TWI599685B - Spun yarn drawing apparatus - Google Patents

Description

Spinning stretching device

The present invention relates to a spinning stretcher for stretching a spun yarn.

In Patent Document 1, the yarn spun from the spinning machine is wound around four yarn guide rolls. The four yarn guide rolls are heating rolls provided with heaters and have substantially the same diameter. Further, the speed of the yarn guide roller on the downstream side of the four yarn guide rollers is faster. Therefore, in the four yarn guide rollers of Patent Document 1, the surface speed of the yarn guide roller on the downstream side is higher, and the yarn wound on the four yarn guide rollers is heated and the rotation speed of the yarn guide roller is poor. It is stretched correspondingly.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2012-214941

Here, the stretching of the yarn in Patent Document 1 will be described in detail. In the case where the yarn is stretched by the surface speed difference between the two yarn guiding rolls, the yarn wound on the upstream side yarn guiding roller (hereinafter referred to as the upstream side roller), along with the yarn pair The entry point of the upstream side roller travels toward the detachment point where the yarn exits toward the downstream side guide roller (hereinafter referred to as the downstream side roller), and the tension gradually increases. Further, when the magnitude of the yarn tension reaches the position required to stretch the yarn (hereinafter referred to as the stretching point), the traveling speed sharply rises and the yarn is stretched.

The stretching point is centered on the axis of the upstream side roller at a position deviating from the point of separation. Here, the tension of the yarn at the stretching point is equal to the amount of force required to stretch the yarn. Further, the magnitude of the tension of the yarn at the stretching point is expressed by a function of the winding angle of the yarn to the upstream side roller, the friction coefficient between the upstream side roller and the yarn, and the like. Therefore, if the coefficient of friction between the surface of the upstream side roll and the yarn and the magnitude of the force required to stretch the yarn change, the above angle also changes. On the other hand, the coefficient of friction between the surface of the upstream side roller and the yarn varies depending on the smoothness of the surface of the upstream side roller, the shape of the yarn, and the type and amount of the oil to be imparted to the yarn. Further, the magnitude of the force required to stretch the yarn varies depending on the type and temperature of the yarn. For these reasons, the above-described angle at which the position of the stretching point is determined varies depending on the degree of smoothness of each portion of the upstream side roller surface, the inconsistent state of the oil agent to the yarn, and the inconsistent temperature of the yarn. At this time, when the diameter of the upstream side roller is large, the stretching point largely fluctuates with respect to the fluctuation of the above angle. When the stretching point of the yarn greatly changes, the elongation rate of the yarn fluctuates, and there is a fear that uneven dyeing may occur when the yarn is dyed.

Further, if the above angles are the same, the diameter of the upstream side roller is larger, and the length between the stretching point and the detachment point is longer. On the other hand, in the case where the stretching point is on the surface of the upstream side roller, the traveling speed of the yarn on the upstream side is substantially equal to the surface speed of the upstream side roller than the stretching point, but at the stretching point and the breaking point Between the stretched yarns, the yarn travels at a faster speed than the surface speed of the upstream side rollers. Therefore, the stretched yarn is rubbed between the stretching point and the break point at a speed different from the surface speed of the upstream side roller. Pass the upstream side roller. At this time, the larger the diameter of the upstream side roller, the longer the length between the stretching point and the detachment point of the upstream side roller surface, and the longer the length of the portion of the upstream side roller surface where the stretched yarn is rubbed. As a result, the yarn is liable to be fluffed.

On the other hand, in the case of stretching the yarn while heating, since it is necessary to sufficiently heat the yarn before stretching, it is necessary to lengthen the length of contact between the yarn and the yarn guide roller on the upstream side from the stretching point. To a certain extent.

The present invention is to provide a spinning machine which can sufficiently heat the yarn before stretching, and can minimize the variation of the stretching point of the yarn, and can shorten the length of the portion of the heated roll that has been stretched by the drawn yarn. Stretching device.

