Extraction device and method of segment coil

Abstract

To provide an extraction device of segment coils which can suppress deformation and flaws of the segment coils when the segment coils are extracted one by one.SOLUTION: An extraction device 1 of segment coils 9 extracts a plurality of segment coils 9 used for a stator of a rotary electric machine one by one for a subsequent process, and comprises: a holder 3 which holds the plurality of segment coils 9 so as to be sequentially extracted from an end; and an adsorption part 5 which adsorbs the segment coils 9 located at the end of the holder 3 to be moved to predetermined positions for the subsequent process.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a segment coil extraction device and method for extracting a plurality of segment coils used in a stator of a rotating electrical machine one by one for subsequent processing. [Background technology]

[0002] In the manufacture of stators for rotating electrical machines, for example, as disclosed in Patent Document 1, a predetermined number of segment coils are aligned in a circular shape on a stator core. The segment coils to be aligned are pushed out one by one from a stocker and aligned in a circular shape on a jig. The aligned segment coils are then pulled out of the jig and attached to the stator core.

[0003] In the manufacture of such stators, the segment coils are pushed out one by one from a stocker, which poses a problem in that the segment coils are prone to deformation and damage.

[0004] This problem is not limited to when aligning the segment coils, but also occurs when the segment coils are removed from the stocker for subsequent processing such as shape inspection. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-173357 Summary of the Invention [Problem to be solved by the invention]

[0006] The problem to be solved is that the segment coils are prone to deformation and damage when they are removed one by one. [Means for solving the problem]

[0007] The present invention provides a segment coil removal device that removes multiple segment coils used in the stator of a rotating electric machine one by one for subsequent processing, and includes a holding section that holds the multiple segment coils so that they can be removed sequentially from their ends, and an adsorption section that adsorbs the segment coil located at the end of the holding section and moves it to a predetermined position for the subsequent processing.

[0008] The present invention also provides a segment coil removal method for removing multiple segment coils used in the stator of a rotating electric machine one by one for subsequent processing, which method holds the multiple segment coils so that they can be removed sequentially from their ends, adsorbs the segment coil located at the end, and moves it to a predetermined position for the subsequent processing. [Effects of the Invention]

[0009] The present invention can prevent deformation or damage to the segment coils when they are removed one by one. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic perspective view showing a segment coil extracting device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of a suction unit used in the take-out device of FIG. [Figure 3] FIG. 3 is a schematic side view of the ejection device of FIG. [Figure 4] FIG. 4 is a plan view of the pusher shown in FIG. 3, with a portion thereof in section. [Figure 5] Figures 5(A) to (E) are schematic side views showing the operation of the removal device of Figure 1, with Figure 5(A) showing the initial state, Figure 5(B) showing when multiple segment coils are pressed, Figure 5(C) showing when the segment coils are removed, Figure 5(D) showing when the removed segment coils fall, and Figure 5(E) showing the initial state returned from Figure 5(D). [Figure 6]6(A) to 6(C) are schematic side views showing different adsorption states of the segment coil at the adsorption section in FIG. [Figure 7] FIG. 7 is an explanatory diagram of a segment coil alignment device to which the segment coil extraction device of FIG. 1 is applied. [Figure 8] FIG. 8 is a plan view showing a jig of the segment coil alignment device of FIG. [Figure 9] FIG. 9 is a perspective view from the front side showing a part of a segment coil extracting device according to Example 2 of the present invention. [Figure 10] 10(A) is a schematic side view of an adsorption part according to a comparative example that does not have the stopper of FIG. 9, and FIG. 10(B) is a schematic side view of an adsorption part according to Example 2 that has the stopper of FIG. [Figure 11] FIG. 11 is a plan view showing a part of a segment coil extracting device according to a third embodiment of the present invention. [Figure 12] 12 is a perspective side view showing a part of the ejection device of FIG. 11. FIG. [Figure 13] FIG. 13 is a schematic front view showing the swing of a segment coil according to a comparative example to Example 4 of the present invention. [Figure 14] FIG. 14 is a schematic front view showing a segment coil extracting device according to the fourth embodiment. [Figure 15] FIG. 15 is a schematic front view showing a segment coil extracting device according to a modified example of the fourth embodiment. [Figure 16] FIG. 16 is a schematic front view showing a segment coil extracting device according to a modified example of the fourth embodiment. [Figure 17] FIG. 17 is a schematic front view showing a segment coil extracting device according to a modified example of the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] The goal of preventing deformation and damage to the segment coils when they are removed one by one is achieved by removing the segment coils by suction.

