JP2010172108A - Coil insertion method and coil turnover device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil insertion method in which, when a plurality of parallel-wound lead wires are used for a rotary electric machine by being inserted into slots of a stator core, the copper loss becomes small owing to the uniformized current density of the stator core obtained by substantially uniformizing the inductances of the plurality of lead wires, so that the rotary electric machine has excellent performance, and to provide a coil turnover device used for the coil insertion method. <P>SOLUTION: Predetermined coils out of coils C of a plurality of poles wound in parallel by a winding device and dropped into a coil insertion jig 30 or a transfer jig are pinched by an outer chuck 22 and an inner mold 18, and returned back again to the coil insertion jig or the transfer jig after being pulled out from the coil insertion jig or the transfer jig, and turned upside down by rotating the outer chuck and the inner mold, thus coil insertion into the stator core is performed by the coil insertion device after the coils of some poles are turned over. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a coil insertion method for inserting a para-wound coil into a slot of a stator core via a coil insertion jig, and a coil reversing device used in the method.

  In a motor such as an electric vehicle, a large winding force is obtained by increasing the cross-sectional area of a conducting wire (also referred to as “electric wire” or “wire”) and flowing a large current. A stator core with a coil formed thereon is employed. In this stator core, a para wire is wound around a winding frame by a coil winding device to form a para wire coil, and this coil is dropped into a coil insertion jig or a transfer jig, and the operation is repeated to continuously connect a plurality of coils. When the transfer jig is used, the coil is further transferred to the coil insertion jig, and the multi-pole coil dropped into the coil insertion jig is inserted into the slot of the stator core. It is formed by.

  As a winding device that forms a coil by winding a para wire around a winding frame, the present applicant, as shown in Patent Document 1 below, wound a plurality of conductive wires around a flyer of the winding device in parallel. A bobbin is mounted, and a plurality of conductors are pulled out from the bobbin in parallel, and the flyer is rotated to form a coil by winding the plurality of conductors around a winding frame, and this coil is used as a coil receiving jig. We propose a para-winding device designed to be dropped.

  Further, in Patent Document 2 below, a winding frame, a guide roller that revolves around the winding frame, a stock ring that has a rotation axis concentric with the revolution axis of the guide roller, and a lower part of the winding frame The coil insertion jig is arranged in a wire, and a plurality of wires are wound around the stock ring in parallel. A plurality of wires are pulled out from the stock ring and wound around a winding frame through a guide roller to form a coil. A winding method and a winding device are disclosed in which the coil is dropped into a coil insertion jig.

On the other hand, Patent Document 3 below is a stator in which a waveform winding composed of a continuous coil in which a plurality of strands are bundled is arranged in a slot of a stator core, and the waveform winding is led out between the slots. A stator is disclosed in which a coil-shaped portion for transfer is provided at a coil end. According to this stator, it is possible to efficiently use the current density by suppressing the non-uniform current density depending on the position of the para-wound conducting wire, making the current density of the stator uniform, and reducing the current loss. It is said that a motor can be provided.
JP 2006-271118 A Japanese Patent No. 39899948 JP-A-8-182238

  The para-wound coil draws a loop with a plurality of conductors arranged in a line, and when it is held in the coil insertion jig or transfer jig in that arrangement, it is held in the coil insertion jig If it is held in the transfer jig as it is, it is transferred to the coil insertion jig, the stator core is assembled to the coil insertion jig, and inserted into the stator core slot by the stripper that moves inside the coil insertion jig. Is done.

  However, even in the stator manufactured by such a method, it has been found that copper loss occurs due to the non-uniform current density depending on the position of the conducting wire as described in Patent Document 3.

  That is, by the coil insertion operation, the plurality of conductors arranged in a row tend to be inserted into the slots in the arrangement order, and as a result, the position in the slot of the stator core depends on the arrangement order of the plurality of conductors. Are likely to be disposed on the outer diameter side, and those that are likely to be disposed on the inner diameter side, and the position in the slot is biased.

  On the other hand, it is known that the inductance of the conducting wire inserted into the slot varies depending on the radial position in the slot of the stator core. For this reason, in the stator core into which the above-mentioned para-wound coil is inserted, the inductance differs depending on a plurality of conductive wires, the current density is shifted, thereby generating a large amount of copper loss, leading to a decrease in the performance of the rotating electrical machine. I understood it.

