TWI425127B - Clamp type false twisting device - Google Patents

Description

Clamp-type false twist device

The present invention relates to a clamp-type false twist device for imparting false twist to a filament.

A false twisting machine that conventionally applies false twisting to a multifilament yarn has a false twisting device for imparting false twist to the filament. The false twist device makes the belts wound around a pair of pulleys cross each other, and a twisted clamp type false twist device (clamp type twisting device) is known in the cross portion at the intersection portion (for example, see Japan) Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. Further, a nipper type false twisting device in which a pair of endless belts are wound around a pair of pulleys is also known (for example, see Japanese Patent Laid-Open Publication No. Hei 6-33328). The false twisting device divides one yarn into two pieces and is less likely to slip between the yarn and the belt.

On the other hand, in the parallel three-axis mandrel, a plurality of friction discs are respectively provided, and the yarn is twisted by the twisting of the yarn while the yarn is in contact with the peripheral surface between the plurality of rotating friction discs. The squatting false twist device is also well known.

The former clamp-type false twist device can clamp the yarn with a high contact pressure between the intersecting belts to impart a twist. Therefore, when a roving (for example, a yarn of 300 denier or more) is subjected to false twist processing or the like, it is necessary to impart a certain degree of strength to the yarn, and it is advantageous in comparison with the latter friction type. .

On the other hand, when a relatively thin yarn is subjected to false twist processing, the force acting on the yarn can be weak. At this time, in the clamp type false twisting device, although the contact pressure between the small belt and the yarn is set at the time of clamping, when the above setting value is small, the influence of the device error or the vibration or deflection of the belt cannot be ignored. For example, adjusting the air pressure exerted by the belt on one side toward the belt on the other side to set the contact pressure. When the set value of the air pressure is small, the actual effect on the yarn is caused by the influence of the device error or belt vibration or deflection. The contact pressure (effective contact pressure) on the top changes. Therefore, when the effective contact pressure fluctuates, it is easy to impart a specific twist to the yarn when the yarn is twisted once, and the twist of the plurality of filaments constituting the yarn is uneven. As a result, the lengths of the plurality of filaments are uneven, and the filaments are easily broken, and as a result, a large number of hairiness is formed. On the other hand, in the friction twisting type, the twisting angle of each filament can be roughly determined by the size, shape and arrangement of the friction disc, and the twisting is gradually given by the majority of the friction discs, and the clamp type The specific angle can stabilize the twist angle of each filament. Therefore, when the clamp type false twisting device applies false twisting to the spun yarn, a large amount of hairiness tends to occur as compared with the friction disc type.

Further, the caliper-type false twist device disclosed in Patent Document 3 divides one yarn into two pieces, but does not allow the yarn to be twisted evenly over the entire length to prevent the yarn from being twisted. The purpose of homogenizing the plurality of filaments constituting the yarn is for the purpose.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a false twist device which can process a wide range of filaments of a spun yarn or even a roving, and which can suppress the generation of hairiness in such thickness ranges.

A caliper-type false twisting device according to a first aspect of the present invention includes two yarn-twisting units, and the yoke-clamping device that clamps the yarn by the two yarn nip-in units and imparts the yarn yam rotation is characterized in that the yarn tongs are Each of the units has a plurality of yarn clamping members, and the plurality of yarn clamping members are arranged side by side, and further, grooves are formed on the surfaces of the contact yarns of the respective yarn clamping members to divide the yarn contacting surfaces.

According to this configuration, since the yarn clamping members are arranged in a plurality of pairs, the clamping length (the length of the yarn clamping portion) is increased, and even if a large pressing force imparts a yarn clamping member to the actual contact pressure of the yarn ( Since the effective contact pressure becomes low, the effective contact pressure is lowered to apply a large pressing force to the yarn clamping member, and the yarn can be clamped into the member to perform the processing of the spun yarn. When the length of the clamp is increased, the twisting torque of the yarn is given, and the roving can also be processed. That is, a wide range of yarns from the spun yarn to the roving can be processed. Further, the divided grooves are not limited to one, and may be two or more.

Further, the surfaces of the yarn clamping members of the respective pairs are separately divided by the grooves, so that the number of times of clamping a single yarn is further increased. As described above, by kneading the yarn a plurality of times, it is possible to impart equal twisting to all the yarns constituting the filaments, to uniformize the twist angle of all the filaments, and to stably propagate the twist. It is possible to form a small filament in a state in which the length of each filament per unit length is not uniform, which is less likely to cause filament breakage and suppress the generation of hairiness.

