JP2015025233A - Spun yarn drawing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spun yarn drawing apparatus that is capable of sufficiently preheating a yarn before being wound on a heating roller on an upstream side in a yarn running direction.SOLUTION: The spun yarn drawing apparatus includes: godet rollers 11-13; godet rollers 14, 15 having a roller surface temperature higher than that of the godet rollers 11-13; a thermal insulation box 16 having a first housing space 24a for housing the godet rollers 11-13 and a second housing space 24b for housing the godet rollers 14,15; and a preheating box 17 having a preheating space 35 in which a yarn Y before being wound on the godet roller 11 runs. In the preheating box 17, air supplied from the second housing space 24b is supplied to the yarn Y that runs in the preheating space 35 and the yarn Y is preheated before being wound on the godet roller 11.

Description

  The present invention relates to a spinning stretcher that stretches a yarn spun from a spinning device.

  Patent Document 1 discloses an apparatus for heating and stretching a plurality of yarns spun from a spinning device. This device comprises two roller units for drawing the yarn. Each roller unit includes a godet roller that is a heating roller, a separate roller, and a heat insulation box that accommodates these two rollers. In each roller unit, the yarn is wound a plurality of times between the godet roller and the separate roller, and the yarn is heated to a predetermined temperature by contact with the godet roller therebetween. Further, the godet roller of the roller unit located on the downstream side in the yarn traveling direction has a higher rotational speed (yarn feed speed) than the godet roller of the roller unit located on the upstream side. As a result, the yarn heated by the upstream roller unit is stretched by the rotational speed difference between the two roller units before reaching the downstream roller unit.

  By the way, when the yarn enters the heat retaining box of each roller unit, cold air outside the box flows along with the yarn. Further, when the yarn comes out from the heat insulation box, high-temperature air in the heat insulation box flows out along with the yarn. Therefore, the temperature of the air in the heat insulation box decreases and becomes unstable. Therefore, in Patent Document 1, in each heat retaining box, a communication space for communicating the yarn inlet and the yarn outlet is provided in addition to a space (heat retaining space) in which the godet roller and the separate roller are accommodated. With this configuration, not all of the high-temperature air (associated flow) that flows along with the yarn exiting from the yarn outlet in the communication space is exhausted to the outside from the yarn outlet, but a part of the high-temperature air is generated in the communication space. Returned to the vicinity of the entrance. That is, the temperature of the air in the communication space is increased, and exhaust heat is effectively used.

JP 2012-36526 A

  Although not described in detail in Patent Document 1, in a general spinning drawing process, the temperature at which the yarn can be drawn by the upstream godet roller (temperature slightly above the glass transition temperature of the polymer: for example, polyester) If there is, it is heated to about 80 ° C. The heated yarn is stretched between the upstream godet roller and the downstream godet roller. Further, the drawn yarn is heated at a temperature (for example, 120 to 150 ° C.) higher than that of the upstream godet roller in the downstream godet roller in order to heat-fix the drawn state.

  Here, in particular, in the upstream godet roller, it is difficult to heat the yarn to a predetermined temperature for the following reasons. First, the molten polymer spun from the spinning device is cooled by a cooling device and solidified to become a yarn. In other words, the yarn immediately before being heated by the upstream godet roller is at room temperature. Furthermore, an oil agent is usually applied to the cooled yarn, but since most of the components constituting the oil agent are water, the upstream godet roller heats the yarn containing a large amount of moisture. For these reasons, in the conventional configuration, in order to reliably increase the temperature of the yarn to the temperature at which the yarn can be stretched in the upstream godet roller, it is necessary to apply a large amount of thermal energy to the yarn. The heat loss due to heat dissipation of the heat was large. In this regard, in order to improve the heating efficiency of the yarn, the inventor of the present application first preheats the yarn before being wound around the upstream godet roller, and heats the yarn with a godet roller after raising the yarn temperature to some extent. I thought it was effective.

  In this regard, in Patent Document 1, in the heat retaining box of the upstream roller unit, part of the air in the heat retaining box is returned to the yarn inlet side (communication flow path). However, since the temperature of the godet roller of the upstream roller unit is considerably lower than that of the downstream roller unit, the temperature of the air in the heat retaining box is not so high (100 ° C. or less). Therefore, in such a configuration, the effect of preheating the yarn before being wound around the upstream godet roller is low.

  An object of the present invention is to provide a spinning and drawing apparatus that can sufficiently preheat a yarn before being wound around a heating roller located upstream in the yarn traveling direction.

Means for Solving the Problems and Effects of the Invention

A spinning and stretching device according to a first aspect of the present invention is a spinning and stretching device that stretches a yarn spun from a spinning device, and a first heating roller around which the yarn is wound, and a yarn sent from the first heating roller. A second heat roller that is wound and has a roller surface temperature higher than that of the first heat roller, a first heat retaining portion that has a first housing space in which the first heat roller is housed, and the second heat roller. A second heat retaining portion having a second housing space in which the heating roller is accommodated; a preheating space in which the yarn before being wound around the first heating roller travels; and the second heat retaining portion of the second heat retaining portion. A preheating part connected to the accommodation space,
In the preheating unit, air supplied from the second accommodation space is supplied to the yarn traveling in the preheating space, and the yarn is preheated before being wound around the first heating roller. It is what.

  According to the present invention, in the preheating portion, the second accommodation space that accommodates the second heating roller that is higher in temperature than the first heating roller with respect to the yarn that runs in the preheating space and is not wound around the first heating roller. Hot air from is supplied. The yarn traveling in the preheating space is sufficiently preheated by touching the hot air. As described above, since the plurality of yarns can be preheated to a sufficient temperature in the preheating portion by utilizing the heat of the high-temperature air in the second housing space, so-called exhaust heat, the overall heating efficiency of the spinning drawing apparatus is improved.

  The spinning and drawing apparatus according to a second aspect of the present invention is the spinning apparatus according to the first aspect, wherein the preheating unit is supplied with a preheating air supply pipe for supplying air in the second accommodation space to the preheating space, and air in the preheating space. A preheating exhaust pipe to be discharged is connected.

  According to the present invention, high-temperature air is supplied from the preheating air supply pipe to the preheating space of the preheating portion, and air in the preheating space is discharged from the preheating exhaust pipe. Accordingly, since the high-temperature air in the second housing space can be continuously supplied from the preheating air supply pipe into the preheating space, the yarn traveling in the preheating space can be sufficiently preheated.

  According to a third aspect of the present invention, there is provided the spinning drawing apparatus according to the second aspect, wherein a main exhaust pipe that exhausts air in the second accommodation space is connected to the second heat retaining section, and the preheated air supply pipe and the preheated pipe are exhausted. Both exhaust pipes are connected to the main exhaust pipe.

  In the present invention, a part of the high-temperature air flowing through the main exhaust pipe is supplied to the preheating unit from the main exhaust pipe that discharges the air in the second accommodation space via the preheating supply pipe. Further, the air discharged from the preheating space of the preheating part is returned to the main exhaust pipe via the preheating exhaust pipe. According to this, it is possible to supply air to the preheating part and exhaust from the preheating part by simply connecting the preheating air supply pipe and the preheating exhaust pipe to the main exhaust pipe for discharging the air in the second accommodation space. The structure of supply / exhaust becomes simple. In addition, the supply of air to the preheating unit and the exhaust from the preheating unit can be realized by simply changing the existing facility where the main exhaust pipe is already installed.

  According to a fourth aspect of the present invention, in the second or third aspect of the invention, the preheating air supply pipe is provided with a flow rate adjusting valve for adjusting the amount of air supplied to the preheating section. It is what.

