JP2019129613A - Coil shaping device - Google Patents

Abstract

To allow for high accuracy shaping not requiring post-processing, and free from uneven pressing.SOLUTION: On the outside of the folding portion 8A of a coil exposed to the axial direction end of the core, multiple outside pressing members 14 are arranged radially and movably in the radial direction. On the inside of the folding portion 8A, multiple inside pressing members 16 are arranged radially and movably in the radial direction. Between respective inside pressing members 16, blade-like auxiliary pressing members 18 are arranged radially and movably in the radial direction. A columnar cam member is placed at the inside central part, and when the cam member moves in the axial direction of the core, each inside pressing member 16 moves radially and presses the folding portion 8A of the coil, and each auxiliary pressing members 18 moves late and enters the gap between the inside pressing members 16, thus pressing the unpressed portion of the folding portion 8A of the coil.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a coil shaping device that shapes a coil attached to a core of an electromagnetic device such as a motor, a generator, or a transformer.

For example, a coil attached to a stator core of a rotating electrical machine such as a motor or a generator includes a magnetic pole forming portion mounted in an inner groove of a cylindrical core, and a folded back exposed in a state of bulging outward in the axial direction of the core. It consists of parts.
The folded parts present on both ends of the core in the axial direction inevitably swell in the radial direction of the core in manufacturing, so that it does not interfere with the outer frame that covers the outside of the rotating electrical machine or the insertion of the rotor into the core. It is necessary to shape the outer shape (contour). Also in a transformer etc., shaping is needed from a viewpoint of space saving of a coil.

As this type of shaping device, a plurality of pressing pieces radially arranged radially inward are simultaneously moved radially outward while the radially outer core of the folded portion of the coil is supported by a ring-shaped pressing member. There is conventionally known a configuration in which the inside of the folded portion is pressed and the folded portion is pressed and shaped between the plurality of pressing pieces and the ring-shaped pressing member.
The respective pressing pieces are simultaneously moved in the radial direction by being pressed by the outer surface (drive cam surface) of the columnar cam moving in the axial direction of the core in the radially inner center.

However, in this method, when a plurality of pressing pieces move radially outward, gaps are formed between the pressing pieces in the circumferential direction, and it is inevitable that a portion where the folded portion of the coil cannot be pressed is intermittently generated in the circumferential direction. It was.
For this reason, post-processing such as striking and shaping a portion which has not been pressed with a plastic hammer or the like is necessary, which is both troublesome and causes the efficiency of the shaping operation to be lowered. Also, due to the manual post-processing, uniformity of shaping quality was not obtained.

  In order to cope with this problem, in Patent Document 1, a pressing portion is formed with a projecting portion projecting in the circumferential direction, and adjacent pressing pieces are formed with a recessed portion fitted to the projecting portion, and the pressing portions are circumferentially pressed A coil shaping device has been proposed which has a configuration in which the two pieces are fitted, and when a plurality of pressing pieces move outward in the radial direction, the portion pressing the folded portion of the coil in the circumferential direction is not interrupted.

Japanese Patent No. 2548787

However, in the configuration described in Patent Document 1, although the portion that presses the folded portion of the coil in the circumferential direction is not interrupted, the axial width of the convex portion that complements the press in the gap between the pressing pieces in the circumferential direction. Is significantly smaller than the original axial width of the pressing piece, and is only locally pressing the folded portion of the coil.
For this reason, it was extremely insufficient from the viewpoint of the shaping function. In other words, it has been unavoidable that uneven pressing of the folded portion of the coil occurs in the axial direction of the core.

  The present invention was devised in view of such a current situation, and in the circumferential direction of the core, pressing (pressing) of the folded portion of the coil in the gap generated between the pressing pieces is applied to the entire folded portion in the axial direction of the core. An object of the present invention is to perform high-precision shaping without the need for post-processing and without pressing unevenness.

