JP2016216882A - Yarn heater - Google Patents

Abstract

An accompanying flow that flows along a traveling direction of a yarn from a yarn introduction port of a heat retaining box toward a yarn discharge port is suppressed from being amplified in a roller, and high-temperature air is discharged from the yarn discharge port. To minimize the loss of heat energy.
A heating and drawing section includes a heat retaining box having a yarn introduction port and a yarn outlet, and five godet rollers each serving as a yarn heating roller. The yarn Y introduced into the heat insulation box 16 from the yarn introduction port 16a is wound around each of the five godet rollers 11a to 11e at a winding angle of less than 270 degrees. Each of the five godet rollers 11 a to 11 e is provided with a current blocking plate 30 that extends from the outside of the roller 11 toward the yarn separation position P <b> 1 on the outer peripheral surface of the roller 11.
[Selection] Figure 2

Description

  The present invention relates to a yarn heating device that heats a yarn.

  Patent Document 1 discloses an apparatus that performs drawing and heat treatment of a yarn spun from a spinning apparatus. This apparatus has five godet rollers, each of which is a yarn heating roller, and a heat insulation box that houses these five godet rollers.

  In the heat insulation box, there are formed a slit (yarn introduction port) for introducing the yarn from the spinning device into the heat insulation box and a slit (yarn outlet port) for drawing out the yarn that has been stretched and heat-treated in the heat insulation box. Yes. The yarn introduced into the heat insulation box from the yarn introduction port is wound around each of the five godet rollers in the heat insulation box at a winding angle of less than 270 degrees (also referred to as “single hook”). The yarn introduced from the yarn introduction port is sequentially fed by each of the five godet rollers, is subjected to the following processing, and is led out from the yarn outlet port.

  Of the five godet rollers, the heating temperature of the two rollers on the downstream side (yarn outlet port side) is higher than the three rollers on the upstream side (yarn introduction port side) in the yarn traveling direction. Further, the yarn feeding speed of the two downstream rollers is higher than that of the three upstream rollers. The yarn introduced into the heat insulation box from the yarn introduction port is first preheated to a predetermined glass transition temperature by the three upstream rollers. Next, the preheated yarn is stretched by the difference in yarn feed speed between the upstream and downstream rollers. The drawn yarn is heated to a higher temperature by two rollers on the downstream side, the drawn state is heat-fixed, and then drawn out from the yarn outlet.

JP 2014-173212 A

  In the apparatus of Patent Document 1, the yarn introduced into the heat insulation box from the yarn introduction port is led out of the heat insulation box from the yarn outlet port while being heated by the five godet rollers. Here, in the vicinity of the outer peripheral surface of each roller, accompanying air is generated by the surrounding air flowing in the circumferential direction as the roller rotates. Further, the accompanying flow generated in a certain roller flows to the next roller along the traveling yarn, and the speed of the accompanying flow is amplified by the rotation of the next roller. That is, the yarns are sequentially fed by the five rollers, so that the speed of the accompanying flow of the yarns increases toward the yarn outlet (see FIG. 3 described in the embodiment). As a result, a large amount of high-temperature air is discharged to the outside from the yarn outlet, and the loss of heat energy is considerably large.

  The object of the present invention is to suppress the accompanying flow that flows along the traveling direction of the yarn from the yarn introduction port of the heat retaining box toward the yarn discharge port, and is prevented from being amplified in the roller, and high-temperature air is generated from the yarn discharge port. The purpose is to minimize the heat energy loss caused by the discharge.

Means for Solving the Problems and Effects of the Invention

  A yarn heating device according to a first aspect of the present invention includes a heat insulation box having a yarn introduction port for introducing a yarn and a yarn outlet port for extracting the yarn, and each of the yarn heating devices are housed in the heat insulation box, and the yarn A yarn heating roller that heats the yarn, and a plurality of rollers that send the yarn from the yarn introduction port to the yarn outlet port, and the yarn introduced into the heat insulation box from the yarn introduction port, Each of the plurality of rollers is wound at a winding angle of less than 270 degrees, provided to at least one of the rollers, and from the outside of the roller, a yarn winding region on the outer peripheral surface of the roller Of these, it is further provided with the 1st flow-shielding part extended toward the part of the yarn running direction downstream.

