TWI877453B - Fake Twist Processing Machine - Google Patents

Abstract

In a false-twisting machine equipped with a pin-type twisting device, the pins are prevented from falling off when the yarn is cut during false-twisting. The false twisting machine (1) has a spindle-type twisting device (15) for twisting the yarn (Y) traveling inside the rotating needle spindle (41), and is equipped with a deceleration device capable of decelerating the rotation speed of the needle spindle (41) from the production rotation speed during yarn production. The operating part (25) that operates quickly, and the cutter (23) that cuts the thread (Y); the cutter (23) cuts the thread (Y) when the rotation speed of the needle spindle (41) reaches a predetermined cutting speed that is lower than the production speed after performing the deceleration operation.

Description

Fake Twist Processing Machine

The present invention relates to a false twisting machine having a spindle-type twisting device that twists a yarn traveling inside a rotating spindle.

For example, Patent Documents 1 and 2 disclose a false twisting machine having a spindle-type twisting device for twisting a yarn traveling inside a rotating spindle. In such a false twisting machine, when yarn production is completed or an abnormality occurs in the yarn travel, the operator may deliberately cut the yarn. Generally speaking, a false twisting machine is provided with a yarn detection device called a feeler, and is configured to automatically activate a cutter arranged on the yarn passage when the yarn detection device detects that the yarn has disappeared. That is, as long as the operator removes the wire from the wire detection device, the cutter can be activated to cut the wire. [Prior technical literature] [Patent literature]

[Patent Document 1] Japanese Patent Publication No. 2019-157313 [Patent Document 2] Japanese Patent Publication No. 2019-157314

[The problem the invention is trying to solve]

However, if the yarn is cut during yarn production (false twist processing) in a false twist processing machine, the following problems may occur. Because the needle spindle in false twisting is rotated at high speed, the number of twists will increase, or a strong twist will be given to the thread. Therefore, if the thread is cut during thread production, lumps of thread tend to appear at the end of the thread. Furthermore, the wire block acts as a resistance when passing through the needle spindle, causing a large force to act on the needle spindle, which may cause the needle spindle to fall off and be lost. Because needle spindles are expensive, you should try to avoid losing them.

In view of the above problems, an object of the present invention is to suppress the falling off of the needle bar when the yarn is cut during the false twisting process in a false twisting machine equipped with a spindle-type twisting device. [Technical means to solve problems]

The false twisting machine of the present invention has a spindle-type twisting device for twisting a yarn traveling inside a rotating needle spindle, and is characterized in that it is equipped with an implementation capable of decelerating the rotation speed of the needle spindle from the production rotation speed during yarn production. The operating part for the deceleration operation, and the cutter for cutting the yarn; the cutter cuts the yarn when the rotation speed of the needle spindle reaches a predetermined cutting rotation speed that is lower than the production rotation speed after the deceleration operation is performed.

According to the present invention, if the operator performs a deceleration operation on the operating part, after the needle spindle decelerates to the cutting speed, the silk thread is cut by the cutter. Therefore, the number of twists of the yarn during cutting is reduced, and the occurrence of yarn lumps at the end of the cut yarn can be suppressed. Therefore, the end of the yarn can smoothly pass through the needle spindle, and when the yarn is cut during false twisting, the needle spindle can be suppressed from falling off.

In the present invention, the rotation speed of the needle tablet can be maintained constant at the aforementioned cut-off rotation speed.

By keeping the needle speed constant at the cutting speed, the thread can be cut at the target speed, which can more reliably prevent the needle from falling off.

In the present invention, a wire detection device for detecting whether the wire exists can be provided on the downstream side of the aforementioned cutter in the wire travel direction. After the aforementioned cutter cuts the aforementioned wire, if the aforementioned wire detection device detects that the aforementioned wire disappears, the aforementioned needle recovers from the aforementioned cutting rotation speed and slows down.