  In order to achieve the above object, a coil shaping device of the present invention is a coil shaping device for shaping a folded portion of a coil exposed outside an axial end portion of a cylindrical core, wherein the core of the folded portion is the core. An outer pressing member disposed on the outer side in the radial direction of the core, and radially disposed on the inner side in the radial direction of the core and arranged to be movable in the radial direction, and the folded portion between the outer pressing member and the outer pressing member. A plurality of inner pressing members that are pressed between the inner pressing member and the inner pressing members in the circumferential direction, and are provided so as to be movable in the radial direction. A plurality of auxiliary pressing members that are sandwiched and pressed, and a driving mechanism that moves the plurality of inner pressing members and the plurality of auxiliary pressing members in the radial direction. The auxiliary pressing member, the inner pressing member is to move so as to enter the circumferential gap formed between the respective inner pressing member by moving in the radial direction.

  The drive mechanism moves in the axial direction to push and move the plurality of inner pressing members and the plurality of auxiliary pressing members outward in the radial direction, and a first member that moves the cam member. A cam drive source, and the cam member may have a drive cam surface that moves the inner pressing member and the auxiliary pressing member outward in the radial direction at different timings.

  Moreover, it is good also as a structure which has the urging | biasing member which urges | biases the said some inner side press member and these some auxiliary | assistant press member so that it may return to the said radial inside, and contact | abuts to the said drive cam surface.

  Further, a storage portion for storing the auxiliary pressing member is formed between the inner pressing members, and the radial outer sides of the storing portions are connected in the circumferential direction before the respective inner pressing members move outward in the radial direction. It is good also as composition which is doing.

  Moreover, it is good also as a structure by which the said outer side pressing member is provided so that it can move to the said radial direction while being arrange | positioned radially by the said circumferential direction.

  Furthermore, it is good also as a structure which has an auxiliary | assistant press member return mechanism which returns each said auxiliary | assistant press member to the said radial inside before the said inner side press member returns to the said radial inside.

  In this case, the auxiliary pressing member return mechanism includes an inclined surface formed on each auxiliary pressing member, a return cam member that moves in the axial direction and presses the inclined surface inward in the radial direction, and the return It is good also as a structure which has the 2nd cam drive source which moves the cam member for operation.

According to the present invention, it is possible to press (press) the coil folded portion in the gap generated between the pressing pieces in the circumferential direction over the entire coil folded portion in the axial direction of the core.
As a result, it is possible to improve the efficiency of the shaping operation without the need for post-processing, and to perform shaping with high accuracy without uneven pressing.

It is a longitudinal section showing an outline of a coil shaping device concerning one embodiment of the present invention. It is a top view which shows the outline | summary in the stand-by position of the coil shaping apparatus shown in FIG. It is a figure which shows the structure of the cam support body in the coil shaping apparatus shown in FIG. 1, (a) is a longitudinal cross-sectional view, (b) is a bottom view, (c) is a side view. It is a perspective view of the cam member in the coil shaping apparatus shown in FIG. It is a perspective view of the inner side pressing member in the coil shaping apparatus shown in FIG. It is a perspective view of the auxiliary press member in the coil shaping apparatus shown in FIG. It is a schematic sectional drawing which shows the shaping operation of the upper shaping part of the coil shaping apparatus shown in FIG. 1, (a) is a figure which shows a standby state, (b) shows the state which the inner side pressing member moved to the predetermined press position. (C) is a figure which shows the state which the auxiliary | assistant pressing member moved to the predetermined press position, (d) is a figure which shows the state which the movable support body moved and the upper surface of the folding | turning part of a coil was pressed. FIG. 2 is a schematic cross-sectional view showing an operation after the shaping of the coil shaping device shown in FIG. 1 is completed, in which (a) shows a state in which the cam member starts moving to a standby position, and (b) shows an auxiliary pressing member waiting. The figure which shows the state which returned to the position, (c) is a figure which shows the state which the inner side press member returned to the standby position. FIG. 2 is a schematic plan view and a partially enlarged view showing a state in which an inner pressing member of the coil shaping device shown in FIG. 1 has moved to a predetermined pressing position. FIG. 10 is a schematic plan view showing a state where the auxiliary pressing member has moved to a predetermined press position from the state of FIG. 9. It is a principal part enlarged plan view which shows the positional relationship of the accommodating part formed between the inner side press members of the coil shaping apparatus shown in FIG. 1, and an auxiliary | assistant press member.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the coil shaping device 2 according to the present embodiment includes an upper shaping portion 2 </ b> A that is positioned by inserting a part into an upper end portion of a core 6 included in the stator 4, and a lower end portion of the core 6. And a lower shaping portion 2B positioned by inserting a portion.
The stator 4 includes a cylindrical core 6 and a coil mounted via the inner groove of the core 6 and folded back at both axial ends.