  In the present invention, the yarn is wound around each of the plurality of rollers accommodated in the heat insulation box at a winding angle of less than 270 degrees, and the yarns are sequentially fed by the plurality of rollers. In this configuration, the accompanying flow generated by the rotation of a certain roller flows to the next roller as the yarn travels, and the flow velocity can be amplified by the rotation of the next roller.

  Therefore, in the present invention, first, a first current shielding portion extending toward the outer peripheral surface of the roller is provided for at least one of the plurality of rollers accommodated in the heat insulation box. In addition, amplification of the accompanying flow that flows along the traveling direction of the yarn occurs in a portion of each roller around which the yarn is wound. Therefore, in the present invention, the first current shielding portion extends from the outside of the roller toward the downstream portion in the yarn traveling direction in the yarn winding region on the outer peripheral surface of the roller. As a result, in the region where the accompanying flow is amplified by the rotation of the roller, the accompanying flow is blocked by the first flow blocking portion, so that the accompanying flow having a high velocity flows from the roller to the downstream side in the running direction of the yarn. Can be suppressed. Therefore, the speed of the accompanying flow toward the yarn outlet can be reduced, and the heat energy loss can be suppressed.

  In the yarn heating device according to a second invention, in the first invention, the first current blocking portion is a yarn in which the yarn is separated from the roller in the winding region of the outer peripheral surface of the roller. It extends toward the portion between the separation position and the position that is 60 degrees back from the yarn separation position upstream in the yarn traveling direction.

  In order to reliably suppress the accompanying flow amplified by the rotation of the roller from flowing downstream from the roller in the yarn traveling direction, it is preferable to block the accompanying flow at a position as downstream as possible in the roller winding region. . In the present invention, the first current shielding portion extends toward a portion between the yarn separation position and the position that goes back 60 degrees upstream of the winding area of the outer peripheral surface of the roller. Yes. Therefore, it is possible to more surely suppress the accompanying flow having a high velocity from the roller to the downstream side in the yarn traveling direction.

  In the yarn heating device according to a third aspect of the present invention, in the first or second aspect, the first current blocking portion extends toward the yarn separation position in the winding region of the outer peripheral surface of the roller. It is characterized by that.

  In the present invention, the first current shielding portion extends toward the yarn separation position (that is, the final point of the yarn winding section). As a result, at the position where amplification of the accompanying flow is completed by the rotation of the roller, the accompanying flow is blocked by the first flow blocking portion, so that the accompanying flow having a high velocity flows downstream from the roller in the traveling direction of the yarn. Can be surely prevented.

  In the yarn heating apparatus according to a fourth aspect of the present invention, in any one of the first to third aspects, the first current blocking portion is located at least on the most downstream side in the yarn traveling direction among the plurality of rollers. , Provided on the last roller.

  The yarn fed from the final roller is led out of the heat insulation box through the yarn outlet. That is, if the accompanying flow in the final roller flows downstream as it is, the heat energy loss increases. Therefore, in the present invention, in order to prevent the accompanying flow having a high velocity from flowing from the final roller to the downstream side, at least the first current blocking portion is provided in the final roller.

  According to a fifth aspect of the present invention, there is provided the yarn heating device according to the fourth aspect, wherein the first current blocking portion includes the final roller and at least one roller positioned upstream of the final roller in the yarn traveling direction. Are provided respectively.

  When the first current blocking portion is provided only on the final roller and the first current blocking portion is not provided on the upstream side of the roller, the accompanying flow is amplified until reaching the final roller. The velocity of the wake is considerably increased. If such a large accompanying flow is blocked by the first flow blocking portion provided in the final roller, a part of the accompanying flow may flow backward to other rollers located upstream of the final roller. There is. Therefore, in the present invention, not only the final roller but also at least one roller located upstream of the first roller is provided with the first current shielding portion. As a result, the accompanying flow that flows along the yarn is prevented from amplifying the speed of the preceding roller before reaching the final roller. Can suppress the backflow caused by colliding with the first current shielding portion.

  According to a sixth aspect of the present invention, there is provided the yarn heating device according to any one of the first to third aspects, wherein the plurality of rollers are positioned on the downstream side in the yarn traveling direction with respect to the first roller and the first roller. And a second roller having a yarn feed speed higher than that of the first roller, and the first current blocking portion is provided at least on the second roller.

  As the yarn feed speed of the roller increases, the degree of amplification of the accompanying flow increases. Therefore, in the present invention, in order to effectively suppress the speed of the accompanying flow, the first current blocking portion is provided at least on the second roller having a high yarn feed speed.

  In any one of the first to sixth inventions, the yarn heating device according to a seventh invention is characterized in that the first current shielding portion is provided on each of the rollers.

  In the present invention, the amplification effect of the accompanying flow is individually suppressed in each of the plurality of rollers, so that the speed of the accompanying flow finally discharged from the yarn outlet can be reliably suppressed.

  The yarn heating device according to an eighth aspect of the present invention is the yarn heating apparatus according to any one of the first to seventh aspects, wherein the winding is provided on at least one of the rollers, and the winding of the outer peripheral surface of the roller from the outside of the roller It is characterized by further comprising a second current-carrying portion that extends toward a portion of the hanging region on the upstream side in the yarn traveling direction.

  In the present invention, in addition to the first current blocking portion provided in the downstream portion of the roller winding region in the yarn traveling direction, the present invention also includes the second current blocking portion in the upstream portion of the yarn traveling direction. In other words, the current flow is amplified on the outer circumferential surface of the roller, and the current flow is amplified on the start and end sides of the section around which the yarn is wound. , More reliably suppressed.

  According to a ninth aspect of the present invention, there is provided the yarn heating device according to any one of the first to eighth aspects, wherein the first current blocking portion is located closer to an outer peripheral surface of the roller, and the roller than the proximity position. It is possible to move over a retracted position away from the outer peripheral surface.

  In order to suppress the accompanying flow amplified by the rotation of the roller from flowing to the downstream side, it is preferable that the first current blocking portion extends to a position as close as possible to the outer peripheral surface of the roller. However, when the first current shielding portion is provided up to the vicinity of the outer peripheral surface of the roller, it is difficult to thread the roller. In this regard, in the present invention, the first current shielding portion is movable between the proximity position and the retracted position. Therefore, since the first current shielding portion can be moved to the retracted position when threading and the first current shielding portion can be temporarily separated from the roller, threading on the roller is facilitated.

  According to a tenth aspect of the present invention, in the ninth aspect of the invention, the yarn heating apparatus further includes a biasing member that biases the first current blocking portion toward the proximity position.

  When threading the roller, the operator pushes up the first current-shielding portion at the close position against the urging member and retracts it to the retracted position, and then threading the roller. When the threading operation on the roller is finished and the first current shielding portion is not pushed up, the first current shielding portion naturally returns from the retracted position to the adjacent position by the urging force of the urging member. Therefore, after threading, forgetting to return the first current shielding part from the retracted position to the close position, the yarn is processed while the first current shielding part remains in the retracted position. Absent.

  The yarn heating device according to an eleventh aspect of the invention is characterized in that, in any one of the first to tenth aspects, a separation distance between the first current blocking portion and the outer peripheral surface of the roller is 10 mm or less. Is.

  In order to suppress the accompanying flow along the outer peripheral surface of the roller, the first current blocking portion is preferably located at a position close to the outer peripheral surface of the roller. Specifically, the separation distance between the first current blocking portion and the outer peripheral surface of the roller is preferably 10 mm or less.

It is a schematic block diagram of the spinning take-up apparatus which concerns on this embodiment. It is sectional drawing of a heating extending part. It is a figure explaining the flow of the accompanying flow in a heat insulation box. FIG. 3 is an enlarged view of the vicinity of the final godet roller in FIG. 2. It is an enlarged view near the last godet roller in a modified form. It is an enlarged view near the last godet roller of another modification. It is sectional drawing of the heating extending | stretching part of another modification. It is sectional drawing of the heating extending | stretching part of another modification. It is sectional drawing of the heating extending | stretching part of another modification. It is an enlarged view near the last godet roller of another modification.

  Next, an embodiment of the present invention will be described. FIG. 1 is a schematic configuration diagram of a spinning take-up device according to the present embodiment. As shown in FIG. 1, the spinning take-up device 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 device 3 includes an oil agent guide 6 and a heating drawing unit 7 (yarn heating device of the present invention).

  The oil agent guide 6 applies 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 6 are sent to the heating and stretching unit 7 having five godet rollers 11 a to 11 e via the guide roller 17.

  FIG. 2 is a cross-sectional view of the heating and stretching unit 7. As shown in FIGS. 1 and 2, the heating and stretching unit 7 includes a heat retaining box 16 and five godet rollers 11 a to 11 e housed in the heat retaining box 16. The heat insulating box 16 is a box formed of a heat insulating material. In one side wall portion (the right side wall portion in FIGS. 1 and 2) of the heat insulation box 16, a yarn introduction port 16a for introducing a plurality of yarns Y into the heat insulation box 16 and a plurality of yarns Y are kept in the heat insulation box. A yarn outlet 16b for leading from the inside to the outside is formed. The yarn introduction port 16 a is formed at the lower end portion of the side wall portion of the heat insulation box 16, and the yarn outlet port 16 b is formed at the upper end portion of the side wall portion of the heat insulation box 16. In addition, five partition plates 21 to 25 are provided inside the heat insulation box 16 so as to partition a space in which the five godet rollers 11a to 11e are accommodated.

  Of the five godet rollers 11 a to 11 e, the godet roller 11 a is disposed near the bottom of the heat insulation box 16. Above the godet roller 11, the other four godet rollers 11 b to 11 e are arranged in a staggered manner in the horizontal direction of the drawing. A plurality of yarns Y introduced into the heat insulation box 16 from the yarn introduction port 16a are wound around the five godet rollers 11a to 11e in order from the lower godet roller 11. The yarn Y is wound around each of the five godet rollers 11a to 11e at a winding angle θ of less than 270 degrees. That is, the yarn Y is not wound around the godet rollers 11a to 11e at least once. Accordingly, the yarn Y is sequentially fed by the five godet rollers 11a to 11e, so that the yarn Y is introduced from the yarn introduction port 16a along the meandering yarn path that does not intersect in the middle in a plane parallel to the paper surface of FIG. Drive to 16b.

  Further, the five godet rollers 11a to 11e are rotationally driven by motors (not shown). Each of the five godet rollers 11a to 11e is a yarn heating roller having a heater 20 therein.

  Among the five godet rollers 11, three godet rollers 11a to 11c (first rollers of the present invention) located on the lower side and upstream in the yarn traveling direction are used for preheating the plurality of yarns Y to a temperature at which they can be drawn. This is a yarn heating roller. In the case of a yarn made of polyester fiber, the glass transition temperature of the yarn Y is about 80 ° C., and the heating temperatures (roller surface temperatures) of the three godet rollers 11a to 11c are slightly higher than the glass transition temperature (for example, 80 to 95 ° C.). On the other hand, the two godet rollers 11d and 11e (second roller of the present invention) located on the upper side and downstream in the yarn traveling direction are yarn 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 11d and 11e is set to a temperature (for example, 120 to 150 ° C.) higher than the heating temperature of the lower three godet rollers 11a to 11c. Further, the yarn feeding speeds of the upper two godet rollers 11d and 11e are higher than those of the lower three godet rollers 11a to 11c. The controller 8 performs temperature control of the heater 20 (heating control of the yarn Y) and motor rotation control (yarn feed speed control) for each of the five godet rollers 11a to 11e.

  As shown in FIG. 2, current blocking plates 30 (first current blocking portions of the present invention) are respectively provided on the outer sides of the five godet rollers 11 a to 11 e. The detailed configuration of the current shielding plate 30 and the function and effect thereof will be described later.

  The plurality of yarns Y introduced into the heat insulation box 16 are first preheated to a temperature at which they can be stretched, that is, the glass transition temperature, while being sent by the lower three godet rollers 11a to 11c. The plurality of yarns Y preheated to the glass transition temperature are stretched by the yarn feed speed difference between the two godet rollers 11c and 11d. Further, the plurality of yarns Y are heated to a higher temperature while being sent by the upper two godet rollers 11d and 11e, and the stretched state is heat-set. The plurality of yarns Y drawn as described above are led out of the heat insulation box 16 from the yarn outlet port 16b and further fed to the yarn winding device 4 by the guide roller 18.

  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 9. The contact roller 28 contacts the surface of the plurality of winding packages 9 and applies a predetermined contact pressure to adjust the shape of the winding package 9.

  Next, the current shielding plate 30 provided in the heat insulation box 16 will be described. FIG. 3 is a diagram for explaining the flow of the accompanying flow in the heat insulating box 16. As described above, the yarn Y introduced into the heat insulating box 16 from the yarn introduction port 16a is wound around each of the five godet rollers 11a to 11e at a winding angle of less than 270 degrees. Therefore, as shown in FIGS. 2 and 3, the yarn Y travels from the yarn introduction port 16a to the yarn outlet port 16b along a meandering yarn path that does not intersect in the middle in a plane parallel to the paper surface. At this time, as indicated by arrows in FIG. 3, in the vicinity of the outer peripheral surface of each roller 11, the surrounding air flows in the circumferential direction as the roller 11 rotates, and an accompanying flow 40 is generated. First, the accompanying flow 40 generated in the godet roller 11a near the yarn introduction port 16a flows to the next godet roller 11b along the yarn path, and the velocity of the accompanying flow 40 is amplified by the rotation of the next godet roller 11b. By repeating the amplification of the accompanying flow 40, the speed of the accompanying flow 40 increases toward the yarn outlet 16b while the yarn Y is sequentially sent by the five godet rollers 11a to 11e.

  Therefore, particularly in the godet roller 11e (the final roller of the present invention) located on the most downstream side in the yarn traveling direction, the speed of the accompanying flow 40 is considerably increased. The hot air in the heat insulation box 16 is discharged from the yarn outlet 16b together with the yarn Y by the accompanying flow 40, so that the loss of heat energy increases. Therefore, in this embodiment, in order to suppress the speed of the accompanying flow 40 that flows along with the yarn Y from being amplified by the rotation of the godet rollers 11a to 11e, for each of the godet rollers 11a to 11e, A current blocking plate 30 is provided to block the accompanying flow 40 flowing along the outer peripheral surface.

  FIG. 4 is an enlarged view of the vicinity of the final godet roller 11e in FIG. As shown in FIGS. 2 and 4, each of the current shielding plates 30 is attached to the inner wall surface of the heat insulation box 16 or the partition plates 22 to 25 via attachment members 31. In addition, the current shielding plate 30 is rotatably connected to the attachment member 31 by a hinge 32. As a result, the current blocking plate 30 has a tip position close to the outer peripheral surface of the corresponding godet roller 11 (11a to 11e) (indicated by a solid line) and a retreat position (indicated by a two-dot chain line) away from the proximity position. It is possible to move. The current shielding plate 30 is urged toward the proximity position by a torsion spring 33 (the urging member of the present invention) provided on the hinge 32.

  Further, the amplification of the accompanying flow 40 flowing along the yarn traveling direction occurs in the winding region (section a in FIG. 4) on which the yarn Y is wound on the outer peripheral surface of each of the five godet rollers 11a to 11e. Therefore, the current shielding plate 30 extends from the outside of the corresponding godet roller 11 toward the downstream portion in the yarn traveling direction in the winding region (section a). Further, in order to reliably suppress the accompanying flow amplified by the rotation of the godet roller 11 from flowing downstream from the roller 11 in the yarn traveling direction, the accompanying flow is caused to be as downstream as possible in the winding region of the roller 11. It is preferable to block. Therefore, in this embodiment, the yarn Y wound around the godet roller 11 extends toward the final point of the section a, that is, the yarn separation position P1 where the godet roller 11 is separated.

  As a result, in the region where the accompanying flow is amplified by the rotation of the godet roller 11, the accompanying flow is blocked by the flow blocking plate 30, so that the accompanying flow having a high speed is moved downstream from the roller 11 in the traveling direction of the yarn Y. Flow can be suppressed. In particular, in this embodiment, the current shielding plate 30 extends toward the yarn separation position P1 (the final point of the yarn Y winding section). As a result, at the position where the amplification of the accompanying flow is completed by the rotation of the roller 11, the accompanying flow 40 a is blocked by the flow blocking plate 30, and the accompanying flow having a high speed is downstream from the roller 11 in the traveling direction of the yarn Y. It can be reliably prevented from flowing to the side. As a result, the speed of the accompanying flow 40b from the final godet roller 11e toward the yarn outlet 16b can be reduced, and thermal energy loss can be suppressed.

  The examination result about suppression of the accompanying flow by the current shielding plate 30 is shown below. In FIG. 4, when the yarn feed speed (Vf) of the yarn Y by the godet roller 11 is 4500 m / min, the speed (V1a) of the accompanying flow on the upstream side in the yarn traveling direction of the current shielding plate 30 is 16.4 m / min. s. On the other hand, the velocity (V1b) of the accompanying flow on the downstream side in the yarn traveling direction of the current shielding plate 30 was reduced to 3.12 m / s.

  Moreover, in this embodiment, the current shielding board 30 is each provided with respect to all the five godet rollers 11a-11e. Thereby, in each of the five godet rollers 11a to 11e, the amplification effect of the accompanying flow 40 is individually suppressed, and thus the speed of the accompanying flow 40 discharged from the yarn outlet 16b to the outside of the heat insulation box 16 is surely suppressed. be able to.

  In order to suppress the accompanying flow amplified by the rotation of each godet roller 11 from flowing downstream, the current blocking plate 30 is preferably located as close as possible to the outer peripheral surface of each godet roller 11. . For example, it is preferable that the separation distance d between the tip of the current blocking plate 30 and the outer peripheral surface of the godet roller 11 is 10 mm or less.

  However, when the current blocking plate 30 is provided up to the vicinity of the outer peripheral surface of the godet roller 11, it is difficult to thread the godet roller 11. In particular, when an operator performs threading on each roller 11 while inserting a suction gun for sucking and holding a plurality of yarns into the space between the godet rollers 11, the current blocking plate 30 is provided near the outer peripheral surface of the godet roller 11. When the is arranged, it is difficult to thread the thread as described above.

  In this respect, the current blocking plate 30 is movable between the proximity position and the retracted position. Therefore, since the current blocking plate 30 can be moved to the retracted position when threading and the current blocking plate 30 can be temporarily separated from the godet roller 11, threading on the godet roller 11 is facilitated.

  The current shielding plate 30 is urged toward the proximity position by the torsion spring 33. When threading the godet roller 11, the operator pushes up the current blocking plate 30 in the proximity position against the urging force of the torsion spring, retracts it to the retracted position, and then applies it to the roller 11. Perform threading. When the threading on the godet roller 11 is finished and the push-up of the current shielding plate 30 is stopped, the current shielding plate 30 naturally returns from the retracted position to the close position by the urging force of the torsion spring 33. For this reason, after threading, forgetting to return the current blocking plate 30 from the retracted position to the close position, the yarn processing is not performed while the current blocking plate 30 remains in the retracted position.

  Moreover, in this embodiment, as shown in FIG. 2, each baffle plate 30 rotates so that it may retract | save from a proximity position along the rotation direction (yarn running direction) of the corresponding godet roller 11. For example, in the godet roller 11a, the current blocking plate 30 can be rotated in the right direction in the drawing from the state in the proximity position. It can be rotated in the direction. This configuration is particularly convenient when threading is performed with the suction gun holding the yarn Y inserted between the godet rollers 11. That is, the operator performs threading while moving the suction gun held in the hand in the rotational direction of the five godet rollers 11a to 11e. At that time, the suction gun itself is applied to the current shielding plate 30 and retracted from the roller 11 so as to push away the current shielding plate 30, while moving the suction gun relative to the godet roller 11 along its rotational direction, The yarn Y can be hung on the godet roller 11.

  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] In the above-described embodiment, the current shielding plate 30 extends toward the yarn separation position in the winding region of the godet roller 11, but the current shielding plate 30 is in the yarn traveling direction with respect to the yarn separation position P1. You may extend toward the position which went back upstream. For example, as shown in FIG. 5, the current blocking plate 30 has an angle α (= 60 degrees) from the yarn separation position P1 and the yarn separation position P1 to the upstream side in the yarn traveling direction in the winding region (section a) of the godet roller 11. ) It may extend toward the part (section b) up to the retroactive position P3. Alternatively, as shown in FIG. 6, the current blocking plate 30 is in a portion (section c) between the yarn separation position P <b> 1 and the intermediate point P <b> 4 of the winding area (section a) in the winding area of the godet roller 11. It may extend toward.

