JP5586341B2 - Winding machine and air core coil manufacturing method - Google Patents

Description

  The present invention relates to a winding machine for manufacturing an air core coil used for a voice coil for a small speaker and the like and a method for manufacturing an air core coil using the same.

  Conventionally, in a speaker used in a small device such as a mobile phone, a relatively small coil in which a relatively thin wire is wound in an annular shape is used. As a method for manufacturing such a coil, a winding device has been proposed in which a coil wire is wound around a winding core having a circular cross section (see, for example, Patent Document 1). In this winding device, a coil having a desired cross-sectional shape can be obtained by removing a coil made of a wire wound around the winding core from the winding core.

Japanese Patent Laid-Open No. 9-148168

  However, in the above-described conventional winding device, a predetermined tension is applied to the coil wire and the coil is wound around the winding core. Therefore, it is relatively difficult to remove the coil made of the wire wound around the winding core from the winding core. There is a problem that becomes difficult. In order to facilitate this removal, the above-mentioned Patent Document 1 uses a wire guide for removing the coil from the winding core, but the wire guide is brought into contact with the end of the obtained coil and the coil is wound. If it is forcibly removed from the core, the surface coating of the wire on the inner circumference of the coil wound with a predetermined tension applied will slide with the winding core, which may damage the coating. .

  An object of the present invention is to provide a winding machine that can relatively easily remove a coil made of a wire wound around a winding core from the winding core without damaging the coating of the wire, and a method for manufacturing an air-core coil. There is to do.

  The winding machine of the present invention has a divided piece divided into a plurality in the circumferential direction at the tip, and a cylinder configured such that the outer diameter of the tip can be enlarged or reduced by increasing or reducing the interval between the plurality of divided pieces. And an operating rod having a truncated cone-shaped operation piece that is slidably inserted into the winding core and enters or leaves the center of the plurality of divided pieces to enlarge or reduce the outer diameter of the leading end of the winding core And an operating rod moving mechanism for moving the operating rod relative to the winding core to cause the operating piece to enter or leave the center of the plurality of divided pieces, and a wire rod around the tip of the winding core by rotating the winding core together with the operating rod. And a core rotation drive mechanism for winding the wire.

  A first guide member that restricts one winding width of a wire rod that is inserted into the core and wound around the tip of the core, and a detachable fit on the tip side of the core to be wound around the tip of the core. A second guide member that regulates the other winding width of the wire to be rotated, and is fitted at the tip of the core between the first guide member and the core and between the second guide member and the core. It is further preferable to form a gap into which the end of the cylindrical bobbin enters. Then, a ring member having the same diameter as the cylindrical bobbin and an elastic body that urges the ring member are inserted into the gap between the first guide member and the core, and the second guide member is fitted into the tip of the core. The edge of the cylindrical bobbin enters the gap together with the ring member against the urging force of the elastic body, and the elastic body moves the cylindrical bobbin through the ring member while the second guide member is detached from the tip of the winding core. It is also possible to discharge from the gap.

  The manufacturing method of the air core coil of the present invention increases the outer diameter of the tip by increasing the interval between the plurality of split pieces of the core having the tip divided into a plurality of pieces divided in the circumferential direction, and expanding the core. An air core coil formed by winding a wire around the outer periphery of the tip is formed at the tip of the core, and the tip of the core on which the air core coil is formed by reducing the interval between the plurality of divided pieces The outer diameter is reduced, and the air core coil is extracted from the outer periphery of the reduced tip of the winding core.

  If a cylindrical bobbin is fitted to the tip of the core whose outer diameter has been reduced before the outer diameter of the core is increased, the wire is wound around the outer periphery of the cylindrical bobbin, and the air core coil is extracted. With a bobbin. In this case, before winding the wire rod after inserting the cylindrical bobbin at the tip of the winding core, one end edge of the cylindrical bobbin is placed in the gap between the first guide member fitted into the winding core and the winding core. If the second guide member is inserted into the leading end side of the winding core and the other edge of the cylindrical bobbin is inserted into the gap between the second guide member and the winding core, the first guide A wire rod can be wound around the outer periphery of the cylindrical bobbin between the guide member and the second guide member. Then, after forming the air core coil at the tip of the core and before extracting the air core coil from the outer periphery of the core, the second guide member is detached from the tip of the core, and the cylindrical bobbin is removed from the core. It is preferable to move the end of the cylindrical bobbin together with the coil in the axial direction from the gap between the first guide member and the core.

