JP2012038871A - Manufacturing method of spiral coil and manufacturing device of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change a pitch between wires wound around a spiral coil relatively easily.SOLUTION: The manufacturing method of a spiral coil 12 obtains a spiral coil formed by multiple unit-wound wires wound around consecutively spirally by gradually displacing in the direction crossing a nozzle 22 a unit-wound wire 16, which is wound around by bending a wire 11 reeled out onwards from the front end of the nozzle 22 in the same direction gradually along the front end face of the nozzle. A first and second plane surfaces 22b and 22c in parallel to an insertion hole 22a and crossing each other near the insertion hole are formed in the nozzle, and the wire 11 is bent in the range of the space where an intersection N of the first and second plane surfaces exists of the four spaces compartmented by two virtual planes M1 and M2 which are in parallel to the first and second plane surfaces and cross at the insertion hole. The wire wound around from the front end of the nozzle and going back to the nozzle is slid after contacting to the first or second plane surface in order to displace the unit-wound wire 16 in the direction crossing the nozzle gradually.

Description

  The present invention relates to a spiral coil manufacturing method for obtaining a spiral coil by making unit-turning wires that make one round continue in a direction intersecting the winding direction, and a manufacturing apparatus therefor.

  Conventionally, as a method for obtaining a spiral coil by continuously connecting unit winding wires that form a square shape in a direction crossing the winding direction, for example, a winding jig having a square cross section is used, and the winding jig is used as the winding jig. There is a manufacturing method in which a wire is spirally wound to obtain a spiral coil, and then a winding jig is removed from the spiral coil. However, in the manufacturing method using the core jig, when the diameter of the wire is large and its rigidity is high, it is difficult to wind the wire into a square along the core jig, and the corner portion of the spiral coil is difficult to wind. There has been a problem in that the shape varies, or the linear portion of the spiral coil is curved, and then the gap between the spiral coil and the core becomes large when a core or the like is inserted into the spiral coil.

  In order to eliminate this point, a method of manufacturing a coil without using a winding jig has been proposed (for example, see Patent Document 1). In this method, a support roller that supports the middle of the wire, a feed mechanism that feeds the wire to the support roller, a fixing mechanism that fixes and supports the wire in front of the support roller, and a bending that abuts against the wire extending from the support roller An apparatus including a roller and a roller moving mechanism that moves the bending roller in a wire bending direction is used. The bending roller moves together with the wire by this roller moving mechanism, so that the wire is bent along the support roller. According to this method, by bending and feeding the wire alternately using such an apparatus, a wire that circulates in a square shape can be obtained without using a core jig. Then, the bending roller is inclined with respect to the fixing mechanism, whereby the spirally wound wire is obtained by sequentially shifting the wire that circulates in a square shape.

JP 2003-264965 A (Patent No. 3986330)

  On the other hand, in recent years, in such a spiral coil, it may be required to provide a predetermined gap between the circulating wires. The spiral coil that requires this is often the case when the spiral coil is put in the case later, and the spiral coil is accommodated in the compressed state in the case, and the spiral coil tries to extend. It is intended to prevent rattling from occurring between the case and the elasticity. Therefore, the pitch between the wires wound around the spiral coil varies depending on the case accommodated, and it is preferable that the pitch between the wires wound around can be changed and adjusted relatively easily in the manufacture of the spiral coil. .

  However, in the method of manufacturing the helical coil in Patent Document 1, since the winding wire is sequentially shifted by inclining the bending roller with respect to the fixing mechanism, if the inclination angle of the bending roller is not changed, the spiral There is a problem that the pitch between the wires that circulate in a shape cannot be changed. That is, in the conventional method of manufacturing a helical coil, it is difficult to change the inclination angle of the bending roller. Therefore, the pitch between wires that circulate every time the helical coil is manufactured or during the manufacturing of the helical coil is changed. There was still a problem to be solved that could not be done.

  An object of the present invention is to provide a method for manufacturing a helical coil and a manufacturing apparatus therefor, which can relatively easily change the pitch between the circulating wires.

  The method for manufacturing a helical coil of the present invention is such that a wire inserted forward through an insertion hole extending in the axial direction of the nozzle and fed forward from the front end of the nozzle is sequentially bent in the same direction so as to be along the front end surface of the nozzle. This is a method of obtaining a spiral coil composed of a plurality of unit winding wires that continuously rotate in a spiral manner by sequentially shifting the unit winding wires in the direction intersecting the nozzle.

  The characteristic point is that the nozzle is formed with first and second planes that are parallel to the insertion hole and intersect in the vicinity of the insertion hole, and are parallel to the first and second planes and intersect at the insertion hole. A wire drawn from the front end of the nozzle is bent in a space range where the intersecting line of the first and second planes is present among the four spaces divided by the virtual plane, and the wire returns from the front end of the nozzle to the nozzle. By sliding the wire after contacting the wire against the first or second plane, the unit winding wire is sequentially shifted in the direction intersecting the nozzle.

