JP2854530B2 - Wound core transformer and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wound iron core transformer using a one-turn cut wound iron core made of an amorphous magnetic alloy ribbon, and a method for manufacturing the same. It is an object of the present invention to provide a wound iron core transformer and a method of manufacturing the same, which reliably prevent fragments of the core from invading into the winding and causing insulation breakdown.

[0002]

2. Description of the Related Art In recent years, various transformer cores using an amorphous magnetic alloy ribbon (hereinafter simply referred to as a magnetic ribbon) have been developed and put to practical use in power distribution transformers. The magnetic ribbon used as the transformer core is manufactured by rapidly quenching a melt of a magnetic alloy, and has very small iron loss and excellent magnetic properties. And when manufacturing the iron core of the transformer using the magnetic ribbon, a so-called one-turn generally provided with a joint such as a butt joint or a lap joint in one of the pair of yoke portions. Many cut-type wound iron cores are manufactured today. However, the magnetic ribbon, which is the core material of the wound core, is much thinner than the silicon steel strip that has been used before, and moreover,
When magnetic field annealing is performed to remove processing strain and improve core characteristics, it becomes extremely vulnerable.For example, when external force such as impact or vibration is applied to a wound core, a part of the core may be lost and fragments may be generated. was there.

[0003] For this reason, in the case of manufacturing a wound core using the magnetic ribbon, there is a manufacturing method described in, for example, Japanese Patent Publication No. 6-56819. This manufacturing method is shown in FIG.
This will be described with reference to FIGS. That is, for example, a circular iron core formed by continuously winding a magnetic ribbon a predetermined number of times,
The band-shaped core is cut at one location on its outer periphery and developed in a band shape, and then the band-shaped core is processed again into a circle while one end in the longitudinal direction of the band-shaped core is displaced in a stepwise manner. A cut-type wound core element body is formed, and this is further formed into a rectangular shape by a forming jig (not shown) to form a wound core 1 shown in FIG.
Alternatively, one or a plurality of magnetic ribbons may be sequentially cut into pieces each having a length corresponding to one winding of a wound core, and the strip-shaped core blank may be circularly wound by a winding machine (not shown). Turn to provide a wound core body, as described above, this wound core body,
The wound iron core 1 shown in FIG. 1 was formed by performing rectangular forming using a forming jig.

When the wound core element is in a circular state in the wound core 1 shown in FIG. 1, the outermost and innermost reinforcing frames a and b made of silicon steel strip are provided on the outermost and innermost circumferences. Are arranged in such a manner that the butting portions at the tips which are free ends on the joint portion c side of the wound core 1 are wrapped. And
The rectangular-shaped wound core 1 is fitted and held in a separately formed holding frame (not shown) to perform magnetic field annealing, thereby forming a rectangular state. When the formed holding frame is removed from the wound core 1 after annealing, the wound core becomes the reinforcing frames a,
b makes it possible to maintain a good rectangular state.

[0005] Next yoke portions d of the winding core 1, and insert the molding die 2 as shown in FIG. 2 between d _1, followed,
The plate-shaped mold plate 4 is press-fitted between the concave grooves 5 and 5 of the molding dies 2 and 3 to keep the wound core 1 in a rectangular state. Thereafter, an adhesive made of, for example, a cold-setting epoxy resin is applied to the laminated end surfaces of the pair of leg portions e, e of the wound iron core 1 at regular intervals to form an adhesive portion 6, and an adhesive portion 6 is provided. Adhesive part 6
The thin insulating paper is wound and attached to the legs e, e using
By winding an adhesive tape 7 for fixing the insulating paper on the outside, an insulation reinforcing portion 8 is formed on the leg iron portions e, e as shown in FIG. When the insulation reinforcing portions 8 are provided on the leg portions e, e, the molding dies 2, 3 and the template 4 are removed from the window of the wound core 1. Instead of winding the insulating paper, the insulating reinforcing portion 8 is formed by bending a thick insulating member into a U-shape, and using the pair of insulating members so as to cover the laminated end surfaces of the leg iron portions e, e from both sides. It may be formed by covering.

[0006] From the wound core 1, forming dies 2, 3 and a mold plate 4
And the wound core 1 is the inner and outer reinforcing frames a, b
With the insulating reinforcing portions 8 formed on the leg portions e, e, the laminated end surface weakened by annealing can be prevented from being deformed or peeling off due to external force or the like. As a result, the core 1 including the iron legs e, e
The overall rigidity can be enhanced. Thereafter, the side of the yoke d having the joint c of the wound core 1 is opened at the position of the joint c. That is, as shown in FIG. 20, the wound core 1 is expanded in a U-shape using the joint c. on the other hand,
A winding 9 is arranged at a position corresponding to the wound iron core 1 expanded in a U-shape. In this state, a yoke part d having a joint c of the wound iron core 1 expanded in a U-shape is provided. The winding 9 is fitted into the core insertion hole f in one operation while facing the core insertion hole f.

When the leg portions e, e of the wound core 1 are inserted into the core insertion holes f of the windings 9, the expanded yoke portion d having the joint c is returned to the original state, and the yoke portion d is returned. To the condition before opening. Thereafter, as shown in FIG. 21, an insulating material 1a such as a spacer or a wedge is press-fitted into a gap between the axial end face of the winding 9 and the end face in the window of the wound core 1 so as to be pressed.
And the winding 9 are integrally fixed. After the winding core 1 is inserted into the winding 9 and assembly is completed, a quick-drying adhesive is applied to the laminated end face of the winding core 1 located outside the winding 9 on the side of the yoke portions d and d ₁ . The coated paper 10 made of a thin insulating material is attached to the application surface, and the assembly of the wound core 1 is completed. When the winding core 1 has been assembled, the winding core 1 is erected and its yoke portions d, d ₁
, And a clamp (not shown) is abutted, and these clamps are fastened to the winding core 1 with a winding retainer interposed between the clamp 9 and the axial end surface of the winding 9 to manufacture a winding core transformer.

[0008]

However, when a wound core transformer is manufactured using a one-turn cut type wound core according to the conventional technique, there are the following problems. (1) After the magnetic core 1 formed into a rectangular shape is subjected to magnetic field annealing, the side of the yoke part d having the joint c is opened, and the core 1 is expanded in a U-shape to insert the core insertion hole f of the winding 9. And a pair of legs e,
When inserting the e, the wound core 1 leg of section e, but e is covered with the insulating reinforcement portion 8, the yoke portion d, since the d ₁ not subjected also covering means anything like, wound When the expanded yoke portion d side of the iron core 1 is inserted from one of the iron core insertion holes f and pulled out from the other, the core 1 becomes very brittle due to magnetic field annealing. When the core 9 comes into contact with the wall surface of the core insertion hole f of the winding 9 or an external force is applied to the yoke portion d itself, innumerable pieces of the iron core are formed in the core insertion hole f.
It will fall into or be scattered around.

For this reason, the core 1 inserted into the winding 9 is reassembled after removing the fragments by a vacuum cleaner or the like. However, the fragments of the core remain in the core insertion holes f of the windings. In the case where the broken pieces have entered the inside of the winding 9 from the axial end face, it has been very difficult to remove the invading pieces. Therefore, if a piece of the iron core that has entered the winding 9 or the core insertion hole f contacts the conductive portion during operation of the winding core transformer or floats in the insulating oil, an interlayer short circuit accident of the winding 9 is induced. And there was a risk of causing insulation failure of the wound iron core transformer.

(2) As means for solving the problem with respect to the fragments of the iron core, for example, a wound iron core 1 after magnetic field annealing is used.
Is spread in a U-shape, and the entire surface of the wound core 1 is covered with a fiber cloth, or a box made of an insulating material such as insulating paper is put on the wound core 1 and assembled into the winding 9. Had gone. However, in the former, it is necessary to wind the fiber cloth around the whole wound core 1 when assembling the wound core 1,
After inserting the wound iron core 1 into the winding wire 9, when reassembling the yoke part d having the joint c, the fiber cloth at that portion is temporarily removed, and after the yoke part d is reassembled, the fiber cloth is renewed. Is wound or adhered, so that a large amount of time and labor is required for assembling the wound iron core 1, which is a major factor impeding the productivity of the wound iron core transformer.

In the latter case, it is necessary to manufacture and prepare a box to cover the wound core 1 in a separate step in advance, so that it takes time and effort, and when assembling the wound core 1, the box is first wound. The core 1 is inserted into only the leg portions e, e of the iron core 1 and the wound core 1 is inserted into the winding 9, and after the reassembly of the yoke d having the joint c is completed, the yoke d, d ₁ To the iron leg e,
e, it was time-consuming to prepare a large number of boxes of different sizes and to cover these boxes on the wound core 1, thereby increasing the productivity of the wound core transformer. There was a problem in trying to improve.

Further, in the manufacturing method disclosed in Japanese Patent Publication No. 6-56819, after reassembly of the yoke portion d having the joint c of the wound core 1, the yoke portions d and d _{1 of the} wound core 1 are performed. of an adhesive is applied in quick-drying the laminate edge, by attaching a cover sheet to the coated surface, the yoke portions d, if the crack in the laminate end face of d ₁ has occurred, the magnetic ribbon by its crack while debris is prevented from floating in the oil, in this case, yoke portion d, to solidify it by applying an adhesive to laminate the end face of the d _1, at the time of solidification of the adhesive to the core its retracted As a result of the application of the stress, there is a problem that the core characteristics, which is an advantage of the wound core made of a magnetic ribbon sensitive to the stress, deteriorates.

In view of the above-mentioned various problems, the present invention simplifies the work of covering the wound core with an insulating member, and also causes pieces of the core to enter the windings or float in the insulating oil. And a method of manufacturing the same.

[0014]

SUMMARY OF THE INVENTION According to the present invention, a one-turn-cut wound iron core made of an amorphous magnetic alloy ribbon is formed into a rectangular shape, and the wound iron core is subjected to magnetic field annealing. A thin leaf insulating member is wound around the leg iron portion to form an insulation reinforcing portion. The wound iron core in which the insulation reinforcing portion is formed on the leg iron portion is opened in a U-shape by opening a yoke portion side having a joint portion, and each of the opened yoke portions is covered with a protective cap.

Subsequently, a pair of glue margins are formed at a predetermined height around the periphery of the window hole through which the pair of leg irons individually penetrate, and the yoke side of the wound iron core having no joint is formed. Wide heat and oil resistance that can be covered sufficiently, for example,
A first covering cover made of an insulating member such as a fiber member or an insulating paper is connected to a joint having no bonding portion below the insulating reinforcing portion by passing a margin for margin provided on the periphery of the window hole through a leg iron portion. A glue margin is attached with the iron part spread so as to cover it.

Further, on the upper side of the insulating reinforcing portion, the same type as the first covering cover having the same margin portion as the above in the periphery of the window hole penetrating the yoke portion having the expanded joint portion. A pair of second covering covers made of a material are formed in a size that can individually cover the expanded yoke portions, and the second covering covers are individually spread on the respective expanded yoke portions. In this state, the adhesive is adhered to the upper side of the insulating reinforcing portion through the adhesive margin portion of the window hole using the adhesive margin portion.

Next, the side of the yoke having no joint is covered by the first covering cover so as to enclose the box, and the overlapped portion is fixed with an adhesive tape. The second covering cover temporarily covers the expanded yoke portion from the outside of the protective cap and temporarily fixes it using an adhesive tape, a rubber band, or the like. As described above, the wound iron core is connected to the insulation reinforcing portion and the first and second portions.
After completely covered with the covering cover of the above, the U-shaped expanded core is inserted into the core insertion hole of the winding in one operation from the opened yoke portion side, and then the yoke is inserted. The second covering cover temporarily fixed to the part is expanded to its original wide state, and the protective cap is removed, and in this state, the expanded yoke is re-used by using the joint to re-establish the wound core. Perform assembly. After the reassembly of the core, the second core cover wraps the reassembled yoke and completely covers the yoke to manufacture the core transformer.

[0018]

According to the present invention, when a wound iron core is inserted into a winding to manufacture a wound iron core transformer as described above, when the wound iron core is expanded into a U-shape, the leg iron portion and the yoke are used. Since the portion is completely covered in advance by the insulating reinforcing portion and the first and second covering covers, the fragments of the iron core generated at the time of assembling the wound iron core include the first and second covering covers including the insulating reinforcing portion. It is completely enclosed inside and does not leak to the outside, so that pieces of the iron core may enter the conductive parts of the windings during assembly of the wound core, or the pieces may enter the oil during operation of the transformer. The problem that floating and diffusion adversely affect the insulation of the transformer can be reliably solved.

When covering the expanded yoke portion of the wound core with a covering cover or rejoining the yoke portion, the wound core expanded in a U-shape is erected by an erecting device. It is possible to perform the work, and furthermore, by using this erecting device, the wound iron core can be overturned to freely move in the assembling process. Even if the productivity of the wound iron core transformer is combined with the measures against debris, it can be performed efficiently and is convenient.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIGS. 1 to 3, a one-turn cut wound core 1 using an amorphous magnetic alloy ribbon is used.
After the core 1 is formed into a rectangular shape and subjected to magnetic field annealing, a thin leaf insulating member is wound around the leg portions e and e of the core 1 to form the insulating reinforcing portion 8. The process for manufacturing the wound iron core 1 is the same as the conventional process, and the description thereof will be omitted. In addition, in the case where the parts shown in FIGS. 4 to 19 and the parts shown in FIGS. 1 to 3 and 20 are the same, description will be made using the same reference numerals.

The wound iron core transformer 11 shown in this embodiment is similar to that shown in FIG.
As shown by 9, this shows a state manufactured by the manufacturing method of the present invention. The gist of the present invention is that thin insulating paper is wound and adhered to the leg portions e and e of the core 1. with an insulating reinforcement portion 8 and equal, leg of portion e, the pair of yoke portions d located on both sides of e, the d _1, the winding core 1 in a state of being expanded in a U-shape, the first , The second cover 16, 17
In order to make it possible to assemble the wound core 1 into the winding 9 by covering the winding core 1 in advance, and to improve the work efficiency during the assembling, the wound core 1 is used in each assembling process as necessary. By standing up or falling down,
It is possible to easily assemble the wound core transformer 11 without imposing a great deal of labor on an operator, and to manufacture the wound core transformer 11 in which pieces of the iron core do not leak outside. It is in.

Hereinafter, the details of the wound core transformer 11 of the present invention and the manufacturing process of the wound core transformer 11 will be described with reference to FIGS.
It will be explained by. FIG. 4 shows that after forming into a rectangular shape, the side of the yoke portion d having the joint c is opened at the position having the joint c with the wound core 1 lying down, and
From the rectangular state shown in FIG. 3 until the yoke portions d and d reach a position on the same line as the leg iron portions e and e as shown in FIG. 4, that is, the plane shape is U-shaped. Expand so that it becomes. As shown by a two-dot chain line in FIG. 5, for example, a bag-shaped protective cap such as brass and the like which is relatively excellent in flexibility and elasticity is provided on the yoke portions d and d of the wound iron core 1 expanded in a U-shape. Put 12 on.

As described above, when the wound iron core 1 is expanded in a U-shape, the amorphous magnetic alloy ribbon forming the wound iron core 1 forms the outer reinforcing frame a, for example, a silicon steel strip. In comparison, since the plate thickness is about 1/10 or less, it is possible to easily expand the outer reinforcing frame a to the open position without damaging the wound iron core 1 itself. The opening operation of the yoke portion d is performed by the insulation reinforcing portions 8 formed on the leg iron portions e, e of the wound iron core 1.
And the outer reinforcing frame a disposed on the outer peripheral surface of the wound core 1 and the inner reinforcing frame b disposed on the inner peripheral surface of the wound core 1, the rigidity of the wound core 1 is sufficiently maintained. The wound iron core 1 can be smoothly and satisfactorily opened and held in a U-shape without being deformed under its own weight or breaking out of shape upon opening.

The wound iron core 1 expanded in a U-shape is transported on the roller conveyor in a state of being laid down by a roller conveyor or the like (not shown) and is mounted on the upright device 13 in a state of being laid down as shown in FIG. I do. In this case, the yoke portion d ₁ side having no joint portion c of the wound core 1, when the pre is erected the winding core 1, are loosely fitted into置枠body 14 mounting for preventing the fall. Then, an erecting device 13 on which the wound iron core 1 is mounted.
As shown in FIG. 6, a pair of turning frames 14a, 14a in which a plate having an inner surface (a side on which the iron core is mounted) formed in a right angle and an outer surface formed in a semicircular shape are arranged at predetermined intervals are provided. A plurality of roller members 14b rotatably inserted between the turning frames 14a, 14a for moving the wound iron core, and the turning frames 14a, 14
a rotatable receiver 14c rotatably supporting the lower side of the outer surface of
A base 1 for mounting and holding a turntable 15 composed of turn frames 14a, 14a and a roller member 14b via the rotary receivers 14c, 14c so as to be turnable within a range of about 90 °.
4d, a gear member 14e mounted on the side surface of one of the turning frames 14a, and formed with the same radius of curvature as the outer surface of the turning frame 14a and the arc-shaped portion. And a motor 14g for driving this spur gear 14f.
And is constituted by.

After the U-shaped open wound core 1 is mounted on the turntable 15 of the upright device 13, the electric motor 14g is started, and the turntable 15 is placed on the rotary receivers 14c, 14c.
As shown in FIG. 7 on the clockwise side of FIG. 6, the winding core 1 is turned about 90 °, and the winding core 1 is mounted vertically on the turning table 15 via the mounting frame 14, and As shown in (1), the first and second covering covers 16, 17, 17 are respectively attached to the upper and lower portions of the insulating reinforcing portion 8 provided on the leg portions e, e of the wound iron core 1. As shown in FIG. 8, the first cover 16 is provided with window holes 16a, 16a through which the pair of legs e, e pass.
a, respectively, and the window holes 16a, 16a, 16a, 16a have predetermined height dimensions in the upper part of the periphery thereof.
rectangular margin portion 16b surrounding the part a, 16b are provided, moreover, excellent heat and oil resistance with a breadth that can cover sufficiently yoke portion d ₁ does not have the joint portion c In addition, for example, it is formed of an insulating member such as a fiber member or insulating paper.

The second covering covers 17, 17 are divided into two parts so as to cover the pair of expanded yoke parts d, d, respectively, and each of the divided members has a yoke part d. , D penetrate window holes 17a, 17a through which the first covering cover 1 extends.
6, square glue margins 17b, 17b surrounding the window holes 17a, 17a with predetermined height dimensions are integrally provided, and the yoke portions d, d can be individually covered. It has a size and is formed as a pair of the same material as the first cover 16. When the first and second covering covers 16, 17, 17 are mounted, first, as shown in FIG.
a, yoke portion d of the wound core 1 expanded by using 16a,
The adhesive margin portions 16b, 16b are matched with the lower side of the insulation reinforcing portion 8 through the leg iron portions e, e from the side d, and the adhesive margin portions 16
b, 16b are fixed to the insulating reinforcing portions 8, 8 using a bonding means such as an adhesive or an adhesive tape. Note that the covering cover 16 itself does not need to be as shown in FIG.
As shown, the previously spread so as to cover the yoke portion d ₁ does not have a joint c.

Subsequently, the second covering covers 17, 17 are mounted. In this case, since the cover covers 17 are divided, the yoke portions d, d are opened from the upper ends of the expanded yoke portions d, d using the window holes 17a, 17a, respectively, as shown in FIG. The adhesive margin portions 17b, 17b are fitted to the upper portions of the insulating reinforcing portions 8 of the leg iron portions e, e, and the adhesive margin portions 17b, 17b are insulated and reinforced using a bonding means such as an adhesive. Attach to parts 8,8. Then, after the second covering covers 17, 17 are mounted on the yoke portions d, d in a spread state, the expanded portions are protected by the expanded yoke portions d, d as shown in FIG. From the outside of the cap 12, it is folded so as to wrap it, and the folded portion is temporarily fixed with an adhesive tape, a rubber band, or the like. As a result, the leg iron portions e, e of the wound iron core 1 and the expanded yoke portions d, d are formed as shown in FIG.
As shown by 0, it is possible to completely cover with the insulating reinforcing portions 8, 8 and the second covering covers 17, 17.

Next, as shown in FIG.
b, first coating cover 16 is held in a state of 16b was spread on the yoke portion d ₁ and secured to the insulating reinforcing portions 8
In FIG. 11, the expanded portion is once bent downward in parallel with the lamination end surface side of the wound iron core 1 as shown in FIG. As described above, when the first cover 16 is bent downward,
The upright device 13 is driven to rotate the turntable 15 clockwise in FIG. 7 by about 90 °, and the wound iron core 1 is shifted from the upright state to the overturned (lateral) state as shown in FIG. FIG. 7 is a view in which the turning table 15 shown in FIG. 6 is rotated clockwise by about 90 ° and viewed from the right side in FIG. 6). After turning table 15 by inverting the winding core 1, utilizing the standing unit 13, removing the置枠body 14 mounting that was fitted to the yoke portion d ₁ side having no winding core 1 junction c. Thereafter, the first cover 16 bent toward the lamination end face side of the yoke part d ₁ is attached to the yoke part d _1.
12 is wrapped as shown in FIG. 12 so as to be wrapped, and the folded portion is fixed with an adhesive tape or the like so as not to be unraveled, so that there is no joint c of the wound core 1 as shown in FIG. The yoke part d ₁ is completely covered by the first cover 16.

[0029] As described above, leg of portion e of the wound core was expanded into a U-shape, e and yoke portions d, d, to d _1, insulation reinforcing portion 8
After attaching the first and second covering covers 16, 17, 17, the wound iron core 1 is expanded in a U-shape and turned sideways, and the iron core is connected to the iron core from the standing device 13 in a state of being turned over. It is mounted on an insertion plate 19 having a U-shaped plane formed by a metal plate or the like up to the insertion device 18, and is moved and conveyed, for example, on a roller conveyor 18a shown in FIG. The U-shaped wound core 1 is inserted into the insertion plate 19.
For example, in FIG. 6, the erecting device 13 is slightly tilted counterclockwise in FIG. 6, and the height of the erecting device 13 is reduced by the thickness of the insertion plate 19 as compared with the erecting device 13. Roller conveyor 18 connected so as to have
a (conveyor shown in FIG. 13) via the insertion plate 19, or by using the step to slide the wound core 1 from the roller member 14b of the erecting device 13 toward the roller conveyor 18a. Alternatively, it may be mounted on the insertion plate 19. Furthermore, the reason why the insertion plate 19 is used is that the winding core 1 can be inserted into the winding 9 in one operation.

As shown in FIG. 13, the iron core insertion device 18 on which the U-shaped expanded core 1 is mounted includes a roller conveyor 18a and a U-shaped expanded core 1. The insertion plate 19 movably mounted on the roller 18a and the support device 20 for the winding 9 provided in the middle of the roller conveyor 18a are schematically configured. Expanded yoke d, d
Beginning leg of section e, e and leg iron portion e, the other yoke portion d ₁ to e and bridge are formed form the winding core 1 and the same shape to allow nono a.

As shown in FIG. 13, the supporting device 20 for the winding 9 installed in the middle of the roller conveyor 18a has an iron core insertion hole f of the winding 9 and the roller portion of the roller conveyor 18a having the same height. Winding support 21 housed and installed in the middle of the roller conveyor 18a via a height adjusting means (not shown) so as to be at the vertical position, and in the width direction of this support 21 (perpendicular to the length direction of the roller conveyor 18a). ), And a pair of winding support plates 22 movably mounted along the width direction. The winding 9 is preliminarily mounted on the winding support 21 prior to assembling the winding core 1.
Place a pair on top.

That is, a pair of the windings 9 are arranged side by side on the winding support 21 with the core insertion holes f facing the direction of travel of the roller conveyor 18a. The pair of winding support plates 22 are respectively brought into contact with one side portion of the outer peripheral surface of the winding 9, and the winding support plate 22 is fastened to the winding support base 21 using a fastening bolt 22 a or the like. Thereby, the winding 9 is firmly held by the winding supporting plate 22 and fixedly held on the winding supporting base 21.

After the windings 9 are installed on the winding support 21 as described above, the yoke portions d, d which have been expanded by appropriately moving the winding core 1 itself are removed from the cores of the windings 9 corresponding thereto. Positioning is performed so that insertion can be made into the insertion holes f, f. Thereafter, a plate-like protection plate 23 made of, for example, a silicon steel strip is directed to the outside of the pair of yoke portions d, d toward the leg iron portions e, e as shown in FIG. Contact. In this state, the wound iron core 1 expanded in a U-shape via the insertion plate 19 is
The roller 9 is moved to the winding 9 side while sliding on the roller conveyor 18a, and the pair of leg portions e, e of the winding core 1 are inserted together with the insertion plate 19 through the yoke portions d, d into the core insertion hole of the winding 9. f,
f is fitted in almost one operation.

Yoke parts d, d having a joint c of the wound core 1
As shown in FIG. 14, the legs e, e of the winding core 1 are inserted into the core insertion holes f, f of the winding 9 by projecting through the core insertion holes f, f of the winding 9. After the insertion, the insertion plate 1 on which the wound core 1 is mounted is inserted through the core insertion holes f, f.
9 is pulled out in the direction opposite to the insertion direction of the wound core 1. Subsequently, the winding support plate 22 fixing the winding 9 is released, and the winding 9 into which the winding core 1 is inserted is slid on the roller conveyor 18a to be conveyed to the standing device 13 ( The present invention will be described with reference to an example in which the upright device 13 is used to explain the embodiment. However, the present invention is not limited to this, and an upright device installed in the next step may be used. is there).

Since the relationship between the roller conveyor 18a and the upright device 13 has been described in the example in which the small step is provided as described above, the winding 9 into which the wound iron core 1 is inserted is located in front of the upright device 13 at the joining portion. yoke portions d with c, by pressing the d side only under to lift the yoke portion d ₁ side of the opposite side up. As a result, the upright device 13 side of the winding 9 is lifted by the step difference, and the winding core 1 is removed from the roller conveyor 18 in that state.
6A, the roller 9 is pushed on the roller member 14b side of the erecting device 13 and mounted on the turning table 15 of the erecting device 13 (the winding 9 into which the wound core 1 shown in FIG. Instead, they are mounted sideways.)

The windings 9 mounted on the turntable 15 are mounted on the yoke portion d of the wound core 1 having no joint c, and then the mounting frame 14 is fitted thereto. As shown in FIG. 7, the winding core 1 is turned in the upright direction, and as shown in FIG. 14, the winding core 1 which has been positioned in the horizontal direction is turned as shown in FIG. It is vertically set on the table 15 (the wound core 1 inserted into the winding 9 shown in FIG. 15 is mounted vertically instead of the wound core 1 in FIG. 7).

As shown in FIG. 15, the erecting device 13 (FIG. 1)
5 is not shown), a hollow hole 24 is formed in the wound iron core 1 inserted vertically into the winding wire 9 and mounted vertically so that the yoke portions d and d having the joint portion c can sufficiently fit together. Work plate 25,
The yoke portions d, d are loosely fitted and mounted on the axial end surface located above the winding 9. When the work plate 25 is placed on the winding 9, the yoke portions d and d having the joint c of the wound core 1 are formed.
The temporary fixing of the second covering covers 17, 17 temporarily fixed on the side is released, and the second covering covers 17, 17 are spread on the working plate 25 as shown in FIG. Adhere using an adhesive, an adhesive tape or the like. Subsequently, the protective caps 12, 12 covering the yoke portions d, d are removed. As shown in FIG. 4, when the protective caps 12, 12 are removed, the yoke portions d, d are hard to establish as they are because the amorphous magnetic alloy ribbon itself has a weak stiffness even after annealing. Remain, the amorphous magnetic alloy ribbons of the yoke portions d, d tend to fall in directions corresponding to each other.

In this case, for example, as shown in FIG.
Only the free end of the inner reinforcing frame b disposed in the innermost layer of the wound iron core 1 is positioned in the direction of reclosing, and the lower portion of the wedge plates 26, 26 is located between the inner reinforcing frame b and the amorphous magnetic alloy ribbon. And the wedge plates 26, 26 are erected on the upper end surface of the winding 9. In this case, since only the leg portion e of the winding core 1 is inserted into the core insertion hole f of the winding wire 9, the wedge plates 26, 2
6 can be easily pressed into the core insertion hole f and can be established as shown in FIG. As a result, the amorphous magnetic ribbon is supported by the wedge plates 26, 26, and can be easily prevented from tilting in directions opposite to each other. In the above state, the free ends of the inner reinforcing frame b are overlapped and partially fixed by spot welding or the like as shown in FIG.

When the joining of the inner reinforcing frame c is completed, the wedge plates 26, 26 press-fitted into the iron core insertion holes f are extracted, and then, as shown in FIG. 17, the expanded yoke portions d, d
Closed state (inward direction) before reopening sequentially from the inner layer part of
And the joints c are rejoined to each other, thereby completing the reassembly of the open yoke portions d and d of the wound iron core 1.

Subsequently, the free ends of the outer reinforcing frames a are overlapped and joined by welding or the like, and as shown in FIG.
As a style. Next, the second cover 17, which is spread on the end surface on the upper surface side of the winding 9 via the work plate 25,
17 back to the yoke portion d ₁ side first yoke portion d side was rejoined coating cover 16 and similarly wound core 1 to cover the upper surface of該継iron portion d. Then, the second covering covers 17, 17
Is folded so as to wrap it around the entire area of the yoke part d, and the overlapped edge of the folded part is fixed to the outer peripheral surface of the yoke part d with a tape or the like as shown in FIG. The yoke d having the joint c of the iron core 1 is connected to the joint c.
It can likewise be completely covered with the yoke portion d ₁ no. That is, before assembling the wound iron core 1 into the winding 9, the joint c
There the in the first coating cover 16 having no yoke portion d ₁ in advance, after making reassembly incorporating the wound core 1 to the winding 9, further second that was temporarily fixed By covering the yoke part d having the joint part c with the covering cover 17, FIG.
As shown by reference numeral 9, the wound iron core transformer 1 is made of an amorphous magnetic alloy ribbon by wrapping the whole wound iron core 1 with coating covers 16 and 17. When the second covering cover 17 is completely covered, the work plate 25 is connected to the wound core transformer 11.
Remove from

In the wound iron core transformer 11 of the present invention configured as described above, the yoke portions d and d ₁ projecting outward from both end surfaces of the winding 9 in the axial direction are formed on the winding 9 side. Rolled iron core 1
Wide first and second covering covers 1 attached prior to assembling
Since the core 1 is completely covered by the first and second covering covers 1 and 2, fragments of the core generated when the wound core 1 fragile due to annealing is incorporated into the winding 9.
6 and 17 can completely prevent the wound core 1 from being leaked to the outside of the wound core transformer 11 during or after assembly of the wound core 1 without fail. Can be avoided.

[0042]

As described above, in the present invention, an insulation reinforcing portion is formed in advance on a leg portion of a wound iron core formed into a rectangular shape after annealing, and then the wound iron core is formed in a U-shape. First and second covering covers made of an insulating member having a width (area) enough to cover a pair of yoke portions at the upper and lower portions of the iron leg portion are attached to the first and second lower portions, respectively.
The cover cover is directly wrapped in a yoke portion having no joint portion to completely cover the yoke portion, and the second cover cover is temporarily covered with the expanded yoke portion, and the wound iron core expanded in a U-shape is provided. , The insulation reinforcing portion and the first and second covering covers are provided in advance so that they can be incorporated into the winding, so that the winding core can be inserted into the winding or a joint having a joining portion. At the time of re-joining of the iron part, etc., since the wound core itself is completely covered with the insulating member including the first and second covering covers, the pieces of the core leak to the outside during the assembly of the wound core transformer. As a result, it is possible to reliably avoid the problem of invading the conductive portion of the winding or floating in insulating oil during operation of the transformer and deteriorating the insulation of the transformer.

Further, according to the present invention, the first and second covering covers for covering the pair of yoke portions are respectively attached to the yoke portions before the winding cores are assembled into the windings. In doing so, an insulating member made of fiber material or insulating paper,
Each has a window hole through which the iron leg portion of the wound iron core penetrates, and a margin portion surrounding the window hole, and the leg iron portion is penetrated through the window hole to fix the glue margin portion to the insulation reinforcing portion. By this, it is possible to easily attach it to the wound core, and since the covering cover itself has enough space to cover the yoke, it is easy to wrap the yoke after attaching it to the leg iron Therefore, the work of attaching to the winding core can be quickly and easily performed before the winding core is assembled. In particular, the second covering cover for attaching to the expanded yoke is 2
Since it is formed so that it can be divided and attached separately, when reassembling the joint, uncover the temporary covering of the covering cover, spread it on the end face of the winding, and Since rejoining can be performed, when reassembling the yoke, even if fragments of the iron core are generated, the fragments of the iron core are collected on the expanded covering cover without entering the conductive part of the winding. Therefore, reassembly of the yoke can be performed quickly and reliably.

Furthermore, in the present invention, in each of the assembling steps of the wound iron core transformer, such as when attaching the covering cover, when assembling the wound iron core into the winding, and when rejoining the yoke having the joint, etc. The assembling work can be performed by erecting the wound iron core vertically or horizontally by using an erecting device as required, so that the worker performs the assembling work in an optimal posture for each assembling process. As a result, the manufacture of wound iron core transformers does not require special labor,
It can be performed quickly and reliably, and the productivity of this type of transformer can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing a wound core formed into a rectangular shape by performing an annealing process in the present invention.

FIG. 2 is an explanatory view showing a state in which an insulation reinforcing portion is formed on a leg portion of the wound iron core.

FIG. 3 is a plan view of a wound core in which an insulation reinforcing portion is formed on a leg iron portion.

FIG. 4 is a plan view showing a state where a rectangular shaped wound core is expanded in a U-shape.

FIG. 5 is an explanatory diagram showing a state in which a protective cap is covered on an open yoke portion of a wound core.

FIG. 6 is a perspective view schematically showing an erecting device for erecting a wound core.

FIG. 7 is a perspective view showing a state in which the wound core is erected by an erecting device.

FIG. 8 is an exploded perspective view showing a relationship between a wound iron core expanded in a U-shape and first and second covering covers.

FIG. 9 is a perspective view showing a state where the first and second covering covers are attached to a wound core.

FIG. 10 is a perspective view of a wound core showing a state in which the first and second covering covers are being covered with a predetermined yoke portion.

FIG. 11 is a plan view of the same.

FIG. 12 is a perspective view of a wound core covered with first and second covering covers.

FIG. 13 is a perspective view of an iron core insertion device used to insert a wound iron core into a winding.

FIG. 14 is a perspective view showing a state where a winding core is inserted into a winding.

FIG. 15 is a perspective view showing a state where the winding core inserted into the winding is erected by an erecting device in order to reassemble.

FIG. 16 is a perspective view showing a state where reassembly of the expanded yoke portion of the wound core is started.

FIG. 17 is a plan view showing the reassembly of the wound core.

FIG. 18 is a perspective view showing the wound core after reassembly.

FIG. 19 is an explanatory view showing a state in which a wound core transformer is manufactured by covering a yoke having a joint of a wound core with a second covering cover.

FIG. 20 is an explanatory view showing a state in which a wound core is inserted into a winding by a conventional manufacturing method.

FIG. 21 is a perspective view showing a wound core manufactured by a conventional manufacturing method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Winding core 8 Insulation reinforcement part 9 Winding 11 Winding core transformer 13 Standing device 16 1st covering cover 17 2nd covering cover 18 Iron core inserting device d, d ₁ Yoke part e, e Leg iron part f Iron core inserting Hole

Claims (3)

(57) [Claims] 1. A wound core made of an amorphous magnetic alloy ribbon and provided with a joining portion at one of a pair of yoke portions and formed into a rectangular shape, is expanded in a U-shape, and its leg iron portion is formed. In a wound iron core transformer configured by being inserted into a core insertion hole of a winding and rejoining a yoke portion having the joint portion, the leg iron portion of the wound iron core includes:
A wide first and a first insulation reinforced portion is provided which has a window hole through which the iron leg portion penetrates and a margin portion surrounding the periphery of the window hole. The cover cover of No. 2 is disposed with the glue margin portions fastened to the upper and lower portions of the insulating reinforcing portion, respectively, and the yoke portion having no joint is connected to the winding by the first cover cover. The core section is formed by covering the core section before inserting the section, and covering the joining section with the second covering cover after the joining section is rejoined to form a wound core. vessel. 2. The yoke having a pair of window holes penetrating a leg portion of a wound iron core and a margin portion surrounding the periphery of the window holes and having no joint. Formed in a size that can cover the portion, the second covering cover is provided with a window hole that penetrates a yoke portion having a joint portion, and a glue margin portion surrounding the periphery of the window hole, and 2. The wound iron core transformer according to claim 1, wherein the transformer is formed by dividing the yoke into two parts having a size capable of covering the yoke part. 3. A wound iron core made of an amorphous magnetic alloy ribbon, provided with a joining portion at one of a pair of yoke portions and formed into a rectangular shape, is expanded in a U-shape, and its leg iron portion is formed. In the method of manufacturing a wound iron core transformer, which is inserted into the core insertion hole of the winding and rejoins the yoke having the joint to manufacture the wound iron core transformer, A step of forming the insulation reinforcing portion, a step of opening the joint of the yoke portion and opening the wound core having the insulation reinforcing portion formed in a U-shape, and vertically extending the winding core expanded in the U-shape. Erecting the first and second covering covers in a state where the first and second covering covers are spread, using a window hole to fasten the upper and lower portions of the insulation reinforcing portion using a glue margin portion; A step of temporarily covering the expanded yoke portion, and a step of overturning the wound core to cover the first coating cover on the yoke portion having no joint. A step of fitting leg portions of a wound core provided with first and second covering covers on the respective yoke portions into a core insertion hole of a winding, and vertically standing the wound core inserted into the winding. Disassembling a second covering cover that temporarily covers the expanded yoke portion; rejoining the expanded yoke portion; and further joining the second covered cover. And a step of coating the iron part.