  In the present invention, when winding a wire for a coil, the coil made of the wire wound around the winding core is removed from the winding core, although a predetermined tension is applied to the wire and wound around the winding core. In addition, the outer diameter of the core tip around which the wire is wound is reduced. For this reason, a gap is generated between the outer periphery of the core and the inner periphery of the coil, and the coil can be removed from the core relatively easily. Thus, if a gap is generated between the outer periphery of the winding core and the inner periphery of the coil, it is possible to avoid that the surface film of the wire rod and the winding core on the inner periphery of the coil are slid significantly during the removal. The coil made of the wire wound around the winding core can be removed from the winding core relatively easily without damaging the coating of the wire.

  In addition, when the air core coil is formed around the cylindrical bobbin, the air core coil is extracted together with the cylindrical bobbin, but the outer diameter of the core end is reduced at the time of extraction. Thus, it is possible to avoid a gap between the outer periphery of the core and the inner periphery of the cylindrical bobbin so that the inner periphery of the cylindrical bobbin and the core are slid significantly. Therefore, even when the air-core coil is formed around the cylindrical bobbin, the winding machine and the air-core coil manufacturing method of the present invention can remove the coil from the core without damaging the wire film. It can be removed relatively easily.

  In the case where the air core coil is formed around the cylindrical bobbin, one end edge of the cylindrical bobbin enters the gap between the first guide member and the winding core, and the other end of the cylindrical bobbin. By causing the edge to enter the gap between the second guide member and the core, the wire can be wound around a desired range on the outer periphery of the cylindrical bobbin. If the second guide member is detached from the tip of the core and one end edge of the cylindrical bobbin is extracted from the gap between the first guide member and the core, the air-core coil can be more easily Can be removed from the core.

It is a longitudinal cross-sectional view which shows the state by which the wire was wound between the 1st guide member of the cylindrical bobbin inserted by the winding core of this invention embodiment, and the 2nd guide member. It is sectional drawing corresponding to FIG. 1 which shows the state which the 2nd guide member spaced apart from the winding core. It is a perspective view which shows the state by which the wire was wound around the cylindrical bobbin. It is CC sectional view taken on the line of FIG. FIG. 10 is a sectional view taken along line AA in FIG. 9. It is the figure seen from the D direction of FIG. It is an enlarged view of the F section of FIG. FIG. 10 is a sectional view taken along line B-B in FIG. 9. It is a top view of the winding machine of an embodiment of the present invention.

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

  4 to 9 show a winding machine 10 of the present invention. In each figure, 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 vertical direction. The configuration of will be described. The winding machine 10 includes a cylindrical core 12 provided in a base 11 made of a rectangular body so as to project upward from the upper plate 11a in the Z-axis direction, and an operation slidably inserted through the core 12. And a bar 13. As shown in FIGS. 3 and 7, a plurality of slits 12a (three slits 12a in this embodiment) extending in the axial direction at predetermined intervals in the circumferential direction are formed at the tip of the core 12; The slit 12 a divides the tip end of the core 12 into a plurality of portions in the circumferential direction, and a plurality of divided pieces 12 b divided into three in this embodiment by the slit 12 a are provided at the tip of the core 12. And the front-end | tip of the core 12 is comprised so that the outer diameter can be expanded or reduced by expanding or contracting the space | interval of the some division | segmentation piece 12b.

  As shown in FIGS. 1 to 3, a truncated cone-shaped operation piece 13 a is provided at the tip of the operation rod 13 slidably inserted into the winding core 12. This operation piece 13a has a truncated cone shape whose outer diameter increases upward, and its diameter increases upward even on the inner periphery of the distal end portion of the core 12 composed of a plurality of divided pieces 12b. It is formed in a conical shape. The inner circumference of the tip of the core 12 having the conical shape and the outer diameter of the operation piece 13a are formed to be substantially equal, and as shown in FIG. 2, the operation piece 13a is provided at the center of the plurality of divided pieces 12b at the tip of the core 12. Is entered from above and the periphery thereof contacts the inner periphery of the core 12, and then further enters the lower direction in the Z-axis direction as indicated by the solid arrow, thereby expanding the outer diameter of the tip of the core 12. Is done. On the other hand, since the plurality of divided pieces 12b are formed by the slits 12a formed at the front end of the core 12, the operation piece 13a is located above the front end of the core 12 as indicated by the broken line arrow in FIG. When the core 12 is detached, the expanded outer diameter of the core 12 is reduced by the elasticity of the core 12.

  As shown in FIG. 4, the winding machine 10 of the present invention includes a winding core lifting mechanism 20 configured to be capable of moving the winding core 12 up and down, and an operating piece 13 by moving the operating rod 13 with respect to the winding core 12. An operation rod moving mechanism 30 that causes 13a to enter or leave the center of the plurality of divided pieces 12b, and a core rotation drive mechanism that rotates the core 12 together with the operation rod 13 to wind a wire around the outer periphery of the core 12. 40.

  The core raising / lowering mechanism 20 includes a core raising / lowering motor 21, a ball screw 22 connected to the rotation shaft 21 a of the motor 21, an elevating member 23 screwed to the ball screw 22, and a lower end of the core 12. An extension tube 24 provided coaxially with the winding core 12 and pivotally supported by the elevating member 23 is provided. On the upper plate 11 a of the base 11, a support plate 14 parallel to the upper plate 11 a is provided inside the base 11 via a column 16. The core raising / lowering motor 21 is provided on the support plate 14 with the rotating shaft 21a vertical. The ball screw 22 connected to the rotating shaft 21a is screwed to the elevating plate 23a in the elevating member 23. In addition to the elevating plate 23a, the elevating member 23 is erected on the elevating plate 23a coaxially with the core 12. It has a cylindrical member 23b that penetrates the upper plate 11a. A circular flange portion 12 c is formed at the lower end of the core 12, and a large diameter portion 24 a that overlaps with the flange portion 12 c is formed at the upper end of the extension pipe 24. In addition to the large-diameter portion 24a, the extension tube 24 has a pivot-supporting tube portion 24b that is coaxial with the large-diameter portion 24a and pivotally supported through the cylindrical member 23b.

  The pivotal support tube part 24b is pivotally supported so as not to move in the axial direction with respect to the cylindrical member 23b, and the large diameter part 24a is connected to the flange part 12c of the core 12 so that the pivotal support pipe part 24b is coaxial with the core 12. Is installed. And in this core raising / lowering mechanism 20, when the core raising / lowering motor 21 drives and the ball screw 22 connected with the rotating shaft 21a rotates, the raising / lowering member 23 screwed together with the ball screw 22 will be extended pipe | tube. The winding core 12 provided in the extension pipe 24 is moved up and down together with the upper and lower portions 24. The upper plate 11a of the base 11 is provided with a surrounding member 17 that surrounds the cylindrical member 23b that penetrates the upper plate 11a and protrudes upward in the Z-axis direction.

  The operating rod moving mechanism 30 includes an operating motor 32 attached below the lifting plate 23a via a mounting bracket 31 that extends from the lifting plate 23a in the core lifting mechanism 20 and extends downward in the Z-axis direction, and the motor. A ball screw 33 coupled to the rotation shaft 32a of the rotation shaft 32, an operation member 34 screwed to the ball screw 33, and an extension pipe 24 penetrating in the axial direction. An extension rod 36 having an upper end connected and a lower end pivotally supported by the operation member 34 is provided. A guide rail 37 is provided on the vertical surface of the mounting bracket 31 to guide the operation member 34 in the vertical direction while surrounding the ball screw 33.

  In the operation rod moving mechanism 30 having such a configuration, when the operation motor 32 is driven and the ball screw 33 connected to the rotation shaft 32a rotates, the operation member 34 screwed to the ball screw 33 is provided. The extension rod 36 that is lifted and lowered and pivoted at the lower end of the operation member 34 is moved up and down together with the operation rod 13. Since the operating motor 32 is attached to the lifting plate 23 a that moves the core 12 up and down, the operating bar 13 moves in the vertical direction with respect to the core 12 and is provided at the tip of the operating bar 13. The operated piece 13a is caused to enter or leave the center of the plurality of divided pieces 12b at the tip of the core 12.

  The core rotation drive mechanism 40 is spline-coupled to the lower part of the extension pipe 24 that penetrates the cylinder member 23b from above and protrudes below the cylinder member 23b, and is not rotatable with respect to the extension pipe 24 and is axially And a rotary member 41 pivotally supported by the support plate 14, a first pulley 42 provided coaxially with the rotary member 41, and a rotary motor 43 attached to the support plate 14 (FIG. 5). ), A second pulley 44 provided on a rotation shaft 43a of the rotary motor 43, and a belt 46 provided between the first and second pulleys 42 and 44. In the core rotation driving mechanism 40 having such a configuration, when the rotation motor 43 is driven and the second pulley 44 rotates, the rotation is transmitted to the first pulley 42 via the belt 46, and together with the first pulley 42. The rotating member 41 rotates. The extension tube 24 splined to the rotating member 41 rotates with the core 12 so that the wire 18 (FIG. 1) can be wound around the outer periphery of the end of the core 12. Since the operating piece 13a enters the tip of the core 12, the operating bar 13 rotates together with the core 12, but the lower end of the extension bar 36 connected to the operating bar 13 is Although it is pivotally supported by the operating member 34, it is not hindered that the operating rod 13 rotates. Further, although the extension tube 24 is not rotatable with respect to the rotating member 41, it is spline-coupled and movable in the axial direction. Therefore, even when the core 12 is rotating, the core lifting mechanism The winding core 12 can be moved up and down by 20.

  As shown in FIGS. 8 and 9, the winding core 12 is fitted with a first guide member 51 that regulates one winding width of the wire 18 wound around the tip of the winding core 12. A second guide member 52 that regulates the other winding width of the wire 18 wound around the tip of the wire 18 is provided above the core 12. As shown in FIG. 9, a guide member movable machine 53 is provided on the base 11, and the movable machine 53 includes a main body 53a fixed to the base 11 and a pair of rails 53b provided on the upper surface of the main body 53a. And a movable base 53c that is movably provided by the rail 53b and provided with a second guide member 52 at the tip thereof, and an actuator 53d that can reciprocate the movable base 53c. The actuator 53d in this embodiment is a servo motor having a ball screw 53e connected to its rotating shaft, and the ball screw 53e is screwed to the movable base 53c. For this reason, when the servo motor which is the actuator 53d is driven to rotate the ball screw 53e, the movable base 53c moves along the rail 53b, and the second guide member 52 is moved to the first position above the core 12; It is configured to be able to reciprocate between second positions spaced from the first position. When the second guide member 52 is in the second position, the upper space of the core 12 is configured to be opened.

  As shown in FIG. 8, when the second guide member 52 is in the first position and the core 12 is raised by the core lifting mechanism 20, as shown in FIG. When the core 12 is lowered by the core lifting mechanism 20, the core 12 is detached from the second guide member 52 as shown in FIG. Configured. Returning to FIG. 8, the second guide member 52 is provided coaxially with a rotating shaft 54a extending in the vertical direction of the guide motor 54, and the guide motor 54 is attached to the movable base 53c. Then, as shown in FIG. 1, the edge of the cylindrical bobbin 19 inserted at the tip of the core 12 enters between the second guide member 52 and the core 12 in a state of being inserted into the core 12. A gap 52c is formed.

  Returning to FIG. 8, the first guide member 51 is continuously provided so as to overlap the flange portion 12 c of the winding core 12 at the lower end of the fitting cylindrical portion 51 a and the fitting cylindrical portion 51 a inserted into the winding core 12. And a fixing portion 51b fixed to the flange portion 12c. The upper edge of the insertion tube portion 51a of the first guide member 51 is a surface that regulates one winding width of the wire 18 wound around the tip end of the core 12, and as shown in FIG. In this case, a concave groove 51c into which the winding start and winding end of the wire 18 wound around the winding core 12 enters is formed extending in the tangential direction of the winding core 12. As shown in FIG. 1, a gap 51 d is formed between the first guide member 51 and the core 12 so that the edge of the cylindrical bobbin 19 fitted at the tip of the core 12 enters.

  A ring member 56 having the same diameter as that of the cylindrical bobbin 19 is inserted into the gap 51 d between the first guide member 51 and the core 12. The ring member 56 has a lower end of the ring member 56 integrally formed with a doughnut-shaped engaging portion 56a, and a coil spring 57, which is an elastic body whose upper end abuts against the lower surface of the engaging portion 56a. It is inserted between the member 51 and the core 12. A step portion 12d with which the lower end of the coil spring 57, which is an elastic body, contacts is formed around the core 12, and the coil spring 57 moves the ring member 56 upward through the locking portion 56a by the elastic force to be extended. Configured to be energized. As shown in FIG. 1, the edge of the cylindrical bobbin 19 enters the gap 51 d together with the ring member 56 against the urging force of the elastic body 57 with the second guide member 52 fitted in the tip of the core 12. As shown in FIG. 2, the elastic body 57 is configured to discharge the cylindrical bobbin 19 from the gap 51 d via the ring member 56 when the second guide member 52 is detached from the tip of the core 12. .

  As shown in FIG. 8, a horizontal disk 61 surrounding the fixing portion 51 b of the first guide member 51 is provided on the flange portion 12 c of the winding core 12 coaxially with the winding core 12. A gripping tool 62 for gripping the wire rod 18 at the beginning of winding and the wire rod 18 at the end of winding are locked around the disk 61 positioned on the extension of the concave groove 51 c formed on the upper edge of the first guide member 51. A locking tool 63 is provided. The gripping tool 62 is provided with an operation button 62a that protrudes downward from the gripping tool 62 so that the wire 18 gripped on the gripping tool 62 is released from the gripping tool 62, and a donut-shaped operation plate 64 that is operated to push up the operation button 62a. Is provided in parallel. A plurality of air cylinders 66 with protruding and retracting shafts 66a protruding vertically upward are embedded in the surrounding member 17 provided on the upper plate 11a, and an operation plate 64 is provided at the upper ends of the protruding and protruding shafts 66a of the plurality of air cylinders 66. Mounted. The operation plate 64 can be raised by projecting the projecting shafts 66 a of the plurality of air cylinders 66, and the raised operation plate 64 pushes up the operation button 62 a in the gripping tool 62 and is gripped by the gripping tool 62. The wire 18 is configured to be detached from the gripping tool 62.

