JP5930528B2 - Coil manufacturing apparatus and method - Google Patents

Description

  The present invention relates to a coil manufacturing apparatus and a manufacturing method therefor, in which a choke coil is obtained by winding a wire rod of a predetermined length around a pair of coil bobbins.

  Conventionally, a coil bobbin constituting a choke coil or the like is configured such that an iron core combined with a coil bobbin is spatially fixed, and the coil bobbin is rotationally driven by a drive gear that meshes with a gear formed on the outer periphery of the coil bobbin. After the wire rod is hooked on the locking portion of the coil bobbin by the winding nozzle, the coil bobbin is rotated as it is by the drive gear to perform winding. And when a wire rod is wound around a single coil bobbin, a manufacturing apparatus and method that can automatically perform winding up to the end of the winding wire end have been proposed (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 6-96978

  However, in the above-described conventional manufacturing apparatus, although a wire rod is wound around a single coil bobbin, some choke coils in which a wire rod is wound around a coil bobbin include a wire rod wound around a pair of coil bobbins. . In order to form a choke coil by winding a wire around such a pair of coil bobbins, it is necessary to wind a wire of a predetermined length around the pair of coil bobbins from both sides. There has been no manufacturing apparatus that can be used in the past.

  An object of the present invention is to provide a coil manufacturing apparatus and a manufacturing method thereof capable of winding a wire having a predetermined length around a pair of coil bobbins from both sides.

  The coil manufacturing apparatus of the present invention is an apparatus for winding a wire rod of a predetermined length from both sides around a pair of coil bobbins in which a locking portion capable of locking an end portion of a wire rod is formed, and is drawn out from a wire feeding pulley. A nipper clamp mechanism for supporting and cutting the drawn wire, a clamp moving mechanism for moving the nipper clamp mechanism, a nozzle capable of holding the end of the drawn wire, and a wire held by the nozzle by moving the nozzle A nozzle moving mechanism for locking the ends of the coil bobbins to the locking portions of the pair of coil bobbins, a drawing mechanism for pulling out the wire rod with the ends locked to the locking portions from the pulley, and holding and rotating the pair of coil bobbins A bobbin holding and rotating mechanism for winding a wire rod having a predetermined length drawn and cut around a pair of coil bobbins from both sides;

  In this case, a wire guide for guiding the wire to the pair of coil bobbins with the drawn wire interposed therebetween may be provided, and the pair of coil bobbins held by the bobbin holding and rotating mechanism are moved by moving the bobbin holding and rotating mechanism in an arc shape. Possible bobbin movement mechanisms can also be provided. The nipper clamp mechanism includes first and second clamp mechanisms that releasably support the wire fed from the wire feeding pulley, and the nozzle is supported by the first and second clamp mechanisms, respectively. It is preferable that the wire rod between the mechanisms is held.

  On the other hand, the coil manufacturing method of the present invention is a method of winding a wire of a predetermined length around a pair of coil bobbins from both sides, and one end of the wire fed through a wire feed pulley is connected to one coil bobbin. A wire one end locking step for locking to the locking portion, a wire drawing step for drawing the wire from the wire drawing pulley for a predetermined length, a wire cutting step for cutting the drawn wire on the wire drawing pulley side, and the drawn wire A wire rod other end portion locking step of locking the other end portion formed by cutting the wire rod to the locking portion of the other coil bobbin, and a wire rod drawn by rotating both one coil bobbin and the other coil bobbin simultaneously. A winding step of winding the coil bobbin from both sides around both the one coil bobbin and the other coil bobbin.

  In this winding step, the wire rod sandwiching both ends of the drawn wire rod can be reciprocated in the axial direction of the pair of coil bobbins along with the rotation of the pair of coil bobbins, and the wire rod can be wound around each of the pair of coil bobbins. preferable. Also, in the wire rod one end locking step, one end portion of the wire rod is locked from below to the locking portion of one coil bobbin, and a pair of coil bobbins are circled between the wire rod one end locking step and the wire rod other end locking step. It is preferable that a bobbin moving step for moving in an arc shape is provided, and the other end portion of the wire rod is locked from above to the locking portion of the other coil bobbin in the wire rod other end portion locking step.

  In addition, it is preferable that the end of the wire rod is locked to the locking portion by moving a nozzle that holds the end of the wire rod, and the nozzle has split pieces on the left and right that are divided along the axial direction. It is further preferable that the wire is inserted between the divided pieces, and then the left and right divided pieces are combined and the wire is held by the nozzle.

  In the coil manufacturing apparatus and the manufacturing method thereof according to the present invention, a pair of coil bobbins are held and rotated, and a wire having a predetermined length that is drawn and cut is wound from both sides onto the pair of coil bobbins. A wire having a predetermined length can be wound around a pair of coil bobbins from both sides.

It is a top view which shows the manufacturing apparatus of the coil of embodiment of this invention. It is the perspective view of the one side which comprises the symmetrical structure of the manufacturing apparatus of the coil. It is the front view seen from the AA line of FIG. 1 which shows the manufacturing apparatus of the coil. It is a side view which shows the bobbin holding | grip rotation mechanism. It is the front view seen from the BB line of FIG. 1 which shows the manufacturing apparatus of the coil. It is a front view which shows the nozzle. It is the side view which looked at the nozzle from CC line of FIG. It is the top view which looked at the nozzle from the DD line of FIG. It is a perspective view which shows the attachment state of the delivery pulley. It is a disassembled perspective view which shows the relationship between a pair of coil bobbin and an iron core. It is a perspective view which shows the state with which the pair of coil bobbin was assembled | attached to the iron core. It is a perspective view which shows the state which bends the one end part of the wire which the nozzle hold | gripped. It is a side view corresponding to FIG. 7 which shows the state which makes the one end part of the bent wire rod protrude upwards from a nozzle. It is a perspective view which shows the state which latches the one end part of the bent wire to one coil bobbin. FIG. 15 is a perspective view corresponding to FIG. 14 showing a state in which one coil bobbin with one end of the wire rod locked is rotated and wound once. It is a perspective view which shows the state which turned the wire rod around the latching roller so that the upper and lower surfaces of the pair of coil bobbins were reversed. FIG. 7 is a front view corresponding to FIG. 6 illustrating a state in which the wire is cut after the locking roller is raised and the wire is pulled out. It is a side view corresponding to FIG. 7 which shows the state which makes the other end part of the wire obtained by the cutting | disconnection and bend | folded below from a nozzle. It is a perspective view which shows the state which latches the other end part of the bent wire to the other coil bobbin. FIG. 15 is a perspective view corresponding to FIG. 14 illustrating a state in which the other coil bobbin with the other end of the wire rod engaged is rotated and wound once. It is a perspective view which shows the state wound by pinching the both ends of the wire with a wire guide. It is a perspective view which shows the state by which the wire is wound around both of a pair of coil bobbins.

