JPH02119108A - Winding method for magnetic head - Google Patents

Abstract

PURPOSE:To enable smooth formation of a multiple-turn winding by making a magnetic core move with an inclination in the manner in which a wire is bent with an obtuse angle, at the corner of a wire winding hole. CONSTITUTION:A wire 5 is inserted into a wire winding hole 4 of a core 2, from one surface of the magnetic core 2 arranged vertically; the tip of the wire 5 is led out from the other surface side of the core 2; a tension force is applied to the wire 5 by inclining the core 2 in the manner in which the wire 5 is bent with an obtuse angle at the wire winding hole 4; the core is rotated in a horizontal plane, thereby winding a wire 5 around the core 2. Hence, when the wire is tightened, the wire moves smoothly at the corner of the wire winding hole 4 of the core 2, so that the wire is sufficiently tightened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head 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. The present invention relates to a winding method.

[Prior Art] FIG. 17 shows an example of a magnetic head l for a VTR, in which a magnetic core 2 in which a pair of half cores 2a and 2b are joined is fixed to the top of a base plate 3, and the half cores 2a, 2b are fixed to the top of a base plate 3.
A wire 5 is wound around the winding hole 4 formed between the wires. 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 the density of information recording increases, and in recent years, 0.35X0
．． It is required to wind a wire of 0.01 +++ mφ 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 mechanization has recently been attempted, and various devices have been proposed.

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 wire, a pull-out means for chucking the wire and pulling it out from the winding hole, and a winding means for winding the drawn-out wire around the outside of the core.

The above-mentioned winding means has a rotating chuck having an opening/closing claw installed on a rotating arm that can rotate around the core holding means so as to be able to slide freely along the rotating arm, and the wire pulled out from the winding hole. The rotating arm is rotated while one end is held by the rotating chuck, and the core is wound.

[Problems to be Solved by the Invention] However, in the conventional technology as described above, since it is necessary to rotate the rotating arm each time winding is performed, winding takes time and efficiency is not sufficiently improved. There were issues to be addressed.

In addition, in such a winding method, it is not possible to sufficiently tighten the wire after winding, so the wire cannot be wound smoothly around the fine magnetic core.
There were also problems such as rewinding.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes an insertion step of inserting a wire into a winding hole of a magnetic core from one side of an upright magnetic core, and a step of inserting a wire into a winding hole of a magnetic core. A drawing process involves pulling out the tip of the wire from the other side, a tightening process in which tension is applied to the wire by tilting the magnetic core so that the wire is bent at an obtuse angle in the winding hole, and a tightening process in which the magnetic core is rotated in a horizontal plane to remove the wire. The wire is wound by a winding step of winding it around the magnetic core. It is best to set the inclination angle to 45 degrees, that is, the bending angle of the wire to about 135 degrees.
It may be set to an appropriate value in consideration of winding efficiency, etc.

[Function] In the wire winding method having the above configuration, the wire is inserted through one side of the core in the insertion step, and then the tip of the inserted wire is pulled out in the withdrawal step.

At this time, the magnetic core is directly facing the moving direction of the wire, but the magnetic core is now tilted so that the wire is bent at an obtuse angle at the corner of the winding hole. This angle is usually about 45 degrees, and at this time the wire is 13 degrees.
Bend at a 5 degree obtuse angle. Then, pull the wire out until it hits the corner of the winding hole and becomes taut, then apply further appropriate tension. Then, the wire is tightened while rubbing against the corner of the winding hole. Here, since the wire forms an obtuse angle in the winding hole, an appropriate tension is applied to the last part of the wire that has already been wound, and the wire is sufficiently tightened. Moreover, there is no local stretching of the wire, and breakage or the like is prevented. When the holding base is rotated half a turn, half of the wire is wound around the half core, and by repeating this process in sequence, a smooth winding is performed over a large number of turns.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration (only the right half) of a winding machine for a magnetic head used in the winding method of the present invention, in which a holding stand lO1 holds a magnetic core in the center of a base 8 that extends left and right.
From above to the rear, there is a wire guide 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 on both sides for gripping and pulling out the wire 7 inserted through the winding hole 6. Arranged sequentially.