According to such a structure, even if the rotation speed of the needle tablet is maintained at a certain level at the cut-off speed, the deceleration of the needle tablet can be automatically restored to stop the rotation of the needle tablet.

In the present invention, the rotation speed of the needle spindle can be set to a yarn-hanging rotation speed suitable for threading on the needle-barrel twisting device, and the cutting rotation speed is the same as the yarn-hanging rotation speed.

If the rotation speed of the needle spindle becomes too low, the number of twists of the thread will decrease and the tension will increase, which may cause the thread to break unexpectedly. Therefore, by setting the cutting rotation speed to be the same as the yarn hanging rotation speed at which yarn breakage can be suppressed, yarn breakage can be avoided until the cutting rotation speed is reached.

In the present invention, a plurality of processing units including the spindle-type twisting device can be arranged together, and the operation portion is provided individually for each of the plurality of processing units.

According to such a configuration, the operator needs to move to the processing unit where the thread is to be cut and operate the operation unit of the processing unit. Therefore, it is possible to prevent the thread of other processing units from being accidentally cut.

In the present invention, a plurality of processing units including the spindle-type twisting device can be arranged together, and the operation unit is provided for the plurality of processing units.

According to such a configuration, the thread of any processing unit can be cut from one operation unit. Therefore, it is possible to save the operator the trouble of moving to the processing unit where the thread is to be cut.

Hereinafter, the embodiments of the present invention will be described with reference to the drawings.

(The overall composition of the false twisting machine) FIG. 1 is a schematic diagram showing the structure of the false twisting machine 1 of this embodiment. The false twisting machine 1 is composed of a plurality of processing units 10 (also called spindles) that perform false twisting on the yarn Y and are arranged along the direction perpendicular to the paper surface in FIG. 1 (hereinafter referred to as the machine length direction). Each processing unit 10 is configured to include a yarn supply unit 2 that supplies the yarn Y, a processing unit 3 that performs a false twisting process on the yarn Y supplied from the yarn supply unit 2, and a winding unit 4 that winds the yarn Y subjected to the false twisting process in the processing unit 3 to form a package P.

The yarn supply part 2 supplies the yarn Y from the yarn supply package Q to the processing part 3. The processing section 3 performs a false twisting process on the yarn Y traveling along the yarn path. In the processing section 3, a first feed roller 11, a twist stop guide 12, a first heating device 13, a cooling device 14, a spindle twisting device 15, a second feed roller 16, an interlacing device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20 are arranged in this order along the yarn passage from the upstream side in the yarn traveling direction. The winding section 4 winds the yarn Y that has been falsely twisted in the processing section 3 by the winding device 21 to form a package P.

The false twisting machine 1 includes a main machine table 5 and a winding table 6 that are arranged to face each other with a gap in the left-right direction of FIG. 1 . The main machine table 5 and the winding table 6 are extended in the length direction of the machine table. The upper part of the main machine table 5 and the upper part of the winding table 6 are connected by a support frame 7 . The devices constituting the processing section 3 of each processing unit 10 are mainly installed on the main machine table 5 and the support frame 7 . The space surrounded by the main machine table 5 , the winding table 6 and the support frame 7 is the working space 8 . The thread Y mainly travels around the work space 8 . The operator performs various operations such as thread hanging work in the work space 8 .

(Processing section) The first wire feeding roller 11 is a roller that conveys the wire Y supplied from the wire feeding section 2 toward the first heating device 13. The first wire feeding roller 11 is arranged on the upper part of the winding table 6. The first wire feeding roller 11 has a driving roller and a driven roller, and conveys the wire Y toward the downstream side of the wire travel direction while the wire Y is clamped between the driving roller and the driven roller. The driving rollers of each processing unit 10 are connected to a common driving shaft and driven synchronously. The second wire feeding roller 16, the third wire feeding roller 18 and the fourth wire feeding roller 20 also have the same structure.

