CZ20014280A3 - Light tower provided with base radio station for mobile telephony - Google Patents

Abstract

Light tower provided with base radio station for mobile telephony comprising a transmission and power supply unit (14), situated in a housing compartment (2) of the shaft (1) of the tower, and a system of antennas (15), protected externally by case (20), antennas which are fastened on the shaft (1) in its summit portion below a head (4) covered by a dome (5) and provided with illuminating bodies (7), the transmission and power supply unit (14) being connected to the antenna system (15) by means of data transmission cables (16) positioned within the shaft (1).

Description

The present invention relates to a light tower provided with a base radio station for mobile telephony.

The term light-bearing tower, light tower or simply tower means a light pole having a column of considerable height, greater than 15 meters, on which a certain amount of wide-angle headlamps is located near its apex.

BACKGROUND OF THE INVENTION

In the early 1960s, light towers began to develop in Europe on a large scale, ie when it was found that the solution of multiple low-altitude lighting poles led to confusion and a potential danger to motorists.

With continuous lamp development and refinement of light fixture structures, an outdoor lighting system using much more powerful light sources on light towers is highly effective.

Current light towers, usually up to 50 m high, are usually equipped with a so-called movable crown supporting lights or wide-angle headlamps that surround the column and can usually move up to a stable position inside the dome and lower to a position near the base of the column for maintenance, using the appropriate control system.

Light towers are becoming more and more widespread, due to the indisputable advantages of achieving better night visibility and their more than acceptable decoration of the environment, especially on wide areas such as intersections, motorway entrances and exits, car parks, city centers, container yards , airports, areas • 9 · · 9 «9

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999 · 999 9999 9 «999 automotive services, industrial areas, sports complexes, shopping malls, railway stations and many more.

Based on developments in the art and the requirements of both logistics and the environment, it is an object of the present invention to streamline the simultaneous expansion of base stations for mobile telephony, respecting transmission technology and the need to place the radiation system in maximum visibility, It shall be so placed as to cause the least possible difficulties with regard to the regulations governing the permissible levels of electromagnetic field strength.

Therefore, light towers that are tall and located in open areas with a wide range of visibility become an ideal solution to the problem that exists in the field of telecommunications, especially when installing base radio stations for mobile telephony.

SUMMARY OF THE INVENTION The object of the present invention is therefore to enable the installation of base stations with a lower environmental impact, with an aesthetically acceptable and functionally advantageous combination with a tower structure, which is therefore not expensive to build and easy to access and easy to maintain compared to conventional installations. .

SUMMARY OF THE INVENTION

This task is solved by a light tower with a base radio station for mobile telephony, comprising a column provided with a box chamber at the bottom, accessible by an opening for the passage of the operator's hand or torso and topside by a head covered with a dome. which are supported within the column and supported by a support crown surrounding the column and movable by means of a lifting system arranged in a housing, according to the invention, comprising a power supply transmission and supply unit located in the housing of the column and an antenna a system mounted on a column at the top of the head, with the transmission and power supply system; ··· ··· ······· · The unit is connected to an antenna system via m cables for data transmission located inside the column.

The base radio station according to the invention can be located on all types of light towers provided with a movable crown control system supporting the lighting bodies. By way of example only, for purposes of overall understanding, the attached drawings illustrate an application to a light tower manufactured by ILVA Pali Dalmine IPD s.r.l. Naturally, the characteristics of form and functional technology of known light towers fall outside the scope of the present invention.

Overview of the drawings

Exemplary embodiments of the light tower according to the present invention are illustrated in the accompanying drawings, in which Fig. 1 schematically shows a front view of a first light tower according to the invention;

Fig. 2 shows schematically a front view of a second light tower according to the present invention;

Fig. 3 shows schematically a third embodiment of a light tower according to the present invention;

Figure 4 is a schematic cross-sectional view of the illuminating head of the second light tower of Figure 2; Fig. 5 schematically shows section A-A of Fig. 4;

Figure 6 is a partial schematic front view of the light tower base of Figure 3.

