Yarn heater and false twister

Abstract

To reduce power consumption without enlarging a device.SOLUTION: A heater has a heating part 50 on which a yarn travel groove 56 extending along an extension direction is formed so that the heating part heats a yarn Y travelling along the yarn travel groove 56, a box 60 to store the heating part 50, a plurality of plate members 71, 72, 73, 74, a first sealing member 82, and a second sealing member 83. The plate members 71, 72, 73, 74 and a body part 61 of the box 60 are aligned so as to face each other and be spaced away from each other, and aligned in a direction going away from the heating part 50 at a virtual plane orthogonal to the extension direction and crossing the heating part 50. The first sealing member 82 and the second sealing member 83 seal ends of inter-plate spaces 75 between two facing plate members and between the plate member 74 and the body part 61. A plurality of air layers formed in the inter-plate space 75 are aligned in a direction going away from the heating part 50 on the virtual plane orthogonal to the extension direction and crossing the heating part 50.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a yarn heating device that heats yarn and a false twisting machine including the yarn heating device. [Background technology]

[0002] A yarn heating device that heats a traveling yarn in a processing machine that performs various processes such as yarn doubling and false twisting on a yarn made of synthetic fibers has been conventionally known. The false twisting machine disclosed in Patent Document 1 is provided with a primary heating unit (yarn heating device) including a box (insulation box), a heating device (heating section) accommodated in the storage space of the box, and a heat insulating material arranged to fill a gap in the storage space in which the heating device is accommodated. A yarn running groove is formed in the heating device, and the yarn traveling in the yarn running groove is heated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-056494 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the yarn heating device as described above, it is desirable to reduce the power consumption. One possible method for reducing the power consumption is to increase the thickness of the insulating material to reduce the amount of heat released from the heating unit to the outside. However, increasing the thickness of the insulating material causes a problem in that the yarn heating device becomes larger.

[0005] An object of the present invention is to provide a yarn heating device capable of reducing power consumption without increasing the size of the device, and a false twisting machine including the yarn heating device. [Means for solving the problem]

[0006] A yarn heating device according to a first aspect of the present invention is a yarn heating device having a yarn travel passage formed therein through which a yarn travels, the yarn travel passage extending in a predetermined direction which is a direction in which the yarn travel passage extends, the yarn heating device comprising: a heating section for heating the yarn traveling through the yarn travel passage; a plurality of plate members arranged opposite to each other and spaced apart from each other, the plurality of plate members arranged in a direction away from the heating section in a virtual plane perpendicular to the predetermined direction and intersecting with the heating section; and a sealing member for sealing at least a part of an end portion of an inter-plate space between two opposing plate members, and a plurality of air layers formed in the inter-plate space are arranged in a direction away from the heating section in the virtual plane.

[0007] Here, "the end of the inter-plate space between two opposing plate members" means the boundary of the inter-plate space, that is, the part of the inter-plate space that is not defined by the two opposing plate members.

[0008] In the present invention, the multiple air layers arranged in a virtual plane in a direction away from the heating unit can suppress the release of heat from the heating unit to the outside. In addition, since the air layers have a relatively small thermal conductivity, they can exhibit sufficient heat insulating performance even if they are small in thickness. Furthermore, since at least a part of the end of the inter-plate space is sealed with a sealing member, the flow of air in and out between the inside and outside of the inter-plate space can be suppressed. This makes it possible to suppress the occurrence of convection in the air layer. Therefore, it is possible to make it difficult for heat to move between the two plate members that form the inter-plate space, and to further improve the heat insulating performance of the air layer. Therefore, it is possible to reduce power consumption without increasing the size of the device.

[0009] The yarn heating device according to a second aspect of the present invention is the yarn heating device according to the first aspect of the present invention, wherein the space between the plates is sealed.

[0010] In the present invention, since the inter-plate space is sealed, it is possible to reliably prevent air from entering and exiting between the inside and outside of the inter-plate space, thereby further improving the heat insulating performance of the air layer.

[0011] In a third aspect of the present invention, in the yarn heating device according to the first or second aspect of the present invention, each of the plate members extends along the predetermined direction, and the sealing member includes a first sealing member that is made of a thermal insulating material and seals both ends of the space between the plates in the predetermined direction.

[0012] In the present invention, by sealing both ends of the inter-plate space in a predetermined direction with the first sealing member, it is possible to suppress the inflow and outflow of air from both ends. In addition, since the first sealing member that seals both ends of the inter-plate space in a predetermined direction is made of a heat insulating material, it is possible to suppress the transfer of heat between adjacent plate members via the first sealing member. This makes it possible to further improve the heat insulating performance by the air layer.

[0013] In the yarn heating device according to the fourth aspect of the present invention, in the first aspect, the first sealing member has a density of 80 kg / m 3 That's all.

[0014] In the present invention, by making the first sealing member high density, it is possible to more reliably prevent air from passing through the first sealing member between the inside and outside of the inter-plate space, and therefore it is possible to more reliably seal the inter-plate space.

[0015] The yarn heating device according to a fifth aspect of the present invention is any one of the first to fourth aspects of the present invention, further comprising spacer members disposed in the spaces between the plates.

[0016] If the thickness of the inter-plate space is not uniform, convection is likely to occur in the air layer formed in the inter-plate space due to the temperature difference that occurs in the inter-plate space. In the present invention, the thickness of the inter-plate space can be made uniform by disposing a spacer member in the inter-plate space. Therefore, the occurrence of convection in the air layer is suppressed, and the heat insulation performance of the air layer can be further improved.

[0017] The yarn heating device according to a sixth aspect of the present invention is based on the fifth aspect of the present invention, and the spacer members respectively disposed in two adjacent inter-plate spaces are disposed at different positions in the predetermined direction.

[0018] When the spacer members disposed in two adjacent inter-plate spaces are disposed at the same position in a predetermined direction, heat is likely to transfer between the plate members via these two spacer members. In the present invention, heat transfer between the plate members via the two spacer members is made difficult, and the heat insulating performance due to the air layer can be further improved.

[0019] In the yarn heating device of the seventh invention, in the fifth or sixth invention, one end of at least one of the inter-plate spaces in an orthogonal direction perpendicular to the predetermined direction is sealed by a folded portion formed by folding one end of the two plate members constituting the inter-plate space in the orthogonal direction, and in two adjacent inter-plate spaces, the folded portion sealing one of the inter-plate spaces and the spacer member arranged in the other inter-plate space are arranged at different positions in the orthogonal direction.

[0020] In the present invention, the space between the plates is sealed by the bent portion, which is a part of the plate member, so that the space between the plates can be sealed. Also, the bent portion and the spacer member make it difficult for heat to move between the plate members, and the heat insulation performance due to the air layer can be further improved.

[0021] In the yarn heating device according to an eighth aspect of the present invention, in the seventh aspect, the bent portion functions as a spacer that ensures a gap between the two plate members.

[0022] In the present invention, the bent portion allows the thickness of the space between the plates to be uniform.

[0023] A ninth aspect of the present invention is the yarn heating device according to the seventh or eighth aspect of the present invention, wherein when three adjacent plate members among the plurality of plate members are a first plate member, a second plate member and a third plate member, the end portions on one side in the orthogonal direction in the inter-plate space between the first plate member and the second plate member are sealed by the bent portions formed by bending the end portions on one side in the orthogonal direction of the first plate member and the second plate member. The sealing member is made of a heat insulating material and includes a second sealing member that seals the end portions on one side in the orthogonal direction in the inter-plate space between the second plate member and the third plate member.

[0024] When adjacent inter-plate spaces (i.e., the inter-plate space between the first plate member and the second plate member and the inter-plate space between the second plate member and the third plate member) are all sealed with bent portions, heat is transferred between the multiple plate members one after another via the bent portions that seal each inter-plate space. In the present invention, the inter-plate space between the second plate member and the third plate member is sealed with a second sealing member made of a heat insulating material. This makes it possible to prevent heat transferred between the first plate member and the second plate member via the bent portions of the plate members from being transferred to the third plate member. This makes it possible to further improve the heat insulating performance provided by the air layer while maintaining the airtightness of each inter-plate space.

[0025] In the yarn heating device of the tenth invention, in the ninth invention, when two of the three adjacent inter-plate spaces, the inter-plate space located closest to the heating unit and the inter-plate space located farthest from the heating unit, are sealed by the bent portions, the bent portions that respectively seal the two inter-plate spaces are located at different positions in the orthogonal direction.

[0026] If the bent parts sealing the two inter-plate spaces are located at the same position in the orthogonal direction, there is a risk of heat transferring between the different plate members via these two bent parts. In the present invention, heat is less likely to transfer between the different plate members via the two bent parts, and the heat insulating performance due to the air layer can be further improved.

[0027] The yarn heating device of the eleventh invention is the ninth or tenth invention, further comprising a covering member made of a heat insulating material and covering a surface opposite to the inter-plate space side of the bent portion that seals at least the inter-plate space that is located closest to the heating portion among the inter-plate spaces sealed by the bent portion.

[0028] In the present invention, the covering member can suppress the release of heat from the bent portion. In particular, the covering member can reliably suppress the release of heat from the bent portion of the plate member that is located near the heating portion and becomes hot.

[0029] A twelfth aspect of the present invention provides the yarn heating device according to the eleventh aspect, wherein the second sealing member also serves as the covering member.

[0030] In the present invention, the configuration of the yarn heating device can be simplified as compared with the case where the covering member is a separate member from the second sealing member.

[0031] The yarn heating device of the 13th invention is the 12th invention, wherein the second sealing member seals one end portion in the orthogonal direction of all inter-plate spaces not sealed by the bent portion, and covers a surface of the bent portion opposite to the inter-plate space side of all inter-plate spaces sealed by the bent portion.

[0032] In the present invention, a configuration can be realized in which a single second sealing member can maintain airtightness in all inter-plate spaces while further improving the heat insulating performance provided by the air layer.

[0033] In the yarn heating device of the 14th invention, in the 12th or 13th invention, each of the plate members covers the entire heating section in the orthogonal direction, and a first folding section which is the folding section sealing the inter-plate space located closest to the heating section among the inter-plate spaces sealed by the folding sections is located closer to the heating section in the orthogonal direction than a second folding section which is the folding section sealing the other inter-plate spaces, and the thickness of the portion of the second sealing member covering the first folding section in the orthogonal direction is greater than the thickness of the portion of the second sealing member covering the second folding section in the orthogonal direction.

[0034] In the present invention, the first bent portion is located near the heating portion in the orthogonal direction, and thus it is possible to reliably prevent heat from being released from the first bent portion, which becomes hot.

[0035] The yarn heating device of the 15th invention is any of the 9th to 14th inventions, further comprising a connecting member connecting the plate members to each other, wherein the first plate member and the second plate member are fixed to each other at the bending portion, and the second plate member and the third plate member are fixed to each other by the connecting member at an end portion on the other side opposite to the one side in the orthogonal direction.

[0036] In the present invention, the layer thickness between the first plate member and the second plate member can be maintained by the bent portion at which the first plate member and the second plate member are fixed. The layer thickness between the second plate member and the third plate member can be maintained by the connecting member that fixes the second plate member and the third plate member. Here, when the fixing portion between the first plate member and the second plate member and the fixing portion between the second plate member and the third plate member are arranged close to each other, heat is likely to move between the first plate member and the third plate member through these two fixing portions. In the present invention, the fixing portion between the first plate member and the second plate member (the portion where the bent portion is formed) and the fixing portion between the second plate member and the third plate member (the portion connected by the connecting member) can be separated in the orthogonal direction. Therefore, it is possible to make it difficult for heat to move between the first plate member and the third plate member through the two fixing portions, and to further improve the heat insulating performance by the air layer.

[0037] In the yarn heating device of the 16th invention, in any one of the first to eighth inventions, the sealing member is made of a heat insulating material and includes a second sealing member that seals one end of the inter-plate space in a perpendicular direction perpendicular to the specified direction.

[0038] In the present invention, by sealing one end of the inter-plate space in the orthogonal direction with the second sealing member, it is possible to suppress the inflow and outflow of air from the end. In addition, since the second sealing member is made of a heat insulating material, it is possible to suppress the transfer of heat between adjacent plate members via the second sealing member. This makes it possible to further improve the heat insulating performance by the air layer.

[0039] In a yarn heating device according to a seventeenth aspect of the present invention, in any one of the ninth to sixteenth aspects, the second sealing member has a density of 80 kg / m 3 That's all.

