JPH043462Y2 - - 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, the vibration of the electric wire 1 due to wind pressure etc. is directly transmitted to the electric wire connecting terminal part 4, and stress is repeatedly applied to the tightened 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 tightened due to 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 reinforcing part is molded onto the end of the wire with the terminal conductor exposed in a conventional U-shaped notch formed in the insulator skirt part of the terminal part, and has a small-diameter stepped part that fits into the notch. A wire holding member consisting of the implanted tightening band and a vibration bending relaxation section extending outward from the reinforcing section is fitted through the reinforcing section, the terminal conductor is connected to the transformer terminal, and the tightening band is attached to the insulator skirt. The electric wire holding member is fastened and held to the insulator skirt part by winding and fastening it around the outer periphery of the insulator skirt part.

[Effect]

According to the electric wire connection terminal of the present invention configured as described above, when the lead-in electric wire vibrates due to wind pressure, etc., the vibration is alleviated by the vibration bending mitigation part extending outward, and the electric wire is fixed to the electric wire holding member. Since it is held and fixed to the insulator skirt part through the insulator skirt part, the vibration is not directly transmitted to the conductor and terminal connection part in the insulator skirt part.

〔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 has a long creeping surface between the casing 11 and the terminal 7, and an insulator skirt portion 5 that also serves as a rain cover is provided to cover the connection portion 4 between the electric wire 1 and the terminal 7. A U-shaped notch 6 is provided through which the electric wire 1 passes.

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 electric wire 1 is inserted into the U-shaped notch 6 of the skirt portion 5, and a small-diameter step portion 16 is provided on the outer periphery of the upper end of the skirt portion 5 to fit into the notch 6 near the transformer terminal 7.
The reinforcing part 17 has a tightening band 15 implanted in the reinforcing part 17, and the part extending toward the electric wire 1 has a vibration bending relaxation part 1 whose outer diameter gradually becomes smaller.
A wire holding member 19 made of an elastic material such as rubber or plastic and provided with a wire holding member 19 is fitted therein. This electric wire holding member 19 is molded in advance at the end portion of the electric wire 1 at a factory.

The small-diameter stepped portion 16 of the wire holding member 19 molded on the wire terminal portion is fitted into the U-shaped notch portion 6, and the tightening band 15 is wound around the outer circumference of the insulator skirt portion 5 and fastened. 1b is inserted into the conductor insertion hole 8, and the conductor 1b and the terminal 7 are fastened with the nut 10 through the washer 9, thereby completing the connection between the transformer terminal 7 and the electric wire 1.

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 the drawing]

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
...Tightening band, 16...Small diameter stepped portion, 17...
Reinforcement part, 18... Vibration bending relaxation part, 19... Electric wire holding member.

Claims (1)

[Scope of utility model registration request] A reinforcing part having a small-diameter stepped part that is molded onto the end of the electric wire with the terminal conductor exposed in a U-shaped notch formed in the insulator skirt part of the electric wire connection terminal part of the transformer and that fits into the notch. A wire holding member consisting of a tightening band implanted in the reinforcing portion and a vibration bending relaxation portion extending outward from the reinforcing portion is fitted through the reinforcing portion, and the terminal conductor is connected to the transformer terminal, and the tightening band An electric wire holding structure for a transformer, characterized in that the electric wire holding member is fastened to the insulator skirt by winding and fastening the wire around the outer periphery of the insulator skirt.