cause wear and tear on the components constituting the needle twisting device 15, resulting in a shortened lifespan. Furthermore, since the needle 41 is held only by magnets 49 and 50, when the needle 41 continues to rotate while the yarn Y is broken, the needle 41 may sometimes detach and fall for some reason. The falling needle 41 may also cause damage to other devices or result in the loss of the needle 41.

[0052] Therefore, in this embodiment, the needle twisting device 15 of each processing unit can be driven independently by the motor 54, and the motor 54 of each needle twisting device 15 can be automatically stopped by the control unit 30. Figure 5 This is a flowchart illustrating the motor control of the needle twisting device 15 in the roll production process. The control unit 30 executes commands on the needle twisting devices 15 of each processing unit. Figure 5 The controls shown.

[0053] In the production of packaged P, when a filament breakage occurs in a certain processing unit ("Yes" in step S1), the filament breakage sensor 26 detects the situation and outputs a filament breakage signal from the sensor 26 to the control unit 30. Upon receiving the filament breakage signal, the control unit 30 sends a stop command to the motor 54 of the needle twisting device 15 in that processing unit, stopping the rotation of the motor 54 (needle 41) (step S2). Furthermore, when the motor 54 is stopped, the control unit 30 switches the notification unit 27 to notification mode. Thus, the operator can identify when a filament breakage has occurred and the rotation of the needle 41 has stopped.

[0054] The acceleration and deceleration of needle 41 can be freely set by the operator via setting unit 31. In this embodiment, the deceleration of needle 41 when it stops is set to -80000 rpm / s, and the acceleration of needle 41 when it accelerates is set to 14000 rpm / s. However, the deceleration and acceleration of needle 41 can be appropriately changed.

[0055] However, when the tension of the yarn Y becomes too high or too low, the possibility of yarn breakage or quality deterioration of the package P increases. Therefore, even if no yarn breakage occurs in a certain processing unit (No in step S1), when the tension detected by the tension sensor 24 exceeds the predetermined upper limit or falls below the lower limit (Yes in step S3), the control unit 30 activates the cutter 23 of that processing unit to cut the yarn Y (step S4). This prevents accidental yarn breakage and the production of low-quality packages P. Furthermore, the aforementioned upper and lower limits can be freely set by the operator via the setting unit 31.

[0056] When the needle 41 of the needle twisting device 15 continues to rotate after the thread Y has been cut, various problems will occur as described above, similar to the case of thread breakage. Therefore, after the cutter 23 cuts the thread Y, the control unit 30 sends a stop command to the motor 54, stopping the rotation of the motor 54 (needle 41) (step S5). Furthermore, when the motor 54 is stopped, the control unit 30 switches the notification unit 27 to the notification state. Thus, the operator can recognize that the thread Y has been cut and the rotation of the needle 41 has stopped.

[0057] In a certain processing unit, during the period when no filament breakage occurs and the tension of the filament Y is within the allowable range between the lower and upper limits, the winding unit 4 winds up the filament Y that has undergone false twisting by the processing unit 3 to form a high-quality package P.

[0058] (Effect) In this embodiment, when a broken wire is detected by the wire breakage sensor 26, the control unit 30 automatically stops the motor 54 of the needle twisting device 15. Therefore, the rotation of the needle 41 can be quickly stopped when a broken wire occurs without waiting for the operator to stop the motor 54.

[0059] In this embodiment, when the tension of the yarn Y detected by the tension sensor 24 exceeds a predetermined upper limit or falls below a predetermined lower limit, the control unit 30 causes the cutter 23 to cut the yarn Y and stops the motor 54 of the needle twisting device 15. When the tension of the yarn Y becomes too high or too low, the possibility of yarn breakage or deterioration of the quality of the package P increases. Therefore, by cutting the yarn Y by the cutter 23 when the tension of the yarn Y exceeds the predetermined upper limit or falls below the lower limit, accidental yarn breakage and production of low-quality packages P can be suppressed. Furthermore, by stopping the motor 54 of the needle twisting device 15 at this time, the needle 41 can be prevented from continuing to rotate uselessly while the yarn Y is cut.

[0060] In this embodiment, when the tension of the thread Y detected by the tension sensor 24 exceeds the upper limit or falls below the lower limit, the control unit 30 sends a stop command to the motor 54 of the needle twisting device 15 after the cutter 23 cuts the thread Y. From the viewpoint of avoiding the needle 41 from rotating unnecessarily, it is preferable to stop the motor 54 as soon as possible. However, if the motor 54 begins to decelerate before the thread Y is cut by the cutter 23, the balance between the traveling speed of the thread Y and the rotational speed of the needle 41 is disrupted, and the needle 41 may detach due to the unstable movement of the thread Y. Therefore, as described above, by sending a stop command to the motor 54 after the thread Y is cut by the cutter 23, the motor 54 will not begin to decelerate before the thread Y is cut, thus preventing the needle 41 from detaching.

[0061] In this embodiment, the absolute value of the deceleration of the needle 41 when it stops is greater than the absolute value of the acceleration of the needle 41 when it accelerates. Thus, by making the deceleration of the needle 41 relatively large, the rotation of the needle 41 can be stopped quickly, and the time during which the needle 41 rotates uselessly in the state of broken yarn can be shortened.

[0062] In this embodiment, a notification unit 27 is also provided, which can be switched to a notification state to notify the operator of specified information. When the control unit 30 stops the motor 54 of the needle twisting device 15, the notification unit 27 is switched to a notification state (the light is on or flashing). In this way, the operator can easily identify the situation where a filament breakage has occurred or the filament Y has been cut, and can quickly begin the operation to restart the winding of the filament Y.

