JP6406521B2 - Holding method of conductor bundle - Google Patents

Description

  The present invention relates to a method for holding a conductor bundle for constituting a distributed winding coil.

  The coils used in the motor are roughly classified into a concentrated winding method and a distributed winding method when classified by a winding method. Among these, the distributed winding type coil is combined with the stator core such that the teeth of the stator core are inserted into each of the plurality of teeth insertion holes formed in the distributed winding coil. For example, Patent Document 1 discloses a method of manufacturing a stator using a distributed winding coil, and a method of forming a coil rod constituting a distributed winding coil using a plurality of flat conductors. Specifically, first, a rectangular conductor is edgewise bent into a ninety-nine fold to form a ninety-nine fold member, and a plurality of these ninety-nine fold members are wound in a spiral shape, A coil sub-assembly (conductor bundle) is formed. Further, a plurality of coil sub-assemblies are assembled to form a coil assembly, and the coil assemblies are aligned to form a coil cage.

JP 2013-070498 A

  Here, in the coil assembly aligning step described above, the coil assembly is aligned by inserting an inner arrow from the inner periphery side of the coil assembly and an outer arrow from the outer periphery side of the coil assembly into the tooth insertion hole of the coil assembly. The For this reason, each of the plurality of coil sub-assemblies needs to be shaped at the stage before assembly so that the inner arrow and the outer arrow can be inserted into the teeth insertion hole when the coil assemblies are assembled. In the invention of Patent Document 1, the coil sub-assembly is shaped using a dedicated shaping machine. However, as described above, the coil sub-assembly is formed by winding a ninety-nine fold member obtained by bending a flat conductor into a ninety-nine fold in a spiral shape in a stacked state. For this reason, the coil sub assembly tends to loosen due to the spring back of the flat conductor as soon as it is removed from the shaping machine. It will be a factor that hinders alignment. In addition, it is considered that the loosening of the coil sub-assies occurs more remarkably as the number of turns of the coil increases and the size of the coil decreases in order to improve the output of the stator. Accordingly, it has been demanded to hold the shaped coil sub-assembly (conductor bundle) so as not to cause loosening until it is assembled for forming the coil assembly.

  The present invention has been made in view of the above problems, and an object of the present invention is to hold a spiral conductor bundle for forming a distributed winding coil while suppressing the occurrence of winding looseness.

(Aspect of the Invention)
The following aspects of the present invention exemplify the configuration of the present invention, and will be described separately for easy understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention. Therefore, while considering the best mode for carrying out the invention, some of the constituent elements in each section are replaced, deleted, or further added with other constituent elements. It can be included in the range.

  (1) A method of holding a conductor bundle for forming a distributed winding coil, wherein the conductor bundle is formed by positioning a plurality of rectangular conductors edgewise bent into ninety-nine folds in the longitudinal direction. In a state where they are overlapped while being shifted, they are wound in a spiral shape so that a part of the outer periphery overlaps, and both ends of each of the plurality of flat rectangular conductors are projected in the spiral axial direction. All the one end portions of the plurality of flat conductors located on the inner peripheral side of the conductor bundle and all the other end portions of the plurality of flat conductors located on the outer peripheral side of the conductor bundle. Gripping means for gripping one end portions of the plurality of flat conductors positioned on the inner peripheral side of the conductor bundle are respectively gripped by two sets of gripping means having arc shapes corresponding to the shape. The closer to the edge, the closer to the spiral center And a gripping means for gripping the other end portions of the plurality of flat conductors positioned on the outer peripheral side of the conductor bundle so that the closer to the edge of the flat conductor, the closer to the spiral center. A gripping means for positioning and gripping one end portions of the plurality of flat conductors positioned on the inner peripheral side of the conductor bundle, and gripping the other end portions of the plurality of flat conductors positioned on the outer peripheral side of the conductor bundle. The relative positional relationship with the gripping means to be separated from the positional relationship between the one end and the other end at the time of completion of winding of the conductor bundle at least in the radial direction starting from the spiral center. A method for holding a conductor bundle to be held in a state of being held (claim 1).

  Since this invention was comprised in this way, it becomes possible to hold | maintain the spiral conductor bundle for comprising a distributed winding coil, suppressing generation | occurrence | production of winding looseness.

In the method for holding a conductor bundle according to an embodiment of the present invention, the position at which the conductor bundle is gripped by two sets of gripping means is shown, (a) is a diagram showing the conductor bundle from the plane direction, (b) is It is the figure shown from the front direction of the conductor bundle. (A) is a state in which the gripping position shown in FIG. 1 is gripped by two sets of gripping means, and (b) is a state in which the relative position of the two sets of gripping means is changed from the state in (a). It is illustrated from the plane direction of the bundle. It is a perspective view which shows the coil cage | basket formed using the several conductor bundle. It is a perspective view which shows the state which piled up the several flat conductor bent to the 99-fold shape. FIG. 5A is a plan view and FIG. 5B is a front view of a conductor bundle in which a plurality of flat conductors shown in FIG. 4 are spirally wound.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, the same portions are denoted by the same reference numerals throughout the drawings.
First, an example of a conductor bundle held by the conductor bundle holding method according to the embodiment of the present invention will be described with reference to FIGS. FIG. 3 shows an annular coil rod 40 used as a distributed winding coil. The coil rod 40 has a plurality of teeth insertion holes 42 for inserting teeth (not shown) of a stator core in an annular shape. It is provided radially starting from the center of. The coil rod 40 is constructed by assembling a plurality of conductor bundles 10 (see FIG. 5), and each of the conductor bundles 10 includes a plurality of flat rectangular conductors 12 (12a˜12) as shown in FIG. 12f) is formed from the conductor bundle 10 '. Each flat conductor 12 is a straight flat conductor that is edgewise bent into a ninety-nine fold shape. At this time, one end 14 and the other end 16 of each flat conductor 12 are shown in FIG. It is bent so as to protrude upward. Further, in the example of FIG. 4, six rectangular conductors 12 of the rectangular conductors 12a to 12f are stacked while sequentially shifting the position in the longitudinal direction, and one end portion 14 of the plurality of rectangular conductors 12 is a conductor bundle 10 ′. The other end portions 16 of the plurality of rectangular conductors 12 are arranged on the end edge 22 side of the conductor bundle 10 ′.

  And the conductor bundle 10 'comprised by the some rectangular conductor 12 is wound in a spiral shape so that a part of outer periphery may overlap, and the conductor bundle 10 as shown in FIG. 5 is formed. In the example of FIG. 5, one end portion 14 of each rectangular conductor 12 is disposed on the inner peripheral side of the conductor bundle 10, and the other end portion 16 of each rectangular conductor 12 is disposed on the outer peripheral side of the conductor bundle 10. It is wound clockwise from the inner peripheral side toward the outer peripheral side. Moreover, the one end part 14 and the other end part 16 of each rectangular conductor 12 protrude in the spiral axial direction, that is, the upward direction in FIG. The conductor bundle 10 is shaped from the state shown in FIG. 4 to the state shown in FIG. 5 using, for example, a dedicated shaping machine. Then, eight conductor bundles 10 in the state shown in FIG. 5 are assembled, and further, coil end processing or the like is performed to form a coil rod 40 shown in FIG.

  In addition, the conductor bundle 10 mentioned above is an example, and the holding method of the conductor bundle according to the embodiment of the present invention does not limit the conductor bundle 10 to be held. For example, the conductor bundle 10 may be formed of five or less or seven or more rectangular conductors 12, and is directed in a counterclockwise direction from one end 14 on the inner peripheral side to the other end 16 on the outer peripheral side. It may be wound around. Furthermore, for each of the rectangular conductors 12 constituting the conductor bundle 10, the thickness, the ratio of the short and long sides of the rectangular cross section, the length in a straight line, the number of ninety-nine folds, etc. are arbitrary.

  Next, a method for holding a conductor bundle according to the embodiment of the present invention will be specifically described with reference to FIGS. The conductor bundle 10 shown in FIG. 1 is in a state of being shaped by a dedicated shaping machine or the like, as in the case of the conductor bundle 10 of FIG. . In the method for holding a conductor bundle according to the embodiment of the present invention, the conductor bundle 10 in the state shown in FIG. 1 is held using two sets of gripping means 30 and 32. FIG. 1A shows a state in which the gripping means 30 and 32 are arranged in the vicinity of the conductor bundle 10 prior to gripping the conductor bundle 10 by the two sets of gripping means 30 and 32. In FIG. 1B, the range indicated by reference sign A indicates the grip position by the gripping means 30, and the range indicated by reference sign B indicates the grip position by the gripping means 32.

  As illustrated, each of the gripping means 30 and 32 has an arc shape corresponding to the spiral shape of the conductor bundle 10. One gripping means 30 radiates with a spiral center C as the starting point so as to sandwich the one end 14 in order to grip the one end 14 of the plurality of flat conductors 12 located on the inner peripheral side of the conductor bundle 10. It arrange | positions in the position of the inner side with respect to the one end part 14 of the direction, and the outer side. Furthermore, the gripping means 30 forms a spiral part of the conductor bundle 10 so as to approach the spiral center C of the conductor bundle 10 as it approaches the edge 20 of the conductor bundle 10. The one end portion 14 is inclined with respect to the arcuate arrangement. That is, in FIG. 1A, the gripping means 30 is arranged so that the end of the gripping means 30 on the end edge 20 side of the conductor bundle 10 approaches the spiral center C.

  The other gripping means 32 has a spiral center C so as to sandwich the other end 16 in order to grip the other end 16 of the plurality of flat conductors 12 located on the outer peripheral side of the conductor bundle 10. It arrange | positions in the radial direction used as the starting point in the proximity | contact position inside and outside with respect to the other end part 16. Furthermore, the gripping means 32 forms a spiral part of the conductor bundle 10 so as to approach the spiral center C of the conductor bundle 10 as it approaches the edge 22 of the conductor bundle 10. The other end portion 16 is inclined with respect to the arcuate arrangement. That is, in FIG. 1A, the gripping means 32 is arranged so that the end of the gripping means 32 on the end edge 22 side of the conductor bundle 10 approaches the spiral center C.

  Subsequently, the conductor bundle holding method according to the embodiment of the present invention includes a gripping means as shown in FIG. 2A in a state where two sets of gripping means 30 and 32 are arranged as shown in FIG. One end 14 of the plurality of flat conductors 12 is gripped by 30, and the other end 16 of the plurality of flat conductors 12 is gripped by the gripping means 32. Then, as can be confirmed in FIG. 2A, the arrangement of the one end portions 14 of the plurality of rectangular conductors 12 is slightly displaced along the holding surface of the holding means 30, and the inside of the conductor bundle 10. The peripheral edge 20 is displaced so as to approach the spiral center C. In addition, the arrangement of the other end portions 16 of the plurality of rectangular conductors 12 is slightly displaced along the gripping surface of the gripping means 32, and the edge 22 on the outer peripheral side of the conductor bundle 10 has a spiral shape. The state is displaced so as to approach the center C.

  Furthermore, the holding method of the conductor bundle according to the embodiment of the present invention is such that the holding means 30, 32 is changed from the state where the conductor bundle 10 is held by the two sets of holding means 30, 32 as shown in FIG. Change the relative positional relationship. Specifically, as shown in FIG. 2 (b), the relative positional relationship between the gripping means 30, 32 is separated in the radial direction starting from the spiral center C, and the spiral winding direction. Displacement in the direction of winding drawing along In the state of FIG. 2B, the gripping means 30 that grips the one end portions 14 of the plurality of flat conductors 12 positioned on the inner peripheral side of the conductor bundle 10 is spiral, as compared with the state of FIG. Is displaced in the counterclockwise direction along the direction of approaching the center C of the coil and along the spiral winding direction. The amount of displacement of the gripping means 30 in the counterclockwise direction along the spiral winding direction is smaller than the amount of displacement in the direction approaching the spiral center C. Further, the gripping means 32 for gripping the other end portions 16 of the plurality of flat conductors 12 positioned on the outer peripheral side of the conductor bundle 10 is a timepiece away from the spiral center C and along the spiral winding direction. It is displaced in the turning direction. The displacement amount of the gripping means 32 in the clockwise direction along the spiral winding direction is smaller than the displacement amount in the direction away from the spiral center C.

  Here, the method for holding the conductor bundle according to the embodiment of the present invention is sufficient if the relative positional relationship between the two sets of gripping means 30 and 32 is in the state shown in FIG. For this reason, the change in the relative position as described above may be realized by moving both of the two gripping means 30 and 32, or by moving either one of the gripping means 30 and 32. May be. That is, an appropriate gripping means to be moved may be selected according to the situation. The conductor bundle holding method according to the embodiment of the present invention finally holds the conductor bundle 10 in the state shown in FIG.

2A and 2B, for easy understanding, the displacement amount of the end edges 20 and 22 of the conductor bundle 10 when gripped by the gripping means 30 and 32, and the gripping means 30 and 32. The amount of movement of the gripping means 30 and 32 and the change in shape of the conductor bundle 10 when the relative position is changed are exaggerated from the actual one.
The gripping means 30 and 32 used in the conductor bundle holding method according to the embodiment of the present invention may use a chuck mechanism having, for example, two opposing arc-shaped gripping surfaces.

  Now, according to the embodiment of the present invention configured as described above, the following operational effects can be obtained. That is, the method for holding a conductor bundle according to the embodiment of the present invention is shown in FIG. 1 in which a spiral conductor bundle 10 formed as shown in FIG. 5 using a plurality of flat conductors 12 shown in FIG. As described above, the two holding means 30 and 32 having an arc shape corresponding to the spiral shape of the conductor bundle 10 are used for holding. Here, the spiral conductor bundle 10 is roughly divided into two directional component springs, a spiral winding direction of the rectangular conductor 12 constituting the spiral conductor and a radial direction starting from the spiral center. Influenced by back. Therefore, in the method for holding a conductor bundle according to the embodiment of the present invention, the conductor bundle is wound in a spiral shape so that a part of the outer periphery overlaps, and is located on the inner circumference side of the conductor bundle 10. All the one end portions 14 of the plurality of flat conductors 12 are gripped by one gripping means 30. Further, all the other end portions 16 of the plurality of flat conductors 12 positioned on the outer peripheral side of the conductor bundle 10 are gripped by the other gripping means 32.

  At this time, the gripping means 30 that grips the one end portions 14 of the plurality of flat conductors 12 positioned on the inner peripheral side of the conductor bundle 10 is closer to the spiral center C as the end edge 20 of the conductor bundle 10 is approached. To place. Further, the gripping means 32 for gripping the other end portions 16 of the plurality of flat conductors 12 positioned on the outer peripheral side of the conductor bundle 10 approaches the spiral center C as the other end edge 22 of the conductor bundle 10 is approached. Arrange to do. That is, each of the gripping means 30 and 32 having an arc shape is arranged in parallel to the one end portion 14 and the other end portion 16 of the plurality of rectangular conductors 12 arranged in an arc shape forming a part of a spiral shape. Instead, the gripping means 30 and 32 are inclined so that the end portion closer to the inner peripheral edge 20 or the outer peripheral edge 22 of the conductor bundle 10 approaches the spiral center C. To do.

  Then, as shown in FIG. 2A, the gripping means 30 arranged as described above grips the one end portions 14 of the plurality of flat conductors 12 positioned on the inner peripheral side of the conductor bundle 10, whereby the conductor bundle 10 On the other hand, it is possible to apply a force that brings the inner peripheral edge 20 of the conductor bundle 10 closer to the spiral center C. Similarly, by grasping the other end portions 16 of the plurality of flat conductors 12 positioned on the outer peripheral side of the conductor bundle 10 by the grasping means 32 arranged as described above, the conductor bundle 10 A force can be applied to bring the outer peripheral edge 22 closer to the spiral center C. As a result, the conductor bundle 10 is gripped with the one end portion 14 and the other end portion 16 of the plurality of rectangular conductors 12 while applying a slight force in the winding drawing direction. By this gripping state, the spring back of the flat conductor 12 acting in the radial direction starting from the spiral winding direction and the spiral center can be suppressed.

  Furthermore, in the method for holding the conductor bundle according to the embodiment of the present invention, as shown in FIG. 2B, the relative positional relationship between the two sets of gripping means 30 and 32 is determined so that the winding of the conductor bundle 10 is completed. With respect to the positional relationship between the one end portion 14 and the other end portion 16 of the plurality of flat conductors 12 at the time point, they are held in a state separated at least in the radial direction starting from the spiral center C. That is, the gripping means 30 that grips the one end portions 14 of the plurality of flat conductors 12 positioned on the inner peripheral side of the conductor bundle 10 approaches the spiral center C and / or on the outer peripheral side of the conductor bundle 10. One or both of the two gripping means 30 and 32 are displaced so that the gripping means 32 that grips the other end portions 16 of the plurality of flat conductors 12 positioned away from the spiral center C. At this time, the distance for separating the relative positions of the two sets of gripping means 30 and 32 includes the thickness of the flat conductor 12, the length of the flat conductor 12, the number of the flat conductors 12 included in the conductor bundle 10, and the spiral shape. Considering each parameter that affects the spring back of the flat conductor 12 such as the curvature of, the appropriate separation distance is set to balance with the spring back.

By holding the conductor bundle 10 in such a state, a direction that suppresses the influence of the spring back of the rectangular conductor 12 acting on the conductor bundle 10 in the radial direction starting from the spiral center C. You can apply power to. For this reason, as described above, the spiral conductor bundle 10 is held while suppressing the occurrence of winding looseness due to the synergistic effect of gripping by the gripping means 30 and 32 disposed to be inclined with respect to the conductor bundle 10. It becomes possible.
Furthermore, the method for holding the conductor bundle according to the embodiment of the present invention is such that the relative positional relationship between the two sets of gripping means 30 and 32 as shown in FIG. The present invention can be applied not only to hold the bundle 10 in a stationary state but also to transport the conductor bundle 10. In order to realize this, for example, two sets of gripping means 30 and 32 are arranged from the transfer start position to the end position of the conductor bundle 10 (for example, for forming the coil rod 40 from the shaping machine of the conductor bundle 10. It is only necessary to provide a mechanism for moving the device. Thereby, the conductor bundle 10 can be transported while suppressing the occurrence of winding looseness.

Further, as an application example of the method for holding a conductor bundle according to the embodiment of the present invention, in addition to the above-described configuration, “the relative positional relationship between the two sets of gripping means is determined by winding the conductor bundle. With respect to the positional relationship between the one end portion and the other end portion at the time of completion, they are separated in a radial direction starting from the spiral center and displaced in a winding stop direction along the spiral winding direction. A holding method of the conductor bundle to be held in a state of being held.
In this application example, the relative positional relationship between the two sets of gripping means 30 and 32 is set to be a spiral center C with respect to the positional relationship between the one end portion 14 and the other end portion 16 when the winding of the conductor bundle 10 is completed. Are spaced apart in the radial direction starting from, and displaced in the direction of squeezing along the spiral winding direction.

  For example, as shown in FIG. 2B, when the conductor bundle 10 is wound in the clockwise direction from the one end 14 on the inner peripheral side to the other end 16 on the outer peripheral side, The relative positional relationship between the pair of gripping means 30 and 32 is separated in the radial direction and displaced as follows. That is, the gripping means 30 for gripping the one end portions 14 of the plurality of flat conductors 12 positioned on the inner peripheral side of the conductor bundle 10 is displaced in the counterclockwise direction along the spiral winding direction, and / or The gripping means 32 that grips the other end portions 16 of the plurality of flat conductors 12 positioned on the outer peripheral side of the conductor bundle 10 is displaced in the clockwise direction along the spiral winding direction. By holding the conductor bundle 10 in the state as described above, it is possible to further apply a force in the winding drawing direction to the conductor bundle 10, thereby further suppressing the influence of the spring back of the plurality of rectangular conductors 12. In addition, loosening of the conductor bundle 10 can be suppressed.

  Here, in the state in which the relative positional relationship between the two sets of gripping means 30 and 32 is merely separated in the radial direction starting from the spiral center C, a plurality of rectangular conductors 12 constituting the conductor bundle 10 are provided. A slight force is applied in the direction in which the interval in the direction along the spiral is narrow. For this reason, not only by separating the relative positional relationship between the two sets of gripping means 30 and 32 in the radial direction, but also by displacing them in the direction of squeezing along the spiral winding direction as described above, A slight force is applied in the direction in which the spacing in the direction along the spiral shape between the plurality of flat conductors 12 is increased. Thereby, it is possible to suppress a force that changes the interval between the plurality of rectangular conductors 12, and it is possible to hold the conductor bundle 10 so that the relative position between the plurality of rectangular conductors 12 does not shift. .

Further, as a further application example of the method for holding a conductor bundle according to the embodiment of the present invention, in addition to the configuration of the first application example, “a plurality of rectangular conductors positioned on the outer peripheral side of the conductor bundle” The gripping means for gripping the end portion is displaced radially outward from the spiral center with respect to the position of the other end portion when the winding of the conductor bundle is completed, and the spiral winding is performed. A holding method of the conductor bundle to be held in a state where the conductor bundle is displaced in the direction of the outer peripheral side edge of the conductor bundle along the turning direction.
As in this application example, of the two sets of gripping means 30 and 32, only the gripping means 32 that grips the other end portions 16 of the plurality of flat conductors 12 positioned on the outer peripheral side of the conductor bundle 10 is used as the conductor bundle 10. The relative positional relationship between the two sets of gripping means 30 and 32 may be changed by displacing with respect to the position of the other end 16 at the time of completion of winding.

  In other words, the gripping means 32 for gripping the other end portions 16 of the plurality of flat conductors 12 is radiated from the spiral center C with respect to the position of the other end portion 16 when the winding of the conductor bundle 10 is completed. While displacing outside, it is displaced in the direction of the outer peripheral side edge 22 of the conductor bundle 10 along the spiral winding direction. For example, as shown in FIGS. 1 and 2, the displacement along the spiral winding direction causes the conductor bundle 10 to rotate clockwise from the inner end 14 toward the outer end 16. When wound in the direction, it is displaced in the clockwise direction, which is the direction of the outer peripheral edge 22 of the conductor bundle 10. Thus, by displacing only one gripping means 32 that grips the other end portion 16 of the plurality of flat conductors 12 among the two sets of gripping means 30 and 32, the influence of the spring back of the plurality of flat conductors 12 is affected. The force which suppresses is applied to the conductor bundle 10. Therefore, for example, even when there is a restriction on the movement of the gripping means 30 that grips the one end portions 14 of the plurality of flat conductors 12 positioned on the inner peripheral side of the conductor bundle 10, only the other gripping means 32 is attached. By displacing, the conductor bundle 10 can be held so as to suppress the occurrence of winding looseness.

As another application example of the method for holding a conductor bundle according to the embodiment of the present invention, in addition to the configuration of the first application example, “a plurality of rectangular conductors positioned on the inner peripheral side of the conductor bundle” The gripping means for gripping the one end is displaced radially inward from the spiral center with respect to the position of the one end when the winding of the conductor bundle is completed, and the spiral winding A holding method of the conductor bundle to be held in a state where the conductor bundle is displaced along the direction toward the inner peripheral edge of the conductor bundle.
As in this application example, of the two sets of gripping means 30 and 32, only the gripping means 30 that grips one end portion 14 of the plurality of flat conductors 12 positioned on the inner peripheral side of the conductor bundle 10 is used as the conductor bundle 10. The relative positional relationship between the two sets of gripping means 30 and 32 may be changed by displacing with respect to the position of the one end portion 14 at the time of completion of winding.

  That is, the gripping means 30 for gripping the one end portions 14 of the plurality of flat conductors 12 is directed radially inward from the spiral center C with respect to the position of the one end portion 14 when the winding of the conductor bundle 10 is completed. While being displaced, it is displaced in the direction of the inner peripheral edge 20 of the conductor bundle 10 along the spiral winding direction. For example, as shown in FIGS. 1 and 2, the displacement along the spiral winding direction causes the conductor bundle 10 to rotate clockwise from the inner end 14 toward the outer end 16. When wound in the direction, it is displaced in the counterclockwise direction, which is the direction of the inner peripheral edge 20 of the conductor bundle 10. Thus, by displacing only one gripping means 30 that grips one end portion 14 of the plurality of flat conductors 12 out of the two sets of gripping means 30 and 32, the influence of the spring back of the plurality of flat conductors 12 is affected. A force to suppress is applied to the conductor bundle 10. Therefore, for example, even when there is a restriction on the movement of the gripping means 32 that grips the other end portions 16 of the plurality of flat conductors 12 positioned on the outer peripheral side of the conductor bundle 10, only the other gripping means 30 is used. By displacing, the conductor bundle 10 can be held so as to suppress the occurrence of winding looseness.

10: conductor bundle, 12 (12a to 12f): flat conductor, 14: one end of a flat conductor, 16: other end of a flat conductor, 20, 22: edge of conductor bundle, 30, 32: gripping means (inside Circumference side), C: spiral center

Claims (1)

A method of holding a conductor bundle for constituting a distributed winding coil,
The conductor bundle is wound in a spiral shape such that a plurality of rectangular conductors edgewise bent into ninety-nine folds are stacked one after the other while shifting the position in the longitudinal direction. And both ends of each of the plurality of rectangular conductors are configured to protrude in the spiral axial direction,
All the one end portions of the plurality of flat conductors positioned on the inner peripheral side of the conductor bundle, and all the other end portions of the plurality of flat conductors positioned on the outer peripheral side of the conductor bundle are arranged in the spiral shape. Gripping means for gripping one end portions of the plurality of flat conductors located on the inner peripheral side of the conductor bundle, respectively, at the end of the rectangular conductor. The gripping means that is disposed so as to approach the spiral center as it approaches the edge and grips the other end portions of the plurality of flat conductors positioned on the outer peripheral side of the conductor bundle, The closer to the edge, the closer to the spiral center,
A gripping means for gripping one end portions of the plurality of flat conductors positioned on the inner peripheral side of the conductor bundle, and a gripping means for gripping the other end portions of the plurality of flat conductors positioned on the outer peripheral side of the conductor bundle. Relative to the positional relationship between the one end and the other end when the winding of the conductor bundle is completed, at least in a radial direction starting from the spiral center And holding the conductor bundle.

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