Further, each of the yarn clamping units includes a pair of pulleys, and the yarn clamping member is a plurality of endless belts wound around a pair of pulleys, and a groove having a V-shaped cross section is formed in each of the endless belts. Configure to make the above ring The belts cross each other to form a cross portion of the yarn, and a plurality of the endless belts are arranged and wound on the pair of pulleys, and the contact surfaces of the yarns of the endless belts are formed to extend along the longitudinal direction of the belt. The groove divides the contact surface of the yarn of the endless belt by the above-mentioned groove.

As described above, the yarn tongs member has a configuration in which an endless belt is used, and the same effects as described above can be obtained. By winding a plurality of belts on one pair of pulleys, the belt warpage of one belt can be suppressed, and the yarn can be processed stably.

According to a second aspect of the invention, in the first aspect of the invention, the one pair of pulleys are arranged in a winding manner in two annular belts. When the number of the endless belts wound around the pair of pulleys is too large, there is a problem that the power consumption is excessively increased when the pulleys are driven. Therefore, the number of endless belts wound around a pair of pulleys is such that the minimum number of strips required to produce hairiness is suppressed, that is, two degrees are preferable.

According to a third aspect of the invention, in the first aspect or the second aspect of the invention, the outer peripheral surface of each of the pulleys is formed with a plurality of annular curved surface portions that protrude outward in the axial direction.

According to this configuration, the two endless belts are wound around the two annular curved surface portions, so that the two belts can be prevented from being stably separated from the axial direction of the pulley to stabilize the yarn processing.

According to a fourth aspect of the invention, in the clamp type false twisting device of the first invention, the nip member of the one yarn nip unit is an annular portion provided on at least one side surface of the rotatable disc, and the other The yarn clamping member of the side yarn clamping unit is wound around a pair of pulleys, and has an elastic and elastic endless belt with respect to one side of the disc, and the one side of the disc is concentric a plurality of the above-mentioned annular portions are disposed, and a plurality of the above-mentioned endless belts are arranged and wound around the pair of pulleys, and grooves in the circumferential direction are formed on the surface of each of the annular yarn contacting portions, and at the same time in each ring shape The yarn contacting surface of the belt is formed with a groove extending in the longitudinal direction thereof.

As described above, the yarn crease member is formed by using an annular portion provided on at least one side surface of the rotatable disc and an endless belt wound around the pair of pulleys, and the same effect as the first invention described above can be obtained. .

Next, an embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a schematic configuration diagram of an extension false twisting machine 100 of the present embodiment. As shown in Fig. 1, the extension false twisting machine 100 includes a yarn supplying portion 1A for holding the yarn supplying package 101, and a yarn Y for unwinding the yarn supplying package 101 of the yarn supplying portion 1A. The processing unit 1B and the yarn Y after the winding processing form the winding unit 1C of the appropriate package.

The extension false twisting machine 100 includes a processing unit (spindle) including a plurality of the yarn supplying units 1A and the processing unit 1B and the winding unit 1C. The plurality of spindles are arranged in a vertical direction with respect to the paper surface of Fig. 1. The yarn supplying unit 1A and the winding unit 1C are arranged such that the amount of 2 to 4 spindles is overlapped in order to reduce the installation space.

The yarn supplying section 1A of each spindle is provided with a bobbin 201 that holds the yarn supplying package 101, and each of the bobbins 201 is attached to a common pallet 202 by a plurality of spindles.

The processing unit 1B of each spindle includes a first yarn supplying roller 110, a primary heater 102, a cooler 103, a false twisting device 104, and a second yarn supplying roller 111 which are disposed in this order along the flow direction of the yarn Y. The interlacing nozzle 105, the secondary heater 106, the third yarn supplying roller 112, and the like.

The first to third yarn supplying rollers 110 to 112 are used as the conveying yarn Y. The yarn feeding speed is set so that the yarn supplying speed of the second yarn supplying roller 111 is faster than that of the first yarn supplying roller 110, and the yarn supplying speed of the third yarn supplying roller 112 is slower than that of the second yarn supplying roller 111. Therefore, the yarn Y extends between the first yarn supplying roller 110 and the second yarn supplying roller 111, and the yarn Y is loosened between the second yarn supplying roller 111 and the third yarn supplying roller 112.

