WO2005017290A1

WO2005017290A1 - Street light foundation

Info

Publication number: WO2005017290A1
Application number: PCT/KR2004/002023
Authority: WO
Inventors: Sung Bum Hong
Original assignee: Hyunam Electicin Stallation Co., Ltd.
Priority date: 2003-08-14
Filing date: 2004-08-12
Publication date: 2005-02-24
Also published as: KR100535826B1; JP2007502379A; KR20050015899A; JP4079280B2

Abstract

A hollow streetlight foundation in which electric wires can be prevented from being broken when pulling the electric wires. The hollow streetlight foundation includes a chamber formed with an opening, an electric wiring conduit connected to the chamber and exposed to the outside of the hollow streetlight foundation, full-threaded bolts fixed to the chamber, a concrete foundation for accommodating the chamber, and a streetlight mast connected to the full-threaded bolts. Electric wires are connected to the electric wiring conduit, and are formed with wound portions by being wound several times in the chamber. According to the present invention, even if electric wires, connecting one streetlight with another streetlight, are broken or their coverings are removed by being pulled by an excavator, during constructions, such as construction of gas pipelines, water and sewage pipes, underground cables, landscaping, or the like, shut-off and electric leakage can be prevented.

Description

[DESCRIPTION] [Invention Title] STREET LIGHT FOUNDATION

[Technical Field] The present invention relates to a hollow streetlight foundation, and more particularly to a hollow streetlight foundation having a chamber, forming an inner central portion thereof, in which electric wires passing through the chamber are accommodated as they are wound several times, so as to prevent the electric wires from being pulled and broken out due to excavator construction, such as construction of gas pipelines, water and sewage pipes, underground cables, landscaping, or the like.

[Background Art] Korean Utility Model Registration No. 20-0257937(Application No. 20-

2001-0025917) has proposed a manhole for streetlight wiring. However, according to the above-mentioned conventional art, the manhole for streetlight wiring is installed at one side of a streetlight foundation. Since only electric wires, connected from the inside of the manhole to other units, have wound parts, when the electric wires are pulled by the excavator, or the like, only one ends of the electric wires are unwound, so that there is a high possibility of breaking the electric wires, and even if not broken, there is very high possibility that the covering of the electric wires is removed. Since the streetlight foundation and the manhole must be installed, a large area of the road must be required.

[Disclosure] [Technical Problem] Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a streetlight foundation having a chamber, formed an inner central portion thereof, in which electric wires passing through the chamber are accommodated as it wound several times.

[Technical Solution] In accordance with an aspect of the present invention, the above and other objects can be accomplished by the provision of a hollow streetlight foundation including a chamber formed with an opening, an electric wiring conduit connected to the chamber at one end thereof through the opening of the chamber, and exposed outside the hollow streetlight foundation, full-threaded bolts fixed to the chamber, a concrete foundation for accommodating the chamber, and a streetlight mast connected to the full-threaded bolts. Preferably, electric wires pass through a central portion of the streetlight mast, are connected to the electric wiring conduit, and are formed with wound portions by being wound several times in the chamber.

[Advantageous Effects] According to the present invention, even if electric wires, connecting one streetlight with another streetlight, are broken or their coverings are removed by being pulled by an excavator, during constructions, such as construction of gas pipelines, water and sewage pipes, underground cables, landscaping, or the like, shut-off and electric leakage can be prevented. Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

[Description of the Drawings] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: Fig. 1 is a schematic perspective view illustrating a streetlight foundation according to the present invention; Fig. 2 is a cross sectional perspective view illustrating the streetlight foundation according to the present invention; and Fig. 3 is a perspective view illustrating the installation of a mast on the streetlight foundation according to the present invention.

