JP5656503B2 - Yarn heating device - Google Patents

Description

  The present invention relates to a yarn heating device for heating a yarn.

  Patent Document 1 describes that a plurality of yarns spun from a spinning machine are wound in a winder (winding machine) after being stretched while being heated in two roller portions. More specifically, the plurality of yarns spun from the spinning machine are wound a plurality of times between the godet roller and the separate roller in each roller portion, and while being fed a plurality of times between these rollers. Heated by a godet roller. And the heated yarn is extended | stretched between the two godet rollers which respectively comprise two roller parts.

  In addition, the godet roller and separate roller of each roller part are housed in the internal space (thermal insulation space) of the box (thermal insulation box) so that the heat generated by the heater of the godet roller does not easily escape from the internal space. It has become. In addition, two slits are formed on the outer wall of the box, and the yarn passes through one of the slits (yarn inlet) and enters the internal space, and the other slit (yarn outlet) passes through the slit. Go out of the box through the internal space.

JP 2001-262429 A

  Here, generally, when the yarn travels, an air flow (associated flow) is generated around the yarn. Therefore, when the yarn enters the internal space through the slit, cold air outside the box flows into the internal space through the slit. When the yarn exits from the internal space through the slit, warm air in the internal space flows out of the box through the slit. Then, when cold air flows into the internal space or warm air flows out from the internal space, the temperature of the internal space decreases, so the heater necessary for heating the yarn to an appropriate temperature Power consumption increases.

  In particular, when the number of running yarns is large or when the running speed of the yarn is high, the accompanying flow increases, the amount of cold air that flows into the internal space, and the warm air that flows out of the internal space Since the amount of the above increases, the above-described problem becomes remarkable.

  The objective of this invention is providing the yarn heating apparatus which can reduce the power consumption of the heater for heating the yarn sent by the yarn feeding roller.

A yarn heating device according to a first aspect of the present invention includes a yarn feeding roller that feeds a yarn, a heater that heats the yarn fed by the yarn feeding roller, the yarn feeding roller, and the heater. A heat insulation box, and the heat insulation box is formed in a heat insulation space in which the yarn feeding roller and the heater are arranged, and a yarn entrance for inserting a yarn into the heat insulation space. And a yarn outlet formed on the wall for discharging the yarn from the heat insulation space, and disposed on the opposite side of the heat insulation space across the wall, and the wall is partitioned from the heat insulation space by the wall. And a guide space for guiding air from the yarn outlet side to the yarn inlet side is provided in the communication space. and said that you are.

According to the present invention, the cold air that has flowed into the heat insulation box from the outside flows into the communication space, and then only a part thereof flows into the heat insulation space through the yarn inlet, so that it is difficult to flow into the heat insulation space. Furthermore, since a part of the warm air that has flowed out of the heat insulation space through the yarn outlet returns to the heat insulation space through the communication space and the yarn inlet, it is difficult to flow out of the heat insulation box. Thereby, the temperature fall of the heat insulation space by an accompanying flow can be suppressed, and the power consumption of a heater can be reduced.
Further, according to the present invention, the air that has flowed out of the heat insulation space through the yarn outlet is guided by the guide in the communication space, flows toward the yarn inlet, and easily returns to the heat insulation space. Therefore, it is possible to greatly suppress the temperature drop of the heat insulation space due to the accompanying flow.

  A yarn heating device according to a second invention is the yarn heating device according to the first invention, wherein the communication space is formed with two yarn passages corresponding respectively to the yarn inlet and the yarn outlet. It is characterized by being partitioned into a plurality of regions by a partition wall.

  According to the present invention, by the partition wall that partitions the communication space into a plurality of regions, the cold air flowing into the communication space from the outside of the heat insulation box flows into the heat insulation space, and the warm air heat insulation box flowing out from the heat insulation space into the communication space Outflow to the outside is hindered. Therefore, it is possible to more effectively suppress the temperature drop of the heat retaining space due to the accompanying flow.

The yarn heating device according to a third aspect of the invention is characterized in that, in the yarn heating device according to the first or second invention, the height of the communication space becomes higher as it approaches the yarn inlet. To do.

  According to the present invention, since the height of the communication space becomes higher as it approaches the yarn inlet, the warm air that has flowed out of the heat insulation space through the yarn outlet is higher than the yarn inlet side in the communication space. It becomes easier to return to the heat insulation space. Therefore, it is possible to greatly suppress the temperature drop of the heat insulation space due to the accompanying flow.

The yarn heating device according to a fourth aspect of the present invention is the yarn heating device according to any one of the first to third aspects of the invention, in which the wind flows from the yarn outlet side toward the yarn inlet side in the communication space. Is provided.

  According to the present invention, warm air that has flowed out of the heat insulation space through the yarn outlet is easily sent to the yarn inlet side by the blower in the communication space and returned to the heat insulation space. Therefore, it is possible to greatly suppress the temperature drop of the heat insulation space due to the accompanying flow.

A yarn heating device according to a fifth invention is the yarn heating device according to any one of the first to fourth inventions, wherein the yarn feeding roller is a heating roller provided with the heater. To do.

  According to the present invention, even when the yarn feeding roller is a heating roller provided with a heater, a part of the warm air flowing out from the heat retaining device through the yarn outlet passes through the communication space and the yarn inlet. Therefore, it is possible to suppress the temperature drop of the heat insulation space due to the accompanying flow.

A yarn heating device according to a sixth invention is the yarn heating device according to any one of the first to fifth inventions, wherein the yarn feed roller is a roller for extending the yarn. To do.

  According to the present invention, even when the yarn feeding roller is a roller for extending the yarn, a part of the warm air flowing out from the heat insulation space through the yarn outlet passes through the communication space and the yarn inlet. Since it returns to the heat insulation space, the temperature fall of the heat insulation space by an accompanying flow can be suppressed.

  According to the present invention, since the cold air that has flowed into the heat insulation box from the outside flows into the communication space, only a part of the cold air flows into the heat insulation space through the yarn inlet, and thus it is difficult to flow into the heat insulation space. . Furthermore, since a part of the warm air that has flowed out of the heat insulation space through the yarn outlet returns to the heat insulation space through the communication space and the yarn inlet, it is difficult to flow out of the heat insulation box. Thereby, the temperature fall of the heat insulation space by an accompanying flow can be suppressed, and the power consumption of a heater can be reduced.

1 is a schematic configuration diagram of a yarn manufacturing apparatus according to an embodiment of the present invention. It is a perspective view of the roller unit of FIG. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. FIG. 10 is a diagram corresponding to FIG. FIG. 6 is a diagram corresponding to FIG. FIG. 10 is a diagram corresponding to FIG. FIG. 10 is a diagram corresponding to FIG. FIG. 10 is a diagram corresponding to FIG. FIG. 10 is a diagram corresponding to FIG.

  Hereinafter, preferred embodiments of the present invention will be described.

  As shown in FIG. 1, the yarn manufacturing apparatus 1 includes a spinning machine 2, two roller units 3, 4 (yarn heating device), and a winder 5. The spinning machine 2 spins a plurality of (for example, about 24 to 32) yarns Y in a state of being arranged in a direction perpendicular to the paper surface of FIG. The roller units 3 and 4 extend a plurality of yarns Y spun from the spinning machine 2 while heating. The winder 5 winds the plurality of yarns Y drawn by the roller units 3 and 4 onto a bobbin (not shown).

  Of the above-described configuration of the yarn manufacturing apparatus 1, the configurations of the spinning machine 2 and the winder 5 are the same as those in the related art, and thus detailed description thereof will be omitted. To do.

  The roller unit 3 is disposed below the spinning machine 2 as shown in FIG. 1, and as shown in FIGS. 1 to 4, the godet roller 11, the separation roller 12, and a heat insulating box for housing these. 13.

  The heat insulation box 13 is a substantially rectangular parallelepiped box made of a heat insulating material, and a heat insulation space 21 and a communication space 22 are formed therein. Further, the heat retaining box 13 is provided with a door 13a at one end in the arrangement direction of the yarn Y. When the door 13a is closed, the heat retaining space 21 and the communication space 22 are closed, and the door 13a is opened. The heat insulation space 21 and the communication space 22 are exposed.

  A godet roller 11 and a separate roller 12 are disposed in the heat retaining space 21. The godet roller 11 is a roller that is disposed on the side opposite to the door 13 a of the heat retaining box 13 and is cantilevered by a frame (not shown). A plurality of yarns Y spun from the spinning machine 2 are taken up by the godet roller 11. It is done.

  The separate roller 12 is disposed above the godet roller 11 and is cantilevered by a frame (not shown) disposed on the side opposite to the door 13 a of the heat retaining box 13, similar to the godet roller 11. The plurality of yarns Y taken up by the godet roller 11 are wound around the godet roller 11 and the separate roller 12 a plurality of times, and are sent to the roller unit 4 after being sent between these rollers 11 and 12 a plurality of times. . In the present embodiment, the godet roller 11 and the separate roller 12 correspond to the yarn feed roller according to the present invention.

  The godet roller 11 and the separation roller 12 are each a heating roller provided with a heater 15 inside, and the yarn Y is heated while being fed between the godet roller 11 and the separation roller 12. And since the godet roller 11 and the separate roller 12 are arrange | positioned in the heat insulation space 21, it is prevented that the heat generated by the heater 15 escapes from the heat insulation space 21 to the outside. Here, in this embodiment, since the godet roller 11 and the separation roller 12 are heating rollers incorporating a heater 15, the configuration of the apparatus is simplified.

  The communication space 22 is a space formed above the heat insulation space 21 of the heat insulation box 13, and the heat insulation space 21 and the communication space 22 are partitioned by a wall 23. In the wall 23, two slits 24a and 24b extending substantially parallel to the arrangement direction of the yarns Y are formed on both sides of the rollers 11 and 12.

  The slit 24a extends over almost the entire length of the communication space 22 in order to insert the yarn Y from the front surface (see FIG. 4), and the end on the door 13a side is open, and the end opposite to the opening A portion 24a1 forming the portion serves as a yarn inlet according to the present invention for putting the yarn Y into the heat retaining space 21. The slit 24b is a yarn outlet according to the present invention for taking out the yarn Y from the heat insulation space 21, and the end on the door 13a side is open like the slit 24a, but is longer than the slit 24a. Is getting shorter.

  In addition, on the upper wall 13c of the heat insulating box 13 forming the ceiling surface of the communication space 22, a slit 25a and a slit 24b having substantially the same shape as the slit 24a are respectively provided in the vicinity of the portions facing the slits 24a and 24b. A slit 25b having substantially the same shape is formed. Similarly to the slits 24a and 24b, the slits 25a and 25b are also open at the end on the door 13a side (see FIGS. 2 and 3).

  The openings of the slits 24a, 24b, 25a, 25b are closed by the door 13a when the door 13a is closed.

  Here, in this embodiment, the door 13a is opened and the godet roller 11 and the separate roller 12 are threaded. At this time, it is necessary to pass the yarn Y through the slits 24a, 24b, 25a, and 25b. However, in the present embodiment, as described above, the slits 24a, 24b, 25a, and 25b each have an opening on the door 13a side. , 24b, 25a, 25b.

  In addition, a guide wall 26 is provided inside the communication space 22 so as to extend from the vicinity of the opening side end of the slit 24b toward the portion near the portion 24a1 (yarn entrance) of the slit 24a.

  Further, a filter 27 is provided on the side wall 13 b of the heat insulating box 13 that forms the side wall surface opposite to the door 13 a of the communication space 22, and the communication space 22 is connected to the heat insulating box 13 via the filter 27. It is connected to a duct 9 provided outside. The duct 9 is connected to a blower (not shown). Generally, an oil containing water is applied to the yarn Y, and when the yarn Y is heated, oily smoke is generated. For this reason, in the present embodiment, the blower is operated to suck the air in the communication flow path 22 from the duct 9, and the oil contained in the air is captured by the filter 27. Thereby, the working environment is kept clean.

  The roller unit 4 has the same structure as the roller unit 3. In the following, in order to make it easy to understand which of the roller units 3 and 4 is described, the roller unit 3 includes, for example, a godet roller 11 ′ and a separate roller 12 ′. The description will be made with the reference numerals attached to the components of FIG.

  As shown in FIG. 1, the roller unit 4 is positioned upside down from the roller unit 3, that is, with the communication space 22 'positioned below the heat retaining space 21'. Further, the slit 25 b ′ of its own is disposed so as to face the slit 25 b of the roller unit 3.

  In the roller unit 4 arranged in this way, contrary to the roller unit 3, the slit 24b ′ corresponds to the yarn inlet according to the present invention, and forms an end opposite to the opening of the slit 24a ′. The portion 24a1 'that corresponds to the yarn exit according to the present invention.

  In the yarn manufacturing apparatus 1 having the above-described configuration, a plurality of yarns Y spun from the spinning machine 2 are first taken up by the godet roller 11 of the roller unit 3. At this time, the yarn Y enters the communication space 22 through the end opposite to the opening of the slit 25a, and further enters the heat retaining space 21 through the portion 24a1 (yarn inlet) of the slit 24a.

  The yarn Y taken up by the godet roller 11 is sent a plurality of times between the godet roller 11 and the separate roller 12 and then sent from the godet roller 11 to the godet roller 11 ′ of the roller unit 4. At this time, the yarn Y enters the communication space 22 through the slit 24b (yarn outlet) (out of the heat insulating space 21), and further passes through the slit 25b to the outside of the heat insulating box 13, and then the slit Y 25b 'enters the communication space 22', and further passes through the slit 24b '(yarn entrance) and enters the heat insulation space 21'.

  Further, the yarn Y taken up by the godet roller 11 ′ is sent a plurality of times between the godet roller 11 ′ and the separate roller 12 ′ and then sent from the godet roller 11 ′ to the winder 5. At this time, the yarn Y passes through the portion 24a1 ′ (yarn outlet) of the slit 24a ′ and enters the communication space 22 ′ (out of the heat retaining space 21 ′), and further, on the side opposite to the opening of the slit 25a ′. After passing through the end and out of the heat insulation box 13 ′, it is sent to the winder 5.

  Thereby, the yarn Y travels from the spinning machine 2 toward the winder 5 at a speed of, for example, about 4000 to 6000 m / min. At this time, the yarn Y is heated while being fed between the godet roller 11 and the separation roller 12 and between the godet roller 11 'and the separation roller 12'. Further, the godet roller 11 ′ of the roller unit 4 has a higher rotational speed than the godet roller 11 of the roller unit 3, and the heated yarn Y is rotated between the godet roller 11 and the godet roller 11 ′. The film is stretched with a force corresponding to the difference.

  Here, generally, when the yarn Y travels, an air flow (associated flow) is generated around the yarn Y. Therefore, in the roller unit 3, if there is no communication space 22 and slits 25a and 25b in the heat insulation box 13, the yarn Y outside the heat insulation box 13 enters the heat insulation space 21 directly through the slit 24a. At this time, cold air outside the heat insulation box 13 flows into the heat insulation space 21 through the slit 24a due to the accompanying flow.

  Furthermore, the yarn Y in the heat insulation space 21 passes directly from the heat insulation space 21 to the outside of the heat insulation box 13 through the slit 24b. At this time, the warm air in the heat insulation space 21 is caused to flow into the slit 24b by the accompanying flow. It flows out of the heat insulating box 13 from the heat insulating space 21 through the heat insulating space 21.

  Then, the flow of cold air into the heat insulation space 21 and the flow of warm air from the heat insulation space 21 as described above tend to lower the temperature in the heat insulation space 21, and as a result, the yarn Y is kept at an appropriate temperature. This increases the power consumption of the heater required to heat the heater.

  Further, in the present embodiment, the number of yarns Y is large (for example, about 24 to 32), and the traveling speed of the yarn Y is also somewhat fast (for example, about 4000 to 6000 m / min), so the accompanying flow is large. The amount of cold air flowing from the outside of the heat insulation box 13 and the amount of warm air flowing out from the heat insulation space 21 are also large. Therefore, if there is no communication space 22 and slits 25a and 25b, the temperature in the heat retaining space 21 is particularly likely to decrease, and the power consumption of the heater 15 necessary for heating the yarn Y to an appropriate temperature is particularly high. It will be big.

  On the other hand, in this embodiment, since the communication space 22 is formed in the heat insulation box 13, only a part of the cold air that has flowed into the communication space 22 from the outside of the heat insulation box 13 through the slit 25a. Flows into the heat insulation space 21 through the slits 24 a, and thus hardly flows into the heat insulation space 21. Further, a part of the warm air that has flowed out of the heat insulating space 21 through the slit 24b does not flow out of the heat insulating box 13 through the slit 25b, but passes through the communication space 22 and the slit 24a. Therefore, it is difficult to flow out of the heat insulation box 13. Therefore, the temperature drop inside the heat insulation space 21 due to the accompanying flow can be suppressed, and the power consumption of the heater 15 can be reduced.

  Further, in the present embodiment, since the guide wall 26 is provided in the communication space 22, the warm air that has flowed from the heat retaining space 21 to the communication space 22 through the slit 24 b passes along the guide wall 26 to the slit 24 a. However, it is difficult for the guide wall 26 to flow to other portions of the slit 24a. In other words, the air that has flowed out of the heat retaining space 21 through the slit 24 b is guided in the communication space 22 from the yarn outlet side to the yarn inlet side by the guide wall 26.

  Further, since an accompanying flow that flows from the communication space 22 toward the heat retaining space 21 is generated in the vicinity of the portion 24a1 of the slit 24a that is the yarn entrance, the flow has flowed to the vicinity of the portion 24a1 of the slit 24a in the communication space 22. The air flows along the accompanying flow into the heat insulation space 21.

  Therefore, the air that has flowed out from the heat insulation space 21 to the communication space 22 through the slit 24b sufficiently returns to the heat insulation space 21, and the temperature drop inside the heat insulation space 21 due to the accompanying flow can be greatly suppressed.

  Similarly to the above, in the roller unit 4, if the heat insulation box 13 ′ does not have the communication space 22 ′ and the slits 25 a ′ and 25 b ′, the flow of cold air into the heat insulation space 21 ′ and the heat insulation space 21. As a result of warm air flowing out from ', the power consumption of the heater 15' required to heat the yarn Y to an appropriate temperature increases.

  However, in the present embodiment, as described above, since the communication space 22 ′ is provided in the heat insulation box 13 ′, the warm air flowing out from the heat insulation space 21 ′ through the slit 24a ′ (part 24a1 ′). A part of returns to the heat insulation space 21 'through the communication space 22' and the slit 24b '. Therefore, the temperature drop inside the heat retaining space 21 'due to the accompanying flow can be suppressed, and the power consumption of the heater 15' can be reduced.

  Furthermore, since warm air that has flowed out of the slit 24a ′ (part 24a1 ′) is guided toward the slit 24b ′ by the guide wall 26 ′, the warm air easily returns to the heat insulation space 21 ′ through the slit 24b ′. It is possible to greatly suppress the temperature drop inside the heat insulation space 21 ′ due to the flow.

  Next, modified examples in which various changes are made to the present embodiment will be described. However, components having the same configuration as in the present embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate. In the following, an example in which the configuration of the roller unit 3 is changed will be described, but the same change can be made to the configuration of the roller unit 4.

  The configuration of the communication space that allows the slit 24a (part 24a1) and the slit 24b to communicate with each other is not limited to that of the above-described embodiment. For example, in one modified example (modified example 1), as shown in FIG. 5, the communication space 31 has a higher height toward the slit 24a side (left side in the figure, yarn inlet side), Correspondingly, the bottom surface 31a and the ceiling surface 31b of the communication space 31 are inclined surfaces that are inclined with respect to the horizontal direction so that the portion closer to the slit 24a is positioned higher.

  In this case, the warm air that has flowed out from the heat insulation space 21 to the communication space 31 through the slit 24b flows to the slit 24a side (part 24a1 side) of the communication space 31 having a high height and returns to the heat insulation space 21. Cheap. Therefore, it is possible to greatly suppress the temperature drop inside the heat retaining space 21 due to the accompanying flow.

  In this case, in addition to the guide wall 26, the bottom surface 31a and the ceiling surface 31b of the communication space 31 also guide the air in the communication space 31 from the slit 24b side toward the portion 24a1 side of the slit 24a. It has become.

  In Modification 1, the bottom surface 31a and the ceiling surface 31b of the communication space 31 are inclined surfaces. However, the present invention is not limited to this. For example, the bottom surface 31a and the ceiling surface 31b of the communication space 31 have a step. It may be a surface.

  In another modified example (Modified Example 2), as shown in FIG. 6, in addition to the configuration of the above-described embodiment, the guide wall 26 is opposed to and extends substantially parallel to the guide wall 26. A guide wall 41 is provided, and the portion 24 a 1 and the slit 24 b of the slit 24 a are located between the guide wall 26 and the guide wall 41. As a result, only the portion between the guide wall 26 and the guide wall 41 in the space located above the heat retaining space 21 is the communication space 42. In this case, the filter 27 is provided on the guide wall 41, and a part of the duct 9 enters the inside of the heat insulating box 13.

  In this case, since warm air that has flowed out from the heat retaining space 21 to the communication space 22 through the slit 24b is guided toward the portion 24a1 of the slit 24a by the guide wall 41 in addition to the guide wall 26, It becomes easy to return to the heat insulation space 21. In this case, since the volume of the communication space 42 is smaller than the volume of the communication space 22 in the above-described embodiment, the temperature of the air that has flowed out of the heat retaining space 21 through the slit 24b is It does not easily decrease in the communication space 42 and does not significantly decrease until the temperature of the air that has flowed out of the heat retaining space 21 returns to the heat retaining space 21. Therefore, it is possible to greatly suppress the temperature drop inside the heat retaining space 21 due to the accompanying flow.

  Furthermore, in another modified example (modified example 3), as shown in FIG. 7, in addition to the configuration of modified example 2, in the communication space 42, the wind is directed from the slit 24b side toward the portion 24a1 side of the slit 24a. A fan 51 (blower) is provided. In this case, since warm air that has flowed out of the heat retaining space 21 through the slit 24b is sent toward the portion 24a1 of the slit 24a by the fan 51 in the communication space 22, it is easy to return to the heat retaining space 21. Therefore, the temperature drop inside the heat retaining space 21 due to the accompanying flow can be further suppressed.

  In Modification 3, the fan 51 is provided in the communication space 42 of Modification 2, but the fan may be provided in the communication space 22 of the above-described embodiment.

  In another modification (Modification 4), as shown in FIG. 8, the communication space 56 has a height higher than that of the communication space 22 (see FIG. 3). It is divided into two upper and lower regions, that is, an upper region 56a and a lower region 56b. In the partition wall 57, slits 58a and 58b (yarn passages) are formed in the vicinity of the portion facing the slits 24a and 25a and in the vicinity of the portion facing the slits 24b and 25b, respectively.

  In this case, only a part of the cold air that has flowed into the communication space 56 (upper region 56a) through the slit 25a from the outside of the heat insulation box 13 flows into the lower region 56b through the slit 58a. Only a part flows into the heat insulating space 21 through the slit 24a. In other words, the partition wall 57 that partitions the upper region 56a and the lower region 56b of the communication space 56 prevents the cold air that has flowed into the communication space 56 from the outside of the heat insulation box 13 from flowing into the heat insulation space 21. Therefore, it is difficult for the cold air outside the heat insulation box 13 to flow into the heat insulation space 21.

  Furthermore, only a part of the warm air that has flowed out from the heat retaining space 21 to the communication space 56 (lower region 56b) through the slit 24b flows out to the upper region 56a through the slit 58b, and only a part of the warm air flows into the slit 56b. It flows out of the heat insulation box 13 from 25b. In other words, the partition wall 57 that partitions the upper region 56a and the lower region 56b of the communication space 56 prevents the warm air that has flowed out of the heat insulating space 21 through the slit 24b from flowing out of the heat insulating box 13. The air that has not flowed out of the heat insulation box 13 flows through the upper region 56a and the lower region 56 and returns to the heat insulation space 21 from the slit 24a. Therefore, the warm air in the heat insulation space 21 is difficult to flow out of the heat insulation box 13.

  From the above, it is possible to efficiently suppress the temperature drop of the heat retaining space 21 due to the accompanying flow. In the modified example 4, the communication space 56 is divided into two regions of the upper region 56a and the lower region 56b by the partition wall 57. However, the present invention is not limited to this, and there is a slit in which the communication space serves as a yarn passage. You may partition into the 3 or more area | region by the formed partition.

  In the above-described embodiment, the guide wall 26 is provided in the communication space 22, but the guide wall 26 may not be provided. Even in this case, since the slit 24a and the slit 24b communicate with each other through the communication space 22, the warm air flowing out from the heat insulation space 21 through the slit 24b returns to the heat insulation space 21 through the communication space 22 and the slit 24a. .

  In the above-described embodiment, both the godet roller 11 and the separation roller 12 are heating rollers provided with the heater 15. For example, only the godet roller 11 is a heating roller. Only one of them may be a heating roller.

  Furthermore, neither the godet roller 11 nor the separation roller 12 is a heating roller, and a separate heater may be provided. For example, in another modified example (modified example 5), as shown in FIG. 9, three rollers 61 to 63 (yarn feeding rollers) not provided with a heater are arranged in the heat retaining space 21. Heaters 64 and 65 are provided between the roller 61 and the roller 62 and between the roller 62 and the roller 63 so as to face the yarn Y fed between these rollers, respectively.