[0012] The segment coil 9 removal device 1 removes multiple segment coils 9 used in the stators of rotating electrical machines one by one for subsequent processing. This removal device 1 comprises a holding unit 3 and an adsorption unit 5. The holding unit 3 holds multiple segment coils 9 so that they can be removed sequentially from their ends. The adsorption unit 5 adsorbs the segment coil 9 located at the end of the holding unit 3 and moves it to a predetermined position for subsequent processing. The type of subsequent processing can be any type, such as a segment coil alignment process or an inspection process.

[0013] The adsorption portion 5 may have adsorption surfaces 15a and 15b that adsorb at least one of the pair of legs 9a and 9b of the segment coil 9. In this case, the adsorption surfaces 15a and 15b are flat surfaces that abut the legs 9a and 9b of the segment coil 9, which are formed by bending a rectangular wire, when adsorbed.

[0014] The suction unit 5 may have a plurality of holes 17a, 17b, and 17c provided on the suction surfaces 15a and 15b, and may be configured to perform suction by suctioning air through the plurality of holes 17a, 17b, and 17c. However, the suction unit 5 only needs to be able to suction the segment coil 9, and may also be made of a sheet of electrorheological gel that generates an adhesive force when a voltage is applied.

[0015] The suction surfaces 15a and 15b may be provided on only one or both of the pair of legs 9a and 9b.

[0016] The spacing between the holes 17a, 17b, and 17c may be different for each of the adsorption surfaces 15a and 15b of the adsorption unit 5. Furthermore, the spacing between the holes 17a, 17b, and 17c may be varied in the direction along the leg on at least one of the adsorption surfaces 15a and 15b of the adsorption unit 5. Although the holes 17a, 17b, and 17c are formed with a uniform diameter, the diameter may be changed instead of or in addition to changing the spacing between the holes.

[0017] The holes 17a, 17b, and 17c may be divided into a plurality of blocks, and each block may perform independent air suction.

[0018] The attracting unit 5 may drop the attracted segment coil 9 at a predetermined position. In this case, it is preferable to provide a pressing unit 23a that presses down the upper end of the attracted segment coil 9 to encourage it to drop.

[0019] The adsorption portion 5 may include a retractable stopper 43 that prevents the adsorbed segment coil 9 from falling away from the adsorption surfaces 15a and 15b. The stopper 43 preferably retracts in conjunction with the pressing operation of the pressing portion 23a.

[0020] The take-out device 1 may include a pressing unit 7 that presses the plurality of segment coils 9 on the holding unit 3 toward the end of the holding unit 3. It is preferable that the pressing by the pressing unit 7 is stopped or released when the suction unit 5 that has adsorbed the segment coils 9 starts to move.

[0021] The take-out device 1 may include a pressing member 47 that presses the next segment coil 9 after the leading segment coil 9 of the plurality of segment coils 9.

[0022] Furthermore, the holding portion 3 may include guides 47, 49, and 51 that regulate the swinging of the segment coil 9.

[0023] The segment coil removal method involves holding multiple segment coils 9 so that they can be removed sequentially from the end, adsorbing the segment coil 9 located at the end, and moving it to a predetermined position for subsequent processing. In this way, multiple segment coils 9 used in the stator of a rotating electrical machine are removed one by one for subsequent processing. [Example]

[0024] [Ejecting device] Fig. 1 is a schematic perspective view showing a segment coil removal device according to Example 1. Fig. 2 is a perspective view of a suction unit used in the removal device of Fig. 1. Fig. 3 is a schematic side view of the removal device of Fig. 1. Fig. 4 is a plan view with a portion of the pusher shown in Fig. 3 in cross section.

[0025] As shown in Figure 1, the removal device 1 is an unloader used in the manufacturing process of a stator for a rotating electrical machine, and removes a plurality of segment coils 9 one by one for subsequent processing. The removal device 1 of this embodiment includes a holder 3 as a holding part, a suction part 5, and a pusher 7 as a pressing part.

[0026] The holder 3 holds multiple segment coils 9 so that they can be removed one after the other from their ends. The holder 3 holds multiple segment coils 9 together, regardless of the holding form. However, the suction part 5 holding the segment coils 9 moves so that the holder 3 does not interfere with the removal of the segment coils 9.

[0027] In this embodiment, each segment coil 9 is made by bending a cut wire made of rectangular wire into a U-shape, for example, a hairpin shape. Each segment coil 9 has a pair of legs 9a. The holder 3 has a bar 3a over which multiple segment coils 9 are hung.

[0028] The multiple segment coils 9 are arranged in a row on the holder 3 so that they can slide freely along the bar 3a. The holder 3 is positioned at an appropriate position relative to the suction unit 5 using a base or the like. The multiple segment coils 9 are separated from the holder 3 by the suction unit 5 and removed one by one from the end in the row direction.

[0029] The suction unit 5 suctions the segment coil 9 located at the end of the holder 3 and moves the suctioned segment coil 9 to a predetermined position for the subsequent alignment process. The alignment process is a process of aligning multiple segment coils 9 in a circular shape. The suction unit 5 is made up of, for example, a suction block, and is supported on a machine frame (not shown) so that it can move between a removal position and a release position.

[0030] The suction unit 5 may be moved by an appropriate actuator such as a cylinder device. In this embodiment, the direction of movement of the suction unit 5 is the direction in which the plurality of segment coils 9 are arranged on the holder 3.

[0031] The removal position is a position where one segment coil 9 can be sucked and removed from the end of the holder 3. In this embodiment, the removal position is adjacent to the end of the holder 3 and is a position where the legs 9a and 9b of the segment coil 9 located forward in the pressing direction among the multiple segment coils 7 pressed by the pusher 7 abut.

[0032] The release position is a position where one extracted segment coil 9 is released, and is a predetermined position for the alignment process. In this embodiment, at the release position, the segment coil 9 is dropped downward from the suction portion 23.

[0033] The dropped segment coils 9 are held by a jig for aligning them in a ring shape. Note that the dropped segment coils 9 may be aligned on a stator core instead of using a jig.

[0034] As shown in FIGS. 1 and 2, the adsorption portion 5 has a pair of adsorption surfaces 15a and 15b and a plurality of holes 17a, 17b, and 17c.

[0035] The pair of suction surfaces 15a and 15b respectively suction the pair of legs 9a and 9b of the segment coil 9. However, it is also possible to provide only one of the suction surfaces 15a and 15b. Therefore, it is sufficient for the suction surface to suction at least one of the pair of legs 9a and 9b. In this embodiment, the suction surfaces 15a and 15b are flat surfaces that abut against the segment coil 9, which is formed by bending a rectangular wire, when suctioned.

[0036] The adsorption surfaces 15a and 15b are formed at the tips of protrusions 5b that protrude independently in the thickness direction from the plate-shaped base 5a of the adsorption part 5. However, the adsorption surfaces 15a and 15b may also be configured as the same continuous flat surface or the like.

[0037] Holes 17a, 17b, and 17c are formed with the same diameter and are provided on suction surfaces 15a and 15b. Suction unit 5 suctions air through holes 17a, 17b, and 17c to suction and position legs 9a and 9b onto suction surfaces 15a and 15b.

[0038] These holes 17a, 17b, and 17c are divided into a plurality of blocks, three blocks in this embodiment, and air is sucked independently for each block.

[0039] The holes 17a of the first block are formed in the adsorption surface 15a, and the holes 17b and 17c of the second and third blocks are formed in the adsorption surface 15b. The holes 17a of the first block are arranged in a line above and below the adsorption surface 15a. The holes 17b and 17c of the second and third blocks are arranged in a line above and below the adsorption surface 15b.

[0040] Any or all of the holes 17a, 17b, and 17c in the first, second, and third blocks may be arranged in multiple rows. The number of arrangements of any or all of the holes 17a, 17b, and 17c in the first, second, and third blocks may be changed midway.

[0041] The spacing between holes 17a, 17b, and 17c of suction surfaces 15a and 15b of suction unit 5 is different. Hole 17a of the first block that sucks one leg 9a is formed at a wider spacing than holes 17b and 17c of the second and third blocks that suck the other leg 9b.

[0042] Furthermore, the spacing between holes 17b and 17c of the second and third blocks on suction surface 15b of suction unit 5 varies in the direction along the other leg 9b. Holes 17b of the second block are spaced apart at a narrower spacing than holes 17c of the third block, and holes 17c of the third block are spaced apart at a narrower spacing than holes 17a of the first block.

[0043] The number of holes 17b and 17c in the second and third blocks is greater than the number of holes 17a in the first block, depending on the spacing between them. Note that the relative arrangement range and number of holes 17a, 17b, and 17c in the first, second, and third blocks are arbitrary.

[0044] In this embodiment, the segment coil 9 is dropped at the release position and the leg 9b is inserted into the penetration part of the alignment device described later, so the configuration places relatively more emphasis on gripping and positioning at the suction surface 15b by the holes 17b and 17c on the leg 9b side.

