Yarn winding device and automatic winder

Abstract

To provide a yarn winding device with improved heat dissipation and static elimination effects.SOLUTION: A yarn winding device 10 includes a winding unit 2, a circuit board 80, a power supply device 81, a plate member 70, and a housing 60. The winding unit 2 performs a winding operation to wind a yarn 11 and form a package 23. The circuit board 80 constitutes a control unit 55 that controls the winding unit 2 and has electronic components mounted thereon. The power supply device 81 supplies power to the circuit board 80. The power supply device 81 is disposed on the plate member 70. At least some of the components of the housing 60 are made of resin. The housing 60 encloses a space that houses the circuit board 80, the power supply device 81, and the plate member 70. The plate member 70 has a conductive base material layer and a radiation layer formed on the outer surface of the base material layer. The radiation layer has a higher thermal emissivity than the base material layer.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a yarn winding device and an automatic winder. [Background technology]

[0002] Yarn winding devices that wind a yarn to form a package are known. The yarn winding device includes a control device for controlling the winding of the yarn. The electronic components, such as a CPU, and the circuit board on which the electronic components are mounted, that constitute the control device are subject to deterioration due to heat and static electricity. For this reason, it is necessary to dissipate heat and remove static electricity from the circuit board, etc.

[0003] The water-cooling device in Patent Document 1 has a cooling plate attached to each electronic component to cool a system board (substrate) on which multiple electronic components are mounted. Cooling water flows inside the cooling plate as a refrigerant. The water-cooling device cools the electronic components via the cooling plate using the cooling water. The water-cooling device also has a heat-absorbing member to increase the amount of heat absorbed by the cooling plate and a heat-dissipating member to increase emissivity.

[0004] In a yarn winding device, the space in which the control device is installed must be sealed to prevent damage to the circuit board, etc., due to fly dust. For this reason, it is not possible to circulate air using a fan or the like to dissipate heat through heat transfer. Furthermore, there is little space available for installing the control device, making it difficult to install a water cooling device such as that described in Patent Document 1.

[0005] Conventionally, a control device for a yarn winding device is disposed inside a housing made of metal (for example, aluminum die-cast). Because metal housings have high thermal and electrical conductivity, heat dissipation and static elimination from circuit boards, power supply components, etc., through the housing are possible by thermal conduction. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5920356 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in recent years, in order to reduce costs and the weight of yarn winding devices, some casings are made of resin. However, because resin casings have low thermal conductivity and electrical conductivity, the heat dissipation effect and static elimination effect via the casing are low.

[0008] An object of the present invention is to improve the heat dissipation effect and the static elimination effect in a yarn winding device having a housing partly made of resin. [Means for solving the problem]

[0009] Below, several aspects will be described as means for solving the problems. These aspects can be arbitrarily combined as necessary.

[0010] The yarn winding device of the present disclosure includes a winding unit, a circuit board, a power supply unit, a plate member, and a housing. The winding unit performs a winding operation to wind the yarn and form a package. The circuit board constitutes a control unit that controls the winding unit and has electronic components mounted thereon. The power supply unit supplies power to the circuit board. The power supply unit is disposed on the plate member. At least a portion of the components of the housing are made of resin. The housing encloses a space that houses the circuit board, the power supply unit, and the plate member. The plate member has a conductive base material layer and a radiation layer formed on the outer surface of the base material layer. The radiation layer has a higher thermal emissivity than the base material layer.

[0011] In this yarn winding device, a radiation layer with a high thermal emissivity is formed on the outer surface of the base material layer of the plate member, thereby improving the heat dissipation effect on the circuit board and the power supply unit.

[0012] In the above-described yarn winding device, the radiation layer may be plated, thereby improving the durability of the plate member.

[0013] In the above yarn winding device, the radiation layer may be conductive, thereby enhancing the effect of eliminating static electricity from the power supply unit.

[0014] In the above-described yarn winding device, the radiation layer may be electrogalvanized. Because electrogalvanized plating has high electrical conductivity, it can further enhance the static elimination effect on the power supply unit. Furthermore, because electrogalvanized plating has high thermal emissivity, it can further enhance the heat dissipation effect on the circuit board and the power supply unit.

[0015] In the above-described yarn winding device, the radiation layer may be black chrome plated. Black chrome plating has high conductivity, which can further enhance the static elimination effect on the power supply unit. Furthermore, black chrome plating has high thermal emissivity, which can further enhance the heat dissipation effect on the circuit board and the power supply unit.

[0016] In the above-described yarn winding device, the circuit board may be connected to the plate member via a ground connection, thereby achieving a charge removal effect on the circuit board.

[0017] In the above-described yarn winding device, when the surface of the component that constitutes the housing that has the largest area is viewed in the longitudinal direction, the plate member may be a single plate that is long in the vertical direction, thereby reinforcing the strength of the housing.

[0018] The automatic winder of the present disclosure includes a plurality of yarn winding devices of the present disclosure. [Effects of the Invention]

[0019] According to the yarn winding device or automatic winder of the present disclosure, the heat dissipation effect and static elimination effect for circuit boards, power supply components, etc. are improved. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 2 is a diagram showing the configuration of an automatic winder. [Figure 2] FIG. 2 is a diagram illustrating a configuration of a yarn winding device. [Figure 3]FIG. 4 is a view showing the inside of the control unit as seen from the right side of the yarn winding device. [Figure 4] FIG. 2 is a perspective view of the exterior of the housing of the yarn winding device, seen from diagonally above to the right. [Figure 5] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] 1. First embodiment (1) Automatic winder Fig. 1 is a diagram showing the configuration of an automatic winder 1. In Fig. 1, Fig. 3, and Fig. 4, the directions when the automatic winder 1 is viewed from the front side are indicated by arrows of front, rear, top, bottom, left, and right.

[0022] The automatic winder 1 includes a plurality of yarn winding devices 10 arranged side by side. Each yarn winding device 10 unwinds a yarn 11 from a yarn supplying bobbin 20 and traverses the yarn 11 to form a package 23. The configuration and operation of the yarn winding device 10 will be described later.

[0023] The automatic winder 1 includes a machine control device 12. The machine control device 12 is capable of communicating with the control unit 55 of each yarn winding device 10. An operator of the automatic winder 1 can collectively manage multiple yarn winding devices 10 by appropriately operating the machine control device 12. The machine control device 12 is provided with a display 12a and an input interface 12b. The display 12a displays information related to the settings and / or status of the yarn winding device 10. The operator can perform settings on the yarn winding device 10 by appropriately operating the input interface 12b.

[0024] The display 12a is, for example, a display device such as a liquid crystal display. The input interface 12b is an input device such as an input key, a touch panel, etc. The display 12a and the input interface 12b, which is a touch panel, may be integrated.

[0025] The automatic winder 1 is equipped with a doffing device 13. When the package 23 in each yarn winding device 10 becomes full (a specified amount of yarn is wound), the doffing device 13 travels to the position of the yarn winding device 10, removes the full package, and sets an empty winding bobbin.

[0026] (2) Thread winding device FIG. 2 is a diagram showing the configuration of the yarn winding device 10. The yarn winding device 10 includes a winding unit 2 and a control unit 50 that controls the winding unit 2. The winding unit 2 performs a winding operation to wind the yarn 11 unwound from a yarn supplying bobbin 20 onto the surface of a winding tube 22 to form a package 23. Note that although the yarn winding device 10 according to this embodiment is a drum-type yarn winding device 10, the yarn winding device 10 may also be an arm traverse-type winding device or a belt traverse-type winding device. Furthermore, although the yarn winding device 10 according to this embodiment is mounted on an automatic winder 1, the yarn winding device 10 may also be mounted on, for example, an air spinning frame or an open-end spinning frame.

[0027] (2-1) Winding unit As shown in FIG. 2, the winding unit 2 includes, in order from the yarn supplying bobbin 20 to the winding tube 22, a yarn unwinding assisting device 26, a tensioning device 27, a yarn joining device 28, a clearer 29 (yarn quality measuring device), a waxing device 30, a cleaning pipe 31, and a package forming device 32 as main components.

[0028] The yarn unwinding assist device 26 regulates the swelling (balloon) of the yarn 11 during unwinding and stabilizes the unwinding tension. The yarn unwinding assist device 26 has a movable cylinder 33 that is placed over the yarn supplying bobbin 20. As the unwinding of the yarn 11 progresses, the movable cylinder 33 is lowered to regulate the swelling (balloon) of the yarn 11 during unwinding and stabilize the unwinding tension.