[Best Mode] Hereinafter, a streetlight foundation according to the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are used as examples for the purpose of describing the hollow streetlight foundation according to the present invention but the present invention is not limited thereto. Fig. 1 is a schematic perspective view illustrating a streetlight foundation according to the present invention. As shown in Fig. 1 , at the central portion of the streetlight foundation there is a chamber 10. The chamber 10 is a hexahedron having chamfered lower corners. The chamfering serves to easily gather water in the chamber 10, but it is not necessary to chamfer the lower corners. The chamber 10 is formed with an opening at the upper side thereof for connecting a connecting pipe 12. The chamber 10 is formed with four openings for electric wiring conduits (not shown) at lower sides, but if necessary, 2 or 3 openings may be used. Moreover, the chamber 10 is also formed with an opening at the bottom for connecting a drain pipe 14. The chamber 10 is made of a metal plate, a stainless steel plate, and synthetic resin, or the like, a drain pipe, and the shape of the chamber 10 may be changed and modified into other shapes, such as a hollow cylinder, a hollow hexagonal column, or the like. Full-threaded bolts 30 are welded on corners of the chamber 10. The full-threaded bolts 30 may be fixed to the chamber 10 by various ways other than welding. Lower ends of the full-threaded bolts 30 are attached to a copper plate 70, and upper sides of the full-threaded bolts 30 are grounded to the copper plate 70 through ground wires 72. The chamber 10 is enclosed by a concrete foundation 40. Although the concrete foundation 40 has a regular trapezoidal cross-section in the drawing, the cross-section of the chamber 10 may be variously changed or modified. A streetlight mast 50 is coupled to upper ends of the full-threaded bolts 30. The connecting pipe 12 is inserted into a central hole of the streetlight mast 50. Fig. 2 is a cross sectional perspective view illustrating the streetlight foundation according to the present invention. As shown in Fig. 2, the chamber 10, the connecting pipe 12, the drain pipe 14, the full-threaded bolts 30, and the concrete foundation 40 are identical with the description with reference to Fig. 1. Lower sides of the chamber 10 are formed with two to four openings (only 2 openings in the drawing) through which the electric wiring conduits 20 are connected. Although the connecting pipe 12, the drain pipe 14, and the electric wiring conduits 20 are depicted as being directly connected to the chamber 10 in the drawing, for the purpose of easy connection to the openings of the chamber, connectors (not shown) may be used. Since the connectors for connecting the pipes and conduit to the opening are well-known components, they are omitted in the drawing. The copper plate 70 is formed with a hole at a central portion thereof. The lower end of the drain pipe 14 is inserted into the hole and is exposed to the ground so as to drain water. The electric wires 60, not shown in Fig. 1, are inserted into the chamber 10 via the connecting pipe 12 from the streetlight mast (not shown). The electric wires 60 are formed with wound parts 62 by being wound several times in the chamber 10, and are connected to another streetlight mast outside the concrete foundation 40. The other streetlight mast is also installed on the streetlight foundation according to the present invention. Since there are other hollow streetlight masts to the right and left of one streetlight mast, the number of the electric wires 60 is two, or may be 3 or 4 at a branch point. Here, the electric wires 60 are electric cables. Fig. 3 is a perspective view illustrating the installation of a mast on the streetlight foundation according to the present invention. As shown in Fig. 3, the full-threaded bolts 30 are inserted into coupling holes 54 of the streetlight mast 50, and nets 52 are fastened on the full-threaded bolts 30. The connecting pipe 12 is inserted into the central opening of the streetlight mast 50, and the electric wires 60 are connected to the streetlight (not shown) via the central opening of the streetlight mast 50. If the electric wires 60 are pulled between the streetlight masts 50 by the excavator, or the like, it is possible to disassemble the streetlight mast 50 from the concrete foundation 40 and insert ones hands or tools into the connecting pipe 12 so as to pull the electric wires or to connect additional electric wires. The connecting pipe 12 can be shorter than that depicted in the drawing depending on work side conditions. If there is no risk of flooding, the connecting pipe 12 is lowered so that the height of the connecting pipe 12 may be equal to the height of the full-threaded bolts 30. The manufacturing process of the hollow streetlight foundation according to the present invention will be described by referring to Figs. 1 and 2. First, the chamber 10 is prepared and horizontally welded with the full- threaded bolts 14 at the corners of the chamber 10. The openings of the chamber 10 are connected with the connecting pipe 12, the drain pipe 14, and electric wiring conduits 20 by the connectors. The copper plate 70 with the central hole is manufacture at other site. The chamber 10 with the full-threaded bolts 14 is placed on the copper plate 70, and the full-threaded bolts 14 are fixed to the copper plate 70. The central hole of the copper plate 70 is aligned to the drain pipe 14. The full- threaded bolts 14 may be welded on the copper plate 70. Or the copper plate 70 may be formed with holes corresponding to the full-threaded bolts 14 so as to be fastened by nuts. If necessary, the upper ends of the full-threaded bolts 14 may be connected to the copper plate 70 by the ground wires. A cast for forming the contour of the concrete foundation 40 is manufactured at other site. When the chamber 10 is inserted into the cast, the cast is formed with openings at proper portions thereof and the electric wiring conduits 20 are inserted into the openings to be exposed outside the cast. Then, concrete (ready mixed concrete) is poured into the cast. The concrete surface is cured for a predetermined time and the cast is removed from the chamber 10. The above-described manufacturing process can be performed on level ground, or on an excavated site where the streetlight will be installed. If necessary, the chamber may be manufactured in a factory and transported to the installation location. When pouring the concrete into the cast, it is preferable to use a vibrator for applying vibration to the concrete so as to uniformly fill the cast.

[Mode for Invention] The hollow streetlight foundation according to the present invention, includes a chamber formed with an opening, an electric wiring conduit connected to the chamber at one end thereof through the opening of the chamber, and exposed outside the hollow streetlight foundation, full-threaded bolts fixed to the chamber, a concrete foundation for accommodating the chamber, and a streetlight mast connected to the full-threaded bolts, wherein electric wires pass through a central portion of the streetlight mast, are connected to the electric wiring conduit, and are formed with wound portions by being wound several times in the chamber. When the ground resistance of the streetlight mast is insufficient to meet standards, it is preferable to place the copper plate at the lower side of the concrete foundation and to connect the streetlight mast to the copper plate with a ground wire. Since the chamber filled with water due to flooding or rain, the chamber is formed with the drain hole at the bottom. One end of the drain pipe is connected to the drain hole of the chamber and the other end of the drain pipe is exposed to the concrete foundation and/or to the lower side of the copper plate.

[Industrial Applicability] The hollow streetlight foundation according to the present invention may substitute for a conventional streetlight foundation. According to the present invention, even if electric wires, connecting one streetlight with another streetlight, are broken or their coverings are removed by being pulled by an excavator, during constructions, such as construction of gas pipelines, water and sewage pipes, underground cables, landscaping, or the like, shut-off and electric leakage can be prevented. Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

[CLAIMS]

[Claim 1] A hollow streetlight foundation comprising: a chamber formed with an opening; an electric wiring conduit connected to the chamber at one end thereof through the opening of the chamber, and exposed to an outside of the hollow streetlight foundation; full-threaded bolts fixed to the chamber; a concrete foundation for accommodating the chamber; and a streetlight mast connected to the full-threaded bolts, wherein electric wires pass through a central portion of the streetlight mast, are connected to the electric wiring conduit, and are formed with wound portions by being wound several times in the chamber.

[Claim 2] The hollow streetlight foundation as set forth in claim 1, further comprising: a copper plate disposed at a lower side of the concrete foundation; and a ground wire for connecting the streetlight mast to the copper plate.

[Claim 3] The hollow streetlight foundation as set forth in claim 1 or 2, wherein the chamber is formed with a drain hole at the bottom thereof, and one end of a drain pipe is connected to the drain hole of the chamber and the other end of the drain pipe is exposed to the concrete foundation and/or to a lower side of the copper plate.