JP5680912B2 - Toroidal coil manufacturing equipment - Google Patents

Description

The present invention relates to a toroidal coil manufacturing apparatus for manufacturing a toroidal coil in which a wire is spirally wound around a ring core forming a closed magnetic circuit such as ferrite or an iron core in the circumferential direction thereof.

  Conventionally, a ring-shaped toroidal coil used for a noise filter or the like stores a certain amount of wire in a shuttle ring interlinking with the inner diameter of the ring core, fixes the winding end to the ring core, and moves the shuttle ring around the ring core. Winding was applied while turning around. However, with this winding method, regardless of whether the wire is thin and soft, a thick and hard wire with a large current capacity requires a large torque in the winding, so the shuttle ring is circulated through the center hole of the ring core with a small inner diameter. Since it becomes difficult to wind the wire around the ring core, there is a limit to downsizing the toroidal coil having a large current capacity.

  In order to eliminate this point, a wire is spirally wound with a winding machine using a predetermined winding core, and the solenoid coil is formed in advance, and approximately one turn at one end of the solenoid coil is made of ferrite or iron. There has been proposed a method for manufacturing a toroidal coil that is wound around a ring core such as a core and rolled while rotating in a winding direction (see, for example, Patent Document 1). In this manufacturing method, since the winding is performed in advance by a winding machine, a solenoid coil can be easily formed even with a relatively thick wire, and then the solenoid coil is wound around the ring core to form a toroidal coil. Therefore, it is said that a toroidal coil can be easily manufactured even with a ring core having a small inner diameter.

JP 2000-1000064 A

  However, in the above-described conventional toroidal coil manufacturing method in which the solenoid coil is wound around the ring core, a step of forming a solenoid coil made of a spiral wire by winding the wire in a spiral shape, and a step of entwining the solenoid coil around the ring core Apart from that, there was a problem that the manufacturing process of the toroidal coil became complicated and its automation became difficult.

  In addition, in the process of forming the solenoid coil, it is necessary to use a winding machine using a predetermined winding core. For example, a toroidal coil using another ring core having a different cross-sectional shape, outer diameter, etc. is manufactured. When doing so, it is necessary to change the inner diameter of the solenoid coil, etc., and in order to make the inner diameter of the solenoid coil different, it is necessary to prepare multiple types of winding cores with different outer shapes, which increases the management burden was there.

An object of the present invention is to provide a toroidal coil manufacturing apparatus that can be manufactured without using a winding core or the like and that can simplify the manufacturing process.

The toroidal coil manufacturing apparatus of the present invention includes a holder for holding a ring core, a core moving actuator configured to move the holder in the direction of the center axis of the ring core, and a wire parallel to the axis of the ring core. A wire feeding device having a nozzle that is fed out in the vicinity of the outer periphery, a first guide roller that comes into contact with the wire in the vicinity of the ring core and before reaching the outer periphery of the ring core, and the vicinity of the outer periphery of the ring core that is fed out A second bending roller that bends the wire that has passed through the ring core toward the center of the ring core, and a third guiding roller that guides the wire bent by the second bending roller through the central hole of the ring core.

A first actuator configured to be able to reciprocate between an operating position for bending the wire that has passed through the vicinity of the outer periphery of the ring core and a standby position separated from the wire, and a third roller for guidance. A second actuator configured to reciprocate between an operating position for guiding the wire to the central hole and a standby position separated from the wire , and the first actuator has a nozzle on one side of the core moving actuator. The second actuator is provided on the provided side and in a direction inclined with respect to the core moving actuator, and the second actuator is provided on the other side of the core moving actuator and in a direction inclined with respect to the core moving actuator. It is characterized by .

In this case, the holder has a holding piece for gripping the ring core from the outer periphery, and the holding piece includes a guide member for guiding the wire and an inclined portion, and the inclined portion is directed outward from the center of the ring core in the radial direction. Accordingly, it is preferable to increase the thickness with the holding piece .

  In the toroidal coil manufacturing method of the present invention, the wire that has been drawn out and passed through the vicinity of the outer periphery of the ring core is sequentially bent along the outer periphery of the cross-section of the ring core, so that the spirally wound wire is directly wound around the ring core. It is not necessary to previously form a solenoid coil as in the prior art. Further, in the toroidal coil manufacturing apparatus of the present invention, the wire fed by the wire feeding device is bent by the first to third rollers, so that the core required by the conventional technique for forming the solenoid coil is not required. . For this reason, the management burden of the core required conventionally can be reduced. Further, if the positions of the second and third rollers are changed by the first and second actuators, the degree of bending of the wire can be changed, and a plurality of types having different outer diameters and cross-sectional shapes can be obtained. The positions of the second and third rollers can be relatively easily associated with the ring core. Therefore, the versatility and productivity in the production of the toroidal coil are enhanced, the production process of the toroidal coil is simplified as compared with the conventional one, and the automation in the production of the toroidal coil becomes possible.

It is a top view which shows the toroidal coil manufacturing apparatus of embodiment of this invention. It is the top view corresponding to Drawing 1 in which the 2nd and 3rd roller of the manufacturing device moved to the standby position. It is the sectional view on the AA line of FIG. 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 a side view of the manufacturing apparatus. It is a figure which shows after a wire is drawn | fed out until the edge part is penetrated by the center hole of a ring core. It is a figure showing a state where a wire is wound around a predetermined range of a ring core, then the ring core is moved and the wire is further fed out. FIG. 4 is a cross-sectional view taken along the line DD of FIG. 3 in which the first turn is wound around the ring core. It is a front view of the ring core by which the wire which is drawn out and curved was wound several times. It is a front view of the ring core by which the wire was wound by the predetermined range. It is a front view of the toroidal coil obtained by the embodiment of the present invention. It is the EE sectional view taken on the line of FIG.

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

  1 to 6 show a toroidal coil manufacturing apparatus 20 according to the present invention. As shown in FIG. 12, the manufacturing apparatus 20 automatically manufactures a toroidal coil 12 in which a wire 14 is spirally wound around a ring core 13. As shown in FIG. 13 showing the cross section, the ring core 13 in this embodiment is formed of a wound magnetic steel strip such as permalloy or amorphous, a sintered body of ferrite, or the like, and forms an annular closed magnetic circuit. The toroidal core 13a and a resin case 13b that accommodates the toroidal core 13a, and the resin case 13b has a circular shape in a cross-sectional shape that crosses the closed magnetic path of the accommodated toroidal core 13a. Exemplified one is formed.

  On the other hand, the wire 14 wound around the ring core 13 is a so-called thick line that can maintain its shape when bent without using a winding core. In this embodiment, a case is shown 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 rectangular wire, it can be expected to increase the space factor of the wire 14 in the toroidal 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 toroidal coil 12 and the like. As shown in FIG. 6, the wire 14 is wound around a reel 17, and this reel 17 becomes 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, three axes of X, Y, and Z orthogonal to each other are set, and the toroidal coil manufacturing apparatus 20 according to the present invention assumes that 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. Will be described.

  The toroidal coil manufacturing apparatus 20 includes a holder 21 that holds the ring core 13. As shown in FIGS. 1 to 3, the holder 21 in this embodiment can be detached from three holding pieces 22 whose tip grips the ring core 13 from the outer periphery and the base ends of the three holding pieces 22. And a mounting base 23 to be fixed to. The holding piece 22 is formed with a recess 22a into which the outer periphery of the ring core 13 enters on the inner side facing each other, and its base end is screwed around the mounting base 23 every 120 degrees (FIG. 5). For this reason, it becomes possible to remove the holding piece 22 from the mounting base 23 by removing the male screw 24 used for screwing. The outer periphery of the ring core 13 enters the recess 22a of the holding piece 22 removed from the mounting base 23, In this state, the holder 21 is configured to hold the ring core 13 by screwing it again to the mounting base 23.

  A guide member 25 for guiding the wire 14 is attached to the holding piece 22 between the recess 22 a and the mounting base 23. The guide member 25 is a plate-like object screwed along the holding piece 22, and from the center of the ring core 13 held by the holding tool 21 toward the outside in the radial direction, An inclined portion 25a that increases the thickness is formed.

