JP3108383B2 - Winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbinless coil winding device, and more particularly to an improvement for preventing generation of wire debris accompanying coil manufacturing.

[0002]

2. Description of the Related Art A bobbinless coil is used for a coil of a brushless motor, and various proposals have been made for a winding device for producing such a bobbinless coil.

For example, Japanese Patent Application Laid-Open No. Sho 56-49641 discloses a method in which an insulating film or the like at a wire portion corresponding to a winding start end and a winding end of a bobbinless coil is peeled in advance and then wound, and as shown in FIG. The lead portions 102 and 103 of the wound bobbinless coil 101 are
There has been proposed a device which can be soldered to a printed circuit board in this state by being closely attached to a main body to save space.

Further, Japanese Patent Application Laid-Open No. 4-109 by the present applicant is disclosed.
No. 571 proposes a winding device (winding jig) that can automatically bring the lead portions at the winding start end and the winding end end into close contact with the bobbinless coil.

[0005] As shown in FIG. 7, this winding device comprises a convex jig 105 having a shaft 104 and a concave jig 107 having a fitting hole 106 into which the shaft 104 is fitted. Be composed. The wire rod, the end of which is held by the clamp 108, passes through the transverse groove 109 traversing the tip of the shaft 104, and
It is guided from the side 10 to the opposite side of the shaft 104. In this state, the convex jig portion 105 and the concave jig portion 107 are fitted, and the fitted convex jig portion 105 and the concave jig portion 107 are rotated in synchronization with each other. Is wound around the outer periphery of the shaft portion 104 with the portion passing through the shaft as the winding start end.

After the winding on the shaft 104, the end of the wire at the end of winding is cut by a cutter (not shown).
Further, it is stroked on the coil side wound by a roller device (not shown) and brought into close contact with the coil.

On the other hand, the winding start end of the wire is
5 is pushed further into the insertion hole 106, so that it is cut between the transverse groove 109 and the opening end of the insertion hole 106.

[0008]

However, in such a conventional winding device, wire debris is generated on the winding start end side of the coil. That is, since the cut portion of the wire at the winding start end is a portion sandwiched between the transverse groove 109 and the opening end of the fitting hole 106, the relief groove 110 and the transverse groove 109 are removed from the end gripped by the clamp 108. The wire portion that passes through and reaches the cut portion is left on the clamp 108 side, and this becomes unnecessary wire scrap. For this reason, in this conventional winding device, the wire rod is wasted, and a separate discharge device for discarding wire rod waste is required.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a winding device capable of preventing generation of wire scraps during coil manufacturing.

[0010]

According to a first aspect of the present invention, there is provided a pair of spindles which are disposed with their tips facing each other and at least one of which is movable in an axial direction, and a spindle provided at one tip of these spindles. A winding frame around which a wire is wound with the rotation of the spindle, a fitting hole formed at the other end of these spindles, and the leading end side of the winding frame fits by axial movement of the spindle; A groove formed by cutting so as to longitudinally cut the leading end side of the winding frame,
A wire guide means for guiding the vicinity of the end of the wire and accommodating the wire in the groove, and a driving means for synchronously rotating the pair of spindles; and accommodating the wire in the groove by the wire guide. After that, the winding frame is fitted to the fitting hole, and the pair of spindles are synchronously rotated to perform a winding operation on the outer periphery of the winding frame. A preliminary winding operation for rotating the spindle at a low speed is performed, and by controlling a supply amount of the wire to the winding frame side in the preliminary winding operation, the preliminary winding operation is performed during the preliminary winding operation. Control means is provided for sliding out the wire housed in the groove so that the end of the wire reaches near the end of the groove.

According to a second aspect of the present invention, the wire guide means includes a wire gripping means which grips the wire and is movable with respect to the winding frame, and wherein the control means grips a feeding side of the wire. The position of the wire gripping means is controlled.

[0012]

According to the first invention, in the preliminary winding work,
The control unit controls the supply amount of the wire rod to the bobbin side so that a wire rod smaller than that required for the preliminary winding operation by the amount of the wire rod accommodated in the groove is supplied to the bobbin reel side. In this case, most of the wire that was stored in the groove before the preliminary winding operation is used for the preliminary winding operation, and after the preliminary winding operation, the wire is completely removed from the groove. When the coiling operation is performed thereafter, no extra wire remains at the winding start end of the wound coil. Therefore, there is no need to cut an extra wire at the beginning of the winding of the coil, and the work efficiency of the winding operation is improved, and wire scrap generated by cutting the beginning of the winding is not generated, and the wire is wasted. In addition, the cost can be reduced because the wire rod waste can be prevented and waste means for discarding wire rod waste is not required.

According to the second aspect of the present invention, the supply amount of the wire to the reel can be adjusted by changing the length of the wire from the gripping position by the wire gripping means to the tip and the position of the wire gripping means itself. Therefore, the control unit can control the supply amount of the wire rod to the reel by controlling the movement of the wire gripping unit.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show the overall configuration of a winding device according to the present invention.

A wire 1 fed from an unshown feeding device (tension device) is guided via a pair of guide pulleys 2 and 3 between a pair of holding portions 4a and 4b of an upper chuck device 4 serving as wire guide means. . The type of the wire 1 is not limited, and any type of wire such as a rectangular wire can be used.

The guide pulleys 2 and 3 and the upper chuck device 4 are mounted on a guide table 5. The guide table 5 is movable by an actuator (motor or cylinder) 6 in a vertical direction with respect to a guide frame 7 fixed to a spindle support table 11. The chuck device 4 moves up and down. The one grip 4b of the upper chuck device 4 can be moved to the grip 4a side fixed to the guide table 5 by driving the actuator 8, and as a result, the wire 1 is 4a and 4b.

Below the upper chuck device 4, a lower chuck device 9 as wire guide means is disposed on the side surface of the spindle support base 13. The lower chuck device 9 holds the wire 1 between a pair of holding portions 9a and 9b,
By driving the actuator 10, the spindle support 1
Along the side surface of No. 3, it is movable vertically and horizontally.

The moving positions of the upper chuck device 4 and the lower chuck device 9 are recognized by a control device (not shown).
In addition, the movement and the gripping operation of the lower chuck device 9 are controlled. In the present invention, as described below,
By appropriately controlling the upper chuck device 4, the lower chuck device 9, and a spindle motor 21 described later by a control device, a useless wire is prevented from being generated at the winding start end of the bobbinless coil.

Upper chuck device 4 and lower chuck device 9
Between them, a pair of spindles 11 and 12 are arranged with their tips facing each other. The wire 1 is guided by the upper chuck device 4 and the lower chuck device 9,
It is guided to the bobbin 35 at the tip of the spindle 11.

The spindles 11 and 12 are rotatably supported by a spindle support 13 and a spindle support 14 arranged at a predetermined interval on the spindle support 13 via bearings 15 and 16, respectively. . Further, the spindle 12 is slidable in the axial direction together with the sliding portion 46 with respect to the spindle support 14 as described later.

A fixed plate 17 is arranged on the side of the spindle support 14 opposite to the spindle support 13, and a spindle motor 21 is fixed to the fixed plate 17.
The spindle motor 21 is controlled by a control device (not shown) to synchronously rotate the spindles 11 and 12. More specifically, the spindle motor 21
Is transmitted to the rotating shaft 23 via the belt 22, and the rotation of the rotating shaft 23 is transmitted from the pulley 24 at the right end of the rotating shaft 23 to the spindle 12 via the belt 25, and at the left end of the rotating shaft 23. As a result of transmission from the pulley 26 to the spindle 11 via the belt 27, the spindle 11 and the spindle 12 rotate in synchronization.

The spindle support 13, the spindle support 14 and the fixing plate 17 are all fixed on a base 19. The rotating shaft 23 passes through the fixed plate 17, the spindle support 14, and the spindle support 13 and is supported by these via bearings.

The spindle 11 supported on the spindle support 13 in this manner has a winding jig 31 at the tip. The winding jig 31 has a fitting hole 32 at the tip, and a winding frame 35 at the tip of the spindle 12 fits into the fitting hole 32.

