JPS5925552A - Molding device for armature coil for rotary electric machine - Google Patents

Abstract

PURPOSE:To execute molding work excellent in reliability automatically by continuously molding the armature coil in succession by a V-shaped leg opener, an arcuate molding device, a hexagonal type molding device and a shifter. CONSTITUTION:A plurality of U-shaped flat-type electric wires 2 are leg-opened in a V shape in the V-shaped leg opener 21, and the predetermined sections are molded in an arcuate shape in the arcuate molding device 28. With the hexagon type molding device 35, an integral holder is provided with a push jig and a receiving jig for bending a coil section to a hexagon, and it molds the coil section while pushing a plurality of the flat-type electric wires 2 against the jigs. A plurality of the flat-type electric wires bent to a U shape are held by the shifter 20, and molded in succession while being transferred.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for forming an armature coil for a rotating electric machine, and is particularly suitable for forming an armature coil for a rotating electric machine, which is suitable for forming edgewise or flatwise hexagonal armature coils. Regarding equipment.

J An armature coil for 1 and 4 rotations is used, especially a tortoise-shell type armature coil, and an example is the armature coil of a DC motor for a vehicle as shown in FIG. After cutting this single armature coil rectangular electric wire in the longitudinal direction, a predetermined portion 1ai of the plurality of rectangular electric wires 2 is bent into a U-shape as shown in FIG. 2 (a>).

Thereafter, the end portion 1b of the U-shaped multi-sand rectangular electric wire 2 is bent into four. Next, after opening the legs into a V-shape as shown in Fig. 3, as shown in Fig. Fold.

Next, the coil 1 after plane bending as shown in Fig. 5(a)
The coil end portion 1e' of f is formed into an H arc shape 1e/. Further, the coil 1g is aligned and shaped to form a hexagonal armature coil 1 as shown in FIG. 1, which is incorporated into the iron core and used.

Molding of the hexagonal armature coil 1 will be explained in detail.

First, as shown in FIGS. 2(a) and 2(b), a plurality of rectangular electric wires 2 each having a predetermined portion 1a bent into a U-shape and an end portion ib bent into an L-shape are used. There is. That is, as shown in FIG.
and 3b, and ■-shaped spacing rollers 4a and 4b.
-i Move by the cylinders 52 and 5b, and open the legs from the two-dot chain line position in the directions of arrows A1 and A. Next, as shown in FIG. 4, the straight part 111 of one side, that is, the center part, is held between the clamping tools 6a and 6b, and the corner part 1d is pushed onto the jigs 7a and 7b. 8 a % and 81] All cylinders 9a and 9b are pressurized and molded. Thereafter, as shown in FIG. 5(a), the coil lf'iz molded as described above is inserted into the mold 0, and pushed in the direction of the notched blades of B1 and B' using the pushing jigs 11a8 and 11b. Coil end portions 1e and 1e/* are held in place, and as shown in FIG. 5(b), pressure is applied from the direction of arrow C using arcuate shapes hl 12 a and 12b to form an arcuate shape as shown in coil end portion 2e'. . At this time, the wire is straightened using the manual hammer ring 13 of the coil straight section 1h6.

In this way, a hexagonal armature coil 1 as shown in FIG. 1 is formed. However, the conventional molding described above has the following drawbacks.

That is, when the legs are opened into a V-shape, the multiple U-shaped rectangular electric wires 2 collapse and deform, so it must be done while being supported manually. After bending the corner portions, each coil end portion 1e and le'e circular arc shape 2e' [Fig. 5 (
(see figure b)], the arc-shaped forming in the vicinity of the corner bending involves forming the work-hardened rectangular electric wire into the arc shape by bending the corner. Therefore, the coil end portion 1e adjacent to the corner portion 1d and xd/.

and le' are not formed into a predetermined arc shape, and such,
If the N armature coil is installed in the core slot, the coil straight portion 1h and the core will come into contact and cause damage to the insulator that will be coated on the formed coil 1' in a later process.Furthermore, when forming the arc shape In order to prevent the wire from collapsing in the coil straight portion 1h, it was necessary to perform a manual wire straightening operation.

As described above, conventional hexagonal armature coil molding requires the joint work of one or two people using dedicated machines, which has the drawback of increasing the overall number of work steps.