  As shown in FIGS. 1 and 2, the base 20a (FIG. 6) of the manufacturing apparatus 20 is provided with a core moving actuator 26 extending in the X-axis direction. The core moving actuator 26 includes a box-shaped main body 26a that is fixed to the base 20a and extends in the X-axis direction, a servo motor 26b that is provided at an end of the main body 26a, and a servo that is provided inside the main body 26a. A ball screw 26c that is rotationally driven by a motor 26b and a follower 26d that is screwed into the ball screw 26c and translates along the main body 26a. An attachment piece 27 is erected on the follower 26d, and the attachment base 23 of the holder 21 is attached to the attachment piece 27 with a male screw 28 so that the center axis of the ring core 13 faces in the X-axis direction. The core moving actuator 26 is configured to be able to move the holder 21 in the X-axis direction together with the follower 26d when the ball screw 26c is rotationally driven by the servo motor 26b.

  As shown in FIG. 6, the toroidal coil manufacturing apparatus 20 includes a wire feeder 31 that feeds a wire 14 parallel to the axis of the ring core 13 held by a holder 21 to the vicinity of the outer periphery of the ring core 13. The wire feeder 31 is a straight nozzle 32 that is attached to the base 20 a and extends from the supply source 17. The wire feeder 31 feeds the wire 14 by sandwiching and rotating the wire 14 adjacent to the nozzle 32. A plurality of pairs of wire feed rollers 33 and 34 are provided. The nozzle 32 has a straight rectangular tube shape into which the wire 14 having a rectangular cross section can be inserted, and the nozzle 32 in this embodiment has a wire 14 as shown in the enlarged view of FIG. The figure shows a product made by fixing a cover plate 32c covering the concave groove 32a with a screw 32d to a long rod-shaped member 32b in which the concave groove 32a that can be accommodated is formed.

  As shown in FIGS. 4 and 6, the base 20 a is provided with a mounting plate 36 erected on the core moving actuator 26 along the X axis direction and extending in the X axis direction. The nozzle 32 is attached to the attachment plate 36 via an attachment 37, and the nozzle 32 extends in the X-axis direction while being attached to the attachment plate 36, and the wire 14 inserted through the nozzle 32 is held by the holder 21. In this embodiment, the wire 14 is parallel to the central axis of the ring core 13 and passes through the vicinity of the outer periphery of the ring core 13 (FIG. 5) which is shifted from the central axis in the Y-axis direction. In this way, it is fixed in the upper space of the base 20a.

  On the other hand, the plurality of pairs of wire feed rollers 33 and 34 sandwich the wire 14 inserted through the nozzle 32 and extending in the X-axis direction from above and below in the vicinity of the nozzle 32. In this embodiment, four pairs of rollers The case where 33 and 34 are provided is shown. Since the four pairs of rollers 33 and 34 have the same structure, the one closest to the holder 21 will be described as a representative. As shown in FIG. A lower roller 33 that contacts from below is pivotally supported by the mounting plate 36. 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 on 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.

  In this embodiment, the wire feeding actuator 38 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 feed 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 raised by the wire feeding actuator 38 in this state, whereby the upper roller 34 is raised, and the wire 14 is moved freely. Configured to be possible. On the other hand, when the slider 38a is lowered by the wire feed actuator 38, the upper roller 34 sandwiches the wire 14 together with the lower roller 33. When the feed 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 feed rollers 33 and 34 can be sequentially paid out in the longitudinal direction.

  Reference numeral 20c in FIG. 6 is a scissor device that straightens the wire 14 fed from the reel 17 as a supply source. The wire 11 is sequentially clamped from the periphery by a plurality of small rollers 20d. It is configured to stretch straight. Reference numeral 35 in FIG. 6 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 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 necessarily required. It is not necessary to provide it.

  The toroidal coil manufacturing apparatus 20 of the present invention includes first to third rollers 42 to 44 that are provided on the same plane so as to contact and bend the wire 14. In this embodiment, the holding tool 21 is provided. The case where it provides on the horizontal surface containing both the central axis of the ring core 13 hold | maintained by (1) and the wire 14 paid out from the nozzle 32 is shown. The first to third rollers 42 to 44 have the same structure, and the first roller 42 will be described as a representative. In this embodiment using a wire 14 made of a so-called flat wire, as shown in FIG. Disc-shaped flanges 42b and 42c that press the rectangular wire 14 from the thickness direction to prevent the wire 14 from increasing in thickness due to bending or bending are provided on the roller body 42a that contacts the side surface of the wire 14. It is provided on both sides of 42a. The first roller 42 is in contact with the wire 14 in the vicinity of the ring core 13 and before reaching the outer periphery of the ring core 13 from the opposite side of the ring core 13, and as shown in FIGS. The first guide roller 42 is provided at the end of the nozzle 32 on the ring core 13 side. Specifically, a pivot support 46 is provided at the end of the rod-shaped member 32 b constituting the nozzle 32 on the ring core 13 side. The first guide roller 42 is pivotally supported by the pivot base 46 so as to be in contact with the wire 14 fed from the nozzle 32 toward the ring core 13 from the opposite side of the ring core 13.

  The second roller 43 bends the wire 14 that has been drawn out and passed through the vicinity of the outer periphery of the ring core 13 toward the center of the ring core 13. The second roller 43 for bending is bent by the first actuator 47 by the ring core 13. 1 between the operating position shown in FIG. 1 where the wire 14 which has passed near the outer periphery of the wire contacts and curves the wire 14 and the standby position shown in FIG. 2 which is separated from both the ring core 13 and the core moving actuator 26. The base 20a is movably provided. The first actuator 47 includes an elongated box-shaped first housing 47b in which a base end of a first extending member 47a, to which a second bending roller 43 is pivotally supported, is fixed at one end, and the first housing 47b. A first servo motor 47c provided at the end, a first ball screw 47d extending in the longitudinal direction inside the first housing 47b and driven to rotate by the first servo motor 47c, and the first ball screw 47d The first follower 47e that is screwed into the first housing 47b and translates along the first housing 47b.

  On the other hand, a first mounting member 48 is erected on one side of the core moving actuator 26, more specifically, on the base 20a on the side where the nozzle 32 is provided with respect to the core moving actuator 26. The first follower 47e is fixed to the first mounting member 48 so that the first housing 47b is inclined with respect to the X axis. When the first ball screw 47d is rotated forward or backward by the first servo motor 47c, the first actuator 47 is in response to the first follower 47e fixed to the base 20a via the first mounting member 48. The first housing 47b moves in the longitudinal direction, and the second bending roller 43 pivotally supported by the first housing 47b via the first extending member 47a is configured to be able to reciprocate between the operating position and the standby position. Is done.

  The third roller 44 guides the wire 14 bent by the second bending roller 43 so as to be inserted into the center hole 13c of the ring core 13 held by the holder 21, and the third roller 44 for guiding is The second actuator 49 is movable between the operating position shown in FIG. 1 for guiding the wire 14 to the central hole 13c and the standby position shown in FIG. 2 away from both the ring core 13 and the core moving actuator 26. It is provided on the base 20a. The second actuator 49 includes an elongated box-shaped second housing 49b in which a base end of a second extending member 49a, to which a third guide roller 44 is pivotally supported, is fixed at one end, and the second housing 49b. A second servo motor 49c provided at the end, a second ball screw 49d extending in the longitudinal direction inside the second housing 49b and driven to rotate by the second servo motor 49c, and the second ball screw 49d And a second follower 49e that is screwed into the second housing 49b and translated along the second housing 49b.

  On the other hand, the core moving actuator 26 is placed on the other side of the core moving actuator 26, specifically, on the opposite base 20a where the first mounting member 48 is provided with respect to the core moving actuator 26. The second mounting member 51 is erected so as to be sandwiched together with the first mounting member 48, and the second follower 49e is fixed to the second mounting member 51 so that the box-shaped second housing 49b is inclined with respect to the X axis. . In this way, the second actuator 49 is attached to the base 20 a so that the first actuator 47 and its extension line intersect in the vicinity of the ring core 13. When the second ball screw 49d is rotated forward or backward by the second servo motor 49c, the second actuator 49 is in response to the second follower 49e fixed to the base 20a via the second mounting member 51. The second housing 49b moves in the longitudinal direction, and the third guide roller 44 pivotally supported by the second housing 49b via the second extending member 49a is configured to be reciprocally movable between the operating position and the standby position. Is done.

  Further, the toroidal coil manufacturing apparatus 20 is provided with a cutter device 52 for cutting the wire 14 fed from the nozzle 32. The cutter device 52 has an operating position in which the wire 14 fed from the nozzle 32 is cut in the vicinity of the nozzle 32 by the cutter actuator 53 and a standby position shown in FIG. 1 that is separated from the wire 14 in the Y-axis direction. The base 20a is provided so as to be movable between the two. The cutter actuator 53 includes an elongated box-shaped housing 53b that is fixed to the base 20a so as to face one end of the holder 21 in the Y-axis direction, and a cutter moving servo provided at the other end of the housing 53b. A motor 53c, a ball screw 53d that extends in the longitudinal direction inside the housing 53b and is rotationally driven by the cutter moving servo motor 53c, and is screwed into the ball screw 53d to be along the housing 53b in the Y-axis direction. It is comprised by the cutter follower 53e which moves to (3).

