Spinning and drawing device

Abstract

A spinning and drawing device realizes efficient use of heat energy in a heat-insulating box and suppresses yarn swing of yarn wound around a roller. The spinning and drawing device (3) has a guide path (60) having an inlet (61) formed at a position closest to a godet (35) among godets (31-35) and an outlet (62) formed at a position closest to a godet (31) among the godets (31-35). The inlet (61) is opened in a manner to overlap with a region along an axial direction of the godet (35) when viewed in a direction orthogonal to the axial direction of the godet (35), and the outlet (62) is opened in a manner to overlap with a region along an axial direction of the godet (31) when viewed in a direction orthogonal to the axial direction of the godet (31).

Description

TECHNICAL FIELD

[0001] The present application relates to a spinning and drawing device provided with a heat-insulating case that houses a yarn heating roller that heats a yarn. BACKGROUND

[0002] In Patent Literature 1, a spinning and drawing device is disclosed that houses a plurality of rollers including a yarn heating roller in a heat-insulating case, and that is provided with a yarn guide inlet and a yarn guide outlet formed in a wall portion that forms the heat-insulating case, and a first flow straightening portion that is disposed on an inner surface of the wall portion through which a gas flow flows toward the yarn guide outlet, so as to direct the gas flow toward the inside. By directing the gas flow that flows along the wall portion toward the inside with the first flow straightening portion, the outflow of high-temperature air from the yarn guide outlet is suppressed, and thus the loss of heat energy can be reduced.

[0003] In the vicinity of the yarn guide inlet of the heat-insulating case of Patent Literature 1, low-temperature air from the outside of the heat-insulating case flows in through the yarn guide inlet. Also, a heating roller disposed in the vicinity of the yarn guide inlet has a low-temperature yarn wound therearound that is guided in from the outside through the yarn guide inlet. Therefore, in the heat-insulating case of Patent Literature 1, although the loss of heat energy from the yarn guide outlet can be suppressed, the loss of heat energy due to the low-temperature air that flows in from the yarn guide inlet and the like cannot be suppressed, and the power consumption for heating the rollers increases.

[0004] Patent Literature 2 discloses a spinning and winding device provided with a heat-insulating case that houses a plurality of rollers, and an air duct that is installed to the heat-insulating case. The air duct guides high-temperature air in the vicinity of a yarn guide outlet in the heat-insulating case toward a low-temperature air region in the vicinity of a yarn guide inlet in the heat-insulating case. Thereby, heat energy can be efficiently utilized.

[0005] Patent Literature 1: Japanese Patent No. 6088948

[0006] Patent Literature 2: Japanese Patent Application Publication No. 2014-101611

[0007] However, in the device of Patent Literature 2, high-temperature air in the vicinity of the yarn guide outlet is guided into the air duct in a direction that is orthogonal to the end surface of the roller, i.e., a direction that is orthogonal to the traveling direction of the yarn wound around the roller. Furthermore, the high-temperature air that passes through the air duct is guided toward the low-temperature air region from a direction that is orthogonal to the traveling direction of the yarn wound around the roller. Therefore, there is a concern that the gas flow in the vicinity of the inlet and the outlet of the air duct becomes turbulent in a direction that is orthogonal to the traveling direction of the yarn, and the yarn swings. If the yarn swings, the quality of the yarn can be adversely affected. SUMMARY

[0008] The present application aims to provide a spinning and drawing device capable of efficiently utilizing heat energy in an oven and suppressing yarn swing of a yarn wound around a roller.

[0009] The spinning and drawing device of the first application is characterized by comprising: an oven having a yarn inlet for introducing a yarn and a yarn outlet for discharging the yarn; and a plurality of heating rollers housed in the oven, which heat and convey the yarn in a yarn travel direction from the yarn inlet toward the yarn outlet. The plurality of heating rollers include a first heating roller disposed at an uppermost upstream side in the yarn travel direction, a second heating roller disposed at a downstream side in the yarn travel direction relative to the first heating roller and having a higher temperature and a higher feed speed than the first heating roller, and at least one third heating roller disposed between the first and second heating rollers in the yarn travel direction. The device further comprises an air guide path having an inlet opening at a position closest to the second heating roller among the plurality of heating rollers and an outlet opening at a position closest to the first heating roller among the plurality of heating rollers in an internal space of the oven. At least a portion of the inlet opens in a manner overlapping a region along an axial direction of the second heating roller when viewed in a direction orthogonal to the axial direction of the second heating roller. At least a portion of the outlet opens in a manner overlapping a region along an axial direction of the first heating roller when viewed in a direction orthogonal to the axial direction of the first heating roller.

[0010] Low-temperature air from the outside flows into the portion of the oven in which the first heating roller is disposed through the yarn inlet. The yarn introduced from the outside is wound around the first heating roller. Therefore, more energy is consumed to maintain the temperature of the first heating roller. On the other hand, high-temperature air around the second heating roller flows out from the yarn outlet toward the outside of the oven by means of convection flow generated by rotation of the roller and travel of the yarn wound around the roller, resulting in a large energy loss.

[0011] According to the first invention, the high-temperature air flowing along the outer circumferential surface of the second heating roller and intended to flow out to the outside of the heat retaining box by the accompanying flow can be guided toward the guide path. Furthermore, the high-temperature air around the second heating roller can be guided toward the surroundings of the first heating roller using the guide path. Thus, energy loss due to the outflow of the high-temperature air to the outside of the heat retaining box can be suppressed, and the temperature around the first heating roller can be increased, and the heat energy can be efficiently utilized in the heat retaining box. Moreover, the inlet and the outlet of the guide path are opened in a manner that at least a part thereof overlaps with the region along the axial direction of the heating roller when viewed in the direction orthogonal to the axial direction of the heating roller. Thus, the high-temperature air around the second heating roller is guided toward the guide path in a direction parallel to the advancing direction of the yarn, and is further transported toward the surroundings of the first heating roller in a direction parallel to the advancing direction of the yarn. Thus, the yarn swing of the yarn wound around the heating roller can be suppressed.

[0012] The spinning and drawing device of the second invention is characterized in that, in the first invention, the inlet is opened at a position closer to the second heating roller than the yarn guide outlet, and the outlet is opened at a position closer to the first heating roller than the yarn guide inlet.

[0013] The flow of air is easily disturbed in the vicinity of the inlet and the outlet of the guide path. If the inlet of the guide path is opened at a position close to the yarn guide outlet, the yarn swing of the yarn guided out of the yarn guide outlet to the outside of the heat retaining box is easily generated. Moreover, if the outlet of the guide path is opened at a position close to the yarn guide inlet, the yarn swing of the yarn guided into the inside of the heat retaining box from the yarn guide inlet is easily generated. According to the second invention, the inlet of the guide path is opened at a position closer to the second heating roller than the yarn guide outlet, and the outlet of the guide path is opened at a position closer to the first heating roller than the yarn guide inlet. Thus, the generation of the yarn swing of the yarn guided into the inside of the heat retaining box from the yarn guide inlet and the yarn swing of the yarn guided out of the yarn guide outlet to the outside of the heat retaining box can be suppressed. Moreover, if the inlet of the guide path is opened at a position close to the yarn guide outlet, there is a concern that a part of the air guided toward the guide path from the inlet of the guide path flows out to the outside of the heat retaining box from the yarn guide outlet by the accompanying flow generated by the advancing of the yarn. In the second invention, the inlet of the guide path is opened at a position closer to the second heating roller than the yarn guide outlet, and thus the case where a part of the air guided toward the guide path from the inlet of the guide path flows out to the outside of the heat retaining box from the yarn guide outlet can be suppressed.

[0014] The spinning and drawing device of the third invention is characterized in that, in the first or second invention, the entire guide path is provided inside the heat retaining box.

[0015] According to the third invention, the air passing through the guide path is retained inside the heat retaining box, and thus the energy loss of the high-temperature air can be further reduced.

[0016] The spinning and drawing device of the fourth application is characterized in that, in the first to third applications, the entire circumference of the guide path is surrounded by a wall portion in a cross section orthogonal to the direction of extension of the guide path.

[0017] According to the fourth application, the air passing through the guide path can be prevented from leaking out halfway toward the inside of the heat insulating case. Therefore, the high-temperature air can be efficiently guided toward the surroundings of the first heating roller, and the thermal energy can be more efficiently utilized.

[0018] The spinning and drawing device of the fifth application is characterized in that, in the first to fourth applications, the inlet is formed to have a size that, when viewed in a direction orthogonal to the axial direction of the second heating roller, includes the winding region of the filaments on the outer peripheral surface of the second heating roller in the axial direction of the second heating roller.

[0019] According to the fifth application, the flow of air in the vicinity of the inlet of the guide path can be easily homogenized among the plurality of filaments. Thus, the generation of filament swing in the vicinity of the inlet of the guide path due to the disorder of the flow of air can be further suppressed, and the adverse effects on the quality of the filaments can be suppressed.