The present invention has been made in view of the above-mentioned points, and its object is to eliminate manual labor and to form an armature coil for a rotating electric machine in a short time in a continuous process while transferring the coil. to provide molding equipment.

The present invention consists of a roller push-opening device for opening the coil in a V-shape from two sides, a collapse-preventing coil guiding and gripping mechanism that prevents the wire from collapsing when the wire is opened in a V-shape by twisting at a predetermined angle, and a V-shaped push-opening jig. A V-shaped leg opening device consisting of a V-shaped leg opening device, an arc forming device consisting of a pressing roller and an R jig for shaping a predetermined portion of the V-shaped coil into an arc shape, and a device corresponding to each corner of a tortoise shell. A pair of pressing jigs and a receiving jig are placed together on a stand for the part to be pressed, and the corner part is pressed against the whole coil jig, while the corner part is formed at the same time or sequentially. By having all the equipment, it was possible to achieve all of the intended objectives.

Hereinafter, the present invention will be described in detail based on the embodiment shown in the F1 drawing.

FIG. 6 and FIG. 7 show an embodiment of the armature coil forming apparatus of the present invention. In the figure, 21 is an EV-shaped leg opening device, 28 is an arc-shaped forming device, and 35 is a crab-tortoise-shaped forming device.

Below are these details? explain.

First, as shown in FIG. The clamping jigs 13a1 and 13b are internally fitted with screws provided on the extension of the pinion shaft 15, and are slid on the clamping transfer table 14 by 150 rotations of the pinion shaft, thereby forming a plurality of U-shaped clamping jigs. Hold flat wire 2'c49'.

Near the nion shaft 15, 16 ranks are provided which are supported by an external force and are rotated by meshing with the ranks 16.

The holding transfer table 14 is fitted with a transfer rail 17, and a transfer frame 18 is provided 11 which also fits with the transfer rail 17 and moves the holding transfer table 14.

A rope 19 is connected to the reciprocating transfer frame 18, and the rope 19 is connected to a transfer device 20 shown in FIG. 6. The rope 19 is moved forward and backward by the transfer device 20.
move back and forth to pull the transfer frame 18, thereby moving the clamping transfer table 14.

FIG. 9 shows the configuration of the V-shaped leg opening device 21 in FIG. 6, which opens a plurality of U-shaped rectangular electric wires transferred by the transfer frame 18 into a two-metal V-shape.

As shown in the figure, the V-shaped leg opening device 21 is arranged so as not to interfere with the clamping transfer table 14 (the U-shaped temporary opening rollers 22a1 and 22b move the upper surfaces of the clamping jigs 13a1 and 13b away from each other (Z-Z arrows). This movement causes the U-shaped rectangular electric wire 2 to be opened into a V-shape.

However, normally due to the spring bank phenomenon, the predetermined V
In many cases, the shape cannot be obtained, and in order to correct this problem, in this embodiment, the leg-spreading jig 23 is lowered from above to perform pressure forming. Furthermore, the ■-shaped leg opening device d21 has legs opened at two locations on the outer peripheral surface by the leg opening jig 23, and the U-shaped rectangular electric wire 2 may cause a wire collapse phenomenon as shown in FIG. To correct this, the line collapse gripping device 2
4a1 and 24b are provided. The wire collapse gripping devices 24a1 and 24b hold the straight portion 1h of the U-shaped rectangular electric wire 2.
Support devices 25a1 and 25b that can hold and prevent line collapse
Guide L/-L 2624, and -26b 1x-x
It has a structure that allows sliding in the direction of the arrow and in the direction of the notched blade on the vertically movable rails 27a1 and 27b kY-Y'. Toward,
The V-shaped leg opening device 21 is provided with a structure that allows the transfer frame 18 to move in a direction that does not interfere with the transfer frame 18 during movement. 11th
The figure shows the configuration of the arc forming device 28 in FIG. 6, which forms a plurality of rectangular electric wires 2a spread into a V-shape by a V-shaped splitting device 21 into a golden circular arc shape.

As shown in the core diagram, the arc forming device 28 includes a rounded jig 32 having a predetermined arc shape for the coil end portion 1e, which is held by a rounded holder 30, and a pressing holder 29 provided opposite the rounded jig 32.
An arcuate pressing jig 31 is held therein. Roller holders 33a1 and 3.3b having a structure capable of holding the rectangular electric wire 23 are provided at both ends of the arc-shaped pressing jig 31. In addition, the roller holders 33a1 and 3
3b is equipped with pressing rollers 34a1 and 34b that can prevent contact damage and form a smooth arc shape.

Pressing holder 29 and R-attached holder 30 having the above configuration
has a structure that allows it to slide forward and backward by external force.

FIG. 12 shows that the rectangular electric wire 2a', whose two clamping sides are formed in an arc shape, is reversed to a predetermined posture by the arc forming device 28, and is formed into a one-metal hexagonal armature coil in the shape of a ship's bottom. The entire configuration of the hexagonal molding device 35 in FIG. 7 is shown. Although FIG. 12 shows the configuration of molding on one side of the rectangular electric wire 2a', the molding on the other side actually has a similar configuration.

In FIG. 12, the transfer table 14 supported by the divided rails 37 provided on the reversing table 36 is reversed to a predetermined position by the reversing device 36. A jig 38.a is provided on the clamping side integral frame 40a, facing the pressing jig 39a.
is provided with a restraining plate 41a to prevent bulges occurring in the thickness direction of the rectangular electric wire 2a' when bending the corners. The restraining plate 41a has an end supported by a support 42a, and has a structure that can be removed upward from the thickness direction restraining surface of the rectangular electric wire 2a with a bent corner. It is being The pressing jig 39a can slide forward and backward on the entire upper surface of the integrated frame, and the receiver can smoothly bend the corners while holding together the plurality of rectangular electric wires 2a'' held between the jig 38a and the restraining plate 41a. A pressing and bending roller 43a is provided inside to enable molding.

The above-described corner bending configuration of the rectangular electric wire 2a' is similarly configured for the corner portion 1d' of the one end coil (see FIG. 5). That is, the receiver jig 38b is provided on the integral frame 40b, facing the pressing jig 39b, and the receiver jig 38b is provided with a restraining plate 41b. The restraining plate 41b has an end supported by a support 42b, and has a structure in which it can be removed upward from the restraining surface in the thickness direction of the plurality of rectangular electric wires 2a' having bent corners. The pressing jig 39b can move forward and backward by sliding on the upper surface of the integrated frame, and the receiver can further smoothly bend and form the corners while holding the rectangular electric wire 2a'f held between the jig 38b and the restraining plate 41b. There is a pressing roller 4 inside to make it possible to
3b is provided with an integral frame 40b having a bent corner portion of the end coil on the other side, and is supported by a contraction stand 44b which is slidable in the direction of the arrow I]-)I'. The clamping side integrated frame 40a is supported by a retractable stand 44a that is slidable in the direction of the arrow t-1-II'. The contraction table 44a has a transfer table 45 which is movable in the direction of the arrow o-o' in order to separate it from the clamping jigs 13a and 13b when the bending of the corner of the flat angle '412a' is completed.
It is installed in A clamping release rack 4 for removing the flat angle 'tmi2a'4 from the clamping jigs 13a1 and 13b.
6 is provided near the reversing device 36. The clamp release rack 46 has an IH structure that can be slid forward and backward by external force. An end arc shape forming device 49 for forming one side tip end coil end portion 1e''k into a circular arc shape is arranged on the tilting table 47, and the end arc shape forming device 49 is equipped with a jig 50 with an R, and a jig 50 with an R is provided opposite to this. The pressing roller 51 is joined by the upward movement of the pressing roller 51 provided as shown in FIG. An arrow direction moving cylinder 52 and an arrow direction moving cylinder 53 are provided on the α arrow direction moving cylinder 52 so as to be movable to avoid interference during bending. The operation of one embodiment of the child coil forming apparatus will be described below.

First, when a plurality of U-shaped rectangular electric wires 2 are inserted into the clamping jigs 13a1 and 13b on the clamping transfer table 14, rank 16
is slid by an external force and engages with the pinion bolt 15 according to the configuration shown in FIG.

The nion shaft 15 rotates to hold the clamping jigs 13a and 13b2.
5: Slide and clamp on the clamping transfer table 14 in opposition to each other.

Next, by the operation of the transfer device 20, the transfer frame 18 is pulled through the rope 19 and moved to a predetermined position of the clamp transfer table 14a held by the transfer frame 18: the V-shaped leg opening device 21. Next, the temporary opening roller moving table 54 shown in FIG.
a1 and 54b move in the direction of the arrow J, and the clamping jig 13a
, and stops near 13b. Next, as shown in FIG. 9, the temporary opening rollers 22a1 and 22b slide in the direction of the arrow z-z' from a distant position in advance to avoid interference when the clamping transfer table 14 moves, and open the U-shaped rectangular electric wire 2. It slides into contact, rotates, and then opens its legs in a V-shape. However, when the temporary opening rollers 2231 and 22b slide backward and separate from the V-shaped zigzag wire 2a, the legs are not opened at a predetermined angle due to a springback phenomenon. Here, the V-shaped leg opening device 21, which has been installed in advance at a distant position, and the line collapse gripping devices 24a1 and 24b, which are provided at the same time, move upward away from the temporarily spread flat electric wire 2a. Next, the pure collapse gripping devices 24a and 24b slide down the side surfaces of the vertically movable rails 27a1 and 27b, and at the same time, the support devices 25a and 25b also descend to the position of the straight part 1h of the rectangular type, %92a, and stop. Clamp the part Ih position. Next, the leg opening jig 23 attached to the ■-shaped leg opening device 1j21 descends, pressurizes the rectangular electric wire 2a, and forms it into a predetermined angle. Following the pressurization of the leg opening jig 23, the support devices 25a and 25
b slides on the guide rails 26a1 and 26b to prevent the rectangular electric wire 2a from becoming twisted. Here, after the legs are opened to a predetermined shape, each device is released. In this state, the clamping transfer table 1
4, by pulling the transfer frame 18 and operating the transfer device 20,
It is transferred to the position of the arc forming device 28.

In FIG. 11, the rounded jig 32 held by the rounded holder 30, which has been placed at a distant position in advance, moves and
It stops at a position where it contacts the rectangular electric wire 2a whose legs are spread out in the shape of a letter. Next, the arc-shaped pushing jig 31 held by the pushing holder 29 provided facing each other, the roller holders 33a1 and 33b provided at both ends of the pushing jig 31, and the pressing rollers 3481 and 34b. is moved in the direction of the V-shaped flat wire 2a which is arranged for transfer.

Further, the moving roller holders 33a1 and 33b come into contact with and hold the flat wire 2a, and the pressing roller 3
421 and 34b are melt-proofed and rotated to gradually move and form into an arc shape, but eventually they are sandwiched and pressurized by the rounded jig 32 and the pressing jig 31, and a chain 112e as shown in FIG. It is formed into a predetermined three-sided circular arc shape. Here, the rectangular electric wire 2a formed into an arc shape on the blade side is transferred to the next process by the clamp transfer table 14 and the transfer frame 18 with each jig released.

Next, in FIG. 7, the holding and transferring table 14 transferred to the position indicated by the electric wire is transferred to the divided rail 37 provided on the upper surface of the reversing device 36, and after being supported in a fitted state, it is moved by the reversing device 36. It is detached from the transfer frame 18, reversed to a predetermined position, and stopped, as shown in FIG. Clamping jig 13
Three-sided circular arc-shaped rectangular electric wire 2 held between a1 and 13b
In a', the pre-installed receiver is inserted into the jig 38a with a predetermined gap. The other side is also molded at the same time by the same operation, but for convenience of explanation, only one side will be described. Next, by sliding the contraction table 44a in the direction of the FT' arrow, the line 2a' is the flat angle of the circular arc on the clamping side, and the clamping jig 13b and the receiver are connected to the jig 38a, and the clamping side coil end part 2e is be held in place. Next, the restraint plate 41a is attached to the support 42a.
When the corner thickness direction of the rectangular electric wire 2a' is pressed and the pressing jig 39a is slid in the direction of the arrow F, the bending roller '43a and the plurality of rectangular electric wires 2a' come into contact and rotate gradually. Finally, the pressing jig 39a, which holds the jig 38a and the restraining plate 41a, bends the corner while fully restraining the plurality of flat wires 23' in the thickness direction. It will be done. Here, the clamping release rack 46 rises in the direction of the arrow (■), and when it engages with the pinion shaft 15 and slides the clamping jigs 13a and 13b' away from each other, the rectangular electric wire 2a
The U-shaped part of ' is released. Next, the transfer table 45
Moving in the direction of the arrow, the rectangular electric wire 2a' with bent corners is detached from the clamping jigs 13a1 and 13b, and the receiver whose tip end corner 1d/ on one side is bent comes into contact with the jig 38b at a predetermined position. position and move to a predetermined position where the tip end coil end portion 1e' is formed. At the same time, the reversing device 36
With the clamp release rack 46 retracted, the clamp transfer table 14 is returned to its pre-inversion state. The clamping transfer table 14 inserted into the transfer frame 18 again is pulled by the transfer frame 18 by the operation of the transfer device 20 and returns to the position where the plurality of flat wires 2 are inserted. On the other hand, at the tip coil end part 1e/, which is being formed at the same time, the end arc forming device 49 moves in the direction of the arrow α by the cylinder 52 and in the direction of the arrow L by the cylinder 53, as shown in FIG. A configuration is made. That is, when the R-equipped jig 50 comes into contact with the tip coil end portion 1 e /, the pressing roller 51 provided on the lower side rises in the direction of the arrow M, and the tip coil end portion 1
e/ and is gradually formed while rotating, and is finally pressed by the R jig 50 to form the arc-shaped tip coil end portion 2.
e/ is formed. Next, when the pressing roller 51 retreats and descends, the cylinders 52 and 53 operate, and the end arc shape forming device 49 returns to a position where it does not interfere when the tip corner 1d' is bent. Next, the tip end corner 1d/ is bent, and this operation is performed in the same order as the bending of the clamping side coil corner 1d (see FIG. 4).

First, the restraint plate 41b presses the corner thickness direction of the plurality of rectangular electric wires 23' by the support tool 42b, and then the pressing jig 3
9 biF' When sliding in the direction of the arrow, the bending roller 43b and the plurality of rectangular electric wires 23' come into contact and rotate, gradually bending the corners, and finally the receiver is connected to the jig 38b and the restraint plate 41b. ,,! :=i The corner portion of the clamped pressing jig 39b is bent while the plurality of rectangular electric wires are fully restrained in the thickness direction. The rectangular electric wire 2a' is inserted into the hexagonal shape forming device 35 by the above reversing device 36, and hexagonal shaped coil formation is performed.

One of the operations is carried out simultaneously, and finally a hexagonal shaped coil 1' as shown by the chain line in FIG. 7 is formed.

After the molding is completed, the pressing jigs 39a1 and 39b move back and apply pressure. At the same time, the restraining plates 41a1 and 41b are released from the restraint by the supports 42a1 and 42b, and then the contraction tables 44a1 and 44b'z tortoiseshell shaped coil 1'
All the supports are moved in a direction away from the jigs 38a1 and 38b, the hexagonal shaped forming coil 1' is removed, and the transfer table 45 is moved back to the vicinity of the metal reversing device 36 in order to form the coil again. By repeating the above operations, a hexagonal-shaped coil is formed successively and continuously.

As described above, according to one embodiment of the present invention, a plurality of rectangular electric wires 2 bent into a U shape are held and transferred one after another.
Since it can be molded, the tortoiseshell-shaped coil molding operation can be performed continuously in a short period of time, and an automatic molding device suitable for dog production can therefore be provided. In addition, in the V-shaped leg opening device 21 that opens the legs in a figure 7 shape, the legs are opened at a predetermined angle in order to perform pressure molding with the leg opening jig 23, and are also equipped with line portion holding devices 24a and 24b. Because of this, it is possible to prevent the wire part bending phenomenon of the plurality of rectangular electric wires 2 when the legs are opened, and V-shaped legs can be opened with high precision. On the other hand, since the arc-shape forming of the coil end portion is performed before corner bending, there is no work hardening phenomenon caused by corner bend-forming, and a highly accurate arc shape can be obtained. In addition, when forming the arc shape and bending the corners, rollers 33a1
and 33b and rollers 4331 and 43b are provided,
Since the molding is performed gradually while rotating, damage caused by contact and sliding can be prevented.

Furthermore, after the corners of the plurality of rectangular electric wires 2 are bent at four locations, the receiver jigs 38a and 33b slide on the contraction tables 44a1 and 44b, thereby facilitating the removal of the hexagonal coil.