2] In the above-described embodiment, the current blocking plates 30 are provided on all the five godet rollers 11, but the current blocking plates 30 are not necessarily provided on all the rollers 11, and the layout in the heat insulating box 16 is not necessarily provided. For reasons such as restrictions, the current blocking plate 30 may be provided only on any one of the godet rollers 11. Hereinafter, some examples of the form in which the current blocking plate 30 is provided only on some of the godet rollers 11 will be given.

(A) The yarn Y sent out from the final godet roller 11e is led out of the heat insulation box 16 from the yarn outlet 16b. That is, if the accompanying flow in the final godet roller 11e flows to the downstream side as it is, the heat energy loss increases. Therefore, in order to prevent the accompanying flow 40 having a high velocity from flowing downstream from the final godet roller 11e and discharged from the yarn outlet 16b, as shown in FIG. 7, in particular, the final godet roller 11e ( The final roller) of the present invention is preferably provided with a current blocking plate 30.

(B) As shown in FIG. 7, when the current blocking plate 30 is provided only on the final godet roller 11e, and the current blocking plate 30 is not provided on the roller 11 on the upstream side thereof, the final godet roller 11e is reached. By this time, the accompanying flow 40 is amplified, and the velocity of the accompanying flow 40 in the final godet roller 11e is considerably increased. When such an accompanying flow 40 having a high velocity is blocked by the current blocking plate 30 provided in the final godet roller 11e, a part of the accompanying flow 40 that collides with the current blocking plate 30 is located upstream of this. There is a possibility that it may flow backward to the other godet roller 11 side. In particular, when the yarn Y to which the oil agent is applied is sent by the high-temperature godet roller 11, oil smoke is generated. The oil component adheres to the low-temperature godet rollers 11a to 11c, which causes the quality of the yarn Y to deteriorate.

  Therefore, it is more preferable that the current blocking plate 30 is provided not only for the final godet roller 11e but also for at least one roller 11 located upstream of the final godet roller 11e. For example, in FIG. 8, in addition to the final godet roller 11e, the godet roller 11c is also provided with a current blocking plate 30. In this configuration, the accompanying flow 40 flowing along the yarn path is suppressed in speed amplification by the current blocking plate 30 provided on the intermediate roller 11c before reaching the final godet roller 11e. The backflow when colliding with the current shielding plate 30 can be suppressed by suppressing the velocity of the accompanying flow 40 in 11e.

(C) As the yarn feed speed of the godet roller 11 increases, the degree of amplification of the accompanying flow 40 in the roller 11 increases. In the above-described embodiment, among the five godet rollers 11a to 11e, the two godet rollers 11d and 11e on the downstream side are faster than the three godet rollers 11a to 11c on the upstream side in the yarn traveling direction, and the godet roller The yarn Y is stretched between 11c and the godet roller 11d. Therefore, as shown in FIG. 9, current blocking plates 30 may be provided on the two godet rollers 11d and 11e on the downstream side where the yarn feed speed is high.

3] As described above, the velocity of the accompanying flow 40 is amplified in each godet roller 11, particularly in the section a where the yarn Y is hung. In order to more effectively suppress the velocity of the accompanying flow 40 in the section a, a current blocking plate may be provided at a position other than that shown in the embodiment.

  For example, in FIG. 10, on the outer peripheral surface of the godet roller 11, not only the end point side (downstream side in the yarn traveling direction) of the section a around which the yarn Y is wound, but also the starting point side of the section a, that is, the yarn traveling direction. A current blocking plate 50 (second current blocking portion of the present invention) may also be provided on the upstream side. In particular, in FIG. 10, the current shielding plate 50 extends toward the yarn contact position P <b> 2 where the yarn contacts the roller 11. Thus, since the current shielding plates 30 and 50 are respectively provided on the start point side and the end point side of the section a, amplification of the accompanying flow 40 due to the rotation of the godet roller 11 is more reliably suppressed. In FIG. 10, the current blocking plate 50 on the yarn contact position P2 side has the same configuration as that of the current blocking plate 30 on the yarn separation position P1, but may have a different configuration. .