[0029] The tensioning device 27 applies a predetermined tension to the traveling yarn 11. For example, a gate-type tensioning device 27 can be used, in which movable comb teeth 27b are arranged relative to fixed comb teeth 27a. The movable comb teeth 27b are configured so that the comb teeth can be in an interlocked or disengaged state. By passing the yarn 11 between the interlocked comb teeth while bending it, a constant tension can be applied to the yarn 11 being wound, improving the quality of the package 23. Note that, in addition to the gate-type tensioning device 27, a disk-type tensioning device, for example, can also be used.

[0030] The yarn splicing device 28 splices the yarn 11 on the yarn supplying bobbin 20 side with the yarn 11 on the package 23 side when the clearer 29 detects a yarn defect and cuts the yarn, or when the yarn breaks while being unwound from the yarn supplying bobbin 20. The yarn splicing device 28 is, for example, a splicer device that twists the yarn ends together using a swirling air flow generated by compressed air.

[0031] The clearer 29 monitors the state of the yarn 11 traveling along the yarn travel path and detects the presence or absence of a yarn defect based on the monitored information. The clearer 29 includes a clearer head 29a and an analyzer (not shown). A sensor for detecting the thickness of the yarn 11 is disposed in the clearer head 29a. The analyzer processes a yarn thickness signal from the sensor. The clearer 29 is configured to detect yarn defects such as slub by monitoring the yarn thickness signal from the sensor. A cutter 29b is provided near the clearer head 29a to immediately cut the yarn 11 when the clearer 29 detects a yarn defect.

[0032] A first catching unit 34 is provided upstream of the yarn splicing device 28 in the running direction of the yarn 11 during yarn winding, and a second catching unit 35 is provided downstream. When the yarn 11 is cut, the first catching unit 34 catches the yarn 11 on the yarn supply bobbin 20 side and guides it to the yarn splicing device 28. When the yarn 11 is cut, the second catching unit 35 catches the yarn 11 on the package 23 side and guides it to the yarn splicing device 28. The first catching unit 34 and the second catching unit 35 are configured to be rotatable about shafts 34a and 35a, respectively. A suction port 34b is formed at the tip of the first catching unit 34, and a suction mouth 35b is provided at the tip of the second catching unit 35. A negative pressure source (not shown) is connected to the first catching unit 34 and the second catching unit 35, respectively, and a suction flow is generated at the suction port 34b and the suction mouth 35b, so that the yarn end can be sucked and caught.

[0033] The waxing device 30 is a device that applies an appropriate amount of wax to the running yarn 11.

[0034] The cleaning pipe 31 is a device that sucks and removes foreign matter adhering to the traveling yarn 11. The base end of the cleaning pipe 31 is connected to a blower via a shutter device (not shown), and a suction port is formed at the tip of the cleaning pipe 31. The suction port of the cleaning pipe 31 is placed close to the yarn 11 traveling between the waxing device 30 and the winding drum 21.

[0035] The package forming device 32 includes a cradle 24, a take-up tube 22, and a take-up drum 21 as its main components.

[0036] The cradle 24 is configured to be rotatable around a rotation axis 25. The cradle 24 holds the package 23 from both ends in the length direction, thereby supporting the package 23 so that the package 23 is rotatable around a predetermined axis. The winding drum 21 is a cylindrical member that is driven to rotate around its axis by the first motor 21 m. When the winding drum 21 is driven to rotate with the outer periphery of the package 23 in contact with the winding drum 21, a driving force is imparted to the package 23, causing the package 23 to rotate in accordance with the rotation of the winding drum 21.

[0037] A spiral traverse groove is formed on the cylindrical side surface of the winding drum 21. While the winding drum 21 is driven to rotate, the package 23 is rotated, and at the same time, the yarn 11 unwound from the yarn supplying bobbin 20 is traversed at a constant width on the surface of the package 23 by the traverse groove. As a result, the yarn 11 supplied by being unwound from the yarn supplying bobbin 20 is wound while traversing on the surface of the package 23. As a result, the package 23 having a constant winding width is formed.

[0038] (2-2) Control unit 1, the control unit 50 is installed on the right side of the winding unit 2 to be controlled. However, the installation position of the control unit 50 in FIG. 1 is just an example, and the installation position is not limited as long as it is near the winding unit 2 to be controlled.

