JP2020025023A - Winding device - Google Patents

Abstract

To provide a winding device capable of applying a resin in a device during winding of a wire and manufacturing a high-quality multilayer coil.SOLUTION: A winding device 1 that manufactures a multilayer coil 10 by winding a wire 11 along a winding core 21 includes a bobbin 2 having a core 21 and winding the wire 11 by rotation of the shaft, and a coating roll 91 formed of a cylindrical body having a resin adhered to a circumferential surface thereof, adjacent to the multilayer coil 10 in the bobbin 2 on the circumferential surface, and transferring the resin to the multilayer coil 10 in the bobbin 2 by axial rotation.SELECTED DRAWING: Figure 2

Description

  Embodiments of the present invention relate to a winding device for manufacturing a multilayer coil.

  For example, a multilayer coil used as a motor coil of an electric vehicle or a home appliance and used as a stator coil in a turbine generator or the like is known. The multilayer coil is formed by spirally winding a wire. One or more wires are arranged in each layer. This multilayer coil is resin-molded by transferring resin to each layer, and the production is completed.

  Various proposals have heretofore been made as a winding device for producing a multilayer coil. A winding device generally has a bobbin which is a jig for winding, and winds a wire around a core by rotating the bobbin. When the wire is wound to the core end, the wire is raised to the upper layer, and the upper layer is wound to the other core end while reversing the wire feeding direction. Then, during this winding operation, for example, when one layer of winding is completed, the winding device is temporarily stopped, and the resin is applied manually.

JP 2007-67171 A

  Conventionally, the wire was wound by a winding device, and the application of the resin was performed manually. For this reason, there is a possibility that unevenness in the application of the resin may occur, or that the resin may not sufficiently enter the gap between the wires and bubbles may be mixed. The unevenness of the resin application and the incorporation of air bubbles reduce the coil performance such as the force and current of the multilayer coil.

  An object of the present embodiment is to provide a winding device that can apply a resin with a device during winding of a wire and can manufacture a high-quality multilayer coil in order to solve the above-described problem. I do.

  In order to achieve the above object, a winding device according to the present embodiment is a winding device that manufactures a multilayer coil by winding a wire along a winding core, the winding device having the winding core, It consists of a bobbin that winds the wire by rotation and a cylindrical body with a resin adhered to the circumferential surface, is adjacent to the multilayer coil in the bobbin on the circumferential surface, and is axially rotated to the multilayer coil in the bobbin. And a coating roll for transferring the resin.

FIG. 2 is a top view illustrating the entire configuration of the winding device according to the first embodiment. FIG. 2 is a side view illustrating the overall configuration of the winding device according to the first embodiment. It is a schematic diagram which shows the position change of a doctor roll. It is a schematic diagram which shows adhesion of resin to a coating roll. It is a schematic diagram which shows the position change of the coating roll with respect to a multilayer coil. FIG. 3 is a block diagram illustrating a control configuration of a coating apparatus. It is a graph which shows the change of the peripheral speed of a coating roll. It is a graph which shows the movement amount of a coating roll. It is a side view which shows the example of another coating device of a winding apparatus. It is a side view showing an application device of a coil device concerning a 2nd embodiment. It is a side view showing an application device of a coil device concerning a 3rd embodiment. It is a side view showing an application device of a coil device concerning a 4th embodiment. It is a side view showing an application device of a coil device concerning a 5th embodiment.

(First embodiment)
A winding device according to a first embodiment will be described in detail with reference to the drawings. FIG. 1 is a top view illustrating the overall configuration of the winding device according to the first embodiment, and FIG. 2 is a side view illustrating the overall configuration of the winding device according to the first embodiment. The winding device 1 shown in FIGS. 1 and 2 is a device for manufacturing a multilayer coil 10. In the winding device 1, a single wire 11 is spirally wound around a winding core 21, and is stepped up from a lower layer close to the center of the shaft to an upper layer on the outer surface side to form a multilayer coil.

  Further, the winding device 1 transfers the resin to each layer of the multilayer coil 10 being manufactured while winding the wire 11. The main material of the resin to be transferred is, for example, epoxy resin, unsaturated polyester resin, urethane resin, BMC (Bulk Molding Compound), PPS (Polyphenylene Sulfide), PBT (Polybutylene Terephthalate), or the like.

  The winding device 1 is configured to wind a bobbin 2 having a core 21, a supply system 31 that supplies the wire 11, and a wire 11 supplied from the supply system 31 by moving the wire 11 in parallel along the core 21 of the bobbin 2. The apparatus includes a traverser 51 for determining a position, and a coating device 90 that is disposed close to the bobbin 2 and applies a resin to the wire 11.

  The supply system 31 includes a supply bobbin 41, a tensioner 42, and a feed roller 43. The wire 11 is pulled out from the supply bobbin 41, tensioned by a tensioner 42, wound around a feed roller 43, and enters the traverser 51. The tensioner 42 is a block interposed in a linear path between the supply bobbin 41 and the feed roller 43, and applies tension to the wire 11 by hooking the wire 11 and bending the path.

  The traverser 51 forms a final path for supplying the wire 11 to the bobbin 2. The traverser 51 extends the final path of the wire 11 perpendicular to the winding core 21. That is, the traverser 51 includes a movable roller 61, a movable guide groove 62, and a movable base 63.

  The movable base 63 is a wide plate-like member, and is movable in parallel along the axis of the core 21. The movable roller 61 is installed on a movable base 63, and the wires 11 drawn from the supply system 31 are respectively erected. The movable guide groove 62 guides the wire 11 that has passed through the movable roller 61 to the bobbin 2. The movable guide groove 62 is fixed to the movable base 63, extends orthogonally to the core 21 of the bobbin 2, and reaches right before the core 21. A groove is formed in the movable guide groove 62 along the extending direction, and the wire 11 passes through the groove.

  The traverser 51 includes a traverser driving mechanism 71 that translates the traverser 51 along the winding core 21. The traverser drive mechanism 71 includes a rotation motor 81 and a ball screw 82. The ball screw 82 extends in parallel with the axis of the core 21 and is screwed with the movable base 63 of the traverser 51. The rotation motor 81 rotates the ball screw 82 on its axis. As a result, the traverser 51 moves in parallel along the core 21 according to the driving of the traverser drive mechanism 71.

  The bobbin 2 includes a core 21 and a flange 22. The core 21 is a cylindrical member around which the wire 11 is wound, and has a columnar shape having the same radius from end to end. The flanges 22 are connected to both ends of the core 21. The collar 22 is coaxial with the core 21, has a longer diameter than the core 21, and prevents collapse of the wire 11 wound around the core 21. The rotation shaft 24 supports the bobbin 2 coaxially with the winding core 21. The rotation motor 23 rotates the rotation shaft 24. When the rotation motor 23 is driven, the bobbin 2 rotates in association with the rotation shaft 32 to wind up the wire 11.

  The coating device 90 is, for example, a device using a liquid film transfer method. The coating device 90 includes a resin storage section 93, a coating roll 91, and a doctor roll 92. The resin storage section 93 stores liquid resin. The coating roll 91 transfers the attached resin to the wire 11 wound around the core 21 with the resin in the resin storage unit 93 attached. The doctor roll 92 makes the film pressure of the resin adhered to the coating roll 91 uniform.

  The coating roll 91 is a cylindrical body having a parallel axis to the winding core 21 of the bobbin 2, and is rotated by a rotation motor 94. The coating roll 91 has a cylindrical axis extending in parallel with the axis of the bobbin 2, that is, the core 21, and is arranged so as to be connected to the bobbin 2. The peripheral surface of the coating roll 91 is in contact with or close to the peripheral surface of the multilayer coil 10 wound around the bobbin 2. That is, the length of the coating roll 91 in the axial direction matches the winding core 21, and the coating roll 91 can enter between the flange portions 22. The contact or proximity of the coating roll 91 means that the resin existing on the peripheral surface of the coating roll 91 reaches at least the wire 11 wound around the core 21.

  The doctor roll 92 is a cylindrical body having a parallel axis to the core 21 of the bobbin 2 and the coating roll 91, and is rotated by a rotation motor 95. The doctor roll 92 is connected to the coating roll 91. The axial length of the doctor roll 92 is the same as the coating roll 91. The peripheral surface of the doctor roll 92 is in contact with or close to the peripheral surface of the coating roll 91. The contact or proximity of the doctor roll 92 is such that excess resin can be handled so that the resin adhering to the peripheral surface of the coating roll 91 has a desired film thickness.

  The resin storage section 93 is a gap between the coating roll 91 and the doctor roll 92, the bottom being the closest line between the coating roll 91 and the doctor roll 92, and a side wall defined by a peripheral surface separated from each other, It is a groove having a V-shape. Both ends of the groove are provided with flanges (not shown) on the coating roll 91 and the doctor roll 92, for example, and are closed by the flanges. Liquid resin is dropped from a resin supply line (not shown), and the resin is stored in the resin storage unit 93. A mixer 93a for stirring the resin to maintain a uniform liquid state is provided in the resin storage section 93. The mixer 93a is formed by, for example, extending a plurality of blades radially from a cylindrical shaft, and the cylindrical shaft is rotated by a motor or the like. The plurality of blades are erected spirally along the cylindrical axis, and the mixer 93a may have a screw shape.

  The coating roll 91 and the doctor roll 92 are supported on a common movable base 96. The coating roll 91 is fixed on a movable base 96. On the other hand, the doctor roll 92 is supported by the movable base 96 via the adjusting section 97. The adjusting unit 97 allows the doctor roll 92 to move in the contact direction and the separation direction with respect to the coating roll 91 while maintaining the relationship between the parallel and the height of the doctor roll 92 and the coating roll 91 on the movable base 96, The gap between the doctor roll 92 and the coating roll 91 is adjusted. The adjusting section 97 is, for example, a rail 97a extending on the movable base 96, and a slider 97b that can grip the rail 97a and slide along the rail 97a. The rail 97a extends perpendicular to the axes of the doctor roll 92 and the coating roll 91. The doctor roll 92 is fixed to the slider 97b.

  Further, the coating device 90 includes a roller driving mechanism 98 that moves the coating roll 91 and the doctor roll 92 together via the movable base 96. The roller drive mechanism 98 includes, for example, a ball screw 98a screwed with the movable base 96 and a rotation motor 98b for rotating the ball screw 98a. The ball screw 98a extends orthogonally to the axes of the bobbin 2, the coating roll 91, and the doctor roll 92, and the movable base 96 is slidable along the orthogonal direction. The roller drive mechanism 98 moves the coating roll 91 toward or away from the bobbin 2 while keeping the positional relationship between the coating roll 91 and the doctor roll 92 fixed.

  In such a coating device 90, first, the gap between the coating roll 91 and the doctor roll 92 is adjusted according to the wire diameter of the wire 11 and the outer shape of the multilayer coil 10 formed of the wire 11. That is, as shown in FIG. 3, the position of the doctor roll 92 with respect to the coating roll 91 is changed by the adjustment unit 97. This position change may be performed manually, for example, by installing a motor that applies an external force to the slider 97b, and storing necessary gap information in the computer for the combination of the wire diameter and the coil outer shape. The gap information may be selected by inputting the wire diameter and the outer shape of the coil using a man-machine interface or the like, and the slider 97b may be moved by a drive amount that matches the gap information.

  When the position of the doctor roll 92 with respect to the coating roll 91 is determined, the liquid resin is stored in the resin storage unit 93. During the storage of the resin, the mixer 93a is operated to stir the resin in the resin storage unit 93. Then, in conjunction with the winding of the wire 11 around the bobbin 2, the rotation motor 94 of the coating roll 91 and the rotation motor 95 of the doctor roll 92 are operated, and the coating roll 91 and the doctor roll 92 are rotated about their axes.

  As shown in FIG. 4, when the coating roll 91 rotates axially, the peripheral surface of the coating roll 91 enters the resin storage unit 93 in order from the wide open mouth, the resin in the resin storage unit 93 adheres, and With the box attached, the user goes out of the bottom of the resin storage section 93 toward the bobbin 2. At this time, the thickness of the adhered resin is regulated by the gap between the coating roll 91 and the doctor roll 92. That is, the film thickness is controlled by the adjusting unit 97.

  The doctor roll 92 is rotated in the same direction as the coating roll 91. For example, if the coating roll 91 rotates counterclockwise, the doctor roll 92 will also rotate counterclockwise. As a result, in the portion where the coating roll 91 and the doctor roll 92 face each other, the coating rolls 91 rotate in mutually passing directions, so that a shearing speed is generated, and extra resin is handled by shearing stress and adheres to the coating roll 91. The resin film has a uniform thickness in the gap between the coating roll 91 and the doctor roll 92.

  Here, as shown in FIG. 5, the roller drive mechanism 98 is operated in advance, and a gap between the coating roll 91 and the outer surface of the multilayer coil 10 is formed between the coating roll 91 and the doctor roll 92. Is set to be less than the gap. The gap includes zero gap, that is, contact. In other words, the thickness is set to be equal to or less than the thickness of the resin adhered to the coating roll 91. The movable table 96 may be moved toward or away from the bobbin 2 by driving the rotation motor 98b to rotate the ball screw 98a. Initially, the diameter of the wire 21 wound around the core 21 or the gap between the coating roll 91 and the doctor roll 92 may be reduced to a distance equal to or smaller than the diameter.

  Therefore, when the region where the resin adheres faces the multilayer coil 10 in the bobbin 2, the resin on the surface of the coating roll 91 also contacts the surface of the multilayer coil 10 and is transferred to the multilayer coil 10. The coating roll 91 rotates in the same direction as the bobbin 2 to improve the transfer efficiency to the multilayer coil 10. For example, if the bobbin 2 rotates counterclockwise, the coating roll 91 rotates counterclockwise. Thereby, the coating roll 91 rotates in a direction passing the bobbin 2 at a position facing the bobbin 2, and the coating roll 91 can rub the resin against the multilayer coil 10, thereby improving the transfer efficiency.

  The coating device 90 described above is controlled by the control unit 100 shown in FIG. That is, the winding device 1 includes a control unit 100 that controls the rotation motor 94 of the coating roll 91, the rotation motor 95 of the doctor roll 92, and the roller driving mechanism 98. The control unit 100 shown in FIG. 6 is a so-called computer, and includes a CPU, a RAM, an HDD, a driver circuit, and a tachometer for detecting the torque and the number of revolutions of the bobbin 2. Programs and various data are stored in the external storage device, and these programs and various data are developed in the main storage device and executed by the arithmetic and control unit. The driver circuit outputs a control signal according to an execution result of the arithmetic and control unit. The control signal defines the drive timing according to the output timing, and includes the drive speed information in the content.

  The control unit 100 includes a transfer speed control unit 101, a transfer position control unit 102, and a film thickness control unit 103. The transfer speed control unit 101 always keeps the peripheral speed of the outer surfaces of the coating roll 91 and the multilayer coil 10 constant. The transfer position control unit 102 always keeps the distance between the coating roll 91 and the outer surface of the multilayer coil 10 constant. The film thickness control unit 103 sets a film thickness to be attached to the coating roll 91.

  The transfer speed control unit 101 mainly includes a CPU, a driver circuit for the rotation motor 94 of the coating roll 91, and a tachometer. The transfer speed control unit 101 detects the rotation speed of the bobbin 2. In addition, the transfer speed control unit 101 detects the number of rotations of the bobbin 2, and calculates the outer diameter of the multilayer coil 10 that is increased by the winding of the coil 11A from the number of rotations of the bobbin 2. Then, the transfer speed control unit 101 calculates the peripheral speed of the outer peripheral surface of the multilayer coil 10 from the rotation speed of the bobbin 2 and the outer diameter of the multilayer coil 10 so that the coating roll 91 rotates at the calculated peripheral speed. , And controls the rotation motor 94. Accordingly, the rotating motor 94 changes the circumferential speed of the coating roll 91 to the same speed as the circumferential speed of the multilayer coil 10 as the outer diameter of the multilayer coil 10 increases. To transfer the same amount of resin.

  For example, when the number of rotations of the bobbin 2 is V (rpm) and the number of turns per layer is one, the time required for one rotation is 1 / V. Assuming that the diameter of the wire 11 is d, the peripheral speed of the multilayer coil 10 increases by 2πdV every time 1 / V elapses, and therefore, as shown in FIG. When the radius of 1 / V elapses n times, the radius V of the coating roll 91 may be changed to 2π ｛r + (n + 1) d｝ V. In the case of winding m turns per layer, the circumferential speed of the multilayer coil 10 increases by 2πdV every time m / V elapses. Therefore, in this case, the peripheral speed Vc of the coating roll 91 may be changed to 2π ｛r + (n + 1) d｝ V when the m / V time elapses n times.

  The transfer position control unit 102 mainly includes a CPU, a driver circuit for the roller driving mechanism 98, and a tachometer. The transfer position control unit 102 detects the torque of the bobbin 2 and controls the roller driving mechanism 98 so that the torque is always constant. Thereby, the roller drive mechanism 98 moves the coating roll 91 so as to follow the surface shape of the multilayer coil 10 and keep a constant distance from the surface of the multilayer coil 10. Therefore, the same amount of resin is transferred to each position of each layer of the multilayer coil 10.

  For example, if the torque increases, the contact pressure between the coating roll 91 and the multilayer coil 10 increases, and if the contact pressure increases, the distance between the coating roll 91 and the multilayer coil 10 decreases. . Therefore, when the torque increases, the coating roll 91 is moved in a direction away from the multilayer coil 10 so as to return the torque to a constant value. Then, even if the outer diameter of the multilayer coil 10 increases, the coating roll 91 always keeps a constant distance from the outer surface of the multilayer coil 10.

  At this time, if the number of rotations of the bobbin 2 is V (rpm) and the number of turns per layer is one, the time for one rotation is 1 / V. If the diameter of the wire 11 is d, the time of 1 / V is Since the radius of the multilayer coil 10 increases by d each time, the transfer position control unit 102 controls the multilayer coil 10 and the coating roll 91 when the lowermost layer of the wire 11 is wound as shown in FIG. Is defined as D (D ≧ 0), when the absolute position P of the coating roll 91 is moved in the direction away from the initial position by nd when the time of 1 / V has elapsed n times, the gap becomes the distance D. To maintain. In the case of winding m turns per layer, the radius of the multilayer coil 10 increases by d every time m / V elapses. Therefore, in this case, if the absolute position P of the coating roll 91 is moved in the direction away from the initial position by nd when the m / V time has elapsed n times, the gap maintains the distance D.

  The film thickness control unit 103 mainly includes a CPU, a driver circuit for the rotation motor 95 of the doctor roll 92, and an external storage device, and has a viscosity of the resin stored in the resin storage unit 93 and a viscosity at a reference temperature. Is stored. The film thickness controller 103 calculates the viscosity of the resin by, for example, the Reynolds equation with reference to the resin data 103a, and controls the rotation motor 95 of the doctor roll 92 according to the viscosity of the resin. Thereby, regardless of the viscosity of the resin, the film thickness of the resin adhering to the coating roll 91 becomes constant. For example, the rotational speed of the doctor roll 92 is increased or decreased according to the magnitude of the viscosity, and the shear speed is increased or decreased.

  As described above, the winding device 1 that manufactures the multilayer coil 10 by winding the wire 11 along the winding core 21 has the bobbin 2 that has the winding core 21 and winds the wire 11 by rotating the shaft, A coating roll 91 is formed of a cylindrical body having a resin adhered to a peripheral surface thereof, is adjacent to the multilayer coil 10 in the bobbin 2 on the circumferential surface, and transfers the resin to the multilayer coil 10 in the bobbin 2 by axial rotation. I did it.

  Thereby, the resin can be automatically applied to the multilayer coil 10 without manual operation, so that the quality of the multilayer coil 10 can be made uniform and the yield can be suppressed. That is, the unevenness of the resin coating film is suppressed, the resin hardly enters the gap between the wires 11 and the risk of air bubbles being mixed is reduced, and the performance of the multilayer coil 10 such as power and current can be made uniform.

  In the winding apparatus 1, a method of manufacturing one multilayer coil 10 by winding one wire 11 around a common winding core 21 has been described as an example. Needless to say, two or more wires 11 may be used. The present invention can also be applied to a case where the multilayer coil 10 is manufactured. The winding device 1 for manufacturing the multilayer coil 10 composed of two or more wires 11 may be provided with the paths of the wires 11 composed of the supply system 31 and the traversers 51 in parallel by the number of the wires 11. When the winding position is raised from the lower layer to the upper layer, the arrangement order of the plurality of paths with respect to the extending direction of the winding core 21 may be changed and reversed.

  Further, the winding device 1 is provided with a rotation motor 94 for rotating the coating roll 91 around the shaft. The rotating motor 94 changes the peripheral speed of the coating roll 91 to the same speed as the peripheral speed of the multilayer coil 10 as the outer diameter of the multilayer coil 10 increases. Thereby, even if the number of layers of the multilayer coil 10 is large, the same amount of resin can be transferred to each position of each layer of the multilayer coil 10. Therefore, the multilayer coil 10 of good quality can be manufactured without the shape of the multilayer coil 10 being deformed due to the unevenness of the resin, and the withstand voltage characteristics do not change depending on the location.

  Further, the winding device 1 is provided with a doctor roll 92 which is formed of a cylindrical body, is adjacent to the coating roll 91 on the circumferential surface, and handles excess resin adhered to the coating roll 91 by rotation of the shaft. This also allows the resin to be attached to the coating roll 91 with a uniform film thickness, so that the same amount of resin can be transferred to each position of each layer of the multilayer coil 10. Therefore, the multilayer coil 10 of good quality can be manufactured without the shape of the multilayer coil 10 being deformed due to the unevenness of the resin, and the withstand voltage characteristics do not change depending on the location.

  Further, in the winding device 1, the doctor roll 92 is provided with an adjusting unit 97 for moving the doctor roll 92 toward and away from the coating roll 91 to adjust a gap between the doctor roll 92 and the coating roll 91. Thereby, the amount of resin adhered to the coating roll 91 can be adjusted according to the wire diameter of the wire 11 and the shape of the multilayer coil 10, so that the optimum amount of resin can be adjusted regardless of the wire diameter and shape. It can be supplied to the multilayer coil 10 and a high quality multilayer coil 10 can be manufactured.

  In this winding device 1, the doctor roll 92 is configured to rotate in the same direction as the coating roll 91. As a result, in the place where the doctor roll 92 and the coating roll 91 face each other, they pass each other, the shearing speed is generated efficiently, the excess resin can be handled accurately, and each layer of the multilayer coil 10 The same amount of resin can be transferred to the position. Note that, as long as a shear rate can be generated, the doctor roll 92 does not necessarily need to be rotated in the same direction as the coating roll 91, may be rotated in the opposite direction, or may be stopped.

  Further, a film thickness control unit 103 for controlling the rotation speed of the doctor roll 92 is provided, and the film thickness control unit 103 controls the rotation speed of the doctor roll 92 in consideration of the viscosity and the temperature of the resin. Thus, even if the viscosity of the resin changes, the excess resin can be accurately handled, and the same amount of resin can be transferred to each position of each layer of the multilayer coil 10.

  Further, in the winding device 1, a mixer 93a for stirring the resin is provided in the resin storage section 93. Thereby, during the production of the multilayer coil 10, the resin can be well managed, and the uniform resin can be constantly transferred from the beginning to the end of the winding of the multilayer coil 10, and the quality of the multilayer coil 10 can be improved. Become.

  In addition, the winding device 1 is provided with a roller drive mechanism 98 for moving the coating roll 92 toward and away from the bobbin 2. The roller driving mechanism 98 moves the coating roll 91 so as to follow the surface shape of the multilayer coil 10 and keep a constant distance from the surface of the multilayer coil 10. As a result, even if the outer diameter of the multilayer coil 10 changes, the same amount of resin is transferred to each position on each layer, so that the shape of the multilayer coil 10 is not deformed due to unevenness of the resin. A high-quality multilayer coil 10 can be manufactured without any change in withstand voltage characteristics.

  Further, according to the roller driving mechanism 98, it is possible to cope with the production of the multilayer coil 10 having a cross section of a perfect circle, an ellipse, or various polygons such as a triangle, a square, and a hexagon. That is, for example, as shown in FIG. 9, the core 21 provided in the bobbin 2 of the winding device 1 may have a square cross-sectional shape. According to the winding core 21, the multilayer coil 10 is manufactured to have a substantially rectangular cross-sectional shape with rounded corners.

  Specifically, for example, the coating device 100 feeds back the torque of the bobbin 2 and moves the coating roll 92 so as to make the torque constant. Therefore, regardless of the phase of the multilayer coil 10 facing the coating roll 91, that is, regardless of whether the end of the side of the multilayer coil 10 faces the coating roll 91, the center of the side of the multilayer coil 10 will face the coating roll 91. In either case, even if the corner of the multilayer coil 10 faces the coating roll 91, the coating roll 91 can transfer a resin having a uniform film thickness to the multilayer coil 10 while following the shape of the multilayer coil 10.

  In addition, as a control for following the coating roll 91 with respect to the outer surface of the multilayer coil 10, a method of feeding back the torque of the bobbin 2 has been described as an example. However, the present invention is not limited to this. For example, since the position of the multilayer coil 10 facing the coating roll 91 can be detected by the phase of the bobbin 2, the phase of the bobbin 2 is detected from the rotation speed of the bobbin 2, and the coating roll 91 is connected according to the phase. Sequence control may be performed so as to separate them.

(Second embodiment)
Next, a winding device 1 according to a second embodiment will be described in detail with reference to the drawings. Note that the same components or functions as those of the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

  As shown in FIG. 10, the winding device 1 includes a wire shaping roller 110 that contacts the outer surface of the multilayer coil 10 in the bobbin 2. The wire shaping roller 110 applies a contact pressure toward the core 21 to the wires 11 arranged on the outer surface of the multilayer coil 10. The wire shaping roller 110 includes at least one or more rollers having a shaft parallel to the bobbin 2 and is in contact with the outer surface of the multilayer coil 10. The position of the wire shaping roller 110 is closer to the bobbin rotation direction than the closest line between the coating roll 91 and the bobbin 2.

  According to the wire shaping roller 110, the swelling of the wire 11 is corrected before the resin is transferred, and the wire 11 is correctly aligned, that is, the multilayer coil 10 is shaped. Thus, the wire 11 is in close contact with the core 21 and the upper layer is in close contact with the lower layer, so that the resin can be transferred without forming an air layer in the multilayer coil 10. Therefore, it is possible to suppress the occurrence of voids depending on locations, and it is possible to manufacture a high-quality multilayer coil 10.

  In particular, if the winding core 21 is not a perfect circle but a polygon or an ellipse such as a quadrangle shown in FIG. 10, the wire 11 tends to swell at corners and places where the curvature is large, and the air layer may be mixed. According to the wire shaping roller 110, the lower layer and the upper layer can be brought into close contact with each other, so that the quality is significantly improved.

(Third embodiment)
Next, a winding device 1 according to a third embodiment will be described in detail with reference to the drawings. The same components or functions as those of the first and second embodiments are denoted by the same reference numerals, and detailed description is omitted.

  As shown in FIG. 11, the winding device 1 includes a resin shaping roller 120 that contacts the outer surface of the multilayer coil 10 in the bobbin 2. The resin shaping roller 120 applies a contact pressure to the transferred surface resin. The resin shaping roller 120 includes at least one or more rollers having a shaft parallel to the bobbin 2 and is in contact with the outer surface of the multilayer coil 10. The position of the resin shaping roller 120 is an area after the resin is transferred.

  According to the resin shaping roller 120, the resin can be brought into close contact with the multilayer coil 10, and the bubbles can be crushed and released to the outside. As a result, it is possible to suppress the occurrence of voids depending on locations, and it is possible to manufacture a high-quality multilayer coil 10.

(Fourth embodiment)
Next, a winding device 1 according to a fourth embodiment will be described in detail with reference to the drawings. The same components or functions as those of the first to third embodiments are denoted by the same reference numerals, and detailed description is omitted.

  As shown in FIG. 12, the winding device 1 includes a heater 131 that applies heat to the multilayer coil 10 in the bobbin 2. The heater 131 is installed in the bobbin 2 near the multilayer coil 10. The amount of heat of the heater 131 is set according to a desired curing time. The resin transferred to the multilayer coil 10 is heated by the heater 131 and is efficiently cured. Therefore, it is possible to suppress the shape of the multilayer coil 10 from being distorted due to dripping of the transferred resin, and it is possible to manufacture a compact and high-quality multilayer coil 10. Note that the heating temperature of the heater 131 may be such that the dripping of the resin is suppressed, not for the main curing.

(Fifth embodiment)
Next, a winding device 1 according to a fifth embodiment will be described in detail with reference to the drawings. Note that the same components or functions as those of the first to fourth embodiments are denoted by the same reference numerals, and detailed description is omitted.

  As shown in FIG. 13, the winding device 1 includes a heating furnace 132 that covers the bobbin 2. The heating furnace 132 has an internal space large enough to cover and cover the bobbin 2, and has one end open larger than the outer shape of the bobbin 2. Further, the inside of the heating furnace 132 has a high heat environment due to, for example, installation of a heater. The heating furnace 132 is movable with respect to the bobbin 2.

  After the production of the multilayer coil 10 is completed, the roller drive mechanism 98 moves the coating roll 91 and the doctor roll 92 in a direction away from the bobbin 2 to make room for the heating furnace 132 to move. The heating furnace 132 moves so as to cover the bobbin 2, and places the multilayer coil 10 in the bobbin 2 in a high-temperature environment. Thereby, the resin transferred to the multilayer coil 10 is heated and hardened efficiently. Therefore, it is possible to prevent the shape of the multilayer coil 10 from being distorted due to dripping of the transferred resin, and it is possible to manufacture a compact and high-quality multilayer coil 10.

  In combination with the heater 131, the multi-layer coil 10 is cured so that dripping is prevented by the heater 131 during the manufacture of the multi-layer coil 10, and is completely cured by the heating furnace 132 after the multi-layer coil 10 is manufactured. The manufacturing time may be shortened.

(Other embodiments)
In the present specification, the embodiment according to the present invention has been described, but this embodiment is presented as an example and is not intended to limit the scope of the invention. The embodiment as described above can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. The embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Winding apparatus 10 Multilayer coil 11 Wire 2 Bobbin 21 Core 22 Flange 23 Rotary motor 24 Rotary shaft 31 Supply system 41 Supply bobbin 42 Tensioner 43 Feed roller 51 Traverser 61 Movable roller 62 Movable guide groove 63 Movable base 71 Traverser drive mechanism 81 Rotary motor 82 Ball screw 90 Coating device 91 Coating roll 92 Doctor roll 93 Resin storage unit 93a Mixer 94 Rotary motor 95 Rotary motor 96 Moving table 97 Adjustment unit 97a Rail 97b Slider 98 Roller drive mechanism 98a Ball screw 98b Rotary motor 100 Control unit 101 Transfer Speed control unit 102 Transfer position control unit 103 Film thickness control unit 103a Resin data 110 Wire shaping roller 120 Resin shaping roller 131 Heater 132 Heating furnace

Claims (14)

A winding device for manufacturing a multilayer coil by winding a wire along a core,
A bobbin having the core and winding the wire by axial rotation;
A coating roll made of a cylindrical body having a resin adhered to a circumferential surface, adjacent to the multilayer coil in the bobbin on the circumferential surface, and transferring the resin to the multilayer coil in the bobbin by axial rotation;
Having,
A winding device characterized by the above-mentioned. A first rotation motor that rotates the coating roll about an axis;
The first rotation motor, with the increase in the outer diameter of the multilayer coil, to change the peripheral speed of the coating roll to the same speed as the peripheral speed of the multilayer coil,
The winding device according to claim 1, wherein: A doctor roll made of a cylindrical body, adjacent to the coating roll on the circumferential surface, and handling excess resin adhered to the coating roll by axial rotation,
The winding device according to claim 1 or 2, wherein: A resin storage portion that is defined by the circumferential surface of the coating roll and the circumferential surface of the doctor roll and stores the resin,
The winding device according to claim 3, wherein: In the resin storage unit, comprising a mixer for stirring the resin,
The winding device according to claim 4, wherein: The doctor roll rotates in the same direction as the coating roll, and passes each other at a position facing the coating roll,
The winding device according to any one of claims 3 to 5, wherein The doctor roll is brought into contact with or separated from the coating roll, comprising an adjustment unit that adjusts a gap between the doctor roll and the coating roll,
The winding device according to claim 3, wherein: A control unit for controlling the rotation speed of the doctor roll,
The control unit controls the rotation speed of the doctor roll in consideration of the viscosity and temperature of the resin,
The winding device according to any one of claims 3 to 7, wherein A drive mechanism for moving the coating roll toward and away from the bobbin,
The drive mechanism, following the surface shape of the multilayer coil, to move the coating roll so as to maintain a constant distance from the surface of the multilayer coil,
The winding device according to any one of claims 1 to 8, wherein The core has a perfect circle, ellipse, or polygonal cross-sectional shape,
The winding device according to claim 1, wherein: Before the coating roll and the closest line of the bobbin in the bobbin rotation direction, abutting the multilayer coil in the bobbin, comprising a wire shaping roller to adjust the surface of the multilayer coil,
The winding device according to any one of claims 1 to 10, wherein In a region after the resin is transferred, a resin shaping roller that abuts on the multilayer coil in the bobbin to prepare the resin transferred to the multilayer coil,
The winding device according to any one of claims 1 to 10, wherein Providing a heating furnace that is arranged so as to be able to approach and separate from the bobbin and covers the bobbin and heats the resin.
The winding device according to claim 1, wherein: Providing a heater for heating the resin transferred to the multilayer coil,
The winding device according to claim 1, wherein:

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