The twist-stop guide 12 prevents the twist imparted to the yarn Y by the spindle-type twisting device 15 from propagating upstream of the twist-stop guide 12 in the yarn traveling direction. The twist prevention guide 12 is arranged between the first yarn feeding roller 11 and the first heating device 13 in the yarn traveling direction.

The first heating device 13 is a device for heating the yarn Y twisted by the spindle type twisting device 15 . The first heating device 13 is attached to the upper end 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 arranged between the first heating device 13 and the spindle twisting device 15 in the yarn traveling direction.

The spindle twisting device 15 is a device for twisting the yarn Y. The needle spindle twisting device 15 is arranged on the upper part of the main machine table 5 . The spindle twisting device 15 of each processing unit 10 is configured to be individually driven by a motor 54 (see FIGS. 2 and 4 ) described below.

The second yarn feeding roller 16 is a roller that conveys the yarn Y twisted by the spindle type twisting device 15 toward the interlacing device 17 . The second feed roller 16 is disposed below the spindle twisting device 15 in the main machine 5 . The conveyance speed of the yarn Y by the second feed roller 16 is faster than the conveyance speed of the yarn Y by the first feed roller 11 . Therefore, the yarn Y is stretched between the first yarn feeding roller 11 and the second yarn feeding roller 16 .

The interlacing device 17 is a device for imparting interlacing to the yarns Y by spraying air. The interlacing device 17 is arranged below the second yarn feeding roller 16 in the main machine 5.

The third wire feeding roller 18 is a roller that conveys the yarn Y interlaced by the interlacing device 17 toward the second heating device 19. The third wire feeding roller 18 is arranged below the interlacing device 17 in the main machine 5. The conveying speed of the yarn Y by the third wire feeding roller 18 is slower than the conveying speed of the yarn Y by the second wire feeding roller 16. Therefore, the yarn Y is relaxed between the second wire feeding roller 16 and the third wire feeding roller 18.

The second heating device 19 is a device for heating the yarn Y fed from the third yarn feeding roller 18. The second heating device 19 is arranged below the third yarn feeding roller 18 in the main machine 5.

The fourth wire feeding roller 20 is a roller that conveys the wire Y heat-treated by the second heating device 19 toward the winding device 21. The fourth wire feeding roller 20 is arranged at the lower part of the winding table 6. The conveying speed of the wire Y by the fourth wire feeding roller 20 is slower than the conveying speed of the wire Y by the third wire feeding roller 18. Therefore, the wire Y is relaxed between the third wire feeding roller 18 and the fourth wire feeding roller 20.

In the processing section 3 configured in this way, the yarn Y stretched between the first yarn feeding roller 11 and the second yarn feeding roller 16 is twisted by the spindle type twisting device 15 . The twist formed by the spindle type twisting device 15 is propagated to the twist-stopping guide 12 but does not propagate to the upstream side of the twist-stopping guide 12 in the yarn traveling direction. The stretched and twisted yarn Y is heated by the first heating device 13 and then cooled by the cooling device 14 to be heat-set. The yarn Y that has passed through the spindle twisting device 15 is untwisted before reaching the second yarn feeding roller 16 . However, since the twist of the yarn Y is heat-set as described above, each filament maintains a wavy false-twisted state. Thereafter, the yarn Y interlaced by the interlacing device 17 and heat-set by the second heating device 19 is wound by the winding device 21 .

In the processing unit 10, a cutter 23 and a wire detection device 24 are further provided on the wire channel. The cutter 23 is arranged on the upstream side of the first wire feeding roller 11 in the wire travel direction and is used to cut the wire Y. The wire detection device 24 is arranged on the downstream side of the fourth wire feeding roller 20 in the wire travel direction and is used to detect whether there is a wire Y. On the main machine 5, a switch 25 (operating part of the present invention) is provided corresponding to each processing unit 10. The switch 25 is used to switch the rotation state of the needle 41. The switch 25 of this embodiment is composed of a button. However, the switch 25 can also be composed of a lever, a dial, etc.