[0045] A vacuum pump (not shown) is connected to each of the three blocks of the suction unit 5. By controlling these vacuum pumps, air is sucked through holes 17a, 17b, and 17c for each of the first, second, and third blocks. Holes 17a, 17b, and 17c can also be configured to suck air independently.

[0046] The holes 17a, 17b, and 17c can be freely set according to the specifications, and therefore the holes 17a, 17b, and 17c are not limited to being divided into three blocks, but can also be divided into other numbers of blocks.

[0047] 1 and 3, the pusher 7 presses the multiple segment coils 9 on the holder 3 toward the end of the holder 3 where the segment coils 9 are removed. In this embodiment, the pusher 7 is a block that can move along the bar 3a of the holder 3. The movement of the pusher 7 can be performed by an appropriate actuator such as a cylinder device.

[0048] The pusher 7 includes a main body 19 and a rod 21. The main body 19 has a tip 19a that can come into contact with the legs 9a and 9b of the segment coils 9 on the other end side of the multiple segment coils 9. The rod 21 is connected to an actuator such as a hydraulic cylinder, pneumatic cylinder, or solenoid. By controlling the actuator, the tip 19a of the main body 19 presses against the legs 9a and 9b of the segment coil 9.

[0049] As shown in FIG. 4, the main body 19 has a pair of abutment portions 19c attached to a base portion 19b to which the rod 21 is connected. The abutment portions 19c are formed of a cushioning material such as urethane resin, and prevent damage or deformation of the legs 9a and 9b due to excessive force being applied. The tip of the abutment portion 19c is the tip 19a, and its width is wider than the width of the legs 9a. However, the width of the abutment portion 19c may be the same as or narrower than the width of the legs 9a. It is preferable that the abutment portions 19c are attached so that they can be replaced.

[0050] The shape, pressing position, etc. of the pusher 7 are preferably set in accordance with the suction portion 5. Furthermore, the pressing load applied by the actuator to the pusher 7 is set to prevent deformation of the segment coil 9 in accordance with the shape, pressing position, etc. of the pusher 7. Furthermore, the pressing load of the pusher 7 may be variable in accordance with the number of segment coils 9 remaining in the holder 3.

[0051] [Removal method] Figures 5(A) to (E) are schematic side views showing the operation of the removal device of Figure 1, with Figure 5(A) showing the initial state, Figure 5(B) showing when multiple segment coils are pressed, Figure 5(C) showing when the segment coils are removed, Figure 5(D) showing when the removed segment coils fall, and Figure 5(E) showing the initial state returned from Figure 5(D). Figures 6(A) to (C) are schematic side views showing different adsorption states of the segment coils at the adsorption section in Figure 5.

[0052] As shown in FIG. 5(A), when removing the segment coil 9, the suction portion 5 is positioned at the removal position, which is the initial position.

[0053] Next, the pusher 7 operates. As shown in FIG. 5(B), the pusher 7 presses the plurality of segment coils 9, which are held in a row on the holder 3, toward the adsorption portion 5 via the rod 21, with the main body 19 as shown by the arrow.

[0054] This causes the segment coil 9 located at the front to come into contact with the suction portion 5. The "front" refers to the segment coil 9 that is closest to the suction portion 5 of the multiple segment coils 9 on the holder 3. Conversely, the segment coil 9 that is farthest from the suction portion 5 of the multiple segment coils 9 on the holder 3 is called the rearmost. The suction portion 5 adsorbs the segment coil 9 that has come into contact by suctioning air from holes 17a, 17b, and 17c. Therefore, the pusher 7 can ensure that the suction portion 5 adsorbs the segment coil 9.

[0055] In this embodiment, one leg 9a of the segment coil 9 is attracted to the attraction surface 15a by air suction through the hole 17a of the first block, and the other leg 9b is attracted to the attraction surface 15b through the holes 17b and 17c of the second and third blocks. This positions the legs 9a and 9b of the segment coil 9 on the attraction surfaces 15a and 15b.

[0056] At this time, because the attraction surfaces 15a and 15b are flat surfaces that abut against the legs 9a and 9b of the segment coil 9 made of rectangular wire, deformation and damage to the legs 9a and 9b due to the abutment can be suppressed and the positioning of the legs 9a and 9b can be reliably performed. Furthermore, because the attraction surfaces 15a and 15b attract both legs 9a and 9b, attraction of the segment coil 9 can be more reliably performed and deformation and damage to the legs 9a and 9b can be more reliably suppressed.

[0057] If there is no deformation of the legs 9a and 9b, the suction on the suction surfaces 15a and 15b by the holes 17a, 17b, and 17c is performed on the entire upper and lower surfaces of the suction surfaces 15a and 15b as shown in Fig. 6(A). If there is no deformation of either the legs 9a or 9b, the non-deformed leg is suctioned as shown in Fig. 6(A).

[0058] On the other hand, if the legs 9a and 9b are deformed, the spacing between the holes 17a, 17b, and 17c can be varied for each of the adsorption surfaces 15a and 15b, so that the leg 9b, which is given more importance, can be actively adsorbed.

[0059] At this time, as shown in Figure 6(B), adsorption is achieved by suction through hole 17b of the second block above adsorption surface 15b in Figure 2, or as shown in Figure 6(C), adsorption is achieved by suction through hole 17c of the third block below adsorption surface 15b in Figure 2. In this way, in this embodiment, the segment coil 9 can be gripped and positioned by adsorption to adsorption surfaces 15a and 15b through the suction of any of holes 17a, 17b, and 17c of multiple blocks. Therefore, it is possible to relax the molding precision of the segment coil 9 itself.

[0060] In this embodiment, the spacing between the multiple holes 17b and 17c is changed in the direction along the leg 9b, so that active adsorption can be performed in the part of the leg 9b where adsorption is easier, which in this embodiment is the upper part of the adsorption surface 15b.

[0061] Next, as shown in Figure 5(C), the suction unit 5 that has suctioned the segment coil 9 moves to the release position. In this way, one segment coil 9 is simultaneously suctioned (gripped) and separated for removal. Therefore, in this embodiment, the segment coil 9 can be easily removed while suppressing deformation and damage caused by suction, and the processing speed can also be increased. Therefore, the removal device 1 used in the stator manufacturing process can improve the stator manufacturing speed.

[0062] When the suction portion 5 starts to move, the actuator controls the main body 19 via the rod 21 of the pusher 7 to stop pressing the multiple segment coils 9, or to return it in the counter-pressing direction as shown by the arrow toward the end of the multiple segment coils 9.

[0063] This operation of the pusher 7 can prevent the leading segment coil 9 from taking out the next segment coil 9.

[0064] Next, as shown in Figure 5(D), at the release position, the segment coil 9 is dropped from the suction portion 5 in the release position. This drop makes it easy to release the segment coil 9. The drop of the segment coil 9 can be achieved by pressing the segment coil 9 with the pressing portion 23. However, it is also possible to drop the segment coil 9 by releasing the suction.

[0065] The push-down portion 23 may be a rod-shaped, block-shaped member that can push down the segment coil 9 by descending. The push-down portion 23 is lowered by an appropriate actuator such as a cylinder device. When the segment coil 9 is pressed down, the suction of the upper holes 17a and 17b in the first and second blocks is released. This reduces the suction force created by the combined action of holes 17a, 17b, and 17c, allowing the segment coil 9 to easily and reliably fall from its position relative to the suction surfaces 15a and 15b. At this time, the suction may be released at the same time.

[0066] Next, as shown in Figure 5(E), after the segment coil 9 has fallen, the suction unit 5 is returned to the initial position, the removal position, and the next segment coil 9 is removed. By repeating this removal process, multiple segment coils 9 can be removed.

[0067] [Alignment device] Fig. 7 is an explanatory diagram of a segment coil alignment device to which the segment coil extraction device of Fig. 1 is applied. Fig. 8 is a plan view of the segment coil alignment device of Fig. 7.

[0068] The alignment device 25 in Fig. 7 has a take-out device 1 and aligns the segment coils 9 in a circular shape. Note that Fig. 7 shows an example of a segment coil 9 in which leg 9b is longer than leg 9a, but leg 9a and leg 9b may be the same length, or leg 9a may be longer than leg 9b. In addition to the take-out device 1, the alignment device 25 has a pair of upper and lower gear-shaped jigs 27.

[0069] As shown in Figures 7 and 8, the gear-shaped jigs 27 are formed in the same shape and are arranged concentrically above and below. Each gear-shaped jig 27 has circular through-holes 29 and grooves 31 arranged adjacent to each other in the radial direction on the outer periphery. The through-holes 29 and grooves 31 of each gear-shaped jig 27 are arranged at the same positions in the circumferential and radial directions. The circumferential direction means the rotation direction of the gear-shaped jig 27. The radial direction means the direction along the diameter of the gear-shaped jig 27.

[0070] The gear-shaped jigs 27 are connected together by a connecting shaft 33. The upper end of a drive shaft 35 is connected to the axial center of the lower gear-shaped jig 27. The drive shaft 35 is rotatably supported by a support base 37. A motor 39 is attached to the underside of the support base 37, and the drive shaft 35 is connected to the motor 39 so as to be rotatable.

[0071] A guide tube 41 is concentrically arranged on the outer periphery of each gear-shaped jig 27. The guide tube 41 is fixed on the support base 37. A slit 41a is formed in the guide tube 41. The slit 41a exposes a plurality of, for example, seven, groove portions 31 in the circumferential direction.

[0072] In this alignment device 25, when the segment coil 9 drops from the suction unit 5 of the take-out device 1 at the release position, one leg 9b is inserted directly into the through-hole 29 of each of the upper and lower gear-shaped jigs 27. Note that although the relatively long leg 9b is inserted into the through-hole 29 of the gear-shaped jig 27, the relatively short leg 9b may also be inserted into the through-hole 29. Therefore, either leg 9a or 9b may be inserted into the through-hole 29.

[0073] At this time, the suction unit 5 actively suctions the leg 9b, so the leg 9b can be accurately positioned. This positioning allows the segment coil 9 to be accurately inserted into the gear-shaped jig 27 onto which it is dropped. In addition, the suction surfaces 15a and 15b also serve as guides for the dropped segment coil 9, so the leg 9b can be reliably inserted into the through-holes 29 of the gear-shaped jigs 27.

[0074] In this way, when one leg 9 b of one segment coil 9 is inserted into the through-hole 29 of the gear-shaped jig 27 , the other leg 9 a of the segment coil 9 is positioned on the outer periphery side of the guide tube portion 41 .

[0075] Next, the gear-shaped jig 27 of the alignment jig 25 rotates by one pitch of the through-hole 29. This rotation positions the next through-hole 29 as a receiving position for one leg 9b of the dropped segment coil 9.

[0076] Meanwhile, when the suction portion 5 of the removal device 1 removes the next segment coil 9 and drops it at the release position, one leg portion 9b is inserted directly into the next penetration portion 29 of each of the upper and lower gear-shaped jigs 27 in the same manner as above.

[0077] By repeating this series of operations, the segment coils 9 can be taken out one by one from the plurality of segment coils 9 of the take-out device 1 and aligned in a circular shape around the gear-shaped jig 27.

[0078] During such alignment, when the gear-shaped jig 27 rotates to one side, the segment coil 9 rotates relatively by inertia around one leg 9b inserted into the through-hole 29 as an axis. This relative rotation causes the other leg 9a of the segment coil 9 to be accommodated in the groove 31 that is radially adjacent to the through-hole 29, for example, the sixth through-hole 29 counting in the counter-rotational direction from the through-hole 29 into which the one leg 9b is inserted. Note that the groove 31 into which the other leg 9a is inserted can be set arbitrarily, not limited to the sixth. Even if the segment coil 9 is not completely accommodated in the groove 31, it will be completely accommodated if it moves along the inner circumferential surface of the guide tube 41. [Example]

[0079] Fig. 9 is a front perspective view showing a portion of a segment coil removal device according to Example 2 of the present invention. Fig. 10(A) is a schematic side view of an adsorption unit according to a comparative example not provided with the stopper of Fig. 9, and Fig. 10(B) is a schematic side view of an adsorption unit according to Example 2 provided with the stopper of Fig. 9. Note that, since Example 2 has the same basic configuration as Example 1, the same symbols are used for configurations corresponding to Example 1, and duplicated explanations will be omitted.

[0080] 9 and 10(B) of the take-out device 1 of the second embodiment is the same as that of the first embodiment except that a stopper 43 for the segment coil 9 is added.

[0081] The stopper 43 is provided on the adsorption portion 5 and prevents the adsorbed segment coil 9 from falling away from the adsorption surfaces 15a and 15b. The material, shape, size, placement position, number, retraction mechanism, etc. of the stopper 43 are not limited, but in this embodiment it is made of a metal plate material.

[0082] The tip of the stopper 43 faces a position where the leg 9b of the segment coil 9, which is attracted to the attracting surfaces 15a and 15b of the attracting unit 5, is sandwiched between the attracting surfaces 15b. The stopper 43 is disposed only on the attracting surface 15b side of the attracting unit 5, but may be provided on both the attracting surfaces 15a and 15b sides.

[0083] The stopper 43 can be retracted from the position shown in Figure 9 where it prevents the segment coil 9 from falling over. In this embodiment, the stopper 43 is connected to a link mechanism 45 and is linked to the push-down part 23a via the link mechanism 45. Specifically, the push-down part 23a has an upper part 23aa that pushes down the segment coil 9 and a lower part 23ab that pushes down the first trigger part 45a consisting of a protrusion of the link mechanism 45.

[0084] When the upper part 23aa of the push-down part 23a pushes down the segment coil 9, the lower part 23ab of the push-down part 23a pushes down the first trigger part 45a of the link mechanism 45, activating the link mechanism 45. As a result, the stopper 43 moves in conjunction with the pushing down of the segment coil 9, and moves away from the restricted position relative to the leg part 9b as shown in FIG. 9. Therefore, interference between the falling segment coil 9 and the stopper 43 can be prevented.

[0085] The stopper 43 in the retracted state is displaced so that the second trigger portion 45b, which is a protrusion of the link mechanism 45, approaches the cylinder device 46. When the second trigger portion 45b is pressed down by the cylinder device 46, the stopper 43 is again positioned in the restricted position. Note that the operation of the stopper 43 may be performed by an appropriate actuator without using the link mechanism 45.

[0086] As shown in FIG. 10(A), in the case of a segment coil 9 with low molding precision and warped legs 9a or 9b, the warping may prevent sufficient attraction force from being obtained, causing the segment coil 9 to fall over.

[0087] In contrast to this, in this embodiment, as shown in FIGS. 9 and 10(B), the stopper 43 restricts the segment coil 9 from falling over, ensuring that the adsorption portion 5 adsorbs the segment coil 9 reliably.

[0088] In addition, this embodiment can also achieve the same effects as those of the first embodiment. [Example]

[0089] Fig. 11 is a plan view showing a part of a segment coil extraction device according to Example 3 of the present invention. Fig. 12 is a perspective view of the side of a part of the extraction device of Fig. 11. Note that Example 3 has a basic configuration in common with Example 1, and therefore, the same reference numerals are used to designate the configuration corresponding to Example 1, and redundant explanations will be omitted.

[0090] 11 and 12, in this embodiment, a pressing plate 47 is added as a pressing member to the extraction device 1 for the segment coil 9. The rest is the same as in Example 1. Note that the pressing plate 47 can also be applied to Example 2.

[0091] The pressure plate 47 is fixed to a frame 48 or the like on the holder 3 side. The pressure plate 47 may be configured to be retractable. The pressure plate 47 is not limited in material, shape, size, placement position, number, etc. as long as it can prevent the leading segment coil 9 from pulling out the next segment coil 9.

[0092] The pressing plate 47 in this embodiment has an arc-shaped tip and is bent when viewed from the plane of Fig. 11. The bent tip side of the pressing plate 47 extends obliquely relative to the base end side so as to gradually approach the end sides of the multiple segment coils 9 on the holder 3.

[0093] The tip of the pressing plate 47 contacts and holds the segment coil 9 next to the leading segment coil 9. This holding is done to the extent that the next segment coil 9 will not be damaged even if it is forcibly pushed out toward the end.

[0094] As a result, the pressure plate 47 prevents the segment coil 9 next to the first segment coil 9 being removed from being taken out. Therefore, in this embodiment, only the end segment coil 9 can be easily and reliably removed from the holder 3 with a simple configuration. In addition, this embodiment can also achieve the same effects as Example 1. [Example]

[0095] Fig. 13 is a schematic front view showing the swinging of a segment coil according to a comparative example of Example 4 of the present invention. Fig. 14 is a schematic front view showing a segment coil removal device according to Example 4. Figs. 15 to 17 are schematic front views showing segment coil removal devices according to modified examples of Example 4. Note that, since Example 4 has the same basic configuration as Example 1, the same symbols are used for configurations corresponding to Example 1, and duplicate explanations will be omitted.

[0096] 13, when the segment coil 9 of the holder 3 has a single bar 3a, it tends to swing left and right around the bar 3a. Note that left and right refer to the left and right of the segment coil 9 when viewed from the adsorption direction of the adsorption part 5.

[0097] 14, in the holder 3 of this embodiment, a pair of bars 3a are used to support the segment coils 9, and a pair of rails 49 are installed on the left and right as guides. The rails 49 are installed parallel to the bars 3a and movably guide the lower ends of the legs 9a and 9b.

[0098] Therefore, the bar 3a and the pair of left and right rails 49 cooperate to suppress the left and right swinging of the segment coil 9. By suppressing the swinging of the segment coil 9 on the holder 3 in this way, the segment coil 9 can be reliably attracted to the attraction portion 5.

