Winding device and winding method

Abstract

To provide a winding device difficult to be influenced by manufacturing variation of a winding object, and capable of molding start and end terminals at proper positions.SOLUTION: A winding device 10 according to the present invention comprises: a wire supply part 11 for supplying a round-shaped wire; a molding part 12 provided on a downstream side of the wire supply part 11 and molding a shape of the wire into a rectangular shape; and a winding part 14 provided on a downstream side of the molding part 12 and winding the wire around a winding object. The molding part 12 performs start and end terminal processing for not molding portions of the wire corresponding to start and end terminals of the winding object, and molding processing for molding the wire corresponding to a wound portion of the winding object. The start and end terminal processing is performed when a supply length of the wire supplied after winding the winding object predetermined times reaches a predetermined length.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a winding device and a winding method. [Background technology]

[0002] When a flat wire is formed from a round wire using a flat wire forming device and the formed flat wire is wound around the teeth of a split core, there is a possibility that scratches will occur in the winding when the cross-sectional shape of the winding is changed.

[0003] Therefore, Patent Document 1 discloses a winding device that aims to prevent 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.

[0004] Specifically, the document discloses a winding device that supplies a winding from a wire supply source to a winding target and winds it around the winding target, characterized in that it comprises a winding deformation section that is arranged downstream of the wire supply source and changes the cross-sectional shape of the winding, and a flaw detection section that is arranged downstream of the winding deformation section and detects flaws in the winding. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2023-132628 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, in a wound object such as a divided stator core, both ends (also called start and end terminals) of the wound coil wire serve as lead portions for connection. For this reason, it is preferable that the ends of the wire wound around the winding target remain round so that the connecting work to be performed after the winding can be easily performed.

[0007] If an attempt is made to form such round end portions, the wire portions at the end portions will remain round without being shaped, and the subsequent portions to be wound around the winding target will be shaped into a rectangular shape.

[0008] Specifically, the initial short length portion that becomes the starting end is left as a round wire rod, and then the flat rectangular shape to be wound is formed, and the round wire rod at the starting end is not wound around the object to be wound, but the flat rectangular portion is wound around it.

[0009] Then, the short wire portions (also called the start and end portions) that correspond to the end portion of the current winding target and the start portion of the next winding target are again not formed but are made into round wire, and then they are formed into a rectangular shape corresponding to the winding portion, and then the short wire portions that should become the start and end portions are not formed, and this process is repeated.

[0010] In other words, when the wire is formed, there is a short, unformed portion, followed by a long, rectangular portion, and this is repeated.

[0011] When the start and end portions reach the end of the current winding target, they are cut to separate the end portion and the start portion, and the portion after the start portion becomes the wire for the next winding target, and this process is repeated to continuously wind the wire.

[0012] Incidentally, the divided stator cores to be wound naturally have variations in shape within the range of manufacturing tolerances. That is, the outer shape of the wound portion may be small or large, and variations in the outer shape appear as differences in the length of the wire required to wind the wire the same number of times.

[0013] Therefore, even if the number of windings around the winding target is the same, there will be variations in the required length of the wire to be wound, and if the positions for forming the start and end terminals are controlled based on the length of the wire supplied from the start of winding, there are cases where the start and end terminals cannot be formed in the appropriate positions due to the variations in the required length of the wire actually required to be wound.

[0014] Specifically, if the object to be wound is larger than the designed outer shape of the object, the wire will be wound longer than the designed winding length.

[0015] If the start and end portions are formed at the designed length position, the wire will actually be wound longer than designed, so the start and end portions will end up being wound around the object to be wound, and furthermore, the formed portion to be wound around the next object to be wound will be located at the position where the start and end portions should originally be.

[0016] When this happens, not only does the round wire end up inside the wound section, causing the winding to collapse, but the rectangular section that was formed ends up in the area that should be the termination, which increases the defect rate in the next connection process.