(Needle type twisting device) FIG. 2 is a schematic diagram showing the structure of the needle-type twisting device 15, and FIG. 3 is a view of the needle-type twisting device 15 viewed from the direction III in FIG. 2 . The spindle type twisting device 15 twists the yarn Y traveling inside the spindle 41 by rotating the cylindrical spindle 41 around its axis. Again in Figure 2, the thread Y travels from top to bottom. In FIG. 3 , the guide wire member 52 is not shown.

The spindle type twisting device 15 has two rotation shafts 43 and 44 that are rotatably supported by the support member 42 through bearings (not shown). Two rollers 45 and 46 separated in the axial direction are mounted on the rotating shaft 43 . Two rollers 47 and 48 separated in the axial direction are mounted on the rotating shaft 44 . The roller 45 and the roller 47 are arranged at the same position in the axial direction, and are slightly separated so as not to contact each other as shown in FIG. 3 . Similarly, the roller 46 and the roller 48 are arranged at the same position in the axial direction and are slightly separated so as not to contact each other. The rotating shaft 43 is driven by a motor 54 to rotate around the axis.

The needle spindle 41 is a cylindrical member extending in the axial direction, and the yarn Y travels inside the needle spindle 41 . A magnetic portion 41 a facing magnets 49 and 50 described below is formed in an axially intermediate portion of the needle spindle 41 . Furthermore, at one end in the axial direction of the needle bar 41 (the end on the downstream side in the thread traveling direction), a winding portion 41b extending in the diameter direction is fixed inside. The yarn Y is wound around the winding portion 41b. With this structure, when the needle spindle 41 rotates around its axis, the yarn Y is twisted.

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. 3 ). When the needle tablet 41 is inserted between the roller 45 (46) and the roller 47 (48) in such a manner that the magnetic portion 41a of the needle tablet 41 faces the magnets 49 and 50, as shown in FIG. 3 , the needle tablet 41 is held by the magnets 49 and 50. Specifically, the needle 41 is held by magnets 49 and 50 while being sandwiched between the rollers 45 (46) and 47 (48) and in contact with the circumference of the rollers 45 (46) and 47 (48). The needle 41 is not mechanically fixed to other components, but is held by the magnetic force of the magnets 49 and 50 and the friction force with the circumference of each roller 45 to 48.

A ring-shaped guide wire member 52 is arranged on the upstream side of the needle tablet 41 in the direction in which the thread travels. The guide wire member 52 is fixed to the support member 42 via a bracket (not shown). In addition, a tubular guide wire member 53 is arranged on the downstream side of the needle tablet 41 in the direction in which the thread travels. The guide wire member 53 is directly fixed to the support member 42. However, the shapes and fixing methods of the guide wire members 52 and 53 are not limited to the forms described here, and can be appropriately changed.

As shown by the arrow in FIG. 3 , when the roller 45 is rotated by rotationally driving the rotating shaft 43 , the needle bar 41 in contact with the peripheral surface of the roller 45 is driven to rotate in the opposite direction to the roller 45 . Furthermore, the roller 47 in contact with the peripheral surface of the needle bar 41 is driven to rotate in the opposite direction to the needle bar 41 . In this way, the yarn Y is twisted by driving the needle spindle 41 to rotate around the axis.

(Electrical composition) FIG. 4 is a block diagram showing the electrical configuration of the false twisting machine 1 . In FIG. 4 , due to the paper surface, only the details of one processing unit 10 are shown, but the other processing units 10 have the same structure. The false twisting machine 1 has a control unit 30 that controls the operations of the plurality of processing units 10 . The control unit 30 is connected to a setting unit 31 for the operator to input control programs and various setting values. The setting unit 31 may be configured by, for example, a touch panel, or may adopt other configurations such as a combination of a keyboard and a monitor.