[0099] The modified example of Fig. 15 is obtained by omitting the rails 49 from Example 4 of Fig. 14. In this modified example, the presence of a pair of bars 3a on the left and right makes it possible to suppress the swinging of the segment coil 9 on the holder 3.

[0100] The modified example of Fig. 16 has one bar 3a in place of the fourth embodiment of Fig. 14. Even in this modified example, the swinging of the segment coil 9 on the holder 3 can be suppressed.

[0101] In the modified example of Figure 17, a guide 51 is installed inside the segment coil 9 for a single bar 3a. The guide 51 has a width corresponding to the distance between the legs 9a and 9b, and a height corresponding to the vertical length of the legs 9a and 9b.

[0102] Such inner guide 51 can suppress the left and right swinging of the segment coil 9.

[0103] The guides may be provided on the lower outer side or lower inner side of the legs 9a and 9b as long as they are capable of suppressing the left-right swinging of the segment coil 9. The guides may also be applied to the second or third embodiment.

[0104] In addition, this embodiment can also achieve the same effects as those of the first embodiment. [Explanation of symbols]

[0105] 1 Removal device 3 Holder (holding part) 5 Adsorption part 7 Pusher (pressing part) 9 segment coil 9a, 9b Legs 15a, 15b Adsorption surface 17a, 17b, 17c holes 23a Push part 25 Alignment device 43 Stopper 47 Retaining plate (retaining member) 49 Rail (guide) 51 Guide

Claims

1. A segment coil extraction device that extracts a plurality of segment coils used in a stator of a rotating electric machine one by one for subsequent processing, a holding section that holds the plurality of segment coils so that they can be sequentially removed from the ends; and a suction unit that suctions the segment coil located at the end of the holding unit and moves it to a predetermined position for the subsequent process. Segment coil extraction device.

2. The segment coil extraction device of claim 1, The adsorption portion has an adsorption surface that adsorbs at least one of the pair of legs of the segment coil, The adsorption surface is a flat surface against which the leg portion of the segment coil abuts during adsorption. Segment coil extraction device.

3. The segment coil extraction device according to claim 1 or 2, The suction unit has a plurality of holes provided on the suction surface, and performs the suction by suctioning air through the plurality of holes. Segment coil extraction device.

4. The segment coil extraction device according to claim 3, The suction portion has an suction surface for each of the pair of legs, Segment coil extraction device.

5. The segment coil extraction device according to claim 4, The arrangement intervals of the plurality of holes are varied for each of the adsorption surfaces. Segment coil extraction device.

6. The segment coil extraction device according to claim 3, The suction portion has a plurality of holes whose arrangement intervals are changed in a direction along the leg portion. Segment coil extraction device.

7. The segment coil extraction device according to claim 3, The plurality of holes are divided into a plurality of blocks, and the air is suctioned independently for each block. Segment coil extraction device.

8. The segment coil extraction device according to claim 1 or 2, The suction unit drops the attracted segment coil at the predetermined position. Segment coil extraction device.

9. The segment coil extraction device according to claim 8, A pressing part is provided which presses down the upper end of the attracted segment coil to encourage it to fall. Segment coil extraction device.

10. The segment coil extraction device according to claim 2, The suction portion is provided with a retractable stopper that prevents the attracted segment coil from falling away from the suction surface. Segment coil extraction device.

11. The segment coil extraction device according to claim 9, The adsorption portion includes a retractable stopper that prevents the adsorbed segment coil from falling away from the adsorption surface, The stopper retracts in conjunction with the pressing action of the pressing portion. Segment coil extraction device.

12. The segment coil extraction device according to claim 1 or 2, A pressing portion is provided that presses the plurality of segment coils on the holding portion toward the end of the holding portion. Segment coil extraction device.

13. The segment coil extraction device according to claim 12, The pressing is stopped or released at the start of the movement of the suction part that has attracted the segment coil. Segment coil extraction device.

14. The segment coil extraction device according to claim 12, A pressing member is provided to press the next segment coil of the first segment coil of the plurality of segment coils, Segment coil extraction device.

15. The segment coil extraction device according to claim 1 or 2, The holding portion is provided with a guide that restricts the swinging of the plurality of segment coils, Segment coil extraction device.

16. A method for extracting segment coils, which extracts a plurality of segment coils used in a stator of a rotating electric machine one by one for a subsequent process, comprising: The plurality of segment coils are held so that they can be sequentially removed from their ends, The segment coil located at the end is attracted and moved to a predetermined position for the subsequent process. How to remove the segment coil.

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