The yarn Y extending between the first yarn supplying roller 110 and the second yarn supplying roller 111 is twisted by a clamp type false twisting device 104 (clamp type twisting machine) to be described later. More specifically, the yarn Y is twisted between the first yarn supplying roller 110 and the false twisting device 104, and the yarn Y that is continuously extended and twisted is heat-set after the primary heater 102 is cooled, and the cooler 103 (cooling plate) is used. cool down. The twisted and heat set yarn Y is untwisted by the false twist device 104. The yarn Y subjected to the extension false twist processing described above is formed by the air jet from the interlacing nozzle to form an interlaced portion, giving the same degree of bundleability as the twisted yarn. The yarn Y imparted to the bundle by the interlacing nozzle 105 is subjected to relaxation heat treatment by the secondary heater 106, and wound up in the winding portion 1C to form a package.

Between the false twisting device 104 and the second yarn supplying roller 111, a fixed guide 107 for suppressing the propagation of the yarn Y to the downstream is provided, and the winding angle of the set yarn Y toward the fixed guide 107 is predetermined. Guide roller 108 above angle. The stator guide 107 and the guide roller 108 will be described in detail later.

Next, the false twist device 104 (clamp type false twist device) will be described in detail. 2 is a perspective view of the false twist device 104. As shown in Fig. 2, the false twisting device 104 includes two sets of belt units (yarn clamping units) 20 each having a pair of pulleys 10, 11 and an endless belt 112 wound around the pair of pulleys 10, 11. (20A, 20B).

The pair of pulleys 10 and 11 of each belt unit 20 have the same structure, but one of the pulleys 10 is a drive pulley that is rotationally driven by a motor (not shown) via a drive shaft 13, and the other pulley 11 is The belt 12 is driven to rotate the driven pulley around a driven shaft (not shown). 3 is a cross-sectional view of the drive pulley 10. As shown in FIG. 3, the pulley 10 is externally fitted to the front end portion of the drive shaft 13, and is configured to rotate integrally with the drive shaft 13.

As shown in Fig. 2, the belt units 20A and 20B of the two groups are disposed such that the belts 12 cross each other. Each of the belts 12 is mainly a rubber belt and has flexibility and elasticity. Among the two sets of the belt units 20A and 20B, one of the belt units 20A is fixed to the support shown in the drawing, and the other belt unit 20B is supported by the support body with the drive shaft 13 as a fulcrum. The belt 12 of the belt unit 20B on the swing side acts by the air pressure toward the belt 12 of the fixed side belt unit 20A, and applies a predetermined contact pressure to the yarn Y passing between the two belts 12, and is clamped at the intersection of the two belts 12. Y yarn Y. In the belt units 20A and 20B of the two sets, when the belt 12 is driven by the drive pulley 10, the yarn Y which is clamped at the intersection of the belt 12 is twisted, and the yarn Y is sent to the downstream side (Fig. 2). (below) (see Patent Documents 1, 2 above).

However, in the above-described clamp type false twisting device 104, in particular, when the spun yarn is subjected to false twist processing or the like, when the false twist is performed with a small contact pressure, the twist angle of the unstable yarn Y is likely to occur. For example, even if the pressure (air pressure) acting on the belt 12 of the swing side belt unit 20B toward the belt 12 of the fixed side belt unit 20A is fixed to a predetermined set value, the error of the device cannot be ignored or the setting value is small. The vibration or deflection of the belt 12 is caused by the influence on the contact pressure, and the contact pressure (effective contact pressure) which is actually imparted to the yarn Y is uneven. As described above, once the effective contact pressure is not uniform, the movement between the filaments on the inner side and the filaments on the outer side at the time of the twisting is imparted to each other, that is, an unstable interlayer movement (migration) is formed. Thus, different turns are formed between the plurality of filaments constituting the yarn, and the lengths of the filaments per unit length of the yarn are uneven between the plurality of filaments. Therefore, filament breakage easily occurs when the tension is applied from the false twist device 104, and as a result, a large amount of hairiness is generated. The finer the yarn Y, the easier the contact of the belts 12 that are clamped into the yarn Y with each other, and the problem of shortening the life of the belt 12 due to wear thereof.

Therefore, as shown in FIG. 2 and FIG. 3, in the false twisting device 104 of the present embodiment, two annular belts 12 are wound around one pair of pulleys 10 and 11 of each belt unit 20. Therefore, as shown in Figs. 2 and 4, one belt 12 of the belt unit 20A is in contact with the two belts 12 of the belt unit 20B, and the other belt 12 of the belt unit 20A is also in contact with the two belts 12 of the belt unit 20B. . That is, as shown in Fig. 4, the two belts 12 of the belt units 20 are all in contact with each other in the four oblique line portions. When the spun yarn is clamped by the belt 12, the belt 12 of each belt unit 20 is integrally contacted at the oblique portion of Fig. 4, but when the roving is clamped, the belt 12 of each pulley 20 is partially contacted. As shown in Fig. 3, on the outer peripheral surfaces of the pulleys 10 and 11, two annular curved surface portions 15 (convex) protruding outward are arranged in the longitudinal direction (axial direction: left-right direction of Fig. 3). Two of the two annular curved surface portions 15 are wound around the two belts 12, and the two belts 12 are not easily deviated from the longitudinal direction of the pulleys 10 and 11.

As described above, the two belts 12 are wound around the pair of pulleys 10 and 11, and the force acting on the belt 12 on the swing side is evenly distributed to the two belts 12 arranged in line, and the effective contact pressure can be reduced. More specifically, as compared with the case where one belt 12 is wound around the pair of pulleys 10, 11, as shown in Fig. 4, the relative area of the belt 12 which is four times intersected (the oblique portion of Fig. 4) is formed as long as The pushing force of the belt 12 is the same, and the surface pressure is formed by 1/4. On the other hand, in the case where one pair of pulleys 10 and 11 are wound around one belt 12, in the present embodiment, since two belts 12 are wound around one pair of pulleys 10 and 11, a double-folding length is formed ( The length of the yarn Y is clamped into the length). That is, the effective contact pressure acting on the yarn Y is formed 1/2 times. Therefore, the set value of the air pressure acting on the belt 12 is set to a large value which affects the effective contact pressure to a certain value such as an error of the negligible device, and a small contact pressure can be applied to the yarn Y. The small effective contact pressure is formed while suppressing the wear due to the contact of the two belts 12, and the life of the belt 12 can be improved. When the two belts 12 are wound around the pulleys 10 and 11, when the belt 12 is one, the warpage of the belt 12 or the like is less likely to occur.

Further, a groove 12a extending in the longitudinal direction of the belt is formed on the surface of each belt 12, and the contact surface of the yarn Y of the endless belt 12 is divided by the groove 12a.

As described above, the respective surfaces of the two belts 12 wound around the pair of pulleys 10, 11 are divided by the grooves 12a. Therefore, the yarn Y is divided into four times by the false twisting device 104. Since the yarn Y is divided into four times to impart a twist, the interlayer movement (migration) of the filaments can be stabilized to form a certain twist angle of each filament. By reducing the unevenness of the length of the filament per unit length of the yarn, the breakage of the filament is less likely to occur, and the generation of hairiness can be suppressed. The turbulent angle forms a stable and turbulent propagation at a certain time, which can increase the critical speed of processing and improve productivity.

As shown in FIGS. 2 and 3, the groove 12a is formed at the center in the width direction of the belt 12. The two belts 12 wound around the pulleys 10, 11 are arranged in close proximity.

The number of the belts 12 wound around the pair of pulleys 10 and 11 is not limited to two, and three or more of the plurality of belts 12 may be wound within a design allowable range. Further, the number of the grooves 12a provided in each of the belts 12 can be appropriately changed within the design range. Although the groove 12a shown in Fig. 3 is a V-shaped groove, it may be a groove of another shape such as a U-shaped groove or an angular groove.

Four ungrooved belts are wound around a pair of pulleys 10, 11, and four times of clamping of the yarn Y as described above can also be achieved. However, once the width of each belt is too narrow, the holding force of the pulleys 10, 11 against the belt is reduced, resulting in an increase in belt vibration. Therefore, continuously increasing the width of each belt while increasing the number of windings causes the power consumption of the motor to be very large when the drive pulley 10 is rotationally driven. From the above viewpoints, the number of the belts 12 wound around the pair of pulleys 10 and 11 can be set in an appropriate number (for example, two) in consideration of the securing operation of the false twisting device 104 and the operation cost, and at the same time, in order to increase the forceps. The number of times of entry is preferably such that grooves 12a are formed in each of the belts 12.

According to the false twisting device 104 configured as described above, the processing range (the thickness range of the processable yarn) can be increased, and the generation of the hairiness can be greatly reduced. However, the false twisting machine 100 of the present embodiment can further suppress the generation of hairiness. Composition. This configuration will be described in detail below.

As shown in Fig. 5, when the tension of the yarn on the upstream side of the false twisting device 104 is taken as the twisting tension T1 and the tension of the yarn on the downstream side of the false twisting device 104 is taken as the twisting tension T2, the ratio T2/T1 is generally called The K value and the K value are important elements that determine the physical properties or quality levels of the yarn. The larger the value of K, the larger the tension T2 is, which tends to cause filament breakage, and most hairiness occurs. Therefore, in order to suppress the generation of hairiness, it is effective to lower the K value, but when the K value is lowered, the yarn twisted by the false twist device 104 cannot be sufficiently untwisted on the downstream side, resulting in a decrease in the curling property of the yarn due to untwisting. Or the problem of the rise of the residual twist of the yarn, etc., causes the quality of the yarn to decrease. Therefore, it is preferable to suppress the generation of hairiness without lowering the K value.

However, as shown in Fig. 1, the yarn twisted by the false twisting device 104 is stretched out between the false twisting device 104 and the second yarn supplying roller 111 that holds the yarn. Here, as shown in Fig. 5, the position (untwisting point) at which the yarn Y starts to be opened is changed in accordance with the K value (T2/T1). That is, the untwisting point approaches the false twist device 104 as the value of K increases, and on the other hand, the untwisting point gradually moves away from the false twist device 104 as the value of K decreases. However, in actuality, various guides, tension sensors, and the like are disposed between the false twisting device 104 and the second yarn supplying roller 111, and members forming the yarn resistance are likely to form an unstable solution due to the cause of the resistance. Awkward. Moreover, in the unstable state, the untwisting point is liable to cause the filament length or the untwisting tension to be uneven and the hairiness to increase.

Therefore, the false twisting machine 100 of the present embodiment, as shown in Fig. 6, is arranged to be driven to rotate with the movement of the yarn Y on the downstream side of the false twisting device 104, while suppressing the yarn Y fed by the false twisting device 104. The twisting guide 107 that propagates toward the downstream side. Between the false twist device 104 and the fixed guide 107, there is no resistance to the yarn such as the guide, and the yarn Y falsely twisted by the false twist device 104 is directly wound around the fixed guide 107.

As shown in Figs. 7 and 8, the fixed guide 107 has two turntables 30 rotatably supported by the rotary shaft 31 via bearings 32 in the opposing state. A plurality of fins 33 having a radial shape are provided at equal intervals in the peripheral direction of the outer peripheral portion of the one side of each turntable 30 (the side facing the other turntable 30). The edge portion of each of the fins 33 has a shape that gradually inclines from the front end toward the base end, and a projection 34 that protrudes toward the other turntable 30 is formed at the base end portion of each of the fins 33.

The two turntables are connected by a plurality of bolts 35 in a state in which the fins 33 face each other. In this state, as shown in Fig. 9, the fins 33 of the two turntables 30 are alternately arranged in the circumferential direction of the turntable 30. In a state where the yarn Y is wound between the two turntables 30, the yarn Y is the edge portion 36 of the plurality of fins 33 along the two turntables 30, and moves in a staggered manner as viewed from the side direction. At this time, the yarn Y is in contact with the plurality of fins 33, and the propagation of the twisting is suppressed, and the yarn Y which has passed through the fixed guide 107 is in a non-twisted state.

As described above, by the fixed guide 107, the propagation of the twist of the yarn Y imparted to the yarn Y by the false twisting device 104 can be suppressed. Therefore, on the downstream side of the false twisting device 104, since the untwisting point of the yarn Y is fixed at the position of the fixed guide 107, the generation of hairiness can be suppressed.

Further, in order to more reliably suppress the propagation of the yarn Y, as shown in Fig. 6, the winding angle of the yarn guiding guide 107 must be a considerable amount. Therefore, in the present embodiment, the guide roller 108 that is driven to rotate in accordance with the movement of the yarn Y is provided on the downstream side of the false twisting device 104, and the yarn path on the downstream side of the false twisting device 104 is changed by the guide roller 108 to ensure The winding angle θ of the fixed guide 107 of the yarn Y is at a predetermined angle (for example, 45 degrees) or more. However, by the arrangement of the various guides on the downstream side of the false twisting device 104, the second yarn supplying roller 111, and the like, when the winding angle of the fixed guide 107 can be formed at a predetermined angle or more, the guide roller is not required. 108.

The stator guide 107 is not limited to having the configuration as shown in FIGS. 7 to 9 as long as it can be driven to rotate with the movement of the yarn Y, and the propagation of the yarn Y can be suppressed, and other than this. structure. The stator guide 107 can be made of steel, ceramics or the like, for example, and is not limited to these materials.

According to the false twist device 104 described above, since the two belts 12 are wound around the pair of pulleys 10, 11, the clamp length is increased. By the increase in the above clamp length, the crimping force (effective crimping force) actually acting on the yarn Y can be reduced, and the spun yarn can be processed. And because of the increase in the clamping length, the twisting torque acting on the yarn can be increased, and the processing range of the roving can be increased.

Further, the surface of each of the belts 12 is divided by the grooves 12a extending in the longitudinal direction of the belt, so that one yarn is divided into four times, and the yarn Y is dispersed in a plurality of places to form a certain turning angle. The spread of stable turnover.

Therefore, in particular, when a large number of yarns such as spun yarns or filaments are subjected to false twist processing, or when false twist processing is performed in a region where the K value is high, hairiness is likely to occur, and the present invention can be particularly improved. Its effect. Since the hair is easily generated when the air is blown from the interlacing nozzle 105 (see Fig. 1), it is particularly suitable for the above case.

In the case where the thick yarn is subjected to false twisting, as in the conventional clamp type false twisting device, the yarn can be clamped by a large contact pressure, and the twist is surely imparted. That is, according to the present invention, the advantage of the friction-twisting type is not impaired.

Next, a more specific embodiment of the present invention will be described together with a comparative example.

First, in the following Example 1 and Comparative Examples 1 to 3, a relatively fine multifilament system having 120 dtex and a number of filaments of 216 was used. With respect to the above yarns, the false twisting device of the specification shown in Table 1 was subjected to false twisting processing, and after the yarn bundled property was applied by the interlacing nozzle, the number of hairiness of the yarn was measured. And review the processing critical speed of false twist processing.

The first embodiment is a false twist processing example of the clamp type false twisting device according to the present invention, and the comparative examples 1 to 3 are the false twist processing examples after changing various conditions shown in Table 1 with respect to the first embodiment. In Table 1, the false twist device is the above-described clamp type false twist device with Nip, and on the other hand, Friction is a friction twist type false twist device.

The configuration of the friction-twisting false twist device in advance is briefly described as follows. As shown in Fig. 10, the false twisting device 304 includes three-axis spindles 300 each having a plurality of disk-shaped friction disks 301. The three-axis spindles 300 are disposed so as to be in contact with the yarns around the friction disk 301. The position is spirally (zigzag) positioned between the plurality of friction discs 301 that rotate simultaneously with the three-axis spindle 300, and the yarn Y is twisted while being in contact with the peripheral surfaces. The disc 310 positioned on the most downstream side is referred to as a guide disc, whereby a guide disc 310 determines the position at which the yarn Y is fed from the false twist device 304.

Referring back to Table 1, the number of belts is respectively shown in the clamp type false twisting device, the number of belts arranged in one pair of pulleys is arranged, the belt width is the width of one belt, and whether the presence or absence of the belt groove is formed on the surface of the belt. Groove (see Figure 2, Figure 3). In Example 1 and Comparative Examples 1 and 2 in which the clamp type false twisting device was used, the set air pressure of one of the belts toward the other belt side was set to 0.1 MPa (1.1 kg/cm ² ).

First, regarding the first embodiment and the comparative example 1 using the clamp type false twist device and the comparative example 3 using the friction twist type false twist device, the hairiness with respect to the K value (untwisting tension T2 / twisting tension T1) The relationship between the number (the number of hairiness of yarns of 2000 m in length) is shown in Fig. 11 as a graph. In particular, in the first embodiment using the caliper-type false twist device, the relationship between the number of hairiness relative to the K value and the comparative examples 1 and 2 are similarly shown in Fig. 12 .

As can be seen from Fig. 11 and Fig. 12, the belt having the groove on one pair of pulleys is wound in two rows, and the number of the belts is compared with that in the first embodiment in which the yarn is clamped four times. 2 comparison, can inhibit the production of hairiness. Further, in the first embodiment, the hairiness can be suppressed to the same extent as in the case of using the friction twisting type false twist device (Comparative Example 3).

Next, with respect to Example 1 and Comparative Examples 1 and 2 using a clamp-type false twist device and Comparative Example 3 using a friction stir-twisting false twist device, the relationship between the twisting tension T1 and the machining critical speed SS is graphically displayed. Figure 13. As can be seen from Fig. 13, even in the case of the thin filament, the first embodiment has a stable yaw angle as compared with the comparative example 1 or the comparative example 2 of the same tong type, so that the processing critical speed SS can be improved by about 50 to 100 m/min. And can be increased to the same extent as the friction-plus-comparative example.

In Example 4 and Comparative Example 4, the strength and elongation of the yarn were measured for 12 spindles, and the degree of uniformity of the standard deviation inspection was calculated. The results are shown in Table 3.

Example 4 was the same as Example 1 except that a multifilament multifilament of 83 dtex and a number of filaments of 144 was used. Comparative Example 4 was the same as Comparative Example 1 except that the same yarn as in Example 4 was used.

As can be seen from Table 3, in Example 4, the unevenness of the strength and elongation of the yarn was small as compared with Comparative Example 4.

Further, it was confirmed that the false twist device of the first embodiment can process a wide range of yarns from 20d to 600d. For example, even if a 20-day multifilament yarn having 24 filaments is applied for 18 hours by a false-twisting device of 12 spindles, yarn breakage does not occur, and abnormal tension does not occur.

Next, the clamp type false twisting device of the first embodiment is used, and the same as the case where the fixed guide shown in Fig. 6 is provided on the downstream side of the clamp type false twisting device.

Specifically, a multi-fiber multifilament yarn of 83 dtex and a number of filaments of 144 is used, and when a fixed guide is provided (Example 2) and when a fixed guide is not provided (Example 3), hairiness is performed. Determination of the number. Further, in addition to the stator guide, the second embodiment is provided with a guide roller (see Fig. 6), and the winding angle of the stator guide is 90 degrees. With respect to these Examples 2 and 3, the results of the measurement of hairiness are shown in Table 2.

As shown in Table 2, in the second embodiment in which the constant value is the same as the K value, in comparison with the third embodiment in which the guide member is not provided, the number of hairiness can be greatly reduced by The stator guide prevents the propagation of the sway and suppresses the generation of hairiness.

Further, by the experiment, the same effect as in the second embodiment can be obtained by the winding angle of the stator guide being 60 degrees. The effect of approaching Example 2 can also be obtained without a guide roller and a winding angle of 45 degrees.

As described above, as shown in Fig. 2, the clamp type false twist device configured by the belt clamp yarn arranged in a crosswise manner has been described with reference to the type of the present invention. However, the clamp type false twist device having another configuration can also be used. The invention is applied.

For example, in the above-described embodiment, the pair of yarn clamping members that clamp the yarn Y are annular belts, but may be provided on one side of the disc that is freely rotatable (the implementation of Fig. 14) example).

The caliper type false twisting device 204 shown in Fig. 14 is configured to simultaneously apply S 捻 rotation and Z 捻 rotation to the two yarns Y. That is, the false twist device 204 includes a disk 41 that is rotatably supported by the rotating shaft 40, and two sets of belt units 42 that are disposed to sandwich the disk 41. An annular portion 46 made of an elastic material (rubber or the like) is provided on both edge portions of the disk 41. Each of the belt units 42 includes a pair of pulleys 43 and 44, and a belt 45 that is wound around the pair of pulleys 43 and 44 and has elasticity and flexibility. The belt pulleys 43 and 44 are rotationally driven by a driving means such as a motor. The belt 45 moves along the periphery of the pulleys 43, 44. The belt 45 is pressed against the disk 41 by the air pressure.

When the belt 41 is driven between the disk 41 and the belt 45 of the two sets of belt units 42 in the direction in which the two yarns Y are respectively held, the annular portion 46 and the belt 45 on both sides of the disk 41 are driven. Between the two yarns Y, respectively, the reverse twist is applied. In other words, the yarn Y on one side of the disk 41 is rotated, and the yarn Y on the other side of the disk 41 is rotated.

Here, the disk 41 is concentrically arranged with two annular portions 46, and two belts 45 are wound around the pair of pulleys 43, 44 of the respective belt units 42. Two annular portions 46 and two belts 45 The contact state is the same as in Fig. 4. Therefore, similar to the clamp type false twisting device of Fig. 2, the effective contact pressure is smaller than the belt pushing pressure, and the clamping length is increased, and the yarn can be processed in the range from the spun yarn to the roving.

The contact surface of the yarn of each annular portion 46 forms a groove 46a in the circumferential direction thereof, and the contact surface of the yarn of each belt 45 forms a groove 45a extending toward the longitudinal direction thereof, the annular portion 46 and the belt 45. The surfaces are divided by the grooves 46a, 45a, respectively. Therefore, the number of times the yarn Y is clamped is increased more, and all the filaments constituting the filament can be equally imparted to the twist, suppressing the generation of hairiness.

According to the present embodiment, the S and Z non-torque yarn processing can be performed, and the double yarns processed on the left and right sides of the disk can be processed, so that the roving can be processed.

1A. . . Yarn supply department

1B. . . Processing department

1C. . . Winding section

10, 11. . . Pulley

12. . . Belt

12a. . . Trench

13. . . Drive shaft

15. . . Annular surface

20 (20A, 20B). . . Belt unit

30. . . Turntable

33. . . Wing

34. . . Projection

36. . . edge

40. . . Rotating shaft

41. . . disc

42. . . Belt unit

43, 44. . . Pulley

45. . . Belt

45a, 46a. . . Trench

46. . . Ring

100. . . Extended false twisting machine

101. . . Yarn package

102. . . 1 heater

103. . . Cooler

104. . . False device

105. . . Interlaced nozzle

106. . . 2 heaters

107. . . Fixed guide

108. . . Guide rollers

110. . . First yarn supply roller

111. . . Second supply roller

112. . . Third supply roller

201. . . Bobbin

202. . . Stud

204. . . False device

300. . . Spindle

301. . . Friction disc

304. . . False device

310. . . disc

T1. . . Twisting tension

T2. . . Unwinding tension

Y. . . yarn

Fig. 1 is a schematic configuration diagram of an extension false twisting machine according to an embodiment of the present invention.

Figure 2 is a perspective view of the false twist device.

Fig. 3 is a cross-sectional view showing the drive pulley in a state in which the belt is wound.

Fig. 4 is a schematic top view of the clamp type false twist device.

Figure 5 is a diagram illustrating the relationship between the K value (T2/T1) and the solution point.

Figure 6 is a layout view of the false twist device, the fixed guide, and the guide roller.

Figure 7 is a front view of the turntable of the fixed guide.

Figure 8 is a cross-sectional view of the stator guide.

Fig. 9 is a view showing a state of a yarn wound around a fixed guide.

Figure 10 is a front view of the friction twisting false twist device.

Fig. 11 is a graph showing the relationship between the number of hairiness relative to the K value in the first embodiment and the comparative example 1 using the clamp type false twisting device and the comparative example 3 using the friction twisting type false twisting device.

Fig. 12 is a graph showing the relationship between the number of hairs relative to the K value in Example 1 and Comparative Examples 1 and 2 using the clamp type false twist device.

Fig. 13 is a graph showing the relationship between the twisting tension T1 and the processing critical speed SS in Example 1 and Comparative Examples 1 to 3.

Fig. 14 is a perspective view showing a false twisting device according to a modification of the embodiment.

10, 11. . . Pulley

12. . . Belt

12a. . . Trench

13. . . Drive shaft

20 (20A, 20B). . . Belt unit

104. . . False device

Y. . . yarn

Claims (4)

A clamp type false twisting device comprising two yarn clamping units, wherein the two yarn clamping units are clamped into the yarn, and the yarn twisting device is provided to the yarn twisting device, wherein the yarn clamping unit is respectively And a plurality of yarn clamping members, and arranging and arranging the plurality of yarn clamping members, and further, the surfaces of the yarns of the yarn clamping members are respectively formed with grooves for dividing the yarn contacting surface, and the yarn clamping unit is Each of the pair of pulleys is a plurality of endless belts wound around a pair of pulleys, and a groove having a V-shaped cross section is formed in each of the endless belts, and the endless belts are disposed such that Crossing, constituting the intersecting portion of the yarn, and winding a plurality of the endless belts on the pair of pulleys, and the surface of the contact yarn of each of the endless belts is formed with a groove extending along the longitudinal direction of the belt. The contact surface of the yarn of the endless belt is divided by the above groove. The caliper-type false twisting device according to the first aspect of the invention, wherein the one pair of pulleys are arranged in a row and two of the endless belts are wound. The caliper-type false twisting device according to the first or second aspect of the invention, wherein the outer peripheral surface of each of the pulleys is formed with a plurality of annular curved surface portions that protrude outward in the axial direction. The clamp type false twisting device according to claim 1, wherein the yarn clamping member of one of the yarn clamping units is provided in a rotatable circle An annular portion on at least one side of the disk, and the yarn clamping member of the other side yarn clamping unit is wound around a pair of pulleys, and has flexibility and elasticity while being opposed to the one side surface of the disk An endless belt in which one of the annular portions is disposed concentrically with respect to the one side of the disc, and a plurality of the endless belts are arranged and wound around the pair of pulleys, and the yarns are contacted at the respective annular portions. The surface is formed with a groove in the circumferential direction thereof, and a groove extending in the longitudinal direction thereof is formed on the surface of the contact yarn of each endless belt.