DETAILED DESCRIPTION OF THE INVENTION

The light tower embodiments of Figures 1 to 3 (e.g., 20, 25 and 30 m high) include a conical column 1 with a circular or polygonal cross-section, a box chamber 2 located on the base portion 3 of the column 1 and a lighting plate at the top of the column.

The column 1 normally comprises a plurality of truncated cones, preferably of polygonal cross-section, connected together by overlapping fixed joints.

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The base part 3 of the tower can be provided either with a base plate attached to a cement base base using screws or with a column as such inserted in a base base (not shown here). The box chamber 2 formed on the base portion has an access opening 30 for the operator's hand or torso. The aperture 30 allows access to the means for supplying power to the lighting bodies and the system 31 for lifting them to the light tower, shown only as an example in Figure 2.

Referring to Fig. 4, the column 1 carries at its apex part an illuminating head 4 covered by a dome 5 terminated by a mast 6. The illuminating head 4 is provided with illuminating bodies 7 to which energy is supplied by cables (not shown) passing inside the column 1. and retaining crown 8 surrounding the column 1 together with brackets 9 for attaching wide-angle headlamps or lighting fixtures and corresponding accessories.

The crown 8 for supporting the illumination bodies 7, shown in more detail in the rest position in Fig. 4, is shown schematically in the direction of the arrow F in Fig. 2. In rest conditions the support crown 8 is held by its pivot pins 10 inside the flexible seats 100 for clamping it to the fixed drive head 11. including transmission devices for lifting ropes and electric cables 44 (FIG. 2). The crown 8 is movable by means of a lifting system housed in the box chamber 2, essentially a winch which can be actuated, for example, by means of a trolley mounted drive unit 12 (Fig. 2). The traction unit 12 mounted on the trolley, controlled by the pushbutton switch 13 and engaged with the control system, allows the movable crown to be raised and lowered in order to replace and maintain the illuminators.

The light tower shown in Fig. 1 could have a fixed crown and in this case, the head maintenance and the replacement of the lighting fixtures would be carried out by means of a ladder or suspension platforms.

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According to the present invention, the light tower is provided with a base radio station comprising a power supply and supply unit 14 (not shown in more detail because of the known embodiment) located in the box chamber 2 in the base portion of the column 1 and powered by the same supply means. energy such as lighting fixtures and radio or antenna systems attached to the columns 1 at the top of the head, generally indicated as 15. The power supply unit 14 is connected to the antennas by data transmission cables 16 passing through the cutout 43 in the column 1; located inside (fig. 4). The antenna system 15 comprises at least one antenna (three antennas shown in FIGS. 4 and 5) attached by means of brackets 17 to a pair of annular plates 18 to be detachably secured to the pole 6. The inclination of the brackets 17 can be adjusted in a known manner.

The antenna system 15 is fixed in position by at least one steel wire 19, also passing through the cutout 43 inside the pole 1 and anchored to the pole 1 in the box chamber 2. This secure anchorage is also needed in the case of replacing the antennas.

As shown in the figures, the antenna system is covered circumferentially to the column 1 by a protective sheath 20 made of a material that is permeable to electromagnetic radiation and connected to the column by at least one planar plate 21 (FIG. 4). The protective sheath 20 may be formed from a single housing or at least two housing parts. It may have a cylindrical or prismatic side shape and may be tapered downward to the column 1 and the planar plate 21 in the portion 210.

As shown in FIG. 4, the protective sheath 20 is also preferably removably attached to a structure that is integrally formed with the column 1 within the dome 5 by means of a second planar plate 211. The protective sheath 20 may advantageously be made of fiberglass reinforced plastic .

Typically, according to the present invention, the outer diameter (d) of the protective sheath 20 is smaller than the inner diameter (D) of the movable support crown 8 (FIG. 4). If the light tower has a movable crown, the lifting and lowering of the movable crown must not hinder • ···· 4 ♦ · 44 4

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444 * 444 4444 44 »Ι · normal operations to maintain, repair, or replace lighting fixtures from a protective enclosure of such dimensions that they do not interfere with the vertical movement of the movable crown.

Since the insertion of the power supply and transmission unit 14 reduces the space available for operation within the cabinet both of the normal light tower equipment and the light tower attachment according to the present invention, it is therefore advantageous for a convenient work to enlarge the lower part of the column 1 in the box chamber 2 in which the power supply and transmission unit 14 is located. The most common service operations on the unit 14 relate to an external portable computer that can be used to obtain operating data and make corrections or adjustments to the programs. This enlarged housing 2 is illustrated by way of example in FIGS. 3 and 6. Further, due to the problems that could be generated by the heat produced by the unit 14 during its operation, the aeration grooves 23 are formed in the access opening 30 of the housing 2 and the housing. in other parts of the column, but it is also possible to create them in the walls of the box chamber 2 of the light tower with a fixed crown, for adequate air circulation and climate control of the box chamber 2.

As shown, the antenna system 15 is rigid, i.e. cannot be lowered for maintenance, as a support crown for wide-angle headlamps.

This choice is dictated by the fact that the antenna system needs maintenance very rarely, and if intervention was necessary, conventional lifting devices such as ladders or lifting platforms would be used to reach them.

Naturally, the invention can be varied and modified in many different ways without departing from the scope of the invention.

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PATENT CLAIMS

Claims (14)

PATENT CLAIMS A light tower with a base radio station for mobile telephony, comprising a pole (1) provided with a box chamber (2) in the lower part, accessible by an opening (30) for the passage of the operator's hand or torso and topped with a head (4) (5) and provided with lighting bodies (7) to which energy is supplied by cables extending inside the column (1) and supported by a support crown (8) surrounding the column (1) and movable by means of a lifting system arranged in the cabinet ( 2), characterized in that it comprises a transmission and supply unit (14) for power supply, located in the box chamber (2) of the pole (1) and an antenna system (15) mounted on the pole (1) in the top part under the head (2). 4), wherein the transmission and power unit (14) is connected to the antenna system (15) by means of data transmission cables (16) located inside the column (1). Light tower according to claim 1, characterized in that the antenna system (15) comprises at least one antenna, attached by means of brackets (17) to a pair of annular plates (18), for securing to the pole (1), Light tower according to claim 2, characterized in that the inclination of the brackets (17) is adjustable. Light tower according to claim 1, characterized in that the antenna system (15) is secured in position by means of at least one steel cable (19) passing through the interior of the mast (1) and anchored to the mast (1) in the box chamber (2). ). Light tower according to claim 1, characterized in that the antenna system (15) is covered around the perimeter of the pole (1) by a protective sheath (20) made of a material which is permeable to electromagnetic radiation and detachably connected to the pole (1). ) by means of at least one planar plate (21). • 4 • 4 • β Light tower according to claim 5, characterized in that the protective sheath (20) is formed from a single housing. Light tower according to claim 5, characterized in that the protective housing (20) is formed by at least two housing parts. -, · Light tower according to claim 5, characterized in that the protective sheath (20) has a cylindrical shape. Light tower according to claim 5, characterized in that the protective sheath has a prismatic shape. The light tower according to claim 5, characterized in that the protective sheath (20) is preferably removably attached to a drive head (11) which is integral with the column (1) inside the dome (5). Light tower according to claim 5, characterized in that the protective sheath (20) is made of glass fiber reinforced plastic. Light tower according to claim 5, characterized in that the outer diameter (d) of the protective sheath (20) is smaller than the inner diameter (D) of the supporting crown (8) surrounding the column (19) supporting the lighting bodies (7) and movable coaxially along the column (1) by means of cables (44) by means of a system for raising and lowering the support crown (8), which is arranged in the box chamber (2). Light tower according to claim 1, characterized in that the box chamber (2) in which the transmission and supply unit (14) is arranged is formed by an enlargement (22) of the lower part of the column (1). Light tower according to claim 1, characterized in that the box chamber (2) in which the transmission and supply unit (14) is arranged is provided with at least one ventilation opening for the climate control system of the box chamber (2).