  In the coil winding devices described in Patent Documents 1 and 2, no solution is taken for the above problems, and the performance of a rotating electrical machine having a stator core into which a para-wound coil is inserted is deteriorated. It was the cause.

  Moreover, although the technique in which the twist-shaped portion for dislocation is provided at the coil end described in Patent Document 3 can be applied to a stator that performs corrugated winding, a loop-shaped coil as disclosed in Patent Documents 1 and 2 This is not applicable to a type of stator in which a plurality of coils are formed and these coils are inserted into slots of the stator core.

  Therefore, an object of the present invention is to make the inductance of a plurality of conductors substantially uniform when a plurality of conductors wound in parallel are inserted into a slot of a stator core and used in a rotating electrical machine. It is an object of the present invention to provide a coil insertion method and a coil reversing device used in the method, in which the density is made uniform, the copper loss is reduced, and a rotary electric machine with excellent performance can be obtained.

In order to achieve the above object, the coil insertion method of the present invention is a method in which a coil wound in parallel by a winding device is dropped into a coil insertion jig or a transfer jig to continuously form a plurality of coils, In the case of using a tool, after the coil is further transferred to a coil insertion jig, a multi-pole coil dropped into the coil insertion jig is inserted into the stator core slot.
Pull out some of the coils of the plurality of poles dropped into the coil insertion jig or transfer jig from the coil insertion jig or transfer jig, turn the coil upside down, and again After returning to the coil insertion jig or the transfer jig, the subsequent steps are performed.

  According to the coil insertion method of the present invention, several coils out of a plurality of coils dropped into the coil insertion jig or the transfer jig are pulled out from the coil insertion jig or the transfer jig, and the coils are removed. By flipping it upside down and returning it to the coil insertion jig or the transfer jig again, the arrangement of the conductive wires of some of the coils having a plurality of poles is turned upside down. If a transfer jig is used in this state, the coil is further transferred to the coil insertion jig, and then the multi-pole coil dropped into the coil insertion jig is inserted into the slot of the stator core. Of the multi-pole coils wound continuously, some of the pole coils have a reversed arrangement of the conductors in the slots, so that the position deviation in the slots due to the para-wound conductors is corrected. In addition, the inductance of the plurality of conductors is substantially uniformed, the current density is uniformized, the copper loss is reduced, and a rotating electrical machine such as a motor having excellent performance can be obtained.

  In the coil winding method of the present invention, the coil having a plurality of poles is composed of a single-phase coil group wound continuously through a jumper wire, and every other pole or every plurality of poles of the coil group. It is preferable to perform the inversion operation. According to this, the inductance of a plurality of conducting wires is made more uniform, the current density is made uniform, the copper loss is reduced, and a rotating electrical machine with better performance can be obtained.

  In addition, the middle mold is inserted into the loop of the coil to be reversed, the middle mold is gripped by the outer chuck with the coil interposed therebetween, and the middle mold and the outer chuck are raised and pulled out from the coil insertion jig or transfer jig, The intermediate mold is set in a free state, the outer chuck is rotated, the coil is turned upside down, the middle mold and the outer chuck are lowered again, and the coil is returned to the coil insertion jig or transfer jig. preferable. According to this, it is possible to grip the coil with the middle mold and the outer chuck, pull out from the coil insertion jig or transfer jig, invert the coil, and return to the coil insertion jig or transfer jig again. Work can be done mechanically automated.

Further, the coil reversing device of the present invention is configured such that some of the multi-pole coils that are para-wound by the winding device and hooked on the coil insertion jig or the transfer jig are connected to the coil insertion jig or In the coil reversing device for pulling out from the transfer jig, turning the coil upside down and returning it to the coil insertion jig or transfer jig again,
A middle mold that is held in an openable / closable holder, moves up and down, and is inserted into a loop of a coil that performs reversal,
An outer chuck that is arranged outside the middle mold, moves up and down, grips the middle mold so that it can be opened and closed, and rotates so as to be turned upside down while gripping the middle mold and the middle mold is released from the holder. It is characterized by having.

