JP3393368B2 - Transformer winding method and device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding method and device for a transformer, and more particularly to a winding method and device for a transformer suitable for winding of a wire wound type chip balun transformer or the like.

[0002]

2. Description of the Related Art In recent years, a balun transformer has been used as a transformer for connecting an unbalanced circuit and a balanced circuit and for matching impedance between circuits for the purpose of connecting an electronic circuit.

FIG. 14 is a circuit diagram of this type of balun transformer, in which windings a, a'b, b 'having the same number of turns are provided in a magnetic core, and a pair of left two terminals is an unbalanced terminal, The set of three terminals on the right is a balanced terminal. As the magnetic core, a drum type ferrite core with an intermediate collar having a plurality of winding grooves is used.

[0004]

By the way, with the miniaturization of electronic devices, a surface mount type wire wound chip balun transformer has been proposed by the present applicant in Japanese Patent Application No. 9-148490. Since such a transformer is small, winding work is troublesome and automation of winding is desired.

In view of the above points, the present invention has an object of providing a winding method and apparatus for a transformer capable of automating the winding work of a small-sized transformer having a plurality of winding grooves such as a winding type chip balun transformer. And

Other objects and novel features of the present invention will be clarified in the embodiments described later.

[0007]

In order to achieve the above object, a winding method for a transformer according to the present invention comprises winding two wires at the same time on a drum type core having two or more winding grooves. , One wire is provided with a loop so as to pass between adjacent winding grooves, and the other wire is provided so as to pass between the adjacent winding grooves without providing a loop,
After the winding is finished, each wire end is fixed to the side surface of the drum type core while applying tension to each wire.

In the winding method for the transformer, the drum core may be fixedly held, and nozzles for feeding the two wires may be wound around the drum core.

Alternatively, nozzles for feeding the two wires may be fixed, and the drum core may be rotated for winding.

The transformer winding device of the present invention comprises a core holding means for holding a drum core having two or more winding grooves, a nozzle for feeding each of the two wires, and a winding of the two wires. First to hold each of the start side edges
Group of wire chucks, a second group of wire chucks that respectively hold the ends of the two wires on the winding end side, and a third group of wire chucks that hold one wire loop between adjacent winding grooves. It is configured to include a wire chuck.

In the winding device for the transformer, the wire chuck holds the wire between the end surface of the main body block and the wire retainer. The wire chuck holds the wire without slipping, and the wire chuck holds the wire in a first state. It is preferable to have a switchable state between the second state in which the slip is sandwiched.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a transformer winding method and apparatus according to the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 9, the transformer winding device includes core holding means 20 for holding a drum-type ferrite core 5 with an intermediate collar having a plurality of winding grooves as magnetic cores, and 2 It has nozzles 11 and 12 which respectively pay out the wires 1 and 2 (the wire 2 is shown by a dotted line to distinguish it from the wire 1), and wire chucks A to F.

The drum type ferrite core 5 to be wound here has an intermediate flange 8 in addition to the flanges 7 formed at both ends of the winding core 6, as shown in FIG. With one winding groove. Further, one side of the intermediate collar 8 is formed on the same surface as the winding core portion 6.

The core holding means 20 is a positioning member 2 for axially positioning the drum type ferrite core 5.
1 and a core chuck 22 that holds the innermost flange of the core 5 as viewed from FIGS. 4 to 8.

Here, the wire chucks D and E are the first group of wire chucks which respectively hold the winding start side ends of the two wires 1 and 2, and the wire chucks C and
F is a second group of wire chucks that respectively hold the ends of the two wires 1 and 2 on the winding end side, and the wire chucks A and B are arranged between the adjacent winding grooves shown in FIGS. 6 and 7. The third group of wire chucks respectively holds the intermediate loops L of the one wire 1 across.

The specific structure of the wire chucks A to F is shown in FIG. As shown in this figure, the wire chucks A to F include a body block 31 fixed to the wire chuck attachment plate 30 on the apparatus side in FIG. 1, a chuck shaft 32 penetrating the body block 31, and a wire holding step collar. 33, a push-down member 34 connected to the tip end of the chuck shaft 32, a roller 35 attached to the base end of the chuck shaft 32, and the first and second coil springs 3.
6 and 37, the wires 1 and 2 are sandwiched between the end surface of the main body block 31 and the collar 33 with the wire pressing step.

The chuck shaft 32 has a small diameter portion at an upper portion to which the wire pressing stepped collar 33 is fitted, and a step surface 32a is formed at a boundary between the large diameter portion and the small diameter portion.

The first coil spring 36 is arranged around the chuck shaft 32 between a spring receiver 38 (also serving as a support for the roller 35) fixed to the lower end of the chuck shaft 32 and the main body block 31, and the chuck shaft 32 is provided. The wire holding stepped collar 33 is strongly pushed down via the pushing-down member 34 by urging the pulling-down member 32 in a downward direction. When the first coil spring 36 operates, it is in the first state in which the wire is sandwiched between the end surface of the main body block 31 and the collar 33 with the wire pressing step without slipping. In other words, the first coil spring 36 holds the wire without slipping the first coil spring 36.
Functions as a first elastic member that generates the elastic force of.

The second coil spring 37 is arranged around the chuck shaft 32 between the lower surface of the push-down member 34 and the upper surface of the wire pressing stepped collar 33, and the wire pressing stepped collar 3 is formed.
Push down 3 with a relatively weak force. This second coil spring 3
When only 7 works, it is in the second state in which the wire is slidably clamped between the end surface of the main body block 31 and the collar 33 with the wire pressing step. In other words, the second coil spring 37 functions as a second elastic member that generates a second elastic force that holds the wire so that it can slip.

As shown in FIG. 2, in order to switch the state of the wire chuck, a chuck opening / closing member 39 is provided on the apparatus side, and when the chuck opening / closing member 39 is separated from the roller 35, a strong first coil is provided. The elastic force of the spring 36 allows the wire to be sandwiched between the end surface of the main body block 31 and the wire holding stepped collar 33 without slipping (the first state), and the wire can be pulled to be cut at a desired position.

When the chuck opening / closing member 39 pushes up the roller 35 so that the step surface 32a of the chuck shaft 32 comes in contact with the lower end 33a of the wire pressing stepped collar 33, slightly in front of it, substantially only the second coil spring 37 is provided. The wire can be sandwiched between the end surface of the main body block 31 and the collar with stepped wire pressing 33 by a relatively weak elastic force (the second state). In this case, even if the wire is pulled, it will not be broken, and it will be possible to pull the wire while tension is applied, or to move the wire chuck without cutting the wire, which is effective in automating the winding work described later. .

Further, the roller 35 is pushed up by the chuck opening / closing member 39, and the step surface 32a of the chuck shaft 32 is pushed.
When the lower end 33a of the wire pressing stepped collar 33 is pushed up, the wire pressing stepped collar 33 is lifted from the end surface of the main body block 31 to release the wire.

As shown in FIG. 8, the transformer winding device is provided with a cutter 40 for cutting the intermediate loop L of one wire 1 that crosses between adjacent winding grooves, and is also shown in FIG. A pair of pushers 50 for fixing the wire end after winding and a cutter pin 51 for cutting the wire with the edge of the pusher 50 as a fixed blade.
Is equipped with. The wires 1 and 2 delivered from the nozzles 11 and 12 are so-called cement wires, and are self-bonding conductive wires having a property that an insulating resin coating is bonded by heat or chemicals.

The winding operation of this embodiment will be described in the case of manufacturing a winding type chip balun transformer having a winding structure as shown in FIG.

As shown in FIG. 4, the positioning member 21 of the core holding means 20 positions the drum type ferrite core 5 in the axial direction, and the innermost flange 7 of the drum type ferrite core 5 is held by the core chuck 22. . Further, the winding start side end portions of the two wires 1 and 2 are chucked and held by the first group of wire chucks D and E, and the nozzles 11 and 12 are fed while the wires 1 and 2 are respectively fed out. The first winding groove is moved in the counterclockwise direction as indicated by an arrow P to perform the required number of windings.

When the winding of the drum-shaped ferrite core 5 into the first winding groove is completed as shown in FIG. 5, the nozzle 11 for feeding the wire 1 is moved to pass through the wire chuck B and the wire chuck A in this order. These wire chucks A and B are a third group of wire chucks provided to hold the intermediate loop L of one wire 1 that crosses between adjacent winding grooves. The wire chuck B and the wire chuck A are chucked in this order to form the intermediate loop L, and are guided to the second winding groove of the drum type ferrite core 5 by the nozzle 11. In addition, the wire 2 does not form a loop and the nozzle 12
Is guided to the second winding groove across (via) the intermediate collar 8. Thereafter, while winding the wires 1 and 2, respectively, both the nozzles 11 and 12 are moved clockwise around the second winding groove of the drum type ferrite core 5 as shown by an arrow Q to perform the required number of windings. .

When the winding to the second winding groove is completed, as shown in FIG.
The wires 11 of the nozzle 11 are chucked to the wire chuck C, and the wire 2 of the nozzle 12 is chucked to the wire chuck F as shown in FIG. These wire chucks C and F serve as a second group of wire chucks that respectively hold the ends of the two wires on the winding end side. In FIG. 8, the intermediate loop L is further cut by the cutter 40, and the wire chucks A and E are moved while applying tension (slip) to the wires 1 and 2 to prepare for the step after winding. FIG. 1 shows the positions of the wires 1 and 2 and the wire chucks A to F immediately after the winding. The wire chuck mounting plate 30 on which the wire chucks A and E are arranged is a slider that can move in the front-back direction, and the wire chucks A and E move from the virtual line position at the beginning of winding to the solid line position after the winding ends. ing.

For fixing the wire end after winding, FIG.
As described above, the pair of pushers 50 sandwich the both side surfaces of the collar 7 at both ends of the drum-type ferrite core 5 together with the winding ends of the wires 1 and 2. At this time, hot air is blown to the winding ends of the wires 1 and 2 in contact with the side surface of the collar 7 to fix the wire end, which is a self-bonding lead wire, to the drum-type ferrite core 5 side, and at the same time, use the cutter pin 51 for extra The wire end is cut off using the edge of the pusher 50 as a fixed blade.
In this case, between wire chucks B and D is winding a in FIG. 14, between wire chucks A and C winding a ′ in FIG. 14, between wire chucks E and F winding b and b ′, and winding b. , B'is an intermediate connection point where the wire 2 straddles the side surface of the intermediate collar 8.

FIGS. 10 to 12 show a winding type chip balun transformer after winding the wires 1 and 2 and treating the wire ends. Part of the side surfaces of the flanges 7 and 8 of the drum type ferrite core 5 to which the wire ends are fixed. The terminal electrode 6 of the conductor film in advance
0 is adhered and formed, and each wire 1, 2 terminal and the terminal electrode 60 are soldered and connected in a later soldering step.

According to this embodiment, the following effects can be obtained.

(1) It is possible to automate the winding work of a winding type chip balun transformer, which is small in size and the winding work is troublesome by manual work.

(2) Each wire chuck clamps the wire between the end surface of the main body block 31 and the stepped collar 33. The wire chucks in the first state in which the wire is clamped without slipping, and the wire can be freely slipped. It is possible to switch between the second state where it is clamped in the wire, and it is possible to move while applying tension to the wires 1 and 2, which can greatly contribute to the automation of the winding work of the wire wound type chip balun transformer, and the structure of the winding device can be simplified. It can also be achieved.

In the above embodiment, the drum type ferrite core 5 is fixedly supported, and the nozzles 11 and 12 for feeding the wires 1 and 2 circulate around the core.
On the contrary, the drum type ferrite core side may be rotated while fixing the nozzle for feeding the wire. An embodiment in this case is shown in FIG. In this figure, a core holding means 20 for holding the drum-type ferrite core 5 includes a positioning member 21 for axially positioning the drum-type ferrite core 5 and a core chuck 2 for holding the innermost flange of the core 5.
2 and both are attached to the rotary shaft 23, and rotate with the rotation of the rotary shaft 23.

Of the wire chucks A to F, the first one for holding the winding start side end portions of the two wires 1 and 2 respectively.
The wire chucks D and E of the group, and the wire chucks A and B of the third group that respectively hold the intermediate loop L of the one wire 1 that crosses between adjacent winding grooves are at least the rotary shaft 23.
It is designed to rotate with it. The wire chucks A, B, D, and E are attached to the sliders 24 that rotate integrally with the rotary shaft 23, and can be moved in the front-rear direction. The second group of wire chucks C and F that respectively hold the end portions of the two wires 1 and 2 on the winding end side may not necessarily be a mechanism that rotates together with the rotation shaft 23. However, the wire chuck C can be moved back and forth by the slider 25. In the figure, the solid line position of each wire chuck is the winding possible state, and the virtual line position is the winding completion state.

In the embodiment of FIG. 13, the nozzles 11, 1 are
The winding work of the wire wound type chip balun transformer can be carried out similarly to the above-mentioned embodiment except for the difference between the winding of 2 and the rotation of the drum type ferrite core 5, and the two wires are not twisted. There is also an advantage that winding is possible. If the wire diameter is large, it is advantageous for making the product thinner. However,
In terms of equipment, the entire drum-type ferrite core side must be rotated, which makes the structure complicated.

Even in the case of a drum type core having three or more winding grooves, winding processing can be performed by repeating the winding described in the above embodiment.

Although the embodiment of the present invention has been described above, it is obvious to those skilled in the art that the present invention is not limited to this and various modifications and changes can be made within the scope of the claims. Ah

[0039]

As described above, according to the present invention,
There is an advantage that it is possible to automate the winding work for a magnetic core having a plurality of winding grooves, such as a winding type chip balun transformer, which is small in size and the winding work is troublesome.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a transformer winding method and apparatus according to the present invention, showing a state immediately after winding of a wire around a core.

FIG. 2 is a vertical cross-sectional view showing the structure of the wire chuck used in the embodiment.

FIG. 3 is a perspective view showing an example of a drum-type ferrite core to which winding is applied in the embodiment.

FIG. 4 is a perspective view showing a winding process for the first winding groove of the drum type ferrite core.

FIG. 5 is a perspective view showing a winding end state with respect to a first winding groove.

FIG. 6 is a perspective view showing a winding step for the second winding groove after the formation of the intermediate loop.

FIG. 7 is a perspective view showing a winding end state with respect to a second winding groove.

FIG. 8 is a perspective view showing a movement operation of the wire chuck after winding is completed with respect to the second winding groove.

FIG. 9 is a plan view illustrating a fixing process of wire ends after winding on a drum type ferrite core.

FIG. 10 is a plan view of a winding type chip balun transformer in which winding and terminal fixing processing is performed.

FIG. 11 is a front view of the same.

FIG. 12 is a rear view of the same.

FIG. 13 is a plan view showing another embodiment of the present invention.

FIG. 14 is a circuit diagram of a wire wound chip balun transformer.

[Explanation of symbols]

1, 2 wire 5 Drum type ferrite core 6 winding core 7 Tsuba 8 middle tsuba 11, 12 nozzles 20 core holding means 21 Positioning member 22 Core chuck 23 rotation axis 30 Wire chuck mounting plate 31 body block 32 chuck axis 33 Wire holding stepped collar 34 Depressing member 35 roller 36,37 coil spring 40 cutter 50 pushers 51 cutter pin 60 terminal electrode A to F wire chuck

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Michio Kato 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDC Inc. (56) References JP-A-10-124185 (JP, A) (58) Survey Areas (Int.Cl. ⁷ , DB name) H01F 41/06

Claims (5)

(57) [Claims] 1. A drum-shaped core having two or more winding grooves, in which two wires are wound simultaneously, one wire is provided with a loop to pass between adjacent winding grooves, and the other wire is Winding each wire so as to pass between the adjacent winding grooves without providing a loop, and fixing each wire end to the side surface of the drum core while applying tension to each wire after winding. Winding method of a transformer characterized by. 2. The winding method for a transformer according to claim 1, wherein the drum-shaped core is fixedly held, and nozzles for feeding the two wires are wound around the drum-shaped core around the nozzle. 3. The winding method for a transformer according to claim 1, wherein nozzles for feeding the two wires are fixed, and the drum core is rotated and wound. 4. A core holding means for holding a drum-shaped core having two or more winding grooves, a nozzle for feeding each of two wires, and a winding start side end portion of each of the two wires. A first group of wire chucks, a second group of wire chucks that respectively hold the end portions of the two wires on the winding end side, and a third group that respectively holds one wire loop that crosses between adjacent winding grooves. A winding device for a transformer, comprising: a group of wire chucks. 5. The wire chuck holds a wire between an end surface of a main body block and a wire retainer, and holds the wire without slipping.
The winding device for the transformer according to claim 4, wherein the state and the second state in which the wire is sandwiched so as to be slidable are switchable.