  When the bending of the wire protruding forward from the front end of the nozzle is performed by moving the contact moving member brought into contact with the wire from the side in the direction crossing the nozzle, the moving direction of the contact moving member is changed. It is preferable to change the pitch between the plurality of unit winding wires by rotating the nozzle around the insertion hole. And if the bending direction of a wire is brought close to the intersection of the 1st and 2nd planes, the pitch between a plurality of unit circumference wires can be expanded.

  The helical coil manufacturing apparatus of the present invention includes a nozzle in which an insertion hole into which a wire extending from a supply source can be inserted extends in the axial direction, and a nozzle provided on the rear end side of the nozzle to supply the wire to the nozzle. 1 is a spiral coil manufacturing apparatus comprising: a wire feeding device that feeds a wire from the front end of the nozzle; and a wire processing unit that bends the wire protruding forward from the front end of the nozzle along the front end surface of the nozzle.

  The characteristic structure is that the first and second planes that are parallel to the insertion hole and intersect in the vicinity of the insertion hole are formed in the nozzle, and the wire processing means is moved by the member moving mechanism and forward from the front end of the nozzle. It has a contact moving member that contacts the protruding wire from the side and moves in a direction crossing the nozzle so that the wire is bent along the front end surface of the nozzle, and accommodates the wire when the wire is bent. A concave groove for guiding in the bending direction is formed in the contact moving member.

  In the helical coil manufacturing method and the manufacturing apparatus thereof according to the present invention, the wires fed from the nozzles on which the first and second planes are formed are sequentially bent in the same direction. It is the range of the space where the intersection of two planes exists. For this reason, the wire which goes around from the front end of the nozzle and returns to the nozzle comes into contact with the first or second plane. Then, when the wire is slid to the first or second plane, the wire is shifted in the direction intersecting the nozzle and reaches the second or first plane different from the initially abutted surface. Similarly, the winding wire that is sequentially formed by alternately repeating the feeding and bending of the wire thereafter is sequentially shifted in the direction intersecting the nozzle. Thereby, the spiral coil which shifted | deviated to the direction which a some unit winding wire cross | intersects a nozzle is obtained. Here, the amount by which the wire deviates in the direction intersecting the nozzle differs depending on the bending direction of the wire with reference to the first or second plane, and changes the angle formed by the first or second plane and the bending direction. Thereby, the pitch between the unit winding wires which the spiral coil circulates can be changed relatively easily.

  Here, when the bending of the wire is performed by moving the contact moving member brought into contact with the wire from the side in a direction crossing the nozzle, the wire is bent or inserted by changing the moving direction of the contact moving member. By rotating the nozzle around the hole, the angle formed by the first or second plane and the bending direction can be changed, and the pitch between the plurality of unit winding wires can be changed more easily. Then, if a concave groove that accommodates the wire and guides it in the bending direction when the wire is bent is formed in the abutting moving member, it is fed from the front end of the nozzle regardless of the direction in which the obtained unit winding wire is displaced. The wire can be reliably bent in the moving direction of the contact moving member to obtain a spiral coil having a desired shape.

It is a figure which shows the front end of the nozzle which shows the manufacturing method of the helical coil of this invention embodiment. It is a figure which shows the front end of the nozzle which obtains the helical coil in which the pitch between wires was expanded. It is a front end figure of the nozzle which obtains the spiral coil which refracts in the middle. It is a figure which shows the procedure in which the unit winding wire which forms a square is formed. It is a figure which shows the procedure in which the unit winding wire which comprises a rectangle is formed. It is a figure which shows the procedure in which the unit winding wire which comprises a hexagon is formed. It is a front view of the manufacturing apparatus of the spiral coil. It is a top view of the manufacturing apparatus of the spiral coil.

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

  7 and 8 show a helical coil manufacturing apparatus 20 according to the present invention that automatically manufactures the helical coil 12 by bending the wire 11. As shown in FIGS. 4 to 6, the helical coil 12 obtained by the manufacturing apparatus 20 includes a unit winding wire 16 in which the corner portions 13 and the straight portions 14 are alternately provided, as shown in FIGS. 1 to 3. As shown, it is continuous in a direction that intersects with the circumferential direction. The wire 11 is a relatively thick wire whose outer diameter is large to some extent so that its shape can be maintained when it is bent without using a winding jig. In this embodiment, the wire 11 is a so-called round wire having a circular cross section with an insulating film formed on the surface. However, the wire 11 is not limited to a round wire, and a so-called square wire having a square cross section may be used according to the specifications of the spiral coil 12 or the manufacturing process.

  As shown in FIGS. 7 and 8, the wire 11 is wound around a reel 17, and the reel 17 serves as a supply source of the wire 11. The reel 17 is placed on a floor, for example, behind the apparatus 20 at a different location from the helical coil manufacturing apparatus 20. In this embodiment, the reel 17 is installed via a mounting table 18, and a pulley 19 is rotatably provided on the mounting table 18 above the reel 17 via a column 18 a. In this case, the wire 11 is released from the reel 17 and heads toward the upper pulley 19 and is turned by the pulley 19 and supplied to the wire feeder 23. Here, reference numeral 20c in the drawing of the manufacturing apparatus 20 is a scissoring device that turns around the wire 11 fed from the reel 17 as a supply source by turning at the pulley 19, and the wire is drawn by a plurality of small rollers 20d. 11 is sequentially clamped from the periphery, and the wire 11 is configured to extend straight.

  The spiral coil manufacturing apparatus 20 includes, as main components, a straight nozzle 22 that is attached to a base 21 and is inserted through a wire 11 that extends from a supply source 17, and supplies the wire 11 to the nozzle 22. A wire feeder 23 for feeding the wire 11 from the front end is provided. Here, it is assumed that three axes X, Y, and Z orthogonal to each other are set, the X axis extends in the horizontal front-rear direction, the Y axis extends in the horizontal horizontal direction, and the Z axis extends in the vertical direction. 20 will be described.

  In order to ensure the rigidity of the nozzle 22, a cylindrical one having a circular cross section is used, and as shown in detail in FIG. 1, an insertion hole 22 a into which the wire 11 extending from the supply source can be inserted is formed in the axial direction. Formed to stretch. Then, first and second flat surfaces 22b and 22c that are parallel to the insertion hole 22a and intersect in the vicinity of the insertion hole 22a are formed in the nozzle 22. The intersection angle α between the first and second planes 22b and 22c is an obtuse angle, and is formed to be in the range of 100 to 170 degrees, more preferably in the range of 140 to 160, with a preferred angle of 150 degrees being desirable. The angle of intersection α between the first and second planes 22b and 22c is defined as an obtuse angle. This is because it is necessary to slide after contact.

  7 and 8, the rear portion of the nozzle 22 is attached to a nozzle rotating servo motor 24 that rotates the nozzle 22 around the insertion hole 22a (FIG. 1), and the nozzle rotating servo motor 24 is attached. It is attached to the upper part of the member 20b. A control output of a controller (not shown) is connected to the nozzle rotation servomotor 24, and the lower end of the mounting member 20 b with the rear portion of the nozzle 22 attached to the upper portion via the nozzle rotation servomotor 24 is a base 21. Fixed to. The nozzle 22 extends in the X-axis direction by the mounting member 20b and is fixed in the space above the base 21.

  The wire feeding device 23 supplies the wire 11 released from the reel 17 as a supply source and straightened by the scissoring device 20c to the nozzle 22, and the wire feeding device 23 in this embodiment includes the nozzle 22 is provided with a fixing mechanism 26 that is provided in the vicinity of the rear end of 22 to fix and support the wire 11, and a feed mechanism 27 that is provided behind the fixing mechanism 26 and sends the wire 11 in the X-axis direction. The fixing mechanism 26 is located between the nozzle 22 and the feed mechanism 27, and moves up and down by an air cylinder (not shown) to grip the middle of the wire 11, and a fixing base 26b to which the first chuck 26a is attached. The fixed base 26b is attached to the base 21.

  On the other hand, the feed mechanism 27 is moved up and down by an air cylinder (not shown) to grip the middle of the wire 11, a moving base 27 b that supports the second chuck 27 a, and the nozzle 22 behind the nozzle 22. A rail 27c that extends on the extension line and supports the movable base 27b so as to be movable in the X-axis direction with respect to the base 21, a ball screw 27e that is provided on the rail 27c and is screwed to the movable base 27b, and the ball screw 27e And a servo motor 27d for rotational driving. The base 21 is provided with a vertical plate 28 extending in the X-axis direction, and a servo motor 27d is fixed to the vertical plate 28 together with a rail 27c. The moving table 27b is moved by the rotation of the ball screw 27e by the servo motor 27d, and the wire 11 gripped by the second chuck 27a is configured to be movable in the X-axis direction. Reference numeral 29 in the figure denotes a coating stripper 29 provided on the moving base 27 together with the second chuck 27a. This stripping machine 29 removes the coating of the wire 11 supplied to the nozzle 22 in a predetermined range. Configured to be possible.

  The air cylinder in the fixing mechanism 26, the air cylinder in the feed mechanism, the servo motor 27d, and the coating stripper 29 are connected to control outputs of a controller (not shown) that controls them. Then, in response to a command from a controller (not shown), the first chuck 26a of the fixing mechanism 26 is released, and the second chuck 27a that grips the wire 11 of the feed mechanism 27 is moved together with the moving base 27b in the X-axis direction to move the nozzle 22. The wire 11 can be supplied. As a result, the wire 11 can be fed out from the front end of the nozzle 22. On the other hand, when the second chuck 27a of the feed mechanism 27 is retracted on the X axis in a state where the wire 11 is released, the wire 11 once drawn by grasping the wire 11 by the fixing mechanism 26 is retracted together with the second chuck 27a. Can be prevented. Then, the first chuck 26a of the fixing mechanism 26 is released while the wire 11 is again gripped by the retracted second chuck 27a, and the second chuck 27a of the feed mechanism 27 that grips the wire 11 is moved forward again. The wire 11 supplied from the supply source 17 can be sequentially delivered to the nozzle 22. The wire feeder 23 in FIG. 1 is an example, and although not shown, the wire feeder 23 includes a plurality of rollers that are in rolling contact with the wire 11, and is supplied from the reel 17 by rotating the plurality of rollers. The wire 11 may be supplied to the nozzle 22 from between these rollers.

