Yarn winding device and automatic winder

Abstract

The heat dissipation effect and the electricity removal effect of the yarn winding device are improved. 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 of winding a yarn (11) and forming a package (23). The circuit board (80) constitutes a control unit (55) for controlling the winding unit (2), and is equipped with an electronic component. The power supply device (81) supplies power to the circuit board (80). A power supply device (81) is disposed on the plate member (70). In the housing (60), at least a part of a constituent member is made of resin. The case (60) encloses a space in which the circuit board (80), the power supply device (81), and the board member (70) are housed. 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 heat radiation rate of the radiation layer is higher than the heat radiation rate when the substrate layer is exposed to the outside.

Description

Technical Field

[0001] The invention relates to a yarn winding device and an automatic yarn winder. Background Art

[0002] A yarn winding device for winding yarn to form a package is known. The yarn winding device includes a control device for controlling the winding of the yarn. Electronic components such as the CPU that constitutes the control device, and the circuit board on which the electronic components are mounted, are subject to degradation due to heat and static electricity. Therefore, it is necessary to dissipate heat from the circuit board and other components and eliminate static electricity.

[0003] In the water cooling device disclosed in Japanese Patent No. 5920356, a cooling plate is mounted on each electronic component to cool a system board (substrate) equipped with multiple electronic components. Cooling water, acting as a refrigerant, flows within the cooling plate. The water cooling device cools the electronic components via the cooling water via the cooling plate. The water cooling device also includes a heat absorbing component to increase the amount of heat absorbed by the cooling plate and a heat dissipating component to improve emissivity.

[0004] In yarn winding devices, the space housing the control unit must be sealed to prevent damage to the circuit board and other components caused by fly lint. Consequently, air circulation using fans and other devices is impossible, preventing heat dissipation through heat transfer. Furthermore, the limited space for the control unit makes it difficult to install a water cooling system, as described in Japanese Patent No. 5920356.

[0005] Conventionally, the control unit of a yarn winding device is housed within a metal housing (e.g., die-cast aluminum). Metal housings have high thermal and electrical conductivity, allowing heat dissipation and static removal from circuit boards, power supply components, and other components through the housing.

[0006] However, in recent years, in order to reduce costs and make the yarn winding device lighter, a housing partially made of resin is sometimes used. However, the thermal conductivity and electrical conductivity of a resin housing are low, so the heat dissipation effect and static elimination effect through the housing are low. Summary of the Invention

[0007] An object of the present invention is to improve heat dissipation and static elimination effects in a yarn winding device including a housing partially made of resin.

[0008] Hereinafter, a plurality of methods will be described as means for solving the problem, and these methods can be arbitrarily combined as needed.

[0009] The yarn winding device of the present invention comprises: 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 for controlling the winding unit and is mounted with electronic components. The power supply unit supplies power to the circuit board. The power supply unit is arranged on the plate member. In the housing, at least a portion of the components is made of resin. The housing surrounds a space that accommodates 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 thermal emissivity of the radiation layer is higher than the thermal emissivity when the base material layer is exposed to the outside.

[0010] In this yarn winding device, the radiation layer having a high heat radiation rate is formed on the outer surface of the base material layer of the plate member, thereby enhancing the heat dissipation effect with respect to the circuit board and the power supply unit.

[0011] In the yarn winding device, the radiation layer may be a plated layer, thereby improving the durability of the plate member.

[0012] In the yarn winding device, the radiation layer may be conductive, thereby enhancing the static elimination effect on the power supply unit.

[0013] In the yarn winding device, the radiation layer may be an electrogalvanized layer. The electrogalvanized layer has high conductivity, thereby further enhancing the static elimination effect on the power supply unit. Furthermore, the electrogalvanized layer has high thermal emissivity, thereby further enhancing the heat dissipation effect on the circuit board and the power supply unit.

[0014] In the yarn winding device, the radiation layer may be a black chrome plating layer. Black chrome plating has high conductivity, thereby further enhancing the static elimination effect on the power supply unit. Furthermore, black chrome plating has high thermal emissivity, thereby further enhancing the heat dissipation effect on the circuit board and the power supply unit.

[0015] In the yarn winding device, the circuit board may be grounded to the plate member.

[0016] In the yarn winding device, the plate member may be a single plate that is long in the vertical direction when the surface of the largest area among the components constituting the housing is viewed in the longitudinal direction.

[0017] The automatic winder of the present invention includes a plurality of the yarn winding devices of the present invention.

[0018] According to the yarn winding device or the automatic winder of the present invention, the heat dissipation effect and the static elimination effect on the circuit board, the power supply component, etc. are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a diagram showing the structure of an automatic winder.

[0020] Figure 2 It is a diagram showing the structure of a yarn winding device.

[0021] Figure 3 This is a diagram showing the interior of the control unit as viewed from the right side of the yarn winding device.

[0022] Figure 4 This is a perspective view of the outer appearance of the housing of the yarn winding device as viewed from the upper right side.

[0023] Figure 5 This is the front view of the plate component.

[0024] Description of Reference Numerals

[0025] 1…Automatic winder; 2…Winding unit; 10…Yarn winding device; 11…Yarn; 12…Machine control device; 12a…Display; 12b…Input interface; 13…Doffing device; 20…Yarn feeding bobbin; 21…Winding drum; 21m…First motor; 22…Winding tube; 23…Package; 24…Cradle; 25…Rotating shaft; 26…Yarn unwinding auxiliary device; 27…Tension applying device; 27a…Comb teeth; 27b…Comb teeth; 28…Yarn splicing device; 29…Yarn clearer; 29a…Yarn clearer head; 29b…Cutter; 30…Waxing device; 31…Cleaning tube; 32…Package forming device ; 33… movable cylinder; 34… first capturing portion; 34a… shaft; 34b… suction port; 35… second capturing portion; 35a… shaft; 35b… suction nozzle; 50… control unit; 55… control unit; 60… housing; 60a… first surface; 60b… second surface; 60c… third surface; 60d… inclined portion; 60e… fourth surface; 60f… fifth surface; 60g… sixth surface; 61… foot; 70… plate component; 71… first plate portion; 72… second plate portion; 73… screw hole; 74… screw; 80… circuit substrate; 81… power supply device, power supply portion; 82… screw. DETAILED DESCRIPTION

[0026] 1. First Implementation

[0027] (1) Automatic winding machine

[0028] Figure 1 1 is a diagram showing the structure of the automatic winder 1. Figure 1 、 Figure 3 as well as Figure 4 In FIG. 1 , arrows indicating front, rear, up, down, left, and right indicate directions when the automatic winder 1 is viewed from the front side.

[0029] The automatic winder 1 includes a plurality of yarn winding devices 10 arranged in parallel. 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 structure and operation of the yarn winding device 10 will be described later.

[0030] 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. The operator of the automatic winder 1 can 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 devices 10. The operator can perform settings for the yarn winding devices 10 by appropriately operating the input interface 12b.

[0031] The display 12a is a display device such as a liquid crystal display. The input interface 12b is an input device such as an input key or a touch panel. The display 12a and the input interface 12b as a touch panel may be integrated.

[0032] The automatic winder 1 includes a doffing device 13. When the package 23 in each yarn winding device 10 becomes fully wound (a state in which a predetermined amount of yarn is wound), the doffing device 13 moves to the position of the yarn winding device 10, removes the fully wound package, and sets an empty winding bobbin.

[0033] (2) Yarn winding device

[0034] Figure 2 This figure shows the structure of a yarn winding device 10. The yarn winding device 10 includes a winding unit 2 and a control unit 50 for controlling the winding unit 2. The winding unit 2 performs a winding operation to wind the yarn 11 unwound from the yarn supply bobbin 20 onto the surface of the winding tube 22 to form a package 23. The yarn winding device 10 according to this embodiment is a drum-type yarn winding device 10, but the yarn winding device 10 may also be a traverse arm-type winding device or a traverse belt-type winding device. Furthermore, the yarn winding device 10 according to this embodiment is mounted on the automatic winder 1, but the yarn winding device 10 may also be mounted on, for example, an air spinning machine or an open-end spinning machine.

[0035] (2-1) Winding unit

[0036] like Figure 2 As shown, as the main structure, the winding unit 2 includes, in sequence from the yarn feeding tube 20 toward the winding tube 22: a yarn unwinding auxiliary device 26, a tension applying device 27, a yarn joining device 28, a yarn clearer 29 (yarn quality measuring device), a waxing device 30, a cleaning tube 31 and a package forming device 32.

[0037] The yarn unwinding assist device 26 limits the expansion (balloon) of the yarn 11 during unwinding, thereby stabilizing the unwinding tension. The yarn unwinding assist device 26 includes a movable cylinder 33 that covers the yarn supply bobbin 20 from above. As the yarn 11 is unwound, the movable cylinder 33 descends, thereby limiting the expansion (balloon) of the yarn 11 during unwinding and stabilizing the unwinding tension.

[0038] The tension-applying device 27 applies a predetermined tension to the moving yarn 11. For example, a gate-type device can be used, in which movable comb teeth 27b are positioned relative to fixed comb teeth 27a. The movable comb teeth 27b are configured to be engaged or disengaged. By flexing the engaged comb teeth while the yarn 11 passes through them, a constant tension is applied to the wound yarn 11, improving the quality of the package 23. Furthermore, in addition to the gate-type device described above, a disc-type device can also be used as the tension-applying device 27.

[0039] The yarn splicing device 28 splices the yarn 11 on the yarn supplying bobbin 20 side and the yarn 11 on the package 23 side when the yarn 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 a splicing device that twists the yarn ends together using a swirling air flow generated by compressed air, for example.

[0040] The yarn clearer 29 monitors the state of the yarn 11 traveling along the yarn travel path and detects the presence of yarn defects based on the monitored information. The yarn clearer 29 includes a yarn clearer head 29a and an analyzer (not shown). The yarn clearer head 29a is equipped with a sensor for detecting the thickness of the yarn 11. The analyzer processes the yarn thickness signal from the sensor. The yarn clearer 29 is configured to monitor the yarn thickness signal from the sensor and detect yarn defects such as thick places. A cutter 29b is provided near the yarn clearer head 29a. The cutter 29b is used to immediately cut the yarn 11 when the yarn clearer 29 detects a yarn defect.

[0041] A first catching portion 34 is provided upstream of the yarn splicing device 28, and a second catching portion 35 is provided downstream of the yarn splicing device 28 in the direction of movement of the yarn 11 during yarn winding. When the yarn 11 is cut, the first catching portion 34 catches the yarn 11 on the yarn supply bobbin 20 and guides it to the yarn splicing device 28. When the yarn 11 is cut, the second catching portion 35 catches the yarn 11 on the package 23 and guides it to the yarn splicing device 28. The first catching portion 34 and the second catching portion 35 are configured to rotate about axes 34a and 35a, respectively. A suction port 34b is formed at the front end of the first catching portion 34, and a suction nozzle 35b is provided at the front end of the second catching portion 35. A negative pressure source (not shown) is connected to each of the first catching portion 34 and the second catching portion 35, respectively, so that the suction port 34b and the suction nozzle 35b generate suction flow to suck and capture the yarn end.

[0042] The waxing device 30 is a device for applying appropriate wax to the moving yarn 11 .

[0043] The cleaning tube 31 is a device that suctions and removes foreign matter attached to the running yarn 11. The base end of the cleaning tube 31 is connected to a blower via a gate device (not shown), and a suction port is formed at the front end of the cleaning tube 31. The suction port of the cleaning tube 31 is located close to the yarn 11 running between the waxing device 30 and the winding drum 21.

[0044] The package forming device 32 includes a cradle 24 , a winding tube 22 , and a winding drum 21 as main components.

[0045] The cradle 24 is configured to be rotatable about a rotation shaft 25. The cradle 24 sandwiches the package 23 from both ends in the longitudinal direction and supports the package 23 so as to be rotatable about a predetermined axis.

[0046] The winding drum 21 is a cylindrical member that is driven to rotate about its axis by a first motor 21m. The winding drum 21 is driven to rotate while the outer periphery of the package 23 is in contact with the winding drum 21, thereby imparting a driving force to the package 23, which is then driven to rotate as the winding drum 21 rotates.

[0047] Furthermore, a spiral traverse groove is formed on the side surface of the winding drum 21. As the winding drum 21 is rotated, the package 23 is driven to rotate, and the yarn 11 unwound from the yarn supplying bobbin 20 traverses along the surface of the package 23 at a constant width through the traverse groove. Thus, the yarn 11 unwound from the yarn supplying bobbin 20 is wound along the surface of the package 23 while traversing. As a result, a package 23 having a constant winding width is formed.

[0048] (2-2) Control Unit

[0049] like Figure 1As shown, the control unit 50 is provided on the right side surface of the winding unit 2 to be controlled. Figure 1 The installation position of the control unit 50 in FIG. 1 is an example, and the installation position is not limited as long as it is near the winding unit 2 to be controlled.

[0050] Figure 3 1 is a diagram showing the interior of the housing 60 constituting the control unit 50 as viewed from the right side surface of the yarn winding device 10. Figure 3 As shown, the control unit 50 mainly includes a 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. Furthermore, the control unit 50 includes a leg 61 that abuts against the lower surface of the housing 60. The housing 60 is attached to the upper surface of the leg 61, thereby supporting the housing 60.

[0051] (2-2-1) Housing

[0052] like Figure 3 As shown, the housing 60 surrounds a space housing 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 therein.

[0053] Figure 4 This is a perspective view showing the appearance of the housing 60. When viewed from the front of the automatic winder 1, the housing 60 primarily comprises a first surface 60a (left side), a second surface 60b (rear side), a third surface 60c (front side), a fourth surface 60e (upper side), a fifth surface 60f (lower side), and a sixth surface 60g (right side). The third surface 60c may also have an inclined portion 60d. The first surface 60a and the sixth surface 60g are the largest surfaces of the components of 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 reduces costs and makes the yarn winding device 10 lightweight.

[0054] In the present embodiment, the components of the sixth surface 60g are made of metal. The sixth surface 60g is composed of metals such as iron, stainless steel (SUS) or aluminum. Thus, via the sixth surface 60g, the heat dissipation effect and static electricity removal effect inside the housing 60 can be improved. In addition, it is preferred that the sixth surface 60g is coated on both the inner surface and the outer surface of the housing 60. By coating, the thermal radiation rate becomes higher, thereby improving the heat dissipation effect of the heat inside the housing 60 to the outside.

[0055] (2-2-2) Plate components

[0056] like Figure 3 As shown, the plate member 70 is arranged substantially parallel to the first surface 60a on the right side of the first surface 60a (the rear side when the automatic winder 1 is viewed from the front). The plate member 70 is attached to the first surface 60a by screws, for example. Figure 5 This figure shows the plate member 70 viewed from the front (thickness direction). When the first surface 60a is viewed from the longitudinal direction, the plate member 70 is composed of a single plate (first plate portion 71) that is long in the vertical direction. A housing 60 partially made of resin is less strong than a housing made entirely of metal. The above-described structure of the first plate portion 71 improves the strength of the housing 60 and prevents deformation.

[0057] The plate member 70 may further include a second plate portion 72. In this embodiment, the second plate portion 72 extends from the longitudinal side surface of the first plate portion 71 in the width direction of the housing 60. The second plate portion 72 is attached to the first plate portion 71, for example, using screws 74. Furthermore, the second plate portion 72 includes screw holes 73 for grounding. Alternatively, the first plate portion 71 may include screw holes 73 for grounding.

[0058] Hereinafter, the first plate portion 71 and the second plate portion 72 are collectively referred to as the plate member 70 .

[0059] The plate member 70 has a metal base layer. The base layer is made of, for example, iron, stainless steel (SUS), or aluminum. The material of the base layer is not limited to the above materials, and any material having conductivity can be used.

[0060] Furthermore, a radiation layer is formed on the outer surface of the base material layer in the plate member 70. Specifically, the radiation layer is formed on both the surface of the base material layer on which the power supply device 81 is mounted and the back surface opposite the first surface 60a. 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 layer. In this embodiment, the radiation layer is, for example, an electroplated zinc layer. Electroplated zinc layers undergo an electroplating process while current is passed through them, resulting in high conductivity. Furthermore, the radiation layer has a higher thermal emissivity than the polished surface of the metal base material layer. The radiation layer is not limited to a conductive zinc layer; it can also be a black chrome plating layer. Black chrome plating also has high conductivity, similar to the electroplated zinc layer. Furthermore, by painting both surfaces of the plate member 70 black, the thermal emissivity can be further increased. This structure allows heat from the plate member 70 to be dissipated to the housing 60 through radiation.

[0061] (2-2-3) Control Unit

[0062] The control unit 55 is comprised of one or more circuit boards 80. The control unit 55 is connected to the machine control device 12 to enable the exchange of control signals and information. Furthermore, the control unit 55 is communicatively connected to sensors for detecting the position and state of the yarn 11, sensors for detecting the states of the various devices in the winding unit 2, and switches. Based on control signals from the machine control device 12, the control unit 55 controls the operation of the various devices comprising the winding unit 2. Thus, the control unit 55 controls the winding operation of the winding unit 2.

[0063] The control unit 55 is a computer system that includes sensors (e.g., a CPU), storage devices (e.g., ROM, RAM, HDD, SSD, etc.), and various interfaces (e.g., A / D converter, D / A converter, communication interface, etc.). The control unit 55 executes programs stored in the storage unit (corresponding to part or all of the storage area of the storage device) to perform various control operations.

[0064] A circuit board 80, which includes electronic components such as sensors and constitutes the control unit 55, is mounted on the first surface 60a of the housing 60, for example, using screws. Furthermore, screws 82 are engaged with grounding screw holes 73 of the plate member 70, thereby attaching the circuit board 80 to the plate member 70. The circuit board 80 is grounded to the plate member 70 via the screws 82. This eliminates static electricity on the circuit board 80.

[0065] The circuit board 80, which carries a high current of 200V, can also be mounted on 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. This surface contact with the conductive second plate portion 72 ensures a stable ground connection at all times. Furthermore, heat generated by the electronic components mounted on the circuit board 80 and within the circuit board 80 can be dissipated to the plate member 70 via the aluminum base of the circuit board 80.

[0066] A power supply device (power supply unit) 81 such as a DC / DC converter that supplies power to the circuit substrate 80, and a power supply device 81 that supplies power to the first motor 21m that drives the winding drum 21 in rotation are mounted on the first plate portion 71 of the plate member 70, for example, by screws. At this time, the mounted surface of the plate member 70 and the mounting surface of the power supply device 81 are mounted in a state of surface contact. High power flows through the power supply device 81, so stable grounding is required. Therefore, the power supply device 81 has a grounding wiring that is connected to a static elimination device. The plate member 70 is mounted in a state of surface contact with the power supply device 81, so that stable grounding can always be achieved. Thus, each of the above-mentioned power supply devices 81 can eliminate the electrostatic force carried by the power supply device 81 via the plate member 70. In addition, the heat generated in the power supply device 81 can be dissipated to the plate member 70.

[0067] 2. Features of the implementation method

[0068] The first embodiment described above has the following structures and functions.

[0069] (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 of winding the yarn 11 to form a package 23. The circuit board 80 constitutes the control unit 55 for controlling the winding unit 2 and is equipped with electronic components. The power supply device 81 supplies power to the circuit board 80. The power supply device 81 is arranged on the plate member 70. In the housing 60, at least a part of the components is made of resin. The housing 60 surrounds the space that accommodates 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 thermal emissivity of the radiation layer is higher than the thermal emissivity when the base material layer is exposed to the outside.

[0070] With this structure, 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 of the plate member 70 is dissipated by radiation to the housing 60, and then dissipated to the outside of the housing 60. In this yarn winding device 10, a radiation layer with a high thermal emissivity is formed on the outer surface of the base material layer of the plate member 70, thereby improving the heat dissipation effect on the circuit board 80 and the power supply device 81.

[0071] (2) In the yarn winding device 10, the radiation layer may be a plated layer. By performing electroplating treatment on the outer surface of the base material layer, the durability of the plate member 70 is improved.

[0072] (3) In the yarn winding device 10, the radiation layer may be conductive. The outer surface of the base material layer is conductive, thereby enhancing the static elimination effect on the power supply device 81.

[0073] (4) In the yarn winding device 10, the radiation layer may be an electro-galvanized layer. The electro-galvanized layer has high conductivity, thereby further improving the static elimination effect on the power supply device 81. Furthermore, the electro-galvanized layer has high thermal emissivity, thereby further improving the heat dissipation effect on the circuit board 80 and the power supply device 81.

[0074] (5) In the yarn winding device 10, the radiation layer may be a black chrome plating layer. The black chrome plating layer has high conductivity, thereby further improving the static elimination effect on the power supply device 81. In addition, the black chrome plating layer has high thermal radiation rate, thereby further improving the heat dissipation effect on the circuit board 80 and the power supply device 81.

[0075] (6) In the yarn winding device 10, the circuit board 80 may be grounded to the plate member 70. This can provide a static elimination effect on the circuit board 80.

[0076] (7) In the yarn winding device 10, the plate member 70 may be a single plate that is long in the vertical direction when the first surface 60a, which is the largest surface area among the components constituting the housing 60, is viewed from the longitudinal direction.

[0077] (8) The automatic winder 1 includes a plurality of the yarn winding devices 10 described above.

[0078] 3. Modifications

[0079] (1) In this embodiment, the plate member 70 has a radiation layer as an electro-galvanized layer on both the surface of the base material layer on which the power supply device 81 is mounted and the back surface on the side opposite the first surface 60a. However, the plate member 70 may also have a radiation layer with electro-galvanized surface only. The surface needs to be grounded to the power supply device 81, so it is preferably conductive. The back surface may also be coated with a high emissivity. This can improve the heat dissipation and static elimination effects.

[0080] (2) In this embodiment, when the first surface 60a is viewed from the longitudinal direction, the first plate portion 71 is composed of a single plate (first plate portion 71) that is long in the vertical direction. However, the first plate portion 71 may be composed of one or more members.

[0081] 4. Other Implementation Methods

[0082] While one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications can be made without departing from the spirit of the invention. In particular, the multiple embodiments and modifications described in this specification can be arbitrarily combined as needed.

[0083] The yarn winding device of the present invention can be used in an automatic winder, an air spinning machine, and an open-end spinning machine that utilize a plurality of yarn winding devices in parallel. In addition, the yarn winding device of the present invention can be used in a fiber machine that manufactures wide fibers.

Claims

1. A yarn winding device comprising: A winding unit that performs the winding action of winding the yarn and forming a package; a circuit board constituting a control unit for controlling the winding operation and having electronic components mounted thereon; a power supply unit for supplying power to the circuit substrate; a plate member provided with the power supply unit; as well as The housing, at least part of which is made of resin, surrounds the space for accommodating the circuit board, the power supply unit, and the plate member. The plate member includes a conductive base material layer and a radiation layer formed on an outer surface of the base material layer. The thermal emissivity of the radiation layer is higher than that when the base material layer is exposed to the outside.

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

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

4. The yarn winding device according to any one of claims 1 to 3, wherein: The radiation layer is an electroplated zinc layer.

5. The yarn winding device according to any one of claims 1 to 3, wherein: The radiation layer is a black chrome plating layer.

6. The yarn winding device according to any one of claims 1 to 5, wherein: The circuit substrate and the plate member are grounded.

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

8. An automatic winder comprising a plurality of the yarn winding devices according to any one of claims 1 to 7.

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