[0039] 3 is a view showing the inside of a housing 60 constituting the control unit 50 as seen from the right side of the yarn winding device 10. As shown in Fig. 3, the control unit 50 mainly comprises the housing 60, a plate member 70, a circuit board 80 on which electronic components are mounted, and a power supply device (power supply unit) 81 that supplies power to the circuit board 80. The control unit 50 also has legs 61 that come into contact with the lower surface of the housing 60. The housing 60 is attached to the upper surface of the legs 61, and supports the housing 60.

[0040] (2-2-1) Housing 3, the housing 60 encloses a space that houses the circuit board 80, the power supply device 81, and the plate member 70. In other words, the circuit board 80, the power supply device 81, and the plate member 70 are surrounded by the housing 60 and housed inside the housing 60.

[0041] FIG. 4 is a perspective view showing the exterior of the housing 60. When viewed from the front of the automatic winder 1, the housing 60 is mainly composed of a first surface 60a, which is the left side surface, a second surface 60b, which is the rear side surface, a third surface 60c, which is the front side surface, a fourth surface 60e, which is the upper side surface, a fifth surface 60f, which is the lower side surface, and a sixth surface 60g, which is the right side surface. The third surface 60c may have an inclined portion 60d. The first surface 60a and the sixth surface 60g are the surfaces with the largest areas among the components that make up the housing 60. In this embodiment, the components of the first surface 60a, the second surface 60b, the third surface 60c, the fourth surface 60e, and the fifth surface 60f are made of resin. This allows for cost reduction and weight reduction of the yarn winding device 10.

[0042] In this embodiment, the sixth surface 60g is made of a metal. The sixth surface 60g is made of a metal such as iron, stainless steel (SUS), or aluminum. This allows the sixth surface 60g to enhance the heat dissipation effect and static electricity removal effect within the housing 60. It is also preferable that the sixth surface 60g is painted on both the inner and outer surfaces of the housing 60. Painting increases the thermal emissivity, thereby improving the heat dissipation effect from within the housing 60 to the outside.

[0043] (2-2-2) Plate member As shown in FIG. 3, the plate member 70 is disposed on the right side of the first surface 60a (the rear side when viewed from the front of the automatic winder 1) so as to be approximately parallel to the first surface 60a. The plate member 70 is attached to the first surface 60a, for example, with screws. FIG. 5 is a view of the plate member 70 as viewed from the front. When viewed from the longitudinal direction of the first surface 60a, the plate member 70 is composed of a single plate (first plate portion 71) that is long vertically. A housing 60 that is partially made of resin has lower strength than a housing that is entirely made of metal. By configuring the first plate portion 71 as described above, the strength of the housing 60 can be increased and deformation can be suppressed.

[0044] The plate member 70 may further have a second plate portion 72. In this embodiment, the second plate portion 72 is a plate member 70 that extends in the short direction of the housing 60 from the long side surface of the first plate portion 71. The second plate portion 72 is attached to the first plate portion 71 by, for example, screws 74. The second plate portion 72 also has screw holes 73 for attaching an earth. Note that the screw holes 73 for attaching an earth may also be provided in the first plate portion 71.

[0045] Hereinafter, the first plate portion 71 and the second plate portion 72 will be collectively referred to as the plate member 70.

[0046] The plate member 70 has a base material layer made of metal. The base material layer is made of metal such as iron, stainless steel (SUS), or aluminum. The material of the base material layer is not limited to the above, and any electrically conductive material may be used.

[0047] Furthermore, the plate member 70 has a radiation layer formed on the outer surface of the base material layer. Specifically, the plate member 70 has radiation layers formed on both the surface of the base material layer on which the power supply device 81 is attached and the back surface facing the first plate portion 71. The radiation layer is made of a material with a higher thermal emissivity than the base material layer. Specifically, the radiation layer is a conductive plating. In this embodiment, the radiation layer is, for example, electrogalvanized. Electrogalvanized plating has high conductivity because it is performed while passing electricity through the plating process. Furthermore, the thermal emissivity is higher than that of the polished surface of the metallic material that is the base material layer. The radiation layer is not limited to conductive zinc plating, but may also be black chrome plating. Black chrome plating, like electrogalvanized plating, has high conductivity. Furthermore, by coloring both surfaces of the plate member 70 black, the thermal emissivity can be further increased. With this configuration, heat from the plate member 70 can be dissipated to the housing 60 by radiation.

[0048] (2-2-3) Control Unit The control unit 55 is composed of one or more circuit boards 80. The control unit 55 is connected to the machine control device 12 so as to be able to exchange control signals and information with the machine control device 12. The control unit 55 is also connected to be able to communicate with sensors that detect the position and state of the yarn 11, sensors and switches that detect the state of each device in the winding unit 2, and the like. The control unit 55 controls the operation of each device that constitutes the winding unit 2 based on control signals from the machine control device 12. In this way, the control unit 55 controls the winding operation by the winding unit 2.

[0049] The control unit 55 is a computer system having a processor (e.g., a CPU), a storage device (e.g., a ROM, a RAM, a HDD, an SSD, etc.), and various interfaces (e.g., an A / D converter, a D / A converter, a communication interface, etc.) The control unit 55 performs various control operations by executing programs stored in the storage device (corresponding to part or all of the storage area of ​​the storage device).

[0050] A circuit board 80 on which electronic components such as a processor that constitute the control unit 55 are mounted is attached to the first surface 60a of the housing 60 by, for example, screws. The circuit board 80 is attached to the plate member 70 by fitting screws 82 into screw holes 73 for attaching an earth to the plate member 70. The circuit board 80 is connected to the plate member 70 via the screws 82. This makes it possible to remove static electricity that has accumulated on the circuit board 80.

[0051] The circuit board 80, through which a high current of AV200V flows, may be attached to the second plate portion 72. In this case, the mounting surface of the second plate portion 72 and the mounting surface of the circuit board 80 are in surface contact with each other. By mounting the circuit board 80 in surface contact with the conductive second plate portion 72, a stable ground can always be obtained. In addition, heat generated by the electronic components mounted on the circuit board 80 and by the circuit board 80 can be dissipated to the plate member 70 via the aluminum base of the circuit board 80.

[0052] A power supply device (power supply unit) 81 such as a DC / DC converter that supplies power to the circuit board 80 and a power supply device that supplies power to the first motor 21m that rotates and drives the take-up drum 21 are attached to the first plate portion 71 of the plate member 70 with, for example, screws. At this time, the mounting surface of the plate member 70 and the mounting surface of the power supply device 81 are in surface contact with each other. Because high power flows through the power supply device 81, a stable ground is required. For this reason, the power supply device 81 has an earth wiring that is connected to a static elimination device. Since the plate member 70 is attached in surface contact with the power supply device 81, a stable ground can always be established. This allows the aforementioned power supply devices to neutralize the electrostatic force charged to the power supply device 81 via the plate member 70. In addition, heat generated by the power supply device 81 can be dissipated to the plate member 70.

[0053] 2. Features of the embodiment The first embodiment has the following configuration and functions. (1) The yarn winding device 10 includes a winding unit 2, a circuit board 80, a power supply device 81, a plate member 70, and a housing 60. The winding unit 2 performs a winding operation to wind the yarn 11 and form a package 23. The circuit board 80 constitutes a control unit 55 that controls the winding unit 2, and has electronic components mounted thereon. The power supply device 81 supplies power to the circuit board 80. The power supply device 81 is disposed on the plate member 70. At least a portion of the components of the housing 60 are made of resin. The housing 60 encloses a space that houses the circuit board 80, the power supply device 81, and the plate member 70. The plate member 70 has a conductive base material layer and a radiation layer formed on the outer surface of the base material layer. The radiation layer has a higher thermal emissivity than the base material layer.

[0054] With this configuration, heat generated by the electronic components mounted on the circuit board 80, the circuit board 80, and the power supply device 81 is dissipated to the plate member 70. The heat from the plate member 70 is dissipated to the housing 60 by radiation, and then dissipated to the outside of the housing 60. In this yarn winding device 10, a radiation layer with high thermal emissivity is formed on the outer surface of the base material layer of the plate member 70, and therefore the heat dissipation effect for the circuit board 80 and the power supply device 81 can be improved.

[0055] (2) In the above-described yarn winding device 10, the radiation layer may be plated. By plating the outer surface of the base material layer, the durability of the plate member 70 is improved.

[0056] (3) In the above-described yarn winding device 10, the radiation layer may be electrically conductive. When the outer surface of the base material layer is electrically conductive, the static elimination effect on the power supply device 81 can be improved.

[0057] (4) In the above-described yarn winding device 10, the radiation layer may be electrogalvanized. Electrogalvanized coating has high conductivity, which can further enhance the static elimination effect on the power supply device 81. Furthermore, electrogalvanized coating has high thermal emissivity, which can further enhance the heat dissipation effect on the circuit board 80 and the power supply device 81.

[0058] (5) In the above-described yarn winding device 10, the radiation layer may be black chrome plated. Black chrome plating has high conductivity, which can further enhance the static elimination effect on the power supply device 81. In addition, black chrome plating has high thermal emissivity, which can further enhance the heat dissipation effect on the circuit board 80 and the power supply device 81.

[0059] (6) In the above-described yarn winding device 10, the circuit board 80 may be earthed to the plate member 70. This makes it possible to obtain a neutralizing effect on the circuit board 80.

[0060] (7) In the yarn winding device 10 described above, when the first surface 60a, which has the largest area among the components constituting the housing 60, is viewed in the longitudinal direction, the plate member 70 may be a single plate that is long in the vertical direction. This can reinforce the strength of the housing 60.

[0061] (8) The automatic winder 1 has a plurality of the yarn winding devices 10 described above.

[0062] 3. Variations (1) In this embodiment, the plate member 70 has a radiation layer that is electrogalvanized on both the front surface of the base material layer, which is the side on which the power supply device 81 is attached, and the back surface, which is the side facing the first plate portion 71. However, the plate member 70 may have a radiation layer that is electrogalvanized only on the front surface. Since the front surface needs to be grounded to the power supply device 81, conductive plating is preferable. The back surface may be painted with a high emissivity. This can improve the heat dissipation effect and static elimination effect.

[0063] (2) In this embodiment, the first plate portion 71 is configured from a single plate (first plate portion 71) that is long in the vertical direction when the first surface 60a is viewed in the longitudinal direction. However, the first plate portion 71 may be configured from one or more multiple members.

[0064] 4. Other Embodiments Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible within the scope of the gist of the invention. In particular, the multiple embodiments and modifications described in this specification can be arbitrarily combined as necessary. [Industrial Applicability]

[0065] The yarn winding device of the present disclosure can be applied to automatic winders that use multiple yarn winding devices arranged side by side, air spinning frames, and open-end spinning frames.The yarn winding device of the present disclosure can also be applied to textile machines that manufacture a wide variety of fibers. [Explanation of symbols]

[0066] 1 Automatic winder 2 Winding unit 10 Thread winding device 11 Thread 12 Machine control device 12a Display 12b input interface 13 Doffing device 20 Yarn supply bobbin 21 Winding drum 21m First motor 22 Winding tube 23 packages 24 Cradle 25 Rotating Axis 26 Yarn unwinding auxiliary device 27 Tensioning device 27a comb teeth 27b comb teeth 28 Yarn splicing device 29 Cleara 29a Clear Head 29b Cutter 30 Waxing device 31 Cleaning Pipe 32 Package forming equipment 33 Movable barrel 34 First capture unit 34a axis 34b Suction port 35 First capture unit 35a axis 35b Suction mouth 50 Control Unit 55 Control Unit 60 cabinets 60a Page 1 60b 2nd side 60c 3rd page 60d slope 60e 4th page 60f 5th side 60g 6th side 61 Legs 70 Plate members 71 1st plate part 72 2nd plate part 73 screw holes 74 screws 80 Circuit Board 81 Power supply device, power supply section 82 screws

Claims

1. a winding unit that performs a winding operation to wind the yarn and form a package; a circuit board on which electronic components are mounted, which constitutes a control unit for controlling the winding operation; a power supply unit that supplies power to the circuit board; a plate member on which the power supply unit is disposed; a housing, at least some of whose components are made of resin, that surrounds a space that houses the circuit board, the power supply unit, and the plate member; Equipped with the plate member has a conductive base material layer and a radiation layer formed on an outer surface of the base material layer, The radiation layer has a higher thermal emissivity than the base material layer. Thread winding device.

2. The radiation layer is a plating. The yarn winding device according to claim 1.

3. The radiation layer is electrically conductive. The yarn winding device according to claim 1 or 2.

4. The radiation layer is electrogalvanized. The yarn winding device according to any one of claims 1 to 3.

5. The radiative layer is black chrome plated. The yarn winding device according to any one of claims 1 to 3.

6. The circuit board is connected to the plate member through a ground connection. The yarn winding device according to any one of claims 1 to 5.

7. When the surface with the largest area among the components constituting the housing is viewed from the longitudinal direction, the plate member is a single plate that is long in the vertical direction. The yarn winding device according to any one of claims 1 to 6.

8. A yarn winding device according to any one of claims 1 to 7, Automatic winder.

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