Abstract:
Disclosed is an edgewise wound coil manufacturing device for manufacturing an edgewise wound coil. The edgewise wound coil manufacturing device is provided with: a plurality of corners; a core having a recess formed between each pair of adjacent corners, and around which a flat wire is wrapped; a rotating part that forces the core to rotate around the central axis of the core; guide parts that hold the flat wire therebetween in the thickness direction, while guiding the flat wire in such a manner that the flat wire wraps around the core; a first moving part that forces at least one of the guide parts and the core to move in the approaching/receding direction of the other; and a controller that adjusts the amount that the first moving part moves such that the edgewise wound coil achieves the desired shape.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a National Stage of International Application No. PCT/JP2011/062945 filed Jun. 6, 2011, claiming priority based on Japanese Patent Application No. 2010-137580 filed Jun. 16, 2010, the contents of all of which are incorporated herein by reference in their entirety. 
     FIELD OF THE INVENTION 
     The present invention relates to an edgewise wound coil manufacturing device for manufacturing an edgewise wound coil. 
     BACKGROUND OF THE INVENTION 
     An edgewise wound coil formed by winding a flat wire is manufactured, for example, using a magnetic field coil manufacturing device disclosed in Patent Document 1. The manufacturing device disclosed in Patent Document 1 includes a core around which a flat wire is wound, a first driving part for rotating the core, a guide for guiding the flat wire when it is wound, a second driving part for pressing the guide against the core, a third driving part for moving the core or the guide in an axial direction of the core, and a base for movably supporting the first, second and third driving parts. According to this manufacturing device, the first driving part rotates the core, and the second driving part brings the guide into contact with the core. The flat wire is pressed against a surface of the core by the guide and the flat wire is wound around the core. Simultaneously, the third driving part moves the core or the guide in the axial direction of the core. Therefore, the flat wire is pressed against the surface of the core and in this state, the flat wire is helically wound. As a result, the edgewise wound coil formed by winding the flat wire in a cylindrical shape is manufactured. 
     An edgewise wound coil formed by winding the flat wire in a polygonal shape is also manufactured. To manufacture such an edgewise wound coil, a manufacturing method of a polygonal coil described in Patent Document 2 is employed, for example. The manufacturing method of Patent Document 2 uses a polygonal core, which has two opposed surfaces with recesses, and a pressure roller arranged to face the recesses of the core. The pressure roller is pressed against the core by a spring or a hydraulic system. 
     When the coil is formed, a thin conductor (flat wire) is wound around the core while being pressed by the pressure roller against the core. At this time, portions of the thin conductor that corresponds to the recesses are depressed toward the core, and depressed parts of the coil are formed. When the core is pulled out of the coil, an edgewise wound coil formed by winding the thin conductor in a polygonal shape is manufactured. In the manufacturing method of Patent Document 2, since the depressed parts of the coil cancel or compensate for swells of the coil, which are generated after the core is pulled out, a coil is manufactured in which its straight part between angle portions of the coil extends in a straight manner. 
     PRIOR ART DOCUMENT 
     Patent Document 
     
         
         Patent Document 1: Japanese Laid-Open Patent Publication No. 2006-269715 
         Patent Document 2: Japanese Laid-Open Patent Publication No. 58-173818 
       
    
     SUMMARY OF THE INVENTION 
     Problems that the Invention is to Solve 
     According to the manufacturing method of Patent Document 2, to cancel the swells of the straight part of the coil, the core is provided with the recesses, and the thin conductor is pressed against the core by the pressure roller such that the depressed parts are formed in the thin conductor along the recesses. The shape of the obtained coil follows the outside shape of the core. Hence, according to the manufacturing method of Patent Document 2, the shape of the obtained coil is determined by the shape of the core. However, since the material of the thin conductor slightly differs on a lot-by-lot basis, swell of the coil remains after the coil is pulled out in some cases, or the straight part is recessed because the swelling amount is small on the other hand in some cases. Hence, to manufacture a coil having a desired shape, it is necessary to change the depth of the recess in accordance with a factor of the material of the thin conductor when it is manufactured. Therefore, it is necessary to frequently replace the core. 
     Accordingly, it is an objective of the present invention to provide an edgewise wound coil manufacturing device capable of manufacturing a coil into a desired shape without frequently exchanging the coil. 
     Means for Solving the Problems 
     To achieve the foregoing object and in accordance with one aspect of the present invention, an edgewise wound coil manufacturing device for manufacturing an edgewise wound coil is provided. The edgewise wound coil manufacturing device includes a core, a rotating part, a guide part, a first moving part, and a controller. The core includes a plurality of angle portions and recesses each formed between each pair of the adjacent angle portions. A flat wire is wound around the core. The rotating part rotates the core around a center axis of the core. The guide part guides the flat wire such that the flat wire is wound along the core while sandwiching the flat wire in a thickness direction. The first moving part moves one of the guide part and the core in an approaching/receding direction with respect to the other one of the guide part and the core. The controller adjusts a moving amount of the first moving part such that the edgewise wound coil is formed into a desired shape. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view schematically showing an edgewise wound coil manufacturing device according to one embodiment of the present invention; 
         FIG. 2  is a block diagram schematically showing the electrical configuration of the edgewise wound coil manufacturing device shown in  FIG. 1 ; 
         FIG. 3(   a ) is a schematic diagram showing a state where a guide part is located on an angle portion of a core in the edgewise wound coil manufacturing device; 
         FIG. 3(   b ) is a schematic diagram showing a state where the guide part is located between the angle portion of the core and a deepest portion of a recess; 
         FIG. 3(   c ) is a schematic diagram showing a state where the guide part is located on the deepest portion of the recess of the core; 
         FIG. 4  is a perspective view showing an edgewise wound coil; and 
         FIG. 5  is a partial diagram showing a state where guide part sandwich a flat wire in its thickness direction in the edgewise wound coil manufacturing device shown in  FIG. 1 ; and 
         FIG. 6  is a perspective view schematically showing an edgewise wound coil manufacturing device according to an embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     One embodiment according to the present invention will now be described with reference to  FIGS. 1 to 5 . 
     As shown in  FIG. 1 , a flat wire C is a coated copper wire having a rectangular cross section. In the following description, a short side direction of a cross section of the flat wire C intersecting the longitudinal direction thereof is referred to as a thickness direction, and a long side direction of the flat wire C is referred to as a width direction. As shown in  FIG. 4 , an edgewise wound coil  50  is formed into a square tubular shape by helically winding the flat wire C such that it is superposed in the thickness direction while bending the flat wire C in the width direction. 
     As shown in  FIG. 1 , an edgewise wound coil manufacturing device  11  (simply, manufacturing device  11 , hereinafter) includes a rectangular plate-shaped base  12 , support legs  13  standing on four corners of the base  12 , and a support stage  14  supported on these support legs  13 . A table-servomotor  15  is provided on the base  12 . A table-ball screw  17  is connected to a drive shaft  15   a  of the table-servomotor  15  through a connection member  16 . The table-ball screw  17  is driven and rotated by the table-servomotor  15 . 
     The table-ball screw  17  supports a table  21  through a table-converting mechanism  20 . The table-converting mechanism  20  converts rotating motion of the table-ball screw  17  into straight motion of the table  21  along the axis of the table-ball screw  17 . The table-servomotor  15  can rotate in the forward and reverse directions. The table  21  can be ascended or descended (moved) by controlling rotating directions of the table-servomotor  15 . 
     An L-shaped support arm  22  is connected to a lower surface of the table  21 . The support arm  22  extends downward from the lower surface of the table  21  and then extends laterally in parallel to the table  21 . A core-servomotor  23  as a rotating part is mounted on a lower portion of the support arm  22 . A drive shaft  23   a  of the core-servomotor  23  projects from the core-servomotor  23  toward the table  21 . A rotary shaft  25  is connected to the drive shaft  23   a  through a connection member  24 . The rotary shaft  25  is driven and rotated by the core-servomotor  23 . The rotary shaft  25  is rotationally supported by a bearing  26 , which penetrates the table  21 . A core  27  is fixed to a distal end of the rotary shaft  25 . 
     The core  27  will be described. As shown in  FIGS. 1 and 3 , the core  27  is formed into a substantially square pillar shape. An extending direction of a center axis L of the core  27  is referred to as an axial direction of the core  27 . Four angle portions  27   a  of the core  27  are formed into obtuse angles. A recess  27   b  is formed in each of side surfaces of the core  27 . Each recess  27   b  is recessed from an adjacent pair of the angle portions  27   a  toward the center axis L of the core  27 . Each recess  27   b  has a maximum depth at a position corresponding to an intermediate point between the pair of adjacent angle portions  27   a . As shown in  FIG. 3(   c ), a straight line connecting end edges of the adjacent angle portions  27   a  to each other is defined as an imaginary line C 1 , and a straight line that intersects the imaginary line C 1  at right angles and passes through the center axis L is defined as a straight line C 2 . A length from the imaginary line C 1  to a deepest portion P of the recess  27   b  along the straight line C 2  is defined as a depth F of the recess  27   b.    
     As shown in  FIG. 1 , the core  27  is fixed to a distal end of the rotary shaft  25  such that the core  27  rotates around the center axis L. A through hole  14   a  is formed in the support stage  14 . The rotary shaft  25  extends the through hole  14   a . By controlling the rotating directions of the table-servomotor  15 , the core  27  can be ascended or descended along the center axis L through the table  21 . 
     A guide part-servomotor  30  is provided on the support stage  14 . A drive shaft  30   a  of the guide part-servomotor  30  projects from a side surface of the guide part-servomotor  30  toward the core  27 . A guide part-ball screw  32  is connected to the drive shaft  30   a  through a connection member  31 . The guide part-ball screw  32  is driven and rotated by the guide part-servomotor  30 . The guide part-ball screw  32  supports a support arm  34  through a guide part-converting mechanism  33 . The guide part-converting mechanism  33  converts rotating motion of the guide part-ball screw  32  into linear motion of the support arm  34  along the axis of the guide part-ball screw  32 . The guide part-servomotor  30  can rotate in the forward and reverse directions. By controlling rotating directions of the guide part-servomotor  30 , the support arm  34  can move in directions approaching and separating from the core  27 . 
     As shown in  FIG. 5 , a pair of support pieces  34   a  is provided on the distal end of the support arm  34  (on the side of core  27 ) such that the support pieces  34   a  are opposed to each other in the vertical direction at a distance from each other. The guide member  35  is supported by a support shaft  36  between the pair of support pieces  34   a . The guide member  35  is provided with a pair of disk-shaped guide plates  35   a , and the guide plates  35   a  guide the flat wire C in a sandwiching manner in the thickness direction. The guide plates  35   a  are opposed to each other at a distance from each other, and this distance is slightly greater than a thickness of the flat wire C. In this embodiment, the support arm  34 , the guide member  35  and the support shaft  36  form a guide part  37 . By controlling the rotating directions of the guide part-servomotor  30 , the guide part  37  (guide member  35 ) can move in directions in which the guide part  37  (guide member  35 ) and the core  27  approach and separate from each other (approaching/receding direction, hereinafter). In other words, the guide part  37  (guide member  35 ) can move relative to the rotating core  27 . In the following description, the direction in which the guide part  37  approaches the core  27  is referred to as a deep side, and the direction in which the guide part  37  separates from the core  27  is referred to as an opening side. 
     Hence, in this embodiment, the guide part-servomotor  30  constitutes a first moving part, which moves the guide part  37  in the approaching/receding direction. As the table  21  is ascended or descended by the table-servomotor  15 , the core  27  ascends or descends (moves) with respect to the guide part  37 . Hence, the table-servomotor  15  constitutes a second moving part, which ascends or descends (moves) the core  27  along the center axis L. 
     A bobbin (not shown), around which the flat wire C is wound, and a feeding device (not shown), which feeds the flat wire C from the bobbin to the core  27  of the manufacturing device  11 , are located in the vicinity of the manufacturing device  11 . 
     Next, an electrical configuration of the manufacturing device  11  will be described. As shown in  FIG. 2 , the manufacturing device  11  includes a controller  40 . The controller  40  includes a keyboard  40   k  for inputting various data by operator&#39;s operations, and a display  40   d , on which various information is displayed. Information that is input through the keyboard  40   k  is displayed on the display  40   d . The table-servomotor  15  is connected to the controller  40  through a table-servo amplifier  15   b , and the core-servomotor  23  is also connected to the controller  40  through a core-servo amplifier  23   b . The guide part-servomotor  30  is connected to the controller  40  through a guide part-servo amplifier  30   b . 
     Information concerning the flat wire C such as the material thereof and time during which the flat wire C has been wound around the bobbin (not shown) is input to the controller  40  through the keyboard  40   k . Further, information concerning the core  27  such as the length thereof in the axial direction and the depth F of the recess  27   b  is input to the controller  40  through the keyboard  40   k . The controller  40  controls the guide part-servo amplifier  30   b  based on the input information concerning the flat wire C and the core  27 , thereby controlling the operation of the guide part-servomotor  30 . As a result, the moving amount of the guide part  37  (guide member  35 ) with respect to the core  27  is controlled. By controlling the driving of the guide part-servomotor  30 , the guide member  35  can be moved in the approaching/receding direction. 
     The moving amount of the guide part  37  controlled by the controller  40  is set such that the flat wire C moves within a range smaller than the depth F of the recess  27   b . In other words, the moving amount of the guide part  37  toward the deep side of the recess  27   b  is set such that an end edge of the flat wire C does not come into contact with the deepest portion P of the recess  27   b  in the side surface of the core  27 . The moving amount of the guide part  37  toward the opening side of the recess  27   b  is set such that a linear part of the obtained edgewise wound coil  50  does not swell. Further, the moving amount of the guide part  37  is appropriately adjusted within a range smaller than the depth F of the recess  27   b  in accordance with material and the like of the flat wire C. For example, when a flat wire C made of material that does not spring back almost at all is used, the moving amount of the guide part  37  is set such that the guide part  37  does not press the flat wire C toward the deep side of the recess  27   b  almost at all. When a flat wire C made of material that largely springs back is used, the moving amount of the guide part  37  is set such that the guide part  37  largely presses the flat wire C toward the deep side of the recess  27   b.    
     By controlling the core-servo amplifier  23   b  based on information concerning the length of the core  27  in the axial direction, the controller  40  controls time during which the core-servomotor  23  is driven, i.e., time during which the core  27  is rotated. By controlling the table-servo amplifier  15   b  based on information concerning the length of the core  27  in the axial direction, the controller  40  controls time during which the table-servomotor  15  is operated, i.e., time during which the core  27  is ascended or descended. 
     Next, a manufacturing method of the edgewise wound coil  50  carried out by the manufacturing device  11  will be described. 
     Information concerning the core  27  such as the length of the core  27  in the axial direction, the depth F of the recess  27   b  and the angle of the angle portion  27   a , the length between the pair of adjacent angle portions  27   a  is input into the controller  40  beforehand. Information concerning the flat wire C such as material of the flat wire C and winding time of the flat wire C around the bobbin is input into the controller  40  beforehand. Before the manufacturing device  11  is driven, the table  21  is moved upward to a position that is the closest to the support stage  14 , and a lower end of the core  27  is located at a position opposed to the guide member  35 . 
     When the manufacturing device  11  is turned ON, the controller  40  drives the core-servomotor  23  such that the core  27  rotates at a predetermined rotation speed through control of the core-servo amplifier  23   b . The controller  40  drives the table-servomotor  15  such that the core  27  is moved downward at a predetermined lowering speed through control of the table-servo amplifier  15   b . The controller  40  operates the guide part-servomotor  30  such that the guide member  35  moves in the approaching/receding direction along an outside shape of the core  27  through control of the guide part-servo amplifier  30   b.    
     In other words, when the guide member  35  is opposed to the angle portion  27   a  of the core  27  as shown in  FIG. 3(   a ), the guide part  37  is moved by the guide part-servomotor  30  such that the flat wire C is bent along the angle portion  27   a . When the guide member  35  is opposed to the recess  27   b  as shown in  FIGS. 3(   b ) and  3 ( c ), the guide part  37  is moved by the guide part-servomotor  30  such that the flat wire C extends along the recess  27   b.    
     The controller  40  drives the guide part-servomotor  30  such that the guide member  35  moves by a predetermined moving amount with respect to the core  27  through control of the guide part-servo amplifier  30   b . This moving amount is set such that in the edgewise wound coil  50  obtained by pulling out the core  27 , the flat wire C of the linear part does not swell and a swelling amount is small and the linear part is not recessed. 
     The controller  40  counts time required from the instant when the winding operation of the flat wire C around the core  27  is started to the instant when the winding operation is completed. If the flat wire C is wound around the entire core  27  in the axial direction, the operations of the core-servomotor  23  and the table-servomotor  15  are stopped. Then, the flat wire C is wound around the core  27 , the edgewise wound coil  50  is manufactured. When the core  27  is removed, the edgewise wound coil  50  is obtained as shown in  FIG. 4 . 
     According to the above described embodiment, the following advantages are obtained. 
     (1) The edgewise wound coil manufacturing device  11  includes the guide part  37  for guiding the flat wire C such that the flat wire C is wound around the core  27 . The guide part  37  can approach and separate from the core  27  by controlling the operation of the guide part-servomotor  30 . The moving amount of the guide part  37  with respect to the core  27  can appropriately be varied by controlling driving of the guide part-servomotor  30  by the controller  40 . Therefore, when the moving amount of the guide part  37  with respect to the core  27  is adjusted in accordance with a slight difference or the like between materials of the flat wire C, it is possible to prevent the linear part from swelling or being recessed in the edgewise wound coil  50  after the core  27  is removed, and the edgewise wound coil  50  can be manufactured into a desired shape. Hence, to manufacture an edgewise wound coil  50  having a desired shape, it is unnecessary to frequently replace the core  27  in accordance with a factor of material and the like of a flat wire C to be used for manufacturing. 
     (2) According to the edgewise wound coil manufacturing device  11 , the core  27  can be rotationally supported by the table  21 , and the table  21  can be ascended or descended (moved) by the table-servomotor  15 . Hence, if the core  27  is driven along the center axis L by the table-servomotor  15  while rotating the core  27  by the core-servomotor  23 , it is possible to helically wind the flat wire C around the core  27  such that the flat wire C is superposed in the thickness direction, and it is possible to manufacture a square tubular edgewise wound coil  50 . 
     (3) According to the edgewise wound coil manufacturing device  11 , the moving amount of the guide part  37  with respect to the core  27  is adjusted so that the flat wire C is bent into a shape conforming to the outside shape of the core  27 . The moving amount of the guide part  37  is adjusted within the range smaller than the depth F of the recess  27   b . The moving amount of the guide part  37  can easily be controlled by driving the guide part-servomotor  30 , which is controlled by the controller  40 . Therefore, it is possible to manufacture the edgewise wound coil  50  into a desired shape easily without exchanging the core  27 . 
     (4) The guide member  35  of the guide part  37  guides the flat wire C in a state where the flat wire C is sandwiched in the thickness direction. Hence, it is possible to prevent an inner side (on the core  27  side) of the bent portion of the flat wire C from swelling, and to prevent the flat wire C from falling when the edgewise wound coil  50  is manufactured. 
     (5) The moving amount of the guide part  37  with respect to the core  27  is adjusted in the range smaller than the depth F of the recess  27   b . Hence, when the flat wire C is pressed toward the deep side of the recess  27   b , the flat wire C is not pressed against the core  27  over its entire circumference, and the edgewise wound coil  50  can be manufactured not based on the core  27 , but based on the guide part  37 . In other words, by controlling the moving amount of the guide part  37 , it is possible to manufacture the edgewise wound coil  50  into a desired shape without depending upon the shape of the core  27 . Hence, it is unnecessary to frequently replace the core  27  in accordance with material and the like of the flat wire C. 
     (6) According to the edgewise wound coil manufacturing device  11 , the core  27  is supported rotationally supported by the table  21 , and the table  21  can be ascended or descended (moved) by the table-servomotor  15 . When the edgewise wound coil  50  is manufactured, the guide part  37 , which is not ascended or descended (moved), winds the flat wire C around the core  27 , which is descended (moved) along the center axis L. Therefore, the flat wire C, which is guided by the guide part  37  is not moved up or down (varied) by the ascending or descending of the guide part  37  unlike the case where the ascending or descending guide part  37  winds the flat wire C around the core  27 , which does not ascend or descend. Hence, if a method of ascending or descending the core  27  along the center axis L is employed instead of vertically moving the guide part  37 , gaps between superposed flat wires C are not varied, and it is possible to accurately wind the flat wire C around the core  27 . 
     (7) The moving amount of the guide part  37  with respect to the core  27  is adjusted in accordance with the slight difference and the like of materials of the flat wire C. According to this adjustment, it is possible to prevent the linear part from swelling or from being recessed in the edgewise wound coil  50  after the core  27  is removed, and it is possible to manufacture the edgewise wound coil  50  into a desired shape. Therefore, it is possible to omit labor for straightening a swelled part of the obtained edgewise wound coil  50 . 
     (8) According to the edgewise wound coil manufacturing device  11 , the guide part  37  sandwiches the flat wire C, presses the flat wire C against the core  27  and in this state, the flat wire C is wound around the core  27 , and the edgewise wound coil  50  can be manufactured. In other words, since the guide part  37  (guide member  35 ) sandwiches the flat wire C, it is possible to prevent the flat wire C from falling or twisting in the thickness direction when the flat wire C is bent, and the guide part  37  can guide the flat wire C such that flat wire C is helically wound around the core  27  in its axial direction. Further, since the flat wire C is bent along the four angle portions  27   a , and wound and superposed in the axial direction of the core  27 , it is possible to adjust the moving amount of the guide part  37  with respect to the core  27 . In other words, according to the edgewise wound coil manufacturing device  11 , the flat wire C can be bent in a state where it is reeled up around the core  27 . Hence, the edgewise wound coil manufacturing device  11  does not have a problem that a manufacturing flow is interrupted due to a feeding operation of the flat wire C in contrast to a bender-type device in which a coil is manufactured by repetition of a feeding operation and a bending operation of the flat wire C. Hence, it is possible to shorten the manufacturing time as compared with a case where the edgewise wound coil  50  is manufactured by the bender-type device. 
     (9) According to the edgewise wound coil manufacturing device  11 , it is possible to bend flat wire C in a state where the flat wire C is reeled up around the core  27 . Therefore, since the feeding operation of the flat wire C as in the bender-type device is not included, vibration of flat wire C generated when the flat wire C is sent is eliminated, and it is possible to avoid a case where the flat wire C receives vibration and the flat wire C becomes large in the thickness direction, and a case where gaps between the superposed flat wires C are varied. 
     (10) By adjusting the moving amount of the guide part  37  with respect to the core  27 , the flat wire C is formed along the outside shape of the core  27  in a manner that the flat wire C is not pressed against the core  27  over its entire circumference. Hence, it is unnecessary to increase the rigidity of the guide member  35  and the core  27  as compared with a case where the flat wire C formed in a manner that it is pressed against the core  27  over its entire circumference. 
     (11) The moving amount of the guide part  37  with respect to the core  27  can be adjusted by controlling the operation of the guide part-servomotor  30  by the controller  40 . Hence, by adjusting the moving amount, it is possible to bend the flat wire C in accordance with the angles of the angle portions  27   a  of the core  27 . Therefore, it is possible to bend the flat wire C irrespective of a shape of the core  27 , and to easily manufacture a polygonal edgewise wound coil  50 . 
     (12) The core  27  includes the four angle portions  27   a  and recesses  27   b  between the pair of adjacent angle portions  27   a . In other words, each of the side surfaces of the core  27  is recessed inward of the core  27 . A portion of the flat wire C that is opposed to the recess  27   b  is pressed toward the recess  27   b . Therefore, even if the spring back of the flat wire C is generated after the core  27  is removed, deformation caused by the spring back is canceled by the deformation of the flat wire C caused by being pressed against the recess  27   b , the linear part of the edgewise wound coil  50  can be formed into a straight line, and a square tubular shape can be maintained. 
     The above described embodiment may be modified as follows. 
     In the above embodiment, the table  21  is ascended or descended (moved) by the table-servomotor  15 , the core  27 , which is rotationally supported by the table  21 , is ascended or descended (moved), thereby ascending or descending (moving) the core  27  with respect to the guide part  37  (guide member  35 ). Instead of this configuration, the core  27  may only be rotated without ascending or descending (moving) the core  27 , and the guide part  37  (guide member  35 ) may be ascended or descended (moved) with respect to the core  27 . In this case, the second moving part ascends or descends (moves) the guide part  37 . 
     In the above embodiment, the guide part  37  (guide member  35 ) is moved in the approaching/receding direction with respect to the core  27 . Instead of this configuration, the core  27  may be moved in the approaching/receding direction with respect to the guide part  37  (guide member  35 ) without moving the guide part  37  (guide member  35 ). In this case, for example as shown in  FIG. 6 , the first moving part moves the core  27  in the approaching/receding direction. 
     In the above embodiment, the guide part  37  (guide member  35 ) moves in the approaching/receding direction with respect to the core  27 . Instead of this configuration, the core  27  and the guide part  37  (guide member  35 ) may move in the approaching/receding direction with respect to each other. In this case, the first moving part moves both the core  27  and the guide part  37 . 
     In the above embodiment, the first moving part of the guide part  37  (guide member  35 ) is embodied as the guide part-servomotor  30 . Instead of this, it is possible to use a cam member that abuts against the base end surface of the support arm  34  in a state where the guide member  35  is supported by the distal end of the support arm  34  of the guide part  37 , and is rotationally supported by the table  21 . The guide member  35  may be moved in the approaching/receding direction through the support arm  34  by periodically abutting the cam member against the base end surface of the support arm  34  with rotation of the cam member. 
     Although the core  27  is of the square pillar shape in the above embodiment, the number of the angles may freely be changed as long as the core  27  is of the polygonal pillar shape. The core  27  may be of the polygonal tubular shape instead of the polygonal pillar shape. 
     Although the core  27  is of the square pillar shape in the above embodiment, the core  27  does not need to be of the pillar shape. For example, it is possible to use a core formed by rod-like members located at positions where the angle portions of an edgewise wound coil  50  to be manufactured are formed, and recesses formed between adjacent rod-like members. 
     Although the edgewise wound coil is of the square tubular shape formed by helically winding the flat wire C such that the flat wire C is superposed in the thickness direction in the above embodiment, the present invention can also be applied to an edgewise wound coil in which the flat wire C is only wound less than one turn. In this case, the second moving part, which moves one of the core  27  and the guide part  37  along the center axis L of the core  27 , is unnecessary.