JPH07297063A - Manufacture of transformer coil for meter - Google Patents

Abstract

PURPOSE:To provide a manufacturing method of a transformer coil for a meter which can easily manufacture a transformer coil for a meter having multilayered winding. CONSTITUTION:A first and a second insulating tape supplying means 13 and 14 are installed, which supply a first insulating tape 30A and a second insulating tape 30B to a winding frame 301 in the left side region and the right side region of a wire supplying means 12, respectively. Layer insulating layers 3A1, 3A2 are formed by winding the first insulating tape 30A and the second insulating tape 30B around the winding frame 301 while reciprocating the tapes along a main axis 10, on the left side and the right side of a wire 4, respectively. A layer winding C1 is formed by winding the wire 4 on the layer insulating layer 3A1 which has been already formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an instrument transformer coil suitable for use as a primary coil of an instrument transformer.

[0002]

2. Description of the Related Art A transformer for an instrument, as shown in FIG.
It is composed of an iron core 1, a secondary coil (low voltage coil) 2 wound around the iron core, and a primary coil (high voltage coil) 3 wound outside the secondary coil 2.

As shown in FIG. 9, the primary coil 3 includes a winding frame 301 formed of an insulating material in a cylindrical shape, and layer insulating layers 3A1 'to 3An' positioned inside to form a winding frame 3
A large number of layer windings C1 and C wound around the outer circumference of 01
.. Cn and the outermost insulating layer 3B 'provided on the outer circumference of the outermost winding Cn. Insulation layer 3A1 '
~ 3An 'and 3B' are formed by winding an insulating sheet having a width dimension larger than the winding width of the layer windings adjacent to each other until a predetermined thickness is obtained,
Each layer winding is wound such that both ends in the axial direction are located inside both ends of the insulating layers arranged inside and outside. In the illustrated example, the layer windings C1 to Cn are arranged so that the longitudinal section of the primary coil 3 has a substantially trapezoidal shape.
It is wound such that the winding width dimension (axial direction dimension) becomes smaller as it is located on the outer side in the radial direction.

In the conventional transformer coil for an instrument, since each insulating layer is formed by winding a plurality of turns of an insulating sheet having a width larger than the winding width of the layer winding, the insulating sheet is wound a predetermined number of turns. Since it is necessary to turn the coil after turning it and to stop the winding machine when cutting the insulating sheet, it is unavoidable that the winding work is troublesome and the cost is high.

In particular, as shown in FIG. 9, the winding width of the layer winding located on the outer side in the radial direction is made smaller than the winding width of the layer winding located on the inner side, so that the cross section of the coil is a base. In the case of configuring to have a shape, an insulating sheet having various width dimensions is prepared in advance, and the insulating sheet is replaced or the layer winding of the layer winding is changed every time the winding width of the layer winding changes. Since it is necessary to cut an extra portion of the insulating sheet each time the winding width changes, winding work becomes very troublesome and workability cannot be avoided.

Further, the required thickness of the layer insulating layer of the transformer coil for an instrument is determined by the layer voltage borne by the layer insulating layer, and is required for the insulating layer at one end and the other end in the width direction of the insulating layer. Although each layer has a different thickness, each layer is conventionally formed by winding an insulating sheet having a width dimension larger than the winding width of the layer winding. There is no choice but to make it uniform along the direction of the axis, and the thickness of the layer insulating layer has to be increased even in a place where the thickness may be small, which causes a problem that the coil becomes large.

Therefore, the present inventor has previously proposed Japanese Patent Application No. 4-26.
No. 6343 proposes an instrument transformer coil in which each layer insulating layer is formed by partially wrapping an insulating tape narrower than the winding width of the layer winding and winding the layer in a spiral shape. did.

[0008]

PRIOR ART OF THE PRESENT INVENTION Since the present invention is intended to improve a part of the invention disclosed in the application previously filed by the present inventor, in order to facilitate understanding of the present invention, First, the already proposed invention will be described.

FIG. 4 shows an example of the configuration of an instrument transformer coil according to the already proposed invention. In FIG.
Is a cylindrical winding frame, C1 to Cn are n layers of layer windings concentrically wound on the winding frame 301, with the layer insulating layers 3A1 to 3An located inside thereof. Three
B is an outermost peripheral insulating layer. In the previously proposed invention, as shown in FIG. 6, an insulating tape 30 having a width dimension sufficiently smaller than the winding width of the layer winding is used in 90% in the width direction.
The layer insulating layers 3A1 to 3An and the outermost peripheral insulating layer 3B are formed by spirally winding them while wrapping them by about 20%. When gas is used as the insulating medium of the instrument transformer, polyester resin tape is used as the insulating tape.

When each layer insulating layer is formed by winding the insulating tape in this manner, it is not necessary to handle an insulating sheet having a wide width, so that the winding work can be efficiently performed. Generally, in a winding machine, with a traverse mechanism that supplies an insulation-coated electric wire to the winding frame side while moving (traversing) in a direction parallel to the main axis of the winding machine (the axis that holds and rotates the winding frame 301). Although the electric wire supplying means is provided, the insulating tape supplying means having the same traverse mechanism can be added to this winding machine to easily wind the insulating tape.

Since the winding of the insulating tape can be performed in the same manner as the winding of the electric wire, the winding of the insulating tape and the winding step of the winding are performed in parallel to manufacture the coil. The efficiency can be increased.

The insulating tape constituting each layer insulating layer is
It is preferable that the thickness of each layer insulating layer is wound so as to gradually increase from the axial end on the low layer voltage side to the axial end on the high layer voltage side.

Here, the layer voltage means the voltage that the layer insulating layer bears. The layer voltage of the innermost layer insulation layer corresponds to the potential of each part of the innermost layer winding, and gradually increases from the winding start end to the winding end end of the innermost layer winding. Getting higher.

Further, the layer voltage of the layer insulating layer interposed between the layers of the layer winding is equal to the potential difference between the layer windings adjacent to the inside and the outside thereof, and the layer voltage from one end of the adjacent layer winding on the side of the common connection point. It gradually increases toward the other end.

In the example shown in FIG. 4, the layer winding C1 is wound from the left end to the right side of the drawing and folded back at the right end of the figure, and then the layer winding C2 is wound from the right side to the left side and folded back at the left end. The layer windings C3, C4, ... Cn are successively wound in the same manner. In this case, considering the potential difference between the respective portions of the two adjacent layer windings, the common connection point (folding portion) between the winding end end of the inner layer winding and the winding start end of the outer layer winding is adjacent. The potential difference between the windings is small, and the potential difference between the adjacent windings is high at the opposite end. For example, in FIG. 4, the layer winding C1
, The potential difference between both windings is high at the left end of C2,
At the right ends of the layer windings C1 and C2, the potential difference between both windings is low. Therefore, in FIG. 4, the thickness of the layer insulating layer 3A2 may be thin at the right end but needs to be thick at the left end. Therefore, in the example of FIG.
An insulating tape is wound so that the thickness of the layer insulating layer 3A2 gradually increases from the right side to the left side. The same applies to other layer insulating layers.

Further, each part of the innermost layer insulating layer 3A1 must withstand the potential of each part of the innermost layer winding C1. Therefore, the innermost layer of the insulating layer 3A1 is gradually thinned from the left end to the right end so that the winding start side of the layer winding C1 is thinned and the winding end side of the layer winding C1 is thickened. It is changing.

The outermost insulating layer 3B is formed by winding an insulating tape around the outermost layer winding Cn of the outermost layer. The insulating layer 3B is formed substantially along the winding axis of the winding. It is formed to have a uniform thickness.

FIG. 5 shows, as an example of a method of forming an insulating layer, a method of winding an insulating tape when forming the innermost layer insulating layer 3A1 whose thickness gradually increases from the left end to the right end. ing. In this example, the insulating tape is partially wrapped and wound from the left end a1 to the right end a2 to form an insulating layer 3a1 having a winding width Lo and then folded back to wind the insulating tape from the right end a2 to the left end a3. An insulating layer 3a2 having a turn width L1 (<Lo) is formed. When the insulating layer 3a2 is formed, fold it back again and attach the insulating tape to the left side a3.
The insulating layer 3a3 having a winding width L1 is formed by winding the insulating layer 3a3 to the right from. Hereinafter, the winding width is shortened each time it is folded back at the right end, and the insulating layers 3a4, 3a5, ... With winding widths L2, L3 ,.
3a9 is sequentially wound to form a layer insulating layer 3A1 whose thickness gradually increases from the left side to the right side. Other layer insulating layers can be formed by the same method.

As described above, when each insulating layer is formed by winding the insulating tape, the layer winding C is formed.
By setting the number of turns of 1 to Cn and the number of turns of the insulating tape forming the layer insulating layer to be equal to each other and making the traverse speed of the insulating tape faster than the traverse speed of the electric wire, each winding and the insulating layer inside thereof are wound. And can be wound in parallel with the same rotation of the main shaft of the winding machine.

For example, when winding the winding C1 of the first layer, the traverse speed of the insulating tape is set to be higher than the traverse speed of the electric wire, and the same rotation of the main shaft of the winding machine is shown in FIG. While the insulating layer 3A1 is wound in a pattern, the insulating covered electric wire is wound on the insulating layer 3A1 to form the layer insulating layer 3
A1 and winding C1 can be wound in parallel. In this case, the traverse speed of the electric wire and the insulating tape and the width dimension of the insulating tape are appropriately set so that the winding of the insulating layer 3A1 and the winding of the winding C1 are started and stopped at the same time. deep. Similarly, other layer windings and the inner layer insulating layer can be wound in parallel, and the winding width can be adjusted by adjusting the number of windings of the insulated wire and insulating tape. Therefore, as shown in FIG. 4, an instrument transformer coil having a trapezoidal cross section,
It is possible to wind continuously without stopping the winding machine.

Here, the layer winding C1 and the layer insulating layer 3
Taking the process of winding A1 as an example, when the layer winding and the layer insulating layer are wound in parallel, the feed pitch of the electric wire, the feed pitch of the insulating tape and the insulation between the layer insulating layer are wound. The relationship between the distance traveled by the tape and the distance traveled will be described.

The locus of movement of the insulating tape when the layer winding C1 and the layer insulating layer 3A1 are wound in parallel are a1 → a2 → a3 → ... a9 → a10 in FIG.
During this time, the wire moves from a1 to a2. Where a1
The distance between a2 and a2, the distance between a3 and a4, the distance between a5 and a6, the distance between a7 and a8 and the distance between a9 and a10 are Lo, L1, L2, L3 and L4, respectively, and the wire feed pitch is When the (winding pitch) is d, the number of turns No of the winding C1 is given by the following equation.

No = Lo / d [turn] (1) On the other hand, the distance the insulating tape moves while winding the winding C1 is L
Then, L = Lo + (L1 + L2 + L3 + L4) × 2 (2) In order to wind the coil C1 and the insulating layer 3A1 in parallel, the number of turns of the coil C1 and the insulation of the insulating layer 3A1 are set. The number of windings of the tape must be equal. Coil C1
Assuming that the feeding pitch of the insulating tape required to equalize the number of windings of the insulating tape and the number of windings of the insulating tape is Pt, Pt = L / No Therefore, if the total moving distance L of the insulating tape when forming the layer insulating layer is determined, the feed pitch of the insulating tape can be easily determined.

If the feed pitch Pt of the insulating tape is constant, the moving distance L of the insulating tape is increased or decreased to match the winding end position of the insulating tape with the winding end position, or the insulating tape is wound. The winding end position and the winding end position of the winding can be appropriately different from each other to freely form a portion where the electric wire is not wound at both ends of the layer insulating layer as shown in FIG. .

In the above description, the feeding pitch d of the electric wire and the moving distance L of the insulating tape are determined first, but the moving distance L and the feeding pitch Pt of the insulating tape are decided first, and the feeding pitch of the electric wire is changed later. You can also decide.

When the layer winding and the layer insulating layer are wound in parallel without stopping the winding machine in the middle,
Since it is necessary to make the traverse speed of the insulating tape faster than the traverse speed of the wire, there is a process in which the insulating tape folds at the end and moves in the direction opposite to the wire before the wire reaches the end position of each layer winding. Must exist. If the insulating tape passes the electric wire in this process, it is necessary to cross the electric tape and the insulating tape at the passing position.

When the electric wire reaches the winding end position of the layer winding of one layer, the insulating tape and the electric wire are wound together to move the electric wire to the winding start position of the winding of the next layer. Move. FIG. 7 shows an example of a state in which the electric wire is moved from the winding end position of the layer winding to the winding start position of the next layer winding. In FIG. 7, 4 is an insulation-coated electric wire which constitutes the layer winding C1. Is. 4a is the end of the layer winding, 4b
Indicates the winding start of the next layer winding C2, and the winding end 4a of the winding C1 and the winding start 4b of the winding C2 have the same potential. Further, 5a is the winding end of the layer insulating layer 3A1 and 5b is the winding start of the layer insulating layer 3A2. When the wire reaches the winding end position of the layer winding C1, the wire and the insulating tape are wound together. Thus, the electric wire is moved to the winding start position of the next layer winding C2. After the electric wire is moved to the winding start position of the layer winding C2, the feeding directions of the electric wire and the insulating tape are reversed to wind the layer winding C2 and the insulating layer 3A2. In this way, a series of layer windings and a layer insulating layer can be continuously wound.

As described above, when each layer insulating layer is formed by winding the insulating tape having a narrow width, the following advantages can be obtained.

(A) Since it is not necessary to handle a wide insulating sheet and the layer insulating layer can be formed at the same time as the winding of the layer winding, the manufacturing efficiency of the instrument transformer coil can be greatly improved. .

(B) When the layer insulating layer is formed by winding the insulating tape, the winding of the insulating tape and the winding of the electric wire are performed in parallel, so that the winding machine is not stopped. Can be completed.

(C) Since the width dimension of each insulating layer can be adjusted by the number of windings of the insulating tape, layer windings having various winding widths can be efficiently wound, and the layer positioned on the outer side in the radial direction can be efficiently wound. A winding coil can be easily obtained by making the winding width of the winding smaller than the winding width of the layer winding located inside. In this case, it is not necessary to cut the excess part of the insulation sheet or to prepare various types of insulation sheets with different widths and replace the insulation sheet during the winding of the coil, so the winding work efficiency is improved. Can be greatly improved over the conventional one.

(D) Since the thickness dimension of each portion of the layer insulating layer can be arbitrarily adjusted by making the number of windings of the insulating tape different at each portion in the width direction of each layer insulating layer, the thickness dimension of each portion of the layer insulating layer can be adjusted. The size of the coil can be reduced to the required minimum size, and the insulating material can be saved.

[0033]

When winding the transformer coil for an instrument of the already proposed invention, the insulating tape for layer insulation and the electric wire are simultaneously wound on the same winding frame, and the insulating tape is more effective than the electric wire. Also, since the coil is wound over a width wider than the winding width of the coil in advance, when only one means for supplying the insulating tape is provided to wind the layer insulating layer, each layer is wound. Every time the winding is wound, there always occurs a point where the electric wire and the insulating tape intersect. When the electric wire and the insulating tape intersect, the feeding directions of the electric wire and the insulating tape are different, and the two interfere with each other, and the axial force is applied to the electric wire from the insulating tape. Since a directional force is applied, it is difficult to accurately control the feed of both when the winding speed is high.

Therefore, one means for supplying the insulating tape is used.
If only one cable is provided, it is necessary to reduce the rotation speed of the bobbin extremely to a speed close to a stopped state when the electric wire and the insulating tape cross each other to soften the interference between the insulating tape and the electric wire. There was a problem that it took time to make.

The object of the present invention is to efficiently wind the respective layer windings and the layer of the insulating layer in parallel without reducing the rotation speed of the bobbin extremely, thereby efficiently transforming the instrument. An object of the present invention is to provide a method for manufacturing a transformer coil for a meter, which is capable of manufacturing a transformer coil.

[0036]

SUMMARY OF THE INVENTION The present invention is an instrument transformer coil for winding an instrument transformer coil having a layer insulation layer disposed inside each of a plurality of concentrically arranged layer windings. The present invention relates to a manufacturing method of.

In the present invention, the main shaft is driven to rotate while holding the cylindrical winding frame, and the electric wire supplying means for supplying the insulation-coated electric wire to the winding frame side while reciprocating along the axial direction of the main shaft. When the electric wire supply means is viewed from the spindle side, the first insulating tape and the second insulating tape are respectively moved while reciprocating along the axial direction of the spindle in the regions located on the left side and the right side of the electric wire supply means, respectively. First supply to the reel side
And second insulating tape supply means are provided, and the first and second insulating tapes are wound around the winding frame in the left side region and the right side region of the electric wire extending from the electric wire supply means to the winding frame side, respectively. A process of forming a layer insulating layer by rotating,
The process of forming the layer winding by winding the insulating coated electric wire on the already formed layer insulating layer is performed in parallel.

In the process of forming the layer insulating layer, one of the first and second insulating tapes is wound around the bobbin to precede the winding of the layer winding. The process of forming the layer insulation layer to be placed inside the layer winding being wound and the next winding by winding the other insulating tape around the circumference of the layer winding being wound. Preferably, the process of forming the layer insulating layer to be arranged inside the layer winding is performed in parallel.

In the process of forming each layer insulating layer,
By winding the first insulating tape at a position adjacent to the left axial end of each layer winding until a predetermined thickness is obtained, the winding collapse for pressing the left axial end of each layer winding. The process of forming the weir for prevention and winding the second insulating tape at a position adjacent to the axial end portion on the right side of each layer winding until each layer winding has a predetermined thickness. It is preferable to perform it together with the process of forming the roll collapse preventing weir that presses the right end portion in the axial direction.

The above-mentioned electric wire supply means is the same as that provided in the winding machine which has been widely used from the past.
For example, an electric wire supply reel supported by a movable frame provided so as to reciprocate in the axial direction of the winding frame and an electric wire supported by the movable frame together with the reel and fed from the reel are guided to the winding frame side. And a drive mechanism that drives the movable frame so as to reciprocate in the axial direction of the winding frame.

Each insulating tape supply means is similar to the electric wire supply means, and for example, an insulating tape supply reel supported by a movable frame provided so as to reciprocate in the axial direction of the winding frame, A guide means for guiding the insulating tape, which is supported by the movable frame together with the reel and fed from the reel, to the winding frame side, and a drive mechanism for driving the movable frame so as to reciprocate in the axial direction of the winding frame.

[0042]

As described above, the first and second insulating tape supplying means for supplying the first and second insulating tapes to the winding frame side are provided in the area on the left side and the area on the right side of the electric wire supplying means, respectively. When the layer insulating layer is formed by winding the first insulating tape and the second insulating tape around the winding frame on the left side and the right side of the electric wire supply means, respectively, the electric wire and the insulating tape do not cross each other. The insulating layer and each of the layer winding layers can be wound. Therefore, an axial force is not applied to the electric wire from the insulating tape in the middle of the winding, and an axial force is not applied to the insulating tape from the electric wire, so that the movement of the electric wire and the insulating tape can be easily controlled. Therefore, it is not necessary to extremely reduce the rotation speed of the winding frame during winding, and the winding work can be performed efficiently.

[0043]

1 shows an example of an instrument transformer coil wound by the method of the present invention, and this coil is used as a primary coil of an instrument transformer. Figure 1
In the figure, 301 is a cylindrical bobbin, and the bobbin 30
A lower electrode 302 is wound around the outer periphery of 1 so as not to form one turn. Reference numeral 3 denotes a primary coil of an instrument transformer wound on the lower electrode 301. This coil is composed of layer insulating layers 3A1 to 3An and n layers respectively wound on these layer insulating layers. Layer winding C1 ~
It consists of Cn. Outermost layer winding C of coil 3
The outermost peripheral insulating layer 3B is formed on the outer periphery of n, and the upper electrode 303 is wound around the outer periphery of the outermost peripheral insulating layer 3B so as not to form one turn. Further, in this example, the insulating tape is wound at a position adjacent to both ends in the axial direction of each layer insulating layer until a predetermined thickness is obtained, and weirs 3Do to 3Dn for preventing coil collapse are formed. Has been done.

The terminal portion on the winding start side of the innermost layer winding C1 is electrically connected to the lower electrode 302, and the lower electrode 30
A terminal connected to the winding start of the coil 3 is drawn out through 2. Further, the terminal portion on the winding end side of the outermost layer winding Cn is electrically connected to the upper electrode 303, and the terminal connected to the terminal portion on the winding end side of the coil 3 is drawn out through the upper electrode 303. . The upper electrode 303 is 1
Secondary coil (high-voltage coil) arranged outside the secondary coil
Also serves as an attachment part of the electrode that shields.

FIG. 3 schematically shows the structure of a winding machine used for carrying out the present invention. In FIG. 3, 10 is the main shaft of the winding machine, and 11 is a reel holder attached to the main shaft 10. A reel 301 made of an insulating material is positioned and held concentrically with the main shaft 10 by the reel holder 11. A lower electrode 302 is wound around the outer circumference of the winding frame 301 so as not to form one turn.

On the side of the main shaft 10, the electric wire supplying means 12 for supplying the insulating coated electric wire 4 to the winding frame side while reciprocating along the axial direction of the main shaft 10 and the electric wire supplying means 12 from the main shaft 10 side are seen. In this case, the first insulating tape 30A and the second insulating tape 30A are provided on the winding frame side while reciprocating along the axial direction of the main shaft 10 in the regions respectively located on the left side and the right side of the electric wire supply means.
The first and second insulating tape supplying means 13 and 14 for respectively supplying the insulating tape 30B are arranged.

The electric wire supply means 12 is provided on the movable frame 12a, which is arranged parallel to the main shaft 10 and is guided by a means (not shown) so as to be capable of reciprocating linear movement in a direction parallel to the main shaft 10. A guide means for holding the screw rod 12b screwed into the female screw, a reel 12c for supplying an electric wire supported by the movable frame 12a, and the insulated covered electric wire 4 fed from the reel 12c and guiding the wire to the reel 301 side. It consists of 12d. Although not shown, a drive mechanism for rotating the screw rod 12b is provided, the screw rod 12b is rotationally driven by the drive mechanism, and the movable frame 12a is reciprocally driven in a direction parallel to the main shaft 10. There is. In this example, the movable frame, the screw rod, and the drive mechanism (not shown) constitute a traverse mechanism of the electric wire supply means.

The first insulating tape supply means 13 comprises the spindle 1
A movable frame 13a supported so as to be capable of reciprocating linear movement in a direction parallel to 0, a threaded rod 13b arranged parallel to the main shaft 10 and screwed into a female screw provided on the movable frame 13a, and the movable frame. A first insulating tape supply reel 13c supported by 13a and a first insulating tape 30 fed from the first insulating tape supply reel 13c.
The guide means 13d guides A to the winding frame 302 side.

Similarly, the second insulating tape supplying means 14
Is a movable frame 14a supported so as to be capable of reciprocating linear movement in a direction parallel to the main shaft 10, and a screw rod 14b arranged parallel to the main shaft 10 and screwed into a female screw provided on the movable frame 14a. , A guide means 14 for guiding the first insulating tape supplying reel 14c supported by the movable frame 14a and the second insulating tape 30B fed from the first insulating tape supplying reel 14c to the winding frame 302 side.
and d.

Although not shown, the screw rods 13b and 14b
A drive mechanism for rotating each of the
By rotating 3b and 14b, the movable frames 13a and 14a are reciprocally driven in the axial direction of the main shaft 10.

In this example, the traverse mechanism of the second insulating tape supplying means is constituted by the movable frame 13a, the screw rod 13b, and the drive mechanism (not shown).
The traverse mechanism of the second insulating tape supply means is constituted by 4a, the screw rod 14b, and the drive mechanism (not shown).

In the winding machine of FIG. 3, the electric wire supply means 1
2, the first insulating tape supplying means 13 and the third insulating tape supplying means 14 independently of each other without interfering with each other.
The screw rods 12b, 13b, and 14b are arranged so that their respective positions are offset so that the screw rods 12b, 13b, and 14b can reciprocate between one end and the other end of 01.

The first insulating tape 30A and the second insulating tape 30B have the same thickness dimension, width dimension, and material, and the width dimension of these tapes is sufficiently larger than the winding width dimension of the layer winding. It is set to be small and larger than the diameter of the wire.

In the method of the present invention, the first and second insulating tape supplying means 13 and 14 are reciprocally moved along the axial direction of the main shaft 10 in the areas on the left side and the right side of the electric wire supplying means, respectively. The first insulating tape 30A and the second insulating tape 3 are respectively provided on the left side region and the right side region of the electric wire 4 extending from the electric wire supply means 12 to the winding frame side.
By supplying 0B to the reel side, it is possible to
And a process of winding the second insulating tapes 30A and 30B to form the layer insulating layers 3A1 to 3An, and rotating the insulation-coated electric wire 4 while reciprocating the electric wire supply means 12 along the axial direction of the main shaft 10. Is supplied to the winding frame 301 side, and the process of forming the layer windings C1 to Cn by winding the insulating covered electric wire 4 on the already formed layer insulating layer is performed in parallel. .

In the process of forming the layer insulating layer, one of the first and second insulating tapes 30A and 30B is wound around the winding frame 301 so that the layer winding is wound more than the winding of the layer winding. Previously, the process of forming a layer insulation layer to be arranged inside the layer winding being wound, and by winding the other insulating tape around the outer periphery of the layer winding being wound, In parallel with the process of forming the layer insulating layer.

Now, in FIG. 2, it is assumed that the reel 301 is rotated in the direction of the arrow H, and in FIGS.
The winding of the layer winding C1 of the first layer is started from the left end side of 01. In this case, first, the first insulating tape supplying means 13, the electric wire supplying means 12, and the second insulating tape supplying means 14 are moved to the left side, and the winding frame 301 is stopped. The starting end portion of the first insulating tape 30A and the starting end portion of the second insulating tape 30B are arranged side by side and fixed, and the starting end portion of the insulation-coated electric wire 4 is fixed on the starting end portion of the second insulating tape. . In this state, the winding frame 301 is rotated and the electric wire supply means 1
2 and the second insulating tape supplying means 14 are traversed to the right along the axial direction of the main shaft 10, and the second insulating tape 30B is partially wound so as to be spirally wound to form the layer insulating layer 3A1. At the same time, the electric wire 4 is wound on the already formed layer insulating layer 3A1 to form the layer winding C1. In this case, the traverse speed of the second insulating tape supplying means 14 is made higher than the traverse speed of the electric wire supplying means 12 to advance the formation of the layer insulating layer 3A1, and the second insulating tape 30B causes the lower electrode 302 to move.
When the insulating tape 30B is wound up from the right side to the left side by reversing the traverse direction of the insulating tape supplying means 14 when the insulating tape 30B approaches the electric wire 4 traversing to the right side. Then, the traversing direction of the insulating tape supplying means 14 is reversed again and the insulating tape 30B is traversed to the right side. In this manner, the second insulating tape supplying means 14 is reciprocally moved along the axial direction of the main shaft 10 to form the layer insulating layer 3A1 whose thickness gradually increases from the left side to the right side. In parallel with the formation of the layer insulation layer C1, the layer winding C1 is wound on the already formed layer insulation layer 3A1. When the formation of the layer insulating layer 3A1 is completed, the second insulating tape 30B is stopped near the right end of the lower electrode and the insulating tape 30B is wound at the same position to prevent the winding of the layer winding C1 from collapsing. To form a weir 3D1.

On the other hand, the first insulating tape supplying means 13 is first stopped near the left end of the winding frame 301, and the lower electrode 3
The left end of the layer winding C1 is wound by winding the first insulating tape 30A at the same position near the left end of 02 (the position where the starting end of the first insulating tape 30A is fixed) until a predetermined thickness is obtained. A weir 3Do is formed to prevent the roll from collapsing. When the formation of the weir 3Do is completed, the traverse of the first insulating tape supplying means 13 to the right side is started. After that, by causing the first insulating tape supply means 13 to follow the electric wire supply means 12 and traverse to the right side,
A layer insulating layer to be placed inside the layer winding C2 to be wound next by winding the first insulating tape 30A around the already wound portion of the layer winding C1 being wound. Form the bottom layer of 3A2. Layer winding C1
The first insulating tape 30A is arranged so as to reach the right end of the layer winding C1 at the end of the winding, and when the winding of the layer winding C1 is completed, the first insulating tape is supplied. The traverse direction of the means 13 and the electric wire supply means 12 is reversed. After reversing the traverse direction, the traverse speed of the first insulating tape supplying means 13 is made higher than the traverse speed of the electric wire supplying means 12, and the insulating tape supplying means 13 reciprocates to move from the right end to the left end. To form a layer insulation layer 3A2 having a gradually increasing thickness, and the electric wire 4 is formed on the already formed portion of the layer insulation layer 3A2.
Is wound to form a layer winding C2. Also weir 3D
After the formation of 1 is completed, the second insulating tape supply means 14 stopped at the right end side of the winding frame 301 is traversed to the left side, and the second insulating tape 30B is wound around the layer winding C2. By winding around the already wound portion, the layer insulating layer 3A3 to be arranged inside the layer winding C3 to be wound next is formed.

By repeating the same operation thereafter, the layer insulating layers 3A3 to 3An and the layer windings C3 to Cn are formed in parallel, and when the last layer winding Cn is wound, the second insulating layer 3A3 to 3An is formed. By winding the tape 30B back and forth around the outer circumference of the layer winding Cn, the outermost insulating layer 3B having a thickness gradually increasing from the left end to the right end is formed, and the winding of the coil 3 is completed. When the winding of the coil 3 is completed, the main shaft 10, the electric wire supplying means 12, and the first and second insulating tape supplying means 13 and 14 are stopped. Thereafter, the upper electrode 303 is wound around the outermost insulating layer 3B, and the winding end end of the layer winding Cn is connected to the upper electrode 303 to complete the coil.

In the present invention, the insulating tapes 30A, 30
B material and width dimension, range of wrapping cost of insulating tape,
And between the feed pitch of the electric wire, the feed pitch of the insulating tape, and the distance that the insulating tape moves while winding the layer insulating layer when the layer winding and the layer insulating layer are wound in parallel. The relationship is almost the same as that in the already proposed invention described above.

As described above, in the method of the present invention, the first and second insulating tape supplying means are provided on the left side and the right side of the electric wire supplying means, and the first and second insulating tapes are respectively supplied to the electric wire supplying means. Since the layer winding is wound while forming the layer insulating layer while moving only on the left side and the right side of the wire, the winding work can be performed without crossing the insulating tape and the electric wire during the winding of each layer winding. be able to. Therefore, it is not necessary to extremely reduce the rotation speed of the spindle during the winding work, and the efficiency of the winding work can be improved.

In the above embodiment, the weir 3D for preventing the collapse of the winding
o ~ 3Dn was performed in parallel with the formation of the layer insulating layer, but if the weir cannot be formed in parallel with the layer insulating layer due to the thickness of the weir, in the middle of the winding. Then, the main shaft may be stopped once, and the insulating tape for forming the weir may be separately wound.

In the above embodiment, the lower electrode 302 is arranged on the outer circumference of the winding frame 301 and the coil is wound on the lower electrode. However, the coil is wound directly on the winding frame. Of course, the method of the present invention can be applied to the case.

[0063]

As described above, according to the present invention, the first and second insulating tapes are respectively supplied to the winding frame side in the left side region and the right side region of the electric wire supply means. Since the insulating tape supplying means is provided and the first insulating tape and the second insulating tape are wound around the winding frame on the left side and the right side of the electric wire supplying means, respectively, the layer insulating layer is formed. The layer insulating layer and each layer of the layer winding can be wound without crossing the insulating tape. Therefore, it is not necessary to extremely reduce the rotation speed of the winding frame during winding, and the winding work can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a half sectional view showing an example of an instrument transformer coil manufactured by the method of the present invention.

FIG. 2 is a perspective view of a main part showing a winding structure of the coil of FIG.

FIG. 3 is a configuration diagram showing a configuration example of a winding machine used to carry out the method of the present invention.

FIG. 4 is a half sectional view showing an example of an instrument transformer coil wound according to the proposed invention.

FIG. 5 is an explanatory diagram illustrating a method of forming a layer insulating layer in the case of the already proposed invention.

FIG. 6 is a perspective view of an essential part showing a winding structure in the case of a proposed invention.

FIG. 7 is an explanatory diagram for explaining a method of transferring the electric wire of the final turn of the layer winding of each layer in the coil according to the already proposed invention to the first turn of the coil of the next layer.

FIG. 8 is a cross-sectional view showing an example of a transformer.

FIG. 9 is a cross-sectional view of a half portion of an instrument transformer coil manufactured by a conventional method.

[Explanation of symbols]

 3 Transformer primary coil for instrument 301 Winding frame 3A1 to 3An Layer insulating layer C1 to Cn Layer winding 4 Insulated electric wire 12 Electric wire supplying means 13 First insulating tape supplying means 14 Second insulating tape supplying means 30A 1st Insulation tape 30B second insulation tape

Claims (3)

[Claims] 1. A method for manufacturing a transformer coil for an instrument, comprising winding a transformer coil for an instrument, in which a layer insulation layer is disposed inside each of a plurality of layer windings arranged concentrically, the method comprising: The main shaft driven to rotate while holding the winding frame, the electric wire supply means for supplying the insulation-coated electric wire to the winding frame side while reciprocating along the axial direction of the main shaft, and the electric wire supply means from the main shaft side In this case, the first insulating tape and the second insulating tape are supplied to the winding frame side while reciprocating along the axial direction of the main shaft in the regions located on the left side and the right side of the electric wire supply means, respectively. 2 insulating tape supply means is provided, and the first and second insulating tapes are wound around the winding frame in the left and right regions of the insulation-coated electric wire extending from the electric wire supply means to the winding frame side, respectively. Leya by turning An instrument characterized in that the step of forming an insulating layer and the step of forming a layer winding by winding the insulating covered electric wire on the already formed layer insulating layer are performed in parallel. Manufacturing method of transformer coil. 2. In the process of forming the layer insulating layer,
By winding one of the first and second insulating tapes around the winding frame, the insulating tape is arranged inside the layer winding being wound prior to the winding of the layer winding. The step of forming the desired layer insulation layer and the step of forming the next layer insulation layer by winding the other insulation tape around the outer circumference of the layer winding being wound are performed in parallel. The manufacturing method of the transformer coil for instrument according to claim 1. 3. In the process of forming each layer insulation layer, a first layer is formed at a position adjacent to the left axial end of each layer winding.
The process of forming a weir for preventing winding collapse that presses the left end of each layer winding in the axial direction by winding the insulating tape of the above until a predetermined thickness is obtained, and the axis of the right layer of each layer winding. Forming a roll collapse prevention weir that presses the right axial end of each layer winding by winding the second insulating tape at a position adjacent to the end in the axial direction until a predetermined thickness is obtained; The method for manufacturing an instrument transformer coil according to claim 1 or 2, further comprising: