JPH043461Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a wire holding structure for connecting wires to a transformer. Specifically, the present invention relates to a wire holding structure for connecting wires to a transformer. This invention relates to an electric wire holding structure that does not cause disconnection or conductor breakage at the same location.

[Conventional technology and its problems]

As shown in FIG. 4, the overhead wire 1 is connected to the transformer 2 on the pole via a high voltage cutout 3, but the conventional connection of the wire 1 from the cutout 3 to the transformer 2 is To explain with reference to the figure, the insulation coating 1a of the electric wire 1 is stripped off to expose the conductor 1b, and the conductor 1b is inserted into the U-shaped notch 6 of the insulator skirt 5 of the electric wire connection terminal 4 of the transformer 2. Then, the conductor 1b is inserted into the conductor insertion hole 8 of the transformer terminal 7 in the insulator skirt 5, a washer 9 is inserted from the head of the terminal 7, and the conductor 1b is tightened with a holding nut 10.

However, this conventional connection structure
Since the retention of the electric wire 1b is not taken into account, vibrations of the electric wire 1 due to wind pressure etc. are directly transmitted to the electric wire connecting terminal part 4, and stress is repeatedly applied to the tightening part, causing metal fatigue of the conductor 1b and breaking the wire. There are concerns. In addition, the conductor 1b inserted into the conductor insertion hole 8 of the transformer terminal 7 is held down by the washer 9 and the holding nut 10, but the electric wire 1b is held down by the wind pressure.
The washer 9 and the retaining nut 10 move due to the vibration, weakening the tightening force, and the conductor 1 is removed from the wire connection terminal 4.
There is a risk that b will be missing.

[Purpose of invention]

The present invention takes the above points into consideration and aims to provide a wire holding structure for a wire connection terminal portion that eliminates the above concerns.

[Means to achieve the purpose]

In order to achieve the above purpose, in this invention,
A conventional U-shaped notch formed in the insulator skirt of a wire connection terminal of a transformer has a stepped part that engages with the inner surface of the insulator skirt, and a reinforcing part that fits into the inner edge of the U-shaped notch. and a wire holding member consisting of a vibration bending mitigation portion extending outward from the reinforcing portion is fitted through the reinforcing portion, and the end conductor of the wire tightly fitted into the wire insertion hole of the wire holding member is connected to the wire. It was designed to connect to the terminal in the terminal section.

[Effect]

According to the wire holding structure of the present invention configured in this way, when the lead-in wire vibrates due to wind pressure, etc.,
The stepped portion prevents the electric wire from being drawn out to the outside of the skirt portion, and the vibration is alleviated by the vibration bending relaxation portion extending outward, so that the electric wire is held and fixed to the insulator skirt portion via the wire holding member. Therefore, the vibrations are not directly transmitted to the conductor and terminal connection portion within the insulator skirt portion.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings and a procedure for connecting electric wires to terminals of a transformer. Note that the same reference numerals as above indicate the same items.

Reference numeral 11 denotes a casing of the transformer 2, and a transformer terminal 7 to which an end of a coil (not shown) is connected is led out of the casing 11 via a glass 12.

The transformer terminal 7 is connected to the glass 12 from the casing 11.
An insulator skirt part 5 with a long creeping surface and also serving as a rain cover is provided to cover the connection part 4 between the electric wire 1 and the terminal 7, and the skirt part 5 has a U-shaped cut through which the electric wire 1 passes. Section 6 is carved out.

A conductor insertion hole 8 is drilled in the transformer terminal 7 to receive the conductor 1b of the electric wire 1 to be connected, and a screw 13 is cut in the extension thereof, and the screw 13 is covered with an enamel cover 14 on the outside. Tanatsu 10
are screwed together.

The U-shaped notch 6 of the skirt portion 5 has a wire insertion hole 15 at the center and a stepped portion 16 on the outer periphery that engages with the inner surface of the skirt portion 5 near the transformer terminal 7. Reinforcement part 1 that fits into the inner edge of
A wire holding member 19 made of an elastic material such as rubber or plastic is provided with a vibration bending relaxation part 18 whose outer diameter gradually decreases in the portion extending to the opposite side of the wire holding member 7.
is fitted through the reinforcing portion 17. Note that this wire holding member 19 is produced in advance at a factory.

The conductor 1 is inserted into the wire insertion hole 15 of the wire holding member 19 by peeling off the terminal insulator (insulation coating) 1a.
Apply silicone grease or the like to the surface of the electric wire 1 with exposed portion b to improve the slippage and insert the electric wire 1, and insert the conductor 1b of the electric wire 1 into the conductor insertion hole 8.
The conductor 1b and the transformer terminal 7 are fastened with the nut 10 through the washer 9, and the connection between the transformer terminal 7 and the electric wire 1 is completed.

With this configuration, when the electric wire 1 from the high voltage cutout 3 vibrates due to wind pressure or the like, the end 16
This prevents the electric wire 1 from being pulled out to the outside of the skirt portion 5, and the vibration is alleviated by the vibration bending relaxation portion 18 extending outward, and the electric wire 1 is further transferred to the insulator skirt portion via the wire holding member 19. 5
Since the conductor 1b in the insulator skirt portion 5 and the terminal connection portion 4 are not directly transmitted to the conductor 1b, the vibration is not directly transmitted to the conductor 1b in the insulator skirt portion 5 and the terminal connection portion 4. Therefore, disconnection of the conductor 1b and loosening of the terminal connection portion 4 do not occur.

[Effect of idea]

Since the present invention is constructed as described above, the electric wire is securely held by the insulator and the wire holding part, and even if the electric wire vibrates due to wind pressure, etc., the conductor of the terminal connection part and the washer of the terminal connection part, No vibrations are transmitted to the nut. Therefore, there is no breakage of the conductor due to repeated stress or disconnection of the wire due to loosening of the nut, which is the case in the prior art, and the reliability of the terminal connection portion can be improved.

[Brief explanation of drawings]

Figure 1 is a front sectional view of the main part of an embodiment of the wire holding structure of the present invention, Figure 2 is a bottom view of Figure 1, Figure 3 is a left side view of Figure 1, and Figure 4 is a top view of the pillar. It is a schematic diagram of power distribution. 1...Electric wire, 1a...Insulator (insulation coating), 1
b...Conductor, 2...Transformer, 4...Wire connection terminal portion, 5...Insulator skirt portion, 6...U-shaped notch, 7...Transformer terminal, 8...Conductor insertion hole, 15
. . . Wire insertion hole, 16 . . . Step portion, 17 .

Claims (1)

[Scope of utility model registration request] A U-shaped notch formed in the insulator skirt of the wire connection terminal of the transformer has a stepped part that engages with the inner surface of the insulator skirt, and a reinforcing part that fits into the inner edge of the U-shaped notch and the reinforcing part. A wire holding member consisting of a vibration bending mitigation portion extending outward from the reinforcing portion is fitted through the reinforcing portion, and the insulator is stripped off at the end to expose the conductor into the wire insertion hole of the wire holding member. An electric wire holding structure for a transformer, characterized in that an electric wire is closely fitted and an end conductor of the electric wire is connected to a terminal of the electric wire connection terminal section.