A spinning and drawing device according to a first aspect of the present invention is a spinning stretching device for stretching a yarn spun from a spinning device, and includes a plurality of heating rollers that convey the wound yarn; the plurality of heating rollers include a first heating roller, a second heating roller that sends the yarn from the first heating roller, and a third heating that sends the yarn from the second heating roller and has a surface speed faster than that of the second heating roller a roller; a diameter of the second heating roller is smaller than a diameter of the first heating roller.

The heated yarn is stretched by the difference in surface speed between the second heating roller and the third heating roller. The yarn wound around the second heating roller travels toward the detachment point from the entry point of the yarn from the first heating roller toward the third heating roller, and the tension gradually increases. And, the position at which the tension of the yarn reaches the force required to stretch the yarn (hereinafter referred to as stretching) Point), the walking speed rises sharply and the yarn is stretched.

The stretching point is at a position deviating from the point of departure from the axis of the second heating roller. Here, the tension of the yarn at the stretching point is equal to the amount of force required to stretch the yarn. Further, the magnitude of the tension of the yarn at the stretching point is expressed by a function of the winding angle of the yarn to the second heating roller, the friction coefficient between the second heating roller and the yarn, and the like. Therefore, if the coefficient of friction between the surface of the second heating roller and the yarn and the magnitude of the force required to stretch the yarn change, the angle also changes. On the other hand, the coefficient of friction between the surface of the second heating roller and the yarn changes depending on the smoothness of the surface of the second heating roller, the shape of the yarn, and the type and amount of the oil to be applied to the yarn. Further, the magnitude of the force required to stretch the yarn varies depending on the type and temperature of the yarn. For these reasons, the above-described angle at which the position of the stretching point is determined varies depending on the degree of smoothness of each portion of the surface of the second heating roller, the inconsistent state of adhesion of the oil agent to the yarn, and the inconsistent temperature of the yarn. At this time, when the diameter of the second heating roller is large, the stretching point largely fluctuates with respect to the fluctuation of the above angle. When the stretching point of the yarn greatly changes, the elongation rate of the yarn fluctuates, and there is a fear that uneven dyeing may occur when the yarn is dyed.

Further, when the angles are the same, the diameter of the second heating roller is larger, and the length between the stretching point and the detachment point of the surface of the second heating roller is longer. On the other hand, when the stretching point is located on the surface of the second heating roller, the traveling speed of the yarn on the upstream side is substantially equal to the surface speed of the second heating roller than the stretching point, but at the stretching point and Between the break points, the stretched yarn travels at a faster speed than the surface speed of the second heat roller. Therefore, being The stretched yarn is rubbed past the second heating roller at a speed different from the surface speed of the second heating roller between the stretching point and the detachment point. At this time, as the diameter of the second heating roller increases, the length between the stretching point of the surface of the second heating roller and the detachment point becomes longer, and the yarn is more likely to fluff.

On the other hand, in the case of stretching the yarn while heating, since it is necessary to sufficiently heat the yarn before stretching, it is necessary to lengthen the length of contact between the yarn and the yarn guide roller on the upstream side from the stretching point. To a certain extent.

According to the invention, since the diameter of the second heating roller is smaller than the diameter of the first heating roller, the variation range of the stretching point of the yarn can be minimized. Further, the length between the stretching point and the detachment point of the surface of the second heating roller (the length of the portion where the stretched yarn is rubbed) can be shortened as much as possible. Further, if the winding angle of the yarn to the heating roller is the same, the larger the diameter of the heating roller, the longer the length of the yarn wound on the heating roller. In the present invention, since the diameter of the first heating roller is larger than the diameter of the second heating roller, even if the diameter of the second heating roller is small, the length of the yarn wound on the first heating roller can be wound up. The total length of the length of the yarn on the second heating roller is lengthened to some extent. Thereby, the yarn can be sufficiently heated before stretching.

In the spinning and drawing device according to the first aspect of the invention, the temperature of the second heating roller is equal to or lower than the temperature of the first heating roller.

The lower the temperature of the yarn, the greater the force required to stretch the yarn. Therefore, the lower the temperature of the yarn wound on the second heating roller, the closer the stretching point of the yarn is to the above-described breakaway point. Here, if the stretching point of the yarn is separated from the detachment point, the length of the portion of the yarn that has been stretched as described above becomes changed. Long, the yarn is prone to fluff. In the present invention, since the temperature of the second heating roller is equal to or lower than the temperature of the first heating roller, the yarn can be sufficiently heated not only by the first heating roller having a larger diameter than the second heating roller but also by the first heating roller. The small second heating roller is maintained at a temperature above the glass transition temperature and as low as possible. Thereby, the stretching point of the yarn is brought close to the detachment point of the yarn, and the length of the portion of the second heating roller where the stretched yarn is rubbed is shortened. As a result, it is possible to suppress the occurrence of fuzzing on the yarn.

According to a third aspect of the invention, in the spinning and stretching device of the first or second aspect, the present invention further includes an incubator for accommodating the plurality of heating rollers; the internal space of the thermal insulation box is partitioned into a housing The space of the second heating roller and the space for accommodating other heating rollers.

When the temperature of the second heating roller is unstable, the temperature of the yarn wound on the second heating roller is also unstable, and the stretching point of the yarn easily fluctuates. In the present invention, since the internal space of the thermal insulation box is partitioned into a space for accommodating the second heating roller and a space for accommodating the other heating roller, the temperature of the second heating roller is less likely to fluctuate due to heat from the other heating roller, and the second can be made second. The temperature of the heating roller is stable.

According to the invention, since the diameter of the second heating roller is smaller than the diameter of the first heating roller, the variation range of the stretching point of the yarn can be minimized. Further, the length between the stretching point and the detachment point of the surface of the second heating roller (the length of the portion where the stretched yarn is rubbed) can be shortened as much as possible. Further, since the diameter of the first heating roller is larger than the diameter of the second heating roller, even the first 2 The diameter of the heating roller is small, and the total length of the yarn wound on the first heating roller and the length of the yarn wound on the second heating roller can be lengthened to some extent.

2‧‧‧Spinning device

3‧‧‧Spinning and stretching device

11~15‧‧‧Guide roller

16‧‧‧ incubator

21‧‧‧Internal space

21a~21c‧‧‧ Space

22‧‧‧Parts

1 is a schematic configuration view of a spinning and winding machine according to an embodiment of the present invention; FIG. 2 is an enlarged view of the spinning and drawing device of FIG. 1; and FIG. 3 is an enlarged view of a portion of the vicinity of the second heating roller of FIG. .

Preferred embodiments of the present invention will be described below. As shown in FIG. 1, the spinning winder 1 is provided with a spinning stretcher 3 and a yarn winding device 4.

The spinning and stretching device 3 is a device that stretches a plurality of yarns Y produced by continuously spinning a molten fiber material such as polyester from a spinning device 2 located above. The spinning stretcher 3 is provided with an oil guide 10 and five yarn guide rollers 11 to 15. The oil agent guide 10 is a member that imparts an oil agent to each of the plurality of yarns Y spun from the spinning device 2.

The five yarn guide rollers 11 to 15 are rotationally driven by motors (not shown). Further, each of the five yarn guiding rollers 11 to 15 has a heater inside. That is, the five yarn guide rolls 11 to 15 are yarn heating rolls that are heated while conveying the yarn. The five yarn guide rollers 11 to 15 are housed in a rectangular parallelepiped incubator 16. On the right side wall portion of the incubator 16, a yarn introduction port 16a for introducing a plurality of yarns Y into the incubator 16 and a plurality of yarns for forming the plurality of yarns are formed. Y is a yarn outlet 16b that is led out from the inside of the incubator 16 to the outside. In addition, the detailed structure of the incubator 16 will be described later.

The plurality of yarns Y to which the oil agent is applied to the oil guide 10 are guided from the yarn introduction port 16a into the heat preservation box 16 via the guide rolls 17. The plurality of yarns Y introduced into the incubator 16 are sequentially wound up on the five yarn guide rollers 11 to 15. The winding angle of the yarn to the five yarn guiding rollers 11 to 15 is respectively less than 270°. Further, in the present embodiment, the yarn guiding roller 12 corresponds to the first heating roller of the present invention, the yarn guiding roller 13 corresponds to the second heating roller of the present invention, and the yarn guiding roller 14 corresponds to the third heating roller of the present invention.

