JP7128574B2 - False twisting machine - Google Patents

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 (a pin twister type false twisting device in Patent Document 1) that imparts a twist to yarn running inside a rotating pin (a spinner in Patent Document 1). . In this pin-type twisting device, rollers are attached to two rotating shafts, and cylindrical pins are held by magnets while being in contact with the peripheral surfaces of the respective rollers. When at least one of the rotating shafts is driven to rotate by a motor, the pin in contact with the roller rotates around the shaft, and the yarn running inside the pin is twisted.

When yarning is performed on such a false twisting machine, yarning is first performed on a pin-type twisting device. Subsequently, while the pin-type twisting device is in operation, the yarn is threaded onto a feed roller or the like. At this time, if the number of rotations of the pins is increased to the number of rotations during production at once, yarn breakage is likely to occur. For example, Patent Literature 2 discloses that the rotation speed of a motor that rotates a pin is configured to be variable, and the rotation speed of the motor is initially reduced.

JP-A-2002-69763 JP-A-50-25839

Patent Document 2 describes a motor (Figs. 1 to 5) capable of changing the number of revolutions in a plurality of steps and a motor capable of changing the number of revolutions steplessly (continuously) as a drive motor for a pin-type twisting device. A motor (FIG. 6) is disclosed. However, the motor described in Japanese Patent Application Laid-Open No. 2002-300002, in which the number of revolutions can be switched in a plurality of steps, has a configuration in which a plurality of set values are fixed and the set values cannot be freely changed. For this reason, it was not possible to adapt to changes in the type of yarn and production conditions, resulting in poor versatility. Further, when a motor capable of steplessly changing the number of revolutions is employed, the adjustment of the number of revolutions is left to the operator. For this reason, if the operator is inexperienced, he/she cannot make a delicate adjustment of the number of revolutions, which causes a problem of frequent threading failures.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to improve versatility of a false twisting machine equipped with a pin-type twisting device and to facilitate yarn threading regardless of the operator's skill level. and

The present invention has a cylindrical pin held in contact with the peripheral surface of a roller attached to each of two rotating shafts, and at least one of the two rotating shafts is rotated by a motor. A false twisting machine comprising a pin-type twisting device that rotates the pins to apply twist to yarn running inside the pins, wherein the number of rotations of the pins is as follows: A setting unit for setting at least set values for a high speed rotation speed that is the speed during yarn production and a low speed rotation speed that is lower than the high speed rotation speed; and an operation unit for switching to the low rotation speed.

In the present invention, since the setting section for setting the set values for the high speed rotation speed and the low speed rotation speed is provided, the rotation speed of the pin (motor) can be freely changed via the setting section. Therefore, it is possible to respond to changes in the type of yarn and production conditions. Further, since the rotation speed of the pin (motor) can be switched between preset high speed rotation speed and low speed rotation speed by means of the operation unit, delicate adjustment of the rotation speed by the operator is unnecessary. Therefore, according to the present invention, the versatility of the false twisting machine can be improved, and the threading can be easily performed regardless of the skill level of the operator.

In the present invention, it is preferable that the acceleration of the pin can be set via the setting section.

If the acceleration of the pins of the pin-type twisting device is too high, yarn breakage tends to occur during acceleration, but the maximum acceleration varies depending on the type of yarn and production conditions. Therefore, by allowing the acceleration of the pin (motor) to be freely set, it is possible to suppress the occurrence of yarn breakage during acceleration of the pin regardless of the type of yarn or the production conditions.

In the present invention, it is preferable that the acceleration of the pin is set to 80,000 rpm/s or less.

Although it depends on the type of yarn, when the acceleration of the pin is generally 80,000 rpm/s or less, it is possible to satisfactorily suppress the occurrence of yarn breakage during acceleration of the pin.

In the present invention, it is preferable that the low-speed rotation speed is set to a rotation speed equal to or less than 1/2 of the high-speed rotation speed.

By suppressing the number of low-speed rotations to 1/2 or less of the number of high-speed rotations, it is possible to reduce the number of twists of the yarn during low-speed rotation and suppress yarn swinging, so that yarn threading can be performed well.

In the present invention, each time the operating section is operated, the number of rotations of the pin is switched in order from a low number of rotations to a high number of rotations among the number of rotations corresponding to the setting value set in the setting section. It's good to go.

According to such a configuration, by operating the operating portion in accordance with the progress of the threading operation, for example, the pin can be switched in the order of stopped state→low speed rotation→high speed rotation. Therefore, it is possible to eliminate mistakes such as erroneously accelerating the pin from a stopped state to a high rotational speed at once.

In the present invention, it is preferable that the rotation direction of the rotating shaft that is rotationally driven by the motor is the direction in which the pin is pushed between the rollers attached to the two rotating shafts.

With such a configuration, it is possible to prevent the pin from being separated from the roller attached to the rotating shaft that is rotationally driven by the motor, and the power of the motor is reliably transmitted to the pin via the roller. Therefore, the number of rotations of the pin can be accurately controlled.

In the present invention, a tension sensor that measures the tension of the yarn and is arranged downstream of the pin-type twisting device in the direction of yarn running; and should be provided.

During the yarn threading operation to the false twisting machine, the tension of the yarn suddenly changes, and yarn breakage may occur. Therefore, by appropriately executing a predetermined control based on the tension of the yarn, it is possible to perform the yarn threading operation satisfactorily while suppressing yarn breakage.

In the present invention, a predetermined first tension is set for the yarn tension as the set value for the low speed rotation speed, and when the pin is accelerating from a stopped state, the tension measured by the tension sensor is When the tension is reduced to the first tension, the controller may stop accelerating the motor.

Since the tension in the yarn decreases as the pins of the pin-type twisting device accelerate, it is also possible to set the low speed rotation speed by the yarn tension instead of the rotation speed itself. In this case, the number of revolutions when the tension of the yarn is reduced to the first tension becomes the low number of revolutions. By setting the first tension to a sufficiently low value, it is possible to suppress the occurrence of yarn breakage even if the yarn is hooked to the feed roller during low-speed rotation and the tension suddenly increases.

The present invention further comprises a notification unit switchable to a notification state for notifying an operator of predetermined information, wherein when the pin is accelerating from a stopped state, the tension measured by the tension sensor is the first tension. , the control unit may switch the notification unit to the notification state.

By notifying the operator that the tension of the yarn has decreased to the first tension in this manner, the operator can quickly proceed with the yarn threading operation.

In the present invention, an informing section that can be switched to an informing state for informing the operator of predetermined information is further provided, a predetermined second tension is set with respect to the tension of the yarn, and the pin is accelerated from the low rotation speed. When the tension measured by the tension sensor decreases to the second tension when the tension sensor is on, the control unit may switch the notification unit to the notification state.

After starting to accelerate the rotation speed of the pins of the pin-type twisting device from a low rotation speed, in order to avoid yarn breakage due to the increase in tension when threading, the rotation speed of the motor should be sufficiently high and the tension of the yarn It is necessary to perform threading after the thread has fallen sufficiently. In the past, the operator judged by the sound of the motor that the number of rotations of the motor had become sufficiently high, but that would result in large individual differences. Therefore, as described above, if the configuration is such that the operator is notified that the tension measured by the tension sensor has decreased to the predetermined second tension, the operator can appropriately set the second tension. Threading can be performed on the feed roller or the like at the appropriate timing.

In the present invention, when the tension measured by the tension sensor decreases to the second tension while the pin is accelerating from the low rotation speed, the control unit preferably stops accelerating the motor.

In this way, by maintaining the number of rotations of the motor at the number of rotations when the tension of the yarn is lowered to the second tension, the yarn can be threaded in a state where the number of twists of the yarn is constant and stable. .

1 is a schematic diagram showing the configuration of a false twisting machine according to the present embodiment; FIG. FIG. 2 is a block diagram showing an electrical configuration of a false twisting machine; 1 is a schematic diagram showing the configuration of a pin-type twisting device; FIG. FIG. 4 is a view of the pin-type twisting device viewed from the IV direction of FIG. 3; 4 is a flow chart showing the flow of threading work. 4 is a graph showing changes in the number of rotations of pins of a pin-type twisting device. It is a schematic diagram showing the procedure of threading work. It is a schematic diagram showing the procedure of threading work. 4 is a graph showing changes in the number of rotations of pins of a pin-type twisting device.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Overall Configuration of False Twisting Machine)
FIG. 1 is a schematic diagram showing the configuration of a false twisting machine 1 according to this embodiment. As shown in FIG. 1, the false twisting machine 1 includes a yarn supplying section 2 that supplies a plurality of yarns Y, and a processing section 3 that performs false twisting on the plurality of yarns Y supplied from the yarn supplying section 2. and a winding section 4 for winding a plurality of yarns Y false twisted in the processing section 3 to form a plurality of packages P.

The yarn supplying section 2 has a creel stand 10 that holds a plurality of yarn supplying packages Q, and supplies a plurality of yarns Y to the processing section 3 . The processing unit 3 includes, in order from the upstream side in the yarn traveling direction, a first feed roller 11, a twist stop 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, a third feed roller 18, a second heating device 19, and a fourth feed roller 20 are arranged along the yarn path. The winding section 4 forms a plurality of packages P by winding a plurality of yarns Y false-twisted by the processing section 3 with a plurality of winding devices 21 .

The false twisting machine 1 has a main frame 5 and a winding frame 6 which are opposed to each other with a gap in the lateral direction of FIG. 1 (hereinafter referred to as the width direction of the frame). The main machine base 5 and the winding base 6 extend in a direction perpendicular to the plane of FIG. 1 (hereinafter referred to as a 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 section 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 run mainly around the work space 8 . An operator performs various operations such as threading in the work space 8 .

The false twisting machine 1 has a unit called a span including a set of a main machine base 5 and a winding base 6 which are arranged opposite to each other. In one span, a plurality of processing units (also referred to as weights) having yarn paths formed so as to pass through the respective devices constituting the processing section 3 are arranged side by side in the longitudinal direction of the machine base. As a result, in one span, a plurality of yarns Y running side by side in the longitudinal direction of the machine can be subjected to false twisting at the same time. The false twisting machine 1 has a symmetrical span in the width direction of the machine around the main machine 5 (the main machine 5 has a common span on the left and right sides), and is arranged in the longitudinal direction of the machine. It has a configuration in which multiple 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 section 2 toward the first heating device 13 . The first feed roller 11 is arranged above the winding table 6 . The first feed roller 11 has a drive roller and a driven roller, and the drive roller is rotationally driven with the yarn Y sandwiched between the drive roller and the driven roller, causing the yarn Y to travel. send in the downstream direction. In one span each drive roller is connected to a common drive shaft. Each driven roller can be switched between a state in which it is in contact with the corresponding driving roller (a state in which the yarn Y is sandwiched and the yarn Y is fed) and a state in which the driven roller is separated (a state in which the yarn can be hooked), for example, by operating a lever by an operator. can be done. The second feed roller 16, the third feed roller 18 and the fourth feed roller 20 also have the same configuration.

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

The first heating device 13 is a device for heating the yarn Y twisted by the pin-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 pin-type twisting device 15 in the yarn running direction.

The pin-type twisting device 15 is a device for twisting the yarn Y. As shown in FIG. The pin-type twisting device 15 is arranged above 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 twisted by the pin-type twisting device 15 toward the interlacing device 17 . The second feed roller 16 is arranged below the pin-type twisting device 15 on the main machine base 5 . The speed at which the yarn Y is conveyed by the second feed roller 16 is higher than the speed at which the yarn Y is conveyed by the first feed roller 11 . Therefore, the yarn Y is drawn between the first feed roller 11 and the second feed roller 16 .

The entangling device 17 is a device that entangles the yarn Y by injecting air. The entangling device 17 is arranged below the second feed rollers 16 on the main machine base 5 .

The third feed roller 18 is a roller that feeds the yarn Y entangled by the entangling device 17 toward the second heating device 19 . The third feed roller 18 is arranged below the interlacing device 17 on the main machine base 5 . The speed at which the yarn Y is conveyed by the third feed roller 18 is slower than the speed at which the yarn Y is conveyed by the second feed roller 16 . Therefore, the yarn Y is slackened 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 fed from the third feed roller 18 . The second heating device 19 is arranged below the third feed roller 18 in the main machine base 5 .

The fourth feed roller 20 is a roller that feeds the yarn Y heat-treated by the second heating device 19 toward the winding device 21 . The fourth feed roller 20 is arranged below the winding table 6 . The speed at which the yarn Y is conveyed by the fourth feed roller 20 is slower than the speed at which the yarn Y is conveyed by the third feed roller 18 . Therefore, the yarn Y is slackened between the third feed roller 18 and the fourth feed roller 20. As shown in FIG.

In the processing section 3 configured as described above, the yarn Y drawn between the first feed roller 11 and the second feed roller 16 is twisted by the pin-type twisting device 15 . The twist formed by the pin-type twisting device 15 is propagated up to the twist stop guide 12, but is not propagated upstream of the twist stop guide 12 in the yarn running direction. The yarn Y thus drawn and twisted is heated by the first heating device 13 and then cooled by the cooling device 14 and thermally set. 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 heat-set as described above, each filament maintains its wavy false-twisted state. After that, the yarn Y that has been intertwined by the interlacing device 17 and thermally 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 yarn breakage sensor 26 on the yarn path. The cutter 23 is arranged upstream of the first feed roller 11 in the yarn running direction and cuts the yarn Y. As shown in FIG. The tension sensor 24 is arranged downstream of the pin-type twisting device 15 in the yarn traveling direction, and measures the tension of the twisted yarn Y. As shown in FIG. The suction 25 is arranged below the third feed roller 18 of the main frame 5 and is used to temporarily suck and hold the yarn Y during the yarn threading operation. The yarn breakage sensor 26 is arranged downstream of the fourth feed roller 20 in the yarn running direction, and detects the yarn breakage by detecting the presence or absence of the yarn Y. As shown in FIG. Note that the arrangement of each of these devices is not limited to the positions described here.

A notification unit 27 is provided on the upper part of the main machine base 5 . The notification unit 27 of the present embodiment is composed of a lamp, and can notify the operator of predetermined information by switching the lamp to a lighting or blinking state (notification state) in a predetermined case. However, the specific configuration of the notification unit 27 is not limited to this, and for example, it may notify the operator of predetermined information by means of voice information through a speaker or character information displayed on a screen.

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

Output signals from the tension sensor 24 and the yarn breakage sensor 26 are sent to the control section 30 . The control unit 30 controls the operations of the cutter 23 , the notification unit 27 , and the motor 54 of the pin-type twisting device 15 described later, according to output signals from the tension sensor 24 and the yarn breakage sensor 26 . Incidentally, the operation of the motor 54 is not only controlled by the control unit 30, but also configured so that the operation of the motor 54 can be switched by the operator operating the operation unit 32. FIG. A setting unit 31 is connected to the control unit 30 for the operator to input various setting values to the control unit 30 . The setting unit 31 can be configured by, for example, a touch panel, but other configurations such as a keyboard may be adopted.

(pin type twisting device)
FIG. 3 is a schematic diagram showing the configuration of the pin type twisting device 15, and FIG. 4 is a view of the pin type twisting device 15 viewed from the direction IV in FIG. The pin-type twisting device 15 twists the yarn Y running inside the cylindrical pin 41 by rotating the pin 41 about its axis. In FIG. 3, it is assumed that the yarn Y runs from top to bottom. Moreover, in FIG. 4, illustration of the guide member 52 is omitted.

The pin-type twisting device 15 has two rotary shafts 43 and 44 rotatably supported by a support member 42 via bearings (not shown). Two rollers 45 and 46 are attached to the rotary shaft 43 and are spaced apart in the axial direction. Two rollers 47 and 48 are attached to the rotary shaft 44 and are spaced apart in the axial direction. The rollers 45 and 47 are arranged at the same position in the axial direction, and are slightly spaced apart 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 rotary shaft 43 is rotationally driven around its axis by power transmitted from the motor 54 .

The pin 41 is a cylindrical member extending in the axial direction, and the yarn Y runs inside the pin 41 . A magnetic portion 41a facing magnets 49 and 50, which will be described later, is formed at an intermediate portion of the pin 41 in the axial direction. A diametrically extending winding portion 41 b is fixed inside one end portion of the pin 41 in the axial direction (the downstream end portion in the yarn running direction). The yarn Y is wound around the winding portion 41b once, and the yarn Y is twisted by rotating the pin 41 around its axis.

A magnet 49 is arranged between the rollers 45 and 46 in the axial direction. Similarly, a magnet 50 is arranged axially between the rollers 47 and 48 . Magnets 49 and 50 are fixed to support member 42 via 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 portion 41a of the pin 41 faces the magnets 49 and 50, the pin 41 moves toward the magnet 49 as shown in FIG. , 50 . Specifically, the pin 41 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, but is only held by the magnetic force of the magnets 49 and 50 and the frictional force with the peripheral surfaces of the rollers 45-48.

A ring-shaped guide member 52 is arranged on the upstream side of the pin 41 in the yarn running direction. The guide member 52 is fixed to the support member 42 via a bracket (not shown). A pipe-shaped guide member 53 is arranged on the downstream side of the pin 41 in the yarn running 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 in contact with the peripheral surface of the roller 45 is driven to rotate in the direction opposite to the roller 45 . Furthermore, 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 . The yarn Y is twisted by rotating the pin 41 about its axis. At this time, as indicated by arrows in FIG. (46) and rollers 47 (48) are preferably oriented in a pushing direction. By doing so, it is possible to prevent the pin 41 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 S-twist and Z-twist whose twisting directions are opposite to each other. In order to switch the direction of twisting, the power transmission destination of the motor 54 should be switched from the rotary shaft 43 to the rotary shaft 44 . For example, if the power from the motor 54 is transmitted by a belt, the belt that is hung around the rotating shaft 43 can 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 can be changed by using the motor 54 as a motor capable of forward and reverse rotation and switching the rotation directions of the rotary shafts 43 and 44. , the twist direction of the yarn Y may be switched.

(Setting the number of revolutions)
As will be described later in detail, when threading the false twisting machine 1, the threading is first performed on the pin-type twisting device 15, and the pins 41 are rotated to impart a twist to the thread Y. In this state, threading to other parts such as the feed roller is performed. In this case, if the number of revolutions of the pin 41 (motor 54) is suddenly increased to a high speed during production after the yarn is threaded onto the pin type twisting device 15, the yarn breakage is likely to occur. Therefore, before increasing the rotational speed of the pin 41 (motor 54) to the high rotational speed, the rotational speed is once maintained at a low rotational speed lower than the high rotational speed.

Each set value for the pin 41 (set value for the low speed rotation speed, high speed rotation speed, and acceleration of the pin 41) can be freely set by the operator via the setting unit 31 (see FIG. 2). In this embodiment, as an example, the pin 41 is set to have a low speed rotation speed of 160,000 rpm, a high speed rotation speed of 800,000 rpm, and an acceleration of 10,000 to 15,000 rpm/s. The set value can be changed as appropriate via the setting unit 31 . Each setting value set by the setting unit 31 is input to the control unit 30 and also to the controller of the motor 54 . The control unit 30 refers to each set value input via the setting unit 31 and controls the motor 54 .

An operation section 32 (see FIGS. 1 and 2) is provided in the vicinity of the pin type twisting device 15 in the main machine base 5 . A plurality of operation parts 32 are arranged side by side in the longitudinal direction of the machine base corresponding to the plurality of pin-type twisting devices 15 arranged in the longitudinal direction of the machine base. The operation unit 32 of this embodiment is configured by a single button. However, the specific configuration of the operation unit 32 is not limited to buttons, and may be configured by levers, dials, or the like. When the operation unit 32 is operated once (when the button is pressed once) when the pin 41 (motor 54) is in a stopped state, the pin 41 (motor 54) accelerates to a low rotational speed. If the operation part 32 is operated once more (if the button is pressed once more), the pin 41 (motor 54) accelerates to a high rotational speed. Furthermore, if the operation part 32 is operated once more (if the button is pressed once more), the pin 41 (motor 54) returns to the stopped state.

(Threading work)
A yarn threading operation to the false twisting machine 1 will be described. FIG. 5 is a flow chart showing the flow of the yarn threading work, FIG. 6 is a graph showing changes in the rotation speed of the pin 41 of the pin type twisting device 15, and FIGS. 7 and 8 show the yarn threading work. It is a schematic diagram showing a procedure. FIG. 6 shows an example of the timing of executing each step shown in FIG. 5, and also shows part of the transition of the tension of the yarn Y with a dashed line.

The operator first hooks the yarn Y pulled out from the yarn supply package Q to the pin-type twisting device 15 and causes the suction 25 to suck it (step S1, see FIG. 7a). At this time, the yarn Y passes under the cutter 23 and the first feed roller 11 , passes through the pin-type twisting device 15 , and reaches the suction 25 via the tension sensor 24 . In the yarn threading operation to the pin-type twisting device 15, the operator passes the yarn Y through the guide member 52, the pin 41, and the guide member 53 (see FIG. 3) in order, and then the pin 41 is pulled by the magnets 49 and 50 and the rollers. Position pin 41 so that it is held by 45-48.

Next, the operator operates the operation unit 32 to accelerate the pin 41 from a stopped state to a low rotational speed (step S2). While the pin 41 is accelerating to the low rotational speed or rotating at the low rotational speed, the operator threads the second feed roller 16 (step S3, see b in FIG. 7). . The drive roller of the second feed roller 16 is rotationally driven in advance, and the yarn Y is fed downstream in the yarn traveling direction by threading the yarn Y so as to sandwich the yarn Y between the drive roller and the driven roller (to be described later). The same applies to threading to the first feed roller 11 to be described). That is, after step S3 is completed, the running yarn Y is twisted by the pin 41 rotating at a low speed.

Next, the operator hooks the yarn Y on the twist stop guide 12 positioned at the yarn hooking position, and raises a shifter (not shown) along the guide rail 22 to move the twist stop guide 12 to the operating position (step S4, see Figure 8a). At this time, the yarn Y is passed over the first feed roller 11 with the driving roller and the driven roller separated from each other, and is passed through the cutter 23 . In addition, the yarn Y moves onto the yarn path passing through the first heating device 13 and the cooling device 14 while the twist stop guide 12 is moving up to the operating position. Note that it is not essential to execute steps S2 to S4 in this order, and the order of S2 to S4 may be changed or a plurality of steps may be executed simultaneously.

When steps S2 to S4 are completed and the thread Y does not break and the thread Y runs stably, the operator operates the operation unit 32 to rotate the pin 41 from the low speed rotation speed to the high speed rotation speed. Accelerate (step S5). Subsequently, the operator performs threading on the first feed roller 11 (step S6, see b in FIG. 8). Specifically, the driving roller and the driven roller of the first feed roller 11 sandwich and grip the yarn Y so that the yarn Y is fed.

Here, when the yarn is threaded onto the first feed roller 11, the tension of the yarn Y suddenly increases (see the change in tension in FIG. 6). There is a risk. Therefore, the operator performs the yarn threading to the first feed roller 11 at the timing when the number of rotations of the pin 41 has sufficiently increased, the number of twists of the yarn Y has increased, and the tension of the yarn Y has decreased. Specifically, the operator can determine from the sound of the motor, for example, whether the rotation speed of the pin 41 (motor 54) has increased sufficiently. The timing of threading the first feed roller 11 may be when the pin 41 is accelerating toward the high speed rotation or after the pin 41 reaches the high speed rotation.

After finishing the steps up to step S6, if there is no particular problem with the running of the yarn Y, etc., the third feed roller 18, the second heating device 19, the fourth feed roller 20, and the winding device 21 are finally hooked. (step S7). As a result, the yarn Y false-twisted in the processing section 3 is wound by the winding section 4, and the package P is produced.

(effect)
In the false twisting machine 1 of the present embodiment, the number of rotations of the pins 41 of the pin-type twisting device 15 includes at least a high number of rotations, which is the number of rotations during yarn production, and a low number of rotations, which is lower than the high number of rotations. , and an operation unit 32 for switching the number of rotations of the pin 41 between high-speed rotation and low-speed rotation. According to this configuration, since the setting section 31 is provided for setting the set values for the high speed rotation speed and the low speed rotation speed, the rotation speed of the pin 41 (motor 54) can be freely changed via the setting section 31. can do. Therefore, it is possible to respond to changes in the type of yarn Y and production conditions. Further, since the number of rotations of the pin 41 (motor 54) can be switched between preset high-speed rotation and low-speed rotation by the operation unit 32, delicate adjustment of the rotation speed by the operator is unnecessary. Therefore, according to the false twisting machine 1 of the present embodiment, the versatility of the false twisting machine 1 can be improved, and the yarn threading can be easily performed regardless of the skill level of the operator.

In this embodiment, the acceleration of the pin 41 can be set via the setting section 31 . If the acceleration of the pins 41 of the pin-type twisting device 15 is too high, yarn breakage is likely to occur during acceleration, but the critical acceleration varies depending on the type of yarn Y and production conditions. Therefore, by allowing the acceleration of the pin 41 (motor 54) to be freely set, the occurrence of yarn breakage during acceleration of the pin 41 can be suppressed regardless of the type of yarn Y and production conditions.

In this embodiment, the acceleration of the pin 41 is set to 80,000 rpm/s or less (specifically, about 10,000 to 15,000 rpm/s). Although it depends on the type of yarn Y, when the acceleration of the pin 41 is approximately 80,000 rpm/s or less, the occurrence of yarn breakage during acceleration of the pin 41 can be suppressed favorably.

In this embodiment, the low-speed rotation speed of the motor 54 is set to a rotation speed equal to or less than half the high-speed rotation speed. By suppressing the number of low-speed rotations to 1/2 or less of the number of high-speed rotations, the number of twists of the yarn Y during low-speed rotation can be reduced to suppress yarn swaying.