[0063] In this embodiment, multiple processing units are arranged in a row. Each processing unit forms a yarn channel via a needle twisting device 15 and a yarn breakage sensor 26. The control unit 30 stops the motor 54 of the needle twisting device 15 in the processing unit where a yarn breakage is detected by the yarn breakage sensor 26. In the conventional configuration of a false twisting processing machine 1 with multiple processing units arranged in a row, a common tangential drive belt is wound on the drive shaft of the needle twisting device 15 in each processing unit, and each needle twisting device 15 is driven together. Therefore, the tangential drive belt will not stop due to a yarn breakage in a certain processing unit, and an operator will not need to rush to that processing unit to manually detach the drive shaft of the needle twisting device 15 from the tangential drive belt. In this respect, according to this embodiment, when a yarn breakage occurs, the control unit 30 automatically stops the motor 54 of the needle twisting device 15 in that processing unit, thus reducing the burden on the operator and enabling a reliable and rapid stop of the needle 41's rotation.

[0064] (Other implementation methods) This section describes variations of the above-described implementation with various modifications.

[0065] (1) In the above embodiment, a wire breakage sensor 26 is provided separately from the tension sensor 24, and wire breakage is detected by the wire breakage sensor 26. However, since wire breakage can also be detected by the tension sensor 24, the wire breakage sensor 26 can be omitted, and wire breakage can be detected by the tension sensor 24. In this case, the tension sensor 24 also functions as the wire breakage sensor of the present invention.

[0066] (2) In the above embodiment, when the tension detected by the tension sensor 24 exceeds the predetermined upper limit or is less than the lower limit, a stop command is sent to the motor 54 of the needle twisting device 15 after the yarn Y is cut by the cutter 23. However, a stop command may also be sent to the motor 54 at the same time as or immediately before the yarn Y is cut by the cutter 23.

[0067] (3) In the above embodiment, the notification unit 27 is switched to the notification state when the wire breaks or the wire is cut. However, it is not necessary to switch the notification unit 27 to the notification state when the wire breaks or the wire is cut, and the notification unit 27 may be omitted.

[0068] (4) In the above embodiment, the notification unit 27 and the operation unit 32 are provided separately. However, the operation unit 32 may also be configured to have the function of the notification unit 27. For example, as in the above embodiment, if the operation unit 32 is composed of a button, the button may be configured to be able to light up or flash, thereby enabling it to function as a notification unit.

[0069] (4) In the needle twisting device 15 of the above embodiment, only one of the two rotating shafts 43 and 44 is driven by the motor 54. However, it can also be configured such that both rotating shafts 43 and 44 are driven by rotation. In this case, even without changing the belt winding, the S twist and Z twist can be easily switched.

[0070] (5) Various modifications can be made to the various devices constituting the false twisting processing machine 1 of the above embodiment. For example, in the above embodiment, the anti-twist guide 12 can be moved by the converter, but the anti-twist guide 12 can also be fixed (see Japanese Patent Application Publication No. 2011-47074), or the converter can be moved manually. In addition, the cooling device 14 and the second heating device 19 can also be omitted.

Claims

1. A false twisting machine comprising a needle-type twisting device having a cylindrical needle held in contact with the circumferential surfaces of rollers respectively mounted on two rotating shafts, wherein at least one of the two rotating shafts is rotated by a motor, thereby rotating the needle to twist a filament traveling inside the needle, the false twisting machine being characterized in that it comprises: A wire breakage sensor detects broken wires. The control unit controls the operation of the aforementioned motors; Tension sensors detect the tension of the yarn; and Cutter, cuts the thread. When the aforementioned wire breakage sensor detects a wire breakage, the aforementioned control unit stops the aforementioned motor. When the tension of the thread detected by the tension sensor exceeds the specified upper limit or falls below the specified lower limit, the control unit sends a stop command to the motor after cutting the thread with the cutter.

2. The false twisting processing machine as described in claim 1, characterized in that, The needle is held by a magnet while being clamped by the two rollers and in contact with the circumferential surfaces of the two rollers. The needle is not mechanically fixed to other components, but is held in place solely by the magnetic force of the magnet and the frictional force with the circumferential surfaces of the two rollers.

3. The false twisting processing machine as described in claim 1, characterized in that, The absolute value of the deceleration of the needle when it stops is greater than the absolute value of the acceleration of the needle when it accelerates.

4. The false twisting processing machine as described in claim 2, characterized in that, The absolute value of the deceleration of the needle when it stops is greater than the absolute value of the acceleration of the needle when it accelerates.

5. The false twisting processing machine as described in any one of claims 1 to 4, characterized in that, It also has a notification department that can be switched to notify operators of specified information. When the control unit stops the motor, it switches the notification unit to the notification state.

6. The false twisting processing machine as described in any one of claims 1 to 4, characterized in that, Multiple processing units are arranged in an array, each forming a yarn channel via the aforementioned needle-type twisting device and the aforementioned yarn breakage sensor. The aforementioned control unit stops the motor of the needle twisting device of the aforementioned processing unit when the aforementioned wire breakage sensor detects a wire breakage.

7. The false twisting processing machine as described in claim 5, characterized in that, Multiple processing units are arranged in an array, each forming a yarn channel via the aforementioned needle-type twisting device and the aforementioned yarn breakage sensor. The aforementioned control unit stops the motor of the needle twisting device of the aforementioned processing unit when the aforementioned wire breakage sensor detects a wire breakage.

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