[0040] In the present invention, by making the second sealing member high density, it is possible to more reliably prevent air from passing through the second sealing member between the inside and outside of the inter-plate space, and therefore it is possible to more reliably seal the inter-plate space.

[0041] The yarn heating device according to an eighteenth aspect of the present invention is any one of the first to seventeenth aspects, wherein the air layer has a thickness of 5 mm or more and less than 15 mm.

[0042] If the thickness of the air layer is large, convection is likely to occur. When convection occurs in the air layer, heat is likely to transfer between the two plate members that form the inter-plate space in which the air layer is formed. On the other hand, if the thickness of the air layer is small, there is a risk that adjacent plate members may come into contact with each other. In that case, heat transfer occurs between the adjacent plate members through the contact area. According to the present invention, the thickness of the air layer can be set to a size that can suppress the occurrence of convection in the air layer, while also being large enough to prevent the plate members from coming into contact with each other. This can further improve the heat insulating performance provided by the air layer.

[0043] The yarn heating device of a 19th invention is any of the 1st to 18th inventions, further comprising an insulating member arranged between the heating unit and the plate member among the plurality of plate members that is arranged closest to the heating unit.

[0044] The surface of the heating part has exposed bolts and the like for fixing the various components constituting the heating part, and the surface is uneven. Therefore, it is difficult to form an air layer with a uniform thickness and high thermal insulation performance between the surface of the heating part and the plate member. In the present invention, by disposing a thermal insulation member between the heating part and the plate member, it is possible to further suppress the release of heat from the heating part to the outside.

[0045] In the yarn heating device of the 20th invention, in any one of the first to nineteenth inventions, the yarn traveling passage is a yarn traveling groove at least a portion of which is defined by the heating section and which is open in an opening direction perpendicular to the predetermined direction.

[0046] In the present invention, the yarn can be heated efficiently.

[0047] A yarn heating device according to a twenty-first aspect of the present invention is the twentieth aspect of the present invention, wherein the plurality of plate members are not arranged in an area facing an open end of the yarn running groove in the opening direction.

[0048] In the present invention, it is possible to leave open a region opposite the open end of the yarn traveling groove, through which the yarn passes when the yarn is inserted into the yarn traveling groove.

[0049] In the yarn heating device of the 22nd invention, in the invention of claim 21, each of the plate members extends along the predetermined direction and is groove-shaped opening in the opening direction, and the multiple plate members are arranged in a nested manner, with the innermost plate member being arranged to surround the heating section.

[0050] In the present invention, the heating part can be surrounded by an air layer formed in the space between two adjacent plate members while leaving an area through which the yarn passes when the yarn is inserted into the yarn running groove, thereby effectively suppressing the release of heat from the heating part to the outside.

[0051] In the yarn heating device of the 23rd invention, in any one of the first to 22nd inventions, of the opposing surfaces of the two plate members constituting the inter-plate space located closest to the heating section among the multiple inter-plate spaces, at least the surface of the plate member closest to the heating section is mirror-finished.

[0052] In the present invention, the mirror-finished surface of the plate member can suppress radiant heat from the heating section. Therefore, heat transfer by radiation can be suppressed and power consumption can be further reduced. In addition, mirror-finishing the surfaces of many plate members increases costs. In the present invention, by mirror-finishing the surface that defines the inter-plate space located closest to the heating section, it is possible to suppress the radiant heat from the heating section most effectively while suppressing increases in costs. Furthermore, dirt is easily noticeable on a mirror-finished surface. In the present invention, since the surface that defines the inter-plate space that cannot be seen from the outside is mirror-finished, dirt attached to the mirror surface is less noticeable.

[0053] A false twisting machine according to a twenty-fourth aspect of the present invention is a false twisting machine that applies false twisting to yarn, and includes the yarn heating device according to any one of the first to twenty-third aspects of the present invention.

[0054] According to the present invention, power consumption can be reduced without increasing the size of the yarn heating device. [Brief description of the drawings]

[0055] [Figure 1] 1 is a side view of a false twisting machine according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing a false twisting machine deployed along a yarn path. [Diagram 3] FIG. 2 is a diagram showing a first heating device. [Figure 4] 4 is a cross-sectional view taken along line IV-IV of the first heating device shown in FIG. 3. [Diagram 5] 5(a) is an enlarged view of the heating part shown in FIG. 4, and (b) is a cross-sectional view taken along line bb of the heating part shown in (a). [Figure 6] 6 is a cross-sectional view taken along line VI-VI of the first heating device shown in FIG. 4. [Figure 7] 7 is a cross-sectional view taken along line VII-VII of the first heating device shown in FIG. 4. [Figure 8] FIG. 4 is a diagram for explaining dimensions and is a cross-sectional view taken along line IV-IV of the first heating device shown in FIG. 3. [Figure 9] FIG. 13 is a diagram for explaining a modified example of the embodiment, and is a cross-sectional view of the second heating device taken along a plane perpendicular to the up-down direction. [Figure 10] FIG. 10 is a cross-sectional view taken along line XX in FIG. [Figure 11] 10(a) is an enlarged view of the heating part shown in FIG. 9, and (b) is a cross-sectional view taken along line bb in (a). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0056] A false twisting machine 1 according to a preferred embodiment of the present invention will be described with reference to Fig. 1. The direction perpendicular to the plane of the paper in Fig. 1 is the machine base longitudinal direction, and the left-right direction of the paper is the machine base width direction. The direction perpendicular to both the machine base longitudinal direction and the machine base width direction is the up-down direction in which gravity acts. The machine base longitudinal direction and the machine base width direction are approximately parallel to the horizontal direction.

[0057] (Overall configuration of false twisting machine 1) The false twisting machine 1 is configured to be capable of false twisting a yarn Y made of a synthetic fiber such as nylon (a polyamide fiber) or polyester. The false twisting machine 1 includes a yarn supplying section 2 for supplying the yarn Y, a processing section 3 for false twisting the yarn Y supplied from the yarn supplying section 2, and a winding section 4 for winding the yarn Y processed by the processing section 3 onto a winding bobbin Bw. A plurality of components of the yarn supplying section 2, the processing section 3, and the winding section 4 are arranged in the longitudinal direction of the machine (see FIG. 2). The longitudinal direction of the machine is a direction perpendicular to the running plane of the yarn Y (the plane of the paper in FIG. 1) formed by the yarn path from the yarn supplying section 2 through the processing section 3 to the winding section 4.

[0058] The yarn supplying section 2 has a creel stand 5 that holds a plurality of yarn supply packages Ps. The yarn supplying section 2 supplies a plurality of yarns Y to the processing section 3. The processing section 3 false-twists the yarn Y supplied from the yarn supply package Ps. The processing section 3 is configured to include, in order from the upstream side in the yarn running direction, a first feed roller 11, a twist stop guide 12, a first heating device 13 (corresponding to the "yarn heating device" of the present invention), a cooling device 14, a false-twist device 15, a second feed roller 16, an intertwining device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20. The winding section 4 has a plurality of winding devices 21. Each winding device 21 winds the yarn Y false-twisted in the processing section 3 onto a winding bobbin Bw to form a winding package Pw.

[0059] The false twisting machine 1 has a main machine base 8 and a winding table 9 arranged at an interval in the width direction of the machine base. The main machine base 8 and the winding table 9 extend to approximately the same length in the longitudinal direction of the machine base. The main machine base 8 and the winding table 9 are arranged to face each other in the width direction of the machine base. The upper part of the main machine base 8 and the upper part of the winding table 9 are connected by a support frame 10. Each device constituting the processing section 3 is mainly attached to the main machine base 8 and the support frame 10. Each device constituting the winding section 4 is attached to the winding table 9. The main machine base 8, the winding table 9, and the support frame 10 form a working space A where an operator can perform work such as threading on each device. The yarn path is formed so that the yarn Y mainly runs around the working space A.

[0060] The false twisting machine 1 has a unit called a span, which includes a pair of a main machine base 8 and a winding base 9 arranged opposite each other. In one span, a plurality of processing units (also called spindles), in which a yarn path is formed so as to pass through each device constituting the processing section 3, are arranged side by side in the longitudinal direction of the machine base. This allows one span to simultaneously perform false twisting on a plurality of yarns Y running side by side in the longitudinal direction of the machine base. In the false twisting machine 1, the spans are arranged symmetrically on the left and right sides of the page, with the center line C of the main machine base 8 in the width direction of the machine base as the axis of symmetry. The main machine base 8 is common to the left and right spans.

[0061] (Configuration of processing part) The configuration of the processing unit 3 will be described with reference to Figs. 1 and 2. The first feed roller 11 is configured to unwind the yarn Y from the yarn supplying package Ps attached to the yarn supplying unit 2 and send it to the first heating device 13. For example, as shown in Fig. 2, the first feed roller 11 is configured to send one yarn Y to the first heating device 13. The first feed roller 11 may be configured to send each of adjacent yarns Y downstream in the yarn running direction. The twist stop guide 12 is configured to prevent the twist imparted to the yarn Y by the false twist device 15 from propagating upstream of the twist stop guide 12 in the yarn running direction.

[0062] The first heating device 13 is a device for heating the yarn Y fed from the first feed roller 11 to a predetermined processing temperature. The first heating device 13 is configured to be capable of heating two yarns Y, for example, as shown in Fig. 2. The first heating device 13 will be described in more detail later.

[0063] The cooling device 14 is configured to cool the yarn Y heated by the first heating device 13. The cooling device 14 is configured to cool one yarn Y, for example, as shown in Fig. 2. The cooling device 14 may be configured to be capable of cooling a plurality of yarns Y simultaneously.

[0064] The false twist device 15 is disposed downstream in the yarn running direction of the cooling device 14. The false twist device 15 is configured to impart a twist to the yarn Y. The false twist device 15 is, for example, a so-called disk friction type false twist device, but is not limited to this.

[0065] The second feed roller 16 is configured to feed the yarn Y processed by the false twist device 15 to the entangling device 17. The conveying speed of the yarn Y by the second feed roller 16 is faster than the conveying speed of the yarn Y by the first feed roller 11. As a result, the yarn Y is stretch-false-twisted between the first feed roller 11 and the second feed roller 16.

[0066] The interlacing device 17 is configured to interlace the yarn Y. The interlacing device 17 has, for example, a known interlace nozzle that interlaces the yarn Y by air flow.

[0067] The third feed roller 18 is configured to send the yarn Y traveling downstream of the intertwining device 17 in the yarn traveling direction to the second heating device 19. For example, as shown in FIG. 2, the third feed roller 18 is configured to send one yarn Y to the second heating device 19. The third feed roller 18 may be configured to send each of adjacent yarns Y downstream in the yarn traveling direction. The conveying speed of the yarn Y by the third feed roller 18 is slower than the conveying speed of the yarn Y by the second feed roller 16. Therefore, the yarn Y is relaxed between the second feed roller 16 and the third feed roller 18.

[0068] The second heating device 19 is configured to heat the yarn Y fed from the third feed roller 18. The second heating devices 19 extend in the vertical direction, and one is provided for each span.

[0069] The fourth feed roller 20 is configured to feed the yarn Y heated by the second heating device 19 to the winding device 21. The fourth feed roller 20 is configured to be able to feed one yarn Y to the winding device 21, for example, as shown in FIG. 2. The fourth feed roller 20 may be configured to be able to feed adjacent yarns Y each downstream in the yarn running direction. The conveying speed of the yarn Y by the fourth feed roller 20 is slower than the conveying speed of the yarn Y by the third feed roller 18. Therefore, the yarn Y is relaxed between the third feed roller 18 and the fourth feed roller 20.

[0070] In the processing section 3 configured as above, the yarn Y drawn between the first feed roller 11 and the second feed roller 16 is twisted by the false twist device 15. The twist formed by the false twist device 15 propagates to the twist stop guide 12, but does not propagate upstream of the twist stop guide 12 in the yarn running direction. The yarn Y to which a twist has been imparted while being drawn is heated and heat-set by the first heating device 13, and then cooled by the cooling device 14. The yarn Y is untwisted downstream of the false twist device 15 in the yarn running direction, but the yarn Y maintains its wavy false twisted state due to the heat setting (i.e., the crimp of the yarn Y is maintained).

[0071] The false-twisted yarn Y is entangled by the entanglement device 17 while being relaxed between the second feed roller 16 and the third feed roller 18, and then guided downstream in the yarn running direction. Furthermore, the yarn Y is heat-treated by the second heating device 19 while being relaxed between the third feed roller 18 and the fourth feed roller 20. Finally, the yarn Y sent from the fourth feed roller 20 is wound by the winding device 21.

[0072] (Configuration of winding section) The configuration of the winding section 4 will be described with reference to FIG. 2. The winding section 4 has a plurality of winding devices 21. Each winding device 21 is configured to be able to wind the yarn Y onto one winding bobbin Bw. The winding device 21 has a fulcrum guide 31, a traverse device 32, and a cradle 33. The fulcrum guide 31 is a guide that serves as a fulcrum when the yarn Y is traversed. The traverse device 32 is configured to be able to traverse the yarn Y by the traverse guide 34. The cradle 33 is configured to rotatably support the winding bobbin Bw. A contact roller 35 is disposed near the cradle 33. The contact roller 35 contacts the surface of the winding package Pw to apply contact pressure. In the winding section 4 configured as above, the yarn Y sent from the fourth feed roller 20 is wound onto the winding bobbin Bw by each winding device 21 to form the winding package Pw.

[0073] (1st heating device) Next, a more specific configuration of the first heating device 13 will be described with further reference to Fig. 3 to Fig. 8. For the sake of explanation, the second sealing member 83 is not shown in Fig. 7. Fig. 8 is a diagram for explaining thicknesses Ta1, Tb1, Ta2, and Tb2, which will be described later, and reference numerals and the like unnecessary for the explanation are appropriately omitted.

[0074] 3, the first heating device 13 extends in a predetermined extension direction (corresponding to the "predetermined direction" of the present invention) perpendicular to the machine base longitudinal direction. In this embodiment, the extension direction is parallel to the machine base width direction. The extension direction may be inclined with respect to the machine base width direction.

[0075] As described later in detail, the first heating device 13 is formed with a yarn running groove 56 (see FIG. 5) extending along the extension direction. The yarn running groove 56 corresponds to the "yarn running passage" of the present invention. The first heating device 13 is configured to heat the yarn Y running from one side to the other side in the extension direction in the yarn running groove 56. In this embodiment, the first heating device 13 is configured to be able to heat two yarns Y (yarns Ya and Yb: see FIG. 5).

[0076] As shown in FIG. 4, the first heating device 13 mainly includes a heating section 50, heat insulating blocks 91, 92, 93, a box 60, and plate members 71, 72, 73, 74. As shown in FIG. 5(b), the heating section 50 is formed with a yarn running groove 56 (56a, 56b) extending along the extension direction. The yarn running groove 56 (56a, 56b) is open downward. The heating section 50 heats the yarn Y (yarn Ya, Yb) running through the yarn running groove 56 (56a, 56b). As shown in FIG. 4, the box 60 accommodates the heating section 50 and the heat insulating blocks 91, 92, 93. The plate members 71, 72, 73, 74 are disposed between the heating section 50 and the inner wall surface of the box 60.

[0077] As shown in FIG. 5(a), the heating section 50 mainly includes a heat source 51, two heating blocks 52 (52a, 52b), and two yarn contact sections 54 (54a, 54b). The heat source 51 is, for example, a sheath heater. As shown in FIG. 6, the heat source 51 extends along the extension direction. The heating block 52 and the yarn contact section 54 are configured to be heated by the heat generated by the heat source 51. The heating block 52 and the yarn contact section 54 extend in the extension direction along the heat source 51. As shown in FIG. 4, bolts 59 and the like for fixing each member constituting the heating section 50 are exposed on the surface of the heating section 50.

[0078] The heating block 52a and the yarn contact part 54a are members for heating the yarn Ya. The heating block 52b and the yarn contact part 54b are members for heating the yarn Yb. The member for heating the yarn Ya and the member for heating the yarn Yb are disposed on opposite sides of the heat source 51 in the longitudinal direction of the machine.

[0079] With reference to FIG. 5, the members for heating the yarn Ya will be described. The heating block 52a is made of a metal material with a large specific heat, such as brass. The heating block 52a is arranged so as to be in contact with the heat source 51. The heating block 52a is arranged on one side of the heat source 51 in the machine base longitudinal direction (the left side of the paper in FIG. 5(a)). The heating block 52a is formed with a recess 53 (53a) extending in the extension direction. The recess 53a is open to the lower side. The yarn contact portion 54 (54a) is accommodated in the recess 53a.

[0080] The yarn contact part 54a is a long member made of, for example, SUS. The yarn contact part 54a is fixed to the heating block 52a in a state of contact with the heating block 52a. The temperature of the yarn contact part 54a is increased by heat transferred from the heat source 51 via the heating block 52a. The yarn contact part 54a has a yarn contact surface 55 (55a) for contacting the yarn Y. The yarn contact surface 55a faces downward. As shown in FIG. 5(b), the yarn contact surface 55a is curved in a substantially U-shape that bulges downward in a convex manner in a cross section perpendicular to the machine longitudinal direction. As shown in FIG. 5(a), the yarn contact surface 55a is curved in an inverted U-shape that bulges upward in a convex manner when viewed from the extension direction.

[0081] The yarn running groove 56 (56a) is defined by the wall surface that defines the recess 53a of the heating block 52a and the yarn contact surface 55a of the yarn contact portion 54a. The yarn running groove 56 (56a) is open at the lower surface of the heating block 52a. The yarn running groove 56 (56a) is open downward. In other words, the direction from the inside to the outside of the yarn running groove 56 (56a) is downward. The "opening direction" of the present invention is downward.

[0082] Next, a member for heating the yarn Yb will be described. The heating block 52b is disposed on the other side of the heat source 51 in the machine longitudinal direction (the right side of the paper in FIG. 5(a)). The heating block 52b is in contact with the heat source 51. The heating block 52b is formed with a recess 53b having a shape similar to that of the recess 53a. The recess 53b accommodates a yarn contact portion 54b having a structure similar to that of the yarn contact portion 54a. The yarn contact portion 54b has a yarn contact surface 55b having a shape similar to that of the yarn contact surface 55a. The yarn running groove 56b is defined by a wall surface that defines the recess 53b of the heating block 52b and the yarn contact surface 55b of the yarn contact portion 54b. Further details will be omitted.

[0083] The yarn Y (Ya, Yb) fed into the first heating device 13 runs in the yarn running groove 56 (56a, 56b) while contacting the yarn contact surface 55 (55a, 55b). As a result, the yarn Y (Ya, Yb) receives heat from the heating block 52 (52a, 52b) through the yarn contact surface 55 (55a, 55b) and is heated. By appropriately setting the type of yarn Y, the brand (thickness) of the yarn Y, the running speed of the yarn Y, and the heating temperature, the temperature of the yarn Y can be adjusted to an optimal processing temperature.

[0084] As shown in Fig. 4 and Fig. 6, the insulating blocks 91, 92, 93 are disposed below the heating unit 50. The insulating blocks 91, 92, 93 are made of, for example, gypsum board. All of the insulating blocks 91, 92, 93 extend along the extension direction. The insulating blocks 91, 92, 93 are lined up along the longitudinal direction of the machine frame. The gap between the insulating blocks 91, 92 serves as a passage for inserting the yarn Ya into the yarn running groove 56a. The gap between the insulating blocks 92, 93 serves as a passage for inserting the yarn Yb into the yarn running groove 56b.

[0085] 4, the box 60 mainly has a main body 61 and a door 62. The main body 61 is a hollow member having a substantially rectangular parallelepiped shape with the extension direction as the longitudinal direction. The door 62 is capable of closing an opening 68, which will be described later, formed in the main body 61.

[0086] The main body 61 is made of sheet metal. The main body 61 is made of, for example, SUS. The main body 61 has an upper wall 61a, two side walls 61b, two side walls 61c, and a lower wall 61d. As shown in FIG. 4, the upper wall 61a extends along the longitudinal direction of the machine base when viewed from the extension direction. The two side walls 61b are connected to both ends of the upper wall 61a in the longitudinal direction of the machine base. As shown in FIG. 6, the two side walls 61c are connected to both ends of the upper wall 61a in the extension direction. Both side walls 61b and 61c extend along the up-down direction. As shown in FIG. 4, the lower wall 61d is located below the upper wall 61a. The lower wall 61d is parallel to the upper wall 61a. The upper wall 61a and the two side walls 61b of the main body 61 correspond to the "plate member" of the present invention.

[0087] As shown in Fig. 4, the main body 61 has an opening 68 formed at a position facing the open end (lower end) of the yarn running groove 56 in the up-down direction. The open end of the yarn running groove 56 means a portion where the yarn running groove 56 opens on the lower surface of the heating block 52. The opening 68 is formed over the entire length of the main body 61 in the extension direction. The opening 68 is formed in the lower wall 61d.

[0088] The lower wall 61d has different height positions on both sides of the opening 68 in the machine base longitudinal direction. That is, the lower surface of a first portion 61d1 on one side of the lower wall 61d in the machine base longitudinal direction (the left side of the paper in FIG. 4) is located on an imaginary plane P1 perpendicular to the up-down direction. On the other hand, the lower surface of a second portion 61d2 on the other side of the lower wall 61d in the machine base longitudinal direction (the right side of the paper in FIG. 4) is located on an imaginary plane P2 perpendicular to the up-down direction. The imaginary plane P1 is located above the imaginary plane P2.

[0089] 6 and 7, an opening 69 is formed in each of the side walls 61c at both ends in the extension direction of the main body 61. The opening 69 is formed in the center of the side walls 61c in the machine frame longitudinal direction. The opening 69 is open at the bottom. The opening 69 functions as an entrance and exit for the yarn Y traveling in the yarn traveling groove 56.

[0090] 4 and 6, the door 62 is a plate-like member extending along the extension direction. The door 62 is configured to be swingable about a shaft 62a extending along the extension direction. The shaft 62a is attached to the main body 61. The shaft 62a is located below a first portion 61d1 of a bottom wall 61d of the main body 61.

[0091] As shown in Fig. 4, when the door 62 is in the closed position, it covers the first portion 61d1 of the bottom wall 61d of the main body 61 and the opening 68. This causes the opening 68 to be closed by the door 62. When the door 62 in the closed position swings downward (clockwise in Fig. 4) about the shaft 62a to the open position shown by the dashed line in Fig. 4, the opening 68 of the main body 61 is opened. That is, the door 62 is configured to be movable between a closed position where the opening 68 of the main body 61 is closed and an open position where the opening 68 is opened. When the door 62 is in the open position, the yarn Y can be inserted into the main body 61 of the box 60 through the opening 68, and the yarn Y can be set in the yarn running groove 56.

[0092] Each of the plate members 71, 72, 73, and 74 is made of a single sheet of metal. The plate members 71, 72, 73, and 74 are made of, for example, SUS. Each of the plate members 71, 72, 73, and 74 may be made of multiple sheets of metal. All of the plate members 71, 72, 73, and 74 extend along the extension direction. All of the plate members 71, 72, 73, and 74 are substantially groove-shaped and open downward (in the opening direction of the yarn running groove 56).

[0093] As shown in Fig. 4, the plate member 71 has an upper wall 71a and two side walls 71b. When viewed from the extension direction, the upper wall 71a extends along the longitudinal direction of the machine base. The two side walls 71b are connected to both ends of the upper wall 71a in the longitudinal direction of the machine base. The side walls 71b extend along the up-down direction. The plate members 72, 73, and 74 each have an upper wall 72a, 73a, and 74a having a shape similar to that of the plate member 71, and two side walls 72b, 73b, and 74b.

[0094] The four plate members 71, 72, 73, 74 and the upper wall 61a and two side walls 61b of the main body 61 of the box 60 are arranged in a nested manner. The innermost plate member 71 is arranged so as to surround the heating unit 50. The plate member 72 is arranged so as to surround the plate member 71. The plate member 73 is arranged so as to surround the plate member 72. The plate member 74 is arranged so as to surround the plate member 73. Furthermore, the upper wall 61a and two side walls 61b of the main body 61 of the box 60 are arranged so as to surround the plate member 74. The four plate members 71, 72, 73, 74 and the upper wall 61a and two side walls 61b of the main body 61 (corresponding to the "plate members" of the present invention) are not arranged in an area facing the lower end of the yarn running groove 56 (corresponding to the "open end" of the present invention).

[0095] The four plate members 71, 72, 73, 74 and the main body 61 are arranged in this order in a direction away from the heating unit 50 on a virtual plane (e.g., the plane of FIG. 4) that is perpendicular to the extension direction and intersects with the heating unit 50. That is, among the four plate members 71, 72, 73, 74 and the main body 61, the plate member 71 is arranged closest to the heating unit 50. A heat insulating member 80 is arranged between the plate member 71 and the heating unit 50. The heat insulating member 80 is, for example, ceramic fiber or glass wool. The upper wall 61a and the two side walls 61b of the main body 61 correspond to the "plate members located farthest from the heating unit" of the present invention.

[0096] The plate members 71, 72, 73, 74 and the upper walls 71a, 72a, 73a, 74a, 61a of the main body 61 are located above the heating section 50. The lower ends of the plate members 71, 72, 73, 74 and the side walls 71b, 72b, 73b, 74b, 61b of the main body 61 are located below the heating section 50. In other words, the plate members 71, 72, 73, 74 and the main body 61 all cover the entire heating section 50 in the up-down direction (corresponding to the "orthogonal direction" of the present invention).

[0097] The four plate members 71, 72, 73, 74, the upper wall 61a, and the two side walls 61b of the main body 61 are arranged facing each other and spaced apart from each other. Between the two facing plate members, inter-plate spaces 75a, 75b, and 75c are formed. Between the adjacent plate members 71 and 72, an inter-plate space 75a is formed. Between the adjacent plate members 72 and 73, an inter-plate space 75b is formed. Between the adjacent plate members 73 and 74, an inter-plate space 75c is formed. In addition, between the plate member 74 and the upper wall 61a and the two side walls 61b of the main body 61, an inter-plate space 75d is formed. Hereinafter, when the inter-plate spaces 75a, 75b, 75c, and 75d are not distinguished from each other, they are referred to as inter-plate spaces 75. As shown in FIG. 4, each inter-plate space 75 is a groove type that opens downward when viewed from the extension direction. Each inter-plate space 75 is a single undivided space. Each inter-plate space 75 is sealed.

[0098] An air layer is formed in each of these four inter-plate spaces 75. That is, in a virtual plane (e.g., the plane of FIG. 4) perpendicular to the extension direction and intersecting with the heating unit 50, the four air layers formed in each inter-plate space 75 are lined up in a direction away from the heating unit 50. The thickness of the air layer is preferably 5 mm or more and less than 15 mm. The thickness of the air layer may be greater than 0 and less than 5 mm. The thickness of the air layer may be 15 mm or more. In this embodiment, the thickness of each of the four air layers is 10 mm. The thicknesses of the four air layers may be different from each other.

[0099] Of the four inter-plate spaces 75, the opposing surfaces of the two plate members 71, 72 constituting the inter-plate space 75a located closest to the heating unit 50 are both mirror-finished. That is, of the two plate members 71, 72, the surface of the plate member 71 closest to the heating unit 50 opposite the heating unit 50 is mirror-finished. In addition, of the two plate members 71, 72, the surface of the plate member 72 farthest from the heating unit 50 facing the heating unit 50 is mirror-finished.

[0100] 6 and 7, first sealing members 82 are disposed between both ends of the plate members 71, 72, 73, and 74 and the side walls 61c of the main body 61 of the box 60 in the extension direction. The first sealing members 82 seal both ends of the four inter-plate spaces 75 in the extension direction. Here, both ends of each inter-plate space 75 in the extension direction are boundaries of the inter-plate spaces 75, and are portions of the inter-plate spaces 75 that are not defined by the two plate members that constitute the inter-plate spaces 75. By sealing both ends of the inter-plate spaces 75 in the extension direction with the first sealing members 82, it is possible to suppress air from entering or leaving the inter-plate spaces 75 via the ends.

[0101] The first sealing member 82 is made of a heat insulating material such as rock wool. The material of the first sealing member 82 is not limited to rock wool. The density of the first sealing member 82 is 80 kg / m 3 The density of the first sealing member 82 is preferably 80 kg / m or more. 3 It may be less than 100%. The density of the insulating material constituting the first sealing member 82 is preferably determined taking into consideration the breathability of the first sealing member 82. The lower the breathability of the first sealing member 82 (the higher the density), the less air leaks from the inter-plate space 75, and the more airtight the inter-plate space 75 is.

[0102] As shown in Figs. 4 and 7, a bent portion 71c is formed at the end of the lower side of the plate member 71. In Fig. 7, the lower surface of the bent portion 71c is hatched to make the bent portion 71c easier to understand. The bent portion 71c is formed at the lower end of each of the two side walls 71b of the plate member 71. The bent portion 71c of the side wall 71b on one side of the heat insulating block 92 in the machine base longitudinal direction (left side of the paper in Fig. 4) of the two side walls 71b is formed by bending the lower end of the side wall 71b at approximately 90° to one side of the machine base longitudinal direction. The bent portion 71c of the side wall 71b on the other side of the heat insulating block 92 in the machine base longitudinal direction (right side of the paper in Fig. 4) of the two side walls 71b is formed by bending the lower end of the side wall 71b at approximately 90° to the other side of the machine base longitudinal direction.

[0103] As shown in FIG. 7, the bent portion 71c extends over the entire length of the plate member 71 in the extending direction. Three protruding portions 71d are formed in the bent portion 71c of each side wall 71b. The three protruding portions 71d are located at both ends and the center of the bent portion 71c in the extending direction. The length of the bent portion 71c in the machine base longitudinal direction is approximately the same as the distance between the plate member 71 and the plate member 72 in the machine base longitudinal direction in the portion other than the portion where the protruding portion 71d is formed. The length of the bent portion 71c in the machine base longitudinal direction in the portion where the protruding portion 71d is formed is approximately the same as the distance between the plate member 71 and the plate member 73 in the machine base longitudinal direction.

[0104] As shown in Fig. 4, a bent portion 72c is formed at the end on the lower side of the plate member 72. The bent portion 72c is formed at the lower end portions of the two side walls 72b of the plate member 72. The bent portion 72c of the side wall 72b on one side of the insulation block 92 in the machine base longitudinal direction (left side of the paper in Fig. 4) of the two side walls 72b is formed by bending the lower end portion of the side wall 72b to the other side of the machine base longitudinal direction by approximately 90°. The bent portion 72c of the side wall 72b on the other side of the insulation block 92 in the machine base longitudinal direction (right side of the paper in Fig. 4) of the two side walls 72b is formed by bending the lower end portion of the side wall 72b to one side of the machine base longitudinal direction by approximately 90°.

[0105] The bent portion 72c extends over the entire length of the plate member 72. The length of the bent portion 72c in the machine base longitudinal direction is approximately the same as the distance between the plate members 71 and 72 in the machine base longitudinal direction. The bent portion 72c is located above the bent portion 71c of the plate member 71.

[0106] The bent portion 71c of the plate member 71 and the bent portion 72c of the plate member 72 are fixed together by a bolt (not shown) or the like. That is, the plate members 71 and 72 are fixed together at the bent portions 71c and 72c.

[0107] The lower end of inter-plate space 75a (corresponding to "one side in the perpendicular direction" of the present invention) is sealed by bent portions 71c, 72c of two plate members 71, 72 constituting inter-plate space 75a. Bent portions 71c, 72c also function as spacers that ensure the distance between two plate members 71, 72. In addition, protruding portion 71d at bent portion 71c of plate member 71 functions as a spacer that ensures the distance between plate members 72, 73.

[0108] As shown in Fig. 4 and Fig. 7, a bent portion 73c is formed at the end portion on the lower side of the plate member 73. In Fig. 7, the lower surface of the bent portion 73c is hatched to make the bent portion 73c easier to understand. The bent portion 73c is formed at the lower end portions of the two side walls 73b of the plate member 73. The bent portion 73c of the side wall 73b on one side in the machine base longitudinal direction (left side of the paper in Fig. 4) of the two side walls 73b is formed by bending the lower end portion of the side wall 73b to one side in the machine base longitudinal direction by approximately 90°. The bent portion 73c of the side wall 73b on the other side in the machine base longitudinal direction (right side of the paper in Fig. 4) of the two side walls 73b is formed by bending the lower end portion of the side wall 73b to the other side in the machine base longitudinal direction by approximately 90°.

[0109] 7, bent portion 73c extends over the entire length of plate member 73. The length of bent portion 73c in the machine base longitudinal direction is approximately the same as the distance between plate member 73 and plate member 74 in the machine base longitudinal direction.

[0110] As shown in FIG. 7, a splice plate 78 is attached to the lower surface of the bent portion 73c formed on each of the two side walls 73b of the plate member 73. The splice plate 78 attached to the bent portion 73c of the side wall 73b located on one side of the heat insulating block 92 in the machine base longitudinal direction (upper side of the paper in FIG. 7) of the two side walls 73b of the plate member 73 extends to the side wall 61b of the main body part 61 on one side of the machine base longitudinal direction beyond the bent portion 73c. ​​The splice plate 78 attached to the bent portion 73c of the side wall 73b located on the other side of the heat insulating block 92 in the machine base longitudinal direction (lower side of the paper in FIG. 7) of the two side walls 73b of the plate member 73 extends to the side wall 61b of the main body part 61 on the other side of the machine base longitudinal direction beyond the bent portion 73c. ​​The splice plate 78 also functions as a spacer that ensures a gap between the plate member 74 and the main body part 61.

[0111] Three splice plates 78 are attached to each of the bent portions 73c formed on the two side walls 73b of the plate member 73. The three splice plates 78 attached to one bent portion 73c are arranged at different positions in the extending direction. The splice plate 78 located on one side of the extending direction (left side of the paper in FIG. 7) of the three splice plates 78 is located between the protruding portion 71d located on one side of the extending direction and the protruding portion 71d located in the center among the three protruding portions 71d formed on the bent portion 71c in the extending direction. The splice plate 78 located on the other side of the extending direction (right side of the paper in FIG. 7) of the three splice plates 78 is located between the protruding portion 71d located on the other side of the extending direction and the protruding portion 71d located in the center among the three protruding portions 71d formed on the bent portion 71c in the extending direction. Of the three splice plates 78, the splice plate 78 located at the center in the extension direction is located at the same position in the extension direction as the protruding portion 71d located at the center of the three protruding portions 71d formed on the bent portion 71c.

[0112] As shown in Fig. 4, a bent portion 74c is formed at the end on the lower side of the plate member 74. The bent portion 74c is formed at the lower end portions of the two side walls 74b of the plate member 74. The bent portion 74c of the side wall 74b on one side of the insulation block 92 in the machine base longitudinal direction (left side of the paper in Fig. 4) of the two side walls 74b is formed by bending the lower end portion of the side wall 74b approximately 90° to the other side in the machine base longitudinal direction. The bent portion 74c of the side wall 74b on the other side of the insulation block 92 in the machine base longitudinal direction (right side of the paper in Fig. 4) of the two side walls 74b is formed by bending the lower end portion of the side wall 74b approximately 90° to one side in the machine base longitudinal direction.

[0113] The bent portion 74c extends over the entire length of the plate member 74. The length of the bent portion 74c in the machine base longitudinal direction is approximately the same as the distance between the plate members 73 and 74 in the machine base longitudinal direction. The bent portion 74c is located above the bent portion 73c of the plate member 73.

[0114] The bent portion 73c of the plate member 73 and the bent portion 74c of the plate member 74 are fixed together by a bolt (not shown) or the like. That is, the plate members 73 and 74 are fixed together at the bent portions 73c and 74c.

[0115] The lower end of inter-plate space 75c (corresponding to "one side in the perpendicular direction" of the present invention) is sealed by bent portions 73c, 74c of two plate members 73, 74 that form inter-plate space 75c. Bent portions 73c, 74c also function as spacers that ensure the distance between two plate members 73, 74.

[0116] As described above, of the four inter-plate spaces 75, the inter-plate space 75a located closest to the heating unit 50 is sealed by the bent portions 71c and 72c (corresponding to the "first bent portion" of the present invention). In addition, the inter-plate space 75c is sealed by the bent portions 73c and 74c (corresponding to the "second bent portion" of the present invention).

[0117] The bent portions 71c, 72c and the bent portions 73c, 74c that seal the two inter-plate spaces 75a, 75c, respectively, are both located below the heating portion 50. The bent portions 71c, 72c and the bent portions 73c, 74c are located at different positions in the up-down direction. More specifically, the bent portions 71c, 72c are located above the bent portions 73c, 74c. The bent portions 71c, 72c are located closer to the heating portion 50 in the up-down direction than the bent portions 73c, 74c.

[0118] As shown in Fig. 4, a second sealing member 83 is disposed between the lower ends of the plate members 71, 72, 73, and 74 and the lower wall 61d of the main body 61 of the box 60 in the vertical direction. The second sealing member 83 is disposed on both sides of the opening 68 formed in the main body 61 of the box 60 in the machine base longitudinal direction. The second sealing member 83 seals the lower ends of the inter-plate spaces 75b and 75d. That is, the second sealing member 83 seals the lower ends of the inter-plate spaces 75b and 75d, which are all inter-plate spaces 75 that are not sealed by the bent portions among the inter-plate spaces 75.

[0119] That is, of the two inter-plate spaces formed by three adjacent plates (corresponding to the "first plate member, second plate member and third plate member" of the present invention) among the plate members 71, 72, 73 and 74 and the main body portion 61 (upper wall 61a and two side walls 61b), one is sealed by the bent portions 71c, 72c and the bent portions 73c, 74c, and the other is sealed by the second sealing member 83. For example, in the case of three adjacent plate members 71, 72 and 73, the inter-plate space 75a between the plate members 71 and 72 is sealed by the bent portions 71c and 72c, and the inter-plate space 75b between the plate members 72 and 73 is sealed by the second sealing member 83.

[0120] Here, the lower end of inter-plate space 75b is the boundary of inter-plate space 75b and is a portion of inter-plate space 75b that is not defined by plate members 72 and 73 that constitute inter-plate space 75b. Also, the lower end of inter-plate space 75d is the boundary of inter-plate space 75d and is a portion of inter-plate space 75d that is not defined by plate members 74 and main body 61 that constitute inter-plate space 75d. By sealing the lower end of inter-plate spaces 75b, 75d with second sealing member 83, it is possible to suppress air from entering or leaving inter-plate spaces 75b, 75d via the end.

[0121] The second sealing member 83 covers the lower surface (surface opposite to the inter-plate space 75a) of the bent portion 71c that seals the inter-plate space 75a. The second sealing member 83 also covers the lower surface (surface opposite to the inter-plate space 75c) of the bent portion 73c that seals the inter-plate space 75c. That is, the second sealing member 83 corresponds to the "covering member" of the present invention. That is, the second sealing member 83 covers the lower surfaces of the bent portions 71c and 73c that cover the inter-plate spaces 75a and 75c, which are all inter-plate spaces 75 that are sealed by the bent portions among the inter-plate spaces 75.

[0122] Here, as shown in Fig. 8, in the second sealing member 83 located on one side of the opening 68 in the machine base longitudinal direction (the left side of the paper in Fig. 8), the thickness in the vertical direction of the portion covering the bent portion 71c that seals the inter-plate space 75a is defined as thickness Ta1. Also, in the second sealing member 83, the thickness in the vertical direction of the portion covering the bent portion 73c that seals the inter-plate space 75c is defined as thickness Tb1. In this case, thickness Ta1 is greater than thickness Tb1.

[0123] In addition, in the second sealing member 83 located on the other side of the opening 68 in the machine base longitudinal direction (the right side of the paper in FIG. 8), the thickness in the vertical direction of the portion covering the bent portion 71c that seals the inter-plate space 75a is defined as thickness Ta2. Furthermore, in the second sealing member 83, the thickness in the vertical direction of the portion covering the bent portion 73c that seals the inter-plate space 75c is defined as thickness Tb2. In this case, thickness Ta2 is greater than thickness Tb2.

[0124] The second sealing member 83 is made of a heat insulating material such as rock wool. The material of the second sealing member 83 is not limited to rock wool. The density of the second sealing member 83 is 80 kg / m 3 The density of the second sealing member 83 is preferably 80 kg / m or more. 3 It may be less than 100%. The density of the insulating material constituting the second sealing member 83 is preferably determined in consideration of the breathability of the second sealing member 83. The lower the breathability of the second sealing member 83 (the higher the density), the less air escapes from the inter-plate spaces 75a, 75c, and the more airtight the inter-plate spaces 75a, 75c are.

[0125] As shown in Figures 4 and 6, a plurality of spacer members 81 are arranged in each inter-plate space 75. As shown in Figure 4, the spacer members 81 are arranged at the corners of the inter-plate space 75 having a groove shape that opens downward. In other words, the spacer members 81 are arranged at both ends in the machine base longitudinal direction in the upper part of the inter-plate space 75.

[0126] The bent portions 71c and 72c sealing the inter-plate space 75a and the spacer member 81 arranged in the inter-plate space 75b adjacent to the inter-plate space 75a are arranged at different positions in the vertical direction. The bent portions 73c and 74c sealing the inter-plate space 75c and the spacer members 81 arranged in the inter-plate spaces 75b and 75d adjacent to the inter-plate space 75c are arranged at different positions in the vertical direction. Also, as shown in FIG. 6, the spacer members 81 arranged in two adjacent inter-plate spaces 75 are arranged at different positions in the extension direction.

[0127] As described above, adjacent plate members 71, 72 are fixed to each other at bent portions 71c, 72c. Adjacent plate members 73, 74 are fixed to each other at bent portions 73c, 74c. Adjacent plate members 72, 73 are fixed to each other by a connecting member 84. Furthermore, plate member 74 and main body 61 of box 60 are fixed to each other by a connecting member 85.

[0128] As shown in Figures 4 and 6, the connection member 84 is disposed in the inter-plate space 75b. The connection member 84 is disposed in the center in the longitudinal direction of the machine base at the upper portion of the inter-plate space 75b, which has a groove shape that opens downward. The connection member 84 is disposed at both ends in the extending direction of the inter-plate space 75b. The plate members 72 and 73 are fixed to each other at their upper ends by the connection member 84.

[0129] As shown in Figures 4 and 6, the connection member 85 is disposed in the inter-plate space 75d. The connection member 85 is disposed in the center in the longitudinal direction of the machine base at the upper portion of the inter-plate space 75d, which has a groove shape that opens downward. The connection members 85 are disposed at both ends in the extending direction of the inter-plate space 75d. The plate member 74 and the main body 61 of the box 60 are fixed to each other at the upper ends by the connection member 85.

[0130] (Features of the embodiment) As described above, the first heating device 13 of the present embodiment is provided with the yarn running groove 56 extending along the extension direction, the heating unit 50 for heating the yarn Y running in the yarn running groove 56, the box 60 for accommodating the heating unit 50, the plurality of plate members 71, 72, 73, 74, the first sealing member 82, and the second sealing member 83. The plate members 71, 72, 73, 74 and the upper wall 61a and two side walls 61b of the main body 61 of the box 60 are arranged facing each other while being spaced apart from each other, and are arranged in a direction away from the heating unit 50 on an imaginary plane perpendicular to the extension direction and intersecting with the heating unit 50. The first sealing member 82 and the second sealing member 83 seal at least a part of the end of the inter-plate space 75 between the two opposing plate members and between the plate member 74 and the main body 61. A plurality of air layers formed in the inter-plate spaces 75 are arranged side by side in a direction away from the heating section 50 on an imaginary plane perpendicular to the extension direction and intersecting with the heating section 50 .

[0131] According to the above-mentioned configuration, the multiple air layers arranged in a direction away from the heating unit 50 on a virtual plane perpendicular to the extension direction and intersecting with the heating unit 50 can suppress the release of heat from the heating unit 50 to the outside. In addition, since the air layer has a relatively small thermal conductivity, it exhibits sufficient heat insulation performance even if it is small in thickness. Furthermore, since at least a part of the end of the inter-plate space 75 is sealed with the first sealing member 82 and the second sealing member 83, the inflow and outflow of air between the inside and outside of the inter-plate space 75 can be suppressed. This can suppress the occurrence of convection in the air layer. Therefore, it is difficult for heat to move between the two plate members constituting the inter-plate space 75 or between the plate member 74 and the main body 61 of the box 60, and the heat insulation performance of the air layer can be further improved. Therefore, power consumption can be reduced without increasing the size of the device.

[0132] Moreover, in the first heating device 13 of the present embodiment, the inter-plate space 75 is sealed. With this configuration, since the inter-plate space 75 is sealed, it is possible to reliably prevent air from entering and exiting between the inside and outside of the inter-plate space 75. Therefore, it is possible to further improve the heat insulating performance of the air layer.

[0133] Furthermore, in the first heating device 13 of this embodiment, each of the plate members 71, 72, 73, and 74, as well as the upper wall 61a and the two side walls 61b of the main body 61 extend along the extension direction. The first sealing member 82 is made of a heat insulating material and seals both ends of the inter-plate space 75 in the extension direction. With this configuration, by sealing both ends of the inter-plate space 75 in a predetermined direction with the first sealing member 82, it is possible to suppress the inflow and outflow of air from both ends. In addition, since the first sealing member 82 that seals both ends of the inter-plate space 75 in the extension direction is made of a heat insulating material, it is possible to suppress the transfer of heat between adjacent plate members and between the plate member 74 and the main body 61 of the box 60 through the first sealing member 82. This can further improve the insulation performance by the air layer.

[0134] In addition, in the first heating device 13 of this embodiment, the first sealing member 82 has a density of 80 kg / m 3That is all. With this configuration, by making the first sealing member 82 high density, it is possible to more reliably prevent air from passing through the first sealing member 82 between the inside and outside of the inter-plate space 75. Therefore, it is possible to more reliably seal the inter-plate space 75.

[0135] Moreover, the first heating device 13 of this embodiment further includes spacer members 81 arranged in each inter-plate space 75. If the thickness of the inter-plate space 75 is not uniform, convection is likely to occur in the air layer formed in the inter-plate space 75 due to the temperature difference occurring in the inter-plate space 75. According to this configuration, by arranging the spacer members 81 in the inter-plate space 75, the thickness of the inter-plate space 75 can be made uniform. Therefore, the occurrence of convection in the air layer is suppressed, and the heat insulating performance by the air layer can be further improved.

[0136] In the first heating device 13 of this embodiment, the spacer members 81 arranged in each of two adjacent inter-plate spaces 75 are arranged at different positions in the extension direction. If the spacer members 81 arranged in each of two adjacent inter-plate spaces 75 are arranged at the same position in the extension direction, heat is likely to transfer between the plate members or between the plate members and the main body 61 of the box 60 via these two spacer members 81. In this configuration, heat is less likely to transfer between the plate members or between the plate members and the main body 61 of the box 60 via the two spacer members 81, and the heat insulation performance due to the air layer can be further improved.

[0137] In addition, in the first heating device 13 of this embodiment, the lower end of the inter-plate space 75a is sealed by bent portions 71c and 72c formed by bending the lower ends of the plate members 71 and 72 constituting the inter-plate space 75a. The lower end of the inter-plate space 75c is sealed by bent portions 73c and 74c formed by bending the lower ends of the plate members 73 and 74 constituting the inter-plate space 75c. In two adjacent inter-plate spaces 75, the bent portions 71c and 72c and the bent portions 73c and 74c sealing one inter-plate space 75 (75a and 75c) and the spacer member 81 arranged in the other inter-plate space 75 (75b and 75d) are arranged at different positions in the vertical direction. According to this configuration, the inter-plate spaces 75a, 75c can be sealed by sealing the inter-plate spaces 75a, 75c with the bent portions 71c, 72c, 73c, 74c that are part of the plate members 71, 72, 73, 74. In addition, heat is less likely to transfer between the plate members or between the plate members and the main body 61 of the box 60 via the bent portions 71c, 72c, 73c, 74c and the spacer member 81, and the heat insulation performance due to the air layer can be further improved.

[0138] Furthermore, in the first heating device 13 of this embodiment, the bent portions 71c, 72c function as spacers that ensure the distance between the plate members 71, 72. Moreover, the bent portions 73c, 74c function as spacers that ensure the distance between the plate members 73, 74. According to this configuration, the bent portions 71c, 72c and the bent portions 73c, 74c can make the thicknesses of the inter-plate spaces 75a, 75c uniform.

[0139] In the first heating device 13 of this embodiment, the lower ends of the inter-plate spaces 75a and 75c are sealed by the bent portions 71c and 72c, and the bent portions 73c and 74c. The lower ends of the inter-plate spaces 75b and 75d are sealed by the second sealing member 83 made of a heat insulating material. When adjacent inter-plate spaces 75 are all sealed by the bent portions, heat is transferred between the multiple plate members one after another through the bent portions that seal each inter-plate space 75. According to this configuration, the inter-plate spaces 75b and 75d are sealed by the second sealing member 83 made of a heat insulating material. Therefore, it is possible to suppress the heat transferred between the plate members 71 and 72 through the bent portions 71c and 72c from being transferred to the plate member 73. It is also possible to suppress the heat transferred between the plate members 73 and 74 through the bent portions 73c and 74c from being transferred to the main body portion 61 of the box 60. This makes it possible to maintain the airtightness of the spaces 75 between the plates while further improving the heat insulating performance provided by the air layer.

[0140] In the first heating device 13 of this embodiment, the bent portions 71c, 72c that seal the inter-plate space 75a and the bent portions 73c, 74c that seal the inter-plate space 75c are located at different positions in the vertical direction. If the bent portions 71c, 72c and the bent portions 73c, 74c that seal the inter-plate spaces 75a, 75c, respectively, are located at the same positions in the vertical direction, there is a risk of heat transfer between different plate members through these bent portions 71c, 72c and the bent portions 73c, 74c. In this configuration, heat is less likely to transfer between different plate members through the bent portions 71c, 72c and the bent portions 73c, 74c, and the heat insulation performance due to the air layer can be further improved.

[0141] Furthermore, in the first heating device 13 of this embodiment, the second sealing member 83 covers the surface of the bent portion 71c that seals the inter-plate space 75a on the side opposite the inter-plate space 75a, and the surface of the bent portion 73c that seals the inter-plate space 75c on the side opposite the inter-plate space 75c. With this configuration, the second sealing member 83 can suppress the release of heat from the bent portions 71c, 73c. ​​In particular, it is possible to reliably suppress the release of heat from the bent portion 71c of the plate member 71 that is located near the heating unit 50 and becomes hot.

[0142] In addition, in the first heating device 13 of this embodiment, the second sealing member 83 also serves as a covering member that covers the surfaces of the bent portions 71c, 73c that seal the inter-plate spaces 75a, 75c. With this configuration, the configuration of the first heating device 13 can be simplified compared to when the covering member is a separate member from the second sealing member 83.

[0143] Furthermore, in the first heating device 13 of this embodiment, the second sealing member 83 covers the lower ends of all inter-plate spaces 75b, 75d that are not sealed by bent portions in the inter-plate space 75, and covers the lower surfaces of bent portions 71c, 73c that cover all inter-plate spaces 75a, 75c that are sealed by bent portions in the inter-plate space 75. With this configuration, a configuration can be realized in which the single second sealing member 83 can maintain the airtightness of all inter-plate spaces 75 while further improving the heat insulation performance provided by the air layer.

[0144] In the first heating device 13 of this embodiment, the bent portions 71c and 72c that seal the inter-plate space 75a are located closer to the heating unit 50 in the vertical direction than the bent portions 73c and 74c that seal the inter-plate space 75c. The second sealing member 83 has thicknesses Ta1 and Ta2 in the vertical direction of the portion covering the bent portion 71c that are greater than thicknesses Tb1 and Tb2 in the vertical direction of the portion covering the bent portion 73c. ​​With this configuration, the bent portion 71c is located closer to the heating unit 50 in the vertical direction, and the heat released from the bent portion 71c that becomes hot can be reliably suppressed.

[0145] In the first heating device 13 of this embodiment, the plate members 71 and 72 are fixed to each other at the bent portions 71c and 72c formed at the lower ends thereof. The plate members 73 and 74 are fixed to each other at the bent portions 73c and 74c formed at the lower ends thereof. The plate members 72 and 73 are fixed to each other at the upper ends thereof by a connecting member 84. The plate member 74 and the main body portion 61 of the box 60 are fixed to each other at the upper ends thereof by a connecting member 85. According to this configuration, the layer thickness between the plate members 71 and 72 can be maintained by the bent portions 71c and 72c to which the plate members 71 and 72 are fixed. The layer thickness between the plate members 73 and 74 can be maintained by the bent portions 73c and 74c to which the plate members 73 and 74 are fixed. Furthermore, the layer thickness between the plate members 72 and 73 can be maintained by the connecting member 84 that fixes the plate members 72 and 73. The layer thickness between the plate member 74 and the main body 61 of the box 60 can be maintained by the connection member 85 that fixes the plate member 74 and the main body 61 of the box 60. Here, when the fixed parts between the plate members or between the plate member 74 and the main body 61 of the box 60 are arranged close to each other, heat is likely to transfer between the plate members or between the plate member and the main body 61 of the box 60 via these fixed parts. In this configuration, the fixed parts of the plate members 71 and 72 (parts where the bent parts 71c and 72c are formed) and the fixed parts of the plate members 73 and 74 (parts where the bent parts 73c and 74c are formed) can be separated from the fixed parts of the plate members 72 and 73 (parts connected by the connection member 84) and the fixed part between the plate member 74 and the main body 61 of the box 60 (parts connected by the connection member 85) in the vertical direction. Therefore, heat is less likely to transfer between the plate members or between the plate members and the main body 61 of the box 60 via the fixed portions, and the heat insulating performance due to the air layer can be further improved.

[0146] Furthermore, in the first heating device 13 of this embodiment, the second sealing member 83 is made of a heat insulating material and seals the lower end of the inter-plate spaces 75b, 75d. With this configuration, by sealing the lower end of the inter-plate spaces 75b, 75d with the second sealing member 83, it is possible to suppress the inflow and outflow of air from the end. In addition, since the second sealing member 83 is made of a heat insulating material, it is possible to suppress the transfer of heat between the adjacent plate members 72, 73 and between the plate member 74 and the main body 61 of the box 60 via the second sealing member 83. This makes it possible to further improve the heat insulating performance by the air layer.

[0147] In the first heating device 13 of this embodiment, the second sealing member 83 has a density of 80 kg / m 3 That is all. With this configuration, by making the second sealing member 83 high density, it is possible to reliably prevent air from passing through the second sealing member 83 between the inside and outside of the inter-plate spaces 75b, 75d. Therefore, it is possible to more reliably seal the inter-plate spaces 75b, 75d.

[0148] In addition, in the first heating device 13 of this embodiment, the thickness of the air layer is 5 mm or more and less than 15 mm. If the thickness of the air layer is large, convection is likely to occur. If convection occurs in the air layer, heat is likely to move between the two plate members constituting the inter-plate space 75 in which the air layer is formed, or between the plate member 74 and the main body 61 of the box 60. On the other hand, if the thickness of the air layer is small, there is a risk that adjacent plate members will come into contact with each other, or between the plate member 74 and the main body 61 of the box 60. In that case, heat moves between adjacent plate members or between the plate member 74 and the main body 61 of the box 60 through the contact portion. According to this configuration, the thickness of the air layer can be set to a size that can suppress the occurrence of convection in the air layer, while also being a size that makes it difficult for the plate members to come into contact with each other, or between the plate member 74 and the main body 61 of the box 60. This can further improve the heat insulation performance of the air layer.

[0149] Furthermore, the first heating device 13 of this embodiment further includes a heat insulating member 80 disposed between the heating unit 50 and the plate member 71, which is disposed closest to the heating unit 50 among the multiple plate members 71, 72, 73, and 74. On the surface of the heating unit 50, bolts 59 and the like for fixing the members constituting the heating unit 50 are exposed, and the surface is uneven. Therefore, it is difficult to form an air layer having a uniform thickness and high heat insulating performance between the surface of the heating unit 50 and the plate member 71. In this configuration, by disposing the heat insulating member 80 between the heating unit 50 and the plate member 71, it is possible to further suppress the release of heat from the heating unit 50 to the outside.

[0150] Moreover, in the first heating device 13 of the present embodiment, the yarn running groove 56 is defined in the heating section 50. With this configuration, the yarn Y can be heated efficiently.

[0151] Additionally, in the first heating device 13 of the present embodiment, the yarn running groove 56 is open downward, and the four plate members 71, 72, 73, 74 and the upper wall 61a and two side walls 61b of the main body 61 are not disposed in an area facing the lower end of the yarn running groove 56. With this configuration, it is possible to leave open the area facing the lower end of the yarn running groove 56, which is the area through which the yarn Y passes when the yarn Y is inserted into the yarn running groove 56.

[0152] In the first heating device 13 of this embodiment, each of the plate members 71, 72, 73, and 74 extends along the extension direction and is a groove type that opens downward. The plate members 71, 72, 73, and 74, as well as the upper wall 61a and two side walls 61b of the main body 61 are arranged in a nested manner, and the innermost plate member 71 is arranged to surround the heating unit 50. With this configuration, the heating unit 50 can be surrounded by an air layer formed in the inter-plate space 75 between the two adjacent plate members or between the plate member 74 and the main body 61, while leaving an area through which the yarn Y passes when it is inserted into the yarn running groove 56. Therefore, the release of heat from the heating unit 50 to the outside can be effectively suppressed.

[0153] Furthermore, in the first heating device 13 of this embodiment, the opposing surfaces of the two plate members 71 and 72 constituting the inter-plate space 75a located closest to the heating unit 50 among the four inter-plate spaces 75 are both mirror-finished. According to this configuration, the mirror surfaces of the plate members 71 and 72 can suppress the radiant heat from the heating unit 50. Therefore, the heat transfer due to radiation can be suppressed and the power consumption can be further reduced. In addition, mirror-finishing the surfaces of many plate members increases the cost. In this configuration, by mirror-finishing the surface defining the inter-plate space 75a located closest to the heating unit 50, it is possible to suppress the increase in cost while most effectively suppressing the radiant heat from the heating unit 50. Furthermore, dirt is easily noticeable on the mirror-finished surface. In this configuration, the surface defining the inter-plate space 75a is not visible from the outside, so dirt attached to the mirror surface is not easily noticeable.

[0154] Although the embodiments of the present invention have been described above based on the drawings, the specific configuration should not be considered to be limited to these embodiments. The scope of the present invention is indicated by the claims rather than the description of the above embodiments, and further includes all modifications within the meaning and scope of the claims.

[0155] In the above embodiment, the present invention is applied to the first heating device 13 of the false twisting machine 1, but the present invention can also be applied to the second heating device 19. Below, a description will be given of a case in which the present invention is applied to the second heating device 19 as a modified example of the above embodiment.

[0156] As described above, the second heating device 19 is provided one per span. As shown in Fig. 9 and Fig. 10, the second heating device 19 includes a plurality of heating sections 150. The heating sections 150 extend in the up-down direction as shown in Fig. 10 and Fig. 11(b). That is, in this modification, the up-down direction corresponds to the "predetermined direction" of the present invention.

[0157] As shown in Figs. 11(a) and 11(b), the heating unit 150 has a pipe 151 extending in the vertical direction and two pipes 152a and 152b inserted into the pipe 151. The pipe 151 is filled with a heat medium 154. As shown in Fig. 10, the upper ends of the pipes 151 of the heating units 150 are connected to each other by a pipe 153. The pipe 153 allows the heat medium 154 to flow between the pipes 151 of the heating units 150. The pipes 152a and 152b serve as yarn running paths for the yarns Ya and Yb, respectively. The second heating device 19 heats the heat medium 154 to heat the air in the space in the pipes 152a and 152b, thereby heating the yarns Ya and Yb running in the pipes 152a and 152b.

[0158] 9 and 10, the heating units 150 are housed in a box 160. Plate members 171, 172, 173, and 174 are arranged between the heating units 150 and the inner wall surface of the box 160. The main body 161 of the box 160 and the plate members 171, 172, 173, and 174 all have a rectangular shape that is elongated in the longitudinal direction of the machine base in a cross section perpendicular to the up-down direction. The main body 161 of the box 160 corresponds to the "plate member" of the present invention.

[0159] The plate members 171, 172, 173, and 174 are arranged facing each other and spaced apart. The plate members 171, 172, 173, and 174 are arranged in a direction away from the heating unit 150 on a virtual plane (e.g., the plane of FIG. 9 ) that is perpendicular to the up-down direction and intersects with the heating unit 150. The plate member 171 arranged on the innermost side surrounds the multiple heating units 150.

[0160] Between the two opposing plate members, inter-plate spaces 175a, 175b, and 175c are formed. Furthermore, between the plate member 174 and the main body 161, an inter-plate space 175d is formed. An air layer is formed in each of these four inter-plate spaces 175a, 175b, 175c, and 175d (175). That is, in a virtual plane (e.g., the plane of FIG. 9) that is perpendicular to the up-down direction and intersects with the heating unit 150, the four air layers formed in each inter-plate space 175 are aligned in a direction away from the heating unit 150.

[0161] As shown in FIG. 10, the upper end of the inter-plate space 175 is sealed by a sealing member 182. The lower end of the inter-plate space 175 is sealed by a sealing member 183. The sealing members 182 and 183 correspond to the "first sealing member" of the present invention. Only one of the sealing members 182 and 183 needs to be provided. At least one of the plurality of 175a, 175b, 175c, and 175d may be sealed by the sealing member 182. At least one of the plurality of 175a, 175b, 175c, and 175d may be sealed by the sealing member 183.

[0162] In the second heating device 19, similarly to the first heating device 13 of the above-described embodiment, it is possible to reduce power consumption without increasing the size of the device.

[0163] Furthermore, in the above embodiment, a case has been described in which both ends in the extension direction of the inter-plate space 75 are sealed by the first sealing member 82, and the lower end of the inter-plate space 75 is sealed by the second sealing member 83, but this is not limited thereto. The first heating device 13 may be provided with only one of the first sealing member 82 and the second sealing member 83. The first heating device 13 may be provided with a sealing member that seals at least a part of the end of the inter-plate space 75.

[0164] In the above embodiment, the case where all inter-plate spaces 75 are sealed has been described. However, the inter-plate spaces 75 do not necessarily have to be sealed. Also, only some of the inter-plate spaces 75 may be sealed.

[0165] Furthermore, in the above embodiment, the first sealing member 82 made of a heat insulating material is used to seal both ends of the inter-plate space 75 in the extension direction, but the present invention is not limited to this. Only one of both ends of the inter-plate space 75 in the extension direction may be sealed by the first sealing member 82. Furthermore, at least one of the multiple inter-plate spaces 75a, 75b, 75c, and 75d may be sealed by the first sealing member 82. The first sealing member 82 does not have to be made of a heat insulating material.

[0166] In the above embodiment, a case has been described in which a plurality of spacer members 81 are arranged in each inter-plate space 75, but this is not limiting. One spacer member 81 may be arranged in each inter-plate space 75. The spacer member 81 may be arranged in only some of the inter-plate spaces 75. In either case, the spacer member 81 does not have to be arranged in any inter-plate space 75.

[0167] Furthermore, in the above embodiment, the spacer members 81 disposed in each of two adjacent inter-plate spaces 75 are disposed at different positions in the extension direction. However, the spacer members 81 disposed in each of two adjacent inter-plate spaces 75 may be disposed at the same position in the extension direction.

[0168] Additionally, in the above embodiment, the bent portions 71c, 72c and 73c, 74c sealing one inter-plate space 75 (75a, 75c) and the spacer member 81 arranged in the other inter-plate space 75 (75b, 75d) are arranged at different positions in the vertical direction in two adjacent inter-plate spaces 75. However, the bent portions 71c, 72c and 73c, 74c and the spacer member 81 arranged in the inter-plate spaces 75b, 75d may be arranged at the same positions in the vertical direction.

[0169] Furthermore, in the above embodiment, the lower ends of the inter-plate spaces 75a and 75c are sealed by the bent portions 71c, 72c, 73c, and 74c, and the lower ends of the inter-plate spaces 75b and 75d are sealed by the second sealing member 83 made of a heat insulating material, but the present invention is not limited to this. That is, for example, no bent portion may be formed, and the lower ends of all the inter-plate spaces 75 may be sealed by the second sealing member 83. Also, for example, no bent portion may be formed, and at least one of the multiple inter-plate spaces 75, 75a, 75b, 75c, and 75d may be sealed by the second sealing member 83. Furthermore, the second sealing member 83 may not be made of a heat insulating material.

[0170] In the above embodiment, the case where one second sealing member 83 seals the lower end of the inter-plate spaces 75b, 75d and covers the surfaces of the bent portions 71c, 73c sealing the inter-plate spaces 75a, 75c has been described, but the present invention is not limited to this. That is, for example, the member sealing the lower end of the inter-plate spaces 75b, 75d and the member covering the surfaces of the bent portions 71c, 73c sealing the inter-plate spaces 75a, 75c may be separate members. Furthermore, among the inter-plate spaces sealed by the bent portions (i.e., the inter-plate spaces 75a, 75c), only the surface of the bent portion 71c sealing the inter-plate space 75a located closest to the heating unit 50 may be covered with the second sealing member 83 made of a heat insulating material. Both surfaces of the bent portions 71c, 73c sealing the inter-plate spaces 75a, 75c may not be covered with the second sealing member 83 made of a heat insulating material.

[0171] Furthermore, in the above embodiment, the bent portions 71c, 72c that seal the inter-plate space 75a and the bent portions 73c, 74c that seal the inter-plate space 75c are located at different positions in the vertical direction. However, the bent portions 71c, 72c and the bent portions 73c, 74c may be located at the same positions in the vertical direction.

[0172] In addition, in the above embodiment, the second sealing member 83 has a portion covering the bent portion 71c with thicknesses Ta1 and Ta2 in the vertical direction that are greater than the thicknesses Tb1 and Tb2 in the vertical direction that are greater than the thicknesses Tb1 and Tb2 in the vertical direction that are greater than the thicknesses Tb2 and Tb2 in the vertical direction. However, the thicknesses Ta1 and Ta2 may be less than or equal to the thicknesses Tb1 and Tb2.

[0173] Furthermore, in the above embodiment, a case has been described in which plate members 72, 73 are fixed to each other at upper walls 72a, 73a by connecting member 84, and plate member 74 and main body 61 of box 60 are fixed to each other at upper walls 74a, 61a by connecting member 85. The fixed portions of plate members 72, 73 (portions connected by connecting member 84) and the fixed portion of plate member 74 and main body 61 of box 60 (portions connected by connecting member 85) are not limited to the upper ends of each member, and may be, for example, the lower ends.

[0174] Furthermore, in the above embodiment, the case where the heat insulating member 80 is disposed between the plate member 71 and the heating section 50 has been described, but the heat insulating member 80 does not necessarily have to be disposed.

[0175] In the above embodiment, four plate members 71, 72, 73, and 74 are disposed between the main body 61 of the box 60 and the heating section 50, and four inter-plate spaces 75 are formed between the plate members 71, 72, 73, and 74 and the main body 61, but the present invention is not limited to this. At least two inter-plate spaces 75 may be formed. In other words, at least three members corresponding to the plate members of the present invention may be formed. Five or more inter-plate spaces 75 may be formed.

[0176] Furthermore, in the above embodiment, the four plate members 71, 72, 73, 74 and the upper wall 61a and two side walls 61b of the main body 61 are not arranged in the region facing the lower end of the yarn running groove 56. However, the present invention is not limited to this. In other words, a plate member forming an inter-plate space may be arranged in the region facing the lower end of the yarn running groove 56. In this case, it is preferable that the plate member arranged in the region facing the lower end of the yarn running groove 56 is configured to be movable from the region or removable from the device.

[0177] In the above embodiment, each of the plate members 71, 72, 73, and 74 extends in the extension direction and has a groove shape that is open downward, but the present invention is not limited to this. That is, for example, the plate members may be flat plates that are not bent.

[0178] In the above embodiment, the opposing surfaces of the two plate members 71, 72 constituting the inter-plate space 75a located closest to the heating unit 50 among the four inter-plate spaces 75 are mirror-finished, but the present invention is not limited to this. Of the opposing surfaces of the two plate members 71, 72, it is preferable that at least the surface defining the inter-plate space 75a of the plate member 71 closest to the heating unit 50 is mirror-finished. The surfaces of all the plate members 71-74 and the main body 61 may be mirror-finished. None of the surfaces of the plate members 71-74 and the main body 61 may be mirror-finished.

[0179] Furthermore, in the above embodiment, the case where the entire yarn running groove 56 is formed in the heating section 50 has been described, but this is not limited thereto. That is, for example, the heating section 50 may define a part of the yarn running groove 56. That is, the heating section 50 may define only the bottom portion of the yarn running groove 56. Also, for example, the heating section 50 may define only the side portion of the yarn running groove 56.

[0180] In the above embodiment, the yarn Y comes into contact with the yarn contact surface 55 in the heating unit 50, and thereby receives heat from the heating block 52 via the yarn contact surface 55. However, the present invention is not limited to this. The heating unit 50 may be of a non-contact type that heats the yarn Y with warm air.

[0181] In addition, in the above embodiment, the heating unit 50 is described as including the heat source 51 and the heating block 52 heated by the heat source 51, but is not limited thereto. For example, the heating unit may have a structure in which a heat medium such as Dowson is circulated inside a hollow member.

[0182] Furthermore, in the above embodiment, the yarn heating device according to the present invention is applied to a false twisting machine 1 that applies false twisting to the yarn Y, but the present invention is not limited to this. The yarn heating device according to the present invention is not limited to false twisting, and can be applied to machines that apply various processes, such as doubling, to yarns made of synthetic fibers. [Explanation of symbols]

[0183] 1 False twisting machine 13 First heating device (yarn heating device) 19 Second heating device (yarn heating device) 50 Heating section 56 Yarn running groove (yarn running passage) 61a Upper wall (plate member) 61b Side wall (plate member) 71, 72, 73, 74 Plate members 71c, 72c bending part (first bending part) 73c, 74c bending part (second bending part) 75, 75a, 75b, 75c, 75d Space between boards 80 Insulation materials 81 Spacer member 82 First sealing member (sealing member) 83 Second sealing member (sealing member, covering member) 84, 85 Connection members 150 Heating section 161 Main body (plate member) 171, 172, 173, 174 Plate members 175, 175a, 175b, 175c, 175d Space between boards 182, 183 Sealing member Y Thread

Claims

1. A thread heating device having a thread travel path formed in which the thread travels, The aforementioned thread travel passage extends along a predetermined direction, and includes a heating section for heating the thread traveling through the thread travel passage, A plurality of plate members arranged facing each other and spaced apart, wherein in a virtual plane perpendicular to the predetermined direction and intersecting the heating section, the plurality of plate members are arranged in a direction away from the heating section, It comprises a sealing member that seals at least a portion of the end of the inter-plate space between two opposing plate members, A yarn heating device characterized in that a plurality of air layers formed in the space between the plates are arranged in a direction away from the heating section on the virtual plane.

2. The yarn heating device according to claim 1, characterized in that the space between the plates is sealed.

3. Each of the aforementioned plate members extends along the predetermined direction, The yarn heating device according to claim 1, characterized in that the sealing member is made of an insulating material and includes a first sealing member that seals both ends in the predetermined direction in the space between the plates.

4. Each of the aforementioned plate members extends along the predetermined direction, The yarn heating device according to claim 2, characterized in that the sealing member is made of an insulating material and includes a first sealing member that seals both ends in the predetermined direction in the space between the plates.

5. The first sealing member has a density of 80 kg / m³ 3 The yarn heating device according to claim 3, characterized in that it is as described above.

6. The yarn heating device according to claim 1, further comprising spacer members arranged in the spaces between each of the aforementioned plates.

7. The yarn heating device according to claim 2, further comprising spacer members arranged in the spaces between each of the aforementioned plates.

8. The yarn heating device according to claim 3, further comprising spacer members arranged in the spaces between each of the aforementioned plates.

9. The thread heating device according to claim 6, characterized in that the spacer members, each positioned in the two adjacent spaces between the plates, are positioned at different locations with respect to the predetermined direction.

10. The thread heating device according to claim 7, characterized in that the spacer members, each placed in the two adjacent spaces between the plates, are positioned at different locations with respect to the predetermined direction.

11. The thread heating device according to claim 8, characterized in that the spacer members, each positioned in the two adjacent spaces between the plates, are positioned at different locations with respect to the predetermined direction.

12. At least one end of the inter-board space in a direction perpendicular to the predetermined direction is sealed by a bent portion formed by bending the end of the two plate members constituting the inter-board space in the direction perpendicular to the predetermined direction. The yarn heating device according to claim 6, characterized in that, in two adjacent spaces between plates, the bent portion that seals one of the spaces between plates and the spacer member placed in the other space between plates are positioned at different locations with respect to the orthogonal direction.

13. At least one end of the inter-board space in a direction perpendicular to the predetermined direction is sealed by a bent portion formed by bending the end of the two plate members constituting the inter-board space in the direction perpendicular to the predetermined direction. The yarn heating device according to claim 7, characterized in that, in two adjacent spaces between plates, the bent portion that seals one of the spaces between plates and the spacer member placed in the other space between plates are positioned at different locations with respect to the orthogonal direction.

14. At least one end of the inter-board space in a direction perpendicular to the predetermined direction is sealed by a bent portion formed by bending the end of the two plate members constituting the inter-board space in the direction perpendicular to the predetermined direction. The yarn heating device according to claim 8, characterized in that, in two adjacent spaces between plates, the bent portion that seals one of the spaces between plates and the spacer member placed in the other space between plates are positioned at different locations with respect to the orthogonal direction.

15. The yarn heating device according to claim 12, characterized in that the bent portion functions as a spacer to secure the distance between the two plate members.

16. The yarn heating device according to claim 13, characterized in that the bent portion functions as a spacer to secure the distance between the two plate members.

17. The yarn heating device according to claim 14, characterized in that the bent portion functions as a spacer to secure the distance between the two plate members.

18. When three adjacent plate members among the plurality of plate members are designated as the first plate member, the second plate member, and the third plate member, The one end of the inter-plate space between the first plate member and the second plate member in the orthogonal direction is sealed by the bent portion formed by bending the one end of the first plate member and the second plate member in the orthogonal direction. The yarn heating device according to claim 12, characterized in that the sealing member is made of an insulating material and includes a second sealing member that seals one end in the orthogonal direction in the inter-plate space between the second plate member and the third plate member.

19. When three adjacent plate members among the plurality of plate members are designated as the first plate member, the second plate member, and the third plate member, The one end of the inter-plate space between the first plate member and the second plate member in the orthogonal direction is sealed by the bent portion formed by bending the one end of the first plate member and the second plate member in the orthogonal direction. The yarn heating device according to claim 13, characterized in that the sealing member is made of an insulating material and includes a second sealing member that seals one end in the orthogonal direction in the inter-plate space between the second plate member and the third plate member.

20. When three adjacent plate members among the plurality of plate members are designated as the first plate member, the second plate member, and the third plate member, The one end of the inter-plate space between the first plate member and the second plate member in the orthogonal direction is sealed by the bent portion formed by bending the one end of the first plate member and the second plate member in the orthogonal direction. The yarn heating device according to claim 14, characterized in that the sealing member is made of an insulating material and includes a second sealing member that seals one end in the orthogonal direction in the inter-plate space between the second plate member and the third plate member.

21. When two of the three adjacent spaces between the plates, the space closest to the heating element and the space furthest from the heating element, are sealed by the bent portion, The yarn heating device according to claim 18, characterized in that the bent portions that seal the spaces between the two plates are in different positions with respect to the orthogonal direction.

22. When two of the three adjacent spaces between the plates, the space closest to the heating element and the space furthest from the heating element, are sealed by the bent portion, The yarn heating device according to claim 19, characterized in that the bent portions that seal the spaces between the two plates are in different positions with respect to the orthogonal direction.

23. When two of the three adjacent spaces between the plates, the space closest to the heating element and the space furthest from the heating element, are sealed by the bent portion, The yarn heating device according to claim 20, characterized in that the bent portions that seal the spaces between the two plates are in different positions with respect to the orthogonal direction.

24. The yarn heating device according to claim 18, further comprising a covering member made of insulating material, which covers the surface of the bent portion opposite to the inter-board space side, sealing at least the inter-board space located closest to the heating portion among the inter-board spaces sealed by the bent portion.

25. The yarn heating device according to claim 19, further comprising a covering member made of insulating material, which covers the surface of the bent portion opposite to the inter-board space side, sealing at least the inter-board space located closest to the heating portion among the inter-board spaces sealed by the bent portion.

26. The yarn heating device according to claim 20, further comprising a covering member made of insulating material, which covers the surface of the bent portion opposite to the inter-board space side, sealing at least the inter-board space located closest to the heating portion among the inter-board spaces sealed by the bent portion.

27. The yarn heating device according to claim 24, characterized in that the second sealing member also serves as the covering member.

28. The yarn heating device according to claim 25, characterized in that the second sealing member also serves as the covering member.

29. The yarn heating device according to claim 26, characterized in that the second sealing member also serves as the covering member.

30. The yarn heating device according to claim 27, characterized in that the second sealing member seals one end in the orthogonal direction of all inter-plate spaces that are not sealed by the bent portion, and covers the surface of the bent portion opposite to the inter-plate space side of all inter-plate spaces that are sealed by the bent portion.

31. The yarn heating device according to claim 28, characterized in that the second sealing member seals one end in the orthogonal direction of all inter-board spaces that are not sealed by the bent portion, and covers the surface of the bent portion opposite to the inter-board space side of all inter-board spaces that are sealed by the bent portion.

32. The yarn heating device according to claim 29, characterized in that the second sealing member seals one end in the orthogonal direction of all inter-plate spaces that are not sealed by the bent portion, and covers the surface of the bent portion opposite to the inter-plate space side of all inter-plate spaces that are sealed by the bent portion.

33. Each of the aforementioned plate members covers the entire heating section with respect to the orthogonal direction, Of the inter-plate spaces sealed by the aforementioned bent portions, the first bent portion that seals the inter-plate space closest to the heating portion is located closer to the heating portion in the orthogonal direction than the second bent portion that seals the other inter-plate spaces. The yarn heating device according to claim 27, characterized in that the thickness of the portion of the second sealing member that covers the first bent portion in the direction perpendicular to the first bent portion is greater than the thickness of the portion of the second bent portion that covers the second bent portion in the direction perpendicular to the first bent portion.

34. Each of the aforementioned plate members covers the entire heating section with respect to the orthogonal direction, Of the inter-plate spaces sealed by the aforementioned bent portions, the first bent portion that seals the inter-plate space closest to the heating portion is located closer to the heating portion in the orthogonal direction than the second bent portion that seals the other inter-plate spaces. The yarn heating device according to claim 28, characterized in that the thickness of the portion of the second sealing member that covers the first bent portion in the direction perpendicular to the first bent portion is greater than the thickness of the portion of the second bent portion that covers the second bent portion in the direction perpendicular to the first bent portion.

35. Each of the aforementioned plate members covers the entire heating section with respect to the orthogonal direction, Of the inter-plate spaces sealed by the aforementioned bent portions, the first bent portion that seals the inter-plate space closest to the heating portion is located closer to the heating portion in the orthogonal direction than the second bent portion that seals the other inter-plate spaces. The yarn heating device according to claim 29, characterized in that the thickness of the portion of the second sealing member that covers the first bent portion in the direction perpendicular to the first bent portion is greater than the thickness of the portion of the second bent portion that covers the second bent portion in the direction perpendicular to the first bent portion.

36. The system further includes connecting members for connecting the aforementioned plate members, The first plate member and the second plate member are fixed to each other at the bent portion. The yarn heating device according to any one of claims 18 to 35, characterized in that the second plate member and the third plate member are fixed to each other by the connecting member at the end on the other side opposite to the one side in the orthogonal direction.

37. The yarn heating device according to any one of claims 1 to 17, characterized in that the sealing member is made of an insulating material and includes a second sealing member that seals one end in the orthogonal direction perpendicular to the predetermined direction in the space between the plates.

38. The second sealing member has a density of 80 kg / m³ 3 The yarn heating apparatus according to any one of claims 18 to 35, characterized in that it is as described above.

39. The yarn heating apparatus according to any one of claims 1 to 35, characterized in that the thickness of the air layer is 5 mm or more and less than 15 mm.

40. The yarn heating apparatus according to claim 36, characterized in that the thickness of the air layer is 5 mm or more and less than 15 mm.

41. The yarn heating apparatus according to claim 37, characterized in that the thickness of the air layer is 5 mm or more and less than 15 mm.

42. The yarn heating device according to any one of claims 1 to 35, further comprising a heat insulating member disposed between the plate member that is positioned closest to the heating section among the plurality of plate members and the heating section.

43. The yarn heating device according to claim 36, further comprising a heat insulating member disposed between the plate member that is positioned closest to the heating section among the plurality of plate members and the heating section.

44. The yarn heating device according to claim 37, further comprising a heat insulating member disposed between the plate member that is positioned closest to the heating section among the plurality of plate members and the heating section.

45. The yarn heating device according to claim 39, further comprising a heat insulating member disposed between the plate member that is positioned closest to the heating section among the plurality of plate members and the heating section.

46. The yarn heating device according to any one of claims 1 to 35, characterized in that the yarn running passage is defined in at least a portion of the heating section and is a yarn running groove that is open in an open direction perpendicular to the predetermined direction.

47. The yarn heating device according to claim 36, characterized in that the yarn running passage is defined in at least a portion of the heating section and is a yarn running groove that is open in an open direction perpendicular to the predetermined direction.

48. The yarn heating device according to claim 37, characterized in that the yarn running passage is defined in at least a portion of the heating section and is a yarn running groove that is open in an open direction perpendicular to the predetermined direction.

49. The yarn heating device according to claim 39, characterized in that the yarn running passage is defined in at least a portion of the heating section and is a yarn running groove that is open in an open direction perpendicular to the predetermined direction.

50. The yarn heating device according to claim 42, characterized in that the yarn running passage is defined in at least a portion of the heating section and is a yarn running groove that is open in an open direction perpendicular to the predetermined direction.

51. The yarn heating device according to claim 45, characterized in that the yarn running passage is defined in at least a portion of the heating section and is a yarn running groove that is open in an open direction perpendicular to the predetermined direction.

52. The yarn heating device according to claim 46, characterized in that the plurality of plate members are not arranged in the region of the yarn running groove facing the open end in the open direction.

53. The yarn heating device according to claim 49, characterized in that the plurality of plate members are not arranged in the region of the yarn running groove facing the open end in the open direction.

54. The yarn heating device according to claim 50, characterized in that the plurality of plate members are not arranged in the region of the yarn running groove facing the open end in the open direction.

55. The yarn heating device according to claim 51, characterized in that the plurality of plate members are not arranged in the region of the yarn running groove facing the open end in the open direction.

56. Each of the plate members extends along the predetermined direction and has a groove shape that is open in the opening direction. The yarn heating device according to claim 52, characterized in that the plurality of plate members are arranged in a nested manner, and the innermost plate member is arranged to surround the heating section.

57. Each of the plate members extends along the predetermined direction and has a groove shape that is open in the opening direction. The yarn heating device according to claim 53, characterized in that the plurality of plate members are arranged in a nested manner, and the innermost plate member is arranged to surround the heating section.

58. Each of the plate members extends along the predetermined direction and has a groove shape that is open in the opening direction. The yarn heating device according to claim 54, characterized in that the plurality of plate members are arranged in a nested manner, and the innermost plate member is arranged to surround the heating section.

59. Each of the plate members extends along the predetermined direction and has a groove shape that is open in the opening direction. The yarn heating device according to claim 55, characterized in that the plurality of plate members are arranged in a nested manner, and the innermost plate member is arranged to surround the heating section.

60. The thread heating device according to any one of claims 1 to 35, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

61. The thread heating device according to claim 36, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

62. The thread heating device according to claim 37, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

63. The thread heating device according to claim 39, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

64. The thread heating device according to claim 42, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

65. The thread heating device according to claim 45, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

66. The thread heating device according to claim 46, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

67. The thread heating device according to claim 49, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

68. The thread heating device according to claim 50, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

69. The thread heating device according to claim 51, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

70. The thread heating device according to claim 52, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

71. The thread heating device according to claim 53, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

72. The thread heating device according to claim 54, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

73. The thread heating device according to claim 55, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

74. The thread heating device according to claim 56, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

75. The thread heating device according to claim 57, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

76. The thread heating device according to claim 58, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

77. The thread heating device according to claim 59, characterized in that, of the two plate members constituting the inter-plate space located closest to the heating section among a plurality of inter-plate spaces, at least the surface of the plate member closer to the heating section is mirror-finished.

78. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with a yarn heating device according to any one of claims 1 to 35.

79. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 36.

80. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 37.

81. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 38.

82. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 39.

83. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 40.

84. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 41.

85. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 42.

86. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 43.

87. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 44.

88. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 45.

89. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 46.

90. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 47.

91. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 48.

92. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 49.

93. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 50.

94. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 51.

95. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 52.

96. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 53.

97. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 54.

98. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 55.

99. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 56.

100. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 57.

101. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 58.

102. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 59.

103. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 60.

104. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 61.

105. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 62.

106. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 63.

107. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 64.

108. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 65.

109. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 66.

110. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 67.

111. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 68.

112. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 69.

113. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 70.

114. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 71.

115. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 72.

116. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 73.

117. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 74.

118. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 75.

119. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 76.

120. A false twisting machine for applying a false twisting process to yarn, A false twisting machine characterized by being equipped with the yarn heating device described in claim 77.

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