[0017] The present invention has been made in consideration of the above circumstances, and aims to provide a winding device and a winding method that are less susceptible to the influence of manufacturing variations in the winding object and that can form the start and end terminals at appropriate positions. [Means for solving the problem]

[0018] In order to achieve the above object, the present invention is realized by the following configuration. The winding device of the present invention is a winding device that winds wire around a winding object, and includes a wire supply section that supplies the round wire, a shaping section that is located downstream of the wire supply section and shapes the wire into a rectangular shape, and a winding section that is located downstream of the shaping section and winds the wire around the winding object, and the shaping section performs a start / end processing step in which no shaping is performed on the portions of the wire that correspond to the start and end of the winding object, and a shaping process in which the wire that corresponds to the portion to be wound around the winding object is shaped, and the start / end processing step is performed when the length of the wire that has been supplied after a predetermined number of windings has been performed around the winding object reaches a predetermined length.

[0019] The winding method of the present invention is a winding method for winding a wire around a winding object, and includes a start / end step for leaving the portions of the wire corresponding to the start and end of the winding object in a round shape without shaping them, and a shaping step for shaping the wire corresponding to the portion to be wound around the winding object into a rectangular shape, and the start / end step is performed when the length of the wire supplied after a predetermined number of windings around the winding object reaches a predetermined length. [Effects of the Invention]

[0020] According to the present invention, it is possible to provide a winding device and a winding method that are less susceptible to the influence of manufacturing variations in the winding object and that are capable of forming start and end terminals at appropriate positions. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view of a brushless motor having a divided core that can be suitably applied to a winding device of a first embodiment according to the present invention. [Figure 2] FIG. 2 is a side view of a portion corresponding to one divided core of the first embodiment according to the present invention. [Figure 3] FIG. 1 is a top view for explaining a winding device according to a first embodiment of the present invention. [Figure 4] FIG. 3 is a diagram for explaining a molding operation in a molding unit of the first embodiment according to the present invention. [Figure 5] FIG. 2 is a side view of the encoder portion of the first embodiment according to the present invention. [Figure 6] 10A and 10B are diagrams illustrating the content of correction performed by a length correction unit according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a mode for carrying out the present invention (hereinafter referred to as an "embodiment") will be described in detail with reference to the accompanying drawings. It should be noted that the same elements are denoted by the same numbers or symbols throughout the description of the embodiments.

[0023] (First embodiment) FIG. 1 is a perspective view of a brushless motor 1 having a divided core 7 that can be suitably applied to a winding device 10 (see FIG. 3) according to a first embodiment of the present invention. FIG. 2 is a side view of a portion corresponding to one of the divided cores 7 of the first embodiment according to the present invention.

[0024] As shown in FIG. 1, for example, a brushless motor 1 (also simply referred to as a motor) 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.

[0025] The stator 2 includes a stator core 4 , an insulating insulator 5 attached to the stator core 4 , and a coil 6 .

[0026] The stator core 4 is a split-core type stator core 4 formed by connecting a plurality of split cores 7 (one example of a wound object of the present invention) split in the circumferential direction in an annular shape.

[0027] As shown in Figure 2, a coil wire 8 (an example of the wire material of the present invention) is wound around the split core 7 to form the coil 6, but the coil wire 8 of the portion 8A wound around the split core 7 has a rectangular shape so that it can be wound as tightly as possible, increasing the density and improving the performance of the motor.

[0028] On the other hand, the coil wire 8 at the portion 8B (hereinafter referred to as the starting end, the ending end, or collectively as the starting end and the ending end) pulled out from the split core 7 is made into a round coil wire 8, which makes it less likely for defects to occur during the connection work of welding to a bus bar, etc. Since FIG. 2 is a side view, only the end of the start and end is shown, and the start end that overlaps towards the depth of the page is not visible.

[0029] The winding device 10 of this embodiment is a device suitable for winding a wire around a split core 7 while forming the winding portion into a rectangular shape while forming the start and end portions into a round shape, and will be described below with reference to Figures 3 to 5.

[0030] FIG. 3 is a top view for explaining the winding device 10 of the first embodiment according to the present invention. As shown in FIG. 3, the winding device 10 of this embodiment includes a wire supply unit 11 that supplies a round coil wire 8, a forming unit 12 that is provided downstream of the wire supply unit 11 and forms the coil wire 8 into a rectangular shape, a tension adjustment unit 13 that is provided downstream of the forming unit 12 and controls the tension during winding, and a winding unit 14 that is provided downstream of the forming unit 12 (more specifically, the tension adjustment unit 13) and winds the coil wire 8 around the split core 7.

[0031] The upstream side (upstream) means the wire supply section 11 side where the supply of the coil wire 8 starts, and the downstream side (downstream) means the opposite side, the winding section 14 side, and the same applies hereinafter.

[0032] The winding device 10 of this embodiment also includes an encoder ENC (an example of a supply length measuring unit of the present invention) that is provided between the forming unit 12 and the winding unit 14 (more specifically, between the forming unit 12 and the tension adjusting unit 13) and that measures the length of the coil wire 8 that has been supplied, a control unit PLC that is responsible for the overall control of the winding device 10, and a nozzle NZ that is provided between the tension adjusting unit 13 and the winding unit 14 and that supplies the coil wire 8 to the winding unit 14.

[0033] The wire supply unit 11 is a reel around which a round coil wire 8, a so-called magnet wire, is wound.

[0034] The forming section 12 comprises a first forming section 12A (only the upper forming roller is visible in the figure) having a pair of forming rollers that clamp and form the coil wire 8 from a first direction (top-bottom direction) perpendicular to the coil wire 8, and a second forming section 12B having a pair of forming rollers that clamp and form the coil wire 8 from a second direction (left-right direction) perpendicular to the coil wire 8 and the first direction.

[0035] FIG. 4 is a diagram for explaining the molding operation in the molding section 12 of the first embodiment according to the present invention, and is illustrated from left to right, from upstream to downstream. As shown in FIG. 4, the coil wire 8 supplied from the wire supply unit 11 is a round coil wire 8.

[0036] When the coil wire 8 passes through the first forming section 12A, the width of which is regulated by the upper and lower rollers, the vertical width is shaped to width X, and when it passes through the second forming section 12B, the width of which is regulated by the left and right rollers, the horizontal width is shaped to width Y. By passing through forming section 12, the coil wire 8 is shaped into a flat rectangular coil wire 8 having a vertical width of X and a horizontal width of Y, as shown on the right side.

[0037] The upper roller and the lower roller can be moved toward or away from each other by a drive mechanism (not shown), thereby changing the separation distance between the upper roller and the lower roller. Similarly, the left and right rollers can be moved toward and away from each other by a drive mechanism (not shown), thereby changing the separation distance between the left and right rollers.

[0038] Therefore, in order to prevent the coil wire 8 corresponding to the beginning and end portions from being shaped, a drive mechanism (not shown) drives the coil wire 8 so as to increase the distance between the upper roller and the lower roller and the distance between the left roller and the right roller, so that the round coil wire 8 supplied from the wire supply unit 11 passes through without being shaped, and the round coil wire 8 remains at the beginning and end portions.

[0039] As shown in FIG. 3, the tension adjustment unit 13 includes tension rollers (first tension roller 13A and second tension roller 13B) and a motor (not shown) that rotates the tension rollers.

[0040] The tension rollers of this embodiment (first tension roller 13A and second tension roller 13B) are designed to have a high gripping force so that the coil wire 8 can be pulled out from the molded portion 12 without slippage occurring between them.

[0041] Specifically, the diameter of the tension rollers (first tension roller 13A and second tension roller 13B) is set to 150 mmφ to increase the contact area with the coil wire 8, and at least the part that comes into contact with the coil wire 8 is made of a natural rubber material with high friction resistance and a Shore hardness equivalent to A90. Regarding the diameter, if it is too large it will require more space, so it is best to keep it between 140mmφ and 200mmφ, for example.

[0042] Although not shown, the first tension roller 13A and the second tension roller 13B are connected by a belt, and by driving the belt with a motor, the first tension roller 13A and the second tension roller 13B rotate in synchronization.

[0043] In this configuration, both the first tension roller 13A and the second tension roller 13B are drive rollers, so the driven roller does not act as a load on the drive roller, as would occur if the other roller were a driven roller that simply rotated in accordance with the movement of the coil wire 8, and this contributes to preventing slippage between the coil wire 8 and the drive roller.

[0044] FIG. 5 is a side view of the encoder ENC portion of the first embodiment according to the present invention. The illustration enclosed in the balloon in FIG. 5 is a plan view showing only the rotating disk E1. Also, in FIG. 5, a unit that calculates the length of the supplied coil wire 8 based on the detection result detected by a detector of the encoder ENC, which will be described later, is not shown. However, it is not necessary to be limited to providing a calculation unit, and the control unit PLC described later may perform calculations to determine the length of the supplied coil wire 8 based on the detection results detected by this detection unit.

[0045] The encoder ENC has a detection unit (described later) provided between the forming unit 12 and the winding unit 14 (more specifically, the tension adjustment unit 13), and is a measurement unit that measures the length of the supplied coil wire 8. As will be described later, it is important that accurate measurements can be made in order to determine the start and end timings.

[0046] Depending on the structure of the encoder, the load on the detection mechanism may be large, which may make it difficult for the roller R to rotate, causing slippage between the roller R and the coil wire 8 and making detection unstable. If this happens, the accuracy of the length of the coil wire 8 that is determined based on the detection result will be poor.

[0047] Therefore, as shown in Figure 5, the encoder ENC of this embodiment has, as a detection unit, a pair of rollers R that rotate in contact with the coil wire 8, a rotating disk E1 that has slits S evenly spaced circumferentially and is attached to the rotation axis of one of the rollers R, and an optical sensor E2 (an example of a passing sensor of the present invention) that detects the passage of the rotating disk E1 through the slit S in a non-contact manner, and the rotating disk E1 and the optical sensor E2 that constitute the detection mechanism (see the area surrounded by dotted lines in Figure 5) are non-contact, thereby significantly reducing frictional resistance.

[0048] Therefore, the rollers R provided on the turntable E1 rotate easily, and as a result, slippage between the rollers R and the coil wire 8 is suppressed, making it possible to measure the supply length stably.

[0049] This structure detects the rotation state (number of rotations) of roller R as it passes through slit S, and calculates the length of the coil wire 8 that has passed from the number of rotations of roller R and the circumference (perimeter) of the contact part between roller R and coil wire 8, thereby measuring the length of the supplied coil wire 8.

[0050] The winding section 14 is equipped with a rotation mechanism (not shown) that winds the coil wire 8 supplied to the split core 7 by rotating the split core 7 while holding the split core 7 and the starting end of the coil wire 8.As a result, the starting end held by the rotation mechanism is not wound around the split core 7, and then the flat-shaped coil wire 8 supplied in accordance with the rotation is wound around the split core 7.

[0051] The winding portion 14 also includes a servo motor (not shown) for rotating the rotation mechanism, and a cutting portion (not shown) for cutting the start and end portions to separate them into the start and end portions.

[0052] In this embodiment, the output signal regarding the rotation speed from the servo motor (not shown) is received by the control unit PLC (described later) (see arrow DT1 in Figure 3), and the control unit PLC is configured to be able to grasp the number of rotations of the split core 7 (i.e., the number of times the coil wire 8 is wound).

[0053] However, a separate encoder may be provided to detect the number of rotations of the rotation mechanism (not shown), and the control unit PLC may acquire the detection results of the encoder, thereby enabling the control unit PLC to grasp the number of rotations of the split core 7.

[0054] The control unit PLC is a so-called sequencer that includes a memory unit (not shown) that stores programs for performing control operations, received data, and results of calculations performed based on the received data, a central processing unit (not shown) that performs the calculations, and a touch panel display unit (not shown) that allows settings to be input, etc. However, it is not limited to a sequencer and may be a PC or the like.

[0055] Then, the operator touches the display unit to input the predetermined number of windings around the divided core 7 at which the measurement of the supply length is to be started.

[0056] Furthermore, after the coil wire 8 has been wound around the split core 7 a predetermined number of times, the operator touches the display unit to input a predetermined length to indicate how long the supplied coil wire 8 should be to form the start and end ends, and in this state the winding device starts winding.

[0057] It should be noted that this input only needs to be done once, at the beginning, when the operation of winding the coil wire 8 around the split core 7 of the same design is repeated.

[0058] To make it easier to understand, let us take an example. For example, suppose that the winding is completed when the coil wire 8 is wound 32 times around the split core 7, and the input specified number of times and specified length are 20 times and 4 m, respectively. Please note that the above examples are merely examples to make the explanation easier to understand.

[0059] When winding of the coil wire 8 around the split core 7 begins, the control unit PLC monitors how many rotations the split core 7 has made, i.e., the number of times the split core 7 has been wound, based on an output signal regarding the number of rotations from the servo motor (not shown).

[0060] Then, when the number of windings around the split core 7 reaches the input predetermined number of 20, the control unit PLC issues a command to the encoder ENC to start measuring the length of the coil wire 8 being supplied.

[0061] Then, the encoder ENC starts measuring the supply length and sequentially transmits the measurement results of the measured supply length to the control unit PLC (see arrow DT2 in FIG. 3), and the control unit PLC monitors the transmitted supply length.

[0062] Then, when the supply length reaches the input predetermined length of 4 m, the control unit PLC issues a command (see dotted arrow CM in Figure 3) to the forming unit 12 to execute start and end terminal processing that does not involve forming.

[0063] That is, the start and end termination processes are performed when the length of the coil wire 8 supplied after being wound 20 times (predetermined number of times) around the split core 7 reaches 4 m (predetermined length).

[0064] Then, upon receiving a command to execute the start and end processing, the forming unit 12 drives a drive mechanism (not shown) to increase the distance between the upper roller and the lower roller and the distance between the left roller and the right roller, so that the round coil wire 8 passes through without being formed.

[0065] In this way, the forming unit 12 performs start and end termination processing on the portions of the coil wire 8 corresponding to the start and end terminals of the divided core 7 without forming them.

[0066] In addition, the control unit PLC continues to monitor the supply length even after issuing a command to execute the start and end terminal processing, and after issuing the command to execute the start and end terminal processing, issues a command to the forming unit 12 to execute the forming process (see dotted arrow CM in Figure 3) when the coil wire 8 has been supplied for the length of the start and end terminal portions.

[0067] Upon receiving a command to execute the forming process, the forming unit 12 drives a drive mechanism (not shown) to narrow the distance between the upper roller and the lower roller and the distance between the left roller and the right roller, thereby forming the round coil wire 8 into a rectangular shape.

[0068] In this manner, the forming unit 12 performs a forming process to form the coil wire 8 corresponding to the portion to be wound around the split core 7. When winding is completed and stopped, it usually stops in the state where the forming process is being carried out, so the next winding starts from the state where the forming process is being carried out.

[0069] Then, when the number of rotations (number of windings) of the split core 7 reaches 32, the control unit PLC sends a command to the winding unit 14 to end the winding, and upon receiving this command, the winding unit 14 stops the rotation and operates the cutting unit (not shown) to perform a cutting process in which the start and end portions are cut into the start and end portions.

[0070] Conventionally, winding is actually performed using a divided core 7 close to the design center, data is collected to measure the supply length from the start of winding to perform the start and end terminal processing, and the start and end terminal processing is performed when the supply length measured from the start of winding is reached.

[0071] In this case, for example, if the coil wire 8 is wound around a split core whose outer dimensions are larger or smaller than the split core 7 for which data was collected within the range of manufacturing tolerances, the start and end portions will be as follows. For example, if the outer diameter of the split core 7 is large within the range of manufacturing tolerances and one winding is Z mm long, then when wound 32 times, the coil wire 8 will be wound 32×Z mm long.

[0072] In other words, the start and end portions are wound into the split core 7 by 32 x Z mm, and as a result, the rectangular coil wire 8 formed following the start and end portions is positioned where it should be.

[0073] On the other hand, if, as in this embodiment, measurement of the supply length is not performed until a certain number of windings has been reached and measurement is started when the number of windings has reached a predetermined number, for example, in the above example, the predetermined number is 20, so the remaining number is 12, and the error that occurs there is limited to 12 × Z mm, making it possible to position the start and end portions at more appropriate positions.

[0074] In this way, the winding method using the winding device 10 of this embodiment includes a start / end step in which the portions of the coil wire 8 corresponding to the start and end of the split core 7 are not shaped but remain round, and a shaping step in which the coil wire 8 corresponding to the portion to be wound around the split core 7 is shaped into a rectangular shape, and the start / end step is performed when the length of the supplied coil wire 8 reaches a predetermined length after a predetermined number of windings have been made around the split core 7.This makes it less susceptible to the effects of variations in the manufacturing tolerances of the split core 7, and as a result, the start and end portions can be formed in appropriate positions.

[0075] The predetermined number of windings may be determined in consideration of the length of the pass line from the forming section 12 to the split core 7, so that the length of the coil wire 8 wound by the remaining number of windings is longer than the length of the pass line. This is because there is no problem in issuing a command for start / end processing after a predetermined number of windings have been performed.

[0076] Furthermore, the predetermined length may be theoretically determined by determining the length of supply required to issue a command for start and end termination processing after a predetermined number of windings have been performed, or, as mentioned above, may be determined by actually winding using a divided core 7 that is close to the center of the design and collecting data.

[0077] (Second embodiment) Next, a winding device 10 according to a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the basic configuration is similar to that of the first embodiment, and therefore, explanations of the same points as those in the first embodiment may be omitted.

[0078] The second embodiment differs from the first embodiment mainly in that the control unit PLC functions as a length correction unit that corrects the predetermined length based on the shape variation of the split core 7 (the object to be wound), and the winding device 10 is equipped with a length correction unit that corrects the predetermined length based on the shape variation of the split core 7 (the object to be wound).

[0079] FIG. 6 is a diagram illustrating the content of correction performed by the length correcting unit according to the second embodiment of the present invention. 6 is a plan view showing the shape of the trunk portion of the split core 7 around which the coil wire 8 is wound.

[0080] FIG. 6 also shows a reference divided core 7, which is close to the design center for which data was collected as described in the first embodiment. Specifically, the positions of the left short sides are aligned, and the position of the right end side of the divided core 7 serving as the reference is indicated by a dotted line.

[0081] As shown in FIG. 6, although the divided core 7 has curved surfaces at the four corners, it basically has a shape close to a rectangle, and the length of the long side is indicated as L.

[0082] When the coil wire 8 is wound, it is the portion corresponding to this long side that will be wound long.

[0083] Therefore, before winding, the length L of the split core 7 is measured, and the difference between this and the long side length L' of the split core 7 used as the reference is calculated, and the specified length described in the first embodiment is corrected using this difference in length.

[0084] Specifically, the winding device 10 further includes a length measuring device (not shown) for measuring the length L of the split core 7, and the length measuring device transmits the measured length L to the control unit PLC.

[0085] Then, the control unit PLC that has received the length L obtains a value δL (= L - L') obtained by subtracting the long-side length L' of the reference split core 7 from the measured length L, and determines how much length deviation will occur with the remaining winding turns after a predetermined number of turns.

[0086] Specifically, since there are two long sides, a deviation of 2×δL in length occurs in one winding. In the example of the first embodiment, since the remaining number of winding turns was 12, this deviation occurs 12 times during these 12 windings. Therefore, a deviation of 12×2×δL in length occurs with the remaining winding turns after a predetermined number of turns.

[0087] Therefore, the control unit PLC functions as a length correction unit including the calculation for obtaining the length deviation, adds the obtained length deviation to the predetermined length, and corrects the predetermined length. In the case where L > L', since the required length of the coil wire 8 required for winding shifts in the direction of increasing length, correction can be achieved by adding it to the predetermined length as described above.

[0088] Also, in the reverse case, that is, when L < L', the required length of the coil wire 8 required for winding becomes shorter. In this case, since the calculation result of the value δL is a negative value, correction can still be achieved by adding it to the predetermined length as described above.

[0089] Then, the start and end processing described in the first embodiment above is performed when the supplied length of the coil wire 8 reaches the predetermined length corrected by the length correction unit.

[0090] By doing so as described above, the control unit PLC functioning as the length correction unit performs correction of the predetermined length based on the shape variation of the split core 7, so that the influence of the variation in the outer shape due to the manufacturing tolerance of the split core 7 can be further reduced.

[0091] In the second embodiment, the length of the long side is measured and used for correction because it can be easily measured, but it goes without saying that the circumference may also be measured and used for correction.

[0092] Although the present invention has been described above based on specific embodiments, the present invention is not limited to the above embodiments.

[0093] For example, although the tension adjusting unit 13 is shown as using two tension rollers, it may be provided with three or more tension rollers. In this case too, it is preferable that the tension rollers are all drive rollers that are driven synchronously.

[0094] In this way, the content that can be understood from the embodiments, as well as modifications and improvements to the embodiments, are included in the technical scope of the invention, and this is clear to those skilled in the art from the description of the claims. [Explanation of symbols]

[0095] 1...brushless motor, 2...stator, 3...rotor, 4...stator core, 5...insulator, 6...coil, 7...split core, 8...coil wire, 8A, 8B...part, 10...winding device, 11...wire supply section, 12...forming section, 12A...first forming section, 12B...second forming section, 13...tension adjustment section, 13A...first tension roller, 13B...second tension roller, 14...winding section, E1...turntable, E2...optical sensor, ENC...encoder, L...length, NZ...nozzle, PLC...control section, R...roller, S...slit

Claims

1. A winding device for winding a wire around a winding target, The winding device includes: a wire supply unit that supplies the round wire; a forming section provided downstream of the wire supply section and configured to form the wire into a rectangular shape; a winding section provided downstream of the forming section and configured to wind the wire around the winding target, The molding portion is a start / end termination process in which no shaping is performed on portions of the wire corresponding to the start and end terminals of the winding target; a forming process for forming the wire corresponding to the portion to be wound around the winding target; The winding device, wherein the start / end termination process is performed when the length of the supplied wire reaches a predetermined length after the winding has been performed a predetermined number of times around the winding target.

2. 2. The winding device according to claim 1, further comprising a detection unit provided between the forming unit and the winding unit, the detection unit including a supply length measuring unit that measures the length of the supplied wire.

3. The detection unit a roller that rotates in contact with the wire; a rotating disk having slits at equal intervals in a circumferential direction and provided on a rotation shaft of the roller; 3. The winding device according to claim 2, further comprising a passage sensor for detecting the passage of the rotating disk through the slit in a non-contact manner.

4. the winding device includes a length correction unit that corrects the predetermined length based on shape variations of the winding object, 4. The winding device according to claim 1, wherein the start and end termination processes are performed when the length of the supplied wire reaches a predetermined length corrected by the length correcting unit.

5. A winding method for winding a wire around a winding target, comprising: The winding method includes: a start / end step of leaving the portions of the wire rod corresponding to the start and end terminals of the winding target as round without forming them; a forming step of forming the wire rod corresponding to the portion to be wound around the winding target into a rectangular shape, The winding method, wherein the start / end termination step is performed when a length of the supplied wire reaches a predetermined length after a predetermined number of windings have been performed on the winding target.

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