JP2703333B2 - Magnetic head winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a double azimuth type magnetic head for a VTR, in which a pair of head chips are provided at an end of a base with a predetermined gap. These head chips have an annular wound portion formed around a winding hole, and when manufacturing a magnetic head in which a wire is wound around the wound portion, the above-described wound portion is used. The present invention relates to a winding device for winding a wire around a wire.

(Prior Art) As shown in FIG. 5, a double azimuth type magnetic head used for a VTR or the like has a pair of head chips 2a and 2b arranged at a top end of a base 1 with a predetermined gap therebetween. It is set up. These head chips 2a, 2b have wound portions 4, 4 formed in an annular frame shape surrounding the winding holes 3, 3, respectively, and these wound portions 4, 4 are coated. Broken wire
It is configured by winding 5,5. Such a pair of head chips 2a, 2b are fixed to the base 1 adjacent to each other so as to be aligned on the same plane (a state where the axes are parallel) with a gap 6 therebetween.

In such a magnetic head, when the wires 5, 5 are wound around the wound portions 4, 4, an automatic winding device is used. This winding device will be described with reference to FIGS. 6 and 7.

In the figure, reference numeral 10 denotes a work holder, and the work holder 10 includes a fixed chuck 12
A movable chuck that comes in contact with and separates from the movable chuck 12 is attached to the fixed chuck 12 and the movable chuck 13 so as to clamp the magnetic head. The movable chuck 13 is rotatably attached to the base 11 by a support shaft 14, and the upper end thereof is brought into contact with the fixed chuck 12 by the urging force of the coil spring 15. Accordingly, the magnetic head has a base 1 held between the fixed chuck 12 and the upper end of the movable chuck 13 so that the head chips 2a and 2b are held in parallel with each other.

The base 11 of the work holder 10 is connected to a piston rod 17 of an air cylinder 16 for elevating and lowering, and a center portion is connected to an output shaft 19 of a pulse motor 18. The base 11 rotates integrally with the output shaft 19 of the pulse motor 18, but can freely move in the axial direction with respect to each other.

When the work holder 10 is raised by the operation of the lifting / lowering air cylinder 16, the magnetic head is also raised integrally, and when the pulse motor 18 is rotated, the work holder 10 is rotated in a horizontal plane and the magnetic head is also rotated. It has become.

The work holder 10 is provided with a tension mechanism 20. That is, a stay 21 and a guide 22 are provided on a side surface of the base 11, for example, on the right side in the drawing, and an elevating and lowering air cylinder 23 constituting the tension mechanism 20 is fixed to the stay 21. A guide rod 24 is connected to the rod of the air cylinder 23.
Slidably penetrates the guide 22, and a wire pin 25 projects from the upper end of the guide rod.

On the left and right of the work holder 10,
A pair of wire insertion devices 30a and 30b are provided separately from the wire insertion devices 30a and 30b. The wire 5 is wound around these wire insertion devices 30a and 30b. These wire insertion devices
30a and 30b are sliders 31a and 3 that can move in the left and right directions.
Air cylinders 32a and 32b are mounted on 1b. At the ends of the piston rods of the air cylinders 32a and 32b, wire suction ports 33a and 33b connected to a vacuum pump are attached,
At the front side of the wire suction port bodies 33a and 33b, the suction port body 33 is provided.
Fingers 34a, 34b are provided which open and close in response to advancing and retreating of a, 33b. The fingers 34a, 34b have a structure in which clamps 36, 36 made of urethane resin or the like are provided at the tips of two leaf springs 35, 35 connected to the bases of the suction ports 33a, 33b. When the suction port bodies 33a and 33b move forward, they open, and when they retreat, they close.

Further, in front of each finger 34a, 34b, for example, upper and lower pairs of rollers 37, 37 and a wire feeder 38a, 38b formed by combining a driving mechanism (not shown) for driving the rollers 37, 37 are provided with the above-described wire. 5 is installed so as to be movable in a direction perpendicular to the direction in which the 5 is stretched. These wire feed portions 38a and 38b respectively advance toward a path where the wire 5 is stretched and are positioned, or are connected to an air cylinder 39 retracted from this path.

A method of winding a magnetic head using the automatic winding device having such a configuration will be described with reference to FIGS. 8 to 14. First, the head chips 2a and 2b of the magnetic head are connected to the upper end of the work holder 10. The base 1 is clamped between the fixed chuck 12 and the movable chuck 13 so as to protrude therefrom. It is set so that the winding hole 3 of one head chip 2a is located on the line connecting the wire insertion devices 30a and 30b. Next, for example, the left wire feed portion 38a advances to a position where the wire is stretched, and the wire feed portion 38a is positioned so as to face the winding hole 3 of one head chip 2a.

Thereafter, the wire 5 is fed out using the rollers 37, 37,
The wire 5 is sucked as shown in FIG. 8 by inserting the winding hole 3 of one head chip 2a and applying vacuum pressure to the suction port 33b of the wire insertion device 30b on the opposite side (vacuum suction). .

Thus, the wire 5 passes through the winding hole 3 of one head chip 2a and is stretched between the left and right wire insertion devices 30a and 30b.

Next, as shown in FIG.
b retreats, and the leading end side of the wire 5 is held by the finger 34b. Then, the guide rod 24 is raised by the operation of the cylinder 23 of the tension mechanism 20 shown in FIG. 7, and the wire 5 immediately after the wire pin 25 at the upper end is inserted through the winding hole 3 as shown in FIG. The portion is locked and pushed up, and the leading end side of the wire 5 is pushed up to an upper region which does not interfere with the wound portions 4 and 4 of the head chips 2a and 2b.

Then, while the tension is applied to the wire 5, the pulse motor 18 shown in FIG.
As shown in the figure, the magnetic head is
Rotated 0 °. As a result, the adjacent head chips 2a, 2
The position of b is switched. Thereafter, the elevating air cylinder 16 shown in FIG. 7 is operated, and the magnetic head is raised as shown in FIG. For this reason, the leading end side of the wire 5 is guided into the gap 6 formed between the wound portions 4 of the head chips 2a and 2b. Next, as shown in FIG. 13, the wire pin 25 is lowered to disengage the wire 5, and at the same time, the wire chuck is switched from the finger 34b to the suction port body 33b to suck the wire 5 in vacuum. .

Thereby, the wound portion 4 of one head chip 2a has
The wire 5 is wound around a frame portion on the side of the gap 6, that is, a vertical portion.

In this manner, the wire 5 is wound one turn around the vertical portion of the wound portion 4 of one head chip 2a. Then, the suction port 33b is inserted into the winding hole 6 of one head chip 2a from the side of the suction port 33b, and the drawn-out end is chucked by the suction port 33a of the one wire insertion device 30a.
Then, the suction port body 33a retreats, and as shown in FIG.
Rises to push up the wire 5.

Next, the work holder 10 rotates 180 ° in the same direction as above,
When the tire pin 25 is lowered and the finger 33a pulls the wire 5, the second wire is wound around the vertical portion of the one head chip 2a.

In this way, by using the left wire insertion device 30a and the right wire insertion device 30b, winding the wire 5 for a predetermined number of turns while alternately delivering the wire 5,
A wire is wound around the wound portion 4 of the head chip 2a.

(Problems to be solved by the invention) By the way, the left and right head chips wound in this way
As shown in FIG. 5, 2a and 2b are juxtaposed at the upper end of the base 1 with a gap 6 therebetween.

In this case, the inner lower ends of the head chips 2a and 2b protrude inward from the slits 1a formed in the base 1.

However, if the inner lower end corners 2aa and 2bb of these head chips 2a and 2b protrude inside the slit 1a, the gap 6 is formed when the wire 5 is wound by the automatic winding device.
Is narrow, a wire is wound around these protruding corners 2aa and 2bb as indicated by imaginary lines 5a and 5b in FIG.

Such products no longer exhibit the desired magnetic properties,
There is a defect that it becomes a defective product and lowers the yield.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide a winding device for a magnetic head, which prevents a wire from being wound around a protruding corner at the inner lower end of a head chip and improves the yield. It is something to offer.

[Constitution of the Invention] (Means for Solving the Problems) According to the present invention, a wire is wound around a portion of a lower end corner of a head chip, which protrudes from the base, on a holder that supports the base. And a closing member for preventing the occurrence of the air pressure.

(Operation) According to the present invention, the portions of the lower end corners of the adjacent head chips that are opposed to each other and protrude from the base are closed by the closing member, so that the wires are not wound around the protrusions of the lower end corners.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIGS. 1 to 3 show a work holder 50 of the winding apparatus according to the present invention. The same members as those of the work holder 10 shown in FIGS. 6 and 7 are denoted by the same reference numerals. The description is omitted. Also, the left and right wire insertion devices 30
Since a and 30b may be the same as those shown in FIGS. 6 and 7, the description is omitted in this embodiment.

In the work holder 50 of the present embodiment, the fixed chuck 12 provided on the base 11 is separated into right and left as shown in FIG. 2, and a closing mechanism 60 is provided between these left and right fixed chucks 12a and 12b. Have been.

The closing mechanism 60 includes an elevating drive air cylinder 62 fixed to the base 11 via a stay 61.
The slider 63 is connected to the piston rod. The slider 63 is vertically movably supported by a lifting guide 64 provided on the base 11. A connecting plate 65 is provided at the upper end of the slider 63.
The closing plate 66 is attached via the.

When the elevating drive air cylinder 62 is extended, the slider 63 is raised, and the closing plate 66 is also raised integrally. When the closing plate 66 is raised, it rises along the front surface of the magnetic head sandwiched between the fixed chucks 12a and 12b and the movable chuck 13, and the left and right head chips 2a and 2b as shown in FIG. , The lower end corner 2aa of these head chips 2a, 2b
And 2bb is closed from the front side.

According to such a configuration, the base 1 of the magnetic head is sandwiched between the fixed chucks 12a and 12b and the movable chuck 13,
Thereafter, when the elevating drive air cylinder 62 is extended, the closing plate 66 is raised, and as shown in FIG. 3, the inner lower end corners 2aa and 2bb of the left and right head chips 2a and 2b.
Close the gap.

In this state, the wire 5 is wound around the head chips 2a and 2b as shown in FIGS. 6 to 14 described above.

In this case, since the inner lower end corners 2aa and 2bb of the head chips 2a and 2b are closed by the closing plate 66, the wire 5 is prevented from entering these gaps. This prevents problems such as the wire being wound around the corners 2aa and 2bb as indicated by imaginary lines 5a and 5b in FIG.

Therefore, a magnetic head having stable magnetic characteristics can be manufactured, and the occurrence of defective products is reduced. For this reason,
A troublesome work such as unwinding of a wire to recycle a defective product is lost, work efficiency is improved, and the yield is improved.

When the predetermined wire 5 is wound around the head chips 2a, 2b, the lifting / lowering driving air cylinder 62 is shortened, and the closing plate 66 is lowered via the slider 63. Then, the closing plate 66 escapes below the base 1 of the magnetic head, so that the magnetic head held between the fixed chucks 12a and 12b and the movable chuck 13 can be taken out.

Note that the present invention is not limited to the above embodiment.

That is, in the case of the above embodiment, the closing plate 66 is moved up and down along the front surface of the magnetic head, and the left and right head chips are moved.
Although the gap between the lower inner corners 2aa and 2bb of 2a and 2b is closed, the closing plate 66 may be rotated as shown in FIG.

In FIG. 4, a rack 71 is provided at the upper end of the slider 63, and the rack 71 meshes with the pinion 72. A rotation plate 73 is attached to the pinion 72, and a closing plate 66 is fixed to the rotation plate 73.

Therefore, when the lifting drive air cylinder 62 is extended, the slider 63 is raised, the rack 71 is raised, the pinion 72 is rotated clockwise, and the rotation plate 73 and the closing plate 66 are rotated in the same direction. Is done. Therefore, the closing plate 66 hits the front surface of the magnetic head, and the head chips 2a, 2
The gap between the lower inner corners 2aa and 2bb of b is closed from the front side.

In this case, the closing plate 66 is
Since it is in contact with the front surface of b, there is no gap in which the wire 5 enters, which is more effective.

[Effects of the Invention] As described above, according to the present invention, the opposing lower end corners of the adjacent head chips are covered with the closing member, so that the wires are not wound around the protruding portions of these lower end corners. For this reason, a magnetic head having stable magnetic characteristics can be manufactured, work efficiency is improved, and the yield is improved.

[Brief description of the drawings]

1 to 3 show an embodiment of the present invention.
1 is a sectional view showing a work holder of a winding device, FIG. 2 is a perspective view of a closing mechanism, FIG. 3 is a front view of a state in which a gap between magnetic heads is closed by a closing mechanism, and FIG. FIG. 5 is a front view showing a magnetic head, FIG. 6 et seq. Explains the prior art, and FIG. 6 is a schematic configuration of the entire winding device. A plan view,
FIG. 7 is a front view, and FIGS. 8 to 14 are perspective views for explaining a winding procedure. DESCRIPTION OF SYMBOLS 1 ... Magnetic head, 2a, 2b ... Head chip, 3 ... Winding hole, 4 ... Winding part, 5 ... Wire, 20 ... Tension mechanism, 25 ... Wire pin, 30a, 30b ... Wire insertion device, 50: Work holder, 11: Base, 12a, 12b: Fixed chuck, 13: Movable chuck, 60: Closing mechanism, 62: Air cylinder for vertical drive, 66: Closing plate, 71 ... Rack, 72 ... Pinion.

Claims (1)

(57) [Claims] A pair of head chips are provided at an end of a base so as to protrude from the base by a predetermined amount and are arranged side by side with a predetermined gap therebetween, and these head chips are annularly wound around a winding hole. A winding device for winding a wire around the wound portion of the magnetic head formed by winding a wire around the wound portion, supporting the base with a holder, A wire is inserted from one side to the other, and the drawn-out end of the wire inserted into the other side is relatively routed to one side of the winding hole that bypasses the periphery of the wound portion, and the wire is again drawn. In the winding device for a magnetic head, which is wound around the wound portion so as to be inserted from one side of the winding hole to the other side, the head chip is opposed to the holder supporting the base. Project from the base at the bottom corner A winding member for preventing a wire from being wound around a portion of the magnetic head.