  According to the coil reversing device of the present invention, the middle mold held by the holder is inserted into the loop of the coil to be reversed, and the outer chuck disposed outside the middle mold is also lowered together, so that the middle mold and the outer chuck In this state, the middle mold is gripped by the outer chuck so that the coil is sandwiched between the outer chuck and the middle mold, and then the middle mold and the outer chuck are raised, and the sandwiched coil is inserted into the coil insertion jig. Or, pull out from the transfer jig, open the holder to release the middle mold from the holder, rotate the outer chuck to turn the middle mold and outer chuck upside down, lower the middle mold and outer chuck again, and insert the reversed coil into the coil Return to the jig or transfer jig, hold the middle mold again with the holder, open the outer chuck against the middle mold, release the coil, and turn over By leaving yl to return to the raised position by increasing the medium and outer chuck can hang pull again by reversing the pull Hung coils in the coil insertion jig or transfer jig. By repeating this operation a plurality of times, some of the multi-pole coils can be inverted. When the coil hooked on the transfer jig is reversed, the coil is transferred from the transfer jig to the coil insertion jig.

  In this way, the coil insertion jig can hold some of the multi-pole coils in an inverted state, and the coils can be continuously wound by inserting the coils into the slots of the stator core by the coil insertion device. Among the multi-pole coils, some of the pole coils have a reversed arrangement of the conductors in the slot, so that the position deviation in the slot due to the para-wound conductor is corrected, and the plurality of conductors Thus, the rotating electric machine such as a motor having excellent performance can be obtained.

  In the coil reversing device of the present invention, there is provided a presser plate for preventing coils other than the coil to be reversed from being pulled out of the coil insertion jig or transfer jig when the middle mold and the outer chuck are raised. It is preferable. According to this, since it is possible to prevent the coil other than the coil to be reversed from being pulled out by the presser plate, the coil reversing operation can be performed without any trouble.

  According to the present invention, some of the coils of a plurality of poles dropped into the coil insertion jig or transfer jig are pulled out from the coil insertion jig or transfer jig, turned upside down, and again coiled By returning to the insertion jig or transfer jig, the arrangement of the conductors of some of the coils of multiple poles can be turned upside down, so that when they are inserted into the slots of the stator core, they are wound continuously. Among the multi-pole coils, some of the pole coils have a reversed arrangement of the conductors in the slot, so that the position deviation in the slot due to the para-wound conductor is corrected, and the plurality of conductors As a result, the current density is made uniform, the copper loss is reduced, and a rotating electrical machine such as a motor with excellent performance can be obtained.

It is a front view which shows one Embodiment of the coil inversion apparatus by this invention. It is a partial expanded side view which shows the relationship between the middle mold | type of the inversion apparatus, its holder, and the holding plate of an outer side chuck. It is the elements on larger scale which show the relationship between the middle mold | type of the same inversion apparatus, the holding plate of an outer side chuck | zipper, and a coil. It is a front view which shows the state which lowered | lowered the raising / lowering frame of the same inversion apparatus, inserted the intermediate mold in the coil, and has arrange | positioned the outer side chuck | zipper outside the coil. FIG. 5 is a partially enlarged plan view in the state of FIG. 4. It is a partial enlarged side view which shows the state which closed the outer side chuck | zipper and clamped the coil between the middle mold | type and the holding plate. FIG. 7 is a partially enlarged plan view in the state of FIG. 6. It is a front view which shows the state which raised the raising / lowering flame | frame of the inversion apparatus, and extracted the coil which should be reversed from the coil insertion jig. Furthermore, it is a front view which shows the state which opened and lifted the clamp of the holder and released the middle mold | type from the holder. FIG. 10 is a partially enlarged side view in the state of FIG. 9. It is a front view which shows the state which rotated the outer side chuck | zipper of the inversion apparatus 180 degree | times, and reversed the coil. It is a partial expanded side view in the state of FIG. It is a front view which shows the state which lowered the raising / lowering frame of the inversion device again, and returned the inverted coil to the coil insertion jig. It is a front view which shows the state which lowered | hung the holder of the inversion device, closed the clamp, and hold | maintained the middle mold | type to the holder. It is a partial expanded side view in the state of FIG. It is the elements on larger scale which show the state which opened the outer side chuck | zipper of the inversion apparatus, and separated the holding | grip board from the intermediate mold. FIG. 17 is a partially enlarged plan view in the state of FIG. 16. It is a front view which shows the state which raised the raising / lowering frame of the reversing device again, left the coil in the coil insertion jig, and raised the middle mold and the outer chuck. It is a partial enlarged side view which shows the state which closed the outer side chuck | zipper of the same inversion apparatus and hold | maintained the middle mold | type with the holding | grip board. FIG. 20 is a partially enlarged plan view in the state of FIG. 19. It is a front view which shows the state which opened the clamp of the holder of the inversion device, raised it, and released the middle mold from the holder. It is the elements on larger scale in the state of FIG. It is a partial enlarged plan view which shows the state which rotated the outer side chuck | zipper and the intermediate mold | die in the reverse direction 180 degree | times last time. It is a front view which shows the state which lowered the holder of the inversion apparatus, closed the clamp, and hold | maintained the middle mold | type with the holder. It is a partial expanded side view in the state of FIG. It is a front view which shows the state which raised the presser plate of the coil in the inversion apparatus. FIG. 5 is a partially enlarged side view showing a state in which the outer chuck is opened and the gripping plate is separated from the middle mold in the reversing device. In the coil insertion method of the present invention, the para-winding coil wound by the winding device is held in the coil insertion jig as it is, and the coil is inverted and held every other pole. It is explanatory drawing which shows.

  In the coil insertion method of the present invention, when a coil that has been para-wound by a winding device is dropped into a coil insertion jig or a transfer jig to form a multi-pole coil continuously, and a transfer jig is used, In the method in which the coil is further transferred to the coil insertion jig, and then the multi-pole coil dropped into the coil insertion jig is inserted into the stator core slot by the coil insertion device. It is characterized in that some of the multiple-pole coils held by the tool are reversed. Therefore, since a well-known device can be used as the winding device and the coil insertion device other than the reversing device, description thereof will be omitted. As the winding device, for example, a device as described in Patent Document 1 or Patent Document 2 described above can be used, and as the coil insertion device, for example, described in Japanese Patent No. 3756362 by the present applicant. Known devices such as devices can be used.

  Next, the coil reversing device used for reversing the coil in the coil insertion method of the present invention will be described. 1 to 27 show an embodiment of a coil reversing device according to the present invention.

  As shown in FIG. 1, the reversing device 10 includes a support shaft 11 that moves up and down by a drive mechanism (not shown), and a lift frame 12 that is connected to a lower end portion of the support shaft 11. The elevating frame 12 is provided with a vertical frame 12a extending vertically and a horizontal frame 12b extending horizontally from the upper end portion of the vertical frame 12a.

  Referring also to FIG. 2, a first air cylinder 13 is attached to the front end of the horizontal frame 12b, and an operating rod 14a and a guide rod 14b of the first air cylinder 13 extend downward to support a plate. 14c. Accordingly, the operation of the first air cylinder 13 is guided by the guide rod 14b, so that the support plate 14c moves up and down.

  And the holder 15 in this invention is mounted | worn with this support plate 14c. The holder 15 includes a second air cylinder 16 attached to the support plate 14c and a pair of clamps 17 that are opened and closed by the operation of the second air cylinder 16, and the intermediate die 18 is held by the clamps 17 so as to be opened and closed. It is like that. The pair of clamps 17 has a pin 17a inside each.

  The middle mold 18 has a prismatic shape as a whole, and an engagement hole 19 into which the pin 17a of the clamp 17 is fitted is provided at the upper and lower ends thereof, and a guide recess 20 into which the clamp 17 enters is arranged at the periphery of the engagement hole 19. I am doing. Accordingly, the pair of clamps 17 enter the guide recesses 20 formed on the opposing surfaces of one end of the middle mold 18, respectively, and the pair of clamps 17 are closed in this state, and the pins 17 a are fitted into the engagement holes 19. Thus, the middle mold 18 is held by the holder 15 (see FIG. 1). On both shoulders of the upper and lower end portions of the middle mold 18, holding grooves 21 into which protrusions 29 provided on the upper and lower end portions of a gripping plate 28 described later enter are formed.

  As shown in FIGS. 4 and 5, the middle mold 18 is held by the holder 15, and the elevating frame 12 is lowered, so that the middle mold 18 is out of the coils C held by the blades 34 a and 34 b of the coil insertion jig 30. The coil C is inserted into the coil C to be reversed.

  On the other hand, an outer chuck 22 is attached to the lower end portion of the vertical frame 12a so as to sandwich the coil C with the middle mold 18. The outer chuck 22 has a support block 23 attached to the lower end portion of the vertical frame 12a, and a rotation drive device 24 attached to one end portion of the support block 23. A rotation shaft 25 of the rotation drive device 24 is A third air cylinder 26 is attached to the tip of the support block 23 through the horizontal direction. In this embodiment, a rotary actuator that operates by air pressure is used as the rotation drive device 24, but a servo motor or the like that can control the rotation position can also be used.

  Further, as shown in FIG. 3, the third air cylinder 26 is provided with a pair of opening / closing arms 27 that are opened and closed by the operation of the cylinder. Further, a grip plate 28 extending vertically is attached to the inside of the tip of the open / close arm 27. When the open / close arm 27 is closed, the middle die 18 is gripped by the grip plate 28. . The holding plate 28 is provided with projections 29 at the upper and lower ends thereof, and the projections 29 enter the holding grooves 21 of the middle mold 18 described above.

  Further, the length of the gripping plate 28 and the middle mold 18 is set to be longer than the upper and lower laminated width of the coil C hooked on the blades 34 a and 34 b of the coil insertion jig 30. That is, when the middle die 18 and the outer chuck 22 are lowered, the coil C is inserted between the middle die 18 and the gripping plate 28 of the outer chuck 22, and the gripping plate 28 of the outer chuck 22 is closed, the upper and lower ends of the gripping plate 28. The projecting portion 29 provided in the portion enters the holding groove 21 of the middle mold 18, and both side portions of the coil C are disposed between the projecting portions 29 at the upper and lower end portions of the gripping plate 28. It is configured to be sandwiched and held. In this case, it is preferable that a gap slightly smaller than one wire is formed between the middle mold 18 and the gripping plate 28, thereby preventing the arrangement of the para wires from being disturbed.

  The coil insertion jig 30 shown in FIG. 1 is a publicly known one having a structure similar to that described in, for example, the above-mentioned Japanese Patent No. 3756362. That is, the coil insertion device 30 includes a base 31, a cylindrical holder 32 standing on the base 31, a wedge guide 33 having a base fixed to the inner periphery of the cylindrical holder 32, and a wedge. A fixed blade 34a and a movable blade 34b are provided inside the guide 33.

  Then, for example, a multi-pole coil C formed by continuously winding a para wire by a winding device such as Patent Document 1 and Patent Document 2 is dropped into a corresponding gap between the blades 34a and 34b. Is retained.

  Further, on the outer periphery of the upper end of the blades 34a and 34b of the coil insertion jig 30, an arc-shaped presser plate 40 is disposed so as to be movable up and down. As shown in FIG. 3, the presser plate 40 has a circular arc shape in which a portion where the coil C to be reversed is mounted is cut out in plan view, and support bars 42 are connected to four circumferential directions thereof. Then, it is moved up and down via a support bar 42 by a drive mechanism (not shown).

  Next, an embodiment of a coil insertion method according to the present invention using the coil reversing device 10 will be described.

  As described above, the coil insertion jig 30 is provided with the multi-pole coil C formed by continuously winding the para wires by the winding device such as Patent Document 1 and Patent Document 2, for example. , 34b and are held in the corresponding gaps. The coil insertion jig 30 is installed on a turntable (not shown) and is rotated by a predetermined angle every time the reversing operation of one coil is completed.

  In the state shown in FIGS. 1 and 3, one coil C to be reversed among the coils C held by the coil insertion jig 30 is located below the middle mold 18 and the holding plate 28, and the notch of the presser plate 40 is provided. When arranged in the section 41, a coil reversing operation by the coil reversing device 10 is performed. At this time, the upper end of the middle mold 18 is held by the clamp 17 of the holder 15, and the gripping plate 28 of the outer chuck 22 is open to the middle mold 18.

  In this state, as shown in FIGS. 4 and 5, the elevating frame 12 is lowered, the middle die 18 is inserted into the coil to be reversed, and the grip plate 28 of the outer chuck 22 is disposed outside the coil.

  Next, as shown in FIGS. 6 and 7, the opening / closing arm 27 of the outer chuck 22 is closed by the operation of the third air cylinder 26, and the middle mold 18 is gripped by the gripping plate 28. At this time, the protrusions 29 provided at the upper and lower ends of the gripping plate 28 are held in the holding groove 21 of the middle mold 18, and both sides of the coil C are sandwiched between the middle mold 18 and the gripping plate 28. Thus, the coil C is held.

  Then, as shown in FIG. 8, the elevating frame 12 is raised, and the coil C held by the middle mold 18 and the outer chuck 22 is pulled out from the blades 34 a and 34 b of the coil insertion device 30. At this time, the coil C is pulled upward through the notch 41 (see FIG. 3) of the presser plate 40, and the other coils C are prevented from being pulled upward by the presser plate 40.

  Next, as shown in FIGS. 9 and 10, the clamp 17 is opened by the operation of the second air cylinder 16, the holder 15 is raised by the operation of the first air cylinder 13, and the middle mold 18 is released from the holder 15. At this time, since the middle mold 18 is held by the outer chuck 22, it does not fall.

  Next, as shown in FIGS. 11 and 12, by the operation of the rotation driving device 24, the outer chuck 22 rotates approximately 180 ° together with the middle mold 18, and the coil C held by the middle mold 18 and the outer chuck 22 moves up and down. Inverted.

  Then, as shown in FIG. 13, the lifting frame 12 is lowered again, and the inverted coil C is inserted into the gap between the predetermined blades 34 a and 34 b of the coil insertion jig 30 and is held by the coil insertion jig 30. The

  Next, as shown in FIGS. 14 and 15, the holder 15 is lowered by the operation of the first air cylinder 13, the clamp 17 is closed, and the upper end portion of the middle mold 18 is held by the holder 15 again.

  Next, as shown in FIGS. 16 and 17, by the operation of the third air cylinder 26, the open / close arm 27 is opened, the gripping plate 28 is opened, and the middle mold 18 is separated. At this time, since the middle mold 18 is held by the holder 15, it does not fall.

  Then, as shown in FIG. 18, the elevating frame 12 rises again, the coil C is extracted through the gap between the middle mold 18 and the holding plate 28, leaving the coil C in the coil insertion jig 30, and the middle mold 18. And the outer chuck 22 moves upward.

  This completes the reversal operation of one coil C. Therefore, if the rotation drive device 24 is a motor such as a pulse motor, the coil insertion jig 30 is rotated and the above operation is repeated to repeat the next coil. Although the reversal operation of C can be started, in this embodiment, since the rotary actuator operated by the air pressure is used as the rotation driving device 24, the following operation is further performed.

  That is, as shown in FIGS. 19 and 20, by the operation of the third air cylinder 26, the open / close arm 27 and the holding plate 28 are closed to hold the middle mold 18.

  Next, as shown in FIGS. 21 and 22, the clamp 17 of the holder 15 is opened by the operation of the second air cylinder 16, and the holder 15 is raised by the operation of the first air cylinder 13. As a result, the middle mold 18 is gripped by the outer chuck 22 and released from the holder 15.

  Further, as shown in FIG. 23, the rotary actuator constituting the rotary drive device 24 rotates 180 ° in the opposite direction to the previous time, and is returned to the initial state.

  24 and 25, the holder 15 is lowered by the operation of the first air cylinder 13, the clamp 17 is closed by the operation of the second air cylinder 16, and the upper end of the middle die 18 is clamped by the clamp 17. Is held again.

  Further, as shown in FIG. 26, the presser plate 40 is raised, and as shown in FIG. 27, the outer chuck 22 is opened, and the gripping plate 28 is separated from the middle mold 18.

  Thus, the initial state shown in FIGS. 1 and 3 is restored, so that the next coil C can be reversed by rotating the coil insertion jig 30 and repeating the above operation.

  In a preferred embodiment of the present invention, the reversing operation of the coil C is performed every other coil C of a plurality of poles wound continuously. Thereby, half of the coils C are inverted and the inverted coils C are evenly arranged in the circumferential direction.

  In the winding device, when the wound coil is dropped into the transfer jig, the coil reversing operation may be performed with each coil held by the transfer jig, or the truss The coil reversing operation may be performed in a state where the coil is transferred from the fur jig to the coil insertion jig.

  FIG. 28A schematically shows a state in which a total of eight coils are continuously wound by a winding device and are held by a coil insertion jig. That is, in this embodiment, the para wire is wound by 8 turns at each pole to form a coil, which is held in a predetermined gap of the blade of the coil insertion jig. Each coil is in a state where 1 to 8 turns are sequentially stacked from the bottom to the top, and the para wire of each turn is also stacked from the bottom to the top.

  In the conventional coil insertion method, the coil held in the coil insertion jig in the above state is inserted as it is into the stator core by the coil insertion device. 8 turns, and one lower turn enters the most opening side of the slot of the stator core. That is, the coil laminated on the upper side enters the back side of the slot of the stator core, and the coil laminated on the lower side enters the opening side of the slot of the stator core.

  This is also true for the arrangement of the para wires constituting each turn. Of the para wires, the one arranged above is arranged at the back side of the slot and arranged below at any turn. Things will be placed on the opening side of the slot on any turn. As a result, depending on the conductors that make up the para wires, there are those that are likely to be placed on the back side of the slot and those that are likely to be placed on the opening side, resulting in variations in the inductance of each lead wire, uneven current density, copper Loss increased, causing the performance of rotating electrical machines such as motors to deteriorate.

  According to the present invention, the state shown in FIG. 28B is obtained by inverting the coil for each pole while each coil is held by the coil insertion jig. That is, in this embodiment, the coils of the second, fourth, sixth, and eighth poles are inverted, and 8 turns are stacked at the lowermost end and 1 turn is stacked at the uppermost end. In addition, the arrangement of the para wires constituting each turn is turned upside down with respect to the first, third, fifth and seventh poles.

  As a result, regarding each conducting wire constituting the para wire, the conducting wires arranged downward in the first, third, fifth and seventh poles are arranged in the upper portion in the second, fourth, sixth and eighth poles. The conducting wires arranged upward in the third, fifth and seventh poles are arranged downward in the second, fourth, sixth and eighth poles. Thus, the tendency of the vertical arrangement by the conductors is averaged as a whole, which eliminates the deviation of the position in the slot when inserted into the slot of the stator core, and the inductance of each conductor. Variations can be reduced and the performance of a rotating electrical machine such as a motor can be improved.

  The coil reversal operation is not necessarily performed every other pole, and may be performed every two or more poles.

DESCRIPTION OF SYMBOLS 10 Coil reversing device 11 Support axis 12 Elevating frame 12a Vertical frame 12b Horizontal frame 13 1st air cylinder 14a Actuating rod 14b Guide rod 14c Support plate 15 Holder 16 2nd air cylinder 17 Clamp 17a Pin 18 Medium type 19 Engagement hole 20 Guide recessed part 21 Holding groove 22 Outer chuck 23 Support block 24 Rotation drive device 25 Rotating shaft 26 Third air cylinder 27 Opening / closing arm 28 Grip plate 29 Projection 30 Coil insertion jig 31 Substrate 32 Cylindrical holder 33 Wedge guide 34a Fixed blade 34b Movable blade 35 Stripper 40 Presser plate 41 Notch 42 Support rod C Coil

Claims (5)

When the coil wound in parallel by the winding device is dropped into a coil insertion jig or a transfer jig to form a multi-pole coil continuously, and the transfer jig is used, the coil is further inserted into the coil insertion jig. In the method of inserting the multi-pole coil dropped into the coil insertion jig into the slot of the stator core after being transferred to
Pull out some of the coils of the plurality of poles dropped into the coil insertion jig or transfer jig from the coil insertion jig or transfer jig, turn the coil upside down, and again A coil insertion method comprising performing the subsequent steps after returning to the coil insertion jig or the transfer jig.   The said multiple pole coil consists of a coil group of the one phase wound continuously via the crossover, and performs the said inversion operation for every other pole or every several poles of this coil group. Coil insertion method.   Insert the middle die into the loop of the coil to be reversed, hold the middle die with the outer chuck across the coil, raise the middle die and the outer chuck and pull out from the coil insertion jig or transfer jig, The outer chuck is rotated in a free state, the coil is turned upside down, the middle die and the outer chuck are lowered again, and the coil is returned to the coil insertion jig or transfer jig. 3. The coil insertion method according to 2. Some of the multi-pole coils that are para-wound by the winding device and hooked on the coil insertion jig or transfer jig are pulled out of the coil insertion jig or transfer jig, and the coils are moved up and down. In the coil reversing device for reversing and returning to the coil insertion jig or transfer jig again,
A middle mold that is held in an openable / closable holder, moves up and down, and is inserted into a loop of a coil that performs reversal,
An outer chuck that is arranged outside the middle mold, moves up and down, grips the middle mold so that it can be opened and closed, and rotates so as to be turned upside down while gripping the middle mold and the middle mold is released from the holder. A coil reversing device comprising:   The coil reversing device according to claim 4, further comprising a pressing plate that prevents a coil other than the coil to be reversed from being pulled out of the coil insertion jig or the transfer jig when the middle mold and the outer chuck are raised.