On the other hand, the spindle 12 has a winding jig 3
3 and a spline shaft 34 on the central axis. The spline shaft 34 is spline-coupled to the sleeve-shaped main body of the spindle 12 and the winding jig 33 by splines formed on the outer periphery. Further, the base end side of the spline shaft 34 penetrates the fixing plate 17 and the pulley 36
And the belt 25 described above.

On the other hand, the leading end side of the spline shaft 34 penetrates the winding jig 33, and a winding frame 35 is formed at a portion of the spline shaft 34 which comes out of the winding jig 33. Since the winding frame 35 is a portion around which the wire 1 is wound,
The cross-sectional shape of the fitting hole 32 into which the bobbin 35 is fitted is formed to be the same as the shape of the bobbinless coil (for example, a triangle in the present embodiment).

A groove 37 is formed in the winding frame 35 so as to extend longitudinally. When the bobbin frame 35 is not fitted in the fitting hole 32, the wire 37 hits the winding start end of the bobbinless coil by operating the upper chuck device 4 and the lower chuck device 9 as described later. 1
Is led. When the spindle 12 is moved in the axial direction to fit the winding frame 35 and the fitting hole 32, the groove 3
The movement of the spindle 12 is controlled such that the portion of the wire 7 protruding from the fitting hole 32 has exactly the width of the wire 1 and the wire 1 penetrates the bobbin 35.

The winding on the bobbin 35 is formed by the fitting holes 3
This is performed on a portion of the winding frame 35 whose front end side is fitted to the portion 2 and is not accommodated in the fitting hole 32. Note that the present invention is characterized in that the position of the winding start end is adjusted by the vertical movement of the upper chuck device 4 that grips the wire 1 at the start of the winding operation, which will be described in detail later. explain.

During such a winding operation, hot air is blown to the coil to melt the self-bonding layer on the outer periphery of the coil.
5 are provided on the sides. Furthermore, the end of the winding cut by a cutting device (not shown) after the end of the winding,
The roller 39a is rubbed against the coil body by the roller 39a and brought into close contact with the coil body. A roller device 39 having the roller 39a is provided on the side of the bobbin 35.

The engagement and disengagement of the winding frame 35 and the fitting hole 32 is achieved by the spindle 12 being fed in the axial direction by the feeder 40. This feeder 40
A ball screw 41, an actuator 42 connected to one end of the ball screw 42, a support member 43 rotatably supporting the other end of the ball screw 41, and a ball screw 41.
And a screwing member 44 that is screwed into a substantially middle portion of the screwdriver.

More specifically, the ball screw 41
Is rotationally driven, and is fixed to the fixing member 17. On the other hand, a portion of the spindle support 14 that supports the spindle 12 is a sliding portion 46 that is slidable with respect to the spindle support 14 via a bearing 45. The sliding portion 46 is fixed to an end. Thus, when the ball screw 41 rotates, the screwing member 44 moves along the ball screw 41 toward the actuator 42 or the support member 43.
Therefore, the spindle 12 linked to the screw member 44 via the sliding portion 46 moves in the axial direction. Thus, the feed device 40 is operated, and the spindle 1
2 is advanced to the spindle 11 side.
The leading end bobbin 35 is fitted into the fitting hole 32 at the end of the opposing spindle 11. Further, when the spindle 12 is retracted from the spindle 11 side, the engagement between the winding frame 35 and the engagement hole 32 is released.

The winding jig 3 at the end of the spindle 12
3, a plate-shaped stopper 48 is fixed on the base 19 so as to be disposed between the flange 33a and the spindle support 14. As a result, the spindle 12 moves to the spindle 1
If the user tries to retreat more than a predetermined amount from the side 1, the flange 3
3a is in contact with a contact portion 48a at the upper end of a stopper 48 which is processed so as to surround the spindle 12. For this reason,
While the spindle 12 is retracted, the winding jig 33 cannot be retracted from the position in contact with the stopper 47, and the winding frame 35 and the winding jig 33 are relatively displaced. As a result, the bobbinless coil wound around the outer periphery of the bobbin 35 contacts the end of the winding jig 33 and is pushed forward from the bobbin 35.

This configuration will be described in more detail with reference to FIG. As shown in the figure, the winding jig 33 has a small flange portion 33b at an end thereof.
b is housed in a housing portion 12a formed on the tip 12b side of the spindle 12. Further, a return spring 48 is interposed between the tip 12b of the spindle 12 and the small flange portion 33b.

The urging force of the return spring 48 is
Usually, the winding jig 33 is pressed against the tip 12b side of the spindle 12 to keep the winding jig 33 and the spindle 12 integrally. On the other hand, after the spindle 12 retreats and the flange portion 33a comes into contact with the stopper 47, the spindle 1
When the winding jig 33 is not moved further, the spindle 12 contracts the return spring 48 and moves backward. As a result, the bobbin 35 retreats so as to be accommodated in the bobbin jig 33, and the coil on the outer periphery of the bobbin 35 comes into contact with the tip of the bobbin jig 33 and is pushed forward. .

In order to completely remove the coil pushed out to the leading end side of the bobbin 35 from the bobbin 35 and discharge it to a predetermined place, a coil discharging device 50 as shown in FIGS. Provided. This coil discharging device 50
It comprises a cylinder 51 and an extruding member 52 provided at the rod end of the cylinder 51. The pushing member 52 extends forward due to the extension of the cylinder 51, contacts the coil at the end of the bobbin 35, pushes the coil toward the chute 53, and drops the chute 53. The coil dropped on the chute 53
The chute 53 slides down and is transported to a predetermined place as a finished product.

Next, the operation will be described.

When performing the winding operation, first, the wire 1 guided by the guide pulleys 2 and 3 is gripped by the upper chuck device 4 such that the distal end side is left by a predetermined amount. Subsequently, the upper chuck device 4 descends and guides the distal end of the wire 1 to the lower chuck device 9 side. Then, the lower chuck device 9 grips the distal end of the wire 1, and the upper chuck device 4 releases the grip of the wire 1. At this time, the spindle 12 is retracted from the spindle 11 side, and the reel 35
Is out of the fitting hole 32 of the winding jig 31.

The lower chuck 9 holding the tip of the wire 1 is moved to a predetermined position, and the wire 1 is placed at a predetermined position. In this state, the spindle 12 is advanced to the spindle 11 side, so that the bobbin 35
Is fitted in the fitting hole 32 while being housed in the groove 37. Thereafter, the upper chuck device 4 grips the feeding side of the wire 1 again above the spindles 11 and 12, and the lower chuck device 9 releases the wire 1.

Next, the spindle motor 21 is driven at a low speed while the wire material 1 is gripped by the upper chuck device 4 in this manner, so that the spindles 11 and 12 are synchronously rotated at a low speed, and A preliminary winding operation for winding the wire 1 by a predetermined number of turns (for example, one round) is performed. During the preliminary winding operation by the low-speed rotation, the upper chuck device 4 descends in synchronization with the progress of the winding, and the wire material corresponding to the descending is supplied to the bobbin 35 side, and It is wound.

In this case, the rotation speed (rotation speed) of the spindles 11 and 12 and the descent speed (descent amount) of the upper chuck device are controlled by the control device. Wire necessary for winding to wire 1
And the length of the wire 1 below the upper chuck device 4 (for example, the upper chuck device 4 and the lower chuck device 9).
Can be calculated as the length of the wire 1 stretched between the wire rod 1 and the upper end of the wire rod 1 so that the end of the wire rod 1 slides out just before coming out of the groove 37 when the preliminary winding operation is completed. Controls the descending amount of the chuck device. That is, the lowering amount of the upper chuck device 4 (the supply amount of the wire 1).
Is reduced by a predetermined amount from the number of revolutions of the spindles 11 and 12 (the length of the wire 1 required for the preliminary winding operation), so that the tip 1a of the wire 1 During the typical winding operation, it slides in the groove 37 so as to reach just before the end of the groove 37. Accordingly, it is possible to prevent the extra wire 1 from remaining on the leading end 1a side of the wire 1 which is the winding start end of the coil.

Note that this preliminary winding operation is not performed while lowering the upper chuck device 4 as described above, but lowering the upper chuck device 4 in advance and placing the wire 1 below the upper chuck device 4. The wire 1 may be wound around the winding frame 35 by leaving a predetermined amount.

After the preliminary winding operation, the gripping of the wire 1 by the upper chuck device 4 is released, and a full-scale winding operation on the winding frame 35 is started. After the completion of the winding operation, the wire 1 is cut, and the cut end of the winding is placed on the roller device 3.
9 and the spindle 12
Is retracted, and the discharging device 50 is operated to discharge the wound coil to the chute 53 side.

As described above, according to the present invention, without cutting the winding start end side following the winding operation, as shown in FIG.
As the winding start end 61 of the coil 60, only the portion remaining in the groove 37 of the bobbin 35 after the preliminary winding operation remains.
Therefore, according to the present invention, the wire rod cutting operation can be omitted, and the number of steps of the winding operation can be reduced, so that the work efficiency can be improved, and the generation of wire rod waste can be prevented. The device is not required, and the cost can be reduced.

[0044]

According to the first aspect of the present invention, in the preliminary winding operation, the control means controls the supply amount of the wire to the bobbin side so that the amount of the wire required for the preliminary winding operation is reduced. If a wire material smaller than the wire material accommodated in the groove is supplied to the bobbin side, most of the wire material housed in the groove before the preliminary winding work is replaced by the preliminary winding. It is used for work, and after the completion of preliminary winding work, the wire rod reaches just before it slides completely out of the groove, so if you do the winding work, then the winding start end of the wound coil will be No extra wires remain. Therefore, there is no need to cut an extra wire at the beginning of the winding of the coil, and the work efficiency of the winding operation is improved, and wire scrap generated by cutting the beginning of the winding is not generated, and the wire is wasted. In addition, the cost can be reduced because the wire rod waste can be prevented and waste means for discarding wire rod waste is not required.

According to the second aspect of the present invention, the supply amount of the wire rod to the bobbin side is adjusted by changing the length of the wire rod from the gripping position by the wire rod gripping means to the tip and the position of the wire rod gripping means itself. Therefore, the control unit can control the supply amount of the wire to the reel by controlling the movement of the wire gripping unit.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a sectional view showing the spindle.

FIG. 4 is a sectional view showing a bobbin.

FIG. 5 is a schematic view showing a coil wound up similarly.

FIG. 6 is a perspective view showing a bobbinless coil.

FIG. 7 is a perspective view showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 wire rod 1a end 2 guide pulley 3 guide pulley 4 upper chuck device 4a gripper 4b gripper 5 guide plate 6 actuator 7 guide frame 8 actuator 9 lower chuck device 9a gripper 9b gripper 10 actuator 11 spindle 12 spindle 13 spindle Support stand 14 Spindle support stand 17 Fixing plate 19 Base 21 Spindle motor 31 Winding jig 32 Fitting hole 33 Winding jig 34 Spline shaft 35 Winding frame 37 Groove 40 Feeding device

Claims (2)

(57) [Claims] 1. A pair of spindles, which are disposed with their tips facing each other and at least one of which is movable in the axial direction, and a wire rod is provided at one tip of these spindles, and a wire is wound around the outer circumference with rotation of the spindles. A bobbin to be turned; a fitting hole formed at the other end of these spindles, the front end of the bobbin being fitted by axial movement of the spindle; and a longitudinally cutting end side of the bobbin. A groove formed by cutting, a wire guide for guiding the vicinity of an end of the wire and housed in the groove, and a drive for synchronously rotating the pair of spindles; After accommodating the wire rod in the groove portion, the winding frame is fitted to the fitting hole, and the pair of spindles are synchronously rotated to perform winding work on the outer periphery of the winding frame. Prior to the winding operation, a preliminary winding operation of rotating the spindle at a low speed is performed prior to the winding operation, and a supply amount of the wire to the winding frame side in the preliminary winding operation is controlled. And a control means for sliding out a wire housed in the groove during a preliminary winding operation so that an end of the wire reaches near an end of the groove. Winding device. 2. The wire rod guiding means includes a wire rod gripping means which grips the wire rod and is movable with respect to the winding frame, and the control means comprises a wire rod gripping means which grips a feeding side of the wire rod. The winding device according to claim 1, wherein the position is controlled.