JP2676264B2 - Automatic coil winding device for micro motor coil - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for automatically winding a coil of a micro motor.

(Prior Art) This type of coil uses, for example, a tape-shaped insulated electric wire having a width of several millimeters, a thickness of several tens of micrometers, and a length of 200 millimeters or less. Since it has an extremely small inner diameter of 2 to 3 mm, it has been difficult to automate it conventionally, and it is manufactured by hand.

(Problems to be Solved by the Invention) As described above, the manual winding is difficult and inefficient because the size of the coil material and the product is small, and the quality is likely to vary. An object of the present invention is to improve the above-mentioned inconvenience caused by manual work by automating the coil winding work.

(Means for Solving the Problem) The means for solving the problem in the present invention is to provide a moving table that can move forward and backward in the same direction as the supply direction of the coil material with terminals formed at regular intervals and reverse the coil material. A winding head having a feed roller, an openable / closable chuck, a terminal detection sensor, and a cutter in this order, and a turret having a rotation axis orthogonal to a plane including the coil material and a support cylinder facing radially outward of the turret. The support pipe is provided with an extruding pipe and a winding shaft, and guide slits and locking slits are positioned at the eccentric positions of the end faces of the support cylinder and the winding shaft so as to be aligned with the feeding direction of the coil material. And a driven gear having a positioning plane on a part of its peripheral surface is fixed to the other end of the winding shaft, and an elastic member contacting only the tooth tip of the gear on the movement locus of the positioning plane in the non-working position of the support cylinder. Body In addition to being provided on the fixed member, a drive gear that meshes with the driven gear at the winding operation position of the support cylinder is provided so as to be disengageable, and when the support cylinder is at the take-out position, the tip is conical and faces the end surface of the support cylinder. A receiving pipe having a cored bar is provided so as to be able to move back and forth, and the guide slit of the holding cylinder and the locking slit of the winding shaft are engaged with the coil material at the winding operation position of the support cylinder, and the tip of the internal terminal of the coil material is then engaged. Is provided with means for retracting the coil material to the inside of the locking slit.

(Operation) Since the above-mentioned means are provided, the coil material advances toward the chuck by the feed roller, and when the inner terminal at the front part is detected by the sensor, the chuck is closed and the coil material is lightly pinched. Rotates in the reverse direction to tension the coil material and tension it vertically to the moving table. Next, when the holding barrel, the guide slits of the winding shaft, and the locking slits are fitted to the coil material by the rotation of the turret, and the holding barrel takes a vertical posture, the turret stops. Open the chuck,
By rotating the feed roller in the reverse direction, the coil material is retracted by a distance such that the front end of the inner terminal fits within the locking slit of the winding shaft. If you rotate the drive gear to rotate the winding shaft,
The leading end of the coil material is locked in the locking slit, and the subsequent portion is wound around the winding shaft. During this winding, the chuck is opened and the moving table is retracted in the direction opposite to the feeding direction of the coil material, the supporting cylinder is placed outside the moving table, the chuck is closed again to restart the winding, and the terminal passes through the sensor section. At this time, the cutting device is operated to cut at the position of the boundary between the inner terminal and the outer terminal of the terminal, and the entire portion in front of the cutting portion is wound on the winding shaft.

Then, when the turret is rotated, the tooth tips of the half of the driven gear rotate in contact with the elastic body, and when the lower positioning plane faces the elastic body, it is positioned without rotational force, and the slit of the take-up shaft becomes the slit of the support cylinder. Match. Then, when the support pipe comes to a position facing the receiving pipe, when the push-out pipe in the support pipe is pushed out, the coil is pushed out and fitted from the tip of the conical portion of the correction core metal in the receiving pipe, and the inner terminal is engaged. The shape of the stopper is modified into an arc shape and pushed into the receiving pipe, and the push-out pipe advances to eject the coil by retracting the main pipe.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. First
In FIG. 2 and FIG. 2, 1 is an automatic coil winding device of the present invention, in which a tape-shaped coil material W is terminaled by a terminaling device 2 at regular intervals and is supplied with its width direction vertical. In this device, the advancing direction of the coil material W, that is, the right side of the drawing is the front. The coil material W has a tape shape or a round cross section, and the dimensions after winding are an inner diameter of 2 to 3 mm and an outer diameter of several millimeters.