The core 6 is supported (fixed in position) by the work setting device 10 shown by an imaginary line in FIG. 1 so that the axial direction is parallel to the vertical direction.
The upper shaping portion 2A and the lower shaping portion 2B are inserted into the core 6 by a drive source such as a servomotor (not shown).
The upper and lower portions of the work setting device 10 are kept spaced by an axially extending positioning rod 45.

In addition, limitation of the direction such as “vertical direction” is for convenience and is not intended to be limited to this (the same applies hereinafter).
At the upper and lower end portions of the core 6, the folded portions 8 </ b> A and 8 </ b> B of the coil are exposed in a state of bulging outside the axial end portion of the core 6, as indicated by phantom lines (two-dot chain lines). Since the upper shaping unit 2A and the lower shaping unit 2B have the same configuration, only the upper shaping unit 2A will be described below.

The upper shaping part 2A moves the rectangular plate-shaped base member 12, the outer pressing member 14, the plurality of inner pressing members 16, the plurality of auxiliary pressing members 18, and the inner pressing member 16 and the auxiliary pressing member 18 radially outward. It has a drive mechanism 20, a cylindrical cam support 34, a movable support 35 and the like.
The outer pressing member 14 is disposed on the base member 12 radially outward of the core 6 of the folded portion 8A of the coil.
The plurality of inner pressing members 16 are arranged on the inner side in the radial direction of the core 6 and are provided so as to be movable in the radial direction. The inner pressing members 16 are pressed between the outer pressing member 14 with the folded portion 8A of the coil interposed therebetween.

The plurality of auxiliary pressing members 18 are arranged between the inner pressing members 16 in the circumferential direction and are provided so as to be movable in the radial direction, and the folded portion of the coil that is not pressed by the inner pressing member 16 between the outer pressing members 14. Press 8A across.
The cam support 34 is fixed to the base member 12 and supports axial movement of a cam member 22 described later constituting the drive mechanism 20 and guides radial movement of the inner pressing member 16 and the auxiliary pressing member 18. To do.

  The movable support 35 is provided on the base member 12 so as to be movable in the axial direction, restricts movement of the inner pressing member 16 and the auxiliary pressing member 18 to the radially outer side, and supports these outer surfaces. The movable support 35 is further slidable in the axial direction with respect to the base member 12 via a sliding guide 36. In addition, after moving by being pushed downward by the drive mechanism 20, the biasing force of the coil spring 38 returns to the original position as the push of the drive mechanism 20 is released.

The upper end portions of the inner pressing members 16 and the auxiliary pressing members 18 are urged so as to always return them to the inner side in the radial direction, that is, to come into contact with a drive cam surface (described later) of the cam member 22. Coil springs 30a and 30b as members are wound.
Specifically, the coil spring 30a is wound so as to surround each inner pressing member 16, and separately, the coil spring 30b is wound so as to surround each auxiliary pressing member 18.

Coil springs 31a and 31b are wound around the lower ends of the inner pressing members 16 and the auxiliary pressing members 18 for the same purpose.
Specifically, the coil spring 31a is wound so as to surround each inner pressing member 16, and separately, the coil spring 31b is wound so as to surround each auxiliary pressing member 18.

FIG. 1 shows a state (indicated by hatching) after the folded portions 8A and 8B of the coil are shaped by the coil shaping device 2. FIG. The shape of the folded portions 8A and 8B indicated by the two-dot chain line is the shape before shaping.
The outer surface 8A-1 of the folded portion 8A is pressed and shaped by the outer pressing member 14, and the inner surface 8A-2 is pressed and shaped by the inner pressing member 16 and the auxiliary pressing member 18. Further, the upper surface 8A-3 of the folded portion 8A is pressed and shaped by the movable support 35.

As shown in FIG. 2, the outer pressing member 14 is radially arranged in the circumferential direction on the outer side of the folded portion 8A, and is provided so as to be movable in the radial direction. Each outer pressing member 14 is radially slidably provided on the base member 12 so that the position can be fixed at an arbitrary position.
The inner pressing member 16 and the auxiliary pressing member 18 are disposed radially (six in this case) radially in the circumferential direction inside the folded portion 8A, and are provided movably in the radial direction.

  As shown in FIG. 1, the drive mechanism 20 moves the inner pressing member 16 radially outward and moves the auxiliary pressing member 18 between the inner pressing members 16 by moving the inner pressing member 16 radially outward. It moves so that it may approach into the clearance of the circumferential direction formed in this.

The drive mechanism 20 is moved in the axial direction (vertical direction in FIG. 1) to press and move the inner pressing member 16 and the auxiliary pressing member 18 radially outward, and the cam member 22 is pivoted. And a servo motor (not shown) as a first cam drive source that moves in the direction.
The cam member 22 has, on its outer peripheral surface, a drive cam surface for moving the inner pressing member 16 and the auxiliary pressing member 18 in the radial direction while shifting the timing. The shape of the drive cam surface will be described in detail later.

A stepped groove 22a is formed at the upper end of the cam member 22, and the cam member 22 can be moved in the axial direction by a servo motor (not shown) via a joint 26 fitted in the stepped groove 22a. Yes.
The cam support 34 is fixed to the central portion of the base member 12, and the cam member 22 is supported by the base member 12 and the cam support 34 at its upper end and provided axially slidably.
The lower end of the cam support 34 is detachably covered with a concave lid member 37.

As shown in FIG. 3, the cam support 34 is formed in a cylindrical shape having an insertion hole 34 a of the cam member 22 inside, and on the side surface, the movement groove 34 b of the inner pressing member 16 and the auxiliary pressing member 18 are formed. The moving grooves 34c are alternately formed in the circumferential direction.
An upper end portion 34d of the cam support 34 is formed in a flange shape, and can be fixed to the base member 12 through the screw hole 34e. The lid member 37 shown in FIG. 1 is fixed to the lower end 34f of the cam support 34 as described above.

The insertion hole 34 a has a smaller diameter on the lower side, and the inclined surface 34 g at the boundary is a regulating surface that regulates the lower limit of the cam member 22.
Reference numeral 34h denotes a U-shaped groove formed in the upper end 34d of the cam support 34 for positioning with respect to the base member 12, and 34i denotes a screw hole for attaching the lid member 37.

The shapes of the cam member 22, the inner pressing member 16 and the auxiliary pressing member 18 will be described in detail with reference to FIGS. 4 to 6.
As shown in FIG. 4, the cam member 22 has a mounting portion 22 </ b> A and a cam surface portion 22 </ b> B. The cam surface portion 22 </ b> B has a wide driving cam surface 24 that presses the inner pressing member 16 and the auxiliary pressing member 18. The drive cam surfaces 25 having a narrow width for pressing are alternately formed in the circumferential direction.

A stepped groove 22a into which the joint 26 is fitted is formed in the mounting portion 22A, and a guide groove 22b into which a guide piece 28a (see FIG. 1) that is indirectly fixed to the base member 12 is fitted is in the radial direction. Are formed at opposite positions. The guide groove 22b is formed along the axial direction.
Thereby, the cam member 22 moves in the axial direction in a state in which the cam member 22 is locked. The guide piece 28 a shown in FIG. 1 is integrally formed on the ring member 28 fixed to the cam support 34. Screw holes 34 j for fixing the ring member 28 are formed in the cam support 34 (see FIG. 3A).

As shown in FIG. 4, the drive cam surface 24 has a first inclined surface 24a, a first drive cam surface 24b, a second inclined surface 24c, and a second drive cam surface 24d from the bottom to the top. .
The drive cam surface 25 has a first inclined surface 25a, a first drive cam surface 25b, a second inclined surface 25c, and a second drive cam surface 25d from the bottom to the top.
The first drive cam surface 25b and the second drive cam surface 25d of the drive cam surface 25 are displaced in positions above the first drive cam surface 24b and the second drive cam surface 24d of the drive cam surface 24. In the axial downward movement of the cam member 22, the radial outward movement of the auxiliary pressing member 18 is shifted (delayed) in timing with respect to the movement of the inner pressing member 16 in the same direction.

As shown in FIG. 5, the inner pressing member 16 is formed in a T-shaped horizontal cross section, and the inner driven portion 16B has a first inclined surface 16a and a first driven surface from top to bottom. It has 16b, the 2nd inclined surface 16c, and the 2nd driven surface 16d.
The outer pressing portion 16A of the inner pressing member 16 is provided with a coil pressing surface 16e, a spring seat portion 16f of the coil spring 30a shown in FIG. 1, and a spring seat portion 16g of the coil spring 31a.

As shown in FIG. 6, the auxiliary pressing member 18 has a blade shape (thin plate shape) and has a first inclined surface 18 a, a first driven surface 18 b, and a second inner surface from top to bottom. It has an inclined surface 18c and a second driven surface 18d.
On the outside of the auxiliary pressing member 18, a coil pressing surface 18e, a spring seat portion 18f of the coil spring 30b shown in FIG. 1, and a spring seat portion 18g of the coil spring 31b are provided.
Further, at the upper end portion on the outer side of the auxiliary pressing member 18, an inclined surface 18h constituting an auxiliary pressing member return mechanism described later is formed.

With reference to FIGS. 7 and 8, the shaping operation which is performed by the inner pressing member 16 and the auxiliary pressing member 18 due to the movement of the cam member 22 will be described.
FIG. 7 shows the operation from the standby position to the shaping, and FIG. 8 shows the return operation from the shaping end to the standby position. In order to make it easy to understand, it is assumed that the cam support 34 and the outer pressing member 14 are omitted and the outer pressing member 14 is set at a predetermined pressing position.

As shown in FIG. 7, the joint 26 fitted to the upper end portion of the cam member 22 is integrally attached to a connecting member 40 connected to a drive shaft of a servomotor (not shown). The connecting member 40 is integrally provided with a pressing ring 42 that presses the movable support 35.
The movable support 35 has a cylindrical member 44, and the inner pressing member 16 and the auxiliary pressing member 18 are restricted from moving radially outward by a predetermined amount or more by the inner peripheral surface 44a of the cylindrical member 44. Is supported.

In FIG. 7, reference numeral 46 denotes a return member for forcibly returning the auxiliary pressing member 18 radially inward.
The return member 46 is axially slidably provided on the base member 12 and has a ring-shaped return cam member 48 at its lower end. The inner surface of the return cam member 48 is provided with an inclined cam surface 48 a for pressing an inclined surface 18 h formed on the outer surface of the upper end portion of the auxiliary pressing member 18. The return member 46 is moved in the axial direction by an unillustrated air cylinder (second cam drive source).

The return member 46 and the air cylinder constitute an auxiliary pressing member return mechanism in the present embodiment. The auxiliary pressing member return mechanism plays a role of forcibly returning the auxiliary pressing member 18 radially inward before the inner pressing member 16 returns radially inward.
The lower surface 44b of the cylindrical member 44 of the movable support 35 serves as a pressing surface against the upper surface 8A-3 of the folded portion 8A.

