JPH02119112A - Wire winding machine for magnetic head - Google Patents

Abstract

PURPOSE:To form a suitable space around a wire, and prevent the damage caused by wire disconnection or the like by installing a pipe which continuously connects a suction nozzle sucking a wire tip arranged on the side opposite to an pushing-in apparatus of a winding machine with a suction pump, and forming a slit-type constriction part whose width is larger than the wire diameter, at the tip of the pipe. CONSTITUTION:A magnetic core 2 is vertically retained on a retaining stand 10 of a winding machine; the tip of a wire 5 is pushed in a wire winding hole of the core 2 by a pushing-in apparatus 50; a wire suction apparatus 80 is arranged on the opposite side of the pushing-in apparatus 50 with respect to the retaining stand 10. A suction nozzle 86 installed on the suction apparatus 80 is continuously connected with a suction pump by using a pipe 92; a slit-type constriction part 94, whose width is larger than the diameter of the wire 5, is formed at the tip of the pipe 92; a suitable space is formed around the wire 5; thereby preventing the stretching and disconnection of the wire 5 as the result of excessive tensile force applied to the wire 5.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a winding device for automatically applying winding to a minute winding hole in a magnetic core used in a magnetic head of a video tape recorder (VTR), for example. Regarding machines.

[Prior Art] FIG. 17 shows an example of a magnetic head 1 for a VTR, in which a magnetic core 2 in which a pair of half cores 2 a, 2 b are joined is fixed to the top of a base plate 3.
A wire 5 is wound around the winding hole 4 formed between the wires 2b and 2b. In this magnetic core 2, the winding hole 4 is set to be close to the gap 6 and its size is small, thereby improving the magnetic properties.

As a result, the winding hole 4 is located above the winding portion 7 on the side surface of the magnetic head l, and the winding is inclined downward toward the outside as shown in FIG.

The magnetic head l described above has become smaller and smaller as information recording becomes more dense, and in recent years, the size of the magnetic head has been reduced to 0.35x0.
．． It is required to wind a 0.01 mmφ wire approximately 5 to 10 times in the 3 mm diameter winding hole 6. This type of work is very precise and has traditionally been done by hand, but it requires skill and is inefficient, so recently attempts have been made to make this work more difficult, and various devices have been proposed. ing.

One example is the one described in JP-A-61-259515, which includes a rotatable core holding means for holding the core in a predetermined position, and a wire insertion means for inserting the wire into the winding hole of the core. The device is configured to include a means for chucking the wire and pulling it out from the winding hole, and a winding means for winding the drawn wire around the outside of the core.

The above-mentioned extraction means is equipped with a guide pipe (suction nozzle) installed facing the magnetic core so as to be able to move toward and away from the magnetic core. The tip is pulled out by suction. Then, one end of the wire pulled out from the winding hole is held by a rotating chuck of the winding means, and the rotating arm is rotated to wind the core.

[Problems to be Solved by the Invention] However, in the conventional technology as described above, the wire is chucked by the rotating chuck while the wire is being sucked by the suction nozzle.
The position and winding of the wire is important in determining the accuracy of the position. However, if the tip of the suction nozzle has a pipe shape with an inner diameter larger than the wire, there is a problem in that the wire vibrates due to the airflow, making it difficult to maintain a constant position. On the other hand, if the suction nozzle has approximately the same diameter as the wire, the tip of the nozzle will become clogged with the wire, and a large tension will be applied to the wire, potentially causing the wire to stretch or break.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a holding stand for holding the magnetic core in an upright state, and a pusher for pushing the tip of the wire into the winding hole of the magnetic core. In a magnetic head winding machine comprising a device and a suction nozzle that is installed on the opposite side of the holding table to the pushing device and sucks the tip of the wire, the suction nozzle is attached to the tip of the pipe from the diameter of the wire. It is constructed by forming a wide slit-shaped blocking part. The suction nozzle is installed so that the center of the blocking portion is aligned with the center of the winding hole.

Such a blocking portion can be formed by pressing the end of the small diameter pipe with a blade from above and below. As a device for further drawing out the wire, for example, a gripping mechanism is provided between the magnetic core and the suction nozzle, which can be opened and closed from the width direction of the blocking part.

[Operation] In the winding machine configured as described above, the wire pushed into the winding hole of the magnetic core by the pushing device is sucked by the suction nozzle from the other side of the magnetic core.

The opening of the suction nozzle is a slit-shaped obstruction wider than the diameter of the wire, and the wire is able to move through the obstruction without unnecessarily vibrating in the steady airflow formed in this obstruction. Located almost in the center of the section. The wire is positioned almost at the center of the winding hole in the suctioned state, and by grasping the wire from both sides in the width direction of the pinched part,
Positioning is also performed in a direction perpendicular to the width direction.

Examples] Hereinafter, the present invention will be described in detail with reference to the drawings.

Fig. 1 shows the configuration (only the right half) of the magnetic head winding machine of the present invention, in which a holding stand 1O1 holds a magnetic core in the center of 3 & 8 spreading from side to side, and a wire runs from above to behind it. A guiding device 20, a pushing device 50 for pushing the wire 7 into the winding hole 6 on both left and right sides of the holding table 10, and a pulling device 80 for grasping and pulling out the wire 7 inserted through the winding hole 6 on both sides are arranged in this order.

FIG. 2 shows the holding table IO, which is provided with a fixing part 12 that holds the base plate 5 upright on a table 11 that can be raised and lowered and rotated in a horizontal plane, and further fixes the base plate 5. A clamp I3 is provided, and a pressing device 15 is provided for contacting the base plate 3 and eliminating looseness. In addition, 14
is a wire clamp that presses the side surface of the core in order to prevent the wire from loosening during winding, and a wire holding member 14a made of flexible material such as silicone rubber is attached to the tip of the metal wire. It is configured to be opened and closed by a drive mechanism (not shown).

FIG. 3 shows the wire guide device 20. As shown in FIG. This wire guide device 20 includes a first mounting plate 23 that is attached to a support plate 21 erected at the rear of the center of the winding machine so as to be able to rise and fall freely via a slide mechanism 22, and The second mounting plate 25 is attached via a slide mechanism 24 so as to be freely forward and backward, and a guide die holding member 26 is attached to the front end of the second mounting plate 25 so as to hang down. This guide die holding member 26 consists of a cylindrical part 27 supported vertically and rotatably in a horizontal plane by a bearing at the tip of the second mounting plate 25, and a holding part 28 at the lower end of the cylindrical part 27. A guide die 29 is mounted eccentrically with respect to the center of rotation of the cylindrical portion 27. A timing pulley 30 is provided in the cylindrical portion 27.
The timing pulley 30 is connected via a timing belt 33 to a gear 32 rotated by a position switching cylinder 31 provided on the rear end side of the second mounting plate 25. By this operation, the cylindrical portion 27 is reversed, and the position of the guide die 29 is switched to a symmetrical position with respect to the magnetic core 4. In addition, the above-mentioned vertical and longitudinal sliding mechanisms 22 and 24 have sliding plates 34 and 35, respectively.
It is composed of driving cylinders 36 and 37 and a positioning stopper (path shown). Further, a die opening/closing cylinder 41 is installed on the L-metal fitting 40 at the tip of the second mounting plate 25, and the operating end of this cylinder 41 is inserted through the cylindrical portion 27 to open/close the guide gage 29 (the path shown in the figure). The guide die 29 is opened and closed by the operation of the die opening/closing cylinder 29. The guide die 29 is placed just before the magnetic core 4 to guide the wire 7 through the winding hole 6.
A pair of flat plates 29a made of a carbide material are pin-connected to the holding part 28 at their upper ends so that they can be opened and closed freely. (see Figure 12) is formed.

A base plate 46 is installed on the base 8 and is supported via a slide mechanism 45 so as to be movable left and right.
It is moved from side to side by a drive mechanism 49 equipped with a drive motor 47 and a speed reducer 48 installed at the end of the frame. A pushing device 50 and a pulling device 80 are provided on this base plate 46.

As shown in FIGS. 4 to 7, the pushing device 50 includes a first substrate 52 installed on a base plate 46, and a second substrate 54 that is raised and lowered by a cylinder 53 installed on the first substrate 52. And the bearing 5 at the front end of this second board 54
a support cylinder 56 rotatably supported in a horizontal plane by 5;
A push-in portion 57 is attached to the lower end of the support cylinder 56, and the upper surface of the second substrate 54 is provided with the support cylinder
A stepping motor 60 is connected via a timing belt 59 to a timing pulley 58 fixed to the outer periphery of the motor 6.
is installed. The pushing part 57 is connected to the support tube 56
A hand guide 62 and a hand clamp 63 are provided on a frame body 61 attached to the lower end of the frame, and a pair of blade-like bodies 64 and 65 are respectively pivotally attached to the base part 66 and 69 at the upper end so that they can be opened and closed. There is. A guide hole 67 is formed in the base 66 of the hand guide 62, and a guide bar 68 installed in the frame 61 is inserted through the guide hole 67 and is slidably attached. On the other hand, a base 69 of the hand clamp 63 is fixed to the frame 61, and a spring 70 is attached between the hand clamp 63 and the hand clamp 63 to urge them apart. The hand guide 62 is for guiding the wire 7, and its blade-shaped body 64 has a concave portion 71 on one side and a convex portion 72 on the other side in plan view, as shown in FIG. They are shaped to fit into each other. In addition, in its cross section, there is a V-shaped groove 7 in the center of its thickness.
3 is formed, and this V-shaped groove 73 is set to a size such that a hole large enough to insert the wire 7 is formed in the center with the concave portion 71 and the convex portion 72 engaged with each other. The hand clamp 63 is for clamping the wire 7, and is configured to grip the wire 7 with a constant force in a state where the double-edged members 65 are engaged with each other. Therefore, the blade-shaped body 64
．． 65 , and when the drive motor 47 is actuated to advance the pushing device 50 toward the holding table 10 , the hand guide 62 pushes against the stopper (path shown) provided on the wire guide device 20 .
After that, only the hand clamp 63 moves forward and the wire 7 is pushed out from the V-shaped groove 73 of the hand guide. A hand opening/closing cylinder 75 for opening/closing the hand guide 62 and the hand clamp 63 is provided on the L-shaped metal fitting 74 fixed to the tip of the second board 54 .

The drawing device 80 is mounted on a holding table l on the base plate 46.
A jig cylinder 80a is provided on the base plate 46 to move the drawer device board 82 onto the holding base lO. It is designed to push out toward the target. The pull-out device 80 includes a box-shaped suction unit main body 85 that is installed to be movable left and right with respect to the pull-out device board 82 via a guide mechanism including a suction device 83 and a tension hand 84, and this suction unit main body. 85 and a suction nozzle 86 extending from the holding table IO side, and a nozzle cylinder 87 installed at the end of the drawer board 82 at the end of the suction body 85.
The rod end portions of the suction section main body 85 are connected to each other so that the suction section main body 85 can be moved from side to side. The suction nozzle 86 is connected to a suction pump (not shown), and a taper 88 is formed at the base end of the suction nozzle 86 so as to become wider toward the suction section main body 85 side. On both sides of the suction nozzle 86 on the extraction device board 82, a pair of arms 89 are attached at their base ends by pins 90 so as to be rotatable in a horizontal plane, and their tips are positioned facing the tip of the suction nozzle 86. They are butted against each other to form the tension hand 84. A spring member 89a is provided between the arms 89 to bias them in the direction of abutting each other, and on the surface of each arm 89 facing the suction nozzle 86, the suction nozzle 8
A slope 9l is formed parallel to the taper 88 of No. 6, and when the suction nozzle 86 moves forward due to the operation of the nozzle cylinder 87, the taper 88 and the slope 9l engage, resisting the bias of the spring member 89a. The arm 89 can be expanded. As shown in FIG. 9, the suction nozzle 86 is made by pressing a slightly inside side of the tip of a small diameter pipe 92 from above and below with a plate-shaped jig, forming a flat trumpet 93 on the opening side and a pressing part. The cross section is formed into a slit (blocking portion) 94 that spreads laterally. The positional relationship between the slit 94, the V-shaped groove 73, and the winding hole 4 is as shown in FIG. At the same time, they approach and guide the wire 5 on the slope of the V-shaped groove 73 while carrying the wire 5 in the left-right direction to the target position.

Note that, as shown in FIG. 11, there are two
Two wire holding devices 100 and 110 are installed. The first wire holding device 100 has a horizontal drive shaft 10
A U-shaped wire holding arm 103 is provided with the arm portions 102 symmetrically positioned on both sides of the holding table IO. And the drive shaft 10
A drive device (path shown) for rotating the wire 5 and a stopper (path shown) for determining the lowering position of the arm 102 are attached. The wire 5 is held down and wound around the magnetic core 2 in an inclined manner with respect to the horizontal direction.

Further, the second wire holding device +10 is mounted on one side of the holding table IO as the first wire holding device! 00, and as shown in the figure, it is composed of a drive shaft 111 and an arm part 112 at the end thereof, and is equipped with a drive device and a stopper (path shown in the figure). As will be described later, this second wire holding device 110 uses a crossover wire 5 that connects the windings of both half cores 2a and 2b when the winding operation is transferred from one half core 2a to the other half core 2b.
If a (see Fig. 18) is located inside the winding hole 4, it will obstruct the subsequent winding work.
It is intended to be located at the lower end of the

In addition to the above-mentioned devices, this winding machine also includes a wire feeding device, a device that cuts the wire to an appropriate length, a device that replaces the wound magnetic core with a new magnetic core, and other accessories. equipment is provided.