As the terminal attaching device 2, the device shown in FIG. 3 or 4 is used. FIG. 3 shows an apparatus for forming terminals by soldering, which has slits 4 on both sides of a solder bath 3 having a width l.
Is provided, and the melted solder is constantly supplied to the upper surface of the solder bath. When the coil material W is lowered along the slit 4, it is immersed in the melted solder and the insulating coating of length 1 burns. When it is removed, the solder adheres, and when it is pulled up, it becomes a solder-plated state.

The apparatus shown in FIG. 4 uses peeling grinders 5 and 5. The insulating layer is peeled off by moving the coil material W to one of the grinders 5 side and feeding it while contacting, and the peeled surface serves as a terminal. The peeling may be performed on both sides, but may be performed only on the inner side of the coil inner terminal and only on the outer side of the outer terminal.

As shown in FIG. 5, the coil material is provided with a terminal having a length l for each fixed development length L, and for example, an inner terminal T ₁ and an outer terminal T ₂ are formed with a half position thereof as a boundary. , Is cut at the boundary during the winding operation.

The automatic coil winding device 1 shown in FIGS.
It is provided with a winding section 7 and a straightening / unloading section 8. The members constituting the feeding portion 6 are mounted on a moving table 10 which can be moved forward on the rail 9 by the wheels 10a in the feeding direction of the coil material W and can be moved backward in the opposite direction. As shown in FIGS. 6 and 7, each pair of guides 1 from the coil material supply side of the table 10
1, a feed roller 12, a chuck 13 and one cutter 14 are sequentially arranged, and an arc-shaped guide end surface 11a is provided at the entrance of the guide 11.
Are formed so as to smooth the guide action, and the feed roller 12 is driven by a step motor 15 capable of forward and reverse rotation.

The pair of chucks 13 are pivotally attached by a pin 16 so as to be freely opened and closed.
A concave surface 17a is provided in the middle of each of the facing surfaces to form a groove 17, into which a support cylinder 38 of the winding head 31, which will be described later, can enter and stop at a stop position 17b. Further, one end of the chuck 13 has a sensor 18 at the side opening.
Is attached, and the position of the inner terminal T ₁ at the tip of the coil material W is detected. A pair of links 19 (8th
The drawing) is pivotally attached by a pin 20, the ends of both links 19 are connected by a pin 21, and the chucks 13, 13 are opened by moving the pin 21 in the direction of arrow 22. The pin 21 is
As shown in FIG. 1, it projects downward and is engaged with a lever 24 pivotally supported by a bracket 23 integral with the moving table 10. The lever 24 is connected to an electromagnet 25, and the electromagnet 25 is biased. Is moved in the direction of the arrow 22 to open the chuck 13 by the pin 21 and the link 19, and is pulled by the return spring 26 by the demagnetization of the electromagnet 25 to close the return chuck 13 and lightly hold the coil material.

The cutting device 14 is a scissors type shown in FIG. 9 and cuts the coil material W by pulling a link 27 with an electromagnet 28.

Next, the winding section 7 will be described. The winding part 7
Attaches four winding heads 31 to the turret 30 and
It is held and rotated by 32 and stopped at 90 ° fixed positions and its intermediate position, and the axis of the shaft 32 is perpendicular to the vertical plane along the coil material moving direction. The step motor 34 is fixed to the support plate 33 (FIG. 2) fixed to the base,
The shaft 32 is connected and fixed to the rotation shaft 34a.

As shown in FIGS. 10 and 11, four sets of radial fixing holes 35 are formed in the turret 30, and subsequently, a gear hole 36 and a fixing hole formed in the thickness direction of the turret are formed. An elongated hole 37 intersecting with 35 is provided, and the winding head 31 is fixed to the fixing hole 35. The winding head 31 is incorporated in a support cylinder 38, and an extrusion pipe 40 with a head is inserted in a stepped hole 39 in the support cylinder 38 so as to be able to move forward and backward, and is pressed by a return spring 41 toward the center. Therefore, the outer end of the extruded pipe 40 is normally pulled inward from the tip of the support cylinder 38 by the width of the coil material W. On the head of the extruded pipe 40, a pair of guide pins 42
Is fixed through the lateral hole 42a of the support cylinder 38 and the elongated hole 37 of the turret 30, and the push pipe 40 can be moved in the radial direction by pressing the pin 42 in the radial direction of the turret 30.

The winding shaft 43 is inserted and supported in the extruding pipe 40, and its inner end side is fixed to a driven gear 45 which extends into the gear hole 36 and is inserted into the gear hole 36. The driven gear 45 is driven by meshing with a drive gear 55, which will be described later, but as shown in FIG. 12, a positioning plane 46 is formed by cutting a part of the tooth portion in a range of a width 45a to form a flat surface on the outer periphery thereof. Is provided to stop the winding shaft 43 at a constant rotation position when not in operation.

As shown in FIG. 13, guide slits 47 and locking slits 48, which are slightly wider than the thickness of the coil material W, are lined up at the eccentric position on the tip surfaces of the support cylinder 38 and the winding shaft 43. The coil material W is guided by the guide slit 47, locked by the locking slit 48, and wound into an e-shape with the internal terminal T ₁ eccentric as shown in FIG. 14 (a). . By winding in this way, it is easy to work when the inner circumference of the coil c is straightened as shown in FIG. To take out the coil c,
A lever 49 is pivotally supported on the turret 30 by a pin 50,
One end of 49 is engaged with the pin 42. Therefore, if a force toward the center is applied to the other end of the lever 49, the pushing pipe 40 can be pushed outward to take out the coil.

To position the driven gear 45 at the automatic stop position, when the turret 30 rotates, the driven gear 45 contacts the top surface of the gear 45 on the movement locus of the width 45a portion as shown in FIG. However, an elastic body, that is, a rubber ring 51 having a thickness that does not contact the positioning plane 46 is used. The rubber ring 51 is
The lower portion is a flat surface 52 and is fixed to a cylindrical body 53 extending from the support plate 33 in FIG. The rotation of the turret 30 in the direction of arrow 54 causes the gear 45 to rotate in the same direction as in the direction of arrow while rotating in the direction of arrow 54a, and when the positioning plane 46 faces the rubber ring 51 at the position of, for example, becomes non-contact and rotates. Stop and hold that position up to. Then, in this state, the guide slit 47 and the locking slit 48 are aligned with each other and are fitted to the coil material W. Since the driven gear 5 is located below the plane 52 at this position, the driven gear 5 is independent of the rubber ring 51 and can be continuously rotated. Therefore, by driving the driven gear 45 by the drive gear 55, the support cylinder Can be coiled in 38. In FIG. 15, the flat surface 46 of the driven gear 45 is the rubber ring 51.
The portion for contacting the driven gear 45 with the rubber ring 51 so that the driven gear 45 is rotated to a position opposed to is a tooth tip portion other than the flat surface 46, so that the rubber ring 51 has a portion between the position and the position. The length of contact with the addendum is at most equal to the length of the addendum. Therefore, the size or shape of the rubber ring 51 is determined so that the contact of the length is surely obtained.

The drive gear 55 integrally has a pulley 56 (FIG. 2) at its lower portion, and is supported by a shaft 58 provided upright on a revolving arm 57. As shown in FIG. 16, the revolving arm 57 is supported so as to be revolvable between the locking surfaces 60a and 60b on the support base 60 around the support shaft 59, and is operated by the electromagnet 57b connected to the tail end 57a. As shown in the figure, the drive gear 55 meshes with the driven gear 45 at the position where it abuts against the stop surface 60a, and when it rotates clockwise and comes into contact with the stop surface 60b, it disengages and power transmission becomes impossible. Become. As a means for transmitting power to the drive gear 55, a two-stage idle pulley 61 is loosely fitted to a support shaft 59, a motor 63 provided with a pulley 62 is fixed to a base, and belts 64 and 65 are sequentially wound. The gears 55, 45 due to the bias of the motor 63.
And the winding head 31 is operated.

Next, the correction and take-out unit 8 will be described with reference to FIG. The main mechanism of the part 8 is installed in the main pipe 70,
The main pipe 70 is movably supported by a holder 71,
The forward / backward moving cam 72 and the return spring (not shown) cause the winding head 31.
It is operated to move back and forth.

A receiving pipe 74 is inserted in the main pipe 70 and a spring 75
It is elastically supported forward by the receiving pipe 74 from the front end,
A guide hole 76 into which the support cylinder 38 fits, a receiving hole 77 into which the coil c fits, and a hollow portion 78 are provided, and an extrusion pipe 79 is inserted from the hollow portion 78 to the receiving hole 77, and a stopper is formed in a recess in the longitudinal direction. 80 is engaged and receives a pressing force of the spring 81 from the rear, and a straightening cored bar 82 whose base end is fixed to the bottom of the receiving pipe 74 penetrates through the core hole thereof. The straightening core bar 82 has an outer diameter equal to the inner diameter of the coil c, the tip is a conical portion 82a, and the position of its apex is substantially the same as the outer end of the receiving hole 77.

Further, an arm 83 is provided so as to project from the lower end of the main pipe 70, and when the protruding portion 72a of the cam 72 is in contact with the tail end of the main pipe 71, the arm 83 is in contact with the lever 49 of the turret 30. And the receiving hole 76 of the receiving pipe 74 becomes
The coil wound in the support tube 38 by fitting to the
It will be in a state of facing.

When the cam 72 rotates further and the mountain 72b contacts, the main pipe 7
0 and the arm 83 are pushed out, but the receiving pipe 74 is
Since it is in contact with, it cannot move and the spring 75 is compressed. Then, the lever 49 is pushed by the arm 83 and rotates counterclockwise about the pin 50, moves the pin 42 to the left side in the drawing, and pushes out the push-out pipe 40 integrated therewith in the radial direction. As a result, the coil c having the inner shape shown in FIG. 14 (a) is extruded from the inside of the support cylinder 38 and enters the receiving hole 77, and the extruding pipe 79 is retracted against the spring 81 to be received in the receiving hole 77. Pushed deep into. At this time, the inner terminal T ₁ has a linear shape at the eccentric position, but the conical portion 82 of the correction core metal 82 is
While passing through a, it is gradually corrected into an arc shape and reaches the columnar portion, and is corrected into a concentric arc shape as shown in FIG. 14 (b).

When the cam 72 further rotates and contacts the surface 72C, the holding cylinder 70 is retracted by the return spring (not shown), the pressing force from the pushing pipe 40 on the winding head 31 side against the coil c is released, and the holding cylinder 70 acts in the opposite direction. The pushing spring 79 advances the pushing pipe 79 to discharge the coil c to the outside.

The configuration and operation of each part are as described above, and each movable part is controlled by the preset controller in the following order.

(1) When supplying the coil material W to the feeding portion 6 for the first time, the chuck 13 is opened, the feeding roller 12 is rotated forward, and feeding is performed until the first inner terminal T ₁ passes the sensor 18.

(2) Next, the chuck 13 is closed, and the feed roller 12 is reversely rotated while holding the coil material W to act the sensor 18, and when the end of the inner terminal T ₁ comes to the center of the sensor, the feed roller is stopped. . The coil material W is stretched between the chuck 13 and the feed roller 12 with the width direction being the vertical direction.

(3) When the turret 30 rotates in the counterclockwise direction, the winding head 31 that first faces downward is provided with the concave surface 17 of the chuck 13.
It enters the groove 17 between a and 17a and stops at the stop position 17b. The guide slits 47 of the support cylinder 40 of the head 31 and the locking slits 48 of the winding shaft 40 make the positioning plane 46 a constant direction by the action of the rubber ring 51 that engages with the driven gear 45 and both slits 47. , 48 are arranged in a line in the movement direction of the coil material W, so that the slits 47, 48 are fitted in the coil material W while holding them.

(4) In this state, the coil material W is reversely fed, and the feed roller 12 is stopped while the tip of the terminal is held in the engaging slit 48 of the winding shaft 43 in a portion of more than half of the slit 48. The distance between the sensor 18 and the stop position 17b is l ₁ (Fig. 6),
When the length of the slit 48 of the winding shaft 43 and l _2, the reverse feed length l ₃ of the coil material W tip is a _{(l 1 -l 2/2)} <l 3 <l 1.

(5) Next, the electromagnet 57b is operated to mesh the drive gear 55 with the driven gear 45.

(6) Energize the motor 63 to rotate the winding shaft 43,
Wrap around the outer circumference, and once the motor 63
To stop.

(7) The chuck 13 is opened to retract the moving table 10 to the terminal attaching device 2 side, and when the winding head 31 is located outside the chuck 13, the retracting is stopped and the chuck 13 is closed.

(8) Then, the winding operation is restarted, when it is detected that a continuous portion of the terminals T ₂ and T ₁ has passed the sensor 18, and when the length of the outer terminal T ₂ has passed the cutting device 14, the cutting device. Cut with, and continue the winding operation to wind in the entire outer terminal T ₂ .

(9) Next, the turret 30 is rotated counterclockwise by 45 °.

(10) The moving table 10 returns to the initial forward movement position.

This state is the state of (2) described above, and the work of (2) onward is repeated for each head.

(11) When the winding head 31 reaches right above, alcohol for welding is dropped to dissolve the adhesive adhering to the outer surface of the coil material, and the alcohol is evaporated to bond the coil materials to each other. Let Blow with hot air to accelerate evaporation.

(12) The turret 30 is further rotated by 90 ° so as to face the take-out device 8, the cam 72 is rotated, the coil c is pushed out by the lever 49, and the e of the inner terminal T ₁ is made by the straightening core bar 82.
Straighten the letter-shaped part.

In the above embodiment, the turntable 30 is provided with four winding heads 31 at equal intervals. However, the number of the winding heads 31 may be one or an appropriate plurality. The plurality of winding heads 31 need not be evenly spaced as long as they are controlled to stop at the winding position and the take-out position.

(Effect of the Invention) As described above, according to the present invention, the inner terminal of the coil material is retracted and wound into the locking slit provided at the eccentric position of the end surface of the winding shaft, and the retracted amount is detected by the sensor at the terminal position. Therefore, the end portion is not bent outward and is not disengaged from the locking slit, and is wound into a fixed shape. And, since the holding portion by the locking slit is in an eccentric position near the inner circumference, the correction with the correction core axis having a conical tip,
The shape of the sandwiched portion is corrected simply by pushing it toward the take-out device, and an accurate and homogeneous product is automatically produced.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a perspective view showing an example of a terminal attaching device, and FIG. 4 is a plan view showing another example of the terminal attaching device. Fig. 6 is a plan view of the coil material, Fig. 6 is a plan view of the moving table, Fig. 7 is the same front view, Fig. 8 is the same bottom view, Fig. 9 is a front view of the cutter, and Fig. 10 is a turret. Front view, Fig. 11 is a vertical sectional view of the winding head,
12 (a) and (b) are front and side views of the driven gear, and FIG.
Fig. 14 is an end view of the winding head, Figs. 14 (a) and (b) are end views of the coil before and after straightening, Fig. 15 is an explanatory view of the positioning action with respect to the winding shaft, and Fig. 16 is power transmission. FIG. 17 is a plan view of the mechanism, and FIG. 17 is a vertical cross-sectional view of the correction / extraction device. 6 ... Feeding unit, 7 ... Rolling-in unit 8 ... Correcting and unloading unit 10 ... Movement table, 12 ... Feeding roller 13 ... Chuck, 14 ... Cutting device 18 ... Sensor, 30 ... Turret 31 …… Winding head, 38 …… Supporting cylinder 40, 79 …… Extrusion pipe, 43 …… Winding shaft 45 …… Driven gear, 46 …… Positioning plane 47 …… Guide slit 48 …… Locking slit, 51… … Elastic body

Claims (1)

(57) [Claims] 1. A moving table capable of moving forward and backward in the same direction as the feeding direction of a coil material having terminals formed at regular intervals, a feed roller for the coil material, an openable / closable chuck, a terminal detection sensor and a cutter. And a winding head having a support cylinder facing outward in the radial direction of the turret is provided on a turret having a rotation axis orthogonal to a plane including the coil material, and an extrusion pipe and a winding shaft are provided on the support cylinder. A guide slit and a locking slit, which are internally mounted, are positioned at eccentric positions on the end faces of the support cylinder and the winding shaft so as to be aligned with the feeding direction of the coil material, and the other end of the winding shaft is provided on the other end of the winding shaft. Fixing the driven gear that has a positioning plane on a part of it, and at the non-working position of the support cylinder, the elastic member that contacts only the gear tooth tip is provided on the fixed member along the movement trajectory of the positioning plane, and the work of rolling up the support cylinder In position A drive gear that meshes with the dynamic gear is provided so that it can be engaged and disengaged, and when the support cylinder is in the take-out position, a receiving pipe having a conical correction core bar with a conical tip is provided so as to face the end surface of the support cylinder. Means for engaging the guide slit of the holding cylinder and the locking slit of the winding shaft with the coil material at the winding operation position, and retracting the coil material until the tip of the internal terminal of the coil material reaches the inside of the locking slit. A coil winding automatic device for a micro motor coil, comprising: