JPH043460Y2 - - 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 omitted.

[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,
An electric wire consisting of a reinforcing part having a groove that fits into the inner edge of a conventional U-shaped notch formed in an insulator skirt part of an electric wire connection terminal part of a transformer, and a vibration bending mitigation part extending outward from the reinforcing part. The holding member is fitted through the reinforcing portion, and the end conductor of the wire closely fitted into the wire insertion hole of the wire holding member is connected to the terminal of the wire connection terminal portion.

[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 vibration is alleviated by the vibration bending mitigation section extending outward, and since the electric wire is held and fixed to the insulator skirt section via the wire holding member, the vibration is transmitted to the conductor and terminal connection section inside the insulator skirt section. It cannot be communicated directly.

〔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 an insulator 12.

The insulator 12 is connected from the casing 11 to the transformer terminal 7.
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 notch through which the electric wire 1 passes. 6 is installed.

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 in the center, a reinforcing portion 17 having a groove 16 on the outer periphery that engages with the inner edge of the notch 6 near the transformer terminal 7, and a reinforcing portion 17 on the opposite side. A wire holding member 19 made of an elastic material such as rubber or plastic is fitted into the side-extending portion, and is provided with a vibration bending relaxation portion 18 whose outer diameter gradually decreases. 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 vibration is alleviated by the vibration bending relaxation part 18, and the electric wire 1 is connected to the insulator via the electric wire holding member 19. Since it is held and fixed to the skirt portion 5, 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 power distribution schematic diagram. 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 . . . Groove portion, 17 .

Claims (1)

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