FIG. 7A shows a state in which the cam member 22 is in the standby position (home position). In this state, the inner surface 8A-2 and the upper surface 8A-3 of the folded portion 8A have not yet been pressed into a predetermined shape.
When a servomotor (not shown) as a first cam drive source operates from this state to move the cam member 22 downward, as shown in FIG. 7B, the inner pressing member 16 is first shown in FIG. The first driven surface 16b and the second driven surface 16d are pressed by the first driving cam surface 24b and the second driving cam surface 24d in the driving cam surface 24 of the cam member 22 shown in FIG. 16 moves radially outward.

As shown in FIG. 9, each inner pressing member 16 simultaneously moves radially outward as the cam member 22 moves, and presses the inner side surface 8A-2 of the folded portion 8A into a predetermined shape. At this time, the auxiliary pressing member 18 does not move.
As can be seen from the enlarged view of the portion of the circle K of the alternate long and short dash line, a portion which is not pressed remains between the inner pressing members 16 in the circumferential direction (gap g) in a state of projecting inward.

When the cam member 22 further moves downward, as shown in FIG. 7C, the first driven surface 18b and the second driven surface 18d of the auxiliary pressing member 18 shown in FIG. The auxiliary pressing member 18 is moved radially outward by being pressed by the first drive cam surface 25b and the second drive cam surface 25d in the drive cam surface 25 shown in FIG.
Then, as shown in FIG. 10, each auxiliary pressing member 18 moves radially outward simultaneously with the movement of the cam member 22, and a circumferential gap g formed between the inner pressing members 16 (see FIG. 9). The tip end portion is inserted into the inner side surface 8A-2 of the folded portion 8A of the coil, and the portion not pressed by the inner side pressing member 16 is pressed by a predetermined amount.

The pressing operation by the auxiliary pressing member 18 is smoothly performed with almost no time following the pressing of the inner pressing member 16. Specifically, the auxiliary pressing member 18 enters the gap g at the same time as the gap g is formed.
During the operation of the auxiliary pressing member 18, there is no position change in the radial direction of the inner pressing member 16.

When the cam member 22 moves further downward, as shown in FIG. 7D, the pressing ring 42 moving integrally with the cam member 22 presses the movable support 35 downward, so the cylindrical member of the movable support 35 The lower surface 44b of 44 presses the upper surface 8A-3 of the folded portion 8A of the coil by a predetermined amount.
In this operation, there is no positional change in the radial direction of the inner pressing member 16 and the auxiliary pressing member 18.
By the operations of FIGS. 7A to 7D, shaping of the predetermined amount of the folded portion 8A is completed. That is, the folded portion 8A of the coil is finally shaped (corrected) into a folded portion 8A-4 having a rectangular shape from the state in which the coil is bulging.

As a result, it is possible to prevent the folded portion 8A of the coil from interfering with the insertion of the rotor into the outer frame or the core 6 that covers the outside of the rotary electric machine.
In addition, post-processing such as shaping by hitting a non-pressed portion with a plastic hammer or the like is unnecessary, so that the efficiency of the shaping operation can be improved and the shaping quality can be made uniform.

When the shaping of the folded portion 8A is completed, as shown in FIG. 8, the return operation to the home position of the cam member 22 and the like is started.
First, as shown in FIG. 8A, when the cam member 22 is moved upward by the operation of the servomotor as the first cam drive source, the movable support 35 shown in FIG. It moves upward by the biasing force of the coil spring 38 being compressed.

When the cam member 22 moves further upward, as shown in FIG. 8B, the upper surface of the cylindrical member 44 of the movable support 35 abuts against the base member 12, and the movable support 35 and the pressing ring 42 are separated.
Further, the auxiliary pressing member 18 starts moving inward in the radial direction earlier than the inner pressing member 16 due to the difference in the position of the inclined surface and the urging force of the coil springs 30a, 30b, 31a, 31b.

