JPS6038263Y2 - stationary induction appliance - Google Patents

Description

[Detailed description of the invention] This invention relates to a stationary induction electric appliance that is equipped with a crossbar for holding down the upper and lower end faces of an iron core like a transformer, and in particular has a structure that prevents loosening of the crossbar tensioning part due to withering of the crossbar insulator. This relates to stationary induction electric appliances.

In transformers, axles, etc., as shown in FIG. 1, the upper and lower parts of the iron core 11 are clamped in the stacking direction by an upper clamp 14 and a lower clamp 15 through an insulator 13, respectively, and the lower clamp 15 insulates the winding 12. The upper clamp 14 is provided with a fastening member 17 for fixing the winding.

Further, on the upper and lower end surfaces of the iron core 11, an upper cross bar 18 and a lower cross bar 19, each of which has both ends secured to a clamp by a fastening member 21 such as a bolt or a bolt nut, are provided through an insulator 20, respectively. The clamp fixes the laminated iron plates so that they do not pop out, and the lower crossbar 19 also serves as a leg for the entire contents, and the upper crossbar 18 also serves as a mounting base for attaching an interphase reactor, etc., for example, in a current regulator transformer. There is.

By the way, the insulator 20 interposed between the above-mentioned iron core 11 and the crossbar 18 or 19 is generally tightened together with the crossbar using a press rod, but after a long period of operation, the thickness becomes thin due to withering of the material. Fastening member 21
Looseness occurs.

When magnetic vibration is applied to this, the loosening becomes even larger and the fastening member 21 may eventually fall off. In particular, if the fastening member 21 of the upper crossbar 18 falls off, it may fall into the winding and cause a serious accident. There is a possibility that this may occur.

The object of the present invention is to provide a stationary induction electric appliance with excellent safety without the above-mentioned drawbacks.

The present invention will be described below with reference to embodiments shown in the drawings.

In FIGS. 2 and 3, 11 is an iron core, 14 is a clamp, 18 is a crossbar, and 21 is a fastening member, and each of these parts is the same as the part shown with the same reference numeral in FIG. 1.

Reference numeral 23 denotes a spacer plate made of a steel plate or the like, and has a wedge-shaped convex portion 24 on one side and is fixed by welding to the crossbar fastening surface of the clamp 14 in advance.The crossbar 18 is fastened on top of this spacer plate 23 by the fastening member 21. It will be worn.

25 is the crossbar 18 and iron core 11 that are removed from the press port etc.
This insulator 25 is provided with recesses 26 at both ends thereof to engage with the protrusions 24 of the spacing plate, and is tightly fastened together with the crossbar 18.

Note that the above structure shows only the upper crossbar side of the iron core, but the structure on the lower crossbar side is also similar, so a description thereof will be omitted.

According to such a configuration, both ends of the crossbar 18 are fastened to the clamp 14 via the steel spacing plates 23, so even if the crossbar insulator 25 becomes thin due to withering, there is no risk of loosening of the fastened portion. Therefore, the fastening member 21 can be reliably prevented from falling off.

Furthermore, since both ends of the crossbar insulator 25 are engaged with the spacing plate 23 fixed to the clamp, there is no risk of the crossbar insulator 25 being pulled out, and insulation properties are ensured.

In the above embodiment, the spacing plate 23 is fixed to the clamp side, but it may also be fixed to the crossbar 18.

In addition, the engaging portion between the spacing plate 23 and the crossbar insulator 25 is
As shown in the figure, the spacer plate 23 may be provided with a rectangular convex portion 24A, and the insulator 25 may be provided with a concave portion 26A that engages with the rectangular convex portion 24A. Alternatively, as shown in FIG.
A convex portion 26 that is provided with a rectangular concave portion 24B and engaged with the concave portion 24B.
B may be provided on the insulator 25, or the insulator 25 may be provided with a semicircular convex portion 24C on the spacer plate 23 and a concave portion 26C that engages with the semicircular convex portion 24C as shown in FIG.

In the embodiment shown in FIG. 7, a spacing plate 23 is fixed to the clamp 14, and a protrusion 27 is also fixed to the clamp 14 to accommodate the displacement of the crossbar insulator 25 in the board width direction. There is no need to provide an engaging portion on the insulator 25, and it is sufficient to simply have the ends of the insulator 25 abutted against each other.

As described above, according to the present invention, even if the crossbar insulator becomes thin due to withering, the crossbar fastening portion does not loosen, thereby reliably preventing inconveniences such as the fastening member falling off, thereby significantly improving safety.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional general static induction electric appliance, and FIG. 2 is a cross-sectional view of essential parts showing an embodiment of the static induction electric appliance according to the present invention.
FIG. 3 is a view taken along the line II in FIG. 2, and FIGS. 4 to 7 are plan views of essential parts showing other different embodiments of the present invention. 11... Iron core, 14... Clamp, 1
8... Cross bar, 21... Fastening member,
23... Spacing plate, 24... Protrusion, 25
...Insulator, 26...Recess.

Claims (1)

[Scope of utility model registration request] In a device in which a crossbar is provided on the end face of the iron core that is fastened by a clamp, and the crossbar is tightened by a bolt to the above-mentioned clamp, a spacing plate welded to either one of the crossbars and the clamp is provided, and a gap between the crossbar and the iron core is provided. 1. A stationary induction electric appliance, characterized in that a crossbar insulator is provided on the insulator, a convex portion is provided on one of opposing ends of the insulator and the spacing plate, and a concave portion that engages with the convex portion is provided on the other side.