False twisting machine and yarn guiding method

Abstract

To enable a yarn to be easily guided to a disk-type twisting device while suppressing upsizing of a false twisting machine.SOLUTION: A false twisting machine 1 has a plurality of weights including twisting devices 15 and includes a plurality of twisting device drive motors 56 provided individually on the twisting devices 15 of the plurality of weights, control means 60, and a plurality of switching buttons 95 provided individually on the twisting devices 15 of the plurality of weights. The twisting device 15 has a plurality of disk units including a plurality of disks and rotation shafts 53 to rotate the plurality of disks. The twisting device drive motor 56 drives the rotation shaft 53 of each disk unit of corresponding twisting device 15 to rotate. Switching buttons 95 generate a switching signal to switch a rotation speed of the rotation shafts 53 between at least a first rotation speed representing a rotation speed when the yarn is manufactured and a second rotation speed representing a rotation speed lower than the first rotation speed, and send the switching signal to the control means.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a false twisting machine having a disk-type twisting device in which a plurality of disks are arranged, and a method of threading a yarn on the false twisting machine. [Background technology]

[0002] A false twisting machine that performs a false twisting process on a yarn and winds the yarn on a winding section is known in the art. Such a false twisting machine has a configuration in which a plurality of twisting devices that impart twist to a traveling yarn are arranged in a predetermined direction.

[0003] A commonly used twisting device is, for example, a fixed disk-type twisting device (the three-axis friction false twisting device of Patent Document 1) described in Patent Document 1. A disk-type twisting device is a twisting device that has multiple disks (the friction disks of Patent Document 1) arranged in a spiral shape and is configured to impart twist to a running yarn while contacting the peripheral surface of each rotating disk.

[0004] The threading of the yarn on the disk-type twisting device is usually performed while the disks are rotating. To be more specific, for example, an operator operates a holding member that holds the yarn, and passes the yarn between multiple rotating disks, thereby threading the yarn on the disk-type twisting device. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2001-303373 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, when threading a yarn on a disk-type twisting device, the yarn comes into contact with the circumferential surface of the rotating disk, causing the yarn tension to fluctuate, and this tension fluctuation pulls the holding member operated by the operator. This makes it difficult for the operator to operate the holding member, and problems such as the holding member coming into contact with the disk and damaging the disk are likely to occur. Such problems are particularly noticeable when the operator is not accustomed to threading operations.

[0007] In order to facilitate the threading operation, it is conceivable to adopt an opening and closing type twisting device that opens the spaces between the disks during threading to make it easier to pass the yarn between the disks. However, in the case of such an opening and closing type twisting device, it is necessary to secure space for moving the disks, which leads to an increase in the size of the false twisting machine and reduces the production efficiency per unit area.

[0008] An object of the present invention is to make it possible to easily thread yarn on a disk-type twisting device while suppressing an increase in the size of a false twisting machine. [Means for solving the problem]

[0009] The false twisting machine of the present invention includes a plurality of spindles, each including a twisting device, a first yarn feed roller arranged upstream of the twisting device in a yarn running direction in which a yarn runs, and a second yarn feed roller arranged downstream of the twisting device in the yarn running direction, and the false twisting machine includes a plurality of twisting device drive mechanisms provided individually for the twisting devices of the plurality of spindles, a first yarn feed roller drive mechanism provided commonly for the first yarn feed rollers of the plurality of spindles and drives to rotate the plurality of first yarn feed rollers, a second yarn feed roller drive mechanism provided commonly for the second yarn feed rollers of the plurality of spindles and drives to rotate the plurality of second yarn feed rollers, a control means, and a plurality of switching means provided individually for the twisting devices of the plurality of spindles, the twisting device drive mechanism drives and rotates the rotation shaft of each of the disk units corresponding to the twisting device; the control means controls the twisting device drive mechanism, the first yarn feed roller drive mechanism, and the second yarn feed roller drive mechanism; and each of the switching means generates a switching signal by manual operation to switch the rotation speed of each of the rotating shafts driven by the corresponding twisting device drive mechanism between at least a first rotation speed, which is the rotation speed during yarn production, and a second rotation speed which is slower than the first rotation speed, and sends the switching signal to the control means.

[0010] According to the present invention, by manually operating the switching means by the operator, the rotation speed of the rotating shaft of each disk unit of the twisting device to be threaded among the twisting devices of the multiple spindles is switched from the first rotation speed, which is the rotation speed during yarn production, to the second rotation speed, which is the rotation speed slower than the first rotation speed, and then threading is performed, which has the following advantages. That is, since the rotation speed of the rotating shaft is slower than when threading is performed when the rotating shaft is at the first rotation speed during yarn production, it is possible to suppress strong fluctuations in the tension of the yarn caused by contact between the disk rotating with the rotation of the rotating shaft. Similarly, even when threading is performed while the rotation speed of the rotating shaft is decelerating from the first rotation speed to the second rotation speed, or while the rotation speed of the rotating shaft is accelerating to the second rotation speed, it is possible to suppress strong fluctuations in the tension of the yarn compared to when threading is performed when the rotating shaft is at the first rotation speed. As a result, when the operator operates the holding member holding the yarn during threading on the twisting device, pulling of the holding member due to the yarn tension is suppressed. This makes it easy to thread the yarn between the multiple disk units while avoiding contact between the holding member and the disk. Furthermore, according to the present invention, the rotation speed of the rotating shaft of the twisting device other than the target of threading can be maintained at the first rotation speed, so that the decrease in the yarn production efficiency of the false twisting machine as a whole can be suppressed. In addition, according to the present invention, since the yarn can be threaded between the multiple disks without opening the space between the multiple disks, there is no need to secure space for moving the disks as in the case of an opening / closing type twisting device. Therefore, compared to the case where an opening / closing type twisting device is used, the false twisting machine can be made smaller, and the production efficiency per site is increased. In general, compared to the opening / closing type twisting device, it is difficult to thread the yarn on the twisting device without opening the space between the disks. However, according to the present invention, threading can be easily performed by performing threading while the rotating shaft is rotated at a low second rotation speed or while decelerating or accelerating toward the second rotation speed, so that the advantage of using a twisting device that does not open the space between the disks can be fully utilized.

[0011] Furthermore, according to the present invention, the twisting device drive mechanisms, the first yarn feed roller drive mechanism, and the second yarn feed roller drive mechanism are controlled independently of each other. Therefore, even if the rotation speed of each rotation shaft of the twisting device to be threaded is switched to the second rotation speed, the rotation speeds of the first yarn feed rollers and the second yarn feed rollers do not decrease. This makes it possible to prevent a decrease in the production efficiency of the entire false twisting machine during threading.

[0012] In the false twisting machine of the present invention, it is preferable that the false twisting machine further comprises a plurality of notification units individually provided for the twisting devices of the plurality of spindles, and each notification unit notifies when the rotational speed of each rotating shaft driven by the corresponding twisting device drive mechanism has reached the second rotational speed.

[0013] According to the present invention, the operator can know whether the rotation speed of the rotating shaft of each twisting device has reached the second rotation speed, which prevents the operator from erroneously threading yarn when the rotating shaft of the twisting device to be threaded is at the first rotation speed.

[0014] In the false twisting machine of the present invention, it is preferable that the notification section notifies that the rotation speed of each of the rotating shafts has reached the second rotation speed by a lighting or blinking pattern of a lamp.

[0015] According to the present invention, an operator can quickly visually determine the rotation speed of the rotating shaft of each twisting device.

[0016] In the false twisting machine of the present invention, the switching signal preferably includes a signal for switching each of the rotating shafts driven by the corresponding twisting device driving mechanisms to a stopped state in which rotation is stopped.

[0017] According to the present invention, when the yarn becomes entangled on the disk, the rotation of the rotating shaft can be stopped individually for each twisting device. Therefore, for the twisting devices where the yarn is not entangled on the disk, the rotation speed of the rotating shaft can be maintained at the first rotation speed, thereby suppressing a decrease in the yarn production efficiency of the false twisting machine as a whole.

[0018] The yarn threading method of the present invention is a yarn threading method for threading a yarn on a false twisting process machine having a plurality of twisting devices, each of which has a plurality of disk units including a plurality of disks and a rotating shaft for rotating the plurality of disks, and a plurality of spindles including twisting devices capable of imparting twist to a yarn running between the plurality of disk units by rotating the rotating shaft of each of the disk units, and configured such that the rotational speed of the rotating shaft of each of the disk units of the twisting devices of the plurality of spindles can be switched at least between a first rotational speed, which is the rotational speed during yarn production, and a second rotational speed, which is slower than the first rotational speed, the method including: a switching step of switching the rotational speed of each rotating shaft of a twisting device to be threaded among the plurality of spindles, to the second rotational speed; and a twisting device threading step of threading the yarn on the twisting device to be threaded by passing the yarn between the plurality of disk units when each rotating shaft is rotating at the second rotational speed, when the rotation speed is decreasing from the first rotational speed to the second rotational speed, or when the rotation speed is increasing toward the second rotational speed.

[0019] According to the present invention, the rotation speed of the rotating shaft of each disk unit of the twisting device to be threaded among the multiple spindle twisting devices is switched from the first rotation speed, which is the rotation speed during yarn production, to the second rotation speed, which is the rotation speed slower than the first rotation speed, before threading, which has the following advantages. That is, since the rotation speed of the rotating shaft is slower than when threading is performed when the rotating shaft is at the first rotation speed during yarn production, it is possible to suppress strong fluctuations in the tension of the yarn caused by contact between the disk rotating with the rotation of the rotating shaft. Similarly, even when threading is performed while the rotation speed of the rotating shaft is decelerating from the first rotation speed to the second rotation speed, or while the rotation speed of the rotating shaft is accelerating to the second rotation speed, it is possible to suppress strong fluctuations in the tension of the yarn compared to when threading is performed when the rotating shaft is at the first rotation speed. Then, when an operator operates the holding member that holds the yarn during threading on the twisting device, pulling of the holding member due to the yarn tension is suppressed. This makes it easy to thread the yarn by passing it between the multiple disk units while avoiding contact between the holding member and the disk. Furthermore, according to the present invention, the rotation speed of the rotating shaft of the twisting device other than the target of threading can be maintained at the first rotation speed, so that the decrease in the yarn production efficiency of the false twisting machine as a whole can be suppressed. In addition, according to the present invention, since the yarn can be passed between the multiple disks without opening the spaces between the multiple disks, there is no need to secure space for moving the disks as in the case of the open-close type twisting device. Therefore, compared to the case where the open-close type twisting device is used, the false twisting machine can be made smaller, and the production efficiency per site is increased. In general, compared to the open-close type twisting device, it is difficult to thread the yarn on the twisting device without opening the spaces between the disks. However, according to the present invention, threading can be easily performed by performing threading while the rotating shaft is rotated at a low second rotation speed or while decelerating or accelerating toward the second rotation speed, so that the advantage of using a twisting device that does not open the spaces between the disks can be fully utilized.

[0020] In the yarn threading method of the present invention, it is preferable that the twisting device yarn threading step is performed after the rotation speeds of the respective rotary shafts reach the second rotation speed.

[0021] According to the present invention, the twisting device threading step is performed with the rotation speed of each rotating shaft being constant at the second rotation speed, so that the yarn tension generated by the contact between the yarn and the peripheral surface of the disk is stable, and it is possible to avoid a situation in which the yarn tension fluctuates greatly and makes it difficult to operate the holding member, making threading easier.

[0022] In the yarn threading method of the present invention, each spindle arranged in the false twisting process includes a second yarn feed roller arranged downstream of the twisting device in the yarn running direction in which the yarn runs, and further includes a roller yarn threading step of winding the yarn around the rotating second yarn feed roller arranged downstream of the twisting device to be threaded, and it is preferable that the twisting device yarn threading step is performed after the roller yarn threading step.

[0023] According to the present invention, by first hooking the yarn around the rotating second yarn feed roller, the yarn is pulled by the second yarn feed roller and the yarn is made taut in the yarn running direction. A taut yarn is less likely to sway than a slack yarn. This makes it even easier to hook the yarn around the twisting device.

[0024] In the yarn threading method of the present invention, it is preferable that the roller yarn threading step is started after the switching step is performed and before the rotation speeds of the respective rotation shafts reach the second rotation speed.

[0025] According to the present invention, the roller threading process is started before the rotation speed of each rotary shaft reaches the second rotation speed, thereby making it possible to shorten the operation time. [Brief description of the drawings]

[0026] [Figure 1] 1 is a schematic side view of a false twisting machine according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing a false twisting machine deployed along a yarn path. [Diagram 3] FIG. 3 is a view taken along the arrow III in FIG. [Figure 4]FIG. [Diagram 5] FIG. 2 is a view of the twisting device as seen from a direction perpendicular to both the machine longitudinal direction and the axial direction. [Figure 6] FIG. 2 is a view of the twisting device as seen from the axial direction. [Figure 7] FIG. 2 is a block diagram showing the electrical configuration of the false twisting machine. [Figure 8] 4 is a flowchart showing a procedure for threading a yarn on a false twisting machine. [Figure 9] 1A is a graph showing the fluctuation in the rotational speed of the rotating shaft and the change in yarn tension as the yarn threading progresses, where (a) is a graph showing yarn threading when starting the operation of the false twisting machine, and (b) is a graph showing yarn threading in the middle of winding the yarn by the winding section. [Figure 10] FIG. 4 is a diagram showing an example of a holding member used for threading. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the direction perpendicular to the paper surface is the machine base longitudinal direction, and the left-right direction of the paper surface is the machine base width direction. The direction perpendicular to both the machine base longitudinal direction and the machine base width direction is the up-down direction (vertical direction) in which gravity acts. Hereinafter, these directions will be used appropriately in the description.

[0028] (Overall configuration of false twist processing machine) First, the overall configuration of the false twisting machine will be described with reference to Fig. 1 to Fig. 3. Fig. 1 is a side view of the false twisting machine 1 according to the present embodiment. Fig. 2 is a schematic view of the false twisting machine 1 developed along the path (yarn path) of the yarn Y. Fig. 3 is a view seen from the arrow III in Fig. 1.

[0029] The false twisting machine 1 is configured to be capable of false twisting a yarn Y made of a synthetic fiber such as nylon (a polyamide fiber). The false twisting machine 1 includes a yarn supplying section 2 for supplying the yarn Y, a processing section 3 for false twisting the yarn Y supplied from the yarn supplying section 2, and a winding section 4 for winding the yarn Y processed by the processing section 3 onto a winding bobbin Bw. The components of the yarn supplying section 2, the processing section 3, and the winding section 4 (each of which will be described later) are arranged in a plurality of rows in the machine frame longitudinal direction perpendicular to the yarn running plane (the plane of the paper in FIG. 1) on which the yarn path from the yarn supplying section 2 through the processing section 3 to the winding section 4 is arranged (see FIG. 2).

[0030] The yarn supplying section 2 has a creel stand 7 that holds a plurality of yarn supply packages Ps, and supplies a plurality of yarns Y to the processing section 3. The processing section 3 is configured to include, in order from the upstream side in the yarn running direction in which the yarn Y runs, a first feed roller 11 (a first yarn feed roller of the present invention), a twist stop guide 12, a first heating device 13, a cooling device 14, a twisting device 15, a second feed roller 16 (a second yarn feed roller of the present invention), an intertwining device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20. The winding section 4 winds the yarn Y that has been false twisted in the processing section 3 onto a winding bobbin Bw with a winding device 21 to form a winding package Pw.

[0031] The false twisting machine 1 has individual units called spans. In one span, various devices are arranged so that multiple yarns Y running side by side in the longitudinal direction of the machine can be false twisted simultaneously.

[0032] In the false twisting machine 1, a plurality of spindles 25 (for example, 12 spindles) are arranged in parallel. Each spindle 25 includes one yarn supply package Ps, one first feed roller 11, one twist stop guide 12, one first heating device 13, one cooling device 14, one twisting device 15, one second feed roller 16, one intertwining device 17, one third feed roller 18, one second heating device 19, one fourth feed roller 20, and one winding device 21 (see FIG. 2). In this embodiment, one first heating device 13 is arranged across two spindles 25, and one second heating device 19 is arranged across multiple spindles 25 (for example, four spindles 25). However, this is not limited to this. In one spindle 25, the yarn Y sent from the yarn supply package Ps is wound by the winding device 21 to become a winding package Pw.

[0033] (Configuration of processing part) Next, the configuration of the processing unit 3 will be described with reference to FIGS.

[0034] The first feed roller 11 is configured to unwind the yarn Y from the yarn supplying package Ps attached to the yarn supplying section 2 and send it to the first heating device 13. The rotation of the multiple first feed rollers 11 is driven by a single first roller drive motor 91 (a first yarn feed roller drive mechanism of the present invention, see FIG. 7 ) provided in common to the first feed rollers 11 of all spindles 25 arranged in the false twisting machine 1.

[0035] The twist stop guide 12 is provided to prevent the twist imparted to the yarn Y by a twisting device 15 (described later) from propagating upstream of the twist stop guide 12 in the yarn running direction.

[0036] The first heating device 13 is for heating the yarn Y fed from the first feed roller 11 to a predetermined processing temperature (see FIG. 1).

[0037] The cooling device 14 is for cooling the yarn Y heated by the first heating device 13.

[0038] The twisting device 15 is a type of twisting device of a so-called disk friction type, and is configured to be able to impart twist to the yarn Y. The twisting device 15 will be described in more detail later.

[0039] The second feed rollers 16 are rollers that send the yarn Y to which twist has been imparted by the twisting device 15 toward the intertwining device 17. The rotation of the multiple second feed rollers 16 is driven by a single second roller drive motor 92 (a second yarn feed roller drive mechanism of the present invention, see FIG. 7 ) provided in common to the second feed rollers 16 of all of the spindles 25 arranged in the false twisting machine 1.

[0040] The intertwining device 17 is a device that intertwines the yarn Y by injecting air thereto.

[0041] The third feed roller 18 is a roller that sends the yarn Y that has been entangled by the entangling device 17 toward the second heating device 19. The third feed roller 18 is driven by a motor (not shown).

[0042] The second heating device 19 is a device for heating the yarn Y fed from the third feed roller 18.

[0043] The fourth feed roller 20 is for feeding the yarn Y heated by the second heating device 19 to the winding device 21. The fourth feed roller 20 is driven by a motor (not shown).

[0044] In the processing section 3 configured as above, the yarn Y stretched between the first feed roller 11 and the second feed roller 16 is twisted by the twisting device 15. The twist formed by the twisting device 15 propagates to the twist stop guide 12, but does not propagate upstream of the twist stop guide 12 in the yarn running direction. The yarn Y stretched and twisted is heated and heat-set by the first heating device 13, and then cooled by the cooling device 14. The yarn Y is untwisted downstream from the twisting device 15, but the filaments are maintained in a wavy false twist state by the heat setting. The yarn Y false-twisted by the twisting device 15 is relaxed between the second feed roller 16 and the third feed roller 18, and is entangled by the entanglement device 17, and is guided downstream in the yarn running direction. Furthermore, the yarn Y is heat-set by the second heating device 19 while being relaxed between the third feed roller 18 and the fourth feed roller 20. Finally, the yarn Y fed from the fourth feed roller 20 is wound by a winding device 21 to form a winding package Pw.

[0045] (Configuration of winding section) Next, the configuration of the winding unit 4 will be described with reference to Fig. 2. The winding unit 4 has multiple winding devices 21 that wind the yarn Y onto a winding bobbin Bw. In the winding unit 4 configured as above, the yarn Y fed from the fourth feed roller 20 is wound onto the winding bobbin Bw by each winding device 21 to form a winding package Pw.

[0046] (Structure of twisting device) Next, the configuration of the twisting device 15 will be described with reference to Fig. 4 to Fig. 6. Fig. 4 is a perspective view of the twisting device 15. Fig. 5 is a view of the twisting device 15 as viewed from a direction perpendicular to both the machine longitudinal direction and the axial direction of a rotating shaft 53 (hereinafter simply referred to as the axial direction) described later. Fig. 6 is a view of the twisting device 15 as viewed from the axial direction.

[0047] The twisting device 15 is configured to be capable of imparting twist to the yarn Y. A plurality of twisting devices 15 are arranged in the longitudinal direction of the machine base (see FIG. 2). As shown in FIGS. 4 to 6, each twisting device 15 has a plurality of disk units 51 (three in this embodiment), a support base 54, and a twisting device drive motor 56 (twisting device drive mechanism of the present invention). Each disk unit 51 has a plurality of disks 55 (three in this embodiment) and a rotating shaft 53 that rotates the plurality of disks 55.

[0048] The rotating shaft 53 of each disk unit 51 is a shaft member extending in an axial direction substantially perpendicular to the longitudinal direction of the machine base. The axial direction does not necessarily have to be substantially perpendicular to the longitudinal direction of the machine base. As shown in Fig. 6, the three rotating shafts 53 are arranged such that the axial centers form the vertices of an imaginary equilateral triangle T when viewed from the axial direction.

[0049] The multiple disks 55 of the disk unit 51 are members for imparting twist to the yarn Y by contacting the circumferential surface with the yarn Y. As shown in Figs. 4 to 6, the multiple disks 55 are attached to each rotating shaft 53. In this embodiment, three disks 55 are attached to each rotating shaft 53 (see Fig. 4, etc.), but the number of disks 55 attached to each rotating shaft 53 is not limited to this. In this embodiment, each rotating shaft 53 and the multiple disks 55 attached to the rotating shaft 53 are fixedly arranged so as not to move from the position shown in Fig. 4. The twisting device 15 can impart twist to the yarn Y traveling between the multiple disk units 51 by rotating the rotating shaft 53 of each disk unit 51.

[0050] The multiple disks 55 attached to each rotating shaft 53 are arranged to draw a spiral extending in the axial direction. In this embodiment, when viewed from the tip side in the axial direction, the disks 55 attached to each rotating shaft 53 are arranged to draw a spiral in a clockwise direction. Therefore, the multiple disks 55 can apply an S twist to the yarn Y. Note that, when viewed from the tip side in the axial direction, the disks 55 attached to each rotating shaft 53 may be arranged to draw a spiral in a counterclockwise direction. In this case, the multiple disks 55 can apply a Z twist to the yarn Y.

[0051] The portions of the disks 55 that come into contact with the yarn Y are made of, for example, polyurethane. However, the portions of the disks 55 that come into contact with the yarn Y may be made of, for example, ceramic. Furthermore, the portions of some disks 55 that come into contact with the yarn Y may be made of polyurethane, and the portions of other disks 55 that come into contact with the yarn Y may be made of ceramic.

[0052] The support base 54 is a base that rotatably supports the rotating shafts 53 via bearings (not shown). The support base 54 supports the three rotating shafts 53 in a cantilever manner. The upper side of the paper in Figs. 4 and 5 is the tip side in the axial direction, and the lower side of the paper is the base side in the axial direction. The yarn Y runs from the tip side to the base side in the axial direction of the rotating shafts 53. In other words, the tip side in the axial direction is the upstream side in the yarn running direction. The base side in the axial direction is the downstream side in the yarn running direction. The support base 54 supports the base side in the axial direction of each rotating shaft 53. Each rotating shaft 53 is attached to the support base 54 so as not to move from the position in Fig. 4.

[0053] The twisting device drive motor 56 is for rotating the rotating shafts 53 of the respective disk units 51 of the corresponding twisting devices 15. In other words, the twisting device drive motor 56 is a mechanism for driving the three rotating shafts 53 to rotate in the same direction. The power of the twisting device drive motor 56 is transmitted to each rotating shaft 53 via a belt (not shown). The twisting device drive motor 56 drives each rotating shaft 53 to rotate in a clockwise direction when viewed from the tip end side in the axial direction (see the arrows in FIG. 6).

[0054] As shown in Figs. 4 and 5, a plurality of switching buttons 95 (switching means of the present invention) are provided for each of the twisting devices 15 of the spindles 25. In other words, one switching button 95 is provided for each twisting device 15 (see Fig. 7). The switching button 95 generates a switching signal by manual operation to switch the rotation speed of each rotating shaft 53 driven by the corresponding twisting device driving motor 56 between a first rotation speed, which is a rotation speed during production of the yarn Y, a second rotation speed, which is a rotation speed slower than the first rotation speed, and a stopped state in which the rotation is stopped. The switching button 95 then sends the generated switching signal to the control means 60 (described later). The production of the yarn Y refers to the time when the winding device 21 of the winding section 4 winds the yarn Y around a winding bobbin Bw to form a winding package Pw. Specifically, an operator manually operates the switching button 95 to generate a switching signal for switching the rotation speed of the rotating shaft 53 driven to rotate by the twisting device driving motor 56. Although described in detail below, the control means 60 controls the twisting device drive motor 56 so that the rotation speed of each rotating shaft 53 becomes either the first rotation speed, the second rotation speed, or a stopped state by receiving a switching signal sent from the switching button 95. For example, when the operator presses the switching button 95 once, a switching signal for switching the rotation speed of each rotating shaft 53 to the first rotation speed is generated, when the operator presses the switching button 95 again, a switching signal for switching the rotation speed of each rotating shaft 53 to the second rotation speed is generated, and when the operator presses the button for a predetermined period of time or longer, a switching signal for switching each rotating shaft 53 to a stopped state is generated.

[0055] In this embodiment, the switching button 95 has a built-in monochromatic lamp. The switching button 95 can notify the operator that the rotation speed of each rotating shaft 53 of the corresponding twisting device 15 has reached the second rotation speed by the lighting pattern of the lamp. That is, the switching button 95 corresponds to the notification unit of the present invention in addition to the switching means of the present invention. The switching button 95 indicates any one of lighting, blinking, and extinguishing. For example, when the rotation speed of the rotating shaft 53 reaches the second rotation speed, the switching button 95 blinks. Also, when the rotation speed of the rotating shaft 53 reaches the first rotation speed, the switching button 95 lights up continuously. Also, when the rotating shaft 53 is in a stopped state, the switching button 95 is turned off. Furthermore, when the rotating shaft 53 is rotating and its rotation speed is neither the first rotation speed nor the second rotation speed, the switching button 95 lights up, blinks, or is turned off corresponding to the previous state of the rotating shaft 53. For example, if the previous state of the rotating shaft 53 rotating at a rotation speed other than the first rotation speed and the second rotation speed is the second rotation speed, the switching button 95 flashes in response to the second rotation speed.

[0056] (Electrical configuration of false twisting machine) Next, the electrical configuration of the false twisting machine 1 is shown in FIG. 7. The false twisting machine 1 has a control means 60. The control means 60 controls the multiple twisting device drive motors 56, the first roller drive motor 91, and the second roller drive motor 92. The control means 60 is electrically connected to the multiple twisting device drive motors 56, the first roller drive motor 91, the second roller drive motor 92, and a switch button 95. The first roller drive motor 91 is provided in common for the first feed rollers 11 of the multiple spindles 25. The single first roller drive motor 91 is connected to the multiple first feed rollers 11. The second roller drive motor 92 is provided in common for the second feed rollers 16 of the multiple spindles 25. The single second roller drive motor 92 is connected to the multiple second feed rollers 16. The first roller drive motor 91 and the second roller drive motor 92 are arranged, for example, at the end of the false twisting machine 1 in the machine frame longitudinal direction. 7 shows only some of the first feed rollers 11, and the rest are omitted. The same is true for the second feed rollers 16.

[0057] The twisting device drive motor 56 is connected to the rotating shaft 53. When a switching signal for switching the rotation speed of the rotating shaft 53 is sent from the switching button 95, the control means 60 controls the twisting device drive motor 56 corresponding to the switching button 95 to drive the rotation of the rotating shaft 53. FIG. 7 shows only some of the multiple twisting devices 15, and the others are omitted. In this embodiment, the twisting device drive motor 56 is built into the twisting device 15, but the twisting device drive motor 56 may be provided outside the twisting device 15. Also, although one control means 60 is provided in common to the multiple twisting devices 15, multiple control means 60 may be provided individually to the multiple twisting devices 15.

[0058] In this embodiment, the twisting device drive motors 56, the first yarn feed roller drive motor 91, and the second yarn feed roller drive motor 92 are controlled independently by the control means 60. In other words, the rotational drive of the multiple rotating shafts 53 by the twisting device drive motor 56, the drive of the multiple first feed rollers 11 by the first roller drive motor 91, and the drive of the multiple second feed rollers 16 by the second roller drive motor 92 are each performed independently.

[0059] (Threading onto the false twisting machine) Next, the procedure for threading the yarn Y on the false twisting machine 1 will be described below with reference to FIGS. 8 and 9. FIG. 8 is a flow chart showing the procedure for threading the yarn on the false twisting machine 1. FIG. 9(a) is a graph showing the fluctuation in the rotation speed of the rotating shaft 53 and the transition of the yarn tension with the progress of threading when threading is performed at the start of the operation of the false twisting machine 1. FIG. 9(b) is a graph showing the fluctuation in the rotation speed of the rotating shaft 53 and the transition of the yarn tension with the progress of threading when threading is performed in the middle of winding the yarn Y by the winding section 4. The yarn tension is a measured value of the tension of the yarn Y traveling between the twisting device 15 and the second feed roller 16. The rotation speed of the rotating shaft 53 in FIG. 9 refers to the rotation speed of the rotating shafts 53 of the three disk units 51 of the twisting device 15 to be threaded. The three rotating shafts 53 provided in one twisting device 15 have the same rotation speed. In Fig. 9(a) and Fig. 9(b), the rotation speed of the rotating shaft 53 is indicated by a solid line, and the yarn tension is indicated by a two-dot chain line. Fig. 9 relatively shows the rotation speed and yarn tension of the rotating shaft 53 at each step of threading (see Fig. 8 described later), and the specific numerical values ​​of the rotation speed and yarn tension of the rotating shaft 53 are omitted. Below, a procedure for threading the yarn Y around the twisting device 15 to be threaded among the multiple twisting devices 15, and the components of the processing unit 3 and the winding unit 4 arranged upstream and downstream in the yarn running direction of the twisting device 15 will be described. Note that the first feed roller 11, the second feed roller 16, the third feed roller 18, and the fourth feed roller 20 are assumed to be rotating during threading.

[0060] First, the operator sucks and holds the yarn Y supplied from the yarn supplying unit 2 by a suction gun (not shown) that sucks and holds the yarn Y (step S1). Note that step S1 is performed when the rotating shaft 53 is in a stopped state or when the rotating shaft 53 is rotating at a first rotation speed (see Figs. 9(a) and 9(b)). Next, the operator operates the switch button 95 to switch the rotation speed of the multiple rotating shafts 53 of the twisting device 15 to be threaded to a second rotation speed (step S2). Step S2 corresponds to the switching step of the present invention. Note that, when threading is performed when starting the operation of the false twisting machine 1, the multiple rotating shafts 53 are switched from a stopped state to a second rotation speed. In this case, the operator presses the switch button 95 twice. As a result, the multiple rotating shafts 53 start accelerating from a stopped state to the second rotation speed (see S2a in Fig. 9(a)). Furthermore, when the yarn Y is being wound by the winding unit 4 and the multiple rotating shafts 53 are rotating at the first rotation speed, if, for example, the yarn breaks and it becomes necessary to re-wind the yarn around the multiple discs 55, the rotation speed of the multiple rotating shafts 53 is switched from the first rotation speed to the second rotation speed. In this case, the operator presses the switch button 95 once. As a result, the multiple rotating shafts 53 start to decelerate from the first rotation speed to the second rotation speed (see S2b in FIG. 9(b)).

[0061] Next, the operator operates the suction gun to hook the yarn Y onto the second feed roller 16 (step S3). Step S3 corresponds to the roller threading process of the present invention. Step S3 is started during the period from when step S2 is performed until the rotation speed of the multiple rotating shafts 53 reaches the second rotation speed. That is, step S3 is performed while the multiple rotating shafts 53 are accelerating from a stopped state to the second rotation speed, or while the multiple rotating shafts 53 are decelerating from the first rotation speed to the second rotation speed (see FIGS. 9(a) and 9(b)).

[0062] Next, the suction gun is placed at a predetermined position, and the yarn is threaded on the twisting device 15 using a rod-shaped holding member 101 (see FIG. 10) (step S4). A specific description will be given below. The holding member 101 is configured so that the yarn Y can be threaded on its tip. The operator first holds the upstream part of the yarn Y from the suction gun on the holding member 101. Then, the operator operates the holding member 101 holding the yarn to pass the yarn Y between the rotating disks 55 of each disk unit 51, thereby threading the yarn on the twisting device 15. Step S4 corresponds to the twisting device threading step of the present invention. Step S4 may be performed when the rotation speed of the multiple rotating shafts 53 is accelerating toward the second rotation speed, or when the rotation speed of the multiple rotating shafts 53 is decelerating from the first rotation speed to the second rotation speed. However, step S4 is preferably performed after the rotation speed of the multiple rotating shafts 53 reaches the second rotation speed.

[0063] Next, the operator operates the switch button 95 to switch the rotation speed of the multiple rotating shafts 53 of the twisting device 15 to be threaded to the first rotation speed (step S5). Specifically, the operator presses the switch button 95 once. As a result, the rotation speed of the multiple rotating shafts 53 starts to accelerate from the second rotation speed to the first rotation speed.

[0064] Next, the operator operates the holding member 101 holding the yarn Y to hook the yarn Y around the twist stop guide 12 (step S6). Note that, between hooking the yarn Y around the twisting device 15 and hooking the yarn Y around the twist stop guide 12, the yarn is hooked around the first heating device 13 and the cooling device 14, but a description thereof will be omitted in this embodiment. After step S6, the operator operates the holding member 101 holding the yarn Y to hook the yarn Y around the first feed roller 11 (step S7). Steps S6 and S7 may be performed after the rotation speed of the multiple rotating shafts 53 reaches the first rotation speed, or may be performed before the first rotation speed is reached.

[0065] After step S7 is completed and the rotation speeds of the multiple rotating shafts 53 reach the first rotation speed, the operator operates the suction gun placed at a predetermined position to hang the yarn Y around each component of the processing unit 3 arranged downstream of the second feed roller 20 and the winding unit 4 (step S8). That is, in step S8, the yarn Y is hung around the intertwining device 17, the third feed roller 18, the second heating device 19, the fourth feed roller 20, and the winding device 21 in this order.

[0066] In this manner, threading of the yarn through the false twisting machine 1 is completed.

[0067] (effect) As described above, the false twisting machine 1 of this embodiment includes a plurality of spindles 25, each including a twisting device 15, a first feed roller 11 disposed upstream of the twisting device 15 in the yarn running direction, and a second feed roller 16 disposed downstream of the twisting device 15 in the yarn running direction. The false twisting machine 1 includes a plurality of twisting device drive motors 56 provided individually for the twisting devices 15 of the plurality of spindles 25, a first roller drive motor 91 provided in common for the first feed rollers 11 of the plurality of spindles 25 and driving to rotate the plurality of first feed rollers 11, a second roller drive motor 92 provided in common for the second feed rollers 16 of the plurality of spindles 25 and driving to rotate the plurality of second feed rollers 16, a control means 60, and a plurality of switch buttons 95 provided individually for the twisting devices 15 of the plurality of spindles 25. The twisting device 15 has a plurality of disk units 51 including a plurality of disks 55 and a rotating shaft 53 for rotating the plurality of disks 55, and can impart twist to the yarn Y traveling between the plurality of disk units 51 by rotating the rotating shaft 53 of each disk unit 51. Each twisting device drive motor 56 rotates and drives the rotating shaft 53 of each disk unit 51 of the corresponding twisting device 15. The control means 60 controls each twisting device drive motor 56, the first roller drive motor 91, and the second roller drive motor 92. Each switching button 95 generates a switching signal for switching the rotation speed of each rotating shaft 53 driven by the corresponding twisting device drive motor 56 between at least a first rotation speed, which is a rotation speed during production of the yarn Y, and a second rotation speed, which is a rotation speed slower than the first rotation speed, by manual operation, and sends the switching signal to the control means 60. According to this embodiment, the operator manually operates the switch button 95 to switch the rotational speed of the rotating shaft 53 of the disk unit 51 of the twisting device 15 that is the target of yarn threading among the twisting devices 15 of the multiple spindles 25 from a first rotational speed, which is the rotational speed during production of the yarn Y, to a second rotational speed, which is a rotational speed slower than the first rotational speed, and then performs yarn threading, which has the following advantages.That is, since the rotation speed of the rotating shaft 53 is slower than when the rotating shaft 53 is at the first rotation speed during the production of the yarn Y, the tension of the yarn Y can be prevented from fluctuating significantly due to contact of the yarn Y with the rotating disk 55 (see FIGS. 9(a) and (b)). Similarly, even when threading is performed while the rotation speed of the rotating shaft 53 is decelerating from the first rotation speed to the second rotation speed, or while the rotation speed of the rotating shaft 53 is accelerating to the second rotation speed, the tension of the yarn Y can be prevented from fluctuating significantly compared to when the rotating shaft 53 is at the first rotation speed. Then, when the operator operates the holding member 101 holding the yarn Y during threading on the twisting device 15, the pulling of the holding member 101 due to the yarn tension is suppressed. This makes it easy to thread the yarn Y by passing it between the multiple disk units 51 while avoiding contact between the holding member 101 and the disk 55. Furthermore, according to this embodiment, the rotation speed of the rotating shaft 53 of the twisting device 15 other than the target yarn threading can be maintained at the first rotation speed, thereby suppressing a decrease in the production efficiency of the yarn Y of the false twisting machine 1 as a whole.

[0068] In addition, in this embodiment, since the yarn Y can be passed between the disks 55 without opening the gap between the disks 55, there is no need to secure a space for moving the disks 55 as in the case of an open-close type twisting device. Therefore, compared to the case of using an open-close type twisting device, the false twisting machine 1 can be made smaller, and the production efficiency per site is improved. In general, compared to the case of an open-close type twisting device, it is difficult to thread the yarn on the twisting device 15 without opening the gap between the disks 55. However, in this embodiment, threading can be easily performed by threading the yarn in a state in which the rotating shaft 53 is rotated at a low second rotation speed or in a state in which the rotating shaft 53 is decelerating or accelerating toward the second rotation speed, so that the advantage of using the twisting device 15 of a type that does not open the gap between the disks 55 can be fully utilized.

[0069] Furthermore, in this embodiment, the twisting device drive motors 56, the first roller drive motor 91, and the second roller drive motor 92 are controlled independently of each other. In other words, the twisting device drive motor 56 drives the rotation of the multiple rotating shafts 53 independently of the drive of the multiple first feed rollers 11 by the first roller drive motor 91 and the drive of the second feed roller 16 by the second roller drive motor 92. Therefore, even if the rotation speed of the rotating shaft 53 of the twisting device 15 to be threaded is switched to the second rotation speed, the rotation speeds of the multiple first feed rollers 11 and the multiple second feed rollers 16 do not decrease. This makes it possible to prevent a decrease in the production efficiency of the entire false twisting machine 1 during threading.

[0070] Furthermore, the false twisting machine 1 of this embodiment includes multiple switch buttons 95 as notification units individually provided for the twisting devices 15 of the multiple spindles 25. Each switch button 95 notifies that the rotation speed of the multiple rotating shafts 53 of the twisting device 15 has reached the second rotation speed. According to this embodiment, the operator can know whether the rotation speed of the disk 55 of each twisting device 15 has reached the second rotation speed or not. This prevents the operator from erroneously threading yarn when the disk 55 of the twisting device 15 to be threaded is at the first rotation speed.

[0071] In the false twisting machine 1 of this embodiment, the switching button 95 as an alarm notifies that the rotation speed of each rotating shaft 53 has reached the second rotation speed by a lighting or blinking pattern of a lamp. According to this embodiment, the operator can quickly visually determine the rotation speed of the rotating shaft 53 of each twisting device 15.

[0072] Furthermore, in the false twisting machine 1 of this embodiment, a switching button 95 is provided for each of the twisting devices 15 of the multiple spindles 25. Each switching button 95 sends a switching signal to the control means 60 to switch the rotation speed of each disk 55 driven by the corresponding twisting device drive motor 56. In this embodiment, when a switching signal for switching the rotation speed of a disk 55 driven by an arbitrary twisting device drive motor 56 is to be sent to the control means 60, the operator only needs to operate the switching button 95 provided for that twisting device drive motor 56. This makes it possible to prevent the operator from mistakenly changing the rotation speed of the rotation shaft 53 of another twisting device 15 that is not the target for threading.

[0073] Furthermore, in the false twisting machine 1 of this embodiment, the switching signal includes a signal for switching each rotating shaft 53 driven by the corresponding twisting device drive motor 56 to a stopped state in which rotation is stopped. According to this embodiment, when the yarn Y is entangled on the disk 55, the rotation of the rotating shaft 53 can be stopped individually for each twisting device 15. Therefore, for the twisting devices 15 in which the yarn Y is not entangled on the disk 55, the rotation speed of the rotating shaft 53 can be maintained at the first rotation speed, thereby suppressing a decrease in the production efficiency of the yarn Y of the false twisting machine 1 as a whole.

[0074] The threading method of the present embodiment is a threading method for threading a yarn Y on a false twisting machine 1 configured to be able to switch the rotation speed of the rotating shaft 53 of each disk unit 51 of the twisting device 15 of the multiple spindles 25 between at least a first rotation speed, which is the rotation speed during production of the yarn Y, and a second rotation speed, which is a rotation speed slower than the first rotation speed. Each spindle 25 includes a twisting device 15 having a plurality of disk units 51 including a plurality of disks 55 and a rotating shaft 53 for rotating the plurality of disks 55, and the twisting device 15 is capable of imparting twist to the yarn Y traveling between the plurality of disk units 51 by rotating the rotating shaft 53 of each disk unit 51. The threading method includes a switching step and a twisting device threading step. The switching step is a step of switching the rotation speed of each rotating shaft 53 of the twisting device 15 to be threaded among the twisting devices 15 of the multiple spindles 25 to the second rotation speed. The twisting device threading process is a process of threading the yarn Y on the twisting device 15 to be threaded by passing the yarn Y between the disk units 51 when each rotating shaft 53 rotates at the second rotation speed, when the rotation speed is decreasing from the first rotation speed to the second rotation speed, or when the rotation speed is increasing toward the second rotation speed. According to this embodiment, the following advantages are obtained by switching the rotation speed of the rotating shaft 53 of each disk unit 51 of the twisting device 15 to be threaded among the twisting devices 15 of the multiple spindles 25 from the first rotation speed, which is the rotation speed during production of the yarn Y, to the second rotation speed, which is the rotation speed slower than the first rotation speed, before threading. That is, since the rotation speed of the rotating shaft 53 is slower than when threading is performed when the rotating shaft 53 is at the first rotation speed during production of the yarn Y, it is possible to suppress the tension of the yarn Y from fluctuating strongly due to the yarn Y coming into contact with the rotating disk 55 (see FIGS. 9(a) and (b)). Similarly, even when threading is performed while the rotation speed of the rotating shaft 53 is decelerating from the first rotation speed to the second rotation speed, or while the rotation speed of the rotating shaft 53 is accelerating to the second rotation speed, it is possible to suppress strong fluctuations in the tension of the yarn Y compared to when threading is performed when the rotating shaft 53 is at the first rotation speed. As a result, when an operator operates the holding member 101 holding the yarn Y during threading on the twisting device 15, pulling of the holding member 101 due to the yarn tension is suppressed.This makes it easy to thread the yarn Y by passing it between the multiple disk units 51 while avoiding contact between the holding member 101 and the disks 55. Furthermore, according to this embodiment, the rotation speed of the rotation shaft 53 of the twisting device 15 other than the target for threading can be maintained at the first rotation speed, so that a decrease in the production efficiency of the yarn Y of the false twisting machine 1 as a whole can be suppressed.

[0075] In addition, in this embodiment, since the yarn Y can be passed between the disks 55 without opening the gap between the disks 55, there is no need to secure a space for moving the disks 55 as in the case of an open-close type twisting device. Therefore, compared to the case of using an open-close type twisting device, the false twisting machine 1 can be made smaller, and the production efficiency per site is improved. In general, compared to the case of an open-close type twisting device, it is difficult to thread the yarn on the twisting device 15 without opening the gap between the disks 55. However, in this embodiment, threading can be easily performed by threading the yarn in a state in which the rotating shaft 53 is rotated at a low second rotation speed or in a state in which the rotating shaft 53 is decelerating or accelerating toward the second rotation speed, so that the advantage of using the twisting device 15 of a type that does not open the gap between the disks 55 can be fully utilized.

[0076] In addition, in this embodiment, the yarn is threaded on the twisting device 15 while the disk 55 is rotating. By threading while the disk 55 is rotating, the portion of the circumferential surface of the disk 55 that contacts the yarn Y can be changed. This makes it possible to suppress local wear on the circumferential surface of the disk 55. As a result, it is possible to suppress fluctuations in the contact state between the yarn Y and the circumferential surface of the disk 55, and to suppress deterioration of the yarn quality.

[0077] Furthermore, in the threading method of the present embodiment, the twisting device threading step is preferably performed after the rotation speed of each rotating shaft 53 reaches the second rotation speed. In this way, the twisting device threading step is performed in a state in which the rotation speed of the multiple rotating shafts 53 is constant at the second rotation speed. This stabilizes the yarn tension generated by contact between the yarn Y and the circumferential surface of the disk 55, thereby making it possible to avoid a situation in which the holding member 101 becomes difficult to operate due to large fluctuations in yarn tension, and thus facilitating threading.

[0078] In the yarn threading method of this embodiment, each spindle 25 arranged in the false twisting machine 1 includes a second feed roller 16 arranged downstream of the twisting device 15 in the yarn running direction, and further includes a roller threading step of threading the yarn Y around the rotating second feed roller 16 arranged downstream of the twisting device 15 to be threaded. The twisting device threading step is performed after the roller threading step. According to this embodiment, by first threading the yarn Y around the rotating second feed roller 16, the yarn Y is pulled by the second feed roller 16 and the yarn Y is in a taut state in the yarn running direction. The taut yarn Y is less likely to sway than a slack yarn. This makes it even easier to thread the yarn around the twisting device 15.

[0079] Furthermore, in the threading method of the present embodiment, the roller threading process is started during the time period until the rotation speed of each rotating shaft 53 reaches the second rotation speed after the switching process is performed. According to the present embodiment, the roller threading process is started during the time period until the rotation speed of each rotating shaft 53 reaches the second rotation speed, thereby making it possible to shorten the operation time.

[0080] (Modification) Modifications of the above embodiment will be described below, with the same reference numerals being used to designate components similar to those in the above embodiment, and descriptions thereof will be omitted where appropriate.

[0081] In the above embodiment, the switching button 95 as the switching means of the present invention is provided for each of the twisting device drive motors 56 of the multiple spindles 25. Each switching button 95 is configured to send a generated predetermined switching signal to the control means 60. However, the switching means of the present invention is not limited to the configuration of the above embodiment. For example, the switching means may be included in a single central operation panel connected to the multiple twisting device drive motors 56. The central operation panel has multiple switching means corresponding to the twisting device drive motors 56 of the multiple spindles 25 individually. As a specific example, the switching means is, for example, a signal input unit such as an icon displayed on the central operation panel, and is multiple signal input units corresponding to the twisting device drive motors 56 of the multiple spindles 25 individually. In this case, the operator individually operates the multiple signal input units displayed on the central operation panel to generate a switching signal that switches the rotation speed of the rotating shaft 53 driven by the corresponding twisting device drive motor 56 between a first rotation speed, a second rotation speed, and a stopped state.

[0082] In the above embodiment, the switching signal includes a signal for switching to a stopped state to stop the rotation of each rotating shaft 53 driven by the corresponding twisting device drive motor 56. However, the switching signal does not have to include a signal for switching to a stopped state to stop the rotation of each rotating shaft 53 driven by the corresponding twisting device drive motor 56. In this case, for example, the switching to the stopped state of each rotating shaft 53 provided in each twisting device 15 is performed collectively for all twisting devices 15.

[0083] In the above embodiment, the switching button 95 has a built-in single-color lamp that indicates either lighting, flashing, or off. However, the switching button 95 may be a lamp that indicates a plurality of colors. In this case, for example, the switching button 95 indicates the rotation speed of the rotating shaft 53 by the color of the lit lamp.

[0084] Also, the switch button 95 does not have to have a built-in lamp. For example, a lamp as a notification unit of the present invention may be provided for each twisting device 15 separately from the switch button 95. In this case, for example, the lamp is turned on when the rotation speed of the rotating shaft 53 reaches the second rotation speed. Furthermore, multiple lamps (for example, three) may be provided for each twisting device 15. In this case, the multiple lamps include a first lamp that is turned on when the rotation speed of the rotating shaft 53 reaches the second rotation speed, and a second lamp that is turned on when the rotation speed of the rotating shaft 53 reaches the first rotation speed.

[0085] In the above embodiment, the yarn Y is hung on the second feed roller 16 (step S3), and then the yarn Y is hung on the twisting device 15 (step S4). However, the yarn Y may be hung on the twisting device 15 first, and then hung on the second feed roller 16. In this case, before hanging the yarn Y on the twisting device 15, the operator operates the switch button 95 to switch the rotation speed of the multiple rotation shafts 53 of the twisting device 15 to be hung to the second rotation speed.

[0086] In the above embodiment, the rotation speed of the multiple rotating shafts 53 of the twisting device 15 to be threaded is switched to the first rotation speed (step S5), and then the yarn Y is threaded on the twist stop guide 12 (step S6). However, the rotation speed of the multiple rotating shafts 53 of the twisting device 15 to be threaded may be switched to the first rotation speed after the yarn Y is threaded on the twist stop guide 12. Also, in the above embodiment, the rotation speed of the multiple rotating shafts 53 of the twisting device 15 to be threaded is switched to the first rotation speed (step S5), and then the yarn Y is threaded on the first feed roller 11 (step S7). However, the rotation speed of the multiple rotating shafts 53 of the twisting device 15 to be threaded may be switched to the first rotation speed after the yarn Y is threaded on the first feed roller 11. However, the yarn Y needs to be threaded on the first feed roller 11 after being threaded on the twist stop guide 12.

[0087] In the above embodiment, in step S6, the yarn Y is hooked around the twist stop guide 12. However, in the case where the twist stop guide 12 is configured to be movable between a retracted position when the yarn Y is hooked around the twisting device 15 and an operating position when the yarn Y is wound by the winding unit 4, the following operation is performed. That is, in step S6, after the yarn Y is hooked around the twist stop guide 12, the twist stop guide 12 is further moved to the operating position.

[0088] In the above embodiment, the yarn Y is hung on the first heating device 13 and the cooling device 14 after being hung on the twisting device 15 and before being hung on the twist stop guide 12. However, after the yarn Y is hung on the twisting device 15, the yarn Y may be hung on the twist stop guide 12 and then hung on the first heating device 13 and the cooling device 14. The order of hanging the yarn on the twist stop guide 12, the first heating device 13, and the cooling device 14 may vary depending on the type of yarn and the device configuration.

[0089] In the above embodiment, the twisting device 15 is a three-axis twisting device 15 having three rotation axes. However, the twisting device may be a five-axis twisting device having five rotation axes.

[0090] In the twisting device 1 of the above embodiment, each rotating shaft 53 and the multiple disks 55 attached to the rotating shaft 53 are fixedly arranged so as not to move from the position in FIG. 4. However, the twisting device 15 is not limited to such a configuration. For example, the twisting device may be configured so that the rotating shaft 53 and the disks 55 are movable from the position in FIG. 4. In this case, by applying the configuration of the present invention, the yarn Y can be passed between the multiple disks 55 without opening the spaces between the multiple disks 55. This makes it unnecessary to secure a space for moving the disks 55, and compared to the case where the twisting device is opened and closed by moving the disks 55, the false twisting machine 1 can be made smaller, and production efficiency per site is improved.

[0091] In the above embodiment, the first roller drive motor 91 is provided in common for the first feed rollers 11 of all the spindles 25 arranged in the false twisting machine 1. However, the first roller drive motor 91 may be provided in common for the first feed rollers 11 of at least two spindles 25 among all the spindles 25 arranged in the false twisting machine 1. For example, when 12 spindles 25 are arranged, the first roller drive motor 91 may be provided in common for every four spindles 25. In this case, three first roller drive motors 91 are provided for the first feed rollers 11 of the 12 spindles 25. The same applies to the second roller drive motor 92. That is, the second roller drive motor 92 may be provided in common for the second feed rollers 16 of at least two spindles 25 among all the spindles 25 arranged in the false twisting machine 1.

[0092] In the twisting device 15 of the above embodiment, the multiple disks 55 are arranged to draw a spiral. However, the twisting device 15 is not limited to the multiple disks 55 being arranged to draw a spiral. [Explanation of symbols]

[0093] 1 False twisting machine 4 Winding section 11 First feed roller (first yarn feed roller) 15 Twisting device 16 Second feed roller (second yarn feed roller) 25 weight 51 Disk Unit 53 Rotation axis 55 Disc 56 Twisting device drive motor (twisting device drive mechanism) 60 Control Means 91 First roller drive motor (first yarn feed roller drive mechanism) 92 Second roller drive motor (second yarn feed roller drive mechanism) 95 Switching button (switching means and notification unit) 101 Retaining member Y Thread

Claims

1. A twisting device; A first yarn feed roller arranged upstream of the twisting device in a yarn running direction in which the yarn runs; A second yarn feed roller arranged downstream of the twisting device in the yarn running direction; A plurality of weights including A plurality of twisting device drive mechanisms provided individually for the twisting devices of the plurality of spindles; a first yarn feeding roller drive mechanism provided in common with respect to the first yarn feeding rollers of the plurality of spindles and configured to rotate and drive the plurality of first yarn feeding rollers; a second yarn feed roller drive mechanism provided in common with respect to the second yarn feed rollers of the plurality of spindles and configured to rotate and drive the plurality of second yarn feed rollers; A control means; A plurality of switching means provided individually for the twisting devices of the plurality of spindles; Equipped with The twisting device is The present invention provides a method for recording and recording information on a disk unit including the steps of: The rotation of the rotation shaft of each of the disk units can impart twist to the yarn traveling between the disk units, Each of the twisting device drive mechanisms rotates and drives a rotation shaft of each of the disk units of the corresponding twisting device, the control means controls each of the twisting device drive mechanisms, the first yarn feed roller drive mechanism, and the second yarn feed roller drive mechanism; Each of the switching means is generating a switching signal for switching, by manual operation, the rotation speed of each of the rotating shafts driven by the corresponding twisting device drive mechanism between at least a first rotation speed, which is a rotation speed during yarn production, and a second rotation speed, which is a rotation speed slower than the first rotation speed; a false twisting machine sending the switching signal to the control means;

2. A plurality of notification units are provided individually for the twisting devices of the plurality of spindles, The false twisting machine according to claim 1 , wherein each of the notification sections notifies that the rotation speed of each of the rotary shafts driven by the corresponding twisting device drive mechanisms has reached the second rotation speed.

3. 3. The false twisting machine according to claim 2, wherein the notification unit notifies that the rotation speed of each of the rotating shafts has reached the second rotation speed by a lighting or blinking pattern of a lamp.

4. The false twisting machine according to any one of claims 1 to 3, wherein the switching signal includes a signal for switching each of the rotating shafts driven by the corresponding twisting device drive mechanisms to a stopped state in which rotation is stopped.

5. A yarn threading method for threading a yarn on a false twisting machine, the false twisting machine including a plurality of twisting devices having disk units each including a plurality of disks and a rotating shaft for rotating the plurality of disks, the plurality of spindles including twisting devices capable of imparting twist to a yarn running between the plurality of disk units by the rotation of the rotating shaft of each of the disk units, the false twisting machine being configured such that the rotation speed of the rotating shaft of each of the disk units of the twisting devices of the plurality of spindles can be switched at least between a first rotation speed which is a rotation speed during yarn production, and a second rotation speed which is slower than the first rotation speed, a switching step of switching the rotation speed of each of the rotation shafts to the second rotation speed for a twisting device that is a yarn threading target among the twisting devices of the plurality of spindles; a twisting device threading process of threading a yarn on the twisting device to be threaded by passing the yarn between the plurality of disk units while each of the rotating shafts is rotating at the second rotation speed, while the rotation speed is decreasing from the first rotation speed to the second rotation speed, or while the rotation speed is increasing toward the second rotation speed; A threading method comprising:

6. The yarn threading method according to claim 5 , wherein the twisting device yarn threading step is performed after the rotation speeds of the rotary shafts reach the second rotation speed.

7. Each spindle disposed in the false twisting machine includes a second yarn feed roller disposed downstream of the twisting device in a yarn running direction in which the yarn runs, The method further includes a roller threading step of threading the yarn around the second yarn feed roller that is arranged downstream of the twisting device to be threaded, The yarn threading method according to claim 5 or 6, wherein the twisting device yarn threading step is performed after the roller yarn threading step.

8. The yarn threading method according to claim 7 , wherein the roller yarn threading step is started during a period from when the switching step is performed until the rotation speeds of the respective rotary shafts reach the second rotation speed.

Images