Hereinafter, the process of winding the wire using the winding machine configured as described above will be explained with reference to FIGS. 12 to 14.

In order to simplify the explanation, the process of supplying the wire 5 and starting winding will be omitted, and the explanation will start from the state where the wire 5 starts winding around one half core 2a from above the winding hole 4 and is wound several times. .

The wound wire 5 is wire clamped on the side of the magnetic core 2! 4, so that even if the wire 5 becomes loose, the winding will not loosen.

Then, in a state in which the tip of the wire 5 is gripped by the pushing device 50, the guide die 29 is placed on standby above between the base plate 3 and the pushing device 50 in the guiding device 20.

After the pushing device 50 is retreated, the lifting cylinder 36 of the guide device 20 is operated, and the guide die holding member 26 is lowered and stopped at a predetermined position (see FIG. 12(a)). In the pushing device 50, the hand clamp 63 is on standby holding the wire 5 with the hand guide 62 facing the holding table IO side and a predetermined distance apart from the hand clamp 63.
In this state, the drive motor 47 operates, and the pushing part 57 moves forward toward the holding table 1O (see FIG. 2B). When the pushing part 57 further moves forward, the movement of the hand guide 62 is regulated by a stopper provided on the wire guide device 20.
Only the hand clamp 63 advances and pushes the wire 5 through the figure 7 17173 of the hand guide 62. As a result, the tip of the wire is guided from the tapered hole 42 of the guide die 29 to the fine hole 43, and is inserted through the guide hole 44 to form the magnetic core 2.
protrudes from the winding hole 4 to the other side.

On the other side of the magnetic core 2, a pull-out device 80 is waiting in a predetermined state. That is, the drawing device board 82 is advanced by the operation of the drive motor 47 (jig cylinder 80a), and the suction unit main body 85 is further advanced by the nozzle cylinder 87, and the tapered portion 88 of the suction nozzle 86 is moved forward.
engages with the slope 91 of the arm 89 of the tension hand 84, and the arm 89 is pushed apart to the left and right, and the suction nozzle 86
The tip of the magnetic core 2 faces the magnetic core 2 (see FIG. 13(a)). Then, the extruded wire 5 is sucked by the suction nozzle 86 and drawn inward through the slit portion 94 (see FIGS. 12(b) and 12(c)). In this state, the nozzle cylinder 87 is contracted, the arm 89 is closed, and the wire 5 is gripped (see FIG. 12(d) and FIG. 13(b)). The wire 5 is sucked by a suction nozzle 86 and held at a fixed position in the vertical direction (the center of the winding hole 4), and is held by an arm 89 that closes equally from the left and right sides while being sucked and tensioned. from,
Its position is always kept constant.

After that, in the wire guide device 20 and the pushing device 50,
The guide die 29 and the hand guide 6 are operated by operating the die opening/closing cylinder 41 and the hand opening/closing cylinder 75, respectively.
2 and hand clamp 63, and lift cylinder 36.
．． 53 to release it upward (see Figure 12 (e))
.

At this time, the side surface of the magnetic core 2 is held down by the wire clamp 14, and the holding stand IO is tilted approximately 45 degrees so that the side where the wire 5 is held down is further away (first
3(C) and FIG. 14(A)), in this state, the drawing device board 82 is retreated and the wire 5 is drawn out from the winding hole 4, and a certain tension is applied to the wire 5, so that the magnetic core 2 (see FIG. 13(d)). In this process, since the magnetic core 2 is inclined, the wire 5 bends to form an obtuse angle at the corner of the winding hole 4, so that the wire 5 smoothly forms an obtuse angle at the corner of the winding hole 4 of the magnetic core 2. movement, the wire 5 is sufficiently tightened, and the wire 5 is prevented from rubbing against the corners of the winding hole 4 and being broken.

The wire clamp 14 is released with the wire 5 under tension, and the drive shaft 101 of the first wire holding device 100 is rotated, and the arm portion 102 is lowered to a predetermined position to hold the wire 5 as shown in FIG. (b), as shown in Fig. 15, hold it down from above and rotate the holding base 10 counterclockwise approximately 135 degrees (see Fig. 13 (e) and (f)).
. Thereby, the wire 5 is wound on the surface of the magnetic core 2 at an angle so that the outside is lower. At this time, the magnetic core 2 is sequentially tilted while the wire 5 is kept under tension, so that the wire 5 is sufficiently tightened in the same manner as described above. When the magnetic core 2 returns to the standard position, the wire 5
h< Wound once, the wire clamp 14 is closed and the wound wire 5 is fixed to the side of the magnetic core 2.