[0020] The spinning and drawing device of the sixth application is characterized in that, in the fifth application, a first shielding plate is further provided, the first shielding plate is provided in a first space region in the internal space of the heat insulating case that contacts the winding region of the filaments on the outer peripheral surface of the second heating roller, the amount of air flowing from the second heating roller toward the filament guide outlet is suppressed, and the suppressed air is guided toward the inlet.

[0021] According to the sixth application, the amount of air flowing along the outer peripheral surface of the second heating roller and desiring to flow out to the outside of the heat insulating case can be suppressed. Furthermore, the air transported from the upstream side to the downstream side of the filament travel direction by the convection flow generated on the outer peripheral surface of the second heating roller can be more guided to the guide path. Thus, the thermal energy can be more efficiently utilized.

[0022] The spinning and drawing device of the seventh application is characterized in that, in the first to sixth applications, a second shielding plate is further provided, the second shielding plate is provided in a second space region in the internal space of the heat insulating case that contacts the winding region of the filaments on the outer peripheral surface of the first heating roller, the amount of air flowing from the outlet toward the filament guide inlet is suppressed, and the suppressed air is guided toward the winding region of the filaments on the outer peripheral surface of the first heating roller.

[0023] According to the seventh application, it is possible to inhibit the high-temperature air guided by the guide path from flowing out from the yarn introduction port toward the outside of the heat-insulating case, and further, it is possible to guide the air toward the yarn-winding region of the outer peripheral surface of the first heating roller. Thereby, it is possible to inhibit the energy consumption when maintaining the temperature of the first heating roller, and it is possible to more efficiently utilize the heat energy.

[0024] The spinning and drawing device of the eighth application is characterized in that, in the first to seventh applications, a partition plate is further provided between the first heating roller and the third heating roller.

[0025] If the high-temperature air that passes through the guide path and is guided toward the periphery of the first heating roller moves to the periphery of the third heating roller, there is a case where the third heating roller excessively becomes high-temperature, and there is a concern that the quality of the yarn is damaged. According to the eighth application, it is possible to inhibit the movement of the high-temperature air around the first heating roller toward the periphery of the third heating roller by the partition plate. Thereby, it is possible to inhibit the third heating roller from excessively becoming high-temperature.

[0026] The spinning and drawing device of the ninth application is characterized in that, in the seventh application, the inlet is opened in the first space region of the inside space of the heat-insulating case that contacts the yarn-winding region of the outer peripheral surface of the second heating roller, and the outlet is opened in the second space region.

[0027] In the vicinity of the inlet and the outlet of the guide path, the flow of air is easily disturbed. When the inlet and the outlet of the guide path are opened toward the portion of the yarn that is transported in the yarn travel direction and is not wound on the heating roller, there is a concern that the yarn is swung due to the disturbance of the air, and the quality of the yarn is affected. According to the ninth application, the inlet of the guide path is opened in the first space region, and the outlet is opened in the second space region, and thereby, it is possible to further inhibit the case where the yarn is swung.

[0028] The spinning and drawing device of the tenth application is characterized in that, in the ninth application, the air passage area of at least a portion of the region of the second space region that is on the downstream side of the yarn travel direction with respect to the outlet is narrower than the area of the gap between the outlet and the outer peripheral surface of the first heating roller.

[0029] In the portion where the air passage area is narrow, the flow rate of the accompanying flow generated by the rotation of the first heating roller becomes fast. As a result, the pressure (static pressure) decreases, and the air is easily guided from the guide path toward the first heating roller. That is, in the portion where the air passage area is narrow, the air easily flows in. According to the tenth invention, with respect to the air guided toward the periphery of the first heating roller while passing through the guide path, the air easily flows into the portion where the air passage area is narrow in the second space region, and thus, it is possible to cause more high-temperature air to flow into the guide path from the inlet of the guide path, that is, to guide more high-temperature air toward the periphery of the first heating roller. For the above reason, it is possible to more efficiently utilize thermal energy.

[0030] The spinning and drawing device of the eleventh invention is characterized in that, in the tenth invention, the size of the gap between the guide path and the outer peripheral surface of the first heating roller, which is a portion of the air passage area, is 20 to 40 mm.

[0031] According to the eleventh invention, the size of the gap between the guide path and the outer peripheral surface of the first heating roller, which is a value that defines a portion of the air passage area, is made as narrow as possible within the range of sizes through which the front end of the suction gun for sucking the yarn that is being formed into a thread while being heated by the heating roller can pass. In the portion where the gap is narrow, the flow rate of the accompanying flow generated by the rotation of the first heating roller becomes fast. As a result, the pressure (static pressure) decreases, and the air is easily guided from the guide path toward the first heating roller. Thus, most of the high-temperature air that passes through the guide path and is guided toward the periphery of the first heating roller passes through the above gap and is transported toward the downstream side in the yarn travel direction. Therefore, it is possible to suppress the situation in which the high-temperature air guided by the guide path flows out from the yarn guide inlet toward the outside of the heat retaining box. Also, since the air easily flows into the above gap, it is possible to cause more high-temperature air to flow into the guide path from the inlet of the guide path, that is, to guide more high-temperature air toward the periphery of the first heating roller. For the above reason, it is possible to more efficiently utilize thermal energy.

[0032] The spinning and drawing device of the twelfth invention is characterized in that, in the first to eleventh inventions, the wall surface on one side in the axial direction of the plurality of heating rollers of the heat retaining box is a door portion, the plurality of heating rollers are supported by the wall surface on the other side in the axial direction of the plurality of heating rollers alone, and the distance between the end surface on the one side and the inner surface of the door portion is 9 mm or less.

[0033] If the distance between the end surface on one side of the heating roller and the door portion is large, the air flows between the end surface of the heating roller and the door portion, and thus, the guidance of the high-temperature air by the guide path cannot be efficiently performed. According to the twelfth invention, the air hardly enters and exits between the end surface of the heating roller and the door portion, and thus, the guidance of the high-temperature air by the guide path can be efficiently performed.

[0034] Effects of the Invention

[0035] In the spin-drawing device, efficient use of thermal energy in the heat-insulating case is enabled, and yarn swing of the yarn wound around the roller is suppressed. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a diagram showing a spinning draw frame provided with the spin-drawing device according to the present embodiment.

[0037] Figure 2 is an enlarged view of the spin-drawing device of Figure 1

[0038] Figure 3 is a III-III sectional view of Figure 2

[0039] Figure 4 is a graph showing power consumption of the spin-drawing device of the example and the comparative example.

[0040] EXPLANATION OF REFERENCE NUMERALS

[0041] 1 Spinning draw frame

[0042] 3 Spin-drawing device

[0043] 20 Heat-insulating case

[0044] 20a Yarn introduction port

[0045] 20b Yarn exit port

[0046] 24 Left side portion (wall portion)

[0047] 25 Left lower inclined portion (wall portion)

[0048] 26 Back portion (wall portion)

[0049] 31 Guide roller (1st heating roller)

[0050] 32 Guide roller (3rd heating roller)

[0051] 33 Guide roller (3rd heating roller)

[0052] 34 Guide roller (3rd heating roller)

[0053] 35 Guide roller (2nd heating roller)

[0054] 60 Guide path

[0055] 61 Inlet

[0056] 62 Outlet

[0057] 63 Connection wall portion (wall portion)

[0058] ​​71 first shielding plate

[0059] 72 second shielding plate

[0060] 73 partition plate

[0061] 80A first space region

[0062] 80B second space region DETAILED DESCRIPTION

[0063] (Overall structure of the spinning draw frame 1)

[0064] Hereinafter, a preferred embodiment of the present application will be described with reference to the accompanying drawings. Figure 1 is a schematic configuration view of the spinning draw frame 1 to which the present embodiment is applied. The spinning draw frame 1 is provided with a spinning device 2, a spinning draw device 3, and a thread winding device 4 as shown in Figure 1 . Hereinafter, the up-down and left-right directions of the paper surface of Figure 1 will be referred to as up-down and left-right directions. Also, the direction perpendicular to the paper surface of Figure 1 will be referred to as a front-rear direction, and the paper surface side will be referred to as the front.

[0065] The spinning draw frame 1 is formed into a structure in which a plurality of threads Y formed by solidifying a molten fiber material such as polyester continuously spun from the spinning device 2 are stretched by the spinning draw device 3, and then wound by the thread winding device 4, as shown in Figure 1 .

[0066] The spinning device 2 generates a plurality of threads Y by continuously spinning a molten fiber material such as polyester. The plurality of threads Y spun from the spinning device 2 are delivered toward the spinning draw device 3 via a guide roller 11 after being oiled by an oiling godet 10.

[0067] The spinning draw device 3 is a device that performs heat stretching on the plurality of threads Y, and is disposed below the spinning device 2. The spinning draw device 3 has a plurality of godets 31 to 35 housed inside a heat-insulating case 20. The spinning draw device 3 will be described in detail later.

[0068] The plurality of yarns Y stretched by the spin draw device 3 are guided by a guide roller 12 and are transported toward a yarn winding device 4. The yarn winding device 4 is a device that winds the plurality of yarns Y, and is disposed below the spin draw device 3. The yarn winding device 4 has a bobbin cradle 13 and a contact roller 14, and the like. The bobbin cradle 13 has a cylindrical shape that extends in the front-rear direction, and is rotationally driven by a motor not shown. In the bobbin cradle 13, a plurality of bobbins B are fitted in a side-by-side state in the axial direction. The yarn winding device 4 simultaneously winds the plurality of yarns Y on the plurality of bobbins B by rotating the bobbin cradle 13, and produces a plurality of packages P. The contact roller 14 contacts the surfaces of the plurality of packages P and applies a predetermined contact pressure, and adjusts the shapes of the packages P.

[0069] (Spin draw device 3)

[0070] Next, the structure of the spin draw device 3 of the present embodiment will be described with reference to Figure 2 and Figure 3 The spin draw device 3 of the present embodiment is a device that draws a plurality of yarns Y by a plurality of heating rollers 31 to 35, and is a device that draws the plurality of yarns Y by a plurality of heating rollers 31 to 35. Figure 2 is an enlarged view of the spin draw device 3 of Figure 1 . Also, Figure 3 is a III-III sectional view of Figure 2 , and the near front side of the paper is the upper side. The spin draw device 3 has a heat-insulating case 20, and a plurality of (in this case, five) godets 31 to 35 (heating rollers of the present invention) housed inside the heat-insulating case 20. The heat-insulating case 20 is formed in a case shape by an upper surface portion 21, a right side surface portion 22, a right lower inclined portion 23, a left side surface portion 24, a left lower inclined portion 25, a back surface portion 26 (see Figure 3 ), and a front surface portion 27 (see Figure 3 ). A yarn introduction port 20a for introducing the plurality of yarns Y into the inside of the heat-insulating case 20 is formed in the lower portion of the right side surface portion 22 of the heat-insulating case 20, and a yarn exit port 20b for leading the plurality of yarns Y out of the heat-insulating case 20 is formed in the upper portion of the right side surface portion 22 of the heat-insulating case 20. Also, the front surface portion 27 of the heat-insulating case 20 is attached to the left side surface portion 24 via a hinge not shown, and is formed as a door portion that can be opened and closed by swinging in the front-rear direction about the hinge. The starting operation of the yarn Y for each of the godets 31 to 35 is performed in a state in which the front surface portion 27 is opened.

[0071] Each of the godets 31 to 35 is a roller that heats the yarn Y and feeds the yarn in the yarn travel direction from the yarn inlet 20a toward the yarn outlet 20b. Each of the godets 31 to 35 protrudes toward the front surface portion 27. Further, each of the godets 31 to 35 is arranged in the order of the godets 31 to 35 from the upstream side in the yarn travel direction within the oven 20. The plurality of yarns Y are looped around each of the godets 31 to 35 in a smaller angle than 360 degrees in the order from the lower godet 31. Each of the godets 31 to 35 is driven in rotation (the direction of rotation is indicated by arrows in FIG. 4) by a motor not shown at a predetermined godet speed. Further, each of the godets 31 to 35 has a heater not shown built therein, and the surface of each of the godets 31 to 35 is heated by the heater. Figure 2

[0072] The lower three godets 31 to 33 are preheating godets for preheating the plurality of yarns Y before being stretched, and the roller surface temperature thereof is set to a temperature (for example, about 90 to 100°C) higher than the glass transition temperature of the yarn Y. On the other hand, the upper two godets 34 and 35 are setting godets for heat setting the plurality of yarns Y after being stretched, and the roller surface temperature thereof is set to a temperature (for example, about 150 to 200°C) higher than the roller surface temperature of the lower three godets 31 to 33. Further, the godet speed of the upper two godets 34 and 35 is faster than that of the lower three godets 31 to 33.

[0073] The plurality of yarns Y introduced into the oven 20 through the yarn inlet 20a are first preheated to a temperature at which the yarns can be stretched during the period of being fed by the godets 31 to 33. The preheated plurality of yarns Y are stretched by the difference in the godet speed between the godet 33 and the godet 34. Further, the plurality of yarns Y are further heated to a high temperature during the period of being fed by the godets 34 and 35, and the state after being stretched is heat set. The plurality of yarns Y after being stretched are guided out of the oven 20 through the yarn outlet 20b.

[0074] In the present embodiment, the godet 31 arranged at the most upstream side in the yarn travel direction corresponds to the first heating roller of the present application. The air introduced into the oven 20 from the yarn inlet 20a is initially guided to the vicinity of the first heating roller, that is, the godet 31. Further, the godet 35 arranged at the downstream side in the yarn travel direction from the godet 31, which is faster in the godet speed and higher in the temperature than the godet 31, corresponds to the second heating roller of the present application. Further, the three godets 32 to 34 arranged between the godet 31 and the godet 35 correspond to the third heating roller of the present application.

[0075] ​Inside the incubator 20, rectifying members 41 to 45 are provided. The rectifying members 41 to 45 are plate-like members that protrude from the back surface portion 26 toward the front surface portion 27 of the incubator 20. With the rectifying members 41 to 45, the air flowing from the thread lead-in port 20a of the incubator 20 toward the thread lead-out port 20b generally follows the thread travel direction. In addition, a slight gap is present between the rectifying member 45 and the right side surface portion 22. By providing the gap, the exchange of heat between the low-temperature air outside the incubator 20 and the high-temperature air inside the incubator 20 is suppressed. That is, the rectifying member 45 has a function as a heat insulating member.

[0076] Also, inside the incubator 20, blocking members 51 to 53 are provided. The blocking members 51 to 53 extend toward the outer peripheral surface of the thread guide roller 34, with their front end portions approaching the outer peripheral surface of the thread guide roller 34. With the blocking members 51 to 53, the convection current generated at the outer peripheral surface of the thread guide roller 34 is blocked, and the amplification of the convection current inside the incubator 20 is suppressed. Thus, it is possible to suppress the situation in which a large amount of heat escapes from the thread lead-out port 20b due to the convection current advancing toward the downstream side of the thread travel direction.

[0077] Here, the "periphery of a thread guide roller" with respect to one thread guide roller is the region closest to the one thread guide roller compared to the other thread guide rollers. The periphery of each of the thread guide rollers 31 to 35 in the present embodiment refers to the region surrounded by any of the plurality of members of the upper surface portion 21, the right side surface portion 22, the right lower inclined portion 23, the left side surface portion 24, the left lower inclined portion 25, the rectifying members 41 to 45, the blocking members 51 to 53, the connection wall portion 63 described later, and the partition plate 73. For example, the periphery of the thread guide roller 31 refers to the region surrounded by the right lower inclined portion 23, the connection wall portion 63 described later, the partition plate 73 described later, and the rectifying member 41. Also, for example, the periphery of the thread guide roller 35 refers to the region surrounded by the left side surface portion 24, the upper surface portion 21, the rectifying member 44, and the rectifying member 43.

[0078] The low-temperature air outside the incubator 20 flows into the vicinity of the thread lead-in port 20a of the incubator 20 of the spinning draft device 3 through the thread lead-in port 20a. Also, inside the incubator 20, the low-temperature thread Y introduced from the outside through the thread lead-in port 20a is wound around the thread guide roller 31 disposed at the most upstream side in the thread travel direction. Therefore, in order to sufficiently maintain the temperature of the thread Y on the surface of the thread guide roller 31, more energy is consumed. On the other hand, the high-temperature air around the thread guide roller 35 flows out from the thread lead-out port 20b toward the outside of the incubator 20 by the convection current generated by the rotation of the thread Y wound around the thread guide roller 35, and becomes a large energy loss.

[0079] Therefore, regarding the spin drawing device 3 of the present embodiment, in order to suppress the outflow of the high-temperature air in the oven 20 from the thread guide outlet 20b and suppress the energy consumption for maintaining the temperature of the thread Y on the surface of the godet 31, a structure having the guide path 60 is formed.

[0080] The guide path 60 of the air is provided inside the oven 20, the inlet 61 of which is opened at a position closest to the godet 35 among the godets 31 to 35, and the outlet 62 of which is opened at a position closest to the godet 31 among the godets 31 to 35. Also, as shown in Figure 2 the inlet 61 is opened at a position closer to the godet 35 than the thread guide outlet 20b, and the outlet 62 is opened at a position closer to the godet 31 than the thread guide inlet 20a.

[0081] The guide path 60 includes a portion of the left side surface portion 24, a portion of the left lower inclined portion 25, a portion of the back surface portion 26 of the oven 20, and a connecting wall portion 63 connecting the left side surface portion 24 and the back surface portion 26 and the left lower inclined portion 25 and the back surface portion 26. The connecting wall portion 63 has a portion extending in the left-right direction and a portion extending in the front-rear direction, as shown in Figure 3 In a cross section orthogonal to the extending direction of the guide path 60, the guide path 60 is entirely surrounded by the left side surface portion 24 or the left lower inclined portion 25, the back surface portion 26, and the connecting wall portion 63. That is, the guide path 60 is formed in a pipe shape with the outer periphery being closed. In the present embodiment, the left side surface portion 24, the left lower inclined portion 25, the back surface portion 26, and the connecting wall portion 63 correspond to the wall portion of the present application.