  Even in this case, similarly to the above-described embodiment, the warm air that has flowed out of the heat retaining space 21 through the slit 24b returns to the heat retaining space 21 through the communication space 22 and the portion 24a1 of the slit 24a. Therefore, the temperature drop in the heat insulation space 21 due to the accompanying flow can be suppressed, and the power consumption of the heaters 64 and 65 can be reduced.

  Moreover, in the above example, although the communication space was arrange | positioned only above the thermal insulation space 21, it is not restricted to this. In another modification (Modification 6), as shown in FIG. 10, the communication space 71 extends continuously from above the heat insulation space 21 to the right side in the drawing. Further, instead of the slit 24b (see FIG. 9), a slit 24c (yarn outlet) is formed on the side wall 73 of the heat insulation space 21 that is a partition from the communication space 72, and instead of the slit 25b (see FIG. 9). In addition, a slit 25 c is formed in a portion facing the slit 24 c of the side wall 13 d of the heat insulating box 13 facing the side wall 73.

  In addition, the rollers 61 to 63 and the heaters 64 and 65 are disposed in the heat retaining space 21 as in the fifth modification, but the positional relationship between the slit 24a and the slit 24c is the position between the slit 24a and the slit 24b. These positions are also different from the case of the modification 5 in accordance with the difference from the relationship. Specifically, the positions of the rollers 61 to 63 and the heaters 64 and 65 are arranged at positions shifted in the clockwise direction in FIG.

  Even in this case, as described above, since warm air that has flowed out to the communication space 71 through the slit 24c returns to the heat insulation space 21 from the slit 24a, the temperature drop in the heat insulation space 21 is suppressed, and the heaters 64, 65 Power consumption can be reduced.

  Further, in this case, the slit 24c is located at a position lower than the slit 24a, and the warm air that has flowed out to the communication space 71 through the slit 24c starts from the portion in the vicinity of the slit 24c and is located at a position higher than the slit 24a. Since it tends to flow toward the vicinity, the air that has flowed into the communication space 71 can be efficiently returned to the heat insulation space 21.

  In the above-described embodiment, the example in which the present invention is applied to a roller unit including a godet roller and a separate roller for stretching the yarn while heating is described. The present invention is applied to a yarn feeding roller for feeding, a heater for heating the yarn fed by the yarn feeding roller, and another yarn heating device provided with a heat retaining box in which the yarn feeding roller and the heater are accommodated. It is also possible to do.

3, 4 Roller unit 11, 11 'Godet roller 12, 12' Separate roller 13, 13 'Heat insulation box 15, 15' Heater 21, 21 'Heat insulation space 22, 22' Communication space 24a, 24a 'Slit 24b, 24b' Slit 24c Slit 26, 26 'Guide wall 31 Communication space 31a Bottom surface 31b Ceiling surface 41 Guide wall 42 Communication space 51 Fan 56 Communication space 56a Upper region 56b Lower region 57 Bulkhead 58a, 58b Slit 61-63 Roller 64, 65 Heater 71 Communication space

Claims (6)

A yarn feed roller for feeding the yarn,
A heater for heating the yarn fed by the yarn feeding roller;
A heat insulation box containing the yarn feed roller and the heater;
The insulation box is
A heat insulation space in which the yarn feed roller and the heater are disposed;
A yarn entrance formed on the wall of the heat insulation space, for entering a yarn into the heat insulation space;
A yarn outlet formed on the wall for taking out the yarn from the heat retaining space;
A communication space that is partitioned from the heat insulation space by the wall and that communicates the yarn inlet and the yarn outlet ;
The yarn heating device, wherein a guide for guiding air from the yarn outlet side toward the yarn inlet side is provided in the communication space .   2. The yarn according to claim 1, wherein the communication space is divided into a plurality of regions by partition walls in which two yarn passages respectively corresponding to the yarn inlet and the yarn outlet are formed. Heating device. The yarn heating device according to claim 1 or 2 , wherein a height of the communication space is higher as it approaches the yarn entrance. The yarn heating device according to any one of claims 1 to 3 , wherein an air blower that sends air from the yarn outlet side toward the yarn inlet side is provided in the communication space. The yarn heating device according to any one of claims 1 to 4 , wherein the yarn feeding roller is a heating roller including the heater. The yarn heating device according to any one of claims 1 to 5 , wherein the yarn feeding roller is a roller for extending the yarn.

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