JPH10191541A - Underground concrete-made buried box with electric shock prevention and cable run protection conductor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to definitely and economically attaching an earth pole to an underground concrete-made buried box as electric facilities. SOLUTION: An earth pole 2 is attached to an outer surface of an underground concrete-made buried box 1 as electric facilities, and this earth pole 2 is connected from the inner side of the underground buried box 1 to a grounding wire 3 penetrating through an outer wall or the bottom in the underground concrete-made buried box for preventing electric shock and cable run protection conductors. Adequate installation of the earth pole can be inspected before burying, and thus it is not necessary to inspect by digging after the burying, thereby simplifying and quickening the burying work economically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor for preventing electric shock and protecting electric circuits as electric equipment (hereinafter simply referred to as a ground electrode).
The present invention relates to an underground box made of concrete.

[0002]

2. Description of the Related Art Conventionally, when a transmission / distribution line or a communication line is installed underground, a ground electrode is provided in a concrete underground box for installing and connecting power ground equipment such as a transformer. A connection terminal for attachment was provided, and another earth electrode was attached at the time of embedding.

[0003]

The work for burying a concrete buried box as an electric facility is usually carried out by a civil engineer, and the work for mounting a ground electrode required for the buried box is required. Is to be carried out by an electrical installation contractor. For this reason, at present, after the civil engineer has buried the underground buried box, the electric equipment supplier has dug around the underground buried box to perform the earth pole connection work.

When a civil engineer also handles electrical equipment, it must have sufficient technical knowledge for attaching the ground electrode and work as designed, but actually bury the concrete as an electrical equipment in the ground. The worker filling the box,
In many cases, they are not experienced in electric work, so there is a problem that connection and the like remain uneasy, and electric power companies and telecommunication companies hope that an electric equipment supplier will install the earth pole.

[0005] If the civil engineer installs the earth pole after the burial of the underground box by the electrician, it is necessary to dig the surrounding area, which requires a lot of time and labor. The cost increases and there is much waste.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to an electric equipment in which a ground pole is connected to a ground wire in advance on the outer surface of a concrete underground box before embedding. Since it is attached by a contractor and it is only necessary to bury it as it is at the time of construction or remove the temporary fixing, there is no worry about mounting of the earth pole, and no problem will occur even if anyone buries the underground burying box .

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a ground electrode is provided on the outer surface of a concrete buried box as electrical equipment, and the ground electrode is penetrated from the inside of the buried box to the outer wall or bottom. It is a concrete ground buried box with a ground electrode connected to a ground wire or a ground wire connection bolt.

[0008] The ground electrode is closely attached to the outer surface of the underground box, fixed to the outer surface of the underground box with a gap, and temporarily fixed to the outer surface of the underground box. In some cases, it may be removed and embedded at the time of embedding.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a front view showing a concrete buried underground box with a ground electrode according to the present invention, FIG. 2 is a plan view, and FIG. FIG. 4 is a longitudinal sectional view, and FIG. 4 is an enlarged sectional view showing three examples of the mounting form of the ground electrode.

In the figure, reference numeral 1 denotes an underground box, which is formed of a rectangular concrete box, and has a ground equipment mounting portion 1a and a manhole portion 1b formed on the upper surface, and the ground equipment mounting portion 1a is shown by a virtual line. Transformer T is attached,
A manhole cover M is attached to the manhole portion 1b.

The front and rear walls are provided with eight thin portions 1c each of which can be opened as necessary. Each of the thin portions 1c is not shown in the figure, but the left and right walls are used to pass conduits. A required number of holes are provided therethrough.

Reference numeral 2 denotes a ground electrode, which is made of a plate or a punched plate made of copper or a copper-based alloy having high corrosion resistance and high conductivity, the size and the number of which are determined by the resistance value.
The ground wire 3 which is appropriately disposed on the front, rear, left and right surfaces and the lower surface of the underground box 1 and penetrates the outer wall or bottom of the underground box 1 is connected.

The attachment of the earth electrode 2 is carried out by embedding it in the outer surface as shown in FIG.
As shown in FIG. 3B, a space S is provided between the outer surface and the spacer 4 between the outer surface and the outer surface, and the outer surface is temporarily fixed by a temporary fixing means using an adhesive tape 5 or the like as shown in FIG. In some cases, the temporary fixation is removed at the time of burial and the burial is buried underground in a state indicated by a virtual line.

The three types of mounting of the earth poles 2 are different in length and length, and FIG. 3A has an advantage that it does not protrude from the outer surface of the underground buried box 1 and does not hinder handling.
There is a drawback that the direct contact area is only one side, and in (B) the contact area is large on both sides due to the clogging of the gap S with earth and sand, but it is inconvenient to handle and transport because it protrudes from the outer wall surface, and is damaged. (C) is superior in terms of function because both sides are completely in contact with the ground, but it is troublesome when burying it, and the temporary fixation comes off during transportation etc. and the ground electrode 2 may be damaged. We are concerned, but we choose one depending on the situation.

[0015]

The present invention is embodied in the form described above and has the following effects.

Necessary earth poles are pre-installed in the underground buried box, so there is no need to attach earth poles at the time of embedding, and even civil engineers who have no experience in electrical work can easily bury them. And a connection failure or the like can be eliminated.

Before the burial, it is possible to check that the ground electrode is correctly attached, so that it is not necessary to dig and inspect after the burying, and the burying work can be performed simply, quickly and economically.

[Brief description of the drawings]

FIG. 1 is a front view showing a concrete underground burying box according to an embodiment of the present invention in a buried state.

FIG. 2 is a plan view of a concrete buried underground box.

FIG. 3 is a sectional view taken along line XY of FIG. 1;

FIGS. 4A and 4B are partially enlarged cross-sectional views showing three examples of a mounting state of a ground electrode, in which FIG. 4A is embedded and fixed on an outer surface, and FIG. 4B is mounted with a gap kept between the outer surface. (C) is temporarily fixed to the outer surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Underground buried box 1a Ground equipment attachment part 1b Manhole part 1c Thin part 2 Earth pole (conductor for electric shock prevention and electric circuit protection) 3 Ground wire 5 Adhesive tape (temporary fixing means)

Claims (4)

[Claims] An electric shock prevention and electric circuit protection conductor is attached to an outer surface of a concrete underground box as electric equipment, and the electric shock prevention and electric circuit protection conductor is attached to an outer wall or an inside wall of the underground box. A concrete underground box with a conductor for prevention of electric shock and protection of electric circuit, wherein the box is connected to a ground wire or a ground wire connecting bolt penetrating the bottom. 2. The concrete underground box with a conductor for preventing electric shock and electric path protection according to claim 1, wherein the conductor for preventing electric shock and electric path protection is closely attached to the outer surface of the underground box. 3. The concrete underground box with a conductor conductor for preventing electric shock and electric circuit protection according to claim 1, wherein the conductor conductor for preventing electric shock and electric circuit protection is attached to the outer surface of the box underground with a gap. 4. The concrete underground according to claim 1, wherein said electric shock prevention and electric circuit protection conductor is temporarily fixed on an outer surface of said underground box for removal and embedding. Buried box.