[0082] The dimension of the cross section orthogonal to the extending direction of the guide path 60 except for the portion near the inlet 61 is, for example, 16 mm x 155 mm (cross-sectional area 2480 mm 2 ). Also, the cross-sectional area of the cross section orthogonal to the extending direction of the guide path 60 near the inlet 61 becomes larger as it approaches the inlet 61, and the area of the inlet 61 is the largest (cross-sectional area 6300 mm 2 ). In addition, if the cross-sectional area of the cross section orthogonal to the extending direction of the guide path 60 is too narrow, the resistance becomes large, and there is a concern that the air will not flow in the guide path 60. Therefore, the dimension of the cross section orthogonal to the extending direction of the guide path 60 is preferably at least the cross-sectional area of the cross section is 800 mm 2 or more.

[0083] Also, as shown in Figure 2As shown, the size dl of the gap between the connecting wall portion 63 of the guide path 60 and the outer peripheral surface of the guide roller 31 is 20 to 40 mm. In addition, the members constituting the guide path 60 (the back surface portion 26, the left side surface portion 24, the left lower inclined portion 25, and the connecting wall portion 63) are preferably heat insulating members. Thereby, the exchange of thermal energy between the inside and the outside of the guide path 60 can be suppressed, and the energy loss of the air passing through the guide path 60 can be suppressed.

[0084] The inlet 61 of the guide path 60 is a portion surrounded by the left side surface portion 24, the back surface portion 26, and the upper end portion of the connecting wall portion 63. The outlet 62 of the guide path 60 is a portion surrounded by the left lower inclined portion 25, the back surface portion 26, and the lower end portion of the connecting wall portion 63.

[0085] The inlet 61 of the guide path 60 is opened in a manner that overlaps with the region of the guide roller 35 along the axial direction, that is, the front-rear direction, when viewed in a direction orthogonal to the axial direction (in this embodiment, the up-down direction) of the guide roller 35 (refer to Figure 2 , and Figure 3 ). The outlet 62 of the guide path 60 is opened in a manner that overlaps with the region of the guide roller 31 along the axial direction, that is, the front-rear direction, when viewed in a direction orthogonal to the axial direction (in this embodiment, the direction inclined to the left side compared to the up-down direction, that is, the direction in which the guide path 60 extends) of the guide roller 31. In addition, the "region of the guide roller along the axial direction, that is, the front-rear direction" refers to the peripheral space of the guide roller from the end surface of the front side to the end surface of the rear side when viewed from the up-down direction or the left-right direction.

[0086] Further, as shown in Figure 3 , the inlet 61 is formed in a size that includes the winding region W of the yarn Y on the outer peripheral surface of the guide roller 35 in the axial direction, that is, the front-rear direction. In addition, the "winding region W" refers to the range in which a plurality of yarns Y are wound on the outer peripheral surface of the guide roller. Specifically, for example, the winding region W of the guide roller 35 is the range from the contact point of the yarn Y on the upstream side of the yarn travel direction of the guide roller 35 to the contact point on the downstream side in the outer peripheral surface of the guide roller 35 when viewed in the front-rear direction (refer to Figure 2 ), and is the range from the portion where the foremost yarn Y is wound on the outer peripheral surface of the guide roller 35 to the portion where the rearmost yarn Y is wound on the outer peripheral surface of the guide roller 35 when viewed in the yarn travel direction (refer to Figure 3 ).

[0087] Further, as shown in Figure 2As shown, the inlet 61 opens in a first space region 80A in the interior space of the oven 20 that is in contact with the winding region W of the yarn Y of the outer peripheral surface of the godet 35. Also, the outlet 62 opens in a second space region 80B in the interior space of the oven 20 that is in contact with the winding region W of the yarn Y of the outer peripheral surface of the godet 31. Further, the "first space region 80A" refers to a space in the interior space of the oven 20 that is in contact with the winding region W of the yarn Y of the outer peripheral surface of the godet 35, and is a space that is radially outward of the winding region W of the yarn Y of the outer peripheral surface of the godet 35, and is a space that is closer to the godet 35 than to other godets. Also, the "second space region 80B" refers to a space in the interior space of the oven 20 that is in contact with the winding region W of the yarn Y of the outer peripheral surface of the godet 31, and is a space that is radially outward of the winding region W of the yarn Y of the outer peripheral surface of the godet 31, and is a space that is closer to the godet 31 than to other godets. Also, a portion of the region of the second space region 80B that is downstream of the outlet 62 in the yarn travel direction, and is an air passing area that is defined by the size dl of the gap described above, is smaller than the area of the gap between the outlet 62 and the outer peripheral surface of the godet 31.

[0088] The spinning and drawing device 3 has, as shown Figure 2 a first shield plate 71, a second shield plate 72, and a partition plate 73.

[0089] The first shield plate 71 is provided in the first space region 80A, and is a member that suppresses the amount of air flowing from the guide roller 35 toward the yarn guide outlet 20b, and guides the suppressed air toward the inlet 61. The first shield plate 71 is provided so as to extend from the left side surface 24 toward a portion in the winding region W of the guide roller 35 that is on the downstream side in the yarn travel direction compared to the inlet 61 of the guide path 60. The front end portion of the first shield plate 71 is close to the outer peripheral surface of the guide roller 35. In addition, all of the first shield plate 71 can be provided in the first space region 80A, or a portion thereof can be provided in the first space region 80A. When a portion of the first shield plate 71 is provided in the first space region 80A, for example, the remaining portion of the first shield plate 71 can be provided in a space region that contacts a region of the outer peripheral surface of the guide roller 35 that is on at least either the front end surface side or the rear end surface side of the winding region W compared to the inlet 61 of the guide path 60 when viewed in a direction orthogonal to the axial direction of the guide roller 35. Also, as another example in which a portion of the first shield plate 71 is provided in the first space region 80A, the remaining portion of the first shield plate 71 can be provided in a region on the downstream side in the yarn travel direction compared to the winding region W of the outer peripheral surface of the guide roller 35 when viewed in the axial direction of the guide roller 35. Furthermore, of course, the remaining portion of the first shield plate 71 can be provided in a space region that contacts a region of the outer peripheral surface of the guide roller 35 that is on at least either the front end surface side or the rear end surface side of the winding region W compared to the inlet 61 of the guide path 60 when viewed in a direction orthogonal to the axial direction of the guide roller 35, and in a region on the downstream side in the yarn travel direction compared to the winding region W of the outer peripheral surface of the guide roller 35 when viewed in the axial direction of the guide roller 35.

[0090] The front end portion of the first shield plate 71 is preferably opposed to the outer peripheral surface of the guide roller 35. Thereby, it is possible to more suppress the amount of air flowing along the outer peripheral surface of the guide roller 35 that desires to flow out to the outside of the heat retaining case 20. Also, the front end portion of the first shield plate 71 is preferably located on the upper side compared to the base end portion on the left side surface 24 side. Thereby, it is easy to guide air that is transported from the upstream side to the downstream side in the yarn travel direction by the convection current generated at the outer peripheral surface of the guide roller 35 toward the guide path 60. In the present embodiment, the first shield plate 71 extends toward the outer peripheral surface of the lower semicircular portion of the guide roller 35 when viewed in the front-rear direction. Furthermore, as shown in FIG. 6, the front end portion of the first shield plate 71 is opposed to the outer peripheral surface of the guide roller 35, and the front end portion of the first shield plate 71 is located on the upper side compared to the base end portion. In addition, the gap between the front end portion of the first shield plate 71 and the outer peripheral surface of the guide roller 35 is about 2 mm. Figure 2

[0091] ​The second shielding plate 72 is disposed in the second spatial region 80B and is a component that suppresses the amount of air flowing from the outlet 62 toward the yarn inlet 20a and guides the suppressed air toward the winding area W of the yarn Y on the outer peripheral surface of the guide roller 31. The second shielding plate 72 is disposed relative to the guide roller 31 and extends from the lower right inclined portion 23 toward the portion of the winding area W of the guide roller 31 upstream of the outlet 62 of the guide path 60 in the yarn travel direction. The gap between the front end of the second shielding plate 72 and the outer peripheral surface of the guide roller 31 is approximately 2 mm. Alternatively, the entire second shielding plate 72 may be disposed in the second spatial region 80B, or only a portion of it may be disposed in the second spatial region 80B. When a portion of the second shielding plate 72 is disposed in the second spatial region 80B, for example, the remaining portion of the second shielding plate 72 may be disposed in a spatial region that, when viewed in a direction orthogonal to the axial direction of the guide roller 31, contacts at least one of the regions on the outer peripheral surface of the guide roller 31 that are closer to the front end face of the guide roller 31 and the region on the rear end face of the guide roller 31, compared to the area on the outer peripheral surface of the guide roller 31. Furthermore, as another example of the second shielding plate 72 being disposed in the second spatial region 80B, the remaining portion of the second shielding plate 72 may be disposed in a region on the upstream side of the winding region W of the yarn Y on the outer peripheral surface of the guide roller 31, compared to the area on the outer peripheral surface of the guide roller 31, in the yarn travel direction, when viewed in the axial direction of the guide roller 31. Furthermore, the remaining portion of the second shielding plate 72 may also be provided in a spatial region that contacts at least one of the regions on the outer peripheral surface of the guide roller 31, namely the region on the front end side and the region on the rear end side, when viewed in a direction orthogonal to the axial direction of the guide roller 31, and is provided in a region on the upstream side of the winding region W of the thread Y on the outer peripheral surface of the guide roller 31, relative to the direction of thread travel, when viewed in the axial direction of the guide roller 31.

[0092] A separator plate 73 is disposed between the guide roller 31 and the guide roller 33. The separator plate 73 is a plate-shaped component that protrudes from the back side 26 toward the front surface 27 and extends from the connecting wall 63 of the guide path 60 toward the outer peripheral surface of the guide roller 32. The front end of the separator plate 73 is close to the outer peripheral surface of the guide roller 32.

[0093] Furthermore, in this embodiment, the distance d2 between the front end face of the guide rollers 31-35 supported on one side of the back portion 26 and the inner surface of the door portion, i.e., the front surface portion 27, which can be opened and closed, is (refer to...) Figure 3 (The value is 9mm or less.)

[0094] (Example)

[0095] Next, the power consumption (kW) of the heater accompanying the heating of the yarn Y by the godets 31 to 35 was compared for the spinning and drawing device 3 of the comparative example, Example 1, and Example 2. The comparative example 1 is the spinning and drawing device 3 without the structure of the guide path 60. The Example 1 is the spinning and drawing device 3 in which the guide path 60, the first shielding plate 71, the second shielding plate 72, and the partition plate 73 are provided inside the incubator 20, and is the spinning and drawing device 3 of the above-described embodiment. The Example 2 is the spinning and drawing device 3 in which the guide path 60, the first shielding plate 71, and the partition plate 73 are provided inside the incubator 20, and is the spinning and drawing device 3 of the structure in which the second shielding plate 72 in the above-described embodiment is not provided. The surface temperatures of the respective godets 31 to 35 were the same for the comparative example, Example 1, and Example 2.

[0096] As shown in FIG. 8, the power consumption of the spinning and drawing device 3 of the comparative example was 3.69 kW. In contrast, the power consumption of the spinning and drawing device 3 of Example 1 was 2.87 kW, and the power consumption of the spinning and drawing device 3 of Example 2 was 3.16 kW, and the power consumption was reduced compared to the comparative example. In particular, it was found that the power consumption was more greatly reduced in the spinning and drawing device 3 of Example 1 in which the second shielding plate 72 was provided. Figure 4 (Effects)

[0097] The spinning and drawing device 3 of the present embodiment includes an incubator 20 having a yarn inlet 20a and a yarn outlet 20b, and godets 31 to 35 housed in the incubator 20. The godets 31 to 35 include a godet 31 (first heating roller) disposed at the most upstream side in the yarn travel direction, a godet 35 (second heating roller) disposed at a position downstream of the godet 31 in the yarn travel direction and having a higher temperature and a higher feed speed than the godet 31, and godets 32 to 34 (third heating rollers) disposed between the godet 31 and the godet 35 in the yarn travel direction. Further, the spinning and drawing device 3 includes a guide path 60 for air in the internal space of the incubator 20, an inlet 61 of the guide path 60 being opened at a position closest to the godet 35 among the godets 31 to 35, and an outlet 62 being opened at a position closest to the godet 31 among the godets 31 to 35. The inlet 61 is opened in a manner so as to overlap with a region along the axial direction of the godet 35 when viewed in a direction orthogonal to the axial direction (front-rear direction) of the godet 35, and the outlet 62 is opened in a manner so as to overlap with a region along the axial direction of the godet 31 when viewed in a direction orthogonal to the axial direction (front-rear direction) of the godet 31.

[0098]

[0099] ​The low-temperature air from the outside flows into the portion of the incubator 20 in which the yarn guide roller 31 is arranged through the yarn guide inlet 20a. Also, the low-temperature yarn Y guided from the outside is wound around the yarn guide roller 31. Therefore, in order to maintain the temperature of the yarn guide roller 31, more energy is consumed. On the other hand, the high-temperature air around the yarn guide roller 35 flows out from the yarn guide outlet 20b toward the outside of the incubator 20 by the convection flow generated by the rotation of the roller and the travel of the yarn Y wound around the roller, and becomes a large energy loss. According to the present embodiment, the high-temperature air flowing along the outer circumferential surface of the yarn guide roller 35 and intended to flow out toward the outside of the incubator 20 by the convection flow can be guided toward the guide path 60. Further, the high-temperature air around the yarn guide roller 35 can be guided toward the surroundings of the yarn guide roller 31 using the guide path 60. Thereby, the energy loss due to the outflow of the high-temperature air toward the outside of the incubator 20 can be suppressed, and the temperature of the air around the yarn guide roller 31 can be increased, and the thermal energy can be efficiently used in the incubator 20. Also, the inlet 61 is opened in a manner that overlaps the region along the axial direction of the yarn guide roller 35 when viewed in the direction orthogonal to the axial direction of the yarn guide roller 35, and the outlet 62 is opened in a manner that overlaps the region along the axial direction of the yarn guide roller 31 when viewed in the direction orthogonal to the axial direction of the yarn guide roller 31. Therefore, the high-temperature air around the yarn guide roller 35 is guided toward the guide path 60 in a direction parallel to the travel direction of the yarn Y, and is further transported toward the surroundings of the yarn guide roller 31 in a direction parallel to the travel direction of the yarn Y. Thereby, the yarn swing of the yarn Y wound around the outer circumferential surface of the yarn guide roller 31 and the yarn guide roller 35 in the axial direction (front-rear direction) can be suppressed, and as a result, the quality reduction of the yarn Y can be suppressed.

[0100] Further, in the present embodiment, the inlet 61 opens at a position closer to the godet 35 than the yarn guide outlet 20b, and the outlet 62 opens at a position closer to the godet 31 than the yarn guide inlet 20a. In the vicinity of the inlet 61 and the outlet 62 of the guide path 60, the flow of air is likely to be disturbed. If the inlet 61 of the guide path 60 opens at a position close to the yarn guide outlet 20b, yarn swing of the yarn Y guided out of the yarn guide outlet 20b toward the outside of the incubator 20 is likely to occur. Further, if the outlet 62 of the guide path 60 opens at a position close to the yarn guide inlet, yarn swing of the yarn Y guided into the inside of the incubator 20 from the yarn guide inlet 20a is likely to occur. According to the present embodiment, the inlet 61 of the guide path 60 opens at a position closer to the godet 35 than the yarn guide outlet 20b, and the outlet 62 of the guide path 60 opens at a position closer to the godet 31 than the yarn guide inlet 20a. Therefore, it is possible to suppress the occurrence of yarn swing of the yarn Y guided into the inside of the incubator 20 from the yarn guide inlet 20a and yarn swing of the yarn Y guided out of the yarn guide outlet 20b toward the outside of the incubator 20. Further, if the inlet 61 of the guide path 60 opens at a position close to the yarn guide outlet 20b, there is a concern that a part of the air guided toward the guide path 60 from the inlet 61 of the guide path 60 flows out of the yarn guide outlet 20b toward the outside of the incubator 20 by the accompanying flow generated by the travel of the yarn Y. In the present embodiment, the inlet 61 of the guide path 60 opens at a position closer to the godet 35 than the yarn guide outlet 20b, and therefore it is possible to suppress the case where a part of the air guided toward the guide path 60 from the inlet 61 of the guide path 60 flows out of the yarn guide outlet 20b toward the outside of the incubator 20.

[0101] Further, according to the present embodiment, the entire guide path 60 is provided inside the incubator 20. According to the present embodiment, the air passing through the guide path 60 is incubated inside the incubator 20, and therefore it is possible to further reduce the energy loss of the high-temperature air.

[0102] Further, in the present embodiment, with respect to the guide path 60, in a cross section orthogonal to the direction in which the guide path 60 extends, the guide path 60 is entirely surrounded by the left side surface portion 24, the left lower inclined portion 25, the back surface portion 26, and the connecting wall portion 63. According to the present embodiment, it is possible to prevent the air passing through the guide path 60 from leaking out toward the inside of the incubator 20 midway. Therefore, it is possible to efficiently guide the high-temperature air toward the surroundings of the godet 31, and it is possible to more efficiently utilize the heat energy.

[0103] Further, in the present embodiment, the inlet 61 is formed to have a size of the winding region W of the yarn Y on the outer peripheral surface of the guide roller 35 in the axial direction (front-rear direction) of the guide roller 35 when viewed in a direction orthogonal to the axial direction (front-rear direction) of the guide roller 35. According to the present embodiment, it is easy to homogenize the flow of air in the vicinity of the inlet 61 of the guide path 60 among the plurality of yarns Y. Thereby, it is possible to further suppress the generation of the yarn swing in the vicinity of the inlet 61 of the guide path 60 due to the disorder of the flow of air, and it is possible to suppress the adverse effect on the quality of the yarn Y.

[0104] Further, in the present embodiment, the first shielding plate 71 is provided in the first space region 80A in the internal space of the heat-insulating case 20, which contacts the winding region W of the yarn Y on the outer peripheral surface of the guide roller 35, and suppresses the amount of air from the guide roller 35 toward the yarn guide outlet 20b, and guides the suppressed air toward the inlet 61 of the guide path 60. According to the present embodiment, it is possible to suppress the amount of air flowing along the outer peripheral surface of the guide roller 35 and desiring to flow out to the outside of the heat-insulating case 20. Further, it is possible to more guide the air, which is transported from the upstream side to the downstream side of the yarn travel direction by the convection flow generated on the outer peripheral surface of the guide roller 35, toward the guide path 60. Thereby, it is possible to more efficiently utilize the thermal energy.

[0105] Further, in the present embodiment, the second shielding plate 72 is provided in the second space region 80B in the internal space of the heat-insulating case 20, which contacts the winding region W of the yarn Y on the outer peripheral surface of the guide roller 31, and suppresses the amount of air from the outlet 62 of the guide path 60 toward the yarn guide inlet 20a, and guides the suppressed air toward the winding region of the yarn Y on the outer peripheral surface of the guide roller 31. According to the present embodiment, it is possible to suppress the high-temperature air guided by the guide path 60 from flowing out to the outside of the heat-insulating case from the yarn guide inlet 20a, and further, it is possible to guide the air toward the winding region W of the yarn Y on the outer peripheral surface of the guide roller 31. Thereby, it is possible to further suppress the energy consumption when maintaining the temperature of the guide roller 31, and it is possible to more efficiently utilize the thermal energy.

[0106] Further, in the present embodiment, the partition plate 73 is provided between the guide roller 31 and the guide roller 33. There is air heated in the inside of the heat-insulating case 20 around the guide roller 33, and the yarn Y that has become high-temperature is wound around the guide roller 33. If the high-temperature air guided toward the surroundings of the guide roller 31 by the guide path 60 moves to the surroundings of such a guide roller 33, the guide roller 33 excessively becomes high-temperature, and there is a concern that the quality of the yarn is impaired. According to the present embodiment, it is possible to suppress the situation that the high-temperature air around the guide roller 31 moves toward the surroundings of the guide roller 33 by the partition plate 73. Thereby, it is possible to suppress the guide roller 33 from excessively becoming high-temperature.

[0107] Further, in the present embodiment, the inlet 61 of the guide path 60 is opened in the first space region 80A in the inside space of the heat retaining case 20 which contacts the winding region W of the yarn Y of the outer peripheral surface of the guide roller 35, and the outlet 62 is opened in the second space region 80B in the inside space of the heat retaining case 20 which contacts the winding region W of the yarn Y of the outer peripheral surface of the guide roller 31. In the vicinity of the inlet 61 and the outlet 62 of the guide path 60, the flow of air is easily disturbed. When the inlet 61 and the outlet 62 of the guide path 60 are opened toward the portion of the yarn Y which is transported in the yarn travel direction and which is not wound on the guide roller, there is a concern that the yarn will swing due to the disturbance of the air, and the quality of the yarn Y will be affected. According to the present embodiment, the inlet 61 of the guide path 60 is opened in the first space region 80A, and the outlet 62 is opened in the second space region 80B, so it is possible to further suppress the occurrence of yarn swing.

[0108] Further, in the present embodiment, at least a portion of the region of the second space region 80B which is on the downstream side in the yarn travel direction from the outlet 62 has a narrower air passage area than the gap between the outlet 62 and the outer peripheral surface of the guide roller 31. In the portion where the air passage area is narrow, the flow velocity of the accompanying flow which is generated by the rotation of the guide roller 31 becomes fast. As a result, the pressure (static pressure) decreases, and air is easily guided from the guide path 60 toward the guide roller 31. That is, in the portion where the air passage area is narrow, air is easily introduced. According to the present embodiment, with respect to the air which passes through the guide path 60 and is guided to the vicinity of the guide roller 31, the air is easily introduced into the portion where the air passage area is narrow described above, and thus it is possible to cause more high-temperature air to flow into the guide path 60 from the inlet 61 of the guide path 60, that is, it is possible to guide more high-temperature air toward the vicinity of the guide roller 31. For the above reason, it is possible to more efficiently utilize thermal energy.

[0109] Further, in the present embodiment, the size dl of the gap between the guide path 60 and the outer peripheral surface of the godet 31, which is a portion of the air passing area, is 20 to 40 mm. According to the present embodiment, the size of the gap between the guide path 60 and the outer peripheral surface of the godet 31, which is a value of a portion of the air passing area, can be made as small as possible within a range of a size through which the tip of the suction gun for sucking the yarn Y used when starting the godet 31 can pass. In the portion where the gap is narrow, the flow rate of the convection current generated by the rotation of the godet 31 becomes fast. As a result, the pressure (static pressure) decreases, and air is easily guided from the guide path 60 toward the godet 31. Thus, most of the high-temperature air that passes through the guide path 60 and is guided to the periphery of the godet 31 passes through the above-described gap and is transported toward the downstream side of the yarn travel direction. Therefore, it is possible to suppress the situation in which the high-temperature air guided by the guide path 60 flows out from the yarn guide inlet 20a toward the outside of the heat retaining box 20. Also, air easily flows into the above-described gap, and thus it is possible to make more high-temperature air flow into the guide path 60 from the inlet 61 of the guide path 60, that is, to guide more high-temperature air toward the periphery of the godet 31. For the above reasons, it is possible to more efficiently utilize thermal energy.

[0110] Further, in the present embodiment, the front surface portion 27 of the heat retaining box 20 is a door portion that can be opened and closed, the godets 31 to 35 are supported by the back surface portion 26 on one side, and the distance d2 between the end surface on the front side and the inner surface of the front surface portion 27 is 4 mm or less. If the distance between the end surface on the front side of the godets 31 to 35 and the front surface portion 27 is large, air flows between the end surface on the front side of the godets 31 to 35 and the front surface portion 27, and thus the guidance of high-temperature air by the guide path 60 cannot be efficiently performed. According to the present embodiment, it is difficult for air to enter and exit between the end surface on the front side of the godets 31 to 35 and the front surface portion 27, and thus the guidance of high-temperature air by the guide path 60 can be efficiently performed.

[0111] (Modified Examples)

[0112] The preferred embodiments of the present application have been described above, but the present application is not limited to the above-described examples, and various modifications can be made within the scope of the technical idea described in the claims. Modified examples in which modifications are made to the above-described embodiments will be described below. However, with regard to portions having the same structure as the above-described embodiments, the same reference numerals are assigned and the description thereof is appropriately omitted.

[0113] In the above embodiment, the guide path 60 guides the air around the godet 35 not toward the periphery of the godets 32 to 34 but toward the periphery of the godet 31. However, for example, the air around the godet 34 can be guided not toward the godets 32 and 33 but toward the periphery of the godet 31. In this case, the godet 34, which is disposed on the downstream side in the thread running direction with respect to the godet 31 corresponding to the first heating roller and which has a higher thread feeding speed and a higher temperature than the godet 31, corresponds to the second heating roller. Further, the godets 32 and 33, which are disposed between the godet 31 and the godet 34, correspond to the third heating roller.

[0114] In the above embodiment, the guide path 60 includes a portion of the left side surface portion 24, a portion of the left lower inclined portion 25, a portion of the back surface portion 26, and a connecting wall portion 63 connecting the left side surface portion 24 and the back surface portion 26 and the left lower inclined portion 25 and the back surface portion 26 of the heat-insulating tank 20. Further, in a cross section orthogonal to the direction in which the guide path 60 extends, the guide path 60 is entirely surrounded by the left side surface portion 24 or the left lower inclined portion 25, the back surface portion 26, and the connecting wall portion 63. However, the guide path 60 can be configured to include a portion of the left side surface portion 24, a portion of the left lower inclined portion 25, a portion of the back surface portion 26, a portion of the front surface portion 27, a plate-shaped member extending from the back surface portion 26 toward the front surface portion 27, and a sealing member attached to the front end of the plate-shaped member of the heat-insulating tank 20. The sealing member is disposed in a gap between the plate-shaped member and the front surface portion 27. In this case, in a cross section orthogonal to the direction in which the guide path 60 extends, the guide path 60 is entirely surrounded by the left side surface portion 24 or the left lower inclined portion 25, the back surface portion 26, the front surface portion 27, the plate-shaped member, and the sealing member. Further, in this case, a portion of the inlet 61 is opened in a manner that overlaps with a region along the axial direction of the godet 35 when viewed in a direction orthogonal to the axial direction of the godet 35, and a portion of the outlet 62 is opened in a manner that overlaps with a region along the axial direction of the godet 31 when viewed in a direction orthogonal to the axial direction of the godet 31.

[0115] Further, the sealing member can be attached to the front end of the first shielding plate 71, the second shielding plate 72, the partition plate 73, the rectifying members 41 to 45, and the blocking members 51 to 53. Thus, the gap between each of the first shielding plate 71, the second shielding plate 72, the partition plate 73, the rectifying members 41 to 45, and the blocking members 51 to 53 and the front surface portion 27 in the closed state disappears. In this way, the air that is intended to pass through the gap is shielded, and the flow of the unwanted air current generated in the internal space of the heat-insulating tank 20 can be prevented. In addition, the sealing member can not be attached to all of the front ends of the first shielding plate 71, the second shielding plate 72, the partition plate 73, the rectifying members 41 to 45, and the blocking members 51 to 53, but can be attached to at least one or more of them.

[0116] Also, in a cross section orthogonal to the extending arrangement direction of the guide path 60, the guide path 60 can not be surrounded by the wall portion throughout the circumference. For example, the guide path 60 can be configured to include the left side surface portion 24, the left lower inclined portion 25, the back surface portion 26, and the plate-shaped member protruding from the back surface portion 26 toward the front surface portion 27 of the heat-insulating case 20. In this case, the guide path 60 is formed in a shape in which the front side is not surrounded by the wall portion in the cross section orthogonal to the extending arrangement direction.

[0117] In the above-described embodiment, the guide path 60 is provided in the inside of the heat-insulating case 20, but can be provided outside the heat-insulating case 20. In this case, the guide path 60 is a heat-insulating member and has a pipe shape in which the outer circumference is closed.

[0118] In the above-described embodiment, the size of the gap between the front end portion of the second shielding plate 72 and the outer circumferential surface of the guide wire roller 31 is about 2 mm. However, the size of the gap between the front end portion of the second shielding plate 72 and the outer circumferential surface of the guide wire roller 31 can be larger than about 2 mm. The second shielding plate 72 suppresses the high-temperature air guided to the surroundings of the guide wire roller 31 by the guide path 60 from flowing out from the wire guide inlet 20a toward the outside of the heat-insulating case, and also has the effect of shielding the low-temperature air introduced from the wire guide inlet 20a toward the inside of the heat-insulating case 20. If the front end portion of the second shielding plate 72 is too close to the outer circumferential surface of the guide wire roller 31, the high-temperature air is more likely to accumulate in the inside of the heat-insulating case 20. In this case, there is a concern that the temperature of the air existing in the surroundings of the guide wire rollers 32 to 35 on the downstream side in the wire travel direction from the guide wire roller 31 becomes higher than expected. In this way, there is a concern that the surface temperature of the guide wire rollers 32 to 35 becomes excessively high, which affects the quality of the wire Y. In this case, it is rather desirable to cause the low-temperature air to flow into the inside of the heat-insulating case 20 from the wire guide inlet 20a. Therefore, regarding the distance between the front end portion of the second shielding plate 72 and the outer circumferential surface of the guide wire roller 31, it is preferable to be a value within a range in which the surface temperature of each of the guide wire rollers 32 to 35 does not become excessively high, and the case in which the air guided to the surroundings of the guide wire roller 31 by the guide path 60 flows out toward the outside of the heat-insulating case through the wire guide inlet 20a is suppressed to the greatest extent possible. The size of the gap between the front end portion of the second shielding plate 72 and the outer circumferential surface of the guide wire roller 31 is adjusted, for example, between 2 mm and 35 mm.

[0119] Further, regarding the spinning and drawing device of the present application, in order to adjust the distance between the front end of the second shielding plate 72 and the outer peripheral surface of the godet 31, a second shielding plate driving device that moves the second shielding plate 72 can be provided. In this case, the distance between the front end of the second shielding plate 72 and the outer peripheral surface of the godet 31 is automatically adjusted according to the temperature inside the oven 20 or the surface temperature of each godet, and the like. Thereby, the temperature of the air existing around the godets 32 to 35 at a position on the downstream side of the godet 31 in the yarn travel direction can be prevented from becoming higher than expected.

[0120] Further, in the above-described embodiment, the first shielding plate 71 can also be movable between an approach position that approaches the outer peripheral surface of the godet 35 and a retreat position that is apart from the outer peripheral surface of the godet 35 compared to the approach position. The second shielding plate 72 can also be movable between an approach position that approaches the outer peripheral surface of the godet 31 and a retreat position that is apart from the outer peripheral surface of the godet 31 compared to the approach position. The shut-off members 51 and 52 can also be movable between an approach position that approaches the outer peripheral surface of the godet 34 and a retreat position that is apart from the outer peripheral surface of the godet 34 compared to the approach position. In this case, for example, when the spinning of the yarn Y toward the godet is performed, the first shielding plate 71, the second shielding plate 72, the shut-off members 51 and 52 can be moved toward the retreat positions to temporarily separate each member from the godet 35, and thus the spinning toward the godet becomes easy.

[0121] In the above-described embodiment, none or some of the first shielding plate 71, the second shielding plate 72, and the partition plate 73 can not be provided.

[0122] In the above-described embodiment, a sliding gate can be installed at the inlet 61 of the guide path 60. The area of the inlet 61 is changed by sliding the gate along the inlet 61. Thereby, the flow rate of the air flowing into the guide path 60 can be adjusted. Further, regarding the sliding of the gate, the sliding can be performed manually by an operator or automatically using a gate driving device that moves the gate.

Claims

1. A spinning and stretching device, characterized in that, have: The insulated box has a thread inlet for introducing the thread and a thread outlet for discharging the thread; and Multiple heating rollers are respectively housed in the aforementioned heat preservation box, which heat the yarn and convey the yarn along the yarn travel direction from the yarn inlet to the yarn outlet. The plurality of heating rollers include: a first heating roller disposed on the upstream side of the yarn travel direction; a second heating roller disposed on the downstream side of the first heating roller in the yarn travel direction, and having a faster yarn feeding speed and higher temperature than the first heating roller; and at least one third heating roller disposed between the first heating roller and the second heating roller in the yarn travel direction. The aforementioned spinning and stretching device also includes an air guide path. Inside the aforementioned insulated box, the air guide path has an inlet located closest to the second heating roller among the plurality of heating rollers, and an outlet located closest to the first heating roller among the plurality of heating rollers. Regarding the aforementioned inlet, when viewed in a direction orthogonal to the axial direction of the second heating roller, at least a portion of the inlet opens in a manner that overlaps with a region along the axial direction of the second heating roller, and, Regarding the aforementioned outlet, when viewed in a direction orthogonal to the axial direction of the aforementioned first heating roller, at least a portion of the aforementioned outlet opens in a manner that overlaps with the region along the axial direction of the aforementioned first heating roller.

2. The spinning and stretching apparatus according to claim 1, characterized in that, The aforementioned inlet opens closer to the aforementioned second heating roller than the aforementioned thread outlet, and the aforementioned outlet opens closer to the aforementioned first heating roller than the aforementioned thread inlet.

3. The spinning and stretching apparatus according to claim 1, characterized in that, The aforementioned guide path is entirely housed inside the aforementioned insulated box.

4. The spinning and stretching apparatus according to claim 2, characterized in that, The aforementioned guide path is entirely housed inside the aforementioned insulated box.

5. The spinning and stretching apparatus according to claim 1, characterized in that, In a cross-section orthogonal to the direction of extension of the aforementioned guide path, the entire circumference of the guide path is surrounded by the wall portion.

6. The spinning and stretching apparatus according to claim 2, characterized in that, In a cross-section orthogonal to the direction of extension of the aforementioned guide path, the entire circumference of the guide path is surrounded by the wall portion.

7. The spinning and stretching apparatus according to claim 3, characterized in that, In a cross-section orthogonal to the direction of extension of the aforementioned guide path, the entire circumference of the guide path is surrounded by the wall portion.

8. The spinning and stretching apparatus according to claim 4, characterized in that, In a cross-section orthogonal to the direction of extension of the aforementioned guide path, the entire circumference of the guide path is surrounded by the wall portion.

9. The spinning and stretching apparatus according to claim 1, characterized in that, The aforementioned inlet is formed such that, when viewed in a direction orthogonal to the axial direction of the aforementioned second heating roller, it includes the size of the filament winding area on the outer peripheral surface of the aforementioned second heating roller in the axial direction of the aforementioned second heating roller.

10. The spinning and stretching apparatus according to claim 2, characterized in that, The aforementioned inlet is formed such that, when viewed in a direction orthogonal to the axial direction of the aforementioned second heating roller, it includes the size of the filament winding area on the outer peripheral surface of the aforementioned second heating roller in the axial direction of the aforementioned second heating roller.

11. The spinning and stretching apparatus according to claim 3, characterized in that, The aforementioned inlet is formed such that, when viewed in a direction orthogonal to the axial direction of the aforementioned second heating roller, it includes the size of the filament winding area on the outer peripheral surface of the aforementioned second heating roller in the axial direction of the aforementioned second heating roller.

12. The spinning and stretching apparatus according to claim 4, characterized in that, The aforementioned inlet is formed such that, when viewed in a direction orthogonal to the axial direction of the aforementioned second heating roller, it includes the size of the filament winding area on the outer peripheral surface of the aforementioned second heating roller in the axial direction of the aforementioned second heating roller.

13. The spinning and stretching apparatus according to claim 5, characterized in that, The aforementioned inlet is formed such that, when viewed in a direction orthogonal to the axial direction of the aforementioned second heating roller, it includes the size of the filament winding area on the outer peripheral surface of the aforementioned second heating roller in the axial direction of the aforementioned second heating roller.

14. The spinning and stretching apparatus according to claim 6, characterized in that, The aforementioned inlet is formed such that, when viewed in a direction orthogonal to the axial direction of the aforementioned second heating roller, it includes the size of the filament winding area on the outer peripheral surface of the aforementioned second heating roller in the axial direction of the aforementioned second heating roller.

15. The spinning and stretching apparatus according to claim 7, characterized in that, The aforementioned inlet is formed such that, when viewed in a direction orthogonal to the axial direction of the aforementioned second heating roller, it includes the size of the filament winding area on the outer peripheral surface of the aforementioned second heating roller in the axial direction of the aforementioned second heating roller.

16. The spinning and stretching apparatus according to claim 8, characterized in that, The aforementioned inlet is formed such that, when viewed in a direction orthogonal to the axial direction of the aforementioned second heating roller, it includes the size of the filament winding area on the outer peripheral surface of the aforementioned second heating roller in the axial direction of the aforementioned second heating roller.

17. The spinning and stretching apparatus according to claim 9, characterized in that, It also includes a first shielding plate, which is disposed in a first space region in the internal space of the heat preservation box that contacts the winding area of ​​the filament on the outer peripheral surface of the second heating roller, suppressing the amount of air from the second heating roller toward the filament outlet and guiding the suppressed air toward the inlet.

18. The spinning and stretching apparatus according to claim 10, characterized in that, It also includes a first shielding plate, which is disposed in a first space region in the internal space of the heat preservation box that contacts the winding area of ​​the filament on the outer peripheral surface of the second heating roller, suppressing the amount of air from the second heating roller toward the filament outlet and guiding the suppressed air toward the inlet.

19. The spinning and stretching apparatus according to claim 11, characterized in that, It also includes a first shielding plate, which is disposed in a first space region in the internal space of the heat preservation box that contacts the winding area of ​​the filament on the outer peripheral surface of the second heating roller, suppressing the amount of air from the second heating roller toward the filament outlet and guiding the suppressed air toward the inlet.

20. The spinning and stretching apparatus according to claim 12, characterized in that, It also includes a first shielding plate, which is disposed in a first space region in the internal space of the heat preservation box that contacts the winding area of ​​the filament on the outer peripheral surface of the second heating roller, suppressing the amount of air from the second heating roller toward the filament outlet and guiding the suppressed air toward the inlet.

21. The spinning and stretching apparatus according to claim 13, characterized in that, It also includes a first shielding plate, which is disposed in a first space region in the internal space of the heat preservation box that contacts the winding area of ​​the filament on the outer peripheral surface of the second heating roller, suppressing the amount of air from the second heating roller toward the filament outlet and guiding the suppressed air toward the inlet.

22. The spinning and stretching apparatus according to claim 14, characterized in that, It also includes a first shielding plate, which is disposed in a first space region in the internal space of the heat preservation box that contacts the winding area of ​​the filament on the outer peripheral surface of the second heating roller, suppressing the amount of air from the second heating roller toward the filament outlet and guiding the suppressed air toward the inlet.

23. The spinning and stretching apparatus according to claim 15, characterized in that, It also includes a first shielding plate, which is disposed in a first space region in the internal space of the heat preservation box that contacts the winding area of ​​the filament on the outer peripheral surface of the second heating roller, suppressing the amount of air from the second heating roller toward the filament outlet and guiding the suppressed air toward the inlet.

24. The spinning and stretching apparatus according to claim 16, characterized in that, It also includes a first shielding plate, which is disposed in a first space region in the internal space of the heat preservation box that contacts the winding area of ​​the filament on the outer peripheral surface of the second heating roller, suppressing the amount of air from the second heating roller toward the filament outlet and guiding the suppressed air toward the inlet.

25. The spinning and stretching apparatus according to any one of claims 1 to 24, characterized in that, It also includes a second shielding plate, which is disposed in a second space region inside the heat preservation box that contacts the winding area of ​​the yarn on the outer peripheral surface of the first heating roller. The second shielding plate suppresses the amount of air from the outlet toward the yarn inlet and guides the suppressed air toward the winding area of ​​the yarn on the outer peripheral surface of the first heating roller.

26. The spinning and stretching apparatus according to any one of claims 1 to 24, characterized in that, It also includes a partition plate disposed between the first heating roller and the third heating roller.

27. The spinning and stretching apparatus according to claim 25, characterized in that, It also includes a partition plate disposed between the first heating roller and the third heating roller.

28. The spinning and stretching apparatus according to claim 25, characterized in that, The aforementioned inlet opens in the first space region within the interior space of the aforementioned insulated box, in contact with the area where the yarn is wound on the outer peripheral surface of the aforementioned second heating roller. The aforementioned exit opens in the aforementioned second spatial region.

29. The spinning and stretching apparatus according to claim 28, characterized in that, The air passage area of ​​at least a portion of the area downstream of the outlet in the direction of the thread travel is narrower than the area of ​​the gap between the outlet and the outer peripheral surface of the first heating roller.

30. The spinning and stretching apparatus according to claim 29, characterized in that, The size of the gap between the guide path and the outer peripheral surface of the first heating roller, which is part of the air passage area, is specified to be 20 to 40 mm.

31. The spinning and stretching apparatus according to any one of claims 1 to 24, characterized in that, The wall surface on one side of the axial direction of the aforementioned plurality of heating rollers in the heat preservation box is a door. The aforementioned plurality of heating rollers are supported on one side by the wall on the other side of the axial direction of the plurality of heating rollers, and the distance between the end face of the aforementioned side and the inner surface of the aforementioned door portion is 9 mm or less.

32. The spinning and stretching apparatus according to claim 25, characterized in that, The wall surface on one side of the axial direction of the aforementioned plurality of heating rollers in the heat preservation box is a door. The aforementioned plurality of heating rollers are supported on one side by the wall on the other side of the axial direction of the plurality of heating rollers, and the distance between the end face of the aforementioned side and the inner surface of the aforementioned door portion is 9 mm or less.

33. The spinning and stretching apparatus according to claim 26, characterized in that, The wall surface on one side of the axial direction of the aforementioned plurality of heating rollers in the heat preservation box is a door. The aforementioned plurality of heating rollers are supported on one side by the wall on the other side of the axial direction of the plurality of heating rollers, and the distance between the end face of the aforementioned side and the inner surface of the aforementioned door portion is 9 mm or less.

34. The spinning and stretching apparatus according to claim 27, characterized in that, The wall surface on one side of the axial direction of the aforementioned plurality of heating rollers in the heat preservation box is a door. The aforementioned plurality of heating rollers are supported on one side by the wall on the other side of the axial direction of the plurality of heating rollers, and the distance between the end face of the aforementioned side and the inner surface of the aforementioned door portion is 9 mm or less.

35. The spinning and stretching apparatus according to claim 28, characterized in that, The wall surface on one side of the axial direction of the aforementioned plurality of heating rollers in the heat preservation box is a door. The aforementioned plurality of heating rollers are supported on one side by the wall on the other side of the axial direction of the plurality of heating rollers, and the distance between the end face of the aforementioned side and the inner surface of the aforementioned door portion is 9 mm or less.

36. The spinning and stretching apparatus according to claim 29, characterized in that, The wall surface on one side of the axial direction of the aforementioned plurality of heating rollers in the heat preservation box is a door. The aforementioned plurality of heating rollers are supported on one side by the wall on the other side of the axial direction of the plurality of heating rollers, and the distance between the end face of the aforementioned side and the inner surface of the aforementioned door portion is 9 mm or less.

37. The spinning and stretching apparatus according to claim 30, characterized in that, The wall surface on one side of the axial direction of the aforementioned plurality of heating rollers in the heat preservation box is a door. The aforementioned plurality of heating rollers are supported on one side by the wall on the other side of the axial direction of the plurality of heating rollers, and the distance between the end face of the aforementioned side and the inner surface of the aforementioned door portion is 9 mm or less.

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