JPH0734411B2 - Winding machine for magnetic head - Google Patents

Description

The present invention relates to a winding for automatically applying a winding to a minute winding hole of a magnetic core used in a magnetic head of a video tape recorder (VTR), for example. Regarding the machine.

[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 2a and 2b are joined is fixed to the top of a base plate 3 and between the half cores 2a and 2b. A wire 5 is wound around the winding hole 4 formed in. In this magnetic core 2, the winding hole 4 is set to be close to the gap 6 and its size is set to be small, whereby the magnetic characteristics are improved. As a result, the winding hole 4 is located above the winding portion 7 on the side surface of the magnetic head 1, and the winding is inclined and wound downward as it goes outward as shown in the drawing.

The magnetic head 1 as described above has been further miniaturized due to the high density of information recording, and in recent years, it is 0.35 × 0.3 mm □.
It is required to apply the winding of 0.01 mmφ to the winding hole 6 of about 5 to 10 times. Such work is extremely precise work, which has been conventionally performed manually, but it requires skill and is inefficient, so recently its mechanization has been attempted and various devices have been proposed.

The one disclosed in Japanese Patent Laid-Open No. 61-259515 is an example thereof. This is a rotatable core holding means for holding the core at a predetermined position and a wire insertion for inserting the wire into the winding hole of the core. And a winding means for winding the drawn wire around the outside of the core.

The insertion means includes an insertion chuck that grips a wire and pushes the wire toward the magnetic core of the holding base, and a wire tip support member that is installed in front of the insertion chuck. It is composed of vertically openable and closable members. A guide hole that is slightly larger than the wire is formed in the tip gripping member when it is closed. When both of these are closed to grip the wire and advance toward the magnetic core, the tip gripping member at a predetermined position. Is stopped and the wire is inserted through the guide hole and pushed out by the advancement of the insertion chuck.

[Problems to be Solved by the Invention] In the conventional technique as described above, since a fine wire is wound around a fine magnetic core, it is desirable that the extrusion position of the wire be strictly controlled. The smaller the guide hole of the tip grip member, the better. However, if the guide hole is small, it is easy for the wire to be caught in a portion other than the guide hole when the tip gripping member is closed. On the other hand, if the guide hole is made larger, such a situation will not occur easily, but the guide of the wire will not be strict, and the wire may not be pushed into the winding hole of the magnetic core, which may hinder the winding work. It was

[Means for Solving the Problems] In order to solve the above problems, according to the present invention, a holder for holding a magnetic core in an upright state and a tip of a wire are pushed into a winding hole of the magnetic core. In a magnetic head winding machine comprising a pushing device and a wire drawing device installed on the opposite side of the pushing device with respect to the holding table, the pushing device is located in front of the holding table. A pair of blade-shaped blades, each of which is composed of a guide portion for guiding the wire and a grip portion which is located rearward of the guide portion and which is installed so as to be capable of advancing and retreating with respect to the guide portion. The guide portion is formed of a body, and at least a pair of concaves and convexes along the wire direction are formed on the facing surface of the blade-like body so as to mesh with each other, and a V-shape extending in the wire direction on the tip surface of the convex portion. Unevenness meshes with the groove It is formed so as to make a guide hole for the wire when the wire is pulled. These V-shaped grooves are set so as to intersect at a position where a guide hole having an inner diameter slightly larger than the wire diameter when viewed from the wire direction is formed when the blade is closed, and the V-shaped groove The number should be at least one for each blade, and for stable wire guidance it is desirable to have at least two on one side and one on the other side in between.

[Operation] In the winding machine having such a configuration, when the wire is gripped by the pushing device, tension is applied to the wire,
With the blades of the guide part and the gripping part opened, these are lowered and the blades are closed. Then, the convex portions formed on the facing surfaces of the blade-shaped body mesh with each other, and the V-shaped grooves formed on the tip surfaces of the convex portions overlap each other when viewed in the wire insertion direction, and between the bottom portions of the grooves. A guide hole for inserting the wire is formed. Since the V-shaped groove is opened sufficiently wider than the size of the guide hole, the wire is centered by the slope of the V-shaped groove, and even if the position of the wire is deviated, it is surely moved to the position of the guide hole. It When the guide part with the guide hole formed in this way is set forward, and the wire is held by the holding part and moved forward, the wire is pushed into the winding hole of the magnetic core while being guided and positioned by the guide hole. Be done.

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

FIG. 1 shows the structure of the winding machine for a magnetic head of the present invention (only the right half). A holding table 10 for holding a magnetic core in the central portion of a base 8 spreading to the left and right, from above to behind Wires 7 are provided on both the left and right sides of the wire guide device 20 and the holding base 10.
Pushing device 50 for pushing the wire into the winding hole 6 and the winding holes 6 on both sides thereof.
A pulling device 80 for gripping and pulling out the wire 7 that has been inserted is sequentially arranged.

FIG. 2 shows a holding base 10, which is provided with a fixing portion 12 for holding the base plate 5 upright on a table 11 which is vertically movable and rotatable in a horizontal plane, and further fixes the base plate 5. A clamp 13 and a pressing device 15 for contacting the base plate 3 and eliminating rattling are provided. In addition, 14 is a wire clamp that presses the side surface of the core in order to prevent loosening of the wire in the winding, and a wire pressing member 14a made of silicon rubber or the like is attached to the tip, by a drive mechanism (not shown). It is designed to be opened and closed.

FIG. 3 shows the wire guide device 20. The wire guiding device 20 includes a first mounting plate 23 mounted on a support plate 21 standing upright at the center rear of the winding machine so as to be able to move up and down through a slide mechanism 22, and the first mounting plate 23. Slide mechanism 24
The second mounting plate 25 which is mounted so as to be able to move back and forth through the
And a guide die holding member 26 hanging down and attached to the front end of the second attachment plate 25. The guide die holding member 26 is a cylindrical portion 27 that is supported by a bearing at the tip of the second mounting plate 25 vertically and rotatably in a horizontal plane.
And a holding portion 28 at its lower end, and a guide die 29 is attached to the holding portion 28 with its position eccentric with respect to the rotation center of the tubular portion 27. A timing pulley 30 is attached to the cylindrical portion 27, and the timing pulley 30 is attached to the timing pulley 30.
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, and the tubular portion 27 is moved by the operation of this position switching cylinder 31. By reversing, the position of the guide die 29 is switched to a bilaterally symmetrical position with respect to the magnetic core 4. The slide mechanisms 22 and 24 in the up-down direction and the front-rear direction each include slide plates 34 and 35, drive cylinders 36 and 37, and a positioning stopper (not shown). A die opening / closing cylinder 41 is installed in the L-shaped metal fitting 40 at the tip of the second mounting plate 25, and the operating end of the cylinder 41 is inserted through the tubular portion 27 to open / close the guide die 29 (not shown). ), The guide die 29 is opened and closed by the operation of the die opening and closing cylinder 29. The guide die 29 is placed immediately before the magnetic core 4 and guides the wire 7 to the winding hole 6. A pair of flat plates 29a made of a super hard material are pin-connected to the holding portion 28 at the upper end so that they can be opened and closed. Thus, when closed, a guide hole 44 (see FIG. 12) including a tapered hole 42 and a fine hole 43 is formed.

A base plate 46, which is supported by a slide mechanism 45 so as to be movable left and right, is installed on the base 8, and a drive mechanism 49 including a drive motor 47 and a speed reducer 48 installed at an end of the base 8. It is designed to be moved left and right. A pushing device 50 and a drawing device 80 are provided on the base plate 46.

As shown in FIGS. 4 to 7, the pushing device 50 includes a first substrate 52 installed on the base plate 46 and a second substrate 54 moved up and down by a cylinder 53 installed on the first substrate 52. And a support cylinder 56 rotatably supported in the horizontal plane by a bearing 55 at the front end of the second board 54, and a pressing portion 57 attached to the lower end of the support cylinder 56. A stepping motor 60 connected to a timing pulley 58 fixed to the outer periphery of the support cylinder 56 via a timing belt 59 is installed on the upper surface of 54. The pushing part 57
Is a hand guide (guide part) 62 and a hand clamp (grasping part) on a frame 61 attached to the lower end of the support cylinder 56.
63 is provided, and a pair of blades 64, 6 respectively
5 is pivotally attached to the bases 66 and 69 at the upper end so that it can be opened and closed. A guide hole 67 is formed in a base portion 66 of the hand guide 62, and the guide hole 67 is inserted through a guide bar 68 installed in the frame 61 and slidably attached. On the other hand, hand clamp
The base 69 of 63 is fixed to the frame 61, and the hand clamp
A spring 70 is attached between the spring 63 and 63 so as to bias them in a direction in which they are separated from each other. The hand guide 62 is for guiding the wire 7. As shown in FIG. 8, the blade-like body 64 has a concave portion 71 on one side and a convex portion 72 on the other side in plan view. The shapes are such that they fit together.
Further, in its cross section, a V-shaped groove 73 is formed in the center of its thickness, and a hole for inserting the wire 7 is formed in the center of the V-shaped groove 73 with the concave portion 71 and the convex portion 72 engaged with each other. The size is set to The hand clamp 63 holds the wire 7 and holds the wire 7 with a constant force in a state where the two blade-shaped bodies 65 are engaged with each other. Therefore, the wire is sandwiched between the blades 64 and 65 in a state where they are separated from each other, and the drive motor 47 is operated to hold the pushing device 50 on the holding table 10.
When it is advanced to the side, the movement of the hand guide 62 is restricted by a stopper (not shown) provided in the wire guide device 20, and thereafter, only the hand clamp 63 moves forward so that the wire 7 is pushed out from the V-shaped groove 73 of the hand guide. Has become. Second
The L-shaped metal fitting 74 fixed to the tip of the board 54 has a hand guide 62
Further, a hand opening / closing cylinder 75 for opening / closing the hand clamp 63 is provided.

The drawing device 80 is installed on a drawing device board 82 movably installed on a guide rail 81 extending to the left and right of the holding table 10 on the base plate 46, and a jig cylinder 80a is installed on the base plate 46. The drawer device substrate 82 is provided and pushed out toward the holding table 10. The pull-out device 80 is composed of a suction device 83 and a tension hand 84, and the suction device 83 is a box-shaped suction portion main body 85 movably installed with respect to the pull-out device substrate 82 via a guide mechanism (not shown). The suction nozzle body 86 is provided so as to extend from the suction portion main body 85 to the holding table 10 side, and the rod end of the nozzle cylinder 87 installed at the end portion of the suction device substrate 82 is provided at the end portion of the suction portion main body 85. The parts are connected to move the suction part main body 85 to the left and right. The suction nozzle 86 communicates with an intake pump (not shown), and the base end of the suction nozzle 86 is tapered so as to widen toward the suction portion main body 85 side.
88 are formed. Suction nozzle 86 on the drawer device substrate 82
A pair of arms 89 are attached to both sides of the pin 90 at their proximal ends.
Are rotatably mounted in a horizontal plane, and the tips thereof are butted against each other at a position facing the tip of the suction nozzle 86 to form the tension hand 84. A spring member 89a is provided between the arms 89 for urging the arms 89 in the abutting direction.
The inclined surface 91 is formed in parallel with the taper 88 of the suction nozzle 86 on the surface facing toward, and when the suction nozzle 86 advances due to the operation of the nozzle cylinder 87, the taper 88 and the inclined surface 91 are engaged with each other and the spring The arm 89 is designed to be expanded against the bias of the member. As shown in FIG. 9, the suction nozzle 86 presses the inside of the tip of the thin pipe 92 from above and below with a plate-shaped jig to form a flat trumpet part 93 on the opening side and to press the pressing part. The cross section is formed in a slit 94 that extends laterally. The positional relationship among the slit 94, the V-shaped groove 73, and the winding hole 4 is such that the slit 94 comes to the target position of the winding hole 4 in the height direction as shown in FIG.
The hand guide 62 approaches from the left and right at the same time and guides the wire 5 on the slope of the V-shaped groove 73 to carry the wire 5 to the target position in the left and right direction.

As shown in FIG. 11, two wire holding devices 100 and 110 are installed near the holding table 10. In the first wire holding device 100, a U-shaped wire holding arm 103 including a horizontal drive shaft 101 and arm portions 102 on both sides thereof is provided with the arm portions 102 symmetrically positioned on both sides of the holding base 10. Has been. Further, a drive device (not shown) for rotating the drive shaft 101 and a stopper (not shown) for determining the lowered position of the arm portion 102 are attached, and as will be described later, the arm portion is wound when the wire 5 is wound. The wire 102 is lowered to hold the wire 5 and wound around the magnetic core 2 in a state where the wire 5 is inclined with respect to the horizontal.

Further, the second wire holding device 110 is installed on one side of the holding base 10 at a position closer to the first wire holding device 100, and as shown in the drawing, the drive shaft 111 and the arm portion 112 at the end thereof. And a driving device and a stopper (not shown). This second wire holding device 110
As will be described later, the winding work is one half core
When moving from 2a to the other half core 2b, both half cores 2
If the connecting wire 5a (see FIG. 18) that connects the windings a and 2b is located in the winding hole 4, it will hinder the subsequent winding work, so connect the connecting wire 5a to the lower end of the winding hole 4. It is to be located in the section.

Furthermore, in addition to the above-mentioned device, this wire winding machine also has a wire feeding device, a device for cutting the wire to an appropriate length, a device for exchanging a wound magnetic core with a new magnetic core, and other accessories. The target device is provided.

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

For simplification of the description, the process of supplying the wire 5 and winding start is omitted, and the wire 5 is one half core.
2a will be described starting from a state in which the winding is started from above the winding hole 4 and is wound several times.

The wound wire 5 is pressed by the wire clamp 14 on the side surface of the magnetic core 2 so that the wound portion will not be loosened even if the wire 5 is loosened.

Then, in the state in which the pushing device 50 grips the tip of the wire 5, the guide die 29 in the guide device 20 is attached to the base plate 3.
It is made to stand by above between the pushing device 50 and. Pushing device
After the backward movement of 50, the elevating drive cylinder 36 of the guide device 20 operates 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 base 10 and the hand clamp 63 holds the wire 5 in a state of being separated by a predetermined distance behind it and stands by, and the drive motor 47 operates in that state. The pushing portion 57 advances toward the holding table 10 ((b) in the figure).
reference). When the pushing portion 57 further advances, the hand guide 62
Is restricted from moving by a stopper provided in 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 through the taper hole 42 of the guide die 29
It is guided to 43, penetrates the guide hole 44, and protrudes to the other side from the winding hole 4 of the magnetic core 2.

On the other side of the magnetic core 2, the drawing device 80 stands by in a predetermined state. That is, the drawer motor substrate 82 is moved forward by the operation of the drive motor 47 (jig cylinder 80 a), the suction cylinder main body 85 is moved forward by the nozzle cylinder 87, and the taper portion 88 of the suction nozzle 86 is moved to the arm 89 of the tension hand 84. The arm 89 is pushed leftward and rightward by engaging with the inclined surface 91, and the tip of the suction nozzle 86 faces the magnetic core 2 (see FIG. 13 (a)). Then, the pushed wire 5 is sucked by the suction nozzle 86 and drawn inside the slit portion 94 (see FIGS. 12B and 12C). In this state, the nozzle cylinder 87 contracts, the arm 89 is closed, and the wire 5 is gripped (see FIGS. 12 (d) and 13 (b)). Wire 5 is a suction nozzle
The position is always kept constant because the arm 86 holds the position evenly in the vertical direction by 86 and is evenly closed from the left and right while being sucked and tensioned.

Thereafter, in the wire guide device 20 and the pushing device 50, the die opening / closing cylinder 41 and the hand opening / closing cylinder 75, respectively.
Is operated to open the guide die 29, the hand guide 62 and the hand clamp 63, and the lifting cylinders 36 and 53 are operated to allow the cylinders to move upward (see FIG. 12 (e)).

At this time, the side surface of the magnetic core 2 is held by the wire clamp 14, and the holding base 10 is tilted by about 45 degrees so that the side on which the wire 5 is held becomes far (Fig. 13 (C), 14th). (See Fig. (A))
82 is retracted, the wire 5 is pulled out from the winding hole 4, a certain tension is applied to the wire 5, and the wire 5 is wound around one surface of the magnetic core 2 (see FIG. 13 (d)). In this step, since the magnetic core 2 is inclined, the wire 5 bends so as to form an obtuse angle at the corner of the winding hole 4, and thus the wire 5 smoothly moves at the corner of the winding hole 4 of the magnetic core 2. The movement of the wire 5 is sufficiently tightened, and the wire 5 is prevented from being rubbed excessively at the corner of the winding hole 4 and broken.

The wire clamp 14 is released while the wire 5 is strained, and the drive shaft 1 of the first wire holding device 100 is released.
01 is rotated and the arm 102 descends to a predetermined position to press the wire 5 from above as shown in FIGS. 14 (b) and 15, where the holding table 10 rotates in the reverse direction by approximately 135 degrees. (See Figure 13 (e) and (e)). As a result, the wire 5 is wound so as to be inclined so that the outside of the surface of the magnetic core 2 is low. At this time, the magnetic core 2 is sequentially tilted while the wire 5 is strained, 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 portion of the magnetic core 2.

When one winding process is completed as described above, next, the winding is performed by the pushing device 50 and the withdrawing device 80 on the side different from the previous one. That is, in FIG. 12 to FIG. 14, in the state in which the left side withdrawing device 80 is retracted, the pushing portion 57 of the left pushing device 50 is brought close to the withdrawing device 80 side with each blade 64, 65 open. , Lowered. By closing the blades 64 and 65, the wire 5 is held by the hand clamp 63 while being guided by the hand guide 62 (see FIG. 14D). next,
The stepping motor 60 of the pushing device 50 operates to push the pushing portion 57.
Is inverted and the hand guide 62 and the tip of the wire 5 are directed to the holding base 10 (see FIG. 14 (e)). Here, the position switching cylinder 31 of the wire guide device 20 is actuated and the holding portion 28
Is reversed, the position of the guide die 29 is moved to the left side, and then lowered, and the guide die 29 is positioned to the left side of the magnetic core 2. The drive motor 47 operates to move the pushing device 50 toward the holding table 10. Hereinafter, the above process is repeated to apply the next winding.

The winding to the magnetic core 2 is the winding hole 4 of one half core 2a.
Starting from the upper end of the wire and moving to the lower end in sequence, if the tightening to the magnetic core 2 in the winding process is sufficiently performed and the tension of the wire 5 is controlled to an appropriate value as described above, the pushing position of the wire 5 is Even if it is not changed, the winding positions are sequentially displaced, and the wires are wound in a state where the wires 5 do not overlap and there is no gap therebetween.

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 is wound from bottom to top. At this time, as shown in FIG. 16, after the tip of the wire 5 pushed from one side is grasped by the pulling device 80, the second wire pressing device 110
Is activated, the arm portion 112 descends from above and presses the wire 5 downward, and in this state, the wire 5 is pulled out by the pulling-out device 80 to wind the crossover wire 5a that transitions between the half cores 2a, 2b. It should be located at the lower end of the 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 described in detail above, the present invention provides a holding base 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 the holding base. On the other hand, in a magnetic head winding machine provided with a wire drawing device installed on the opposite side of the pushing device, the pushing device is a guide portion that is positioned forward of the holding table and guides a wire, The guide portion is formed of a pair of blade bodies that are located rearward of the guide portion and that can be moved back and forth with respect to the guide blade body. The guide portion and the grip portion are each formed of a pair of openable and closable blade bodies. At least a pair of concavities and convexities along the wire direction are formed so as to mesh with each other on the facing surface of the blade body of the part, and when the concavo-convex meshes with the V-shaped groove extending in the wire direction at the tip surface of the convex part Make a guide hole for Since it is formed in this way, it is ensured that the wire inserted through the winding hole of the magnetic core is sandwiched by the guide parts from both sides and guided so that it can be inserted freely in the wire movement direction. It is improved enough. By making the guide part forward and gripping the wire with the gripping part and moving it forward, it is possible to push the thin and easily bent wire into the fine winding hole in a precisely positioned state, and even for a small magnetic core. The wire can be smoothly wound.

[Brief description of drawings]

1 is a plan view of an embodiment of the present invention, FIG. 2 is a perspective view of a holding base, FIG. 3 is a perspective view of a guide device, FIG. 4 is a perspective view of a pushing device and a withdrawing device, and FIG. Is a front view of the pushing device,
6 is a side view of the pushing device, FIG. 7 is a cross-sectional view of a hand clamp, FIG. 8 is a perspective view showing a blade of a hand guide,
FIG. 9 is a perspective view of the tip of the suction nozzle, FIG. 10 is a view showing the positional relationship between the slit portion of the suction nozzle, the V-shaped groove of the hand guide and the winding hole of the magnetic core, and FIG. 11 is a perspective view of the wire holding device. FIGS. 12 to 14 are schematic views showing a process of winding a wire, FIGS. 15 and 16 are perspective views showing the action of wire holding, FIG. 17 is a perspective view of a magnetic head, and FIG.
The figure is a perspective view of the magnetic core. 2 ... Magnetic core, 4 ... Winding hole, 5 ... Wire, 10 ...
Holding table, 50 ... Pushing device, 62 ... Hand guide (guide part), 63 ... Hand clamp (grasping part), 64,65 ... Blade, 71 ... Recess, 72 ... Convex part, 73 …… V-shaped groove, 80 ……
Drawer.

Claims (1)

[Claims] 1. A holding table 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 holding device installed on the opposite side of the pushing device with respect to the holding table. In a magnetic head winding machine including a wire drawing device, the pushing device includes a guide portion located forward of the holding base to guide the wire, and a guide portion located rearward of the guide portion. The guide portion and the grip portion each include a pair of blades that can be opened and closed, and the guide surface of the guide portion faces the wire. At least a pair of concavities and convexities are formed so as to mesh with each other, and a V-shaped groove extending in the direction of the wire is formed at the tip end surface of the convex part so as to form a guide hole for the wire when the concavities and convexities mesh. Specially Winding machine for a magnetic head according to.