The three yarn guiding rollers 11 to 13 on the upstream side are heating rollers for preheating a plurality of yarns Y before stretching. The surface temperatures of the yarn guide rollers 11 to 13 are set to a temperature higher than the glass transition temperature of the yarn Y. Further, among the three yarn guide rollers 11 to 13, the surface temperature of one of the yarn guide rollers 13 on the downstream side is lower than the surface temperature of the two yarn guide rollers 11 and 12 on the upstream side. Specifically, for example, the yarn guide rolls 11 and 12 are set to about 80 to 110 ° C, and the yarn guide roller 13 is set to about 70 to 80 ° C. And the diameter of the yarn guide roller 13 D2 is smaller than the diameter of the yarn guide rollers 11, 12 D1 is small. Specifically, for example, the diameter of the yarn guiding rollers 11, 12 D1 is about 300 mm, and the diameter of the yarn guide roller 13 D2 is about 200~220mm.

On the other hand, the two yarn guide rollers 14 and 15 on the downstream side are heating rollers for heat-setting the plurality of yarns Y after being stretched. The surface temperatures of the yarn guide rollers 14 and 15 are set to a temperature higher than the surface temperature of the three yarn guide rollers 11 to 13 on the upstream side (for example, about 120 to 140 ° C). Further, the surface speeds of the two yarn guide rollers 14 and 15 on the downstream side are faster than the surface speeds of the three yarn guide rollers 11 to 13 on the upstream side. And the diameter of the yarn guiding rollers 14, 15 D3 is about 300mm.

The plurality of yarns Y introduced into the heat insulating box 16 from the yarn introduction port 16a are first preheated to a temperature at which stretching is possible, that is, glass transition, while being conveyed by the three yarn guiding rollers 11 to 13 on the upstream side. Temperature above temperature. Next, the pre-heated plurality of yarns Y are stretched by the surface speed difference between the yarn guiding roller 13 and the yarn guiding roller 14. The stretching for the yarn Y is explained in detail later. Further, the plurality of yarns Y are heated to a higher temperature during the conveyance by the two yarn guide rollers 14, 15 on the downstream side, and are heat-set in a stretched state. The plurality of yarns Y stretched as described above are led out from the yarn outlet 16b to the outside of the heat insulating box 16, and are conveyed to the yarn winding device 4 by the guide rolls 18.

The yarn winding device 4 is disposed below the spinning stretcher 3. This yarn winding device 4 includes a bobbin holder 30, a contact roller 31, and the like. The bobbin holder 30 has an elongated shape extending in the vertical direction of the paper surface of Fig. 1, and is rotationally driven by a motor (not shown). A plurality of bobbins 32 are arranged in the axial direction of the bobbin holder 30. The yarn winding device 4 simultaneously winds the plurality of yarns Y onto the plurality of bobbins 32 by rotating the bobbin holder 30 to form a plurality of wound packages 33. The contact roller 31 is brought into contact with the surface of the plurality of wound packages 33 to impart a predetermined contact pressure, thereby adjusting the shape of the wound package 33.

Next, the stretching of the yarn Y by the difference in surface speed between the yarn guiding roller 13 and the yarn guiding roller 14 will be described in detail. In the case where the yarn Y is stretched by the surface speed difference between the yarn guiding roller 13 and the yarn guiding roller 14, the yarn is wound on the yarn guiding roller 13 The yarn Y travels from the entry point P0 of the yarn Y fed by the yarn guide roller 12 toward the break point P1 which is separated from the yarn guide roller 14, and the tension gradually increases. Further, when the tension of the yarn Y reaches the stretching point P2 of the force required to stretch the yarn Y, the traveling speed sharply rises and the yarn Y is stretched.