  The examination result about suppression of the accompanying flow by the current shielding plates 30 and 50 in the form of FIG. 10 is shown below. In FIG. 10, when the yarn feed speed (Vf) of the yarn Y by the godet roller 11 is 4500 m / min, the flow velocity (V2a) of the accompanying flow on the upstream side in the yarn traveling direction of the current shielding plate 50 is 3.12 m / s. The accompanying flow velocity (V1a) on the upstream side in the yarn traveling direction of the current shielding plate 30 was 11.4 m / s. On the other hand, the velocity (V1b) of the accompanying flow on the downstream side in the yarn running direction of the current shielding plate 30 was 1.63 m / s.

4] In the above-described embodiment, the upstream three godet rollers 11a to 11c are yarn heating rollers for preheating the yarn Y before stretching, and the two godet rollers 11d and 11e on the downstream side are configured to feed the yarn Y after stretching. Although it is a yarn heating roller for heat fixing, the number of preheating godet rollers and the number of heat fixing godet rollers can be appropriately changed.

  Further, not all the godet rollers 11 in the heat insulation box 16 need to be yarn heating rollers. For example, when the yarn is nylon having a glass transition temperature lower than that of polyester, it is often unnecessary to heat the yarn before drawing. In this case, the godet roller 11 for sending the yarn Y before drawing may be a non-heated roller.

2 Spinning device 7 Heating and stretching sections 11a to 11e Godet roller 16 Insulation box 16b Yarn outlet 16a Yarn inlet 30 Current shield plate 33 Torsion spring 50 Current shield plate

Claims (11)

A heat insulation box having a yarn introduction port for introducing yarn and a yarn outlet port for extracting the yarn;
A plurality of rollers each housed in the heat insulation box and including a yarn heating roller for heating the yarn, and sending the yarn from the yarn introduction port to the yarn outlet port,
The yarn introduced into the heat insulation box from the yarn introduction port is wound around each of the plurality of rollers at a winding angle of less than 270 degrees,
A first current shielding provided for at least one of the rollers and extending from an outer side of the roller toward a downstream portion in a yarn traveling direction in a yarn winding region on an outer peripheral surface of the roller. A yarn heating device further comprising a section.   The first current blocking portion is a yarn separation position where the yarn is separated from the roller in the winding region of the outer peripheral surface of the roller, and goes back 60 degrees upstream of the yarn separation direction from the yarn separation position. The yarn heating device according to claim 1, wherein the yarn heating device extends toward a portion between the two positions.   3. The yarn heating device according to claim 2, wherein the first current blocking portion extends toward the yarn separation position in the winding region of the outer peripheral surface of the roller.   The said 1st flow-shielding part is provided in the last roller located in the most downstream of the said thread | yarn driving | running | working direction at least among these rollers, The any one of Claims 1-3 characterized by the above-mentioned. The yarn heating device described.   The said 1st current-shielding part is each provided in the said last roller and the at least 1 roller located in the said thread running direction upstream rather than the said last roller, respectively. Yarn heating device. The plurality of rollers include a first roller and a second roller that is located downstream of the first roller in the yarn traveling direction and has a yarn feeding speed higher than that of the first roller.
The yarn heating device according to any one of claims 1 to 3, wherein the first current shielding portion is provided at least on the second roller.   The yarn heating device according to claim 1, wherein all the rollers are provided with the first current shielding portion.   A second current shielding portion that is provided for at least one of the rollers and extends from the outside of the roller toward the upstream portion of the winding region of the outer peripheral surface of the roller in the yarn traveling direction. The yarn heating device according to claim 1, further comprising:   The first current blocking portion is movable between a proximity position approaching the outer peripheral surface of the roller and a retreat position further away from the outer peripheral surface of the roller than the proximity position. The yarn heating device according to any one of?   The yarn heating apparatus according to claim 9, further comprising a biasing member that biases the first current shielding portion toward the proximity position.   The yarn heating device according to any one of claims 1 to 9, wherein a separation distance between the first current blocking portion and the outer peripheral surface of the roller is 10 mm or less.

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