JPH0521022Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application of the Invention) The present invention relates to an improvement of a winding frame of a voltage coil used in a power meter.

(Background of the invention) FIG. 4 is a perspective view showing an example of a voltage element including this kind of voltage coil. The voltage element 1 includes a voltage core 3 in which a predetermined number of core sheets 2 are laminated,
It mainly consists of a voltage coil 4 and a winding frame 5 of the voltage coil 4. And, the core sheet 2 is
After being inserted into the winding frame 5, the rivets 6, 7, 8
and 9 to form a voltage core 3. 10 and 11 are connection wires of the voltage coil 4.

FIG. 5 shows an example of the conventional type, and is a cross-sectional view of the voltage coil 4 in the winding axis direction, and the same parts as in FIG. 4 are indicated by the same symbols.

12 is a central leg formed in the center of the core sheet 2; 13, 14, 15, 16 are rivets 6;
Rivet holes into which 7, 8, 9 are inserted, 17, 18
are flanges formed at both ends of the winding frame 5;
The central leg portion 12 of the iron core sheet 2 is inserted into the insertion hole 19 formed in the central portion of the iron core sheet 2 .

FIG. 6 is a front view showing the insertion hole 19 in the conventional type shown in FIG. 5, and the insertion hole 19 is formed with a rectangular cross section.

The problems of the conventional type will be explained below with reference to FIGS. 4, 5, and 6.

To incorporate the voltage core 3 into the voltage coil 4, insert the center leg 12 of the core sheet 2 into the insertion hole 19 of the winding frame 5.
However, since this insertion work is performed while slightly curving the core sheet 2, it is not possible to insert a predetermined number of core sheets 2 into the insertion hole 19 at once, and only one to four sheets can be inserted into the insertion hole 19. Insert the sheets one after another until the predetermined number is reached.

In the insertion work of the core sheet 2 as described above, if the gap 20 provided between the center leg portion 12 and the insertion hole 19 is large, the insertion work will be easier to perform, but on the other hand, the rivets 6, 7, 8, and 9 If the position of the integrated voltage core 3 fluctuates (wobbles) relative to the voltage coil 4 and the winding frame 5, problems may occur, and if the gap 20 is made smaller, the insertion work may become difficult. There are some problems.

(Purpose of the invention) The purpose of the invention is to solve the above-mentioned problems and to create a winding frame for the voltage coil that allows the core sheet to be inserted easily and at the same time prevents the position of the voltage core from fluctuating. It is to provide.

(Characteristics of the invention) In order to achieve the above object, the invention forms the length of one side of the insertion hole in the lamination direction of the core sheets to be larger than the length of the opposite side, and the length of the opposite side is set to The core sheet is inserted from one side of the insertion hole, and the stacked core sheets are pushed up toward the opposite side. shall be.

(Embodiment of the invention) FIG. 1 is a perspective view showing an embodiment of the invention, and FIG. 2 is a front view showing the insertion hole of the embodiment shown in FIG. The same parts as in FIGS. 4, 5 and 6 are designated by the same reference numerals.

1 and 2, the insertion hole 21 into which the central leg 12 of the core sheet 2 is inserted is
an upper side 22 with almost no gap with respect to the width of 2;
The lower side 23 provided with the gap 20 forms a substantially convex shape. Reference numeral 24 indicates a vertical gap between the voltage core 3, and a spacer is inserted to fill the gap as necessary.

When inserting the core sheet 2 into the insertion hole 21, the center leg portion 12 is first inserted from the lower side 23 side. This core sheet 2 is pushed up toward the upper side 22 by the central leg 12 that is inserted next, and the core sheets 2 are stacked toward the upper side 22 by the central leg 12 that is successively inserted. This insertion work can be easily performed due to the gap 20 provided on the lower side 23.

A predetermined number of central legs 12 are inserted and the gap 24 is
When the spacer is inserted into the spacer, vertical fluctuation (wobble) of each core sheet 2 is prevented. Also,
If the gap 24 is small, the spacer may not be inserted.

Next, each core sheet 2 is aligned, and rivets 6, 7,
When 8 and 9 are inserted and seated, an integrated voltage core 3 is constructed.

Since the voltage core 3 integrated as described above is tightly held by the upper side 22 with almost no gap in the left-right direction, fluctuations (wobble) in the left-right direction are also prevented.

FIG. 3 is a front view showing an insertion hole according to another embodiment of the present invention. The same parts as in FIGS. 1 and 2 are designated by the same reference numerals.

The insertion hole 25 of the embodiment shown in FIG. 3 has a trapezoidal shape formed by an upper side 22 having almost no gap with respect to the width of the central leg 12 and a lower side 23 having a gap 20, as in the embodiment shown in FIG. 2. The lower side 2
Insertion work is easily performed from the third side. The integrated voltage core 3 is tightly held by the upper side 22 with almost no gap in the left-right direction, and as in the embodiment shown in FIGS. It is something that can be prevented.

(Effects of the invention) As explained above, according to the invention, the length of one side of the insertion hole in the stacking direction of the core sheets is formed to be larger than the length of the opposite side, and the length of the opposite side is set to Since the length is set so that the central leg portion of the voltage core sheet can be inserted tightly, the core sheet can be inserted easily, and at the same time, fluctuations in the position of the voltage core can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figures are a front view showing the insertion hole of the embodiment shown in FIG. 1, FIG. 3 a front view showing the insertion hole in another embodiment of the present invention, and FIG. 4 a perspective view showing an example of the voltage element including the voltage coil. 5 is a sectional view showing an example of a conventional type, and FIG. 6 is a front view showing an insertion hole in the conventional type shown in FIG. 1... Voltage element, 2... Iron core sheet, 3... Voltage core, 4... Voltage coil, 5... Winding frame, 12...
...Central leg, 20...Gap, 21...Insertion hole, 2
2...Top side, 23...Bottom side, 25...Insertion hole.

Claims (1)

[Scope of utility model registration request] In a voltage coil winding frame having an insertion hole into which a central leg of a core sheet constituting a laminated core for voltage blocking is inserted, the length of one side of the insertion hole in the core sheet lamination direction is larger than the length of the opposite side. A winding frame for a voltage coil, characterized in that the length of the opposite side is set to a length such that the central leg of the iron core sheet is tightly inserted.