According to the apparatus for forming an armature coil for a rotating electric machine of the present invention as described above, there is a V-shaped leg opening device that opens a plurality of U-shaped rectangular electric wires into a V-shape, and an arc-shaped forming device that forms a predetermined portion into an arc shape. , a pressing jig for bending the corner of the coil into a tortoiseshell shape, and a receiver are provided on a stand with the jig included, and multiple flat rectangular wires #i
It is equipped with a tortoise shell molding device that molds while pressing it against the lk jig, and a transfer device, and is configured to do this sequentially and continuously, so the V-shaped legs can be molded to a predetermined angle without manual labor. , corner bending can be performed after arc forming,
It is possible to provide a molding device for an armature coil for a rotating electric machine that can automatically perform a highly reliable molding operation.

[Brief explanation of the drawing]

Figure 1 is a plan view showing a tortoiseshell armature coil, Figure 2 (
a) is a plan view of a U-shaped rectangular electric wire, FIG. 2(b) is a side view of FIG. 2(a), and FIG. 3 is a side view showing the forming process of a conventional V-shaped open leg of an armature coil. Figure 4 is a side view showing the conventional armature coil end forming process, Figure 5 (a)
is a plan view showing the state in which the armature coil is formed into a golden tortoiseshell shape;
FIG. 5(b) is a cross-sectional side view of the mold used therein, FIG. 6 is a plan view showing one embodiment of the armature coil molding apparatus of the present invention, and FIG. Front view of Figure 8
The figure shows armature coil forming equipment 1! A perspective view showing the relationship between the clamping jig, the transfer table, the transfer frame, the pinion shaft, and the rank, Figure 9 is a perspective view showing the V-shaped leg opening device adopted in this example of the actual gun, and Figure 10 is A perspective view of a rectangular electric wire partially bent, FIG. 11 is a perspective view of the arc forming device employed in this embodiment, and FIG. 12 is an inversion view of the armature coil forming device of the present invention. FIG. 13 is a perspective view showing the apparatus and the hexagonal coil forming process, and FIG. 13 is a perspective view showing the relationship between the tip coil end arc forming apparatus, the rounded jig, and the roller. 1... Armature Koinope 2... U-shaped flat core wire, 13
a. 13b...Pinching jig, 14...Pinching transfer table, 18.
... Transfer rod, 21... V-shaped leg opening device, 23... Leg opening jig, 24a, 24b... Line collapse gripping device, 31.
...Circular pressing jig, 32...Jig with R, 35...
Coil forming device, 36... Reversing device, 38a, 38b
...The receiver is a jig, 39a, 39b, pushing jig, 41a
, 41b-restriction plate, 44a, 44b... contraction table, 49
・・・End arc shape 10th 112th mouth 3rd row of grass 40th t 11th drawing 13th row

Claims (1)

[Scope of Claims] 1. A plurality of rectangular '1Li41tU-shaped coils tA V-shaped leg opening device for opening into a V-shape, and a predetermined portion of the coil opened into a V-shape by the V-shaped leg opening device. In the apparatus for forming an armature coil for a rotating electrical machine, the apparatus includes an arc forming apparatus for forming a coil into an arc shape, and a tortoise shell forming apparatus for processing the coil formed by these apparatuses into a tortoise shell shape. The device consists of a roller push-opening device for opening the coil in a V-shape from two sides, a collapse-prevention coil guiding and gripping mechanism that prevents the wire from collapsing when it is opened in a V-shape to a predetermined angle, and a V-shaped push-opening jig. The arc-shaped forming device is equipped with a pressing roller and an R+1 jig for forming a predetermined portion of the V-shaped coil into an arc shape, and the tortoise-shell-shaped forming device corresponds to each corner of the tortoise shell. A pair of pressing jigs and a receiving jig are arranged on an integrated frame for the part to be pressed, and while pressing the coil to each jig, there are four mechanisms for forming the corners simultaneously or sequentially. Features: A molding device for armature coils for rotating electric machines. 2. A V-ru connecting the V-shaped leg opening device, the arc forming device, and the tortoise shell forming device, a transfer moss that moves while holding all the coils on the rail, and a drive device that transfers the transfer table. The rotation according to claim 1, characterized in that the transfer table sequentially and continuously moves between the respective devices while holding the coil, while forming the U-shaped coil into a tortoiseshell-shaped coil. Molding equipment for armature coils for electrical machinery. 3. The four molding receivers placed at the corners of the r1 shell have a structure that allows the jig to contract inside the coil, and after molding into a tortoiseshell shape, the coil is removed by contracting the receiver mold. An apparatus for forming an armature coil for a rotary core machine according to claim 1.