FIG. 2 shows the holding base 10, which is provided with a fixing member 12 for holding 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 13 is provided, and a pressing device 15 is provided for contacting the base plate 3 to eliminate play. 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.
is attached, and this 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 ramp 25. When activated, the cylindrical portion 27 is reversed and the position of the guide die 29 is switched to a position symmetrical 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 in the L bracket 40 at the tip of the second mounting plate 25, and the operating end of this cylinder 41 is inserted through the cylindrical part 27 to open/close the guide die 29 (the path shown in the figure). ), and the guide die 29 is opened and closed by the operation of this 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 the upper end 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 hunt guide 62 is for guiding the wire 7, and its blade-shaped body 64 has one recess 71. The other serves as a convex portion 72, and these 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 WIt73 has a concave portion 71 and a convex portion 7.
The dimensions are set such that a hole large enough to insert the wire 7 is formed in the center when the wires 2 are engaged with each other. The hand clamp 63 is for clamping the wire 7 and has a double-edged body 6.
The wire 7 is gripped with a constant force when the wires 5 are engaged with each other. Therefore, when the wire is sandwiched between the blade-shaped bodies 64 and 65 with the two separated and the drive motor 47 is activated to advance the pushing device 50 toward the holding table IO, the hand guide 62 is inserted into the wire guiding device 20. Movement is regulated by a stopper (not shown), and from then on, the hand clamp 63
The chisel moves forward and the wire 7 is the hand guide.
It is designed to be pushed out from 3. An L-shaped metal fitting 74 fixed to the tip of the second board 54 is provided with a hand opening/closing cylinder 75 for opening and closing the hand guide 62 and hand clamp 63.

The drawing device 80 is mounted on a holding table l on the base plate 46.
A knob cylinder 80a is provided on the base plate 46 to move the drawer device board 82 to the holding base IO. 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 drawing device board 82 at the end of the suction unit main 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. The tension hands 84 are formed by butting each other. A spring stamp member 89a is provided between the arms 89 to urge 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 91 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 stamp material. Arm 89 can be expanded.

The suction nozzle 86 is made by pressing the inside of the tip of a small-diameter pipe 92 from above and below with a plate-like jig, as shown in FIG. The cross section is formed into a horizontally expanding slit 9.1. 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.

Furthermore, as shown in Fig. 11, a holding stand! 2 near 0
Two wire holding devices 100 and 110 are installed. First wire holding device lo.

In the figure, a U-shaped wire holding arm +03 consisting of a horizontal drive shaft 101 and arm parts 102 on both sides is connected to the arm part 102.
are provided symmetrically on both sides of the holding table lO. A drive device (not shown) for rotating the drive shaft +01 and a stopper (not shown) for determining the lowering position of the arm 102 are attached, and as will be described later, when winding the wire 5, The arm portion 102 is lowered to hold down the wire 5, and the wire 5 is wound around the magnetic core 2 in an inclined state with respect to the horizontal.

Further, the second wire holding device 110 is installed on one side of the holding table 10 at a position closer to the first wire holding device 100, and as shown in the figure, the second wire holding device 110 is connected to the drive shaft 1.11 and the arm at the end thereof. 112, and includes a drive device and a stopper (not shown). As will be described later, this second wire holding device 110 is used when the winding operation is transferred from one half core 2a to the other half core 2b.
If the crossover wire 5a (see Fig. 18) that connects the windings of both half cores 2a and 2b is located in the winding hole 4, it will obstruct the subsequent winding work, so It is for positioning at the lower end of the hole 4.

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 held down by a wire clamp 14 on the side surface of the magnetic core 2, so that even if the wire 5 becomes loose, the wound portion will not become loose.

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 retreats, the elevating drive cylinder 36 of the guide device 20 is operated to lower the guide die holding member 26 and stop 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 guide 62, and the drive motor 47 is activated in this state. The pushing part 57 moves forward toward the holding base 10 (see Qu in FIG. 2). 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 moves forward and pushes the wire 5 through the V-shaped groove 73 of the hand guide 62. This results in
The tip of the wire is guided from the tapered hole 42 of the guide die 29 to the fine hole 43, passes through the guide hole 44, and projects from the winding hole 4 of the magnetic core 2 to the other side (the above is the insertion step).

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 out 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 kept in a constant position in the vertical direction by the suction nozzle 8G, and is gripped by the arm 89 that closes equally from the left and right sides while being sucked and tensioned, so that its position is always kept constant. (This is the drawing process).

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 11 and the hand opening/closing cylinder 75, respectively.
2 and the hand clamp 63, and lift the lift nolinder 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 10 is tilted approximately 45 degrees so that the side on which the wire 5 is held is further away (first
3(C) and FIG. 14(A)), in this state, the drawing device board 82 is moved back and the wire 5 is drawn out from the winding hole 4, and a certain tension is applied to the wire 5, so that it becomes magnetic. It is wound around one surface of the 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. As a result, the wire 5 is sufficiently tightened, and the wire 5 is prevented from rubbing excessively at the corners of the winding hole 4 and being disconnected (the above is the tightening step).

The wire clamp 14 is released with the wire 5 under tension, and the first wire holding device I ¥100
The drive shaft 101 of is rotated, the bowl hitter 102 is lowered to a predetermined position and presses the wire 5 from above as shown in FIGS. It is rotated by 135 degrees (see Figure 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 under tension, so that the wire 5 is sufficiently tightened in the same manner as described above (the above is the winding process).

When the magnetic core 2 returns to the reference position, the wire 5 is wound once, and the wire clamp 14 is closed to fix the wound wire 5 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, when the left drawing device 80 is in the retreated state in FIGS. 12 to 14, the pushing part 57 of the left pushing device 50 moves toward the drawing device 80 side with each of the blades 64 and 65 open. He was brought closer and 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 operates to
is reversed, 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 and the pushing device 50 is moved toward the holding table IO. 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 tip of the wire 5 pushed in from one side is grasped by the pulling device 80, the second wire holding device +10 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.

In the embodiment described above, the pushing device 50 for inserting the wire 5 and the bowing device 80 for pulling out the wire 5 do not rotate relative to the magnetic core 2, but are tightened by rotating the holding table IO. Since tilting in the process and rotation in the winding process are performed, the radius of rotation is small, so these processes can be performed quickly and the entire device can be downsized. In addition, since both of the above processes can be performed by a drive device that rotates the holding table 10, there is no need to install a new drive device for the tightening process, and the manufacturing cost is low and the operation process is simple. There is.

[Effects of the Invention] As described in detail above, the present invention includes the insertion step of inserting a wire into the winding hole of the magnetic core from one side of the upright magnetic core, and the insertion step of inserting the wire into the winding hole of the magnetic core from the other side of the magnetic core. A drawing process, a tightening process that applies tension to the wire by tilting the magnetic core so that the wire is bent at an obtuse angle in the winding hole, and a winding process, in which the wire is wound around the magnetic core while avoiding rotation of the magnetic core in a horizontal plane. When the wire is tightened, it moves smoothly at the corner of the winding hole of the magnetic core, and the wire is sufficiently tightened.
This prevents wire breakage due to excessive tension. Therefore, even a thin wire can be wound tightly and orderly, so even if the winding hole is small in the case of a layer or multiple layers, the winding can be done smoothly, the magnetic properties will not deteriorate, and the magnetic properties are aesthetically pleasing. Heads can be manufactured. The tightening process is performed by combining the wire drawing and the rotation of the magnetic core, which are performed in the drawing process and winding process before and after the tightening process, so there is no need to install any special equipment, and the work can be done easily. This has excellent effects such as not complicating the process.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a plan view of an embodiment of the apparatus used in the method of the present invention, FIG. 2 is a perspective view of a holding table, FIG. 3 is a perspective view of a guide device, and FIG. A perspective view of the pushing device and the pulling device, FIG. 5 is a front view of the pushing device, FIG. 6 is a side view of the pushing device, FIG. 7 is a cross-sectional view of the hand clamp, and FIG. 8 shows the blade of the hand guide. FIG. 9 is a perspective view of the tip of the suction nozzle, and FIG.
Figure 1 is a perspective view of the wire holding device, Figures 12 to 1 are
Figure 4 is a schematic diagram showing the process of winding the wire;
16 and 16 are perspective views showing the action of the wire presser, FIG. 17 is a perspective view of the magnetic head, and FIG. 18 is a perspective view of the magnetic core. 2...Magnetic core, 4...Winding hole, 5...
...Wire, lO...Holding stand, 50...
・Pushing device, 80... Pulling device. Applicant: Alps Electric Co., Ltd. - Company Representative: Masataka Kataoka

Claims (1)

[Claims] An insertion process in which the wire is inserted into the winding hole of the magnetic core from one side of the upright magnetic core, a drawing process in which the tip of the wire is pulled out from the other side of the magnetic core, and a wire is inserted into the winding hole at an obtuse angle. A method for winding a magnetic head, comprising a tightening step of applying tension to the wire by tilting it so as to bend it, and a winding step of rotating the magnetic core in a horizontal plane and winding the wire around the magnetic core.