In this embodiment, each time the operation unit 32 is operated, the number of rotations of the pin 41 is sequentially switched from the lowest number of rotations to the highest number of rotations among the number of rotations corresponding to the setting value set in the setting unit 31. will change. According to such a configuration, by operating the operating portion 32 in accordance with the progress of the threading operation, the pin 41 can be switched in order, for example, from the stopped state to the low speed rotation speed to the high speed rotation speed. Therefore, it is possible to eliminate mistakes such as accidentally accelerating the pin 41 from a stopped state to a high rotational speed.

In this embodiment, the rotational direction of the rotating shaft 43 that is rotationally driven by the motor 54 is between the pin 41 and the roller 45 (46) and the roller 47 (48) attached to the two rotating shafts 43 and 44, respectively. is the direction in which the With such a configuration, it is possible to prevent the pin 41 from being separated from the rollers 45 and 46 attached to the rotating shaft 43 that is rotationally driven by the motor 54, and the power of the motor 54 is transmitted through the rollers 45 and 46. is transmitted to the pin 41 reliably. Therefore, the number of rotations of the pin 41 can be accurately controlled.

In this embodiment, a tension sensor 24 for measuring the tension of the yarn Y is arranged downstream of the pin-type twisting device 15 in the yarn traveling direction, and predetermined control is executed based on the tension detected by the tension sensor 24. A control unit 30 is provided. During the yarn threading operation to the false twisting machine 1, the tension of the yarn Y suddenly changes, and yarn breakage may occur. Therefore, by appropriately executing predetermined control based on the tension of the yarn Y, it is possible to perform the yarn threading operation satisfactorily while suppressing yarn breakage. A specific example will be described in the modification below.

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

(1) In the above-described embodiment, the rotation speed itself is set as the set value for the low speed rotation speed and the high speed rotation speed of the pin 41 of the pin type twisting device 15 . However, it is also possible to indirectly set the low speed and high speed of rotation by setting values other than the speed of rotation. For example, a predetermined first tension may be set for the tension of the yarn Y as the set value for the low speed rotation speed. This modification will be described in detail with reference to FIG. FIG. 9 is a graph showing changes in the number of rotations of the pins 41 of the pin-type twisting device 15, showing the changes from the stop state to the low rotation number, and showing the changes in tension of the yarn Y partly with broken lines. showing.

When the operator operates the operating portion 32 while the pin 41 is in a stopped state, the tension of the yarn Y decreases as the number of rotations of the pin 41 increases, as shown in FIG. When the first tension is set as the set value for the low speed rotation speed as described above, when the pin 41 is accelerating from a stopped state, the tension of the yarn Y measured by the tension sensor 24 becomes the first tension. , the controller 30 stops the acceleration of the pin 41 (motor 54) and keeps the rotation speed of the pin 41 constant. The rotation speed of the pin 41 at this time is the low rotation speed of the present invention. In this case, if the first tension is set to a sufficiently low value, even if the yarn is threaded on the second feed roller 16 during low-speed rotation and the tension suddenly increases (see FIG. 9), the yarn will be Cuts can be prevented.

When the first tension is set as the setting value for the low speed rotation speed, when the tension of the yarn Y measured by the tension sensor 24 decreases to the first tension while the pin 41 is accelerating from a stopped state, the control It is preferable that the unit 30 switches the notification unit 27 to the notification state. By informing the operator that the tension of the yarn Y has decreased to the first tension in this way, the operator can quickly proceed with the yarn threading operation.

(2) In the above embodiment, the timing for threading the first feed roller 11 in step S6 is determined by the operator based on the motor sound. Therefore, a predetermined second tension is set for the tension of the yarn Y, and when the tension measured by the tension sensor 24 decreases to the second tension while the pin 41 is accelerating from a low rotational speed, the control unit 30 may switch the notification unit 27 to the notification state. In this way, the operator can thread the first feed roller 11 at an appropriate timing as long as the second tension is appropriately set.

As described above, when the second tension is set as the tension of the yarn Y suitable for threading the first feed roller 11, when the pin 41 is accelerating from the low rotation speed, the tension sensor The controller 30 may stop accelerating the pin 41 (motor 54) when the tension measured at 24 drops to the second tension. In this way, by maintaining the number of rotations of the pin 41 at the number of rotations when the tension of the yarn Y is reduced to the second tension, the first feed roller is rotated while the number of twists of the yarn Y is constant and stable. 11 can be threaded.