  The helical coil manufacturing apparatus 20 of the present invention further includes wire processing means 30 for bending the wire 11 protruding forward from the front end of the nozzle 22 so as to be along the front end surface of the nozzle 22. The processing means 30 in this embodiment includes a contact moving member 32 that is moved by a member moving mechanism 31 and contacts the wire 11 protruding forward from the front end of the nozzle 22 from the side. The member moving mechanism 31 is provided on the base 21 in front of the nozzle 22 and moves in a triaxial direction with respect to the nozzle 22, and the rotation shaft 41 a is parallel to the insertion hole 22 a of the nozzle 22. As described above, the member rotating servo motor 41 provided on the central moving base 35, the rotating member 42 attached to the rotating shaft 41a and rotating when the member rotating servo motor 41 is driven, and the member rotating servo motor 41 are provided. And a bending servo motor 43 fixed to the rotating member 42 so that the rotating shaft 43a is orthogonal to the rotating shaft 41a.

  The central moving table 35 is attached to the base 21 via the central moving device 36. The central moving device 36 is configured by a combination of X-axis, Y-axis, and Z-axis direction extendable actuators 37 to 39. These telescopic actuators 37 to 39 in this embodiment include ball screws 37b to 39b that are rotationally driven by servo motors 37a to 39a, followers 37c to 39c that are screwed into the ball screws 37b to 39b and moved in parallel. Consists of. In this embodiment, the central moving base 35 is attached to a follower 37c of an X-axis direction expansion / contraction actuator 37 so as to be movable in the X-axis direction, and the X-axis direction expansion / contraction actuator 37 is movable in the Z-axis direction. Attached to the follower 39c of the actuator 39, the Z-axis direction extendable actuator 39 is attached to the follower 38c of the Y-axis direction extendable actuator 38 so as to be movable in the Y-axis direction, and the Y-axis direction extendable actuator 38 is attached to the base 21. It is done. The X-axis servo motor 37a, the Y-axis servo motor 38a, and the Z-axis servo motor 39a in each of the telescopic actuators are connected to control outputs of a controller (not shown) that controls these. The central moving device 36 is configured so that the central moving table 35 can be arbitrarily moved in three axial directions with respect to the nozzle 22 fixed to the base 21.

  The bending servo motor 43 fixed to the rotating member 42 so that the rotating shaft 43a is orthogonal to the rotating shaft 41a of the member rotating servo motor 41 is shown in the enlarged view of FIG. 7 and the enlarged view of FIG. Further, one end of the swing piece 44 is attached to the rotary shaft 43 a so as to intersect the rotary shaft 43 a, and the abutting movement member 32 is provided at the other end of the swing piece 44. A control output of a controller (not shown) is connected to each of the member rotating servo motor 41 and the bending servo motor 43, and the bending servo motor 43 is driven by a controller command so that the swing piece 44 is centered on the base end. When swinging, the contact moving member 32 provided at the other end and in contact with the wire 11 from the side moves in a direction crossing the nozzle 22 as shown in FIGS. It is configured to bend along the front end face. Further, when the member rotating servo motor 41 is driven by the command of the controller and the rotating member 42 rotates, the moving direction of the contact moving member 32 changes, and the contact moving member of the wire 11 fed from the front end of the nozzle 22 is changed. The direction in which 32 is bent is configured to be changeable.

  Returning to the enlarged view of FIG. 7 and the enlarged view of FIG. 8, the contact moving member 32 in this embodiment is a columnar member fixed to the other end of the swing piece 44, and its periphery is connected to the wire 11. It is fixed to the swing piece 44 so as to be able to come into contact. A concave groove 32a having a semicircular cross section is continuously formed on the outer periphery thereof, and the cross section of the concave groove 32a is formed to have a radius equal to or larger than the radius of the wire 11. The contact moving member 32 is fixed to the swinging piece 44 so that the center axis thereof is parallel to the rotating shaft 43a of the bending servo motor 43, whereby the wire 11 in contact with the outer periphery thereof is arranged in the tangential direction of the outer periphery. The concave groove 32a formed on the outer periphery of the wire 11 is configured to receive the wire 11 and guide it in the bending direction when the wire 11 is bent.

  A wire cutting mechanism 51 for cutting the wire 11 protruding from the front end of the nozzle 22 is provided at the upper end of the vertical plate 28. The wire cutting mechanism 51 in this embodiment includes a first air cylinder 52 provided in the X-axis direction at the upper end of the vertical plate 28, and a first movable base 52a of the first air cylinder 52 in the Y-axis direction. A second air cylinder 54 provided through an L-shaped angle 53 as viewed from the front and extending in the Z-axis direction, and a second movable base 54a of the second air cylinder 54 in a top view in the Z-axis direction. And a nipper device 57 provided via an L-shaped extension member 56. A control output of a controller (not shown) is connected to the first and second air cylinders 52 and 54 and the nipper device 57, and the first air cylinder 52 connects the first movable base 52a to the second air cylinder based on a command from the controller. 54, and the second air cylinder 54 lowers the nipper device 57 together with the extension member 56, so that the nipper device 57 reaches the wire 11 protruding forward from the nozzle 22, and the nipper device 57 is driven. By doing so, the cutting blade 57a is configured to be able to cut the wire 11. The second air cylinder 54 raises the nipper device 57, and the first air cylinder 52 is configured to retract the second air cylinder 54 together with the nipper device 57 to place the nipper device 57 in a standby position. .

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

  As shown in FIGS. 4 to 6, in the manufacturing method of the present invention, the wire 11 is inserted through an insertion hole 22 a (FIGS. 1 to 3) extending in the axial direction of the nozzle 22 and fed forward from the front end of the nozzle 22. Are sequentially bent in the same direction along the front end surface of the nozzle 22, thereby obtaining the unit winding wire 16 in which the corner portions 13 and the straight portions 14 are alternately provided to make a round. As shown in FIGS. 1 to 3, the unit winding wire 16 obtained as described above is sequentially shifted in the direction intersecting the nozzle 22 and spirally wound to form a spiral shape composed of a plurality of unit winding wires 16 that are continuous. This is a method of obtaining the coil 12.

  That is, the helical coil 12 to be obtained by the method of the present invention is composed of a plurality of unit winding wires 16 that circulate and continue spirally as shown in FIGS. As shown in FIGS. 4-6, the corner part 13 and the linear part 14 continue alternately. The straight portion 14 of the spiral coil 12 passes through the straight nozzle 22 and is fed out from the front end of the nozzle 22 in a straight line, and the straight portion 14 is drawn by the fed wire 11. Form. In the apparatus 20 shown in FIGS. 7 and 8, the wire 11 is fed by the wire feeding device 23, the first chuck 26a of the fixing mechanism 26 is released, and the wire 11 is moved in the X-axis direction by the feeding mechanism 27. This is done by moving it.

  On the other hand, the corner portion 13 of the unit winding wire 16 is formed by bending the wire 11 fed from the front end of the nozzle 22 so as to be along the front end surface of the nozzle 22. In the apparatus 20 shown in FIG. 7 and FIG. 8, this bending is performed by moving the contact moving member 32 that is in contact with the wire 11 protruding forward from the front end of the nozzle 22 from the side in a direction intersecting the nozzle 22. Is done. At this time, the controller drives the member rotating servo motor 41 and rotates the rotating member 42 to determine the contact direction of the contact moving member 32. 7 and 8 show a case where the contact moving member 32 contacts the wire 11 from above, and the member rotating servo motor 41 rotates so that the rotating shaft 43 of the bending servo motor 43 is positioned in the Y-axis direction. The member 42 is rotated.

  When bending the wire 11, a controller (not shown) controls the central moving device 36 to move the central moving table 35, and contacts the contact moving member 32 from the side to the wire 11 protruding forward from the front end of the nozzle 22. Let As shown in FIGS. 4 to 6, the contact position of the contact moving member 32 is a position where the distance S from the front end edge of the nozzle 22 to the contact moving member 32 is substantially equal to the diameter of the wire 11. In this embodiment in which the concave groove 32a is formed in the contact moving member 32, the distance S from the front edge of the nozzle 22 to the concave groove 32a is the diameter of the wire 11 as shown in the enlarged view of FIG. It is preferable to be approximately equal to

  After the contact moving member 32 is brought into contact with the wire 11 from the side, the bending servo motor 43 is driven by a command from the controller, whereby the swing piece 44 is swung around the base end. And, as shown in FIGS. 4 to 6, provided on the other end of the swing piece 44, the contact moving member 32 that contacts from above is crossed the nozzle 22. Move downward across the wire 11. Then, since the distance S from the front end edge of the nozzle 22 to the contact moving member 32 is a position where it is substantially equal to the diameter of the wire 11, the wire 11 is bent along the front end surface of the nozzle 22. It will be. At this time, the wire 11 contacting the outer periphery of the contact moving member 32 is bent in the tangential direction of the outer periphery, but the concave groove 32a (FIG. 8) formed on the outer periphery accommodates the wire 11. Since the guide is guided in the bending direction, the wire 11 can be bent relatively accurately in the direction in which the contact moving member 32 moves.

  The linear portion 14 and the corner portion 13 are alternately formed as described above. However, the bending direction of the wire 11 in the formation of the corner portion 13 is always bent in the same direction, so that the unit winding wire 16 is formed at the front end of the nozzle 22. Further, in forming the straight portion 14, the length to be drawn differs in the shape drawn by the unit winding wire 16 in the spiral coil 12 to be obtained. For example, in order to manufacture the spiral coil 12 in which the unit winding wire 16 draws a square, as shown in FIG. 4, the corner portion 13 is formed at a right angle and the straight portion 14 is always formed to have the same length. Is done. Further, in order to manufacture the spiral coil 12 in which the unit winding wire 16 draws a rectangle, as shown in FIG. 5, the corner portion 13 has a right angle and corresponds to the long side and the short side of the rectangle to be obtained. The linear portions 14 having a length are formed alternately. In order to manufacture the spiral coil 12 in which the unit winding wire 16 draws a polygon, for example, a hexagon, as shown in FIG. 6, the corner portion 13 is set to 120 degrees and always has the same length. Then, the linear portion 14 is formed. Thus, the shape drawn by the unit winding wire 16 in the helical coil 12 can be changed by making the angle of the corner portion 13 different from the length of the straight portion 14. At this time, the angle of the corner portion 13 can be adjusted by the amount of movement of the contact moving member 32.

  On the other hand, in order to obtain the spiral coil 12, it is necessary to sequentially shift the unit winding wire 16 obtained in this way in a direction intersecting the nozzle 22. For this reason, as shown in FIG. 1, the bending of the wire 11 fed from the front end of the nozzle 22 is parallel to the first and second planes 22b and 22c and intersects the two virtual holes 22a. Of the four spaces A, B, C, and D divided by the planes M1 and M2, the process is performed in the range of the space A where the intersecting line N of the first and second planes 22b and 22c exists. That is, from the range along the two virtual planes M1 and M2, from the front end of the nozzle 22 in the range indicated by A in FIG. 1 showing the inside of the intersection line N of the first and second planes 22b and 22c. It is necessary to bend the drawn-out wire 11. As specific bending within this range, as shown in FIG. 1, when the wire 11 is bent in parallel with the first or second plane 22b, 22c, or not shown, it is inside the first and second planes 22b, 22c. Examples are the case of bending toward the intersection line N between the first and second planes 22b and 22c, or the case of bending near the intersection line N as shown in FIG.

  The case where the wire 11 is bent in parallel to the first plane 22b to produce the spiral coil 12 in which the unit winding wire 16 draws a square will be described. As shown in FIG. When the bending is repeated three times, as shown in FIG. 4 (f), the wire 11 circulates and its tip returns to the nozzle 22 and comes into contact with the second plane 22c. Here, the intersection angle α (FIG. 1) between the first plane 22b and the second plane 22c is an obtuse angle, and the wire 11 is bent in parallel with the first plane 22b. The two planes 22c are inclined and come into contact with each other. Then, as shown in FIG. 4 (h), when the fourth bending is performed, the unit winding wire 16 is obtained, and in contact with the second flat surface 22c at the time of the fourth bending. The wire 11 indicated by the alternate long and short dash line in FIG. 1A is guided to the second plane 22c, slips as indicated by the dashed arrow, and shifts to the first plane 22b. Then, by repeating the subsequent feeding and bending of the wire 11, the wire 11 that circulates from the front end of the nozzle 22 and returns to the nozzle 22 sequentially shifts to the first plane 22 b, as shown in FIG. As shown, a spiral coil 12 is obtained in which a plurality of unit winding wires 16 are displaced in a direction intersecting the nozzle 22.

  Here, in FIG. 1, since the wire 11 is bent parallel to the first plane 22b, the amount F of the unit winding wire 16 that circulates in the direction intersecting the nozzle 22 is from the insertion hole 22a to the first plane 22b. This is a value obtained by adding the wire diameter d of the wire 11 to the wall thickness t. In this embodiment, since the first plane 22b is provided in the vicinity of the insertion hole 22a, the thickness t from the insertion hole 22a to the first plane 22b is relatively small, and the thickness t is the elasticity of the wire 11. If it is within the limit, the unit winding wire 16 shifted to the first plane 22b is in close contact with the newly obtained unit winding wire 16 when the unit winding wire 16 is further obtained, and adjacent unit windings. The spiral coil 12 in which the wires 16 are in close contact with each other can be obtained. That is, the spiral coil 12 in which the pitch P between the plurality of unit winding wires 16 matches the wire diameter d of the wire 11 can be obtained. Here, since the rotating unit winding wire 16 is displaced in the direction intersecting the nozzle 22, it may be difficult to bend the wire 11 fed from the nozzle 22 in parallel with the first plane 22b. Since the concave groove 32a (FIG. 8) is formed on the outer periphery of the contact moving member 32 that actually bends the wire 11, the concave groove 32a accommodates the wire 11 and guides it in the bending direction (FIG. 4B). )) The wire 11 can be bent relatively accurately parallel to the first plane 22b.

  Next, a case where the spiral coil 12 is manufactured by bending the wire 11 fed from the front end of the nozzle 22 close to the intersection line N of the first and second planes 22b and 22c will be described. As indicated by the alternate long and short dash line in FIG. 2A, when the wire 11 is bent in parallel to the first plane 22b, the direction in which the unit winding wire 16 is displaced is orthogonal to the first plane 22b, so that it is indicated by the solid line. In addition, when the wire 11 is bent close to the intersecting line N of the first and second planes 22b and 22c, and the angle formed by the bending direction from the plane parallel to the first plane 22b is β, the unit loop wire that circulates As shown in the enlarged view of FIG. 2 (a), the amount T displaced 16 in the direction intersecting the nozzle 22 is obtained by dividing the amount F displaced when the wire 11 is bent parallel to the first plane 22b by cos β. It becomes quantity. For this reason, when the wire 11 is bent close to the intersection line N, the amount T of displacement of the unit winding wire 16 increases as compared with the case where the wire 11 is bent parallel to the first plane 22b. That is, the amount T of the unit wire 16 that circulates in the direction intersecting the nozzle 22 can be expressed by T = F / (cos β), and the wire 11 has a thickness t from the insertion hole 22a to the first plane 22b. Exceeds the value obtained by adding the wire diameter d. If the deviation amount T exceeds the elastic limit of the wire 11, the unit winding wire 16 is plastically deformed in a shifted state, and the unit winding wire 16 shifted to the first plane 22b as shown in FIG. Thereafter, when the unit winding wire 16 is further obtained, a predetermined gap is formed from the newly obtained unit winding wire 16. For this reason, the pitch P between the plurality of unit winding wires 16 exceeds the wire diameter d of the wire 11, and the spiral coil 12 in which the adjacent wires 11 leave a predetermined gap can be obtained.

  As described above, when the angle formed by the bending direction from the virtual plane M1 parallel to the first plane 22b is β, the amount T of the unit winding wire 16 that circulates in the direction intersecting the nozzle 22 is T = F / (Cosβ). This means that the pitch P between the unit winding wires 16 that the spiral coil 12 circulates is changed by changing the angle β formed in the bending direction from the virtual plane M1 parallel to the first plane 22b. To do. The bending direction of the wire 11 is fed out from the front end of the nozzle 22 because the moving direction of the contact moving member 32 changes when the member rotating servo motor 41 is driven by the controller command and the rotating member 42 rotates. The direction in which the contact moving member 32 of the wire 11 is bent can be changed relatively easily. Therefore, in the present invention, the pitch P between the wires 11 that circulate can be changed relatively easily.

  Here, of the four spaces A, B, C, and D divided by the two virtual planes M1 and M2, the wire 11 is within the space where the intersecting line N of the first and second planes 22b and 22c exists. As the bending direction approaches the intersection line N, the angle at which the tip of the wire 11 returning to the nozzle 22 contacts the first or second plane 22b, 22c increases. For this reason, it may be difficult for the wire 11 to be guided to the first or second plane 22b, 22c and to shift to the second or first plane 22b. The nozzle 22 is attached by the servo motor 24 so as to be rotatable about its insertion hole 22a as the center of rotation. Therefore, as shown in FIG. 3 (a), the wire 11 is first bent parallel to the first plane 22b. The tip of the wire 11 returning to 22 is inclined and brought into contact with the second plane 22c, and the first unit winding wire 16 is surely shifted to the first plane 22b by the second plane 22c, and thereafter, FIG. As shown, the nozzle 22 can be rotated about its insertion hole 22a as the center of rotation to increase the amount of displacement T. Then, by repeating the feeding and bending of the wire 11, as shown in FIG. 3C, the spiral coil 12 in which the adjacent wires 11 leave a predetermined gap can be obtained.

  Further, when the nozzle 22 is rotated with the insertion hole 22a as the rotation center, even if the bending direction of the wire 11 due to the movement of the contact moving member 32 is the same, the wire 11 is released from the surface M1 parallel to the first plane 22b. The angle β (FIG. 2) formed by the bending direction is changed. Therefore, in the present invention, the wire 11 is bent from the surface M1 parallel to the first plane 22b by changing the moving direction of the contact moving member 32 or by rotating the nozzle 22 around the insertion hole 22a. The angle β formed by the direction can be changed, and the pitch P between the plurality of unit winding wires 16 that circulate spirally can be changed more easily. Then, during the manufacturing of the spiral coil 12, by bringing the bending direction of the wire 11 closer to the intersection line N of the first and second planes 22b and 22c, the pitch P between the wires 11 that circulate spirally is set. It becomes possible to enlarge.

  Further, the nozzle 22 is rotated around the insertion hole 22a as shown in FIG. 3 (d) without changing the angle β formed by the direction in which the wire 11 is bent from the plane parallel to the first plane 22b. By changing the moving direction of the contact moving member 32, it is possible to obtain the refracted spiral coil 12 as shown in FIG. For this reason, it becomes possible to manufacture the spiral coil 12 having a predetermined gap between the unit winding wires 16 without using a winding jig, a mold, or the like. The burden can be reduced. If the amount and bending angle of the wire 11 fed out by a controller (not shown) are changed, it is possible to obtain a plurality of types of spiral coils 12 having different shapes, and complete manufacturing of the spiral coil 12 is possible. Automatization becomes possible, and the productivity of the coil 12 can be remarkably increased.

  In the above-described embodiment, although the case where the wire 11 is bent parallel to the first plane 22b and the wire 11 is inclined and brought into contact with the second plane 22c and shifted to the first plane 22b has been described. Although not shown, the wire 11 is bent parallel to the second plane 22c, and the wire 11 inclined and brought into contact with the first plane 22b is shifted to the second plane 22b to obtain the spiral coil 12. May be. Since the spiral direction in this case is opposite to the above-described embodiment, in the present invention, it is possible to easily change the spiral direction of the coil 12 obtained by changing the direction in which the wire 11 is bent. .

  In the above-described embodiment, the contact moving member 32 made of a cylindrical member fixed to the other end of the swing piece 44 has been described. However, the contact move member 32 is connected to the other end of the swing piece 44. As long as it can be pivotally supported and can move and bend the wire 11, the shape is not limited to a cylindrical shape, and may be a prismatic member, for example.

11 Wire 12 Spiral Coil 16 Unit Circulation Wire 17 Reel (Supply Source)
DESCRIPTION OF SYMBOLS 20 Manufacturing apparatus of helical coil 22 Nozzle 22a Insertion hole 22b 1st plane 22c 2nd plane 23 Wire feeder 30 Wire processing means 31 Member moving mechanism 32 Contact moving member 32a Groove M1, M2 Virtual plane A, B, C , D Space delimited by two virtual planes N Intersection line of first and second planes P Pitch between unit winding wires

Claims (4)

The wire (11) inserted through the insertion hole (22a) extending in the axial direction of the nozzle (22) and fed forward from the front end of the nozzle (22) is sequentially aligned along the front end surface of the nozzle (22). A helical coil composed of a plurality of unit winding wires (16) that circulate continuously in a spiral manner by sequentially shifting unit winding wires (16) that circulate by bending in the same direction in a direction intersecting the nozzle (22). In the method of obtaining (12),
First and second planes (22b, 22c) that are parallel to the insertion hole (22a) and intersect in the vicinity of the insertion hole (22a) are formed in the nozzle (22),
Four spaces (A, B, C, which are parallel to the first and second planes (22b, 22c) and separated by two virtual planes (M1, M2) intersecting with the insertion hole (22a), respectively. D) bending the wire (11) fed out from the front end of the nozzle (22) in a space where the intersecting line (N) of the first and second planes (22b, 22c) exists,
The unit winding wire (11) is slid after contacting the first or second plane (22b, 22c) with the wire (11) that wraps around from the front end of the nozzle (22) and returns to the nozzle (22). 16. A method for producing a spiral coil, wherein 16) is sequentially shifted in a direction intersecting the nozzle (22). The bending of the wire (11) protruding forward from the front end of the nozzle (22) causes the contact moving member (32) brought into contact with the wire (11) from the side to cross the nozzle (22). Done by moving,
By changing the moving direction of the contact moving member (32) or by rotating the nozzle (22) around the insertion hole (22a), the pitch (P) between the plurality of unit winding wires (16) is increased. The manufacturing method of the helical coil of Claim 1 made to change.   The pitch (P) between the plurality of unit winding wires (16) is increased by bringing the bending direction of the wire (11) closer to the intersecting line (N) of the first and second planes (22b, 22c). The manufacturing method of the helical coil of description. A nozzle (22) in which an insertion hole (22a) into which a wire (11) extending from a supply source (17) can be inserted extends in the axial direction;
A wire feeding device (23) provided on the rear end side of the nozzle (22) to supply the wire (11) to the nozzle (22) and feed the wire (11) from the front end of the nozzle (22); ,
Wire manufacturing means (30) for bending the wire (11) protruding forward from the front end of the nozzle (22) so as to be along the front end surface of the nozzle (22), There,
First and second planes (22b, 22c) parallel to the insertion hole (22a) and intersecting in the vicinity of the insertion hole (22a) are formed in the nozzle (22),
The wire processing means (30) is moved by a member moving mechanism (31), contacts the wire (11) protruding forward from the front end of the nozzle (22), and crosses the nozzle (22). A contact moving member (32) that moves in a direction to bend the wire (11) along the front end surface of the nozzle (22),
A spiral coil characterized in that a concave groove (32a) for accommodating the wire (11) and guiding it in the bending direction when the wire (11) is bent is formed in the contact moving member (32). Manufacturing equipment.

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