  As shown in FIG. 5, the cutter device 52 includes a main body 52a attached to a cutter follower 53e in a cutter actuator 53 via a mounting bracket 54, and a cutting blade 52b provided at a lower portion of the main body 52a. , 52c. The cutting blades 52b and 52c are superposed vertically and extend in the Y-axis direction, and their base ends are pivotally supported on the lower portion of the main body portion 52a so that the tip faces the wire 14. These cutting blades 52b and 52c can swing as shown by a one-dot chain line, and when the air is supplied to the main body 52a, the cutting blades 52b and 52c come into contact with each other as shown by a solid line arrow. When there is a wire 14 between them, the wire 14 is cut, and the supplied air is discharged from the main body 52a, thereby separating the cutting blades 52b and 52c from each other as shown by a one-dot chain line. Configured as follows. When the ball screw 53d is rotated forward or backward by the servo motor 53c, the cutter actuator 53 moves the follower 53e, and the cutting blades 52b and 52c in the cutter device 52 are operated to sandwich the wire 14 and the cutting blade. 52b and 52c are comprised so that a reciprocation is possible between the standby positions spaced apart from the wire 14. FIG.

  Next, the manufacturing method of the toroidal coil 12 of this invention which manufactures the toroidal coil 12 using such a coil manufacturing apparatus 20 is demonstrated.

  As shown in FIG. 12, a toroidal coil 12 to be obtained by the method of the present invention is formed by winding a wire 14 around a ring core 13 in a spiral shape. In this embodiment, a single ring core 13 is used. Fig. 3 shows a structure comprising three wires 14 wound in a spiral shape. The partition member 16 between the three wires 14 in FIG. 12 is attached after the wire 14 is wound, and when the wire 14 is wound, the partition member 16 is not attached. And When the wire 14 is wound, the ring core 13 is held by three holding pieces 22 provided every 120 degrees as shown in FIG. 5, and the holding pieces 22 of the ring core 13 held by these holding pieces 22. The wire 14 is wound between the holding piece 22 in a spiral shape.

  The ring core 13 is held by the holder 21 so that its axis extends in the X-axis direction, and the wire 14 parallel to the axis of the ring core 13 is straightly delivered to the vicinity of the outer periphery of the ring core 13. Since the wire 14 is wound between the holding piece 22 and the holding piece 22 of the ring core 13, as shown in FIG. 5, the wire 14 is initially drawn out in the vicinity of the holding piece 22 to hold the holding tool 21. Is attached to an attachment piece 27 in the core moving actuator 26, and the guide member 25 in the holding piece 22 through which the wire 14 passes in the vicinity is positioned between the central axis of the ring core 13 and the wire 14 to be fed out. Further, the holding tool 21 together with the mounting piece 27 is positioned on the wire feeder 31 side by the core moving actuator 26 as shown in FIG. At this time, the first and second rollers 43 and 44 are positioned at the standby position outside the core moving actuator 26 by the first and second actuators 47 and 49, and the cutter device 52 is also positioned at the standby position by the cutter actuator 53. Keep it in the position.

  As shown in FIG. 4, the feeding of the wire 14 is performed by driving the feeding servo motor 41 in the wire feeding device 31 to rotate the upper roller 34 that sandwiches the wire 14 together with the lower roller 33. , 34 is fed out a predetermined length. At this time, when the force for lowering the slider 38a by the wire feed actuator 38 is not sufficient and the force for the upper roller 34 and the lower roller 33 to sandwich the wire 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. Then, as shown in FIG. 7A, when the wire 14 having a predetermined length is fed by the wire feeding device 31, the feeding of the wire 14 is temporarily stopped.

  Next, as shown in FIG. 7B, the wire 14 that has been drawn out and passed through the vicinity of the outer periphery of the ring core 13 is bent toward the center of the ring core 13. This is performed by moving the second bending roller 43 in the standby position to the operating position by the first actuator 47. Specifically, the first servomotor 47c in the first actuator 47 shown in FIG. 2 rotates the first ball screw forward, and the first housing 47b is attached to the first follower 47e fixed to the base 20a. The second bending roller 43 pivotally supported by the first housing 47b via the first extending member 47a is moved from the standby position to the operating position shown in FIG. As shown in FIG. 7 (b), the second bending roller 43 that moves from the standby position to the operating position as indicated by the solid line arrow passes through the vicinity of the outer periphery of the ring core 13 in the course of movement, and extends straight. 14, the wire 14 is bent so as to follow the cross-sectional shape of the core while being in contact with the ring core 13, and the wire 14 is bent toward the center of the ring core 13 in a state where the wire 14 has reached the operating position. At this time, the wire 14 generates a force to rotate about a portion that contacts the ring core 13, and the wire 14 before reaching the ring core 13 tries to move away from the ring core 13, but in the vicinity of the ring core 13. Since the first roller for guide 42 is in contact with the wire 14 before reaching the outer periphery of the ring core 13 from the opposite side of the ring core 13, the wire 14 before reaching the ring core 13 is separated from the ring core 13. There is no such thing as bending.

  Thereafter, as shown in FIG. 7C, the wire 14 bent by the second bending roller 43 is inserted into the central hole 13 c of the ring core 13. This is performed by moving the guide third roller 44 in the standby position to the operating position by the second actuator 49. Specifically, the second servomotor 49c in the second actuator 49 shown in FIG. 2 rotates the second ball screw forward, and the second housing 49b is attached to the second follower 49e fixed to the base 20a. The third guide roller 44 pivotally supported by the second housing 49b via the second extending member is moved from the standby position to the operating position shown in FIG. As shown in FIG. 7C, the third guiding roller 44 that moves from the standby position to the operating position as indicated by the solid line arrow is attached to the wire 14 that is bent by the second bending roller 43 during the movement. The wire 14 is brought into contact with the ring core 13 and the end of the wire 14 is inserted through the center of the core in the state where the wire 14 has reached the operating position.

  In the state shown in FIG. 7C in which the end portion of the wire 14 is inserted into the center of the core, the feeding of the wire 14 by the wire feeding device 31 is resumed. That is, the feeding servo motor 41 in the wire feeding device 31 is driven again to rotate the upper roller 34, and the wires 14 sandwiched between the upper and lower rollers 33, 34 are sequentially fed out. As a result, the wire 14 is continuously drawn straightly in the vicinity of the outer periphery of the ring core 13, and the wire 14 that has been drawn out and passed in the vicinity of the outer periphery of the ring core 13 moves toward the center of the ring core 13 by the second bending roller 43 in the operating position. In this way, the ring core 13 is brought into contact with the ring core 13 and is sequentially bent along the cross-sectional shape of the core. At this time, the wire 14 before reaching the ring core 13 tries to move away from the ring core 13, but reaches the ring core 13 by the first guide roller 42 that contacts the wire 14 before reaching the outer periphery of the ring core 13. The former wire 14 is prevented from being bent away from the ring core 13.

  The wire 14 that is drawn out and sequentially bent toward the center of the ring core 13 by the second bending roller 43 is always inserted into the central hole 13c of the ring core 13 by the third guiding roller 44 at the operating position. Here, since the 1st-3rd roller 44 exists on the horizontal surface containing both the center axis | shaft of the ring core 13 and the wire 14 extended | stretched, the wire penetrated by the center hole 13c of the ring core 13 by the 3rd roller 44 for guidance. The end portion of 14 is wound and approaches the wire 14 fed out by the wire feeding device 31. However, as shown in FIG. 9, a guide member 25 is provided on the holding piece 22 located in the vicinity of the wire 14 to be fed out, and the guide member 25 extends from the center of the ring core 13 toward the outside in the radial direction. An inclined portion 25a that increases the thickness of the holding piece 22 is formed. For this reason, the end portion of the wire 14 is guided by the inclined portion 25 a in the guide member 25 and is shifted in a direction away from the holding piece 22. Thereby, it is avoided that the wire 14 wound around the ring core 13 interferes with the straight wire 14 fed out by the wire feeding device 31, and the end portion of the wire 14 is guided in the circumferential direction of the ring core 13.

  When the wire 14 is continuously fed by the wire feeding device 31, the continuously fed wire 14 passes through the vicinity of the outer periphery of the ring core 13 and is then sequentially bent toward the center of the ring core 13 by the second bending roller 43. To do. The curved wire 14 passes through the central hole 13 c of the ring core 13 by the third guide roller 44. And since the wire 14 which curves and passes the center hole 13c is guided to the circumferential direction of the ring core 13 by the inclination part 25a in the guide member 25, as shown in FIG. 10, the wire 14 circulates helically. The wire 14 is wound around the ring core 13. Thus, the wire 14 is spirally wound around the ring core 13, and the wire 14 wound around the ring core 13 is sandwiched between the holding piece 22 and the holding piece 22 as shown in FIGS. 8A and 11. When the wire 14 is wound a predetermined number of times, the feeding of the wire 14 is stopped.

  Thereafter, the first and second rollers 43 and 44 are moved to the standby position by the first and second actuators 47 and 49. Then, as shown in FIG. 8B, the holding tool 21 is moved away from the wire feeder 31 by the core moving actuator 26, and the wire 14 is moved by the wire feeder 31 at the same speed as the moving speed. Pay out. Then, after the wire 14 having a predetermined length is fed out, the cutter device 52 is moved from the standby position to the operating position by the cutter actuator 53 as shown by a one-dot chain line arrow in FIG. And the wire 14 existing between the ring core 13 is cut by the cutter device 52. Thereby, what is called winding which makes the wire 14 circulate in the part pinched | interposed into the holding piece 22 of the ring core 13 and the holding piece 22 is complete | finished.

  Such a winding of the wire 14 is repeated for each portion sandwiched between the holding piece 22 and the holding piece 22 of the ring core 13, and the three wires 14 spirally wound around the single ring core 13 are shown in FIG. The toroidal coil 12 shown is obtained.

  Therefore, in the toroidal coil manufacturing apparatus 20 and the manufacturing method thereof according to the present invention, the wire 14 that has been drawn and passed through the vicinity of the outer periphery of the ring core 13 is sequentially bent along the outer periphery of the cross-section of the ring core 13, thereby spirally circulating. The wire 14 to be wound can be directly wound around the ring core 13. For this reason, it is not necessary to previously form a solenoid coil as in the prior art. Further, since the wire 14 fed out by the wire feeding device 31 is bent by the first to third rollers 42 to 44, the winding core required by the conventional technique for forming the solenoid coil is not required. For this reason, the management burden of a winding core does not arise. In particular, since the second bending roller 43 and the third guiding roller 44 can be moved by the first and second actuators 47 and 51, the degree of bending of the wire 14 is changed by changing their positions. It becomes possible. For this reason, even if it is multiple types of ring core 13 from which an outer diameter and its cross-sectional shape differ, the position of the 2nd and 3rd rollers 43 and 44 can be made to respond | correspond easily to them. Therefore, by changing the positions of the second and third rollers 43 and 44, the wire 14 can be curved according to the cross-sectional shape of the ring core 13, and even the ring core 13 having a different outer diameter or cross-sectional shape can be used. The wire 14 can be spirally wound around it. Therefore, the versatility and productivity in the production of the toroidal coil are enhanced, the production process of the toroidal coil is simplified as compared with the conventional one, and the automation in the production of the toroidal coil becomes possible.

  In the above-described embodiment, the holding tool 21 having three holding pieces 22 whose tips hold the ring core 13 from the outer periphery is used, and the wire 14 is wound between the holding pieces 22 and the holding pieces 22. Although the case where the toroidal coil 12 composed of the three wires 14 spirally wound around the single ring core 13 has been described, as long as the holder 21 can hold the ring core 13, how many holding pieces 22 are provided. It may be. For example, when obtaining the toroidal coil 12 composed of two wires 14 spirally wound around a single ring core 13, a holding tool 21 including two holding pieces 22 is used, and the holding piece 22 and the holding piece are used. It is conceivable that the wire 14 is wound between the wires 22. Further, when the wire wound around the ring core 13 exceeds the holding piece 22, a holding tool 21 including four or more holding pieces 22 may be used.

  Further, in the above-described embodiment, the base ends of the plurality of holding pieces 22 are screwed around the mounting base 23, and the ring core 13 can be held by removing and attaching the plurality of holding pieces 22 via the male screws 24. Although the structured holding tool 21 has been described, the holding tool 21 may be a so-called mechanical chuck configured to be movable radially about the ring core 13 to be held by a plurality of holding pieces. . If a plurality of holding pieces for holding the ring core are simultaneously opened and closed using a holder such as a mechanical chuck, the ring core 13 can be held as compared with the case where the plurality of holding pieces 22 are removed separately. Work can be facilitated.

  In the above-described embodiment, although the wire feeding device 31 provided with the four pairs of wire feeding rollers 33 and 34 for feeding out the wire 14 and rotating the upper roller 34 of the wire feeding device 31 is 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.

  In the above-described embodiment, the case where the wire feeding actuator 38 that moves the upper roller 34 in the wire feeding device 31 up and down is a fluid pressure cylinder. However, the wire feeding actuator 38 is limited to the fluid pressure cylinder. Is not to be done. For example, the wire feeding actuator 38 may be configured such that the slider 38a is movable in the Z-axis direction by a servo motor as long as the upper roller 34 can be moved up and down. Further, the wire feeding device 31 may have a structure in which the wire feeding rollers 33 and 34 are not used as long as the wire 14 can be fed out.

  In the embodiment described above, the mounting piece 27 is erected on the follower 26d of the core moving actuator 26, and the mounting base 23 of the holder 21 is attached to the mounting piece 27 with the male screw 28. Instead of the male screw 28, the holder 21 may be attached to the attachment piece 27 via an indexing mechanism that rotates the holder 21 at a predetermined angle. For example, when obtaining the toroidal coil 12 shown in FIG. 12 composed of three wires 14 spirally wound around a single ring core 13, as described above, the wire 14 is wound around the holding piece of the ring core 13. It is necessary to repeat every part between 22 and the holding piece 22. That is, after the winding of the wire 14 is completed within the range sandwiched between the holding piece 22 and the holding piece 22 of the ring core 13, the ring core 13 is rotated 120 degrees in the circumferential direction, so that another holding piece 22 and holding piece 22 are attached. It is necessary to newly start the winding of the wire 14 in the sandwiched range. However, if the holder 21 is attached via the indexing mechanism at this time, the indexing mechanism can reliably rotate the holder 21 together with the ring core 13 at 120 degrees around the axis of the ring core 13. The rotation work can be expected to be reliable and easy.

DESCRIPTION OF SYMBOLS 12 Toroidal coil 13 Ring core 13c Center hole 14 Wire 20 Toroidal coil manufacturing apparatus 21 Holder 31 Wire feeder 42 First roller for guide 43 Second roller for bending 44 Third roller for guide 47 First actuator 49 Second actuator

Claims (2)

A holder (21) for holding the ring core (13);
A core moving actuator (26) configured to be capable of moving the holder (21) in the central axis direction of the ring core (13);
A wire feeder (31) provided with a nozzle (32) for feeding a wire (14) parallel to the axis of the ring core (13) to the vicinity of the outer periphery of the ring core (13);
A first guide roller (42) in contact with the wire (14) in the vicinity of the ring core (13) and before reaching the outer periphery of the ring core (13) from the opposite side of the ring core (13);
A second bending roller (43) that curves the wire (14) that has been drawn out and passed near the outer periphery of the ring core (13) toward the center of the ring core (13);
A third guiding roller (44) for guiding the wire (14) bent by the second bending roller (43) to pass through the central hole (13c) of the ring core (13) ;
The second bending roller (43) is configured to be capable of reciprocating between an operating position for bending the wire (14) that has passed near the outer periphery of the ring core (13) and a standby position spaced from the wire (14). A first actuator 47,
An operating position for guiding the third roller (44) for guiding the wire (14) to the central hole (13c) and the wire
A second actuator (49) configured to be able to reciprocate between a standby position separated from the
With
The first actuator (47) is provided on the side where the nozzle (32) is provided on one side of the core moving actuator (26) and in a direction inclined with respect to the core moving actuator (26). And
The second actuator (49) is provided on the other side of the core moving actuator (26) and in a direction inclined with respect to the core moving actuator (26).
A toroidal coil manufacturing apparatus characterized by that . The holder (21) has a holding piece (22) for gripping the ring core (13) from the outer periphery,
The holding piece (22) includes a guide member (25) for guiding the wire (14) and an inclined portion (25a),
The inclined portion (25a) increases the thickness of the holding piece (22) from the center of the ring core (13) toward the outside in the radial direction.
The toroidal coil manufacturing apparatus according to claim 1.

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