JPH0534172Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an apparatus for manufacturing a single coil constituting the armature of a flat motor. More specifically, the present invention relates to a coated coil wire stripping device for stripping the multiple layers of the legs of a single coil.

(Prior Art) A flat direct current motor is used to drive a cooling fan of an automobile radiator or a blower fan provided in an intake unit of an automatic air conditioner.

As is well known, this flat DC motor has a magnet provided in a closed casing, and the armature rotates by cutting off the magnetic field formed between the magnet and the casing.

This armature A has a flat commutator 1 and a large number of single coils 2 (usually 25) connected to the commutator 1, as shown schematically in FIG. (not shown) to form a flat rotating body.

Here, the single coil 2 is made by winding a single thin coil wire C on the same plane and forming it into a substantially fan-shaped ring shape. Both legs 2b and 2c of this coil wire C are inserted into the slot e formed in the commutator 1 It is pushed into the slot e and is thermally fused to the connecting piece 4 to prevent it from coming off from the slot e.

(Problem to be solved by the invention) However, the commutator 1 and both legs 2, 2
The conventional method for making connections is to peel off the coating layer m (see Figure 9) of the legs 2b and 2c over a predetermined length. (e.g. petroleum-based solvent).

(2) As shown in FIG. 10, there is a method of using a device in which a peeling cutter 5 is rotated around the coil wire C to scrape off only the coating layer m.

However, the former method is not preferable because the parting line of the peeled portion becomes unclear. In addition, in the latter case, the peeling cutter 5 moves backward while rotating, which is a complicated movement, so that the peeling operation takes many man-hours and the device becomes complicated. Further, even if the tip 6 provided at the tip of the peeling cutter 5 is made of cemented carbide, it cannot withstand long-term use, and the tip 6 must be replaced frequently.

Note that 7 in the figure indicates chips.

Further, in this method, although originally it is sufficient to partially peel off the coating layer m of the coil wire C connected to the commutator 1, by rotating the peeling cutter 5, the coating at the end of the coil wire C is removed. Since the layer m is peeled all around the circumference, there is also an irrational aspect to the peeling operation.

The present invention has been developed focusing on the above-mentioned problem, and the parts to be peeled off by the peeling claws are on both sides where they should be connected to the commutator, making the peeling work rational and easy, and making it possible to connect the parts with the commutator. To provide a coated coil wire stripping device in which connections are made reliably without causing continuity defects, and furthermore, tool wear is minimal even when stripping work is performed, and frequent maintenance and inspections are not required. .

(Means for Solving the Problems) The present invention to achieve the above object is to connect the end of a coated coil wire to a slot-shaped portion formed in a commutator to make it electrically conductive over a predetermined length. A coated coil wire stripping device for stripping the coating layer m includes a pair of stripping claws having ceramic tips that pinch both sides of the end of the coil wire to the extent that they reach the core wire, and an opening/closing operation of the stripping claws. a gripping mechanism that allows
The coated coil wire stripping device has a first operating section that operates this gripping mechanism, and a second operating section that displaces the stripping claw in the pinched state in the axial direction of the coil wire.

(Function) In this way, the coating layer of the coated coil wire can be gripped and handled by the pair of peeling claws, and only the portion of the coated coil wire to be connected can be peeled off very easily and reliably. Can be done. In addition, since this peeling is done using a ceramic chip, the peeling claws will not wear out over a long period of time, and since both sides of the coil wire are peeled off, there will be no conduction failure when inserted into the slot.
Since the contact area between the commutator and the single coil is increased, there is no risk of electrical contact caused by sparks or the like.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and is a partially cutaway front view.

First, the single coil manufacturing apparatus 10 in which the coated coil wire stripping device 17 is incorporated will be briefly described. The winding frame 13 consists of a pair of upper and lower dies 11 and 12 for forming a single coil, and a clamp member for clamping one end of the coil wire C. 14, a coil wire winding unit 16 having a flyer 15 for winding the coil wire C around the winding frame 13, a coated coil wire stripping device 17 for stripping the end portion of the coil wire C to a predetermined length, A cutting cutter 18 and legs 2b and 2c protruding from the annular portion 2a.
The coil wire winding part 16 is held by a support stand 21 provided on a base 20, and the lower mold 12 is installed on this coil wire winding part 16. are doing.

The coated coil wire stripping device 17 has a first movable base 22 that moves up and down with respect to a base 20, and a second movable base 23 is provided on the first movable base 22 so as to move linearly back and forth. The main part of the coated coil wire stripping device 17 is attached to the second movable base 23. It also has a molding unit 19 that is operated by a pair of so-called robot arms (not shown) hanging in the vicinity of the upper mold 11 and molds both leg parts 2b and 2c that protrude from the annular part 2a of the single coil 2. There is.

The above configuration will be explained in further detail.

FIG. 2 is a sectional view showing the winding frame portion. This winding frame 13 has a lower die 12 and an upper die 11, and a fan-shaped boss portion 8 projects from the center of the upper die 11. , the upper mold surface 2 on the narrow end 8a side of this boss portion 8
4a and the mold surface 31a of the lower mold, a gap _S1 approximately equal to the diameter of the coil wire C is formed, and the coil wire is formed between the left mold surface 24b on the wide end 8b side and the mold surface 31a. A gap _S2 larger than the diameter of the single coil annular portion 2a is formed, and when the coil wire C is wound, the coil wires C are not aligned and stacked on the side of this gap _S2 , and the outer side _a1 (the first (see figure) is made smaller.

As shown in FIG. 2, in the upper mold 11, a mold member 25 on which a boss portion 8 and the like are formed is supported by an arm 27 vertically disposed at a suitable position on the outer peripheral surface of a holder 26, and is supported downwardly by a coil spring 28. It is configured to bounce and can be displaced somewhat in the radial direction (left and right in the figure). This is so that the two large and small through holes 29a and 29b provided in the mold member 25 are easily fitted with the positioning pins 30a and 30b protruding from the lower mold 12. Thereby, the boss portion 8 of the upper mold 11 can be reliably positioned at a predetermined position.

On the other hand, the lower mold 12 has a mold member 31 having a hollow interior, and a support shaft 32 is mounted inside this mold member 31, and the support shaft 32 supports the two positioning pins 30a and 30b. . In particular, a mold member 31 is attached to the positioning pins 30a, 30b via an O-ring 33 so that they can be displaced to some extent in the lateral direction, and the fitting between the positioning pins 30a, 30b and the through holes 29a, 29b is made smooth. That's what I do.

Small diameter portion 32 provided below the support shaft 32
a is inserted into the rotating body 34 of the coil wire winding section 16 and supported by a bearing 35. Note that this rotary cylinder 34 is connected to the base 20 as shown in FIG.
It is rotated via a belt 36, a rotating shaft 37, etc. by a motor M provided below.

Furthermore, the lower mold 12 has flat portions 38 on the sides.
is formed, and a coil wire C is formed at the side end of the flat portion 38.
A clamp member 14 that clamps the starting end side of the clamp member 14 and an operating mechanism 39 that opens and closes this clamp member 14.
(See Figure 4) etc. are attached.

This clamp member 14 has a fixed claw 1 having a recess 40 into which a coil wire C is fitted, as shown in FIG.
4a, and the fixed claw 1 swings around the pin 41.
Movable claw 14 that clamps the coil wire C in cooperation with 4a
It has b. The actuating mechanism 39 is configured such that a pressure rod applies pressure to a roller 42 attached to the end of the movable claw 14b, and when the pressure rod 43 is actuated, the movable claw 14b swings around the pin 41. It is designed to clamp the coil wire C.

In FIG. 4, reference numeral 44 indicates a recess, and reference numeral 45 indicates a pin, both of which work together to position both clamp members 14. Also, a spring member 46 is concentrically attached to the pin 41 of the clamp member 14. is provided, and the movable claw 14b is always directed outward. In the vicinity of this clamp member 14, as will be described later, there is a leaf spring member 47 that uses its elasticity to fly outward and remove the U-shaped waste C ₁ (see Fig. 3) that is produced when the coil wire C is cut. is always inclined outward (see Figure 2).

As shown in FIGS. 1 and 2, the coil wire winding section 16 has a flyer 15 attached thereto via an arm 48 fixed to the rotating body 34.
A coil wire C is guided through a hollow rotating shaft 37 (see FIG. 1). The top of the flyer 15 is configured to be located on the same plane as the mold surface 31a of the lower mold 12, and the coil wire C is wound around the boss portion 8 by rotation of the flyer 15.

As shown in FIGS. 1 and 5, the covered coil wire stripping device 17 includes a pair of stripping claws 50 facing each other, a gripping mechanism 51 for causing the stripping claws 50 to grip the coil wire C, and a gripping mechanism 51 for causing the stripping claws 50 to grip the coil wire C. The first actuating part 52 for opening and closing the gripping mechanism 51, the peeling claw 50, the gripping mechanism 51, and the first actuating part 52 as a whole are moved in the front and back direction (in the axial direction of the coil wire), and the peeling claw 50 grips the gripping mechanism 51. In this state, a part of the core wire C _a and the coating layer m of the coil wire C shown in FIG. 7 are peeled off.
It consists of an operating section 53.

This peeling claw 50, as shown in FIGS. 6 and 7,
A pair of ceramic tips 50a placed opposite each other are attached to the tip of a shank 50b, and the coil wire C is gripped from both sides and the tips 50a
The tip portion 54 of the core wire C a is cut into not only the coating layer m but also a part of the core wire C _a to peel them off.

Here, the coil wire C of this example is a painted wire as shown in FIG. 7, and the surface of the core wire C _a is coated with an electrically insulating layer m ₁ such as Emenal (for example, esterimide resin) and a thermosetting resin. m ₂ (for example, polyamide-imide resin) is coated, but as another example, an electrically insulating layer m is applied.
Resins for _m1 include polymeral, polyurethane,
There are polyesters, etc., and resins for thermosetting resin _m2 include nylon, petitral, epoxy, etc. Moreover, not only such a resin but also any material that can be penetrated by the ceramic peeling claw 50 may be used. However, paper-coated conductors are not preferred as they may not be peeled off smoothly, but rubber-coated conductors or resin-coated conductors with relatively thin rubber or synthetic resin provided on the surface of the core wire _C1 are not recommended. The ceramic peeling claws 50 can bite into it and can be peeled off.

The gripping mechanism 51 extends the rear end of the shank 50b and connects the link member 55 with a pin, thereby forming a parallel link mechanism as a whole, and connects the link member 55 and the first actuating portion 52. A support plate 56 protrudes from the second movable base 23 that supports the first operating portion 52, and a pin 57 provided at the intersection of the shank 50b is fixed to the support plate 56.

Here, the first actuating section 52 is connected to the second movable base 2
A stroke adjustment mechanism 58 is provided at the end thereof, and by adjusting the stroke adjustment mechanism 58 with a screw, the peeling claw 50 is prevented from biting into the coil C unnecessarily.

Further, the second actuating portion 53 is a second actuator of the gripping mechanism 51
The movable base 23 is supported by a support plate 59 (see FIG. 1), the support plate 59 is fixed to a cylinder device 60, and the end of the piston rod 61 of the cylinder device 60 is fixed to the first movable base 22. , the cylinder device 60 is configured to reciprocate along the guide bar 62 along with the second movable base 23 and the like by feeding air or the like into the cylinder device 60.

A pair of jig cylinders 63 and 64 are provided back to back between the first movable base 22 and the base 20, and the mating surface portions are supported by a support plate 65, but the pair of jig cylinders 63 and 64 are individually They operate independently and displace the first movable base 22 vertically in two steps along the support rods 66, 66.

Note that the support plate 65 has one end inserted through only one support rod 66;
It is a rotation stopper of 3.64.

Next, the effect will be explained.

First, connect the coil wire C to the rotating shaft 37 and the fryer 15.
It is held between the fixed claw 14a and the movable claw 14b of the clamp member 14 through the clamp member 14.

Then, the upper mold 11 is lowered, and the pins 30 of the lower mold 12 are
a, 30b and the through holes 29a, 29b of the upper die 11 are fitted, the lower die 12 is attached to the rotating body 34 with the bearing 35.
It remains fixed even if it is supported through.

Next, the motor M is started, the flyer 15 is rotated via the rotating shaft 37, and the coil wire C is wound around the boss portion 8 a plurality of times. In this case, the small width end 8b side of the boss portion 8 has a gap S ₁ that is approximately the diameter of the coil wire C, but the large width end 8b side has a gap S ₂ that is larger than the gap S ₁ .
Therefore, the outer side a ₁ of the single-coil annular portion 2a is in a state in which the coils are overlapped in a cross-sectional layered manner, and the both side sides a ₁ and the inner side a ₃ (third side) of the annular portion 2a are
(see figure) is a single coil annular portion 2a in which the coil wire C exists on the same plane.

After winding a predetermined number of times, the rotation of the flyer 15 is stopped, and the forming unit 19 that forms the leg portion 2b of the single coil on the winding start side (hereinafter referred to as the start end leg portion) is lowered and While gripping the portion 2b, the vicinity of the clamp member 14 is cut using the cutter 18. At the time of this cutting, the clamp member 14 is in an unclamped state, so that the end _c1 of the U-shaped coil wire C is blown away by the leaf spring member 47 as waste material. When the coil wire C extending from the flyer 15 is in a position where it extends on the clamp member 14, the single coil wire stripping device 17 is advanced.

However, before this forward movement, both jig cylinders 63 and 64 of the second actuating part 53 are kept in an extended state, the first movable base 22 is positioned at the highest position, and the cylinder device of the first actuating part 52 is also moved backward. , keep the peeling claw 50 open.

In this state, move the cylinder device 60 onto the guide bar 62.
, and the peeling claw 50 is positioned above the coil wire C that becomes the leg 2c of the single coil at the end of winding (hereinafter referred to as the end leg).

Then, one of the cylinders 63 and 64 is operated to lower the peeling claws 50 one step so that the peeling claws 50 are positioned on both sides of the coil wire C.

Next, the first actuating portion 52 is actuated to move the link member 55 backward, and the tips 50a are brought close to each other via the shank 50b until they are spaced apart from each other by a predetermined distance, and the coil wire C is gripped by the tips 50a. When this gripping is completed, the cylinder device 60 is moved to the right in FIG.
Peel off the coil wire on the side that is to be separated by a length that is at least twice (about three times) the peeling length normally required to connect the legs.

That is, when both tips 50a grip the coil wire C, they are in a state where they have bitten into the core wire C _a of the coil wire C to some extent, and in this state, both tips 50a
When 0a is moved in the axial direction of the coil wire C, the cross-sectional shape of the coil wire C has a flat surface with the core wire C _a exposed on both sides of the coil wire C, and a circular arc upward and downward, as shown in FIG. A coil wire C having an elliptical shape with a surface and no coating layer m on both sides is obtained.

In the case of the above-mentioned rubber-coated conductor wire or resin-coated conductor wire, the entire rubber-coated or resin-coated portion from the point gripped by both tips 50a to the tip is removed, and a flat surface similar to the above is formed. Become.

If a coil wire with a circular cross section is peeled off from both sides by the peeling claws 50 to obtain a coil wire C having flat surfaces on both sides and arcuate surfaces on the top and bottom, this coil wire C can be made as shown in FIG. When inserted into the slot e of a commutator with parallel inner surfaces, the following favorable results are obtained. In other words, if the width between both flat surfaces of the coil wire C is made slightly larger than the width of the slot e of the commutator, the coil wire C is placed at the entrance of the slot e, and then pushed into the slot e, the coil wire C The arcuate surface of the lower surface of the coil wire C contacts the upper corner of the slot e, and the pushing force causes both the flat surfaces of the coil wire C and the slot e to
It exhibits self-alignment so that the inner surface of the slot e is parallel to the inner surface of the slot e, and the slot e is pushed in so that both flat surfaces are in contact with the inner surface of the slot e. Therefore, by simply pushing the coil wire C in this state, both flat surfaces of the coil wire C and the inner surface of the slot e can be electrically connected, thereby preventing electrical connection failures.

For example, according to the results of an experiment comparing the fusing method of welding the coil wire C without peeling its coating with the method of this example, the average electrical resistance value of the connection part obtained by the former method was approximately 38.64mΩ
On the other hand, the average electrical resistance value obtained by the latter construction method of this example is about 3.1 mΩ, which is about 1/12 of that.
It was found that the construction method of this example clearly has a high effect of preventing electrical connection failures.

When the peeling or removal of the coated portion is completed, the side of the jig cylinders 63 and 64 that is not lowered is lowered, and the coated coil wire stripping device 1
Lower 7 one more step.

Due to this lowering, the coil wire C held by the peeling claws 50 is lowered from the mold surface of the lower mold 12 and is located between the clamp members 14. and,
When this clamp member 14 operates and the coil wire C is clamped, the coated coil wire stripping device 17 operates both jig cylinders 63 and 64 again to move up two steps.
stand by. In this case, the peeling claw 50 is in the retracted position due to the peeling action. Therefore, the forming unit 19 can be lowered, and its cutter 18
The end leg portion 2c is grasped and cut.

In this example, more than twice the peeling length l of one leg is peeled off at one time, and the part on the terminal leg 2c side is cut by the peeling length l using a cutter, so the next single coil wire is formed. A predetermined peeling portion already exists in the coil wire C on the side that will sometimes become the starting end leg portion 2b, and the work required for peeling becomes extremely simple.

Note that the starting leg portion 2b of the first single coil must be peeled off by the operator.

Regarding the forming unit 19, since the forming unit 19 from which the starting end leg portion 2b has been cut also holds the leg portion, both forming units 19 are arranged side by side. A current is passed through the single coil to heat the thermosetting resin m ₁ that is the outermost coating of the coil wire C, and the coil wires C are thermally fused to each other.

In addition to passing the electric current, this forming unit 19 forms both legs 2b and 2c of the single coil 2 into a dogleg shape as shown by imaginary lines in FIG. 3 to facilitate connection with the commutator 1. Shape.

Then, the molding unit 19 rises together with the upper die 11, accompanied by the single coil 2, and then moves to another station, such as a turntable (not shown) on which a commutator is placed, and then descends. In this case, when the upper mold 11 is lowered onto the turntable, the coil spring 28 is bent, and the mold member 25 is bent.
is raised from the state shown in FIG. 2, the pin P attached to the holder 26 protrudes from the mold member 25, and the single coil 2 is removed from the upper mold 11.

In addition, in the above-mentioned embodiment, peeling portions are formed over a predetermined length on the legs 2b and 2c that protrude from the annularly formed single coil body 2a, but in the present invention, the coated coil wire is inserted into the slot. It can be widely used as long as it can be inserted into a part to make it electrically conductive, and is not limited to single coil manufacturing equipment for flat motors.

(Effects of the invention) As explained above, according to the invention, a coated coil wire peeling device is equipped with a pair of peeling claws each having a ceramic chip that pinches both sides of the end portion so as to bite into a predetermined depth, a gripping mechanism that opens and closes the claws so as to grip the coil wire; a first actuating section that actuates the gripping mechanism; and a second actuating section that displaces the peeling claws in the pinched state in the axial direction of the coil wire. The coating layer can be peeled off very easily using a pair of peeling claws made of ceramic chips.In particular, this chip has good wear resistance, so the chip replacement cycle becomes long, and maintenance and inspection work is required in terms of production costs. The top is also advantageous. Furthermore, since both sides of the leg are peeled off, there will be no conduction failure or electrical contact when inserted into the slot.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing one embodiment of the present invention, FIG. 2 is a sectional view of the winding frame shown in FIG. 1, FIG. 3 is a partial plan view of the winding frame, and FIG. The figure is a schematic side view of the clamp member, FIG. 5 is a plan view of the peeling claw portion, FIG. 6 is a cross-sectional explanatory diagram showing the peeled state of the coil wire, and FIG. 7 is the peeled state of the same coil. FIG. 8 is a perspective view showing a conventional armature, FIG. 9 is an enlarged view of the main part of FIG. 8, and FIG. 10 is a schematic cross-sectional view showing a conventional coil stripping device. 2... Single coil, 2a... Annular part, 2b, 2c
... Leg portion, 8 ... Boss portion, 11, 12 ... Pair of molds, 13 ... Winding frame, 14 ... Clamp member, 15
... flyer, 17 ... coated coil wire stripping device,
18... cutter, 19... molding unit, C...
...Coil wire, C _a ...Core wire, m...Coating layer, S...
…gap.

Claims (1)

[Claims for Utility Model Registration] 1) A coated coil wire whose coated layer m is peeled off over a predetermined length from the end of the coated coil wire C which is brought into an electrically conductive state by being inserted into a slot-shaped portion formed in a commutator. The stripping device includes a pair of stripping claws 50, 50 having ceramic tips 50a, 50a that pinch both ends 2b, 2c of the coil wire C so as to bite into the core wire _C1 , and the stripping claws. A gripping mechanism 51 that opens and closes 50, 50, and a first operating section 5 that operates this gripping mechanism 51.
2, and the peeling claw 50 in the pinched state is attached to the coil wire C.
A coated coil wire stripping device having a second actuating portion 53 for displacing in the axial direction of the coated coil wire. 2) The coated coil wire stripping device according to claim 1, wherein the first actuating section 52 has a mechanism 58 for adjusting the biting depth.