  The inner pressing member 16 starts moving inward at a timing when the auxiliary pressing member 18 returns to the inside by a predetermined amount, in other words, at a timing when the auxiliary pressing member 18 is not sandwiched by the inner pressing member 16. Thereafter, as shown in FIG. 8C, all members such as the cam member 22 return to the home position shown in FIG. 7A, and are prepared for the next shaping.

As described above, the inner pressing member 16 and the auxiliary pressing member 18 are always biased toward the center of the cam member 22 by the coil springs 30a, 30b, 31a, 31b. It is also assumed that the auxiliary pressing member 18 may not smoothly return due to a factor such as a change with time of the spring constant.
If the auxiliary pressing member 18 does not start the return operation at a predetermined timing, the auxiliary pressing member 18 is caught and locked between the inner pressing members 16 that move inward in the radial direction after the auxiliary pressing member 18, and the apparatus stops urgently. It will lead to a situation.
As a safety measure to avoid this concern, an auxiliary pressing member return mechanism is provided.

  As described above, the auxiliary pressing member return mechanism includes the inclined surface 18h (see FIG. 6) formed integrally with the upper end portion of each auxiliary pressing member 18, and moves in the axial direction to bring the inclined surface 18h radially inward. It has a ring-shaped return cam member 48 to be pressed, and an air cylinder (not shown) as a second cam drive source for moving the return cam member 48 in the axial direction.

As shown in FIG. 8 (b), the auxiliary pressing member 18 moves the cam member 22 radially inward along the first inclined surface 25a and the second inclined surface 25c of the drive cam surface 25 shown in FIG. The air cylinder moves the return member 46 in the axial direction at the timing when the.
As a result, a pressing force (component force) inward in the radial direction is generated by the contact between the inclined surface 18 h of the auxiliary pressing member 18 and the cam surface 48 a of the return cam member 48, and the auxiliary pressing member 18 is forced. Move radially inward to return to the standby position.

  The timing at which the inner pressing member 16 returns to the inner side in the radial direction does not necessarily have to be after the auxiliary pressing member 18 has completely returned to the standby position. As described above, the inner pressing member 16 is being moved during the return operation of the auxiliary pressing member 18. The timing may be such that the auxiliary pressing member 18 is not sandwiched therebetween. That is, there may be a period in which the inner pressing member 16 and the auxiliary pressing member 18 are moving together.

The shapes of the inner pressing member 16 and the auxiliary pressing member 18 will be described with reference to FIG.
The inner pressing member 16 is composed of an arc-shaped pressing portion 16A extending in the circumferential direction and a driven portion 16B extending in the radial direction, and is formed to have a T-shaped horizontal cross section as a whole.
Between the pressing portions 16A of the adjacent inner pressing members 16, a concave receiving portion 50 for receiving the auxiliary pressing member 18 is formed.

The accommodating portion 50 is formed by combining stepped recesses 16A-1 formed respectively on the pressing portions 16A of the adjacent inner pressing members 16, and the radially outer side of the accommodating portion 50 is formed on the outer peripheral edge of the pressing portion 16A. The protruding portions 16A-2 projecting in the circumferential direction are closed by facing and contacting each other. That is, they are connected in the circumferential direction.
The width in the circumferential direction of the housing portion 50 is set to be slightly larger than the width in the same direction of the auxiliary pressing member 18.

When the inner pressing member 16 moves to the pressing position, the space between the convex portions 16A-2 opens, and the tip of the auxiliary pressing member 18 enters the gap g (see FIG. 9).
The auxiliary pressing member 18 may be configured to move through the gap between the inner pressing members 16 opened in the circumferential direction without providing the accommodating portion 50. The movement stroke becomes large as indicated by st1, and the operation time becomes long. That is, the downtime in the shaping work becomes remarkable.

In addition, the profile (profile) of the drive cam surface of the cam member 22 for moving the auxiliary pressing member 18 becomes large, which may result in the enlargement of the structure.
If the auxiliary pressing member 18 enters the inner pressing member 16 through the accommodating portion 50 in the standby state as in the present embodiment, the movement stroke of the auxiliary pressing member 18 can be shortened as indicated by st2. Each problem can be solved.

Although the upper shaping unit 2A has been described above, the configuration and operation of the lower shaping unit 2B are the same except that the direction in the description is reversed. For this reason, the description about the lower shaping part 2B is abbreviate | omitted.
In the above embodiment, the number of the outer pressing member 14, the inner pressing member 16, and the auxiliary pressing member 18 is exemplified as six. However, the present invention is not limited to this, and the number of each member is further limited. May be different.

  As mentioned above, although the preferable embodiment of this invention was described, this invention is not limited to this specific embodiment, A various deformation | transformation and change are possible. The configuration of the present invention described above can be implemented by taking out only a part, and the modifications described in the above description can be applied in any combination as long as no contradiction arises. The effects described in the embodiments of the present invention only exemplify the most preferable effects resulting from the present invention, and the effects according to the present invention are not limited to those described in the embodiments of the present invention .

2 Coil shaping device 4 Stator 6 Core 8A, 8B Coil folded portion 14 Outer pressing member 16 Inner pressing member 18 Auxiliary pressing member 18h Inclined surface 20 Drive mechanism 22 Cam member 24, 25 Drive cam surface 30a, 30b, 31a, 31b Coil spring as a biasing member 48 Return cam member 50 Housing portion

Claims (7)

A coil shaping device for shaping a folded portion of a coil exposed to the outside of an axial end of a cylindrical core, comprising:
An outer pressing member disposed radially outward of the core in the folded portion;
A plurality of inner pressing members arranged radially in the radial direction of the core and movably provided in the radial direction and pressing the folded portion between the outer pressing members;
A plurality of auxiliary pressing members disposed between the plurality of inner pressing members in the circumferential direction and provided so as to be movable in the radial direction and pressing the folded portion between the outer pressing members;
A driving mechanism for moving the plurality of inner pressing members and the plurality of auxiliary pressing members in the radial direction;
The drive mechanism moves the auxiliary pressing member so as to enter the circumferential gap formed between the inner pressing members when the inner pressing member moves outward in the radial direction. Coil shaping device. The drive mechanism moves in the axial direction to push and move the plurality of inner pressing members and the plurality of auxiliary pressing members outward in the radial direction, and a first member that moves the cam member. A cam drive source,
2. The coil shaping device according to claim 1, wherein the cam member has a drive cam surface that moves the inner pressing member and the auxiliary pressing member to the outside in the radial direction while shifting the timing.   The urging member for urging the plurality of inner pressing members and the plurality of auxiliary pressing members so as to return to the inner side in the radial direction and abutting the driving cam surface. 2. The coil shaping device according to 2.   An accommodating portion for accommodating the auxiliary pressing member is formed between the inner pressing members, and the radially outer side of the accommodating portion is connected to the circumferential direction before the inner pressing members move outward in the radial direction. The coil shaping device according to any one of claims 1 to 3, wherein the coil shaping device is provided.   The coil shaping device according to any one of claims 1 to 4, wherein the outer pressing members are arranged in a plurality of radial directions in the circumferential direction and movable in the radial direction.   The auxiliary pressing member return mechanism according to any one of claims 1 to 5, further comprising: an auxiliary pressing member return mechanism for returning the auxiliary pressing members in the radial direction before the inner pressing members return inward in the radial direction. The coil shaping apparatus described in the item.   The auxiliary pressing member return mechanism includes an inclined surface formed on each auxiliary pressing member, a return cam member that moves in the axial direction and presses the inclined surface inward in the radial direction, and the return cam member The coil shaping device according to claim 6, further comprising a second cam drive source that moves the cam.

Images