JP6593877B2 - Coil manufacturing apparatus and method - Google Patents

Description

  The present invention relates to a coil manufacturing apparatus for manufacturing a coil by spirally winding a wire around a core that forms a closed magnetic circuit such as ferrite or an iron core, and a manufacturing method thereof.

  Conventionally, as a device for manufacturing a ring-shaped toroidal coil used for a noise filter or the like, a wire rod guide unit for guiding a wire rod to the core from a direction intersecting with the thickness center line of the ring-shaped core forming a closed magnetic circuit; There has been proposed an apparatus including a coil forming portion having a deformed surface to which the wire is pressed and contacted at the tip of the wire guided by the wire guide (see, for example, Patent Document 1). And in such an apparatus, it is supposed that it can wind around a core, curving a wire, changing the advancing direction of a wire to the core side by press-contacting a wire on the deformation surface.

JP 2004-327461 A

  However, in the conventional coil manufacturing apparatus, since the wire is wound around the core by inserting the tip of the wire into the hole of the core that forms the closed magnetic path by curving the wire, a linear shape is formed around the tip of the wire. If there is a surplus tip portion and the length of the surplus tip portion exceeds the inner diameter of the core, the surplus tip portion cannot be inserted into the core hole.

  For this reason, when the extra length tip of the wire wound around the core is used as a terminal as it is, the length of the extra tip of the wire that can be used as the terminal cannot exceed the inner diameter of the core. There was a bug.

  When the tip of the wire wound around the core can be used as a terminal, if the extra length of the wire is not long enough, the part of the wire wound around the core is conventionally unwound and the terminal Or forcibly pulling out the tip of the wire in a state where the wire is wound around the core and using it as a terminal.

  However, when a part of the wound wire is unwound and used as a terminal, there is a problem that the number of turns formed in the core of the wire decreases, and when the end of the wire is forcibly pulled out and used as a terminal, The outer diameter of the coil made of the wire wound around the core is reduced, and the coil is distorted as a whole, and there has been a problem that the expected coil characteristics change.

  An object of the present invention is to provide a coil in which the tip of the wire wound around the core can have a length exceeding the inner diameter of the core without changing the number of turns formed in the core of the wire and the outer diameter of the wound wire. An object of the present invention is to provide a manufacturing apparatus and a manufacturing method thereof.

  The coil manufacturing apparatus of the present invention includes a wire rod feeding portion that feeds a wire rod, a coil forming portion that curves the wire rod fed from the wire rod feeding portion so as to pass through the vicinity of the outer periphery of the core and winds the wire around the core. The wire rod has a gripping portion for gripping the end portion of the wire rod wound around the core, and a wire rod drawing portion for pulling out the wire tip end portion gripped by the gripping portion. The wire rod drawing portion feeds the wire rod. However, it is arranged so that it is possible to pull out the end portion of the extra line synchronously.

  In this case, a wire rod guide portion that guides the wire rod fed from the wire rod feeding portion to the core is provided, and a deformation surface is formed on the coil forming portion where the wire rod guided by the wire rod guide portion is pressed, and the coil forming portion is deformed. It is preferable to curve the wire rod by changing the traveling direction of the wire rod fed out by pressing the wire rod on the surface to the core side.

  If the core is a square closed magnetic path core, the base on which the bottom of the round closed magnetic path core is seated, the gripping tool gripping the upper part of the round closed magnetic path core, and the gripping tool A gripper moving means that can move the gripper so as to press the square closed magnetic path core against the pedestal is provided, and the wire guide part guides the wire in a direction intersecting one side of the square closed magnetic path core. It can also be configured as follows.

  Further, if the wire is a flat wire, it is preferable that the coil forming portion for winding the flat wire around the core is curved so that the short side of the flat wire becomes the inner diameter surface.

  Further, in the case of providing a cutting device for making a cut into the wire fed from the wire guide part, the cutting device has an upper blade for making a wedge-like cut on the upper surface of the flat wire and a lower blade for making a wedge-like cut on the lower surface of the flat wire. It is preferable to include a blade, a cutting drive device for engaging the upper blade and the lower blade, and a stopper for preventing the flat wire from being cut when the upper wire and the lower blade are engaged with each other.

  On the other hand, the coil manufacturing method of the present invention includes a wire winding step of winding a wire rod around a core while spirally turning an end portion of a wire rod fed from a wire rod feeding portion around the core, and after winding And a leading end drawing step of pulling out the leading end of the remaining wire synchronously while gripping the trailing end of the wire and feeding the wire from the wire feeding portion.

  In this case, if the core is a square closed magnetic path core, it is preferable that the wire is drawn out from the direction intersecting one side of the round closed magnetic path core in the wire winding step and wound around the core. If is a flat wire, it is preferable to wind the flat wire around the core by edgewise winding so that the short side of the flat wire becomes the inner diameter surface in the wire winding step.

  Then, before the wire winding step, the wire rod operation step for feeding the flat wire to the end of cutting and the cutting position, the cutting step for simultaneously making a wedge-shaped cut on the upper surface and the lower surface of the flat wire, and pulling back the rectangular wire with the cut. It is also possible to perform a pulling process and a cutting process in which the core is moved and the rectangular wire is cut by cutting after the leading end pulling process.

  Even in the coil manufacturing apparatus and the manufacturing method thereof according to the present invention, the wire rod that is drawn out from the wire rod feeding portion and passes through the vicinity of the outer periphery of the core is sequentially bent by the coil forming portion, and the wire rod that circulates spirally is the core. Therefore, it is not possible to form a relatively long extra-long tip portion as in the prior art in the wire winding step.

  However, in the coil manufacturing apparatus and the manufacturing method thereof according to the present invention, the gripping part and the wire drawing part are provided, and the leading end of the extra wire is drawn out in the leading part drawing process. A long tip can be formed.

  And in the tip part drawing process, the wire end is pulled out synchronously while feeding the wire from the wire feeding part, so the number of turns formed in the core of the wire and the outer diameter of the coil made of the wound wire The tip of the wire wound around the core can be made longer than the inner diameter of the core without changing the length.

It is the sectional view on the AA line of FIG. 2 which shows the manufacturing apparatus of the coil of embodiment of this invention. It is a front view which shows the manufacturing apparatus of the coil. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is the EE sectional view taken on the line of FIG. It is the FF sectional view taken on the line of FIG. It is the GG sectional view taken on the line of FIG. It is a figure which shows the state from which the wire was drawn | feeded out and the notch was made into the wire. It is a figure which shows the state which cut | disconnected the nozzle side edge part of the wire wound around the one winding side of a core. It is a top view of the core which shows the procedure in which a wire is wound around the one winding side. It is a front view of the core which shows the procedure in which a wire is wound around the one winding side. It is a top view of the core which shows the procedure in which a wire is wound around the other winding side. It is a front view of the core which shows the procedure in which a wire is wound around the other winding side. It is a figure which shows the state which pulls out the extra length front-end | tip part of the wire wound around the other winding side. It is a figure which shows the state which cut | disconnected the nozzle side edge part of the wire wound around the other winding side. It is a front view of the coil obtained by this embodiment.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 2 shows a coil manufacturing apparatus 20 according to the present invention. In the manufacturing apparatus 20, the wire 14 is spirally swung around the core 11, and the wire 14 is wound around the core 11. Here, the core 11 means that which forms a closed magnetic path, and includes a ring core whose closed magnetic path forms an annular shape, and a closed-shaped closed magnetic path core whose closed magnetic path forms a square shape. That is, the coil manufacturing apparatus 20 according to the present invention automatically manufactures the coil 12 (FIG. 17) in which the wire 14 is spirally wound around the core 11 forming the closed magnetic path.

  In this embodiment, as shown in FIG. 3, the case where the core 11 is a square closed magnetic circuit core 11 made of a ferrite sintered body or the like is shown. A pair of winding sides 11a and 11b that are wound in parallel with each other, and connecting sides 11c and 11d that connect both ends of the pair of winding sides 11a and 11b, respectively, are provided. And the manufacturing apparatus of this invention winds the wire 14 around a pair of winding sides 11a and 11b, respectively, as shown in FIG. 17, and the wire wound around the core 11 and its pair of winding sides 11a and 11b The case where the coil 12 which consists of 14 is manufactured is demonstrated.

  On the other hand, the wire 14 wound around the square closed magnetic path core 11 is a so-called thick line that can maintain its shape when bent. In this embodiment, a case is used in which a wire 14 made of a so-called rectangular wire having a rectangular cross section with an insulating film formed on the surface thereof is used. If the wire 14 is a flat wire, it can be expected to increase the space factor of the wire 14 in the coil 12 and to improve the heat dissipation from the wire 14. However, the wire 14 is not limited to a flat wire, and a round wire having a circular cross section may be used according to the specifications of the coil 12 and the like.

  As shown in FIG. 2, the wire 14 is wound around a reel 17, and the reel 17 serves as a supply source of the wire 14. The reel 17 is placed on a floor, for example, behind the apparatus 20 at a place different from the manufacturing apparatus 20. Here, regarding the coil manufacturing apparatus 20 of the present invention, three axes X, Y, and Z that are orthogonal to each other are set, the X axis extends in the horizontal front-rear direction, the Y axis extends in the horizontal horizontal direction, and the Z axis extends in the vertical direction. explain.

  First, the coil manufacturing apparatus 20 includes a wire rod feeding unit 31 that feeds the wire 14. The wire rod feeding unit 31 includes a plurality of pairs of wire rod 14 feed rollers 33 and 34 for feeding the wire rod 14 by sandwiching and rotating the wire rod 14.

  As shown in FIGS. 2 and 4, a mounting plate 36 extending in the X-axis direction is erected on the base 20a. The plurality of pairs of wire 14 feed rollers 33 and 34 sandwich the wire 14 that is unwound from the reel 17 serving as a supply source and extends in the X-axis direction from above and below. In this embodiment, four pairs of rollers 33 and 34 are provided. The case where 34 is provided is shown.

  Since the four pairs of rollers 33 and 34 have the same structure, one of them will be described as a representative. As shown in FIG. 4, the outer periphery of the pair of rollers 33 and 34 is below the wire 14 as shown in FIG. The lower roller 33 coming into contact with the mounting plate 36 is pivotally supported. A wire feed actuator 38 capable of moving the slider 38a in the Z-axis direction is attached to the attachment plate 36 above the lower roller 33 in the Z-axis direction, and a support plate 39 is attached to the slider 38a. An upper roller 34 that sandwiches the wire 14 together with the lower roller 33 is pivotally supported at the lower portion of the support plate 39, and a feed servo motor 41 that rotates the upper roller 34 is attached to the support plate 39.

  The wire feeding actuator 38 in this embodiment is a fluid pressure cylinder configured to be able to move the slider 38a by supplying and discharging fluid such as compressed air. An auxiliary plate 40 that contacts the upper edge of the wire rod feeding actuator 38 is fixed to the mounting plate 36, and a bolt 40 a whose lower end can be in contact with the upper edge of the support plate 39 is screwed into the auxiliary plate 40. Then, the bolt 40a is loosened, the bolt 40a is separated from the upper edge of the support plate 39, and the slider 38a is lifted by the wire rod feeding actuator 38 in this state, whereby the upper roller 34 is lifted and the wire rod 14 is free to move. Configured to be possible. On the other hand, when the slider 38a is lowered by the wire rod feeding actuator 38, the upper roller 34 sandwiches the wire rod 14 together with the lower roller 33. When the feeding servo motor 41 is driven in this state, the upper roller 34 rotates and moves up and down. It is comprised so that the wire 14 pinched | interposed by the wire 14 feed rollers 33 and 34 can be sequentially paid out in the longitudinal direction.

  Reference numeral 20c in FIG. 2 is a scissoring device that straightens the wire 14 fed from the reel 17 as a supply source, and the wire 14 is sequentially clamped from the periphery by a plurality of small rollers 20d. It is configured to stretch straight. Reference numeral 35 in FIG. 2 is a guide material that supports the wire 14 between the pair of rollers 33 and 34 and the pair of rollers 33 and 34 adjacent thereto, and prevents the wire 14 from being bent. is there.

  Further, the bolt 40a screwed to the auxiliary plate 40 is tightened and lowered, and the lower end thereof is pressed against the upper edge of the support plate 39, thereby enhancing the force sandwiching the wire 14 between the upper roller 34 and the lower roller 33. It is something to be made. However, when the force for sandwiching the wire 14 between the upper roller 34 and the lower roller 33 generated by lowering the slider 38a by the wire feed actuator 38 is sufficient, the bolt 40a is not always necessary. It is not necessary to provide it.

  In addition, the coil manufacturing apparatus 20 is gripped by a pedestal 43 on which the bottom surface of the square closed magnetic path core 11 is seated, a gripping tool 44 gripping the upper part of the rounded closed magnetic path core 11, and the gripping tool 44. A gripping tool moving means 45 is provided that can move the gripping tool 44 so as to press the square closed magnetic path core 11 against the pedestal 43.

  The pedestal 43 has a horizontal upper surface, and a pedestal main body 43a on which the connecting side 11d (FIG. 3), which is the bottom surface of the square closed magnetic path core 11, is seated, and the pedestal main body 43a are provided at the tip. And a support portion 43b extending in the X-axis direction. On the upper surface of the base body 43a, a ridge 43c that determines the position in the X-axis direction of the connecting piece 11d on the lower side of the core 11 is formed extending in the Y-axis direction at an end portion on the wire rod feeding portion 31 side. Then, the core 11 is positioned in the X-axis direction by seating the bottom surface of the connecting piece 11d on the upper surface of the base body 43a in a state where the side surface of the wire rod feeding portion 31 of the connecting piece 11d is in contact with the protruding line 43c. The wire 14 is fed straight out from the wire feeding portion 31 in the vicinity of the pair of winding sides 11a and 11b around which the core 11 whose position is determined in the X-axis direction is wound (FIGS. 11 and 13). ), The base end of the support portion 43 b is fixed to the mounting plate 36.

  As shown in detail in FIG. 3, the gripping tool 44 in this embodiment is a fluid pressure cylinder 44 that contacts and separates a pair of sandwiching pieces 44 a and 44 b depending on whether or not fluid pressure is supplied, and includes a pair of sandwiching pieces 44 a and 44 b. Notches 44c and 44d into which the ends of the connecting side 11c of the core 11 enter are formed on the inner sides of the tip of 44b facing each other. Therefore, the pair of sandwiching pieces 44a and 44b are separated from each other, both ends of the connecting side 11c of the core 11 are inserted between the notches 44c and 44d, and in this state, the pair of sandwiching pieces 44a and 44b are connected to each other. By making it approach, this holding tool 44 is comprised so that the square-shaped closed magnetic circuit core 11 can be hold | maintained.

  As shown in FIGS. 2 and 3, the gripping tool moving means 45 in this embodiment capable of moving such a gripping tool 44 is a combination of X-axis, Y-axis, and Z-axis direction expansion and contraction actuators 46 to 48. Composed. The telescopic actuators 46 to 48 constituting the gripper moving means 45 are elongated box-shaped housings 46d to 48d and are extended in the longitudinal direction inside the housings 46d to 48d, and are rotationally driven by servo motors 46a to 48a. Ball screws 46b to 48b, and followers 46c to 48c that are screwed into the ball screws 46b to 48b to move in parallel. When each of the telescopic actuators 46 to 48 is driven by the servo motors 46a to 48a and the ball screws 46b to 48b are rotated, the followers 46c to 48c screwed into the ball screws 46b to 48b are the longitudinal lengths of the housings 46d to 48d. It is configured to be movable along the direction.

  In this embodiment, the housing 46d of the X-axis direction expansion / contraction actuator 46 is attached to the follower 47c of the Y-axis direction expansion / contraction actuator 47 so that the X-axis direction expansion / contraction actuator 46 extending in the X-axis direction can be moved in the Y-axis direction. Further, the housing 47d of the Y-axis direction expansion / contraction actuator 47 is attached to the follower 48c of the Z-axis direction expansion / contraction actuator 48 so that the X-axis and Y-axis direction expansion / contraction actuators 46, 47 can move in the Z-axis direction. The housing 48d of the Z-axis direction extendable actuator 48 is fixed to the base 20a. The servo motors 46a to 48a in each of the telescopic actuators 46 to 48 are connected to control outputs of a controller (not shown) that controls them.

  The gripping tool 44 is attached to the follower 46 c of the X-axis direction expansion / contraction actuator 46 via a rotation motor 49. Specifically, the X-axis direction expansion / contraction actuator 46 is attached so that its follower 46c is movable in the X-axis direction on the lower surface of the housing 46d. As shown in detail in FIG. 3, the rotary motor 49 moves the rotation shaft 49a downward. The main body 49b is attached to the follower 46c toward the head. The gripping tool 44 has a pair of gripping pieces 44a and 44b facing downward, and its main body 44e is attached to the rotating shaft 49a of the rotary motor 49, and the rotating shaft 49a rotates, whereby the gripping tool 44 is paired. The core 11 sandwiched between the pieces 44a and 44b is configured to be rotatable around the Z axis.

  Referring back to FIG. 2, the coil manufacturing apparatus 20 of the present invention includes a wire rod guide portion 32 that guides the wire rod 14 sent from the wire rod feeding portion 31 to the core 11 installed on the table 43. The wire guide part 32 in this embodiment is a straight nozzle 32 that extends from the supply source 17 and is sandwiched between upper and lower wire feed rollers 33 and 34 and into which the wire 14 delivered in the X-axis direction can be inserted. The base end is attached to the attachment plate 36 in the vicinity of the wire feed rollers 33 and 34 so that the front end faces the core 11.

  The nozzle 32 is a straight rectangular tube shape into which the wire 14 composed of a rectangular wire having a rectangular cross section can be inserted. The nozzle 32 in this embodiment is a wire 14 as shown in the enlarged view of FIG. It is made by fixing a cover plate 32c that closes the concave groove 32a with a screw 32d to a long rod-shaped member 32b in which the concave groove 32a capable of accommodating the groove is formed.

  The nozzle 32 is attached to the attachment plate 36 via an attachment 37, and the nozzle 32 extends in the X-axis direction in a state of being attached to the attachment plate 36, and the wire 14 inserted into the nozzle 32 is the above-described pedestal 43. In this embodiment, the wire 14 is parallel to the central axis of the round closed magnetic path core 11 placed on the center, and is shifted in the Y-axis direction from the central axis. Further, it is fixed in the upper space of the base 20a so as to pass through the vicinity of the outer periphery of the closed-shaped closed magnetic path core 11 (FIGS. 11 and 13).

  As shown in FIGS. 1 and 2, the coil manufacturing apparatus 20 includes a coil forming portion 51 that bends the wire 14 fed from the wire feeding portion 31 through the nozzle that is the wire guide portion 32. In this embodiment, it is assumed that a deformed surface 51 a (FIG. 1) is formed on the coil forming portion 51 to which the wire 14 guided from the nozzle that is the wire guide portion 32 is pressed.

  As shown in detail in FIG. 1, the coil forming portion is a flat plate 51 provided horizontally, and arc-shaped cuts 51b are formed on both sides in the Y-axis direction on the side facing the nozzle 32, and the cuts 51b on both sides thereof are formed. It is assumed that the concave grooves into which the side portions of the flat wire 14 in the wide direction can enter are formed as arcs as the deformed surfaces 51a. The deformed surface 51 a made up of these concave grooves is formed with a radius of curvature corresponding to the outer diameter when the wire 14, which is a flat wire, is bent in the wide direction and wound around the winding side of the core 11.

  As shown in FIGS. 11 and 13, the coil forming portion 51 is formed by pressing the wire 14 fed from the wire feeding portion 31 through the wire guide portion 32 with a deformed surface 51a formed of a concave groove. The wire 14 delivered from the wire feeding unit 31 is changed in the traveling direction to the core 11 side so that the delivered wire 14 is wound around the core 11 while being bent.

  Here, the arc-shaped concave groove 51a is formed so as to draw a spiral with respect to the pair of winding sides 11a and 11b of the core 11 placed on the pedestal 43, and the concave groove which is the deformation surface 51a The curved wire 14 sent out from the wire feeding portion 31 and curved is then wound around the winding sides 11a and 11b of the core 11 in a spiral manner (FIGS. 12 and 14).

  As shown in FIG.1 and FIG.2, the base 20a (FIG. 2) of the manufacturing apparatus 20 is provided with the moving means 52 which moves the coil formation part 51 in a horizontal surface. The forming portion moving means 52 extends in the Y-axis direction to move the coil forming portion 51 in the Y-axis direction, and moves the Y-axis moving actuator 53 together with the coil forming portion 51 in the X-axis direction. An axial movement actuator 54 is provided.

  The X and Y axis moving actuators 53 and 54 have the same structure as the telescopic actuator described above. As shown in FIG. 1, the housing 54d of the X axis moving actuator 54 extends in the X axis direction and is fixed to the base 20a. The housing 53d of the Y-axis moving actuator 53 is attached to the follower 54c so as to extend in the Y-axis direction. The coil forming portion 51 has a Y-axis so that the side where the notch 51b is formed faces the nozzle 32 and the groove 51a is the same as the height in the Z-axis direction of the wire 14 fed from the wire feeding portion 31. The moving actuator 53 is attached to a follower 53 c via a support 55.

  As shown in FIG. 1, on one side in the Y-axis direction of the forming portion moving means 52, a cutting device 56 that cuts the wire 14 fed out from the wire guide portion 32 is provided.

  As shown in FIGS. 1, 5 and 6, the cutting device 56 in this embodiment includes an upper blade 57 for inserting a wedge-shaped cut 14b on the upper surface of the flat wire 14, and a wedge-shaped cut 14b on the lower surface of the flat wire 14. The lower blade 58, the cutting drive 59 for engaging the upper blade 57 and the lower blade 58, and the flat wire 14 is prevented from being cut when the upper blade 57 and the lower blade 58 are engaged. And a stopper 60.

  As shown in FIGS. 5 and 6, the driving device 59 is a fluid pressure cylinder that brings the upper blade 57 and the lower blade 58 into contact with and away from each other depending on whether or not fluid pressure is supplied. These are rod-like members having a square cross section and parallel to each other. On the opposing surfaces of these rod-shaped members, convex strips 57a and 58a having a triangular cross section and an acute end are formed continuously in the longitudinal direction, respectively, and the driving device 59 brings the upper blade 57 and the lower blade 58 close to each other. The upper blade 57 and the lower blade 58 are supported so as to be detachable so that the tips of the ridges 57a and 58a come into contact with each other.

  The stopper 60 is a screw screwed to the upper blade 57. When the upper blade 57 and the lower blade 58 are brought close to each other, the tip of the screw 60 comes into contact with the lower blade 58, and the upper blade 57 and the lower blade 58. Is prevented from approaching further, thereby forming a predetermined gap t (FIG. 6) between the ridges 57a, 58a. When the nut 60b is screwed onto the screw portion 60a of the screw 60 and the tip of the screw 60 comes into contact with the lower blade 58, there is a gap t generated between the ridges 57a and 58a of the upper blade 57 and the lower blade 58. By tightening and fixing the nut 60b to the upper blade 57 in a desired state, the rotation of the screw 60 screwed to the upper blade 57 is prohibited, and the desired gap t generated between the ridges 57a and 58a varies. Configured to prevent things from happening.

  Then, as shown in the enlarged view of FIG. 6, when the stopper 60 made of this screw is brought into close contact with each other with the flat wire 14 inserted between the upper blade 57 and the lower blade 58, Although the notch 14b is made in the flat wire 14 from both sides by the ridges 57a and 58a, the wire 14 due to the contact between the ridges 57a and 58a is prevented from being cut.

  As shown in FIG. 1, the base 20a is provided with a cutting movement means 61 for moving the cutting device 56 in the triaxial direction. The incision moving means 61 is composed of a combination of the X-axis, Y-axis, and Z-axis direction expansion / contraction actuators 62 to 64, and has the same structure as the above-described gripping tool movement means 45, and thus the repeated description is omitted.

  Further, on the other side in the Y-axis direction of the forming portion moving means 52, there is provided an extra wire tip portion gripping / drawing device 70 that grips and pulls out the extra length tip portion 14a of the wire 14 wound around the core 11.

  The extra wire tip gripping / drawing device 70 includes a grip portion 71 that grips the extra length tip portion 14 a (FIG. 15) of the wire 14 wound around the core 11, and an extra length of the wire 14 gripped by the grip portion 71. And a wire drawing portion 72 for drawing the tip portion 14a.

  As shown in FIGS. 7 and 8, the gripping portion 71 is a fluid pressure cylinder that makes the pair of gripping pieces 71a and 71b contact and separate depending on whether or not the fluid pressure is supplied, and makes the pair of gripping pieces 71a and 71b approach each other. And it is comprised so that the wire 14 which exists between those front-end | tips can be hold | gripped.

  As shown in FIG. 1, the wire drawing portion 72 moves the grip portion 71 in the triaxial direction, and is configured by a combination of X-axis, Y-axis, and Z-axis direction expansion / contraction actuators 73 to 75. . Since the wire drawing portion 72 has the same structure as the gripper moving means 45 described above, repeated description is omitted.

  The wire lead-out portion 72 can pull out the surplus length tip portion 14a gripped by the grip portion 71 by moving the grip portion 71 gripping the surplus length tip portion 14a of the wire 14 away from the core 11. As a result, the wire lead-out portion 72 is arranged so that the above-described wire rod drawing-out portion 31 can pull out the extra length tip portion 14a in synchronism while feeding the wire 14.

  Next, the coil manufacturing method of the present invention for manufacturing a coil using such a coil manufacturing apparatus will be described.

  The coil manufacturing method of the present invention includes a wire winding step of winding the wire 14 around the core 11 while spirally turning the extra length tip portion 14a of the wire 14 fed out from the wire rod feeding portion 31; It has a tip part drawing process which pulls out the surplus length tip part 14a synchronously, grasping the extra length tip part 14a of wire 14 after rotation, and feeding out the wire 14 from the wire rod operation part 31.

  As shown in FIG. 17, the core 11 in this embodiment includes a pair of parallel winding sides 11a and 11b around which the wire 14 is wound, and both ends of the pair of winding sides 11a and 11b. A round-shaped closed magnetic path core 11 having coupling sides 11c and 11d to be coupled, wound around the round-shaped closed magnetic path core 11 and a pair of winding sides 11a and 11b of the round-shaped closed magnetic path core 11, respectively. It is assumed that the coil 12 made of the turned wire 14 is manufactured.

  As shown in FIGS. 11 and 13, in the wire winding step, the wire 14 is fed out from the direction intersecting the pair of winding sides 11 a and 11 b of the square closed magnetic path core 11 and the pair thereof. The wire 14 is wound around the winding sides 11a and 11b. For this reason, the wire winding process includes a first wire winding process for winding the wire 14 around one winding side 11a and a second wire winding process for winding the wire 14 around the other winding side 11b. Shall be included.

  The wire 14 wound around the pair of winding sides 11a and 11b is a flat wire, and the short side of the flat wire 14 becomes the inner diameter surface in each of the first and second wire winding processes. A case where the flat wire is wound around the pair of winding sides 11a and 11b of the core 11 by edgewise winding is shown.

  On the other hand, in this embodiment, before the first and second wire rod winding steps, a wire rod feeding step of feeding the flat wire 14 to the end of cutting and a wedge-shaped cut 14b on the upper surface and the lower surface of the flat wire 14 simultaneously. A cutting process in which the core 11 is moved after the wire rod winding process or the tip end drawing process to cut the rectangular wire 14 at the cut 14b is performed. Each process shall be performed.

  When the coil 12 is manufactured, as shown in FIG. 3, the pair of winding sides 11a and 11b of the rectangular closed magnetic path core 11 are set in the Z-axis direction, and the upper horizontal connecting piece 11c for connecting them is formed. Both ends are gripped by a pair of sandwiching pieces 44 a and 44 b in the gripping tool 44, and the gripping tool 44 is put on standby in the standby position together with the core 11. From this state, it is assumed that the method for manufacturing a coil in the present invention is started, and each step in the manufacturing method of the present invention will be described in detail below.

<First wire operation process>
In this step, as shown by the solid line arrow in FIG. 9, the flat wire 14 is fed to the end of winding and cutting position. The wire rod 14 is fed out by the wire rod feeding unit 31 shown in FIG. 2, and the upper roller 34 sandwiching the wire rod 14 together with the lower roller 33 is driven to rotate by driving the feed servo motor 41, and the upper and lower wire rod feed rollers 33. , 34 are sequentially fed out. The feeding length of the wire 14 is a length wound around one winding side 11a of the core 11, and this length is obtained in advance by the outer diameter of the winding side 11a and the number of times of winding.

<First inclusive process>
In this step, wedge-shaped cuts 14b are made simultaneously on the upper and lower surfaces of the drawn flat wire 14 in the vicinity of the nozzle 32. This incision 14b is made by the incision device 56, the drive device 59 is moved by the incision moving means 61 shown in FIG. 1, and the rectangular wire 14 in the vicinity of the nozzle 32 is inserted between the upper blade 57 and the lower blade 58, As shown in FIG. 5 and FIG. 6, in this state, the driving device 59 is driven to bring both the upper blade 57 and the lower blade 58 into close contact. This meshing is performed until the tip of a screw 60 that is a stopper screwed into the upper blade 57 comes into contact with the lower blade 58. As shown in the enlarged view of FIG. The notch 14b is made in the flat wire 14 from both sides by the ridges 57a and 58a.

  After the cuts 14b are made in the upper surface and the lower surface in the vicinity of the nozzle 32 of the flat wire 14 to such an extent that the wire 14 is not cut in this way, the driving device 59 is driven again to separate the upper blade 57 and the lower blade 58 from each other. In a state where the meshing is canceled, the driving device 59 is moved again to the standby position by the cutting movement means 61.

<First pullback process>
In this step, as shown by the broken line arrow in FIG. 9, the rectangular wire 14 with the cut 14b is pulled back. The wire rod 14 is pulled back by the wire rod feeding portion 31 shown in FIG. 2, and the upper roller 34 sandwiching the wire rod 14 together with the lower roller 33 is driven to rotate in the reverse direction by driving the servomotor 41 for feeding. The wire 14 sandwiched between the wire feed rollers 33 and 34 is pulled back to the nozzle 32 side which is the wire guide part 32. The pull-back length of the wire 14 is equal to the length drawn out in the previous wire-feeding step. If the wire 14 is drawn again, the wire 14 is wound around one winding side 11a in the core 11 and the cut 14b is completed. Is a length that is located near the tip of the nozzle 32 or protrudes from the tip edge.

<First wire winding process>
In this step, the wire 14 is wound around one winding side 11 a of the core 11 while the extra length tip portion 14 a of the wire 14 fed out from the wire feeding portion 31 is spirally turned.

  For this reason, as shown in FIG. 12A, the core 11 in the standby position while being held by the holding tool 44 is moved together with the holding tool 44, so that the connection that is the bottom surface of the square closed magnetic path core 11 is connected. The bottom surface of the connecting piece 11d is seated on the upper surface of the base body 43a in a state where the side surface of the wire rod operating portion 31 on the side 11d is in contact with the ridge 43c.

  In this embodiment, since a case where winding is applied to the pair of winding sides 11a and 11b of the core 11 is shown, the wire winding step is performed on each side of the pair of winding sides 11a and 11b. In this first wire rod winding process, the wire rod 14 is wound around one of the winding sides 11a. As shown in FIG. 11 (a), the wire rod 14 fed straight out from the nozzle 32 is one of them. The rectangular closed magnetic path core 11 is seated on the upper surface of the base body 43a so as to pass near the outside of the winding side 11a. Then, the wire 14 is fed out, and when the wire 14 passes near the outside of one winding side 11a, the feeding is temporarily stopped.

  In this state, the coil forming portion 51 is moved by the forming portion moving means 52, and as shown in FIGS. 11 (b) and 12 (b), the one deformed surface 51a is placed outside the one winding side 11a. The wire 14 that has passed through the vicinity is pressed from the side to bend the wire 14 toward the one winding side 11a, and the deformed surface 51a is on the extension line of the nozzle 32, and the wire 14 is fed out. Move to a position where

  As a result, the wire 14 that has been fed out and has passed through the vicinity of the outer periphery of the closed L-shaped magnetic path core 11 is bent toward the center of the closed L-shaped closed magnetic path core 11. The portion becomes the extra length tip portion 14a.

  Here, in the winding of the core 11 around one winding side 11a, the winding to the other winding side 11b has not been formed yet, so the length L1 ( If FIG. 12) is smaller than the gap D between the pair of winding sides 11a and 11b, the extra length tip portion 14a can be spirally moved around one of the winding sides 11a, and a relatively long extra length tip. It can be set as the part 14a.

  Therefore, the feeding of the wire 14 by the wire feeding unit 31 is resumed from the state shown in FIGS. 11 (b) and 12 (b). That is, the feeding servo motor 41 in the wire rod operation unit 31 shown in FIG. 2 is driven again to rotate the upper roller 34, and the wire 14 sandwiched between the upper and lower rollers 33, 34 is sequentially fed out.

  At this time, when the force for lowering the slider 38a by the wire rod feeding actuator 38 is not sufficient and the force between the upper roller 34 and the lower roller 33 sandwiching the wire rod 14 is insufficient, the bolt 40a screwed to the auxiliary plate 40 is used. The upper roller 34 and the lower roller 33 can increase the force with which the wire 14 is sandwiched by pressing the lower end against the upper edge of the support plate 39.

  The wire 14, which is continuously fed straight out from the nozzle 32, which is a wire guide, near the outer periphery of the rectangular closed magnetic path core 11, passes through the vicinity of the outer periphery of the rectangular closed magnetic path core 11, and The deformed surface 51a is guided toward the center of the square closed magnetic path core 11 and is sequentially curved along the cross-sectional shape of one winding side 11a of the core 11.

  The wire 14 that is sequentially bent toward the center of the closed-shaped magnetic path core 11 by the deformed surface 51 a of the coil forming portion 51 is then always inserted into the central hole 13 c of the closed-shaped closed magnetic path core 11. Here, since the deformation surface 51a of the coil forming portion 51 is formed so as to draw a spiral with respect to the one winding side 11a of the core 11, it is guided by the deformation surface 51a of the coil forming portion 51 and is formed in a rectangular shape. The end portion of the wire 14 inserted into the central hole 13 c of the closed magnetic path core 11 is spirally wound around one winding side 11 a of the core 11.

  Thereby, it is avoided that the wire 14 wound around one winding side 11a of the square closed magnetic path core 11 interferes with the straight wire 14 fed out by the wire feeding portion 31. The long tip portion 14 a is spirally guided to one winding side 11 a of the square closed magnetic path core 11.

  That is, the continuously drawn wire 14 passes through the vicinity of the outer periphery of the square closed magnetic path core 11, and then sequentially curves toward the center of the square closed magnetic path core 11 by the deformation surface 51 a of the coil forming portion 51. , And passes through the central hole 11e between the pair of winding sides 11a and 11b of the square closed magnetic path core 11. Then, the wire 14 that is curved and passes through the central hole 11e, as shown in FIG. 11 (c) and FIG. 12 (c), spirals around, and the wire 14 is a closed-shaped closed magnetic circuit core. 11 is wound around one winding side 11a. When the wire 14 is spirally wound around the one winding side 11a and the wire 14 wound around the one winding side 11a is wound a predetermined number of times as shown in FIG. Thus, the cut 14b made by the cutting process is located near the tip of the nozzle 32 or protrudes from the nozzle 32. In this state, the feeding of the wire 14 is stopped and the first wire winding process is performed. Terminate.

<First cutting step>
After completing the winding process on one winding side 11a, the coil forming portion 51 is moved by the forming portion moving means 52 and returned to the standby position. As shown in FIG. It moves so that it may move away from the nozzle 32 by a moving means, and the notch | incision 14b made | formed by the notch | incision process protrudes from the nozzle 32. FIG.

  Here, when the core 11 is moved away from the nozzle 32 and the cut 14 b is protruded from the nozzle 32, the wire rod 14 is fed out by the same amount by the wire rod feeding portion 31. In this way, by increasing the length from the core 11 to the notch 14b, it is possible to sufficiently secure the length in the linear portion of the winding end portion 14c of the wire rod 14, and using that portion as a terminal, It can be used as it is.

  After projecting the cut 14b from the nozzle 32, the core 11 is further moved in the width direction of the wire 14 in that state. Then, since the notch 14b protrudes from the tip of the nozzle 32 which is the wire guide part 32 and is located between the nozzle 32 and the core 11, the wire 14 made of the flat wire 14 is moved by the movement of the core 11 in the width direction of the wire 14. , And is cut by a notch 14b formed between the nozzle 32 and the core 11. Thus, the winding on one winding side 11a is completed.

<Second wire rod feeding step, second cutting step, second pullback step>
In these steps, the flat wire 14 wound around the other winding side 11b of the core 11 is fed from the nozzle 32 which is a wire guide portion up to the winding end cutting position, and is applied to the upper and lower surfaces of the winding end scheduled position. At the same time, a wedge-shaped cut 14b is made, and the rectangular wire 14 with the cut 14b is pulled back. Since the details of these steps are the same as those of the first wire rod operation step, the first insertion step and the first pulling step described above, repeated description will be omitted.

  However, the feeding length of the wire 14 is the length wound around the other winding side 11b of the core 11, and this length is obtained in advance by the outer diameter of the winding side 11b and the number of times of winding. It is done. And the pull-back length of the wire 14 is equal to the length drawn out in this second wire operation step, and when it is drawn out again, the winding of the wire 14 around the other winding side 11b in the core 11 is completed. The notch 14b is positioned in the vicinity of the tip edge of the nozzle 32 or has a length protruding from the tip edge.

<Second wire winding process>
In this step, the wire 14 is wound around the other winding side 11b of the core 11 while the extra length tip portion 14a of the wire 14 fed out from the wire feeding portion 31 is spirally turned.

  For this reason, in the previous first wire winding step, the wire 11 is already wound around one winding side 11a and the core 11 gripped by the gripping tool 44 is moved together with the gripping tool 44, and FIG. ) And FIG. 14 (a), positioning in the Y-axis direction is performed so that the wire 14 drawn straight from the nozzle 32 passes near the outside of the other winding side 11b, and the wire of the connecting piece 11d. Positioning in the X-axis direction is performed by bringing the side surface of the operating portion 31 into contact with the ridge 43c. In this state, the bottom surface of the connecting piece 11d of the square closed magnetic path core 11 is seated on the top surface of the base body 43a. Then, the wire 14 is fed out, and when the wire 14 passes near the outside of the other winding side 11b, the feeding is temporarily stopped.

  Next, in this state, the coil forming portion 51 is moved by the forming portion moving means 52, and the other deformed surface 51a is moved to the other winding side as shown in FIGS. 13 (b) and 14 (b). The wire 14 that has passed through the vicinity of the outer side of 11b is pressed from the side to bend the wire 14 toward the winding side 11b, and the deformed surface 51a is on the extension line of the nozzle 32, and the wire 14 is fed out. Move to a position where

  As a result, the wire 14 that has been drawn out and has passed through the vicinity of the outer periphery of the closed letter-shaped magnetic path core 11 is bent toward the central hole 11e of the closed letter-shaped magnetic path core 11, and is located on the tip side from the bent portion. The straight line portion becomes the extra length tip portion 14a.

  Here, in the winding of the core 11 to the other winding side 11b, as shown in FIG. 14B, the winding to the one winding side 11a has already been completed. Since the length L2 (FIG. 14) of the surplus length tip portion 14a is set so as not to interfere with the wire 14 wound around one winding side 11a, the length L2 of the surplus length tip portion 14a is increased. I can't do that.

  From the state shown in FIG. 13B and FIG. 14B, the feeding of the wire 14 by the wire feeding portion 31 is resumed. That is, the feeding servo motor 41 in the wire rod feeding unit 31 (FIG. 2) is driven again to rotate the upper roller 34, and the wire rod 14 sandwiched between the upper and lower rollers 33, 34 is sequentially fed out.

  The wire 14 that is continuously drawn straight out in the vicinity of the outer periphery of the round-shaped closed magnetic path core 11 is guided toward the center of the round-shaped closed magnetic path core 11 by the deformation surface 51a of the coil forming portion 51, and the core It will bend | curved sequentially so that the cross-sectional shape in 11 winding sides may be met.

  The wire 14 that has been drawn out and that is sequentially bent toward the center of the letter-shaped closed magnetic path core 11 by the deformation surface 51 a of the coil forming portion 51 is then always inserted into the central hole 11 e of the letter-shaped closed magnetic path core 11. . Here, since the deformation surface 51a of the coil forming portion 51 is formed so as to draw a spiral with respect to the winding side of the core 11, it is guided by the deformation surface 51a of the coil forming portion 51 and is closed in a rectangular shape. The extra length tip portion 14 a of the wire 14 inserted through the central hole 11 e of the core 11 is spirally wound around the other winding side 11 b of the core 11.

  Thereby, it is avoided that the wire 14 wound around the winding side of the rectangular closed magnetic path core 11 interferes with the straight wire 14 fed out by the wire feeding portion 31, and the end of the wire 14 is It is guided in a spiral manner to the other winding side 11 b of the letter-shaped closed magnetic path core 11.

  That is, the continuously drawn wire 14 passes through the vicinity of the outer periphery of the square closed magnetic path core 11, and then sequentially curves toward the center of the square closed magnetic path core 11 by the deformation surface 51 a of the coil forming portion 51. , And passes through the central hole 11e of the closed L-shaped magnetic path core 11. And the wire 14 which curves and passes the center hole 11e will circulate spirally as shown in FIG.13 (c) and FIG.14 (c), and the wire 14 is a square closed magnetic circuit core. 11 is wound around the other winding side 11b. Then, the feeding of the wire 14 is stopped in a state where the wire 14 is wound a predetermined number of times around the other winding side 11b, and this second wire winding step is terminated.

<Lead end drawing process>
In this step, the extra length tip portion 14a of the wire 14 after being wound around the other winding side 11b is gripped, and the extra length tip portion is synchronized with feeding the wire rod 14 from the nozzle 31 which is the wire rod feeding portion. Pull out 14a. The extra length tip portion 14a is pulled out by the extra length tip portion gripping / drawing device 70 shown in FIG.

  Specifically, the gripping portion 71 in the standby position is moved in the triaxial direction by the wire drawing portion 72, and as shown in FIGS. 7 and 8, between the pair of gripping pieces 71a and 71b separated from each other. The extra length tip part 14a is made to enter. Thereafter, the pair of gripping pieces 71a and 71b are brought close to each other, and the extra length tip portion 14a is sandwiched therebetween.

  As shown in FIG. 15A, the wire drawing portion 72 includes a grip portion 71 that holds the extra length tip portion 14a of the wire 14, and the wire drawing portion 72 is a core as shown in FIG. Move away from 11. Thereby, the extra length tip portion 14a of the wire 14 gripped by the grip portion 71 can be pulled out. At this time, the wire lead-out portion 72 shown in FIG. Then, the extra length tip portion 14a is pulled out.

  That is, the drawing of the extra length tip portion 14 a and the feeding of the wire 14 by the wire feeding portion 31 are performed by the drawing speed of the wire 14 by the wire feeding portion 31 and the extra length tip portion 14 a by the extra length tip gripping and drawing device 70. The speed is made the same, and the feeding amount of the wire 14 from the nozzle 32 and the drawing amount by the extra length tip portion gripping and drawing device 70 are made to coincide with each other.

  Then, as shown in FIG. 15B, after the extra length tip portion 14a is pulled out to a desired length, the notch 14b inserted by the notch process is located near the tip of the nozzle 32 or the tip of the nozzle 32. Will protrude from. In this state, the drawing of the extra-length tip portion 14a is stopped.

  After the surplus length tip portion 14a is pulled out to a desired length, the pair of gripping pieces 71a and 71b gripping the surplus length tip portion 14a in the gripping portion 71 are separated from each other to eliminate the gripping. The wire drawing portion 72 moves the holding portion 71 from which the holding of the tip portion 14a has been released to the standby position, thereby terminating the tip portion drawing step.

<Second cutting step>
After the extra length tip portion 14a of the wire 14 wound around the other winding side 11b is pulled out by a predetermined length, the coil forming portion 51 is moved by the forming portion moving means 52 and returned to the standby position. The core 11 is moved by the core moving means in the wire rod feeding direction of the nozzle 32, and the cut 14 b made by the cutting process is projected from the nozzle 32.

  When the core 11 is moved away from the nozzle 32 and the cut 14b is projected from the nozzle 32, the wire rod 14 is fed out by the same amount by the wire rod feeding portion 31. In this way, by increasing the length from the core 11 to the notch 14b, it is possible to sufficiently secure the length in the linear portion of the wire 14 at the end of the winding, and using that portion as a terminal, It can be used as it is.

  As shown in FIG. 16, after the cut 14 b is protruded from the nozzle 32, the core 11 is further moved in the width direction of the wire 14. If the notch 14b is projected from the tip of the nozzle 32 which is the wire guide part 32, the notch 14b is located between the nozzle 32 and the core 11, so that the flat angle is obtained by the movement of the core 11 in the width direction of the wire 14. The wire 14 composed of the wire 14 is cut by a cut 14 b formed between the nozzle 32 and the core 11. As a result, the winding on the other winding side 11b is completed.

  As a result, the coil 12 shown in FIG. 17 is obtained, which is composed of the square closed magnetic path core 11 and the wire 14 wound spirally around the pair of winding sides 11a and 11b.

  Here, as shown in FIG. 16, by increasing the length from the core 11 to the notch 14b, it is possible to sufficiently secure the length in the linear portion of the winding end portion 14c of the wire rod 14, The part can be used as it is as a terminal.

  Therefore, in the coil manufacturing apparatus 20 and the manufacturing method thereof according to the present invention, the wire 14 that has been drawn out and has passed through the vicinity of the outer periphery of the closed-shaped closed magnetic path core 11 is sequentially bent, and thereby the wire 14 that circulates spirally is reduced. It can be wound directly around the letter-shaped closed magnetic path core 11.

  However, in the wire winding step, the wire 14 that has been fed from the wire feeding portion 31 and passed through the vicinity of the outer periphery of the core 11 is sequentially bent by the coil forming portion 51, and the wire 14 that turns spirally is wound around the core 11. Therefore, it is not possible to form the tip portion 14a having a relatively long extra length as in the conventional case.

  However, in the coil manufacturing apparatus and the manufacturing method thereof according to the present invention, the gripping part 71 and the wire drawing part 72 are provided, and the extra length leading end part 14a is pulled out in the leading end part drawing process. Can be formed. And in the front-end | tip part drawing-out process, since the extra length front-end | tip part 14a is pulled out synchronizing with drawing | feeding out the wire 14 from the wire operation part 31, the number of the windings formed in the core 11 of the wire 14, and the wound wire 14 Thus, the tip end portion of the wire 14 wound around the core 11 can be set to a length exceeding the inner diameter of the core 11 without changing the outer diameter of the coil.

  In the above-described embodiment, although the wire rod feeding unit 33 is provided with four pairs of wire rod feed rollers 33 and 34 for feeding the wire rod 14 and the upper roller 34 is rotated by the feed servo motor 41, the wire rod feeding unit 31 has been described. The wire feed rollers 33 and 34 are not limited to four pairs, but may be one pair or two pairs, or may be three pairs, five pairs, six pairs, or seven pairs or more. The feed servo motor 41 may be configured to rotate the lower roller 33 instead of the upper roller 34, and the feed servo motor 41 is configured to rotate both the upper roller 34 and the lower roller 33. You may do it.

  Further, in the above-described embodiment, the core 11 is the square closed magnetic circuit core 11, and the wire winding process is performed on the pair of winding sides 11a and 11b, respectively, but the leading end drawing process is performed on the other winding side. The case where it performed only with respect to the wire 14 wound around the wire side 11b was demonstrated. However, when the core 11 is the square closed magnetic path core 11, the leading end drawing step may be performed on the wire 14 wound around both the pair of winding sides 11a and 11b.

11 B-shaped closed magnetic circuit core (core)
11b cutting 14 flat wire (wire)
14a Extra length tip portion 20 Coil manufacturing device 31 Wire rod feeding portion 32 Wire rod guide portion 43 Place 44 Holding tool 45 Holding tool moving means 51 Coil forming portion 51a Deformation surface 56 Cutting device 57 Upper blade 58 Lower blade 59 Driving device 60 Stopper 71 Grip part 72 Wire drawing part

Claims (5)

A pedestal (43) on which the bottom of the B-shaped closed magnetic path core (11) is seated;
A gripping tool (44) for gripping the upper portion of the square closed magnetic path core (11),
Gripping tool moving means (45) capable of moving the gripping tool (44) so as to press the square closed magnetic path core (11) gripped by the gripping tool (44) against the table (43);
A wire rod feeding portion (31) for feeding the wire rod (14);
A wire rod guiding portion (32) for guiding the wire rod (14) delivered from the wire rod feeding portion (31) to the square closed magnetic path core (11);
The B-shaped closed magnetic path core (11) coil forming portion for winding the wire to be unwound (14) the hollow square shaped closed magnetic circuit core is curved (11) so as to pass through the outer periphery (51) When,
A gripping part (71) for gripping the extra length tip part (14a) of the wire rod (14) wound around the square closed magnetic path core (11) ;
A wire rod drawing portion (72) for pulling out the extra length tip portion (14a) gripped by the grip portion (71),
The wire guide part (32) is configured to guide the wire (14) in a direction intersecting one side of the square closed magnetic path core (11),
The coil forming part (51) is formed with a deformed surface (51a) on which the wire (14) guided by the wire guide (32) is pressed,
The coil forming part (51) changes the traveling direction of the wire (14) sent out by pressing the wire (14) with the deformed surface (51a) to the core (11) side to change the wire ( 14) curving and
The wire rod drawing portion (72) is arranged so that the wire rod feeding portion (31) can pull out the extra length tip portion (14a) synchronously while feeding the wire rod (14). A coil manufacturing apparatus. The wire is a flat wire (14),
The coil according to claim 1, wherein the coil forming portion (51) for winding the flat wire (14) around the core (11) is curved so that a short side of the flat wire (14) becomes an inner diameter surface. Manufacturing equipment. A cutting device (56) for making a cut (14b) in the wire rod (14) fed out from the wire rod guide portion (32),
The cutting device (56)
An upper blade (57) for making a wedge-shaped cut (14b) on the upper surface of the flat wire (14);
A lower blade (58) for making a wedge-shaped cut (14b) on the lower surface of the flat wire (14);
A driving device (59) for engaging the upper blade (57) and the lower blade (58);
A stopper (60) for preventing the flat wire (14) from being cut when the flat wire (14) is engaged with the upper blade (57) and the lower blade (58). The coil manufacturing apparatus according to claim 2 . A wire rod feeding step of feeding a flat wire (14) drawn from the wire rod feeding portion (31) to the winding end cutting position;
A cutting step of simultaneously making a wedge-shaped cut (14b) on the upper and lower surfaces of the flat wire (14);
A pulling back step of pulling back the flat wire (14) with the cut (14b);
Short side inner surface of the rectangular wire (14) while surplus length distal portion (14a) to pivot helically core (11) of the flat wire that Repetitive out from the wire Feeding unit (31) (14) Wire rod winding step of winding the flat wire (14) to the core (11) by edgewise winding so that
The surplus length tip (14a) to grip the wire Feeding unit (31) from said flat the rectangular wire (14) in synchronism with feeding surplus length tip of the flat wire after winding (14) (14a ) and a distal end drawer step to draw,
And a cutting step of moving the core (11) and cutting the rectangular wire (14) with the cut (14b) . The core is a square closed magnetic circuit core (11),
The rectangular wire on one side of said the direction intersecting out Repetitive flat wire (14) B-shaped closed magnetic path core (11) against one side of the hollow square shaped closed magnetic path core in the wire winding step (11) The method of manufacturing a coil according to claim 4 , wherein (14) is wound.

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