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

  The coil manufacturing apparatus of the present invention winds a wire 11 (FIGS. 3, 6 and 9) having a predetermined length around a pair of coil bobbins from both sides thereof. As shown in FIGS. 10 and 11, the pair of coil bobbins 12, 12 each have a cylindrical shape of the same shape and the same size, and the outer periphery of each coil bobbin 12 is externally connected to the coil bobbin 12 at the central portion in the axial direction. A gear 12a for further rotational driving is formed. The winding grooves 12b and 12c for winding the wire 11 are formed on both sides in the axial direction across the gear 12a, and the locking portions 12d and 12e for hooking the ends of the wire 11 and the locking portions 12d and 12e. The storage grooves 12f and 12g for storing the ends of the wire 11 hooked on are formed at both ends in the axial direction. The coil bobbin 12 is divided along the axial direction, and as shown in FIG. 10, the coil bobbin 12 is assembled in a state in which the legs 13 a and 13 b on both sides of the iron core 13 forming a square shape are sandwiched. The iron core 13 is formed so as to form a square shape by connecting the pair of legs 13a and 13b at both ends by connecting portions 13c and 13d.

  A coil manufacturing apparatus 20 according to the present invention is shown in FIGS. Here, three axes X, Y, and Z orthogonal to each other are set, the X axis extends in a substantially horizontal front-rear direction, the Y axis extends in a substantially horizontal lateral direction, and the Z axis extends in a substantially vertical direction. The structure of will be described.

  As shown in FIG. 1, the coil manufacturing apparatus 20 of the present invention includes a bobbin holding and rotating mechanism 21 that holds a pair of coil bobbins 12 and 12 and rotates the pair of coil bobbins 12 and 12 separately. As shown in detail in FIGS. 2 and 3, the bobbin holding and rotating mechanism 21 has a base plate 22 erected on the horizontal base 20 a so as to extend in the Y-axis direction. A large-diameter semicircular cutout 22a is formed on one side of the upper portion in the Y-axis direction. A rail 23 is formed in an arc shape along the semicircular cutout 22a on the base plate 22, and an arcuate gear 24 (see FIG. 3) is further provided along the rail 23 on the radially outer side of the rail 23. ) Is installed. A movable base 26 is supported on the rail 23 so as to be movable in an arc along the rail 23.

  As shown in FIG. 4, the movable base 26 constituting the bobbin holding and rotating mechanism 21 is provided with a mounting piece on the center side of the arc-shaped notch 22 a with a predetermined distance in the X-axis direction from the movable base 26. 27 is provided via a boss 27a. The mounting piece 27 is provided on the movable base 26 so that the edge facing the center of the notch 22a of the mounting piece 27 is substantially flush with the edge facing the center of the notch 22a of the movable base 26. The predetermined interval between the movable base 26 and the mounting piece 27 is an interval at which the coil bobbin 12 can enter, and the connecting portions 13c and 13d of the iron core 13 protruding from both ends of the coil bobbin 12 face the center side of the notch 22a. The movable base 26 and the mounting piece 27 are configured to be able to be placed on the same edge. And the fixing tool 28 which fixes the connection parts 13c and 13d in the state in which the connection parts 13c and 13d of the iron core 13 were mounted in the edge which faces the center of the notch 22a of this movable stand 26 and the attachment piece 27 is provided. Mounted on its edge. In the figure, a case where the fixture 28 is attached by a machine screw 29 is shown. The pair of coil bobbins 12 and 12 are configured to be attachable to the movable base 26 via the iron core 13 by the fixture 28.

  As shown in FIGS. 3 and 4, the movable base 26 is provided with a pair of drive gears 31 that mesh with a gear 12 a (FIG. 4) formed on the outer periphery of the pair of coil bobbins 12 and 12. The center of the drive gear 31 is fixed to one end of a rotating shaft 31 a pivotally supported by the movable table 26, and the first bevel gear 32 is disposed at the other end of the rotating shaft 31 a provided through the movable table 26. Is installed. A pair of bobbin rotation motors 33, 33 are arranged on the movable base 26, and a second bevel gear 34 that meshes with the first bevel gear 32 is attached to a rotation shaft 33 a of the bobbin rotation motor 33. Accordingly, by rotating the second bevel gear 34 by the bobbin rotation motor 33, the first bevel gear 32 is rotated around the X axis, and the pair of coil bobbins 12 are connected via the drive gear 31 that rotates together with the first bevel gear 32. , 12 are rotated separately around the X axis. Therefore, the fixing tool 28, the driving gear 31, and the bobbin rotating motor 33 that rotates the driving gear 31 described above constitute the bobbin holding and rotating mechanism 21 that holds and rotates the pair of coil bobbins 12 and 12.

  A runner block 25 configured to be able to travel on the rail 23 is attached to the movable table 26, and the movable table 26 is supported by the runner block 25 so as to be movable in an arc along the rail 23. The movable base 26 is pivotally supported by a moving gear 36 that meshes with an arcuate gear 24 provided along the rail 23. The moving gear 36 has a center fixed to one end of a rotating shaft 36 a pivotally supported by the movable table 26, and a third bevel gear disposed at the other end of the rotating shaft 36 a provided through the movable table 26. 37 is attached. The movable base 26 is provided with a bobbin moving motor 38, and a fourth bevel gear 39 that meshes with the third bevel gear 37 is attached to a rotation shaft 38 a of the bobbin moving motor 38. Accordingly, by rotating the fourth bevel gear 39 by the bobbin moving motor 38, the third bevel gear 37 is rotated around the X axis, and the movable table 26 is moved via the moving gear 36 that rotates together with the third bevel gear 37. Is configured to be movable in an arc along the rail 23. Therefore, the rail 23, the arc-shaped gear 24, the moving gear 36, and the bobbin moving motor 38 move the bobbin holding and rotating mechanism 21 in an arc shape, and the pair of coil bobbins 12 held by the bobbin holding and rotating mechanism 21. , 12 can be configured to constitute a bobbin moving mechanism 35.

  Returning to FIG. 1, the coil manufacturing apparatus 20 according to the present invention can hold the nipper clamp mechanism 50 that supports and cuts the wire 11 drawn from the wire feed pulley 41 and the end of the drawn wire 11. A nozzle 66 and the like are provided. As described above, in the coil bobbin 12 in this embodiment, the winding grooves 12b and 12c for winding the wire 11 are formed on both sides in the axial direction across the gear 12a (FIG. 10). For this reason, in this manufacturing apparatus 20, it is necessary to separately prepare and simultaneously wind the wire 11 wound around the winding grooves 12b and 12c formed on both sides of the coil bobbin 12. Therefore, in the coil manufacturing apparatus 20 according to the present invention, the pair of coil bobbins 12 and 12 are held in order to wind the wire 11 separately and simultaneously in the winding grooves 12b and 12c formed on both sides of the coil bobbin 12. A pair of the nipper clamp mechanism 50, the nozzle 66, and the like described above are provided with the line L in the Y-axis direction including the bobbin holding and rotating mechanism 21 as a symmetrical line. Since these are symmetric with respect to each other and have the same structure, the one side shown in the upper side of FIG. 1 will be described as a representative, and the perspective view of the one side including the bobbin holding and rotating mechanism 21 in FIG. The figure is shown.

  As shown in FIG. 1 to FIG. 3 and FIG. 9, a wire feeding pulley 41 that feeds the wire 11 is provided on the upper surface of the gantry 20 a via a Y-axis direction fluid pressure cylinder 42 and an X-axis direction fluid pressure cylinder 43. The Y-axis direction fluid pressure cylinder 42 is provided to extend in the Y-axis direction on the gantry 20a, and the X-axis direction fluid pressure cylinder 43 is provided to extend in the X-axis direction on the projecting shaft 42a of the Y-axis direction fluid pressure cylinder 42. . A wire feeding pulley 41 that feeds the wire 11 is pivotally supported on a pivot base 44 so as to be rotatable about the Y axis, and the pivot base 44 is attached to a projecting shaft 43 a of the X-axis direction fluid pressure cylinder 43. Therefore, the wire feeding pulley 41 is configured to be movable in a horizontal plane on the upper surface of the gantry 20a via the fluid pressure cylinders 42 and 43. The wire feeding pulley 41 is wound with a wire 11 fed from a wire supply source (not shown) provided away from the wire feeding pulley 41 in the X-axis direction, and the end of the wire 11 is Z Guided upward in the axial direction is a nipper clamp mechanism 50 described below.

  As shown in FIGS. 1, 2 and 5, the nipper clamp mechanism 50 supports and cuts the wire 11 drawn from the wire feed pulley 41, and a clamp movement for moving the nipper clamp mechanism 50. It is attached to the gantry 20a via the mechanism 45. As shown in detail in FIG. 5, the clamp moving mechanism 45 in this embodiment is configured by a combination of X-axis, Y-axis, and Z-axis direction extendable actuators 46 to 48. The telescopic actuators 46 to 48 constituting the clamp moving mechanism 45 are elongated box-shaped housings 46d to 48d and are extended in the longitudinal direction inside the housings 46d to 48d, and are driven to rotate by servo motors 46a to 48a. It comprises ball screws 46b to 48b and followers 46c to 48c which 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 nipper clamp mechanism 50 is provided on the support plate 51. The support plate 51 is attached to the housing 47d of the Y-axis direction extendable actuator 47 so as to be movable in the Y-axis direction, and the support plate 51 can be moved in the Z-axis direction together with the Y-axis direction extendable actuator 47. A follower 47 c of the telescopic actuator 47 is attached to a follower 48 c of the Z-axis direction telescopic actuator 48. Further, the support plate 51 can be moved in the X-axis direction together with the Z-axis and Y-axis expansion / contraction actuators 47 and 48, and the housing 48 d of the Z-axis expansion / contraction actuator 48 is connected to the follower 46 c of the X-axis expansion / contraction actuator 46. Mounted. The housing 46d of the X-axis direction extendable actuator 46 extends in the X-axis direction and is fixed to the gantry 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.

  As shown in FIGS. 5 and 6, the nipper clamp mechanism 50 includes a first clamp device 52 and a second clamp device 53 provided on the support plate 51 at a predetermined interval in the Z-axis direction, and an upper first clamp. A nipper device 54 provided close to the device 52 from above is provided. The first and second clamping devices 52 and 53 have a pair of gripping pieces 52a and 53a that are opened and closed by air pressure. By closing the pair of gripping pieces 52a and 53a, the first and second clamping devices 52 and 53 are turned vertically by the wire feeding pulley 41. It is comprised so that the wire 11 which goes to a direction can be hold | gripped.

  The nipper device 54 has a pair of cutting blades 54a that are opened and closed by air pressure, and is gripped by the upper first clamp device 52 by closing the pair of cutting blades 54a and gripped by the pair of gripping pieces 52a. Then, the wire 11 protruding upward is configured to be cut in the vicinity thereof. The support plate 51 is provided with an air cylinder 57 for projecting and retracting the pin-like object 56 in the Y-axis direction above the nipper device 54. The pin-like object 56 protruding in the Y-axis direction is provided on the support plate. When the clamp moving mechanism 45 is moved in the three-axis direction together with 51, the wire 11 held by the nozzle 66 described below can be bent along the nozzle 66.

  The nozzle 66 holds the end of the wire 11 drawn through the wire feeding pulley 41, and is attached to the gantry 20a via the nozzle moving mechanism 61 as shown in FIG. The nozzle moving mechanism 61 in this embodiment is configured by a combination of X-axis, Y-axis, and Z-axis direction extendable actuators 62 to 64, and has the same structure as the clamp moving mechanism 45 described above. Then, the mounting plate 67 provided with the nozzle 66 is mounted on the housing 62d of the X-axis direction expansion / contraction actuator 62 so as to be movable in the X-axis direction, and the mounting plate 67 can be moved in the Z-axis direction together with the X-axis direction expansion / contraction actuator 62. The follower 62 c of the X-axis direction extendable actuator 62 is attached to the follower 64 c of the Z-axis direction extendable actuator 64. Further, the mounting plate 67 together with the Z-axis and X-axis direction expansion / contraction actuators 62, 64 can be moved in the Y-axis direction, and the housing 64 d of the Z-axis direction expansion / contraction actuator 64 serves as a follower 63 c of the Y-axis direction expansion / contraction actuator 63. Mounted. The housing 63d of the Y-axis direction extendable actuator 63 extends in the Y-axis direction and is fixed to the gantry 20a. The servo motors 63a to 64a in the telescopic actuators 62 to 64 are connected to control outputs of a controller (not shown) that controls them.

  As shown in FIGS. 5 to 8, the nozzle 66 is made of a plate material having a rhombus shape when viewed from the front, and a through hole 66 a extending in the vertical direction is formed at the center thereof. The nozzle 66 is divided in the Y-axis direction along the axial center direction of the through hole 66a. The nozzle 66 is attached via a divided piece moving mechanism 68 for dividing or uniting the divided pieces 66b and 66c on the left and right sides. Attached to the plate 67. When the wire 11 is supported on each of the first and second clamp devices 52 and 53 in the nipper clamp mechanism 51, the nozzle 66 is positioned between the first and second clamp devices 52 and 53 in the vertical direction. It is comprised so that the wire 11 extended to can be hold | maintained.

  A support wall 69 extending in the Y-axis direction is attached to the mounting plate 67, and a pair of air cylinders 68 and 68 serving as a split piece moving mechanism are provided on the support wall 69. The left and right divided pieces 66b and 66c in the nozzle 66 are attached to sliders 68a and 68a that move in the Y-axis direction by the air pressure of the pair of air cylinders 68 and 68 via support bars 68b and 68b. Therefore, the left and right divided pieces 66b and 66c are attached to be independently movable left and right by a pair of air cylinders 68 and 68, and the wire 11 is inserted between the left and right divided pieces 66b and 66c in a separated state. In this state, the opposing surfaces of the left and right split pieces 66b and 66c are brought into contact with each other, whereby the wire 11 is accommodated in the through-hole 66a formed in the opposing surface, whereby the nozzle 66 causes the wire 11 to be elongated. It is configured to hold it movable in the direction.

  As shown in FIGS. 6 and 8, the attachment plate 67 is provided with a wire guide 71 adjacent to the nozzle 66. The wire guide 71 is formed so as to sandwich the wire 11 from both sides in the axial direction of the pair of coil bobbins 12 and 12 held by the bobbin holding and rotating mechanism 21, that is, the X-axis direction. The wire rod guide 71 in this embodiment is made by bending a steel plate into a U shape, and this wire rod guide 71 is attached to a mounting plate 67 via an air cylinder 72. The air cylinder 72 has its wire guide 72 adjacent to the nozzle 66 by projecting its projecting and retracting shaft 72a as shown by the one-dot chain line in FIG. 8, and its projecting and retracting shaft is immersed as shown by the solid line in FIG. By doing so, the wire guide 72 is pulled back to the mounting plate 67 side and separated from the nozzle 66. The nozzle moving mechanism 61 moves the nozzle 66 that holds the wire 11 and the wire guide 71 that sandwiches the wire 11 in the three-axis directions, and moves the end of the wire 11 held by the nozzle 66 to the coil bobbin 12. The wire 11 held by the locking portions 12d and 12e, or sandwiched by the wire guide 71 is guided to the winding grooves 12c and 12c of the coil bobbin 12.

  As shown in FIGS. 5 to 7, third and fourth clamping devices 73 and 74 are provided above and below the mounting plate 67 so as to sandwich the nozzle 66. As shown in FIG. 6, with the nozzle 66 holding the wire 11 between the first and second clamp devices 52 and 53, the first and second clamp devices 52 and 53 are further sandwiched from above and below. The third and fourth clamp devices 73 and 74 are attached to the top and bottom of the attachment plate 67.

  The third and fourth clamping devices 73 and 74 are attached to the attachment plate 67 via the X-axis direction fluid pressure cylinder 76 and the Z-axis direction fluid pressure cylinder 77, respectively. The X-axis direction fluid pressure cylinder 76 and the Z-axis direction fluid pressure cylinder 77 move the sliders 76a and 77a by air pressure. The Z-axis direction fluid pressure cylinder 77 extends to the mounting plate 67 in the Z-axis direction. An X-axis direction fluid pressure cylinder 76 is attached to a slider 77a that is provided and moves in the Z-axis direction of the Z-axis direction fluid pressure cylinder 77 so as to extend in the X-axis direction. The third and fourth clamping devices 73 and 74 are provided on the slider 76 a that moves in the X-axis direction of the X-axis direction fluid pressure cylinder 76. Therefore, each Z-axis direction fluid pressure cylinder 77 separates the third and fourth clamp devices 73 and 74 from the nozzle 66 by separating the sliders 77a from each other, as shown in FIG. In addition, the third and fourth clamping devices 73 and 74 that are separated from each other in this manner are configured to further sandwich the first and second clamping devices 52 and 53 from above and below.

  Further, each of the X-axis direction fluid pressure cylinders 76 moves the slider 76 a to the nozzle 66 side, so that the gripping pieces 73 a and 74 a in the third and fourth clamp devices 73 and 74 are formed in the through holes of the nozzle 66. It is located on the extension line of 66a, and it is comprised so that the wire 11 which the nozzle 66 hold | maintains can be hold | gripped above and below the nozzle 66. On the other hand, the respective X-axis direction fluid pressure cylinders 76 are moved so that the sliders 76a are pulled back from the nozzle 66 side, whereby the respective gripping pieces 73a, 74a in the third and fourth clamping devices 73, 74 are obtained. Is configured to recede from the extended line of the through hole 66a of the nozzle 66.

  As shown in FIGS. 1, 2, and 5, the coil manufacturing apparatus 20 includes a wire rod drawing mechanism that pulls a wire rod 11 whose ends are locked to the locking portions 12 d and 12 e of the coil bobbin 12 from a wire rod feeding pulley 41. 80 is provided. A wire rod drawing mechanism 80 in this embodiment includes an expansion / contraction actuator 81 provided on the gantry 20a so as to extend in the Y-axis direction, and a support column 82 erected on the follower 81c of the expansion / contraction actuator 81 in the Z-axis direction. And a movable body 83 fitted to the support 82 so as to be movable up and down, and a locking roller 84 having a proximal end fixed to the movable body 83 and extending in the Y-axis direction and capable of locking the wire 11 at the distal end. Elevating rod 85 provided. A fluid pressure cylinder 86 is provided at the tip of the lifting / lowering rod 85 with the retracting shaft 86a directed in the X-axis direction. A locking roller 84 is provided on the retracting shaft 86a of the fluid pressure cylinder 86 so as to be rotatable around the X axis. It is done.

  On the other hand, an elevating motor 87 is provided below the support 82, and an upper pulley 88 is pivotally supported above the support 82. A lower pulley 89 is provided on the rotation shaft 87 a of the lifting motor 87, and a belt 90 is wound between the upper pulley 88 and the lower pulley 89. A part of the belt 90 in the circumferential direction is fixed to the moving body 83, and when the elevating motor 87 is driven and the belt 90 circulates between the upper pulley 88 and the lower pulley 89, a part of the belt 90 is The fixed moving body 83 is configured to move up and down along the supporting column 82 together with the lifting rod 85. Then, the locking roller 84 provided at the tip of the lifting / lowering rod 85 moving up and down in this way is hung around the wire 11 whose ends are locked to the locking portions 12d and 12e of the coil bobbin 12, and rises in that state. Thus, the wound wire 11 is newly drawn out from the wire supply pulley 41.

  Next, the manufacturing method of the coil of this invention using the said winding apparatus is demonstrated.

  The coil manufacturing method of the present invention is a method in which a wire 11 having a predetermined length is wound around a pair of coil bobbins 12 and 12 from both sides. The characteristic point is that, from the wire rod feeding pulley 41, the wire rod one end locking step of locking one end portion of the wire rod 11 fed through the wire rod feeding pulley 41 to the locking portions 12d and 12e of one coil bobbin 12; A wire rod drawing step for drawing out the wire rod 11 by a predetermined length, a wire rod cutting step for cutting the drawn wire rod 11 on the wire rod feeding pulley 41 side, and the other coil bobbin 12 at the other end formed by cutting the drawn wire rod 11. The other end portion of the wire rod locked to the locking portions 12d, 12e, and the wire rod 11 drawn by rotating both the one coil bobbin 12 and the other coil bobbin 12 simultaneously from one side to the other coil bobbin 12 and the other. The coil bobbin 12 is wound around both sides. And in this embodiment, the case where the bobbin movement process which moves a pair of coil bobbins 12 and 12 in circular arc shape between a wire rod one end part latching process and a wire rod other end part latching process is shown.

  Here, in the coil bobbin 12 in this embodiment, winding grooves 12b and 12c for winding the wire 11 are formed on both sides in the axial direction across the gear 12a (FIG. 10). For this reason, the nipper clamp mechanisms 50 and the nozzles 66, etc., which are provided in pairs in a symmetrical structure with the line L in the Y-axis direction including the bobbin holding and rotating mechanism 21 shown in FIG. In the following, each step will be described in detail, assuming that the wire 11 is wound around the winding grooves 12b and 12c formed on both sides of the coil bobbin 12 at the same time.

<Wire rod one end locking process>
In this step, one end of the wire 11 fed through the wire feeding pulley 41 is locked to the locking portions 12d and 12e of the one coil bobbin 12. Therefore, as a premise, as shown in FIGS. 10 and 11, the pair of coil bobbins 12 and 12 are assembled so as to sandwich the foot portions 13a and 13b on both sides of the iron core 13, and as shown in FIG. The connecting portions 13 c and 13 d of the iron core 13 are attached to the movable base 26 by the fixture 28. As shown in FIG. 3, the bobbin holding and rotating mechanism 21 holding the pair of coil bobbins 12 and 12 is moved in an arc shape by the bobbin moving mechanism 35, and as shown by an alternate long and short dash line, It is located above 22a.

  Specifically, the fourth bevel gear 39 is rotated by the bobbin moving motor 38 constituting the bobbin moving mechanism 35, the third bevel gear 37 is rotated around the X axis, and the third bevel gear 37 is rotated together with the third bevel gear 37. The movable base 26 is moved along the rail 23 in a circular arc shape as indicated by a one-dot chain line arrow through the gear 36. Then, when the pair of coil bobbins 12 and 12 are positioned above the arc-shaped cutout 22a, the rotation of the fourth bevel gear 39 by the bobbin moving motor 38 is stopped, and the pair of coil bobbins 12 and 12 are stopped at that position. Let me.

  The end of the wire 11 is locked to the locking portions 12 d and 12 e (FIGS. 10 and 11) by moving the nozzle 66 that holds the end of the wire 11. Here, as shown in FIG. 6, the end portion of the wire 11 fed through the wire feeding pulley 41 is supported by the first and second clamp devices 52 and 53 when starting this process. . Then, the wire 11 extending in the vertical direction between the first and second clamping devices 52 and 53 is sandwiched between the left and right divided pieces 66b and 66c of the nozzle 66, and thereafter, the divided piece moving mechanism 68 is used. The opposing surfaces of the left and right divided pieces 66b and 66c are brought into contact with each other. Then, the wire 11 is accommodated in the through-hole 66a formed in the opposing surface of the left and right divided pieces 66b, 66c, and thereby the nozzle 66 holds the wire 11 so as to be movable in the longitudinal direction.

  Further, when the wire 11 is held by the nozzle 66, the lower fourth clamp device 74 provided on the attachment plate 67 holds the wire 11 between the wire feed pulley 41 and the second clamp device 53. That is, as shown in FIG. 13, each of the Z-axis direction fluid pressure cylinders 77 provided on the mounting plate 67 separates the sliders 77a from each other so that the third and fourth clamping devices 73 and 74 are connected to the nozzle 66. Are separated from each other. Then, the slider 76a of the lower X-axis direction fluid pressure cylinder 76 is moved to the nozzle 66 side to project the fourth clamp device 74 as shown by a solid line, and the wire 11 below the nozzle 66 is held by the gripping piece 74a. Grip. Thereafter, the gripping of the wire 11 in the first and second clamping devices 53 shown in FIG. 6 is canceled. At this time, the wire 11 is gripped by the lower fourth clamping device 74, so that the wire 11 held by the nozzle 66 moves relative to the nozzle 66 and comes out of the through hole 66a. To prevent.

  Then, since the wire 11 protrudes from the upper end of the nozzle 66, the end of the protruding wire 11 is folded back along the nozzle 66. Specifically, the pin-like object 56 is projected in the Y-axis direction by an air cylinder 57 provided above the nipper device 54 shown in FIG. 6, and the pin-like object 56 is moved as shown by the solid line arrow in FIG. The clamp moving mechanism 45 is moved together with the support plate 51. Then, as shown by a one-dot chain line in FIG. 12, the wire protruding upward from the nozzle 66 is bent along the nozzle 66 by the pin-like object 56. Thereafter, the clamp moving mechanism 45 moves the nipper clamp mechanism 50 together with the pin-like object 56 in a direction away from the nozzle 66 so that the subsequent movement of the nozzle 66 is not hindered.

  On the other hand, the bobbin holding and rotating mechanism 21 holding the pair of coil bobbins 12 and 12 is positioned above the arc-shaped cutout 22a as shown by a one-dot chain line in FIG. The portion is locked to the locking portions 12d and 12e of one coil bobbin 12 from below. Specifically, as shown in FIG. 13, the fourth clamp device 74 is raised by a lower Z-axis direction fluid pressure cylinder 77 provided on the mounting plate 67 as indicated by a one-dot chain line, and the fourth clamp device is provided. The wire 11 gripped by 74 is lifted, and one end portion of the folded wire 11 is caused to protrude upward from the upper end of the nozzle 66.

  The nozzle 66 holding the wire 11 with the end of the folded wire 11 protruding upward is moved together with the fourth clamp device 74 so that the locking portion of one coil bobbin 12 is moved as shown in FIG. 12d and 12e are locked from below. And the holding | grip of the wire 11 by the 4th clamp apparatus 74 is eliminated, and the one coil bobbin 12 is rotated about half or once or twice. As a result, as shown in FIG. 15, the end portions of the wire 11 locked to the locking portions 12d and 12e are accommodated in the storage grooves 12f and 12g, and are turned back from the locking portions 12d and 12e. The wire 11 directed toward the pulley 41 is wound around the winding grooves 12b and 12c of the one coil bobbin 12 half or once or twice. In the figure, a state where it is wound once is shown.

  The rotation of the coil bobbin 12 is performed by driving the bobbin rotation motor 33 shown in FIGS. 3 and 4 and rotating the drive gear 31 that meshes with one of the coil bobbins 12. Is prevented from detaching from the locking portions 12d and 12e (FIG. 15). Thus, after the end of the wire 11 is locked to the locking portions 12d and 12e of the one coil bobbin 12, the fourth clamping device 74 (FIG. 13) that has released the grip of the wire 11 is in the X-axis direction. The slider 76a of the fluid pressure cylinder 76 is moved so as to be pulled back from the nozzle 66 side, and the fourth clamp device 74 is moved backward so that the next wire drawing process is not hindered.

<Bobbin moving process>
In this step, the pair of coil bobbins 12 and 12 are moved in an arc shape. Specifically, as shown in FIG. 3, the fourth bevel gear 39 is rotated again by the bobbin moving motor 38 constituting the bobbin moving mechanism 35, the third bevel gear 37 is rotated around the X axis, and the third The movable base 26 positioned above the notch 22a is moved along the rail 23 in an arc shape as indicated by the solid line arrow through the moving gear 36 that rotates together with the bevel gear 37. Then, when the pair of coil bobbins 12 and 12 are positioned below the arcuate cutout 22a, the bobbin moving motor 38 is stopped, and the pair of coil bobbins 12 and 12 are stopped at that position.

<Wire drawing process>
In this step, the wire 11 is pulled out from the wire supply pulley 41 by a predetermined length. This drawing is performed by a wire rod drawing mechanism 80 shown in FIGS. 1, 2 and 5, and an elevating motor 87 in this wire rod drawing mechanism 80 is driven, and a belt 90 that circulates moves the lifting rod 85 together with the moving body 83. Lower. Then, the locking roller 84 provided at the tip of the lifting / lowering rod 85 is lowered to the lower side of the wire 11 extending to the wire feeding pulley 41 with the ends locked to the locking portions 12 d and 12 e of the one coil bobbin 12. The shaft of the fluid pressure cylinder provided at the tip of the lifting / lowering rod 85 is projected, and the locking roller 84 is positioned below the wire 11. In this state, the bobbin moving process described above is performed. Then, the movable base 26 located at the upper part of the notch 22a moves in an arc shape together with the one coil bobbin 12, and the wire 11 whose end is locked to the one coil bobbin 12 as shown in FIG. When the coil bobbin 12 is positioned below the arcuate cutout 22a, the coil bobbin 12 is wound around the locking roller 84.

  Thereafter, from that state, the lifting / lowering motor 87 shown in FIG. 5 is driven in the reverse direction to raise the lifting / lowering rod 85 together with the locking roller 84, and the rising locking roller 84 hangs around the locking roller 84. The drawn wire 11 is newly pulled out from the wire feeding pulley 41 through the nozzle 66. In this drawing, when the length of the drawn wire 11 becomes sufficient to be wound around the pair of coil bobbins 12 and 12, the raising of the elevating rod 85 is stopped, and the wire drawing step is completed.

<Wire cutting process>
In this step, the fed wire 11 is cut on the wire feed pulley 41 side of the nozzle 66. Specifically, the clamp moving mechanism 45 moves the nipper clamp mechanism 50 together with the support plate 51, and the wire 11 below the nozzle 66 is moved by both the first and second clamp devices 52 and 53 as shown in FIG. Grip. At the same time, the wire 11 positioned above the nozzle 66 is gripped by the upper third clamping device 73 provided on the mounting plate 67. That is, as shown in FIG. 18, each Z-axis direction fluid pressure cylinder 77 provided on the mounting plate 67 causes the third and fourth clamp devices 73 and 74 to move to the nozzle 66 by separating the sliders 77a from each other. Are separated from each other. Then, the slider 76a of the upper X-axis direction fluid pressure cylinder 76 is moved to the nozzle 66 side to project the third clamp device 73 as indicated by a solid line, and the wire 11 above the nozzle 66 is moved by the gripping piece 73a. Hold it. Returning to FIG. 17, in this state, the wire 11 below the nozzle 66 is cut by the nipper device 54 provided at the top of the first clamp device 52. At this time, since the wire 11 is gripped by the upper third clamping device 73, the wire 11 held so as to be movable in the longitudinal direction by the nozzle 66 moves relative to the nozzle 66 and comes out of the through hole 66a. To prevent it from happening.

<Wire material other end part locking process>
In this step, the other end formed by cutting the drawn wire 11 is locked to the locking portions 12d and 12e of the other coil bobbin 12. That is, in the previous wire cutting process, when the wire 11 below the nozzle 66 is cut, the other end of the wire 11 formed by cutting protrudes downward from the lower end of the nozzle 66. The other end portion of the wire 11 protruding downward from the lower end of the nozzle 66 is locked to the locking portions 12d and 12e of the other coil bobbin 12. The end portion of the wire 11 protruding to the end is folded along the nozzle 66.

  This folding is the same as the bending operation at the one end portion of the wire 11 shown in FIG. 12, and although not shown, the pin 56 is moved in the Y-axis direction by the air cylinder 57 provided above the nipper device 54. The clamped moving mechanism 45 is moved in the three-axis direction together with the support plate 51 to cause the protruding pin-like object 56 to move in the three axial directions, and the wire 11 that is held by the nozzle 66 and protrudes downward from the nozzle 66 is moved to the nozzle. Fold along line 66 as shown in FIG. After that, the clamp moving mechanism 45 shown in FIG. 17 is configured so that the nipper clamp mechanism 50 is moved to the nozzle 66 while the end portions of the wire 11 fed from the wire feed pulley 41 are held by the first and second clamp devices 52 and 53. It moves to the direction away from, and is saved so that it may not cause trouble in a subsequent process.

  Here, the bobbin holding and rotating mechanism 21 holding the pair of coil bobbins 12 and 12 is moved in an arc shape by the bobbin moving mechanism 35 in the previous bobbin moving process, and is positioned below the arc-shaped notch 22a. . For this reason, the other end portion of the wire 11 is locked to the locking portions 12d and 12e of the other coil bobbin 12 from above. Here, as shown in FIG. 19, since the pair of coil bobbins 12 and 12 are moved in an arc shape and their top and bottom are inverted, one coil bobbin 12 locked to the locking portions 12d and 12e from below is Since the other end portion is reversed when the other end portion is locked, one end portion of the wire 11 is locked to the locking portions 12d and 12e of the one coil bobbin 12 from above. In this state, the other end of the wire 11 is locked to the locking portions 12d and 12e of the other coil bobbin 12 from above, so that both ends of the wire 11 are both of the pair of coil bobbins 12 and 12 from above. It will be locked to.

  In concrete locking of the other end of the wire 11, first, as shown in FIG. 18, the third clamp device 73 is lowered by the upper air cylinder 57 provided on the mounting plate 67, The wire 11 held by the third clamping device 73 is pushed down toward the nozzle 66. Then, at the lower end of the nozzle 66, the other end of the folded wire 11 protrudes downward from the lower end of the nozzle 66. The nozzle 66 holding the wire 11 with the end portion of the folded wire 11 protruding downward is moved by the nozzle moving mechanism 61 together with the third clamp device 73, and as shown in FIG. The 12 locking portions 12d and 12e are locked from above.

  And the holding | grip of the wire 11 by the 3rd clamp apparatus 73 is eliminated, and as shown in FIG. 20, the other coil bobbin 12 is rotated about half or once or twice. In the figure, the case of rotating once is shown. As a result, the end portions of the wire 11 locked to the locking portions 12d and 12e are accommodated in the storage grooves 12f and 12g, and the wire 11 that is folded back from the locking portions 12d and 12e toward the nozzle 66 is One coil bobbin 12 is wound around the winding grooves 12b and 12c half or once or twice. The rotation of the other coil bobbin 12 is performed by driving the bobbin rotation motor 33 shown in FIG. 3 and rotating the drive gear 31 that meshes with the other coil bobbin 12. Is prevented from being detached from the locking portions 12d and 12e.

  After the other end of the wire 11 is locked to the locking portions 12d and 12e of the other coil bobbin 12, the split pieces 66b and 66c on the left and right sides of the nozzle 66 are divided to lock the other coil bobbin 12. The holding | maintenance by the nozzle 66 of the wire 11 which the edge part latched to the parts 12d and 12e is eliminated. Thereafter, the nozzle moving mechanism 61 moves the nozzle 66 and the third and fourth clamping devices 73 and 74 away from the coil bobbin 12 so that the nozzle 66 and the like do not interfere with the next winding process. To do.

<Winding process>
In this step, both the one coil bobbin 12 and the other coil bobbin 12 are simultaneously rotated and wound around the one coil bobbin 12 and the other coil bobbin 12 from both sides. Specifically, a pair of bobbin rotation motors 33 and 33 disposed on the movable base 26 shown in FIGS. 3 and 4 are driven in synchronization with each other, and are driven via the first and second bevel gears 32 and 34. Each of the gears 31 is rotated, and both of the pair of coil bobbins 12 meshed with the gear 12a are rotated in the same direction at the same speed. In this way, the drawn wire 11 is wound around both the one coil bobbin 12 and the other coil bobbin 12 from both sides.

  In this winding step, as shown in FIG. 21, two wire rods wound around both ends of the drawn wire rod 11, that is, both the one coil bobbin 12 and the other coil bobbin 12 are paired with the pair of coil bobbins 12. , 12 is sandwiched by the wire guide 71 from both sides in the X-axis direction. Thereafter, the wire guide 71 sandwiching the wire 11 is reciprocated in the axial direction of the pair of coil bobbins 12 and 12 together with the rotation of the pair of coil bobbins 12 and 12 by the nozzle moving mechanism 61 (FIG. 5). Since the wire rod guide 71 is provided on the mounting plate 67 (FIG. 8) adjacent to the nozzle 66, the wire rod guide 71 is moved together with the nozzle 66 by the nozzle moving mechanism 61. By winding the wire 11 sandwiched from both sides in the axial direction of the coil bobbin 12 by the wire guide 71, the wire 11 is wound around the coil bobbin 12 in which the wire guide 71 is located. It is wound around 12b and 12c. Then, each time the wire 11 is wound around the coil bobbin 12, the wire guide 71 is moved in the axial direction of the coil bobbin 12 by an amount substantially equal to the outer diameter of the wire 11 to thereby move the wire 11 to the coil bobbin. It becomes possible to perform so-called aligned winding in the 12 winding grooves 12b and 12c.

  When the wire 11 drawn and cut by the ascending locking roller 84 is wound around both the one coil bobbin 12 and the other coil bobbin 12 from both sides, the length of the portion of the wire 11 that is not wound. The length gradually decreases. For this reason, at the time of this winding, the locking roller 84 pulling up the wire 11 upward in the Z-axis direction is sequentially lowered along with the winding. That is, the lifting / lowering motor 87 shown in FIG. 5 is driven to lower the lifting / lowering rod 85 together with the locking roller 84 provided at the tip of the lifting / lowering rod 85, and as shown by the broken arrow in FIG. The wire 11 wound around is sequentially fed out to both the one coil bobbin 12 and the other coil bobbin 12. The fluid pressure provided at the tip of the lifting / lowering rod 85 immediately before all of the wire 11 drawn out by the locking roller 84 is wound around both the one coil bobbin 12 and the other coil bobbin 12 from both sides thereof. The projecting shaft 86a of the cylinder 86 is immersed, and the locking roller 84 is pulled out from the wire 11 as shown by the solid line arrow in FIG. 22, and the wire 11 is released. Thereby, all of the wire 11 can be wound around both the one coil bobbin 12 and the other coil bobbin 12.

  Thereafter, the pair of coil bobbins 12 and 12 around which the wire 11 is wound as described above are removed from the bobbin holding and rotating mechanism 21 together with the iron core 13, thereby completing a series of coil manufacturing. Thereby, in this invention, the wire 11 of predetermined length can be automatically wound around a pair of coil bobbins 12 and 12 from both sides.

  In the above-described embodiment, the clamp moving mechanism 45 and the nozzle moving mechanism 61 configured by the combination of the X-axis, Y-axis, and Z-axis direction extendable actuators have been described. The structure is not limited to this, and other types may be used as long as the support plate 51 or the mounting plate 67 can move in three axial directions with respect to the gantry 20a.

  In the above-described embodiment, the case where the fixture 28 is attached by the machine screw 29 has been described. However, the fixture 28 is not limited to that attached by the machine screw 29. As long as the pair of coil bobbins 12 and 12 can be fixed via the iron core 13, the fixing tool 28 may be such that the iron core 13 is attached by a stopper of another type such as a clamp.

DESCRIPTION OF SYMBOLS 11 Wire rod 12 Coil bobbin 12d, 12e Locking part 20 Coil manufacturing apparatus 21 Bobbin holding | maintenance rotation mechanism 35 Bobbin moving mechanism 41 Feeding pulley 45 Clamp moving mechanism 50 Nipper clamp mechanism 52 1st clamp apparatus 53 2nd clamp apparatus 61 Nozzle movement mechanism 66 Nozzle 66b, 66c Dividing piece 68 Dividing piece moving mechanism 71 Wire rod guide 80 Wire rod drawing mechanism

Claims (8)

Manufacture of a coil in which a wire rod (11) having a predetermined length is wound from both sides around a pair of coil bobbins (12, 12) formed with locking portions (12d, 12e) that can lock the ends of the wire rod (11) A device,
A nipper clamp mechanism (50) for supporting and cutting the wire (11) drawn out from the wire feeding pulley (41);
A clamp moving mechanism (45) for moving the nipper clamp mechanism (50);
A nozzle (66) capable of holding the end of the drawn wire (11);
Nozzle that moves the nozzle (66) to lock the end of the wire (11) held by the nozzle (66) to the locking portions (12d, 12e) of the pair of coil bobbins (12, 12) A moving mechanism (61);
A wire rod drawing mechanism (80) for pulling out the wire rod (11) whose end is locked to the locking portion (12d, 12e) from the wire rod feeding pulley (41);
Bobbin holding that holds the pair of coil bobbins (12, 12) and winds the wire (11) of a predetermined length that is drawn out by being rotated and cut around the pair of coil bobbins (12, 12) from both sides A rotation mechanism (21) ;
A bobbin moving mechanism (35) capable of moving the pair of coil bobbins (12, 12) held by the bobbin holding and rotating mechanism (21) by moving the bobbin holding and rotating mechanism (21) in an arc shape; Coil manufacturing equipment.   The coil manufacturing apparatus according to claim 1, further comprising a wire guide (71) for guiding the wire (11) to a pair of coil bobbins (12, 12) with the drawn wire (11) interposed therebetween. The nipper clamp mechanism (50) includes first and second clamp devices (52, 53) that releasably support the wire (11) fed from the wire feeding pulley (41),
A nozzle (66) is supported by each of the first and second clamping devices (52, 53) so as to hold the wire (11) between the first and second clamping devices (52, 53). The coil manufacturing apparatus according to claim 1 or 2, which is configured as described above. Nozzle (66) is divided along the axial direction, any split pieces (66b, 66c) claims 1 comprises a split piece moving mechanism for dividing or combining the (68) 3 in the left and right of the nozzle (66) The coil manufacturing apparatus according to claim 1. A method of manufacturing a coil in which a wire rod (11) of a predetermined length is wound around a pair of coil bobbins (12, 12) from both sides,
One end portion of the wire rod (11) fed out via the wire rod feeding pulley (41) is locked to the locking portion (12d, 12e) of one coil bobbin (12) from below, and one end portion locking step of the wire rod,
A wire rod drawing step for pulling out the wire rod (11) from the wire rod feeding pulley (41) for a predetermined length;
A wire cutting step of cutting the drawn wire (11) on the wire feed pulley (41) side;
A bobbin moving step of moving the pair of coil bobbins 1 (12, 12) in an arc shape;
A wire rod other end portion locking step of locking the other end portion formed by cutting the drawn wire rod (11) from above to the locking portion (12d, 12e) of the other coil bobbin (12),
Both the one coil bobbin (12) and the other coil bobbin (12) are drawn from both sides of the wire rod (11) that is drawn by rotating both the one coil bobbin (12) and the other coil bobbin (12) simultaneously. A coil manufacturing method comprising: a winding step for winding the coil on a coil. In the winding process, the wire guide (71) sandwiching both ends of the drawn wire (11) is reciprocated in the axial direction of the pair of coil bobbins (12, 12) along with the rotation of the pair of coil bobbins (12, 12). The coil manufacturing method according to claim 5 , wherein the wire (11) is wound around each of the pair of coil bobbins (12, 12). The locking portion of the end portion of the wire (11) (12d, 12e) engaging of claim 5 or 6, wherein is performed by moving the nozzle (66) for holding the ends of the wires (11) to Coil manufacturing method. After inserting the wire (11) between the divided pieces (66b, 66c) using the nozzle (66) having the left and right divided pieces (66b, 66c) divided along the axial direction. The method of manufacturing a coil according to claim 7, wherein the split pieces (66b, 66c) on the left and right sides are combined and the wire (11) is held by the nozzle (66).

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