The switch 25 provided in each processing unit 10 is electrically connected to the motor 54 of the needle spindle twisting device 15 and is used to switch the rotation state of the needle spindle 41 . If the switch 25 is pressed while the needle spindle 41 is stopped, the needle spindle 41 will accelerate to a predetermined thread-hanging speed, and will reach a certain speed at the thread-hanging speed. If the switch 25 is pressed while the needle spindle 41 is rotating at the thread hanging speed, the needle spindle 41 will accelerate to the production speed and become a certain speed at the production speed. If the switch 25 is pressed while the needle spindle 41 is rotating at the production speed, the needle spindle 41 will decelerate from the production speed and stop. The thread-hanging rotation speed refers to the rotation speed of the needle spindle 41 suitable for thread-hanging on the needle-type twisting device 15 in a manner that can suppress the occurrence of wire breakage. The production speed is the speed of the needle spindle 41 during silk yarn production (during false twist processing). The thread hanging speed is lower than the production speed.

In this embodiment, if the switch 25 is pressed and held while the needle spindle 41 is rotating at the production speed, the needle spindle 41 decelerates from the production speed and reaches a constant rotation speed at a predetermined cutting speed. That is, long pressing the switch 25 corresponds to the deceleration operation of the present invention. The cutting rotation speed refers to a rotation speed that is low enough to suppress the occurrence of yarn lumps at the end of the yarn Y when the yarn Y is cut with the cutter 23 by reducing the number of twists of the yarn Y. However, if the rotation speed of the needle spindle 41 becomes too low, the number of twists of the yarn Y will become too small and the tension will be too high, which may cause unexpected wire breakage. Therefore, the cutting speed is set to a higher speed from the production speed to the cutting speed to suppress the yarn Y from breaking. In the present embodiment, the cutting speed is set to the same speed as the hanging speed. The production speed and the cutting speed (hanging speed) of the needle 41 can be set through the setting unit 31.

The control unit 30 is electrically connected to the motor 54, switch 25, cutter 23 and wire detection device 24 of each processing unit 10. The control unit 30 controls the operations of the motor 54 and the cutter 23 based on the rotation speed of the motor 54 (that is, the rotation speed of the needle spindle 41) and the detection result of whether there is the yarn Y based on the yarn detection device 24. In addition, the control unit 30 can recognize the rotation state of the spindle 41 of the spindle-type twisting device 15 by recognizing the state of the switch 25 of each processing unit 10. The rotation state of the needle spindle 41 can be switched not only by the switch 25 but also by the control unit 30 .

(Operation when thread is cut) Next, in the false twisting machine 1 configured as above, a series of procedures in which the operator cuts the yarn Y in the processing unit 10 during yarn production will be described. Figure 5 is a flow chart during silk thread cutting. Figure 6 is a timing chart when cutting the silk thread.

To cut the yarn Y of a certain processing unit 10, the operator moves to the processing unit 10 and presses and holds the switch 25 of the processing unit 10. If the switch 25 is long pressed while the needle spindle 41 of the needle spindle twisting device 15 is rotating at the production speed (YES in step S1, time point T1), the needle spindle 41 starts to decelerate (step S2).

The control unit 30 is configured to temporarily stop the deceleration of the needle spindle 41 when the rotation speed of the needle spindle 41 decreases to the cutting rotation speed (YES in step S3, time point T2), and maintain the rotation speed of the needle spindle 41 constant at the cutting rotation speed (step S4). The control unit 30 is configured to operate the cutter 23 to cut the yarn Y while the needle spindle 41 is rotating at the cutting speed (step S5, time T3). In this way, by decelerating the needle spindle 41 to the cutting speed before cutting the yarn Y, the number of twists of the yarn Y during cutting can be reduced. As a result, the occurrence of a lump at the end of the cut thread Y can be suppressed, and the end of the thread Y can be easily passed through the needle 41 smoothly.

If the end of the cut thread Y completely passes through the thread detection device 24, the thread detection device 24 will detect that the thread Y has disappeared. The control unit 30 is configured to restore the deceleration of the needle tablet 41 (step S7) if the thread detection device 24 detects that the thread has disappeared (at time T4 in step S6). Finally, the rotation of the needle tablet 41 is stopped (at time T5).

(Effect) In this embodiment, when the operator performs a deceleration operation using the switch 25 (operating part), the needle spindle 41 decelerates to the cutting speed, and then the yarn Y is cut by the cutter 23 . Therefore, the number of twists of the yarn during cutting is reduced, and the occurrence of yarn lumps at the end of the cut yarn Y can be suppressed. Therefore, the end of the yarn Y can pass through the needle bar 41 smoothly, and when the yarn Y is cut during false twisting, the needle bar 41 can be suppressed from falling off.

In this embodiment, the rotation speed of the needle 41 is kept constant at the cutting speed. By keeping the rotation speed of the needle 41 constant at the cutting speed, the thread Y can be cut at the target speed, so the needle 41 can be more reliably prevented from falling off.

In this embodiment, a thread detection device 24 for detecting the presence of the thread Y is provided on the downstream side of the cutter 23 in the thread travel direction. After the thread Y is cut by the cutter 23, if the thread detection device 24 detects that the thread Y disappears, the needle 41 will be decelerated from the cutting speed. According to such a configuration, even if the speed of the needle 41 once becomes constant at the cutting speed, the deceleration of the needle 41 can be automatically restored, and the rotation of the needle 41 can be stopped.

In this embodiment, the rotation speed of the needle spindle 41 is set to a thread-hanging rotation speed suitable for threading the needle spindle-type twisting device 15, and the cutting rotation speed is the same as the thread-hanging rotation speed. If the rotation speed of the needle spindle 41 becomes too low, the number of twists of the yarn Y decreases and the tension becomes high, which may cause the yarn Y to break unexpectedly. Therefore, by setting the cutting rotation speed to be the same as the thread hanging rotation speed that can suppress the occurrence of thread breakage, the occurrence of thread breakage can be avoided until the cutting rotation speed is reached.

In this embodiment, a plurality of processing units 10 including spindle-type twisting devices 15 are arranged together, and the switches 25 are provided individually for each of the plurality of processing units 10 . According to such a configuration, the operator must move to the processing unit 10 where the yarn Y is to be cut, and operate the switch 25 of the processing unit 10 . Therefore, it is possible to prevent the yarn Y of other processing units 10 from being accidentally cut.

(Other implementation forms) Next, various modifications are made to the above-mentioned implementation forms.

In the above-mentioned embodiment, long pressing the switch 25 is equivalent to the deceleration operation of the present invention. However, the specific aspect of the deceleration operation is not limited thereto. For example, pressing the switch 25 a predetermined number of times within a predetermined time can also be used as the deceleration operation.

In the above-mentioned embodiment, when the thread Y is cut by the cutter 23, the rotation speed of the needle 41 is maintained at the cutting speed. However, when the thread Y is cut, the rotation speed of the needle 41 does not necessarily have to be maintained constant at the cutting speed. The thread Y may be cut while the needle 41 is decelerating.

In the above-mentioned embodiment, when the rotation speed of the needle 41 is maintained at a constant level at the cutting speed, if the thread detection device 24 detects that the thread Y has disappeared, the deceleration of the needle 41 is restored. However, the method of restoring the deceleration of the needle 41 is not limited to this. For example, it may be configured so that the operator operates the switch 25 to restore the deceleration of the needle 41. It may also be configured so that after a predetermined time has passed since the needle 41 reaches the cutting speed, or after a predetermined time has passed since the thread Y is cut, the control unit 30 restores the deceleration of the needle 41. When the wire detection device 24 is not used to determine the deceleration recovery of the needle tablet 41, the wire detection device 24 can be omitted or retained.

In the above-mentioned embodiment, the cutting speed is set to the same speed as the thread hanging speed. However, the cutting speed may be set to be different from the thread hanging speed.

In the above-mentioned embodiment, the switch 25 provided in each processing unit 10 serves as the operating unit of the present invention. However, it is also possible to configure a common operating unit for a plurality of processing units 10. For example, the setting unit 31 can serve as the common operating unit. In this case, it is sufficient to select the processing unit 10 for cutting the thread Y in the setting unit 31 and start the needle 41 of the processing unit 10 to decelerate. It is also possible to configure that if a plurality of processing units 10 for cutting the thread Y are selected in the setting unit 31, all the needles 41 of the selected plurality of processing units 10 start to decelerate. According to such a configuration, the thread Y of any processing unit 10 can be cut from one setting unit 31. Therefore, it is possible to save the operator the trouble of moving to the processing unit 10 where the yarn Y is to be cut. In this case, the operation of selecting the processing unit 10 to cut the yarn Y in the setting section 31 corresponds to the deceleration operation of the present invention. Furthermore, when the yarn Y is to be cut in a plurality of processing units 10, the timing at which the control unit 30 issues instructions to each spindle-type twisting device 15 may be at the same time or at different time points.

1: False twist processing machine 10: Processing unit 15: Needle spindle twisting device 23:Cutter 24: Silk detection device 25:Switch (operating part) 30:Control Department 31: Setting Department 41: Needle spindle 54: Motor Y: silk thread

[Fig. 1] is a schematic diagram showing the structure of the false twisting machine according to this embodiment. [Fig. 2] is a schematic diagram showing the structure of a spindle type twisting device. [Fig. 3] is a diagram of the spindle-type twisting device viewed from the direction III in Fig. 2. [Fig. 4] is a block diagram showing the electrical configuration of the false twisting machine. [Fig. 5] Flow chart when cutting the tying thread. [Fig. 6] Timing chart when cutting the tying thread.

1: Fake hair processing machine

10: Processing unit

15: Needle tablet twisting device

23: Cutter

24: Wire detection device

25: Switch (operating part)

30: Control Department

31: Setting Department

54: Motor

Claims (8)

A false twisting machine having a spindle-type twisting device for twisting a yarn traveling inside a rotating needle spindle, characterized in that it is equipped with an implementation capable of decelerating the rotation speed of the needle spindle from the production rotation speed during yarn production. An operating part for deceleration operation, and a cutter for cutting the yarn; the cutter cuts the yarn when the rotation speed of the needle spindle reaches a predetermined cutting rotation speed that is lower than the production rotation speed after the deceleration operation is performed. The false twisting machine according to claim 1, wherein the rotation speed of the needle spindle is maintained constant at the cutting rotation speed. The false twist processing machine according to claim 2, wherein a thread detection device for detecting whether or not the thread is present is provided on the downstream side of the cutter in the thread traveling direction. After the thread is cut by the cutter, if the thread detection device detects that the thread disappears, the needle spindle resumes deceleration from the cutting speed. The false twisting machine according to claim 1, wherein the rotation speed of the needle spindle is set to a thread hanging speed suitable for threading on the needle spindle twisting device, and the cutting speed is the same as the thread hanging speed. The false twisting machine according to claim 2, wherein the rotation speed of the needle spindle is set to a speed suitable for the needle spindle. The thread hanging speed of the twisting device when hanging the thread, the aforementioned cutting speed is the same as the aforementioned thread hanging speed. The false twisting machine according to claim 3, wherein the rotation speed of the needle spindle is set to a thread hanging speed suitable for threading on the needle spindle type twisting device, and the cutting speed is the same as the thread hanging speed. The false twisting machine according to any one of claims 1 to 6, wherein a plurality of processing units including the spindle-type twisting device are arranged together, and the operation unit is provided individually for each of the plurality of processing units. The false twisting machine according to any one of claims 1 to 6, wherein a plurality of processing units including the spindle-type twisting device are arranged together, and the operation unit is provided jointly for the plurality of processing units.

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