JPH02119110A - Wire winding machine for magnetic head - Google Patents

Abstract

PURPOSE:To improve magnetic characteristics by changing the winding position of a wire so as to be matched with the shape and the structure of a head by pressing the wire in a winding process, and controlling the winding position on a magnetic core surface. CONSTITUTION:A wire pressing apparatus 100, which presses a wire 5 and controls the wire winding position on the magnetic core 2 surface in a winding process, is installed around a retaining stand 10. When the wire is retained under a constant tension, the contact position between a winding hole 4 and the wire 5 is not shifted even if the wire 5 is pressed from above at a suitable position by the apparatus 100. When the core 2 is rotated in the state that the wire 5 is inclined in this manner, the wire 5 is wound so as to incline toward the outside of the core 2. At the time of transferring from one of a half-core to the other, the position of crossover line is regulated by pressing the wire 5 upward or downward, and pushing-in or pulling-out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] 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 the density of information recording increases, and in recent years, 0.35X0
．． It is required to wind a wire of 0.01 mm+φ approximately 5 to 10 times in the 3 mm diameter winding hole 6. This type of work is very precise work, and has traditionally been done manually or requires skill, and is inefficient, so recently, efforts have been made to mechanize it, 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] By the way, as described above, in the magnetic head 1 of the type shown in FIGS. 17 and 18, the wire 5 to the magnetic core 2
The windings are sloped downward as they go to both sides, thereby improving the magnetic properties. In order to perform such winding by rotating the rotating chuck holding the wire 5 as described above, it is necessary to move the rotating chuck or the magnetic core upward or downward depending on the rotational position, which is mechanically extremely difficult. becomes complicated.

Furthermore, when the wire 5 is loosened by pushing it in or pulling it out, the wire 5 may jump upward and form a loop. When done, magnetic core 2
may engage with the protrusion of the In particular, if the crossover wire passes through the center of the winding hole 4 when moving from one half core 2a of the magnetic core 2 to the other half core 2b, it will interfere with the subsequent winding process.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a holding base that holds the magnetic core in an upright state rotatably in a horizontal plane, and a magnetic core that holds the tip of the wire. A pushing device for pushing the wire into the winding hole of the core, and a wire pulling device installed on the opposite side of the pushing device with respect to the holding table are provided, and the wire is inserted into the winding hole and held under tension while the magnetic core is pulled out. A winding machine for a magnetic head that rotates the wire to wind the wire, and a wire holding device is provided around the holding base to hold the wire during the winding process and to control the position at which the wire is wound around the magnetic core surface. It is.

[Function] In the winding machine with the above configuration, if the wire pulled out from the winding hole of the magnetic core is held under a certain tension, even if the wire is held down from above by the wire holding device at an appropriate position. , the contact position between the winding hole and the wire will not shift. When the magnetic core is rotated with the wire tilted in this manner, the wire is wound so as to be tilted toward the outside of the magnetic core. Further, when moving from one half core to the other half core, the position of the crossover wire is regulated by pressing the wire upward or downward and not pushing it in or pulling it out.

[Example] 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 a base 8 that spreads left and right, 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 thereof are arranged in a vertical arrangement. There is.

FIG. 2 shows a holding table 10, 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 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 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 (not shown). Further, a die opening/closing cylinder 41 is installed on the L-shaped fitting 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 (not shown). ), 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 left and right by a drive mechanism 49 equipped with a drive motor 47 and a deceleration fi4B 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 curved 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 cylinder 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-like body 64 has a concave portion 71 on one side when viewed from above, as shown in FIG. The other has 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 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 clamps the wire 7, and grips 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
．． When the wire is held between the wires 65 and the drive motor 47 is activated to advance the pushing device 50 toward the holding table 10, the hand guide 62 moves to 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 and closing the hand guide 62 and hand clamp 63 is provided on the one-shaped metal fitting 74 fixed to the tip of the second board 54 .

The drawing device 80 is mounted on a holding base I 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. A suction nozzle 86 is provided extending from the suction nozzle 85 toward the holding table IO side, and a nozzle cylinder 87 is provided at the end of the suction body 85 and a nozzle cylinder 87 is provided at the end of the drawing device board 82.
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 a suction nozzle 89 is provided on the surface of each arm 89 facing the suction nozzle 86.
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, against the bias of the spring member. Arm 89 can be expanded.

As shown in FIG. 9, 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-shaped jig, forming a flat trumpet portion 93 on the opening side, and forming a flat trumpet portion 93 on the opening side. The cross section is formed into a slit 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, the wire 5 approaches the target position in the left-right direction while being guided by the slope of the V-shaped groove 73.

Note that, as shown in FIG. 11, there are two
Two wire holding devices too and tto are installed. The first wire holding device l00 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 10. And drive shaft +0
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 at an angle to the horizontal.

Further, the second wire holding device 110 is installed on one side of the holding table 10 at a position closer than the first wire holding device 100, and as shown in the figure, the second wire holding device 110 has a drive shaft Ill and an arm portion 112 at the end thereof. It is comprised of a drive unit calibration stopper (path shown). As will be described later, this second wire holding device +10 uses a connecting wire 5 that connects the strings 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 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 where 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 guide 62 is directed toward the holding table 10, and the hand clamp 63 is on standby holding the wire 5 at a predetermined distance behind it, and in this state, the drive motor 47 is activated. The pushing part 57 moves forward toward the holding table 10 (see FIG. 2(b)). When the pushing part 57 further advances, the movement of the hand guide 62 is restricted by a stopper provided on the wire guide device 20, and only the hand clamp 63 moves forward to push the wire 5 through the V-shaped groove 73 of the hand guide 62. This allows the tip of the wire to pass from the tapered hole 42 of the guide die 29 to the fine hole 4.
3, passes through the guide hole 44, and projects from the winding hole 4 of the magnetic core 2 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 kept in a constant position in the vertical direction by the suction nozzle 86, and is gripped by the arms 89 that close evenly from the left and right sides while being sucked and tensioned, so that the position is 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 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 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 lOO 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, is held down from above, and the holding table IO is rotated approximately 135 degrees in the opposite direction (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 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, 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 tip of the wire 5 pushed in from one side is grasped by the pulling device 80, the second wire holding device 110 is activated, and the arm portion 112 descends from above to direct the wire 5 downward. Hold it down, and in that state pull out the wire 5 with the pull-out 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 includes a holding base that holds the magnetic core in an upright state so as to be rotatable in a horizontal plane, and a pusher that pushes the tip of the wire into the winding hole of the magnetic core. A device and a wire pulling device installed on the opposite side of the pushing device with respect to the holding base are provided, and the wire is inserted into the winding hole and held under tension while rotating the magnetic core to wind the wire. In this magnetic head winding machine, a wire holding device is installed around the holding table to hold the wire during the winding process and control the position of the wire winding around the magnetic core, thereby improving the shape and structure of the magnetic head. You can change the winding position of the wire according to the situation. Therefore, for a magnetic core with a large curvature of the magnetic tape sliding surface, such as a magnetic head for a VTR, the winding hole should be located near the tape sliding surface and the size of the winding hole should be small. In order to improve the magnetic properties, the windings can be arranged so as to be inclined toward both sides. Further, when transferring the winding from one half core to the other half core, it is possible to prevent the crossover wire from being located so as to block the winding hole, and other excellent effects are achieved.

[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, lO...Holding stand, 50...
... Pushing device, 80 ... Pulling device, 100 ... First wire holding device, +10.
...Second wire holding device.

Claims (1)

[Claims] A holding stand that holds the magnetic core in an upright position and rotatable in a horizontal plane, a pushing device that pushes the tip of the wire into the winding hole of the magnetic core, and a holding stand that is installed on the opposite side of the holding stand from the pushing device. In a winding machine for a magnetic head, the wire is inserted into a winding hole and held under tension while the magnetic core is rotated to wind the wire. A winding machine for a magnetic head, characterized in that it is provided with a wire holding device that holds the wire during the winding process and controls the position at which the wire is wound around the magnetic core surface.