When one winding process is completed as described above, the next winding is performed using the push-in device 50 and the pull-out device 80 on the side different from the previous one. That is, in a state where the left drawing device 80 is retracted in FIGS. 12 to 14, the pushing part 57 of the left pushing device 50 is brought close to the drawing device 80 side with each blade-shaped body 64, 65 open. , lowered. By closing the blades 64 and 65, the wire 5 is guided by the hand guide 62 and grasped by the hand clamp 63 (see FIG. 14(d)). Next, the stepping motor 60 of the pushing device 50 is activated to reverse the pushing part 57, so that the hand guide 62 and the tip of the wire 5 are directed toward the holding table IO (see FIG. 14(E)). At this point, the position switching cylinder 31 of the wire guide device 20 is actuated to reverse the holding part 28, and the position of the guide die 29 is moved to the left and then lowered to be located on the left side of the magnetic core 2.

The drive motor 47 is operated to move the pushing device 50 toward the holding table 10. Thereafter, the above-described process is repeated to apply the next winding.

The winding on the magnetic core 2 starts from the upper end of the winding hole 4 of one half core 2a and moves sequentially to the lower end, but as mentioned above, during the winding process, the magnetic core 2 is sufficiently tightened and the wire is If the tension of 5 is controlled to an appropriate value, the winding positions will be shifted sequentially without changing the pushing position of the wire 5, and the winding will be performed without overlapping the wires 5 and leaving no gaps between them. Ru.

After one half core 2a of the magnetic core 2 is wound a predetermined number of times from top to bottom, the other half core 2b
The winding is done from bottom to top. At this time, the 16th
As shown in the figure, after the pulling device 80 grips the tip of the wire 5 pushed in from one side, the second wire holding device 110 is activated, and the arm portion 112 descends from above to direct the wire 5 downward. The half core 2a is pressed down, and in this state, the wire 5 is pulled out using the drawing device 80.

The crossover wire 5a that transitions between the wires 2b and 2b is positioned at the lower end of the winding hole 4. This prevents the crossover wire 5a from interfering with the newly pushed wire 5 in the subsequent winding process.

[Effects of the Invention] As detailed above, the present invention provides a holding stand that holds the magnetic core in an upright state, a pushing device that pushes the tip of the wire into the winding hole of the magnetic core, and the holding stand that holds the magnetic core in an upright state. On the other hand, in a magnetic head winding machine that is equipped with a suction nozzle that is installed on the opposite side of the pushing device and that sucks the tip of the wire, the suction nozzle is placed at the tip of the pipe with a slit-like obstruction that is wider than the diameter of the wire. Since the wire is constructed by forming a section, it is possible to suction the wire with an appropriate gap around the wire, and avoid the possibility of the wire vibrating, making positioning difficult, or placing excessive pressure on the wire. The tension prevents the wire from stretching or breaking. If the center of the pinched part is aligned with the center of the winding hole, positioning is achieved in at least one direction, and the wire is positioned by closing the arm from the width direction of the caught part. It can be easily grasped. Therefore, it is possible to quickly and smoothly wind a thin wire around the winding hole of a fine magnetic core using a relatively simple device configuration, which is an excellent effect.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a perspective view of a holding table, Fig. 3 is a perspective view of a guide device, Fig. 4 is a perspective view of a pushing device and a pulling device, and Fig. 5 is a front view of the pushing device,
FIG. 6 is a side view of the pushing device, FIG. 7 is a sectional view of the hand clamp, and FIG. 8 is a perspective view showing the blade of the hand guide.
Figure 9 is a perspective view of the tip of the suction nozzle, Figure 1θ is a diagram showing the positional relationship between the slit portion of the suction nozzle, the 7-shaped groove of the hand guide, and the winding hole of the magnetic core, and Figure 11 is a perspective view of the wire holding device. Figures 12 to 14 are schematic diagrams showing the process of winding the wire, Figures 15 and 16 are perspective views showing the action of the wire presser, Figure 17 is a perspective view of the magnetic head, and Figure 18. is a perspective view of a magnetic core. 2... Magnetic core, 4... Winding hole, 5...
...Wire, 10...Holding stand, 50...
...Pushing device, 86...Suction nozzle, 92.
...Pipe, 94...Slit part (blocking part).

Claims (1)

[Claims] A holding stand for holding the magnetic core in an upright state, a pushing device for pushing the tip of the wire into the winding hole of the magnetic core, and a pushing device installed on the opposite side of the holding stand from the pushing device. A winding machine for a magnetic head is equipped with a suction nozzle that suctions the tip of the wire using a suction pump. A winding machine for a magnetic head, characterized in that the winding machine is comprised of: