JPH04322075A - Earth terminal and its installation structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a ground terminal used for grounding induced voltage in a house near an ultra-high voltage power transmission line.

0002

2. Description of the Related Art Conventionally, when attaching a ground terminal to a galvanized iron roof or the like for grounding, as shown in FIG. Alternatively, it was connected to the roof board by soldering. In the former case, tools are required to drill the holes, which reduces the aesthetic and commercial value of the house.Also, it is difficult to prevent the holes from rusting, and the holes may rust and come off within a few years. The latter is
A power source is required, and if there is no power source, a heated soldering iron must be used for installation, which takes a lot of time.

0003

[Problems to be Solved by the Invention] In view of the problems of the prior art, it is possible to install a ground terminal without requiring any tools or power source, and without reducing the aesthetic appearance of the house or the product value.
Moreover, it is an object of the present invention to provide a ground terminal that can provide reliable electrical contact and shorten construction time.

0004

[Means for Solving the Problems] A conductive metal plate 1, a braided wire 2 fixed to the metal plate 1 and exposed at least on the back side of the metal plate 1, and a grounding wire fixed to the metal plate 1. line 3
After adhering the exposed side of the braided wire 2 of the ground terminal A consisting of Covered with 5th grade.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a ground terminal A according to the present invention. A ground terminal A installed on a roof R serving as a grounded body is composed of a conductive metal plate 1, a braided wire 2 such as a plain braided copper wire, and a ground wire 3. Reference numeral 4 denotes a double-sided tape for bonding the ground terminal A onto the roof R, which is attached to the back surface of the metal plate 1. 5a and 5b are holes through which the braided wires 2 spaced apart in the metal plate 1 are passed. Reference numeral 6 denotes a tape such as aluminum tape that covers the upper part of the braided wire 2 after the metal plate 1 is pasted on the roof R using double-sided tape 4.

In the illustrated embodiment, both ends of an annular braided wire 2 are crimped 7 near one end of a metal plate 1. The end of the ground wire 3 is crimped 8 to the end of the metal plate 1. Further, the braided wire 2 is inserted into two holes 5a and 5b spaced apart from each other in the metal plate 1 as shown in FIG.
It is threaded through the metal plate 1 to form an annular shape, and is crimped and fixed on the front side of the metal plate 1 with both ends aligned. Although not shown, this braided wire 2
The braided wire 2 does not need to be annular, and the braided wire 2 is attached to the bottom surface of the metal plate 1.
The presence of this braided wire 2 makes it possible to
The contact between the ground terminal A and the grounded object such as the roof R is improved.

In the case of FIGS. 3 to 7, the metal plate 1 and the grounding wire 3
This is another embodiment in which the crimp terminal 9 for fixing is constructed separately. A ground terminal A' installed on the roof R consists of a crimp terminal 9 to which both ends of a braided wire 2 are fixed, and a metal plate 1. Reference numeral 4 denotes a double-sided tape for bonding the ground terminal A' onto the roof R, which is attached to the back surface of the metal plate 1. 5a and 5b are holes through which the braided wires 2 spaced apart in the metal plate 1 are passed. 6, after pasting the metal plate 1 on the roof R with double-sided tape 4,
This is an aluminum tape that covers the upper part of the braided wire 2. 3 is a ground wire fixed to one end of the crimp terminal 9.

A braided wire 2 is passed through holes 5a and 5b in the metal plate 1, and both ends of the braided wire 2 are crimped 10 to crimp terminals 9 and integrated. 9a is a hole provided in the crimp terminal 9, 9b is a hole provided in the metal plate 1, and screws 1 are inserted into these holes 9a and 9b.
1 (FIG. 3) and is fixed with a nut 12 (FIG. 3).

With the above structure, in order to attach it to the roof R, the lower surface of the metal plate 1 is first pasted to the surface of the roof R with double-sided tape 4. Next, cover the upper surfaces of the braided wire 2 and the metal plate 1 with a wide aluminum tape 6 to completely cover the braided wire 2 and the metal plate 1, and the process is completed.

Incidentally, the ground terminal A having the above configuration
The test results for electrical tests, weather resistance tests, strength tests, and electrolytic corrosion tests are shown below.

(Electrical test) Using a device as shown in FIG.
Or, when I connected A' and the galvanized iron plate 15, gradually increased the current, and measured the temperature of the ground terminal A or A' part with the thermometer 16, it withstood 34 A, which is the safe current for 1.6 mm annealed copper wire. This was confirmed.

(Weather resistance test) The test was carried out using a heat cycle tester 17 as shown in FIG. One cycle was 14 hours at 70°C, 1 hour at room temperature, 8 hours at -10°C, 1 hour at room temperature, 3
When cycled, the painted surface of the galvanized iron plate partially peeled off and lost its luster, but it was confirmed that there was no abnormality with the ground terminal A (or A').

(Strength test) As shown in FIG.
Or A') was pasted on a galvanized iron plate 15 and pulled using a spring gauge 18. It was found that the tensile strength of the double-sided tape alone was about 11 kg, but when the surface was covered with aluminum tape, it could withstand a tensile strength of about 24 kg.

(Electrolytic corrosion test) In order to test the electrolytic corrosion caused by joining different metals, contact between iron and tin was performed, but in this case, 0
．． In the case of 294V and copper and aluminum, the potential gradient is 1.6339V, and the former is 18% of this value, so it can be considered that there is no influence.

[0015]

[Effect] The ground terminal A or A' can be attached to the roof R using double-sided tape attached to the back side of the metal plate 1, and the braided wire 2 and the upper part of the metal plate 1 can be attached with aluminum tape. Since it is covered with the plastic layer 6, not only the strength is reinforced, but also corrosion of metal parts such as the roof can be prevented. Installation is with double-sided tape.
The work is extremely easy as it only needs to be attached using adhesive such as glue. Since the earth terminal A or A' is attached and the upper part thereof is covered, the mounting bolts and the like are not exposed as in the conventional case, and the appearance is excellent. By using the braided wire 2, even if the mounting surface has irregularities, it will fit easily and a reliable electrical connection can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a ground terminal A according to the present invention attached to a roof, which is a grounded surface.

FIG. 2 is a perspective view of FIG. 1.

FIG. 3 is a cross-sectional view of the ground terminal A' in FIG. 1 attached to the roof.

FIG. 4 is a plan view of the ground terminal A'.

FIG. 5 is a plan view of only the ground terminal A'.

FIG. 6 is a side sectional view of the ground terminal A'.

FIG. 7 is a back view of the ground terminal A'.

FIG. 8 is a sectional view of a known ground terminal.

FIG. 9 is a perspective view of the electrical testing device.

FIG. 10 is a perspective view of a weather resistance test device.

FIG. 11 is a perspective view of the strength testing device.

[Explanation of symbols]

A, A' Ground terminal R Roof 1 Metal plate 2 Braided wire 3 Ground wire 4 Double-sided tape 5a, 5b hole 6 Aluminum tape 7, 8, 10 Crimp part 9 Crimp terminal 9a, 9b hole 11 Screw 12 Nut 13 Current generator 14a, 14b Conductor wire 15　Tanium plate 16 Thermometer 17 Heat cycle tester 18 Spring meter

Claims (4)

[Claims] Claim 1: A conductive metal plate (1), the metal plate (
A braided wire (2) fixed to the metal plate (1) and exposed at least on the back side of the metal plate (1), an adhesive attached to the back side of the metal plate (1), and a braided wire (2) fixed to one end of the metal plate (1). Ground wire (3)
A ground terminal characterized by comprising: [Claim 2] 2 spaced apart in the longitudinal direction of the metal plate (1)
2. An earth terminal according to claim 1, characterized in that a braided wire (2) is looped through the two holes (5a and 5b) and both ends of the braided wire (2) are fixed to the metal plate (1). [Claim 3] Both ends of the braided wire (2) are connected to crimp terminals (9).
3. An earth terminal according to claim 2, wherein the crimp terminal (9) is fixed to the metal plate (1). 4. After bonding the ground terminal to the grounded object using the adhesive attached to the back side of the conductive metal plate (1), tape (6) is attached above the metal plate (1). A mounting structure for a ground terminal characterized by covering it with etc.