Winding Device

Abstract

To provide a winding device capable of suppressing the product quality deterioration caused by winding scratches even when the cross-sectional shape of the winding wire is changed midway and then wrapped around the wrapping target.SOLUTION: The disclosed winding device 20 supplies a winding wire from a winding reel 21 to a split core 7 and winds the same around the teeth of the split core 7. The disclosed winding device includes: a flat wire forming machine 22 that is located downstream of the winding reel 21, which changes the cross-sectional shape of a round wire, which is fed out from the winding reel 21, and which has a substantially circular cross-section, and forms a flat wire with a roughly rectangular cross-section; and a scratch detection unit 24 that is located downstream of the flat wire forming machine 22 to detect scratches on the flat wire.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a winding device. [Background technology]

[0002] Generally, brushless motors and the like, which are composed of a rotor with a magnet and a stator with windings, can improve their performance by increasing the density (space factor) of the windings wound around the teeth of the stator. To increase the space factor, a winding made of so-called rectangular wire with a roughly rectangular cross section may be used. Because of its shape, rectangular wire allows for smaller gaps between the windings in the stator compared to round wire, further improving the space factor.

[0003] For example, Patent Document 1 discloses a technique for forming a rectangular wire from a round wire using a rectangular wire forming device and winding the formed rectangular wire around the teeth of a split core. In this rectangular wire forming device, a round wire with a circular cross section from a winding reel is crushed from above and below by a first roller, then crushed from the side by a second roller to form a temporary rectangular wire with a substantially square cross section, and finally crushed again from above and below by a third roller to form the rectangular wire. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-166102 Summary of the Invention [Problem to be solved by the invention]

[0005] When the cross-sectional shape of the winding is changed before being supplied to the teeth of the split core, as in the technology described in Patent Document 1, there is a possibility that the winding may be damaged when the cross-sectional shape of the winding is changed. Therefore, when the cross-sectional shape of the winding is changed and then the winding is wound in multiple layers around the teeth of the split core to form a coil, there is a possibility that multiple locations where the winding has been damaged may be contained in one coil, which may result in a decrease in product quality.

[0006] Therefore, the present disclosure aims to provide a winding device that can suppress deterioration in product quality due to scratches on the winding, even when the cross-sectional shape of the winding is deformed midway before being wound around the winding target. [Means for solving the problem]

[0007] In order to solve the above problems, a first aspect of the present invention is a winding device that supplies a winding from a wire supply source to a winding target and winds it around the winding target, and includes a winding deformation unit that is located downstream of the wire supply source and changes the cross-sectional shape of the winding, and a flaw detection unit that is located downstream of the winding deformation unit and detects flaws in the winding.

[0008] A second aspect of the present invention is the winding device of the first aspect, further comprising a control unit that executes a predetermined process based on the detection of a flaw by the flaw detection unit.

[0009] A third aspect of the present invention is a winding device according to the second aspect, wherein the control unit executes the predetermined process when the number of flaws contained in the winding per unit amount wound around one of the winding objects is equal to or greater than a predetermined threshold value.

[0010] A fourth aspect of the present invention is the winding device of the third aspect, further comprising a withdrawal amount detection unit that detects the amount of the winding drawn from the wire supply source, and the control unit detects the number of flaws in the winding per unit amount based on the current withdrawal amount detected by the withdrawal amount detection unit and the withdrawal amount when the flaw detection unit detected a flaw.

[0011] A fifth aspect of the present invention is the winding device according to the second aspect, wherein the control unit executes the predetermined process when the flaw detection unit detects a flaw in the winding.

[0012] A sixth aspect of the present invention is a winding device according to any one of the second to fifth aspects, further comprising an alarm unit that is controlled by the control unit and is capable of reporting information about flaws in the winding, and the predetermined processing executed by the control unit includes reporting by the alarm unit. [Effects of the Invention]

[0013] According to the present disclosure, even when the cross-sectional shape of the winding is deformed midway before being wound around a winding target, deterioration in product quality due to scratches on the winding can be suppressed. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of a motor having a split core. [Figure 2] FIG. 2 is a side view of a split core and a coil. [Figure 3] FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. [Figure 4] 1 is a schematic diagram of a winding device according to an embodiment of the present invention; [Figure 5] FIG. 2 is a perspective view of a rectangular wire forming machine. [Figure 6] FIG. 2 is an explanatory diagram showing the forming process of a rectangular wire. [Figure 7] FIG. 10 is an explanatory diagram for detecting flaws contained in a winding per unit amount. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of the present invention will be described below with reference to the drawings. In each drawing, W indicates the width direction of the rectangular wire, T indicates the thickness direction of the rectangular wire, A indicates the axial direction of the coil, and R indicates the radial direction of the coil.

[0016] Fig. 1 is a perspective view of a motor having a split core, Fig. 2 is a side view of the split core and coil, and Fig. 3 is a cross-sectional view taken along the line III-III in Fig. 2.

[0017] 1, a winding device according to the present disclosure is applied, for example, to a winding device used when manufacturing a stator 2 of a brushless motor 1 (rotating electric machine). The brushless motor 1 (hereinafter referred to as "motor 1") has a stator 2 press-fitted into a housing (not shown), and a rotor 3 arranged radially inside the stator 2 and rotatable relative to the stator 2.

[0018] The stator 2 includes a stator core 4, an insulating insulator 5 attached to the stator core 4, and a coil 6. The stator core 4 of this embodiment is a split-core type stator core 4 that is split in the circumferential direction of the motor, and is formed by connecting a plurality of split cores 7 in an annular shape in the circumferential direction of the motor.

[0019] As shown in FIGS. 2 and 3 , the split cores (the objects to be wound) 7 of the stator core 4 include yoke portions 8 having a generally arcuate cross section and extending circumferentially from the radially outer side of the motor, teeth 9 extending radially inward from the yoke portions 8, and flange portions 10 extending from the radially inner ends of the teeth 9 to both sides in the circumferential direction of the motor. In this embodiment, the split cores 7 are formed by, for example, stacking multiple metal plates in the axial direction of the motor and extending linearly along the axial direction of the motor. When the stator core 4 is formed by connecting multiple split cores 7 in an annular shape in the circumferential direction of the motor, the yoke portions 8 form a generally cylindrical back yoke that forms a ring-shaped magnetic path. The coils 6 of this embodiment are formed by winding rectangular wire (winding) 11 around the teeth 9. The split cores 7 may have a skew angle that is inclined relative to the longitudinal direction of the split cores 7 (the axial direction of the motor). In addition, in this embodiment, the teeth 9 of the split core 7 of the stator core 4 are exemplified as the winding target, but the winding target is arbitrary, and the present invention is also applicable to an armature core, etc. The present invention is also applicable to the case where a coil is wound around a non-magnetic body, and the function and use of the coil are arbitrary.

[0020] Connecting portions 8a, 8b are formed at both ends of the yoke portion 8 in the motor circumferential direction to connect adjacent split cores 7. One connecting portion 8a extends in the motor axial direction and protrudes outward in the motor circumferential direction. The other connecting portion 8b is formed as a groove extending in the motor axial direction and recessed inward in the motor circumferential direction, and is engageable with the one connecting portion 8a. The connecting portions 8a, 8b at both ends of the yoke portion 8 in the motor circumferential direction can be engaged with the connecting portions 8b, 8a of the yoke portion 8 of other split cores 7 adjacent on both sides in the motor circumferential direction to connect multiple split cores 7 to form the stator core 4. The teeth 9 extend in the motor axial direction from a central portion of the inner circumferential surface of the yoke portion 8 in the motor circumferential direction (approximately the center in this embodiment) and protrude inward in the motor radial direction (toward the rotation center of the motor 1). The flange portions 10 extend in the motor axial direction while protruding from inner ends of the teeth portions 9 in the motor radial direction to both sides in the motor circumferential direction.

[0021] A pair of slots 12 for winding wire (rectangular wire 11) that forms coil 6 are defined on both sides of tooth portion 9 in the circumferential direction of the motor by yoke portion 8, tooth portion 9, and flange portion 10. In other words, slot 12 is located inside an imaginary line (two-dot chain line in FIG. 3) that connects the end of yoke portion 8 in the circumferential direction of the motor and the end of flange portion 10 in the circumferential direction of the motor.

[0022] The insulators 5 are attached to the split cores 7 so as to cover the peripheries of the teeth 9. The insulators 5 cover the portions of the split cores 7 facing the slots 12, and also cover both ends of the teeth 9 in the motor axial direction.

[0023] FIG. 4 is a schematic diagram of a winding device 20 according to one embodiment of the present invention.

[0024] 4, the winding device 20 according to this embodiment includes a winding reel (wire supply source) 21, a rectangular wire forming machine (winding deformation unit) 22, a pull-out amount detection unit 23, a flaw detection unit 24, a tensioning device 25, a nozzle 26, a winding machine 27, a notification unit 28, and a controller (control unit) 29. The winding device 20 supplies the wire from the winding reel 21 to a split core 7 (in this embodiment, the split core 7 supported by the winding machine 27) to be wound, and winds the wire around teeth 9 (see FIG. 3) of the split core 7. The devices are provided in this order from the upstream side in the direction of movement of the winding: the winding reel 21, the rectangular wire forming machine 22, the tensioning device 25, the nozzle 26, and the winding machine 27.

[0025] The winding reel 21 is a supply source of wire material for the winding (wire material supply source), and is wound in advance with a round element wire (winding wire) 13 as the winding. The surface of the conductor of the round element wire 13 is covered with an insulating film. Note that the wire material supply source is not limited to the winding reel 21 as long as it is a supply source of wire material for the winding.

[0026] Fig. 5 is a perspective view of the rectangular wire forming machine 22. Fig. 6 is an explanatory view showing the forming process of the rectangular wire 11. Fig. 6 shows the round wire 13 to be wound and the rectangular wire 11 as viewed from the direction of flow.

[0027] 4 to 6, the rectangular wire forming machine 22 is disposed downstream of the winding reel 21 and upstream of the nozzle 26 (i.e., upstream of the winding machine 27), and changes the cross-sectional shape of the winding. The rectangular wire forming machine 22 of this embodiment changes the cross-sectional shape of the round element wire 13, which has a substantially circular cross-section and is fed from the winding reel 21 side (feed in the direction of the outline arrow in FIGS. 4 and 5), to form the rectangular wire 11, which has a substantially rectangular cross-section.

[0028] The rectangular wire forming machine 22 of this embodiment has a pair of first rollers 30, 30 on the upstream side and a pair of second rollers 31, 31 on the downstream side. The first rollers 30, 30 apply a compressive force in the width direction W (the vertical direction in FIG. 5) to the round wire 13 fed from the winding reel 21 in the direction of the outline arrow. The second rollers 31, 31 are disposed downstream of the first rollers 30, 30 and apply a compressive force in the thickness direction T (the horizontal direction in FIG. 5) to the wire wound around the first rollers 30, 30. The width direction W refers to the direction along the axial direction A of the tooth portion 9 (the axial direction of the coil 6) (the direction in which the rectangular wires 11 in the same layer are adjacent) when the rectangular wire 11 is wound around the tooth portion 9 of the split core 7 (see FIG. 3). Furthermore, the thickness direction T is a direction intersecting the width direction W, and means the direction (stacking direction of the flat wire 11) along the radial direction R of the tooth portion 9 (radial direction of the coil 6) when the flat wire 11 is wound around the tooth portion 9 of the split core 7.

[0029] As shown in FIG. 6, the rectangular wire forming machine 22 forms a rectangular wire 11 having a substantially rectangular cross section, with a length X in the thickness direction T being shorter than a length Y in the width direction W. The round wire 13 from the winding reel 21 is first compressed from both sides in the width direction W by the first rollers 30, 30, and then compressed from both sides in the thickness direction T by the second rollers 31, 31. The distance between the first rollers 30, 30 and the distance between the second rollers 31, 31 are variably controlled by a drive mechanism (not shown). The distance between the first rollers 30, 30 and the distance between the second rollers 31, 31 determine the cross-sectional shape of the rectangular wire 11. When the distance between the first rollers 30, 30 and the distance between the second rollers 31, 31 are equal to or greater than the diameter of the round wire 13, the round wire 13 is not deformed in the rectangular wire forming machine 22 and maintains its cross-sectional shape (circular cross section). In this case, the round wire 13 is supplied to the winding machine 27 via the rectangular wire forming machine 22, the flaw detector 24, the tension device 25, and the nozzle 26. The order in which the round wire 13 is compressed in the width direction W and the thickness direction T does not matter. In addition to the first rollers 30, 30 and the second rollers 31, 31, other rollers may be added to compress the winding wire multiple times in the same direction (horizontal or vertical). Furthermore, the winding wire may be compressed in only one direction once or multiple times.

[0030] As shown in FIG. 4 , the pull-out amount detection unit 23 detects the pull-out amount L of the winding wire pulled out from the winding reel 21 (hereinafter simply referred to as the "pull-out amount L of the winding wire"). The pull-out amount detection unit 23 in this embodiment is an encoder located downstream of the rectangular wire forming machine 22. The pull-out amount detection unit 23 is connected to the controller 29. This allows the controller 29 to obtain the pull-out amount L of the winding wire from the pull-out amount detection unit 23. The pull-out amount detection unit 23 in this embodiment detects the total amount (total length) of the winding wire pulled out since the winding device 20 started operating as the pull-out amount L of the winding wire. The pull-out amount detection unit 23 in this embodiment has a roller 23a that is located in the winding supply path and rotates as the winding wire moves, and detects the pull-out amount L of the winding wire based on the amount (number of rotations) of the roller 23a. The configuration of the pull-out amount detection unit 23 is not limited to the above, and any configuration that can detect the pull-out amount of the winding wire may be used. For example, the amount of winding wire pulled out L may be detected based on the number of rotations (rotation angle) of the winding reel 21. In addition, in this embodiment, the amount of winding wire pulled out detecting unit 23 is disposed downstream of the rectangular wire forming machine 22, but the position of the amount of winding wire pulled out detecting unit 23 is not limited to this, and the amount of winding wire pulled out from the winding reel 21 can be disposed in various positions where it can be detected.

[0031] The flaw detection unit 24 is located downstream of the rectangular wire forming machine 22 and upstream of the winding machine 27, and detects flaws in the winding (rectangular wire 11) after its cross-sectional shape has been deformed by the rectangular wire forming machine 22. In this embodiment, the flaw detection unit 24 is located downstream of the pull-out amount detection unit 23 and upstream of the tension device 25. The flaw detection unit 24 is connected to the controller 29, which allows the controller 29 to obtain information regarding the presence or absence of flaws in the winding from the flaw detection unit 24. In this embodiment, the flaw detection unit 24 detects flaws that penetrate the insulating coating on the surface of the winding conductor. An example of the flaw detection unit 24 is a pinhole checker that applies a voltage to the winding (rectangular wire 11) moving from the rectangular wire forming machine 22 to the winding machine 27, and monitors the current flow state (e.g., current leakage) to detect flaws in the winding (pinholes in the insulating coating). The flaws detected by the flaw detection unit 24 are not limited to flaws caused when the winding is deformed by the rectangular wire forming machine 22, but also include flaws that were originally present in the round wire 13 as initial defects. The method for detecting flaws by the flaw detection unit 24 is not limited to applying a voltage to the winding and monitoring the current flow state, and may be, for example, a method of identifying flaws from an external image of the winding taken by a CCD (Charge Coupled Device) camera or the like. Also, in FIG. 4, the flaw detection unit 24 is located upstream of the tension device 25, but this is not a limitation and it may be located downstream of the rectangular wire forming machine 22 and upstream of the winding machine 27.

[0032] The tension device 25 is disposed downstream of the rectangular wire forming machine 22 (in this embodiment, downstream of the flaw detection unit 24) and upstream of the nozzle 26. The tension device 25 has a tension pulley 25a and the like, and applies a tensile force to the winding (rectangular wire 11) between the rectangular wire forming machine 22 and the nozzle 26 to prevent the winding from loosening.

[0033] The nozzle 26 is disposed downstream of the rectangular wire forming machine 22 (in this embodiment, downstream of the tension device 25) and upstream of the winding machine 27, and supplies the rectangular wire 11 formed by the rectangular wire forming machine 22 to the tooth portion 9 side of the split core 7 on the winding machine 27 side. The nozzle 26 supplies the rectangular wire 11 formed by the rectangular wire forming machine 22 to the tooth portion 9 side of the split core 7 supported by the winding machine 27 so that the width direction W of the rectangular wire 11 is aligned with the axial direction A of the tooth portion 9 and the thickness direction T of the rectangular wire 11 is aligned with the radial direction R of the tooth portion 9 (see FIG. 3).

[0034] The winding machine 27 is disposed downstream of the nozzle 26. The winding machine 27 has a core support portion 32 capable of supporting (setting) the split core 7, and a rotation mechanism 33 that rotates the core support portion 32 about a rotation axis along the axial direction A of the teeth 9 of the split core 7. When the core support portion 32 is rotated by the rotation mechanism 33 with the split core 7 set on it, the split core 7 rotates relative to the nozzle 26 about the rotation axis along the axial direction A. When the winding machine 27 rotates the split core 7, the flat wire 11 is drawn out from the nozzle 26 and wound around the teeth 9 of the split core 7. The winding machine 27 may also include a guide member (not shown) that guides the flat wire 11 to a predetermined position on the teeth 9 of the split core 7. In addition, in this embodiment, the split core 7 set on the core support portion 32 of the winding machine 27 is rotated relative to the nozzle 26, but this is not limited to this, and for example, the nozzle 26 may be rotated relative to the split core 7 set on the core support portion 32 of the winding machine 27.

[0035] Notification unit 28 is a device that is controlled by controller 29 and can notify a user of information related to flaws in the winding (hereinafter referred to as "winding flaw information"). Winding flaw information is information that is notified to a user to prevent deterioration in product quality due to flaws in the winding, and examples thereof include information indicating the presence of flaws in the winding, information indicating the presence of a predetermined number or more of flaws in the winding, and information indicating the presence of flaws of a predetermined size or larger in the winding. Examples of notification unit 28 include a lamp that is visible to the user, a speaker that can generate sound or voice, and a display device that can display text and images. Notification of the winding flaw information by notification unit 28 is performed, for example, by turning on a lamp, emitting a buzzer sound or voice, or displaying text or images on a display device. In other words, notification of the winding flaw information by notification unit 28 is not limited to presenting detailed information about the flaws, but may simply be a notification for notifying the user of the winding flaw information. Note that the number of notification units 28 is not limited to one, and may be multiple. Furthermore, when a plurality of notification units 28 are provided, the notification units 28 may be of the same type, or may be of different types.

[0036] Controller 29 executes predetermined processing based on the detection of a flaw by flaw detection unit 24. Controller 29 includes a CPU (Central Processing Unit) and a memory unit (not shown), and functions as determination means 34 and device control means 35 by executing information processing in cooperation with software such as a program stored in the memory unit. Controller 29 is electrically connected to pull-out amount detection unit 23, flaw detection unit 24, and notification unit 28. Controller 29 can acquire information on the pull-out amount L of the winding detected by pull-out amount detection unit 23 and the presence or absence of a flaw in the winding detected by flaw detection unit 24 in real time.

[0037] The determination means 34 performs a predetermined determination to detect the above-mentioned winding flaw information. The determination means 34 may perform one or more predetermined determinations. The winding flaw information in this embodiment is information indicating that the number of flaws contained in the winding per unit amount (hereinafter simply referred to as "winding per unit amount") wound around one divided core 7 (winding target) is equal to or greater than a predetermined threshold (e.g., three). That is, in this embodiment, the determination means 34 determines whether the number of flaws contained in the winding per unit amount is equal to or greater than a predetermined threshold (the above-mentioned predetermined determination).

[0038] Fig. 7 is an explanatory diagram for detecting a flaw contained in a winding per unit amount. Fig. 7 shows a state in which a flaw i in the winding has moved downstream of the flaw detector 24.

[0039] The detection of defects in the winding per unit amount by the determination means 34 will be described based on FIG. 7. Here, the length A of the winding from the winding cutting position x where the winding is cut after winding the winding around the predetermined split core 7a to the defect detection unit 24, and the length B of the winding (winding per unit amount) wound around the next split core 7b continuously existing upstream from the winding cutting position x are determined to be constant lengths. When the defect detection unit 24 detects a defect i in the winding, the determination means 34 stores the winding extraction amount Li at that time in the storage unit every time a defect i is detected. Thereby, the determination means 34 can grasp the position of the current defect i (the moving distance downstream from the defect detection unit 24) from the difference (L - Li) between the current winding extraction amount L and the winding extraction amount Li at the time of defect detection. The determination means 34 calculates, for each defect i, the difference C (C = A - (L - Li)) between the length A of the winding from the winding cutting position x to the defect detection unit 24 and the moving distance (L - Li) of the defect i downstream from the defect detection unit 24. The determination means 34 determines, at an arbitrary timing (for example, the timing immediately before starting to wind the winding around the split core 7b) before supplying the winding to the next split core 7b, the number of defects i for which the difference C between the length A of the winding and the moving distance (L - Li) of the defect i is shorter than the length B of the winding per unit amount ((C < B)). That is, the controller 29 detects the number of defects in the winding per unit amount based on the current extraction amount L detected by the extraction amount detection unit 23 and the extraction amount Li when the defect detection unit 24 detects the defect i. Then, the determination means 34 makes a determination (the above-mentioned determination) as to whether or not the number of defects in the winding per unit amount is equal to or greater than a predetermined threshold value.

[0040] The device control means 35 executes a predetermined process when the determination means 34 determines that the number of flaws per unit amount of winding is equal to or greater than a predetermined threshold (winding flaw information is detected). In this embodiment, the device control means 35 controls the notification unit 28 to notify the winding flaw information. Note that in this embodiment, the device control means 35 executes the predetermined process on the notification unit 28, and the predetermined process is a notification by the notification unit 28. However, the device control means 35 does not limit the scope of the predetermined process to this. For example, as shown by the two-dot chain line in FIG. 4 , the device control means 35 may control the winding machine 27 as the target for executing the predetermined process when the determination means 34 detects winding flaw information. In this case, the device control means 35 may execute the predetermined process by stopping the winding machine 27. Alternatively, after winding is completed, the device control means 35 may separate the split core 7 on which the winding for which winding flaw information has been detected from the normal split core 7 and remove it from the winding machine 27. This makes it possible to prevent low-quality split cores 7 (for example, split cores 7 wound with wire containing many flaws) from being distributed.

[0041] The winding flaw information is not limited to information indicating that the number of flaws contained in the winding per unit amount is equal to or greater than a predetermined threshold, but may also be information indicating that a flaw is present in the winding, or information indicating that a flaw of a predetermined size or greater is present in the winding, as described above. For example, the predetermined determination made by determination means 34 may be a determination of whether or not flaw detection unit 24 has detected a flaw in the winding. In other words, device control means 35 may execute the predetermined process when flaw detection unit 24 detects a flaw in the winding.

[0042] In the winding device 20 configured as described above, the flaw detection unit 24 that detects flaws in the winding wire is located downstream of the rectangular wire forming machine 22, so flaws in the winding wire can be detected in real time during winding. This allows the user to take action based on flaws in the winding wire detected by the flaw detection unit 24, thereby preventing deterioration in the quality of products (segment cores 7 distributed on the market) caused by flaws in the winding wire.

[0043] Furthermore, since the device is provided with a controller 29 that executes predetermined processing based on the detection of flaws by the flaw detection unit 24, the detection result of flaws in the windings can be reflected in the operation of the notification unit 28, the winding machine 27, etc. This allows the user to recognize the presence of flaws, and allows the low-quality split cores 7 (to be wound) to be separated and removed, preventing the distribution of the low-quality split cores 7, thereby suppressing deterioration in product quality due to flaws in the windings.

[0044] Furthermore, when the determination means 34 makes the predetermined determination and the number of flaws contained in the winding per unit amount is equal to or greater than a predetermined threshold, the device control means 35 of the controller 29 executes a predetermined process. This allows the user to be made aware of the presence of low-quality split cores 7 and allows the low-quality split cores 7 to be separated and removed, thereby preventing low-quality split cores 7 from being distributed and suppressing deterioration in product quality due to flaws in the winding.

[0045] Furthermore, draw-out amount detection unit 23 detects the draw-out amount L of the winding, and controller 29 detects the number of flaws contained in the winding per unit amount based on the current draw-out amount L detected by draw-out amount detection unit 23 and the draw-out amount Li when flaw detection unit 24 detected flaw i. In this way, with a simple structure in which draw-out amount detection unit 23 is provided to detect the draw-out amount L of the winding, it is possible to detect the number of flaws contained in the winding per unit amount.

[0046] Furthermore, device control means 35 of controller 29 may execute the predetermined process when flaw detection unit 24 detects a flaw in the winding. For example, controller 29 may turn on a lamp (alert unit 28) and then immediately turn it off each time flaw detection unit 24 detects a flaw in the winding.

[0047] Furthermore, the device is provided with a notification unit 28 that is controlled by the controller 29 and can notify the user of the winding flaw information, allowing the user to take action in accordance with the winding flaw information, thereby preventing deterioration in the quality of the product (split core 7) caused by flaws in the winding.

[0048] As described above, according to this embodiment, defects in the winding can be detected in real time during winding, and therefore, even if the cross-sectional shape of the winding is deformed midway before being wound around the winding target, deterioration in product quality due to defects in the winding can be suppressed.

[0049] Although the present invention has been described above based on the above embodiment, the present invention is not limited to the content of the above embodiment, and can be modified as appropriate without departing from the scope of the present invention. In other words, all other embodiments, examples, operational techniques, etc. made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention. [Explanation of symbols]

[0050] 7: Split core (for winding) 11: Flat wire (wound wire) 13: Round wire (winding wire) 20: Winding device 21: Winding reel (wire supply source) 22: Flat wire forming machine (winding deformation section) 23: Pull-out amount detection unit 24: Flaw detection unit 27: Winding machine 28: Information Department 29: Controller (control unit)

Claims

1. A winding device that supplies a wire from a wire supply source to a winding target and winds the wire around the winding target, a winding deformation unit disposed downstream of the wire supply source and configured to change the cross-sectional shape of the winding; a flaw detection unit disposed downstream of the winding deformation unit and detecting flaws in the winding; a control unit that executes a predetermined process based on the detection of a flaw by the flaw detection unit; a withdrawal amount detection unit that detects the amount of the winding drawn from the wire supply source, The control unit executes the predetermined process when the number of flaws in the winding from the winding cutting position to the length per unit amount wound around one of the winding targets is equal to or greater than a predetermined threshold, and detects the number of flaws in the winding per unit amount based on the current drawn-out amount detected by the drawn-out amount detection unit and the drawn-out amount when the flaw detection unit detected the flaw. A winding device characterized by:

2. The control unit executes the predetermined process when the flaw detection unit detects a flaw in the winding.

2. The winding device according to claim 1.

3. a notification unit that is controlled by the control unit and that can notify information about a flaw in the winding, The predetermined process executed by the control unit includes a notification by the notification unit.

3. The winding device according to claim 1 or 2.

Images