  According to the present invention, the amount of high-temperature air supplied to the preheating unit can be adjusted by the flow rate adjustment valve provided in the preheating air supply pipe. For example, the air temperature in the preheating space can be maintained within an appropriate range by adjusting the air flow rate with a flow rate adjusting valve. In addition, if the flow rate of the supplied air is high, problems such as yarn swaying may occur with the yarn traveling in the preheating space. Etc. can be suppressed.

  According to a fifth aspect of the present invention, there is provided the spinning / drawing apparatus according to any one of the second to fourth aspects, wherein the preheating air supply pipe is provided with a filter.

  The air discharged from the second storage space may contain oil component applied to the yarn or dust such as yarn waste. In this invention, after removing said oil agent component, dust, etc. with the filter provided in the preheating air supply pipe, high temperature air is supplied to a preheating part. Therefore, the oil component, dust, and the like are prevented from adhering to the yarn traveling in the preheating space.

  According to a sixth aspect of the present invention, in the first or fifth aspect of the invention, the first storage space and the second storage space partitioned by the partition are formed in one heat retaining box. The one heat retaining box includes both the first heat retaining portion and the second heat retaining portion.

  In this invention, since both the 1st heating roller and the 2nd heating roller are accommodated in one heat retention box, a spinning drawing apparatus can be reduced in size.

It is a schematic block diagram of the spinning winder concerning this embodiment. It is a figure which shows a preheating box and its periphery structure. FIG. 3 is a diagram corresponding to FIG. FIG. 3 is a diagram corresponding to FIG. 2 in another modified form. It is a schematic block diagram of the spinning drawing apparatus of another modification.

  Next, an embodiment of the present invention will be described. FIG. 1 is a schematic configuration diagram of a spinning winder according to the present embodiment. As shown in FIG. 1, the spinning winder 1 includes a spinning drawing device 3 and a yarn winding device 4.

  The molten fiber material such as polyester continuously spun from the spinneret of the spinning device 2 is solidified by blowing cooling air in the cooling cylinder 5 to become a plurality of yarns Y. The spinning / drawing device 3 is disposed below the cooling cylinder 5 and draws a plurality of yarns Y sent downward from the cooling cylinder 5. The spinning drawing apparatus 3 includes an oil agent guide 10, five godet rollers 11 to 15, a heat retaining box 16, a preheating box 17, and the like.

  The oil agent guide 10 applies an oil agent to each of the plurality of yarns Y spun from the spinning device 2. The plurality of yarns Y to which the oil agent is applied by the oil agent guide 10 is preheated in a preheating box 17 described later, and then separated by a comb-like thread guide 18 and then five godet rollers 11 via guide rollers 19. Sent to ~ 15. In FIG. 1, the yarn guide 18 is installed downstream of the preheating box 17 in the yarn traveling direction. However, the yarn Y preheated in the preheating box 17 can be quickly fed into the heat retaining box 16. The yarn guide 18 may be installed upstream of the preheating box 17 in the yarn traveling direction so as to be able to do so.

  The five godet rollers 11 to 15 are accommodated in the heat retaining box 16. The heat retaining box 16 is a rectangular parallelepiped box formed of a heat insulating material. The heat retaining box 16 is formed with a yarn introduction port 16a for introducing a plurality of yarns Y into the heat retaining box 16, and a yarn outlet 16b for guiding the plurality of yarns Y from the heat retaining box 16 to the outside. ing. In addition, inside the heat insulation box 16, there are provided two partition walls 22 and 23 each formed of a heat insulating material, and the two partition walls 22 and 23 make the space in the heat insulation box 16 two upper and lower spaces 24a and 24b. It is divided into. Three godet rollers 11-13 are accommodated in the lower first accommodating space 24a, and two godet rollers 13, 14 are accommodated in the upper second accommodating space 24b.

  The plurality of yarns Y introduced into the heat retaining box 16 from the yarn introduction port 16a are wound around the five godet rollers 11 to 15 in order from the lower godet roller 11. The five godet rollers 11 to 15 are each driven to rotate by a motor (not shown). Each of the five godet rollers 11 to 15 is a heating roller having a heater 20 therein.

  The lower three godet rollers 11 to 13 (first heating roller of the present invention) heat the plurality of yarns Y up to a temperature at which they can be drawn (temperature slightly higher than the glass transition temperature: about 80 ° C. in the case of polyester fibers). The heating roller. The heating temperature (roller surface temperature) of the three godet rollers 11 to 13 is set to a first temperature equal to or higher than the glass transition temperature of the yarn Y (for example, 80 to 95 ° C. in the case of polyester fiber). On the other hand, the upper two godet rollers 14 and 15 (second heating roller of the present invention) are heating rollers for heat-fixing the stretched state of the plurality of yarns Y. The heating temperature (roller surface temperature) of the two godet rollers 14 and 15 is set to a second temperature (for example, 120 to 150 ° C.) higher than the first temperature of the lower three godet rollers 11 to 13. Further, the yarn feeding speeds of the upper two godet rollers 14 and 15 are higher than those of the lower three godet rollers 11 to 13. The control device 21 performs temperature control of the heater 20 (yarn heating control) and motor rotation control (yarn feed speed control) for each of the five godet rollers 11 to 15.

  The portion of the heat retaining box 16 that forms the lower first housing space 24a corresponds to the first heat retaining portion 25a of the present invention, and the portion that forms the upper second housing space 24b is the second heat retaining space of the present invention. It corresponds to the part 25b. Thus, since both the low-temperature godet rollers 11 to 13 and the high-temperature godet rollers 14 and 15 are accommodated in one heat insulation box 16, the spinning and drawing apparatus is compared with a structure in which each is accommodated in a separate heat insulation box. 3 can be reduced in size.

  The plurality of yarns Y introduced into the heat retaining box 16 are first heated to a temperature at which they can be stretched while being fed by the lower three godet rollers 11-13. Next, the plurality of preheated yarns Y are drawn by the yarn feed speed difference between the two godet rollers 13 and 14. Further, the plurality of yarns Y are heated to a higher temperature while being fed by the upper two godet rollers 14 and 15, and the stretched state is heat-set. The plurality of yarns Y drawn as described above are led out of the heat retaining box 16 from the yarn outlet port 16b and further fed to the yarn winding device 4 by the guide roller 26.

  The preheating box 17 (the preheating portion of the present invention) is arranged on the upstream side in the yarn traveling direction from the heat retaining box 16. The preheating box 17 preheats the yarn Y before being wound around the godet roller 11 in the heat retaining box 16. The configuration of the preheating box 17 will be described in detail later.

  The yarn winding device 4 is disposed below the spinning drawing device 3. The yarn winding device 4 includes a bobbin holder 27, a contact roller 28, and the like. The bobbin holder 27 has a long shape extending in the direction perpendicular to the plane of FIG. 1 and is driven to rotate by a motor (not shown). A plurality of bobbins 29 are mounted on the bobbin holder 27 along the axial direction. The yarn winding device 4 rotates a bobbin holder 27 to simultaneously wind a plurality of yarns Y around a plurality of bobbins 29 to form a plurality of winding packages 30. The contact roller 28 contacts the surface of the plurality of winding packages 30 and applies a predetermined contact pressure to adjust the shape of the winding package 30.

  Next, the preheating box 17 and its peripheral configuration will be described. FIG. 2 is a diagram showing a preheating box and its peripheral configuration.

  Prior to the description of the preheating box 17, the main exhaust pipe 31 that discharges high-temperature air in the heat retaining box 16, in particular, in the second accommodation space 24b will be described. In the 2nd storage space 24b, the one part component of the oil agent adhering to the thread | yarn Y volatilizes by the high temperature state in the 2nd storage space 24b, The volatile matter mixes with air, and oil smoke arises. Therefore, by discharging the air containing the oily smoke through the main exhaust pipe 31, the oily smoke is prevented from leaking into the room in which the spinning and drawing apparatus 3 is accommodated and filling the room. Furthermore, the indoor temperature is prevented from rising due to leakage of high-temperature air in the second accommodation space 24b.

  As shown in FIG. 2, a main exhaust pipe 31 communicating with the second housing space 24 b in which the two high-temperature godet rollers 14 and 15 are housed is formed on the side wall of the heat retaining box 16 constituting the second heat retaining portion 25 b. It is connected. The main exhaust pipe 31 extends upward from the heat retaining box 16. Thereby, the high-temperature air (for example, about 120 to 150 ° C.) in the second accommodation space 24 b is exhausted from the main exhaust pipe 31. The air in the second storage space 24b contains the oil component of the yarn Y applied by the oil guide 10. The air also contains dust such as lint. Therefore, a filter 32 for removing the above oil component and dust from the air discharged from the second accommodation space 24b to the main exhaust pipe 31 is provided at a connection portion between the heat retaining box 16 and the main exhaust pipe 31. Yes. As a result, dirt and clogging in the main exhaust pipe 31 due to oil agent components and dust in the air are suppressed. A valve 33 for closing the main exhaust pipe 31 or adjusting the flow resistance of the main exhaust pipe 31 is provided in the middle of the main exhaust pipe 31.

  As shown in FIG. 2, the preheating box 17 is a rectangular parallelepiped box formed of a heat insulating material. A yarn inlet 17a is formed in the upper wall portion of the preheating box 17, and a yarn outlet 17b is formed in the lower wall portion. The yarn Y travels up and down in the internal space of the preheating box 17 (hereinafter referred to as the preheating space 35) from the yarn inlet 17a toward the yarn outlet 17b.

  A preheating air supply pipe 36 is provided in a portion of the main exhaust pipe 31 below the valve 33 so as to branch from the main exhaust pipe 31, and this preheating air supply pipe 36 is one side of the preheating box 17 (left side in the figure). It is connected to the side wall part. A preheating exhaust pipe 37 is connected to the other side wall portion of the preheating box 17 (right side in the figure), and this preheating exhaust pipe 37 is connected to a portion of the main exhaust pipe 31 above the valve 33. . As a result, part of the high-temperature air discharged from the second storage space 24b is supplied from the main exhaust pipe 31 to the preheating space 35 of the preheating box 17 through the preheating air supply pipe 36, and further inside the preheating space 35. The yarn Y is preheated in contact with the yarn Y traveling on the. On the other hand, the air in the preheating space 35 is returned from the preheating exhaust pipe 37 to the main exhaust pipe 31 and discharged. In order to suppress the temperature drop of the air until it is supplied to the preheating box 17, the portion of the main exhaust pipe 31 from the heat retaining box 16 to the branch portion of the preheating air supply pipe 36 and the preheating air supply pipe 36 are made of a heat insulating material. It is preferable that it is covered with.

  The preheating air supply pipe 36 is provided with a flow rate adjusting valve 38 for adjusting the flow rate of air flowing through the preheating air supply pipe 36. A filter 39 is also provided at the connection between the preheating box 17 and the preheating air supply pipe 36. Similar to the filter 32 of the main exhaust pipe 31 described above, the filter 39 is for removing oil component and dust from the air flowing through the preheated air supply pipe 36. Further, a filter for capturing lint generated in the preheating box 17 may be provided between the preheating box 17 and the preheating exhaust pipe 37.

  Further, it is preferable that a temperature sensor 40 for detecting the temperature of the air supplied from the main exhaust pipe 31 to the preheating box 17 is installed. Although the temperature sensor 40 may be provided in the preheating air supply pipe 36 as shown in FIG. 2, it may be provided in the preheating box 17.

  In the above configuration, the preheating space 35 of the preheating box 17 has a high temperature via the main exhaust pipe 31 and the preheating air supply pipe 36 from the second housing space 24b that houses the godet rollers 14 and 15 of the heat retaining box 16. Air is supplied. Thereby, in the preheating space 35, by supplying high-temperature air from the side to the plurality of yarns Y traveling up and down, the plurality of yarns Y come into direct contact with the high-temperature air. The plurality of yarns Y are sufficiently preheated. As described above, since a plurality of normal temperature yarns Y can be preheated to a sufficient temperature in the preheating box 17 by utilizing the heat of high-temperature air discharged from the second storage space 24b, so-called exhaust heat, The overall heating efficiency of the device 3 is improved.

  The high-temperature air supplied from the preheating air supply pipe 36 passes through the preheating space 35 and is discharged from the preheating exhaust pipe 37. Accordingly, since the high-temperature air in the second accommodation space 24b can be continuously supplied into the preheating space 35, the yarn Y traveling in the preheating space 35 can be sufficiently preheated.

  Further, the preheating air supply pipe 36 branches from the main exhaust pipe 31 that discharges the air in the second accommodation space 24b, and a part of the high-temperature air flowing through the main exhaust pipe 31 is preheated through the preheating air supply pipe 36. Supplied to. Further, the air discharged from the preheating space 35 is returned to the main exhaust pipe 31 through the preheating exhaust pipe 37. That is, just by connecting the preheating air supply pipe 36 and the preheating exhaust pipe 37 to the main exhaust pipe 31 for discharging the air in the second accommodation space 24b, the air supply to the preheating box 17 and the exhaust from the preheating box 17 are performed. This makes it possible to simplify the supply / exhaust configuration. In addition, the preheating box 17 can be supplied with air and preheated by simply changing the equipment such as connecting the preheating air supply pipe 36 and the preheating exhaust pipe 37 to the existing equipment where the main exhaust pipe 31 is already installed. Exhaust from the box 17 can be realized.

  Since the flow rate adjusting valve 38 is provided in the preheating air supply pipe 36, the amount of hot air supplied to the preheating box 17 can be adjusted by the flow rate adjusting valve 38. For example, if the temperature of the air supplied from the preheating air supply pipe 36 is high and the supply amount is large, the temperature in the preheating space 35 becomes too high and the plurality of yarns Y are overheated to reach the glass transition temperature. There is also a risk of it. Therefore, the air temperature in the preheating space 35 can be maintained within an appropriate range by operating the flow rate adjustment valve 38 while confirming the temperature detected by the temperature sensor 40. In addition, if the flow rate of the supplied air is high, problems such as yarn swaying may occur with the yarn Y traveling in the preheating space 35. However, the yarn can be adjusted by adjusting the air amount with the flow rate adjusting valve 38. It is also possible to suppress shaking and the like.

  A filter 39 is provided in the preheating air supply pipe 36 (specifically, a connecting portion between the preheating air supply pipe 36 and the preheating box 17). Therefore, the filter 39 removes dust such as oil component and yarn waste from the high-temperature air from the second storage space 24b, and then the high-temperature air is supplied to the preheating box 17. Therefore, the oil agent component, dust, and the like are suppressed from adhering to the yarn Y traveling in the preheating space 35.

  The oil component contained in the air from the second storage space 24b is originally added to the yarn Y by the oil guide 10 and contained in the oil agent, and the oil component itself in the air is preheated. Even if the box 17 adheres directly to the yarn Y, it does not cause a big problem. However, the oil component contained in the air gradually accumulates on the inner surface of the preheating air supply pipe 36 and the preheating box 17 and becomes a lump, and when this peels off from the inner surface and adheres to the yarn Y, it causes a significant loss of yarn quality. . For this reason, it is meaningful to remove the oil component from the air supplied to the preheating box 17 by the filter 39.

  In addition, since a similar filter 32 is provided at the connection portion between the main exhaust pipe 31 and the heat insulation box 16, the amount of oil component and dust contained in the air flowing through the preheating air supply pipe 36 is reduced. However, in the present embodiment, the oil agent component and the like are reliably removed from the air supplied to the preheating box 17 by providing the preheating air supply pipe 36 with the filter 39. In addition, the main exhaust pipe includes a filter 39 of the preheated air supply pipe 36 so that the oil component, etc., which has been removed by the filter 32 of the main exhaust pipe 31 can be reliably captured by the filter 39 of the preheated air supply pipe 36. You may use a finer thing than the filter 32 of 31. FIG.

  Next, modified embodiments in which various modifications are made to the embodiment will be described. However, components having the same configuration as in the above embodiment are given the same reference numerals and description thereof is omitted as appropriate.

1] The flow rate adjustment by the flow rate adjustment valve 38 may be controlled by the control device 21. For example, based on the temperature detection signal of the temperature sensor 40, the opening degree of the flow rate adjustment valve 38 is controlled and supplied to the preheating box 17 so that the temperature in the preheating space 35 of the preheating box 17 is maintained at a predetermined temperature. The flow rate of the air to be adjusted may be adjusted.

  Further, the amount of heat energy to be given to the yarn in order to stretch the yarn varies depending on various production conditions such as the type and thickness of the yarn or the type of oil to be applied. For example, when a thick yarn is produced, the heat capacity of the yarn is large. Therefore, it is preferable to apply more heat to the yarn Y in the preheating box 17 than in the case of producing a thin yarn. Therefore, the control device 21 may adjust the flow rate of the air supplied to the preheating box 17 by controlling the flow rate adjustment valve 38 according to the production conditions.

2] In the above embodiment, the filter 39 is provided in the preheating air supply pipe 36. However, depending on the type of the yarn Y, the type of the oil agent, etc., the adhesion of the oil component or the like to the yarn Y in the preheating box 17 is a problem. In some cases, the oil agent does not easily adhere to the yarn Y. In such a case, the filter 39 may be omitted.

3] In the above-described embodiment, the main exhaust pipe 31 that exhausts the air in the second accommodation space 24 b is supplied with the preheated air supply pipe 36 that supplies air to the preheating box 17 and the preheated exhaust pipe 37 that exhausts air from the preheating box 17. And are connected. On the other hand, a supply / exhaust system for the preheating box 17 may be provided separately from the main exhaust pipe 31. For example, as shown in FIG. 3, the preheating air supply pipe 36 may be directly connected to the second accommodation space 24 b of the heat retaining box 16, and the preheating exhaust pipe 37 may not be connected to the main exhaust pipe 31.

4] In the above embodiment, the preheating box 17 as the preheating unit is provided separately from the heat insulation box 16, but the preheating unit may be integrated with the heat insulation box 16. For example, as shown in FIG. 4, the heat retaining box 16 may integrally include a preheating unit 50 on the side of the first heat retaining unit 25 a and the second heat retaining unit 25 b. The preheating space 51 of the preheating unit 50 communicates with the first accommodation space 24a and the second accommodation space 24b through the openings 16c and 16d, respectively. Thereby, the high temperature air in the second storage space 24b flows into the preheating space 51 from the opening 16d. The plurality of yarns Y introduced into the heat retaining box 16 first enters the preheating space 51 from the yarn introduction port 16a, and further enters the first accommodation space 24a through the opening 16c. At this time, in the preheating space 51, the plurality of yarns Y are preheated by the high-temperature air flowing from the second accommodation space 24b.

5] The configuration of the godet roller and the heat insulation box is not limited to the configuration of the above embodiment.

  For example, the spinning winding device 3 </ b> A shown in FIG. 5 includes a first godet roller 61 and a second godet roller 62. Both the first godet roller 61 and the second godet roller 62 are heating rollers having a heater 63 therein. The 1st godet roller 61 is accommodated in the 1st heat retention box 65 (1st heat retention part of this invention) with the 1st separate roller 64. FIG. The second godet roller 62 is housed in the second heat retaining box 67 (second heat retaining portion of the present invention) together with the second separate roller 66.

  An oil agent is first applied to the plurality of yarns Y spun from the spinning device 2 by the oil agent guide 10. Next, the plurality of yarns Y are wound a plurality of times between the first godet roller 61 set to the first temperature and the first separate roller 64 in the first heat retaining box 65 (first housing space 68). And heated to a temperature at which stretching is possible. The rotation speed (yarn feed speed) of the second godet roller 62 is faster than that of the first godet roller 61, and the plurality of yarns Y are stretched between the two godet rollers 61 and 62. Further, the plurality of yarns Y are disposed between the second godet roller 62 set at a second temperature higher than the first temperature and the second separate roller 66 in the second heat retaining box 67 (second housing space 69). Are wound several times and heated.

  Here, a preheating box 70 is provided upstream of the first godet roller 61 in the yarn traveling direction. The preheating box 70 is supplied with hot air in the second accommodation space 69 of the second heat retaining box 67. Accordingly, the plurality of yarns Y before being wound around the first godet roller 61 are preheated in the preheating box 70. In the embodiment of FIG. 5 as well, it is preferable that a flow rate adjusting valve 78 is provided between the second heat retaining box 67 and the preheating box 70 as in the embodiments of FIGS. The flow rate adjusting valve 78 can adjust the amount of hot air supplied from the second heat retaining box 67 to the preheating box 70.

  The present invention can also be applied to a so-called multi-stage spinning and drawing apparatus that includes three or more types of godet rollers having different heating temperatures and draws the yarn in multiple times. In this case, the yarn before being wound around the low temperature godet roller in the preheating portion is supplied by supplying the air in the housing space for accommodating the high temperature godet roller to the preheating portion installed on the inlet side of the lower temperature godet roller. Is preheated.

2 Spinning device 3, 3A Spinning and drawing device 11-13 Godet roller (first heating roller)
14,15 Godet roller (second heating roller)
16 Heat retaining box 17 Preheating box 22, 23 Partition 24a First housing space 24b Second housing space 25a First heat retaining portion 25b Second heat retaining portion 31 Main exhaust pipe 35 Preheating space 36 Preheating air supply pipe 37 Preheating exhaust pipe 38 Flow rate adjusting valve 39 Filter 50 Preheating section 51 Preheating space 61 First godet roller 62 Second godet roller 65 First heat retaining box 67 Second heat retaining box 68 First housing space 69 Second housing space 70 Preheating box 78 Flow rate adjusting valve

Claims (6)

A spinning and drawing device for drawing a yarn spun from a spinning device,
A first heating roller around which the yarn is wound;
A second heating roller around which the yarn sent from the first heating roller is wound and whose roller surface temperature is higher than that of the first heating roller;
A first heat retaining portion having a first accommodation space in which the first heating roller is accommodated;
A second heat retaining portion having a second accommodation space in which the second heating roller is accommodated;
A preheating portion that has a preheating space in which the yarn before being wound around the first heating roller travels, and is connected to the second accommodation space of the second heat retaining portion, and
In the preheating unit, air supplied from the second accommodation space is supplied to the yarn traveling in the preheating space, and the yarn is preheated before being wound around the first heating roller. Spinning and drawing device.   The preheating unit is connected to a preheating air supply pipe that supplies air in the second accommodation space to the preheating space and a preheating exhaust pipe that discharges air in the preheating space. Item 2. The spinning and drawing apparatus according to Item 1. A main exhaust pipe that discharges air in the second accommodation space is connected to the second heat retaining section,
The spinning / drawing apparatus according to claim 2, wherein the preheating air supply pipe and the preheating exhaust pipe are both connected to the main exhaust pipe.   The spinning / drawing device according to claim 2 or 3, wherein the preheating air supply pipe is provided with a flow rate adjusting valve for adjusting an amount of air supplied to the preheating portion.   The spinning / drawing apparatus according to any one of claims 2 to 4, wherein the preheating air supply pipe is provided with a filter. In one heat retaining box, the first storage space and the second storage space partitioned by a partition are formed,
The spinning / drawing apparatus according to any one of claims 1 to 5, wherein the one heat retaining box includes both the first heat retaining portion and the second heat retaining portion.

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