The stretching point P2 will be described in more detail. It is well known that the tension Td of the yarn Y at any point P in the range from the stretching point P2 to the detachment point P1 on the surface of the yarn guiding roller 13 can be expressed as follows, assuming the surface speed of the yarn guiding roller 13 and the yarn guiding roller 14. The tension generated in the yarn Y is T1, the angle of the above-mentioned point P centering on the axis of the yarn guiding roller 13 with respect to the detachment point P1 is θ, the coefficient of friction between the surface of the yarn guiding roller 13 and the yarn Y The mass per unit length of μ and the yarn is m, and the traveling speed of the yarn is v. Further, mv ^{2 of the} following formula is called centrifugal tension and is a tension generated by the centrifugal force of the yarn.

[Formula 1] Td = e - ^μθ . (T1-mv ² )+mv ²

Further, the position corresponding to the angle θ at which the tension Td of the yarn Y on the surface of the yarn guiding roller 13 is equal to the force F required to stretch the yarn Y becomes the stretching point P2.

However, in actuality, the degree of smoothness of each portion of the surface of the yarn guiding roller 13 is inconsistent, the adhesion state of the oil agent to the yarn Y due to the uneven adhesion of the oil agent to the yarn Y is inconsistent, and the friction coefficient μ is deviated. The magnitude of the tension Td of the yarn Y at the point P is also varied. Further, due to the influence of the temperature difference of each portion of the yarn Y, the magnitude of the force F required to stretch the yarn Y may vary. For these reasons, the angle θ when the tension Td is equal to the force F required to stretch the yarn Y, that is, the position of the stretching point P2 fluctuates. At this time, if the amount of change in the angle θ is Δθ when the tension Td is equal to the force F required to stretch the yarn Y, the amount of change ΔL of the stretching point P2 in the circumferential direction of the yarn guiding roller 13 is: Δ L=( D2/2). Δθ. That is, the diameter of the yarn guide roller 13 The larger the D2 is, the larger the fluctuation amount ΔL of the stretching point P2 with respect to the fluctuation amount Δθ of the angle θ.

When the amount of change ΔL of the stretching point P2 is increased, a large variation occurs in the elongation ratio of the yarn Y stretched between the yarn guiding roller 13 and the yarn guiding roller 14. If a large variation occurs in the elongation ratio of the yarn Y, there is a fear that uneven dyeing occurs when the yarn Y after stretching is dyed.

On the other hand, in the present embodiment, the diameter of the yarn guiding roller 13 is as described above. D2 is smaller than the diameter of the yarn guide rollers 11, 12 D1 is smaller. Therefore, for example, the diameter of the yarn guide roller 13 is made D2 and diameter of the yarn guide rollers 11, 12 When the D1 is equal to the same level, the fluctuation amount ΔL of the stretching point P2 with respect to the fluctuation amount Δθ of the angle θ becomes smaller. Thereby, the fluctuation amount ΔL of the stretching point P2 is small, and the inconsistency in the elongation ratio of the yarn Y can be suppressed.

Further, if the above angles θ are the same, the diameter of the yarn guiding roller 13 The larger D2, the longer the length between the stretching point P2 and the detachment point P1. On the other hand, in the case where the separation point P1 is located on the surface of the yarn guiding roller 13, although the traveling speed of the yarn Y on the upstream side is substantially equal to the surface speed of the yarn guiding roller 13 than the stretching point P2, the pulling speed is pulled. Between the extension point P2 and the break point P1, the stretched yarn Y travels at a faster speed than the surface speed of the yarn guide roller 13. Therefore, the stretched yarn Y is passed between the stretching point P2 and the break point P1, and the yarn guide roller 13 is rubbed by traveling at a speed different from the surface speed of the yarn guide roller 13. At this time, the larger the diameter of the yarn guiding roller 13, the longer the length between the stretching point P2 of the surface of the yarn guiding roller 13 and the detachment point P1, that is, the stretched yarn Y on the surface of the yarn guiding roller 13, The length of the part is longer. As a result, the stretched yarn Y is liable to be fluffed.

On the other hand, the diameter of the yarn guiding roller 13 in the present embodiment D2 is smaller than the diameter of the yarn guide roller 12 D1 is small. Therefore, for example, the diameter of the yarn guide roller 13 is made D2 and diameter of the yarn guide rollers 11, 12 The length of the portion between the stretching point P2 of the surface of the yarn guiding roller 13 and the breaking point P1 (the length of the portion rubbed against the stretched yarn Y) is shortened as compared with the case where D1 is equal. Thereby, the yarn Y is less likely to be fluffed.

On the other hand, in order to stretch the yarn Y, it is necessary to sufficiently heat the yarn Y before stretching. Here, the length of the yarn Y wound around the yarn guiding rollers 11 to 13 is larger as the diameter of the yarn guiding rollers 11 to 13 is larger as the winding angle is the same. In this regard, the diameter of the yarn guiding rollers 11, 12 in this embodiment D1 is larger than the diameter of the yarn guide roller 13 D2 is big. Therefore, in the present embodiment, the diameter of the yarn guiding rollers 11, 12 is made the same as the diameter of the yarn guiding roller 13. In the case of D2, the total length of the length of the yarn Y wound around the yarn guiding rolls 11, 12 and the length of the yarn Y wound around the yarn guiding roller 13 can be increased. Thereby, the yarn Y can be sufficiently heated before stretching.

Further, the higher the temperature of the yarn Y wound on the yarn guiding roller 13, the smaller the force F required to stretch the yarn Y. Therefore, the higher the temperature of the yarn Y wound on the yarn guiding roller 13, the smaller the tension required for stretching, and the further the stretching point P2 is away from the point P1 (the angle θ when the tension Td is equal to the above-mentioned force F) Bigger). If the stretching point P2 is far from the point of departure P1, the length of the portion of the surface of the yarn guiding roller 13 that has been rubbed against the stretched yarn Y becomes long. Knot As a result, the yarn Y is prone to fluff.

In the present embodiment, since the surface temperature of the yarn guide roller 13 is equal to or lower than the surface temperature of the yarn guide rollers 11 and 12 as described above, the yarn can be sufficiently heated not only on the yarn guide rollers 11 and 12 but also on the godet roller 13 The temperature is kept as low as possible within the range in which the yarn Y can be drawn, that is, above the glass transition temperature. Thereby, even in the case of producing a high-strength yarn which requires a high draw ratio, the stretched point P2 can be brought close to the break point P1. As a result, the length of the portion of the surface of the yarn guiding roller 13 that has been rubbed against the stretched yarn Y becomes short, and fluffing is less likely to occur on the yarn Y.

Next, the incubator 16 accommodating the yarn guiding rollers 11 to 15 will be described. The heat insulating box 16 is formed in a substantially rectangular parallelepiped shape, and an internal space 21 for accommodating the yarn guiding rollers 11 to 15 is formed inside. A partition member 22 is provided in the internal space 21. The partition member 22 partitions the internal space 21 into a space 21a in which the yarn guiding rollers 11, 12 are housed, a space 21b in which the yarn guiding roller 13 is housed, and a space 21c in which the yarn guiding rollers 14, 15 are housed. Thereby, in the present embodiment, the space 21b in which the yarn guiding roller 13 is accommodated is separated from the spaces 21a and 21c in which the other yarn guiding rollers 11, 12, 14, and 15 are accommodated.

Further, a slit 22a is formed in a portion of the partition member 22 for partitioning the space 21a and the space 21b. Further, a slit 22b is formed in a portion of the partition member 22 for partitioning the space 21b and the space 21c.

The yarn Y guided by the guide roller 17 is introduced into the space 21a from the yarn introduction port 16a, and sequentially wound onto the yarn guide rollers 11, 12. Further, the yarn Y conveyed from the yarn guiding roller 12 toward the yarn guiding roller 13 is fed into the space 21b from the space 21a through the slit 22a, and is wound around the yarn guiding roller 13. And, from the guide yarn The yarn Y conveyed by the roller 13 toward the yarn guiding roller 14 is fed into the space 21c from the space 21b through the slit 22b, and sequentially wound onto the yarn guiding rollers 14, 15. Then, the yarn Y fed from the yarn guiding roller 15 is led out from the space 21c to the outside of the heat insulating box 16 through the yarn guiding port 16b.

If the surface temperature of the yarn guiding roller 13 is unstable, the temperature of the yarn Y wound on the yarn guiding roller 13 also becomes unstable, and the stretching point P2 is likely to fluctuate. On the other hand, in the present embodiment, the space 21b in which the yarn guiding roller 13 is housed in the heat insulating box 16 is partitioned by the partition member 22 from the space 21a in which the yarn guiding rollers 11 and 12 are accommodated, and the space 21c in which the yarn guiding rollers 14 and 15 are accommodated. Thereby, the surface temperature of the yarn guiding roller 13 is not easily affected by the heat from the yarn guiding rollers 11, 12, 14, and 15, and the surface temperature of the yarn guiding roller 13 can be stabilized.

Next, a modification in which various modifications are applied to the embodiment will be described.

In the above embodiment, the space 21a in which the yarn guiding rollers 11 and 12 are accommodated in the heat insulating box 16, the space 21b in which the yarn guiding roller 13 is accommodated, and the space 21c in which the yarn guiding rollers 14 and 15 are accommodated are separated from each other, but the invention is not limited thereto.

For example, the space 21a and the space 21c may not be separated. Even in this case, since the space 21b accommodating the yarn guiding roller 13 is separated from the space accommodating the yarn guiding rollers 11, 12, 14, 15, the yarn guiding roller 13 is not easily received by the yarn guiding rollers 11, 12, 14, 15 heat effects.

Further, the space 21b for accommodating the yarn guiding roller 13 and the space for accommodating the yarn guiding rollers 11, 12, 14, and 15 are not limited. For example, all of the five yarn guiding rollers 11 to 15 may be housed in one space that is not separated from each other.

Further, although the surface temperature of the yarn guiding roller 13 in the above embodiment is not more than the surface temperature of the yarn guiding roller 12, the surface temperature of the yarn guiding roller 13 may be higher than the surface temperature of the yarn guiding roller 12. In this case, the stretching point P2 is farther from the point of departure P1 than in the case of the above embodiment, and the length of the portion of the surface of the yarn guiding roller 13 that has been rubbed against the stretched yarn Y becomes long. However, even in this case, due to the diameter of the yarn guide roller 13 D2 is smaller than the diameter of the yarn guide rollers 11, 12 D1 is small, and thus, for example, the diameter of the yarn guide roller 13 is made D2 and diameter of the yarn guide rollers 11, 12 When D1 is equal to the same degree, the length of the portion of the surface of the yarn guide roller 13 that rubs against the stretched yarn Y becomes shorter.

Further, although the number of the yarn guiding rollers in the above embodiment is five, it is not limited thereto. The number of the yarn guide rollers may be three or four, and six or more may be used.

11, 12, 13, 14, 15‧‧ ‧ yarn guide rollers

16‧‧‧ incubator

16a‧‧‧Yarn introduction

16b‧‧‧Yarn export

21‧‧‧Internal space

21a, 21b, 21c‧‧‧ space

22‧‧‧Parts

22a, 22b‧‧‧ gap

Y‧‧‧Yarn

Claims (3)

A spinning stretching device for stretching a yarn spun from a spinning device, comprising: a plurality of heating rollers for conveying the wound yarn; the plurality of heating rollers comprising: first a heating roller, a second heating roller that sends the yarn from the first heating roller, and a third heating roller that sends the yarn from the second heating roller and has a surface speed higher than that of the second heating roller; The diameter of the second heating roller is smaller than the diameter of the first heating roller. The spinning stretching apparatus according to the first aspect of the invention, wherein the temperature of the second heating roller is equal to or lower than a temperature of the first heating roller. The spinning stretcher according to the first or second aspect of the invention, further comprising: a heat insulating box that accommodates the plurality of heating rolls; wherein an inner space of the heat insulating box is partitioned into a space for accommodating the second heating roll, And space to accommodate other heating rollers.