  As shown in FIG. 9, the winding machine 10 includes a nozzle 71 that feeds the wire 18 from the tip adjacent to the core 12 in the X-axis direction, and a moving mechanism 72 that moves the nozzle 71 is provided. The moving mechanism 72 in this embodiment is a combination of biaxial drive units 72a and 72c, and includes a front-rear direction drive unit 72a and a vertical drive unit 72c. The drive units 72a and 72c are substantially the same drive mechanism along the drive directions X and Z. The vertical drive unit 72c is vertically fixed to the base 11, and a front / rear drive unit 72a extending in the X-axis direction is arranged to be movable in the vertical direction with respect to the vertical drive unit 72c. And the nozzle 71 is provided in the front-back direction drive part 72a so that a movement to the front-back direction drive part 72a is possible in the front-back direction. The nozzle 71 moving mechanism 72 is configured to be able to move the nozzle 71 in an arbitrary direction of the two axes of the X axis and the Z axis by a combination of the driving units 72a and 72c. Although not shown, the nozzle 71 is provided with a gripping mechanism for gripping the wire 18 fed from the nozzle 71 and a cutter for cutting the wire 18.

  The base 11 is provided with a hot air blower 81, and an air nozzle 81 a for blowing the hot air is movably provided on the hot air blower 81. The air nozzle 81a is configured to be able to move between a first position facing the tip end where the wire 18 of the core 12 is wound and a second position spaced from the tip end of the air nozzle 81a. When the air nozzle 81a is normally in the second position but the insulating film of the wire 18 wound around the tip of the core 12 is melted by heating and cooled and fixed, The hot air blower 81 is configured to move the air nozzle 81a from the second position to the first position as needed to blow hot air and melt and fix the insulating film of the wound wire 18.

  Next, the manufacturing method of the air-core coil which winds a wire using the said winding machine is demonstrated.

  This air-core coil manufacturing method expands the outer diameter of the tip by widening the distance between the plurality of split pieces 12b of the core 12 having a tip 12b divided into a plurality of pieces 12b divided in the circumferential direction. And a wire winding step of forming an air core coil comprising the wire 18 wound around the enlarged outer periphery of the core 12 at the tip of the core 12, and a plurality of divided pieces 12b. A core core diameter reducing step for reducing the outer diameter of the tip end of the core 12 on which the air core coil is formed by reducing the distance between them, and a coil extracting step for extracting the air core coil from the reduced outer periphery of the tip end of the core 12. Have.

  Here, the air-core coil may be formed around the cylindrical bobbin 19. In this case, a bobbin inserting step of inserting the cylindrical bobbin 19 into the tip of the core 12 whose tip outer diameter is reduced is performed before the core expanding step of expanding the tip outer diameter of the core 12. Then, the wire 18 is wound around the outer periphery of the cylindrical bobbin 19 in the wire winding process, and the air core coil is extracted together with the cylindrical bobbin 19 in the coil extraction process. In this embodiment, the case where an air-core coil is formed around the cylindrical bobbin 19 will be described, and each step in that case will be described below.

<Bobbin insertion process>
In this step, the cylindrical bobbin 19 is fitted into the tip of the core 12 whose tip outer diameter is reduced. In this embodiment using the winding machine 10 provided with the second guide member 52, the second guide member 52 is moved to the second position by driving the servo motor 53d in FIG. 9 and rotating the ball screw 53e. Then, the upper space of the core 12 is opened, and the cylindrical bobbin 19 (FIG. 1) is fitted into the tip of the core 12 whose upper side is open. Thereafter, the servo motor 53d is driven to rotate the ball screw 53e in the reverse direction, thereby positioning the second guide member 52 at the first position located above the core 12. And the core raising / lowering motor 21 in the core raising / lowering mechanism 20 is driven, the raising / lowering member 23 is raised with the extension pipe 24, and the 2nd guide member is provided at the front-end | tip of the core 12 provided in the extension pipe 24 and rising. 52 is inserted.

  Then, as shown in FIG. 1, the edge on the upper side of the cylindrical bobbin 19 enters the gap 52 c formed between the second guide member 52 and the core 12 while being fitted into the core 12. At the same time, since the second guide member 52 is fitted into the tip of the core 12, the second guide member 52 resists the urging force of the elastic body 57, and the cylindrical bobbin 19 fitted into the core 12 is connected to the ring member. 56, the lower edge of the cylindrical bobbin 19 enters the gap 51 d between the first guide member 51 and the core 12. That is, after the cylindrical bobbin 19 is fitted into the tip of the core 12 and before the wire 18 is wound, the first guide member 51 having one end of the cylindrical bobbin 19 fitted into the core 12 and The second guide member 52 is inserted into the front end side of the core 12 so that the other end edge of the cylindrical bobbin 19 is connected to the second guide member 52 and the core 12. To enter the gap 52c.

<Core expansion process>
In this step, the outer diameter of the tip is increased by increasing the interval between the plurality of divided pieces 12b of the core 12 having the divided pieces 12b divided into a plurality in the circumferential direction. To increase the outer diameter of the tip, the operating rod 13 is moved with respect to the core 12 by the operating rod moving mechanism 30, and the operating piece 13a provided at the tip of the operating rod 13 enters the center of the plurality of divided pieces 12b. Is done. Specifically, the operating motor 32 in the operating rod moving mechanism 30 is driven, the ball screw 33 connected to the rotating shaft 32a is rotated to lower the operating member 34, and the lower end of the operating member 34 is pivoted. The supported extension rod 36 is lowered together with the operation rod 13. Then, the operation piece 13a provided at the tip of the operation rod 13 enters the center of the plurality of divided pieces 12b at the tip of the core 12 from above, and its periphery comes into contact with the inner periphery of the core 12, as shown in FIG. As indicated by the solid line arrow, the outer diameter of the distal end of the core 12 is increased by further moving the operating piece 13a downward. Thus, by enlarging the outer diameter of the distal end of the core 12, the cylindrical bobbin 19 fitted to the distal end is supported from the inside, and the cylindrical bobbin 19 is prohibited from being displaced from the core 12. .

<Wire winding process>
In this step, an air core coil 90 (FIGS. 1 to 3) composed of the wire 18 wound around the enlarged outer periphery of the end of the core 12 is formed at the end of the core 12. In this embodiment, since the air-core coil 90 is formed around the cylindrical bobbin 19, the outer periphery of the cylindrical bobbin 19 between the first guide member 51 and the second guide member 52 in this wire winding process. The wire 18 is wound around. Specifically, the end of the wire 18 (FIG. 3) fed out from the nozzle 71 (FIG. 9) is gripped by one gripping tool 62 (FIG. 8) provided around the disk 61 as the wire 18 at the beginning of winding. Let As shown in FIG. 8, gripping by the gripping tool 62 is performed by raising the operation plate 64 by projecting the protruding and retracting shafts 66 a of the plurality of air cylinders 66 provided in the surrounding member 17, and holding the operation plate 64. When the operation button 62 a of the tool 62 is pushed up to release the gripping tool 62, the wire 18 fed from the nozzle 71 is inserted into the opened gripping tool 62, and then the operation plate 64 is lowered again to hold the gripping tool 62. The operation button 62 a is lowered, whereby the wire rod 18 fed out from the nozzle 71 is gripped by the gripping tool 62.

  Then, after guiding the wire 18 at the beginning of winding into a groove 51c (FIG. 3) formed in the upper edge of the first guide member 51, the rotary motor 43 of the core rotation drive mechanism 40 in FIGS. By driving, the rotation of the second pulley 44 is transmitted to the first pulley 42 via the belt 46, and the extension pipe 24 splined to the rotating member 41 is rotated together with the core 12. As a result, as shown in FIG. 3, the wire 18 fed from the tip of the nozzle 71 is wound around the outer periphery of the cylindrical bobbin 19 between the first guide member 51 and the second guide member 52. During this winding, the nozzle 71 is reciprocated in the Z-axis direction by the nozzle 71 moving mechanism 72 (FIG. 9), and the wire 18 is aligned and wound around the cylindrical bobbin 19. After winding the wire 18 a predetermined number of times, the wire 18 fed from the nozzle 71 is guided to the concave groove 51 c formed on the upper edge of the first guide member 51, and then the disc 61 is used as the wire 18 at the end of winding. Is locked to a locking tool 63 (FIG. 8) provided around the. In this manner, the wire 18 is wound around the cylindrical bobbin 19 to form the air-core coil 90 around the cylindrical bobbin 19.

  Here, when the insulating coating of the wire 18 is melted by heating and fixed by cooling, the air nozzle 81a in the hot air blower 81 shown in FIG. 9 is moved from the second position to the first position, Alternatively, hot air is blown onto the coil 90 (FIGS. 1 to 3) that has already been formed, and the insulating film of the wire 18 is melted and bonded to bond the wire 18 to each other, and the coil 90 is bonded to the bobbin 14 and aligned. It prevents that the shape of the coil 90 which consists of the wound wire 18 collapses after that. The air nozzle 81a is moved again from the first position to the second position after the coil 90 is formed.

<Core diameter reduction process>
In this step, the outer diameter of the tip of the core 12 on which the air-core coil 90 is formed is reduced by reducing the interval between the plurality of divided pieces 12b. To reduce the outer diameter of the tip, the operating rod 13 is moved with respect to the core 12 by the operating rod moving mechanism 30, and the operating piece 13a provided at the tip of the operating rod 13 is moved upward as shown by the broken line in FIG. It is done by moving to. Specifically, the operating motor 32 in the operating rod moving mechanism 30 in FIG. 4 is driven, the ball screw connected to the rotating shaft is rotated to raise the operating member 34, and the operating member 34 has a lower end. The pivoted extension rod 36 is raised together with the operation rod 13. Then, the operation piece 13 a provided at the tip of the operation rod 13 moves upward as shown by the broken line in FIG. 2 from the state of entering the tip of the core 12, and the operation piece 13 a due to the elasticity of the core 12. When the detachment is upward from the tip of the core 12, the enlarged outer diameter of the core 12 is reduced.

<Coil extraction process>
In this step, the air core coil 90 is extracted from the outer periphery of the reduced end of the core 12. In this embodiment in which the air core coil 90 is formed around the cylindrical bobbin 19, the air core coil 90 is extracted together with the cylindrical bobbin 19 in this coil extraction step. Specifically, the core raising / lowering motor 21 in the core raising / lowering mechanism 20 of FIG. 4 is driven, and the elevating member 23 screwed to the ball screw 22 connected to the rotating shaft 21a is lowered together with the extension pipe 24. Then, the second guide member 52 is detached from the tip of the core 12 that is provided on the extension pipe 24 and descends. When the second guide member 52 is detached from the core 12, the elastic body 57 shown in FIG. 1 provided between the first guide member 51 and the core 12 passes the ring bobbin 19 between the cylindrical bobbin 19 and the gap therebetween. To discharge from. Then, the servo motor 53d in the guide member movable machine 53 shown in FIG. 9 is driven to rotate the ball screw 53e, so that the space above the core 12 is opened with the second guide member 52 in the second position.

  On the other hand, the operation shaft 64 is raised by projecting the protruding and retracting shafts 66a of the plurality of air cylinders 66 provided on the surrounding member 17 shown in FIG. 8, and the operation button 62a of the gripping tool 62 is pushed up by the raised operation plate 64. Then, the wire 18 at the beginning of winding that has been gripped by the gripping tool 62 is removed from the gripping tool 62. At the same time, the wire 18 that is the end of winding of the coil and is locked to the locking tool 63 is gripped by a gripping mechanism (not shown) provided in the vicinity of the nozzle 71, and the wire rod between the gripping mechanism and the locking tool 63. 18 is cut by a cutter (not shown). Thereafter, the air core coil 90 formed around the cylindrical bobbin 19 is moved together with the cylindrical bobbin 19 to the space above the core 12 and removed from the core 12. Thereby, the air-core coil 90 which consists of the wire 18 wound around the cylindrical bobbin 19 can be obtained.

  As described above, according to the present invention, the wire rod wound around the core 12 is wound around the core 12 by applying a predetermined tension to the wire 18 during winding of the coil wire 18. When the coil 90 composed of 18 is removed from the core 12, the outer diameter of the tip around which the wire 18 of the core 12 is wound is reduced. In this embodiment in which the air core coil 90 is formed around the cylindrical bobbin 19, the air core coil 90 is extracted together with the cylindrical bobbin 19. By reducing the diameter, a gap is generated between the outer periphery of the core 12 and the inner periphery of the cylindrical bobbin 19. Thereby, it is avoided that the inner periphery of the cylindrical bobbin 19 and the core 12 are slid significantly. Therefore, the coil 90 can be removed from the core 12 relatively easily without damaging the film of the wire 18.

  Further, when the wire 18 is wound around the cylindrical bobbin 19, one end edge of the cylindrical bobbin 19 enters the gap 51 d between the first guide member 51 and the core 12, and the cylindrical shape By causing the other end edge of the bobbin 19 to enter the gap 52 c between the second guide member 52 and the core 12, the wire 18 can be wound around a desired range on the outer periphery of the cylindrical bobbin 19. Then, after winding the wire 18 around the cylindrical bobbin 19 to obtain the coil 90, when the second guide member 52 is detached from the tip of the core 12, the urging force of the elastic body 57 causes the cylindrical bobbin 19 to Since one end edge can be extracted from the gap 51d between the first guide member 51 and the core 12, the air-core coil 90 can be removed from the core 12 more easily.

  In the above-described embodiment, the case where the air-core coil 90 is formed around the cylindrical bobbin 19 has been described. However, the cylindrical bobbin 19 is made of a paper bobbin made of rolled paper or a resin. Examples thereof include a resin bobbin and a bobbin made of a nonmagnetic thin film. As the resin bobbin, for example, a resin bobbin 14 made of a polyimide film (trade name; Kapton) is preferable. On the other hand, the wire 18 may be directly wound around the core 12 without using the cylindrical bobbin 19, and the air-core coil 90 may be directly formed around the core 12. Even when the cylindrical bobbin 19 is not used in this way, when the air core coil 90 is removed from the core 12, the outer diameter of the core 12 and the coil are reduced by reducing the outer diameter of the core 12. A gap can be formed between the inner periphery of 90. Thus, when a gap is generated between the outer periphery of the core 12 and the inner periphery of the coil 90, the surface coating of the wire 18 on the inner periphery of the coil 90 and the core 12 are not slid during the removal. Then, the coil 90 can be removed from the core 12 relatively easily without damaging the coating of the wire 18.

DESCRIPTION OF SYMBOLS 10 Winding machine 12 Core 12b Dividing piece 13 Operation rod 13a Operation piece 18 Wire material 19 Cylindrical bobbin 30 Operation rod moving mechanism 40 Winding core rotation drive mechanism 51 1st guide member 51d Crevice 52 2nd guide member 52c Crevice 56 Ring member 57 Elastic body 90 Air core coil

Claims (5)

A cylindrical shape that has a divided piece (12b) divided into a plurality in the circumferential direction at the tip, and is capable of expanding or reducing the outer diameter of the tip by widening or shrinking the interval between the plurality of divided pieces (12b). No winding core (12),
A truncated cone shape that is slidably inserted into the core (12) and enters or leaves the center of the plurality of divided pieces (12b) to enlarge or reduce the outer diameter of the tip of the core (12). An operating rod (13) having an operating piece (13a);
An operating rod moving mechanism (30) for moving the operating rod (13) with respect to the core (12) to cause the operating piece (13a) to enter or leave the center of the plurality of divided pieces (12b); ,
A core rotation drive mechanism (40) for rotating the core (12) together with the operation rod (13) to wind the wire (18) around the outer periphery of the tip of the core (12) ,
A first guide member (51) that restricts one winding width of the wire (18) that is fitted into the winding core (12) and wound around the tip of the winding core (12);
A first one that restricts the other winding width of the wire (18) wound around the tip of the core (12) by being detachably fitted to the tip of the core (12). A winding machine provided with two guide members (52) . A cylindrical bobbin (19) fitted at the tip of the core (12) between the first guide member (51) and the core (12) and between the second guide member (52) and the core (12). The winding machine according to claim 1 , wherein gaps (51 d, 52 c) into which the end edges of the windings enter are formed. In the gap (51d) between the first guide member (51) and the core (12), a ring member (56) having the same diameter as the cylindrical bobbin (19), and an elastic force for biasing the ring member (56) Body (57) is inserted,
An edge of the cylindrical bobbin (19) together with the ring member (56) against the urging force of the elastic body (57) with the second guide member (52) fitted into the tip of the core (12) Enters the gap (51d), and the second guide member (52) is detached from the tip of the core (12), and the elastic body (57) is formed in the cylindrical shape via the ring member (56). The winding machine according to claim 2 , wherein the bobbin (19) is configured to be discharged from the gap (51d). A cylindrical bobbin (19) is fitted into the reduced tip of the core (12) having a tip (12b) divided into a plurality of pieces in the circumferential direction ,
One end of the cylindrical bobbin (19) is inserted into the gap (51d) between the first guide member (51) fitted into the core (12) and the core (12); A second guide member (52) is fitted on the front end side of the core (12), and the other end edge of the cylindrical bobbin (19) is connected to the second guide member (52) and the core (12). Enter the gap (52c) between
Expanding the distance between the plurality of divided pieces (12b) to increase the outer diameter of the tip,
A wire rod (18) is wound around the outer periphery of the cylindrical bobbin (19) between the first guide member (51) and the second guide member (52) fitted to the enlarged tip of the core (12). Turn the wire wound by the air-core coil made of (18) (90) is formed on the distal end of the winding core (12),
Reducing the distance between the plurality of divided pieces (12b) to reduce the outer diameter of the tip of the core (12) on which the air-core coil (90) is formed,
A method for producing an air-core coil, comprising: extracting the air-core coil (90 ) together with the cylindrical bobbin (19) from a reduced outer periphery of the winding core (12). After forming the air core coil (90) at the tip of the core (12) and before removing the air core coil (90) from the outer periphery of the tip of the core (12), the core (12) The second guide member (52) is detached from the tip, the cylindrical bobbin (19) is moved in the axial direction together with the air-core coil (90), and one end edge of the cylindrical bobbin (19) is moved to the first guide. The manufacturing method of the air core coil of Claim 4 with which extraction is carried out from the clearance gap (51d) between a member (51) and the said core (12).

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