(3) In the above embodiment, the notification section 27 is provided separately from the operation section 32 . However, the operation unit 32 may be configured to have the function of the notification unit 27 as well. For example, when the operation unit 32 is composed of buttons as in the above embodiment, the buttons may be configured to be lit or blinkable to function as a notification unit.

(4) The control unit 30 may switch the notification unit 27 to the notification state when the pin 41 reaches a high rotation speed. Specifically, when the rotation speed of the motor 54 reaches a rotation speed corresponding to the high-speed rotation speed of the pin 41, the notification unit 27 may be switched to the notification state. By doing so, the success rate of subsequent yarn threading to the third feed roller 18, the fourth feed roller 20, and the winding device 21 is improved.

(5) In the pin-type twisting device 15 of the above embodiment, only one of the two rotating shafts 43 and 44 is rotated by the motor 54 . However, both of the two rotating shafts 43 and 44 may be configured to be rotationally driven. In this case, S-twisting and Z-twisting can be easily switched without changing belts or the like.

(6) Various modifications may be made to each device constituting the false twisting machine 1 of the above embodiment. For example, in the above embodiment, the twist stop guide 12 is made movable by the shifter, but it is also possible to make the twist stop guide 12 fixed (see Japanese Patent Laid-Open No. 2011-47074), and the shifter can be manually moved. It is good also as a structure to move. It is also possible to omit the cooling device 14 and the second heating device 19 .

1: False twisting machine 15: Pin type twisting device 24: Tension sensor 27: Notification unit 30: Control unit 31: Setting unit 32: Operation unit 41: Pins 43, 44: Rotating shafts 45 to 48: Rollers 54: Motor Y: Yarn

Claims (10)

Having cylindrical pins held in contact with the circumferential surfaces of rollers attached to each of the two rotating shafts, and rotating at least one of the two rotating shafts by a motor. A false twisting machine comprising a pin-type twisting device that rotates the pins to impart a twist to the yarn running inside the pins,
a setting unit for setting at least set values for the number of rotations of the pin, a high number of rotations that is the number of rotations during yarn production, and a low number of rotations that is lower than the high number of rotations;
an operation unit for switching the rotation speed of the pin between the high rotation speed and the low rotation speed;
a control unit that refers to the set value input via the setting unit and controls the motor;
with
Each time the operation unit is operated, the number of rotations of the pin is switched in order from a low number of rotations to a high number of rotations among the number of rotations corresponding to the setting value set in the setting unit. Characteristic false twisting machine. 2. The false twisting machine according to claim 1, wherein the acceleration of said pin can be set via said setting unit. 3. A false twisting machine according to claim 2, wherein the acceleration of said pin is set to 80,000 rpm/s or less. 4. The false twisting machine according to any one of claims 1 to 3, wherein the low speed rotation speed is set to a rotation speed equal to or less than 1/2 of the high speed rotation speed. 4. The direction of rotation of the rotating shaft rotationally driven by the motor is the direction in which the pin is pushed between the rollers respectively attached to the two rotating shafts. The false twisting machine according to any one of 1. A tension sensor for measuring the tension of the yarn is provided downstream of the pin-type twisting device in the yarn running direction,
The false twisting machine according to any one of claims 1 to 5 , wherein the control section executes predetermined control based on the tension detected by the tension sensor. A predetermined first tension is set for the yarn tension as the set value for the low speed rotation speed,
7. The control unit stops acceleration of the motor when the tension measured by the tension sensor decreases to the first tension while the pin is accelerating from a stopped state. A false twisting machine as described. further comprising a notification unit that can be switched to a notification state for notifying the operator of predetermined information;
3. The control unit switches the notification unit to the notification state when the tension measured by the tension sensor decreases to the first tension while the pin is accelerating from a stopped state. 8. The false twisting machine according to 7 . further comprising a notification unit that can be switched to a notification state for notifying the operator of predetermined information;
A predetermined second tension is set with respect to the yarn tension,
When the tension measured by the tension sensor decreases to the second tension while the pin is accelerating from the low rotation speed, the control unit switches the notification unit to the notification state. The false twisting machine according to any one of claims 6 to 8 . 3. The controller stops accelerating the motor when the tension measured by the tension sensor decreases to the second tension while the pin is accelerating from the low speed rotation speed. 9. The false twisting machine according to 9.

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