JP2001211012A - Equipment and method for antenna installation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an equipment of simple structure for installing an antenna vertically to the ground even onto any inclined constructions including a steel tower and its method. SOLUTION: This antenna installation equipment consists of antenna support arms 20 with one end fixed on a construction 100 and the other end bent in the almost L-shape holding an antenna 10, support arm fixing hardware 30 to fix the antenna support arms 20 allowing them to rotate or move around the construction 100, and antenna fixing hardware 40 to fix the antenna 10 allowing it to rotate or move around the construction 100. In this equipment, the antenna support arms 20 can be horizontally installed to the ground by means of the antenna anchor parts and the antenna 10 can be vertically installed to the ground by means of the antenna fixing hardware 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna mounting apparatus and an antenna mounting method for mounting an antenna perpendicularly to the ground on an inclined building such as a steel tower.

[0002]

2. Description of the Related Art In recent years, with the implementation of emergency radio broadcasts in local governments and the like, antennas capable of receiving emergency radio broadcasts in all areas of the local government have been installed in various places in local governments. Along with this, antennas have been installed even on inclined structures such as steel towers. Normally, this type of emergency radio broadcasting is in the FM broadcasting band having a frequency of 76 to 90 MHz, and therefore, a vertically polarized two-stage stacked antenna having a horizontally polarized omnidirectional is used. For this reason, this type of antenna must be mounted perpendicular to the ground.

[0003]

However, since this type of antenna is not considered to be installed on an inclined building such as a steel tower, it is difficult to install the antenna on an inclined building such as a steel tower. However, the antenna cannot be mounted perpendicularly to the ground, causing a problem that the receiving sensitivity is reduced. Therefore, special fittings were specially manufactured to fit sloping buildings such as steel towers, and antennas were installed using these fittings, so this type of mounting equipment became expensive and the mounting method was The problem was complicated and troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and has a simple structure in which an antenna can be mounted perpendicularly to the ground even on an inclined structure such as a steel tower. And an object of the present invention is to provide a mounting method using the mounting device.

[0005]

Means for Solving the Problems and Their Functions and Effects In order to solve the above problems, an antenna mounting device of the present invention comprises:
An antenna support arm having a fixing portion fixed to the building at one end, and having an antenna fixing portion for fixing the antenna at the other end bent in a substantially L shape, and a fixing portion of the antenna supporting arm capable of rotating; A support arm mounting bracket that is temporarily fixed after being movably fixed, and an antenna bracket that is temporarily fixed after being movably temporarily fixed to the antenna fixing portion of the antenna support arm, and has an antenna fixed portion. The antenna support arm is mounted and fixed horizontally to the ground, and the antenna mounted on the antenna fixing bracket is mounted and fixed vertically to the ground.

When an antenna support arm having an antenna fixing portion bent in a substantially L-shape is mounted and fixed horizontally to the ground, the antenna fixing metal can be mounted vertically to the ground, and the antenna fixing metal can be mounted. It is possible to mount the antenna attached to the vertical to the ground. Then, the antenna can be vertically mounted on the ground simply by using the antenna support arm having the antenna fixing portion bent in a substantially L shape, the support arm mounting bracket, and the antenna fixing bracket. The structure of the mounting device is simple, and the mounting work is also easy.

In this case, if the antenna support arm is provided at at least two places and the antenna is fixed at two or more places to the antenna fixing bracket attached to the antenna support arm, even a large antenna is firmly attached. It becomes possible.

In the method of mounting an antenna according to the present invention, a step of fixing an antenna support arm mounting bracket to an inclined building, and one end of a substantially L-shaped antenna support arm can be rotated by the antenna support arm mounting bracket. And a step of temporarily fixing the antenna supporting arm to the other end of the antenna supporting arm so as to be rotatable and movable, and a step of temporarily fixing the other end of the substantially L-shaped antenna supporting arm to the ground. The method includes a step of fixing the antenna horizontally, a step of attaching the antenna to the antenna fixture vertically to the ground, and a step of fixing the temporarily fixed antenna support arm to the support arm fixture.

Thus, the antenna can be vertically mounted on the ground only by using the antenna support arm having the antenna fixing portion bent in a substantially L shape, the support arm mounting bracket, and the antenna fixing bracket. Therefore, the mounting operation of this type of mounting device becomes easy.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the antenna mounting device of the present invention will be described below with reference to FIGS. In addition,
FIG. 1 is a front view showing a state in which an antenna is mounted on a steel tower perpendicular to the ground using the antenna mounting device of the present invention. FIG. 2 is an enlarged view of part A of FIG. FIG.
FIG. 3A is a diagram showing an antenna attached to an arm, FIG. 3A is a front view, and FIG. 3B is a side view.
FIG. 4 is a diagram showing an antenna mounting device of the present invention.
(A) is a front view and FIG. 4 (b) is a side view.

The antenna mounting device of the present embodiment is a steel tower 10
The antenna 10 can be mounted vertically on the ground with respect to the ground 110, and one end is fixed to the inclined support 110 of the steel tower 100,
A substantially L-shaped antenna support arm 20 for fixing the antenna 10 at the other end, and the antenna support arm 20
Support arm mounting bracket 30 that is rotatably and movably fixed to a column 110 having an inclination, and an antenna support arm 2
0 is provided with an antenna fixing bracket 40 for fixing the antenna 10 rotatably and movably.

As shown in FIG. 3, the antenna 10 includes an element bracket 11 made of stainless steel,
The matching unit 13 includes a matching unit 13, a distributor 14, a radiating element 15, and an antenna arm 16 made of stainless steel.

As shown in FIG. 4, the antenna support arm 20 is made of an iron pipe having a surface coated with hot-dip galvanized steel, and is connected to the support arm 21 and has a substantially L-shaped tip. And an arm 22 made of an iron pipe whose surface is hot-dip galvanized. And one end of the support arm 21 is
And the other end of the support arm 21 is connected to the arm 22 via a flange portion 21a. One end of the arm 22 is connected to the flange 2.
2a is connected to the other end of the support arm 21 via
The other end of the arm 22 serves as a fixed part of the antenna 10.

Here, in this embodiment, the diameter of the support arm 21 is set to be equal to that of the arm 22 so that the required strength can be obtained even if the antenna support arm 20 is affected by wind speed or the like.
And a flange portion 21a and a flange portion 22a are formed at the connecting portion thereof, and the flange portion 21a formed at the support arm 21 and the flange portion 22a formed at the arm 22 are bolted together. The connecting portion 23 is formed by connecting the connecting portion 21b and the nut 22b. When the antenna 10 is installed in a place where the strength is not required without being affected by the wind speed or the like,
The antenna support arm 20 in which the support arm 21 and the arm 22 are integrally formed may be used.

As shown in FIG. 4, the support arm mounting bracket 30 includes a mounting plate 31, a holding plate 32 for fixing the support arm 21 to the mounting plate 31, and a deformed U-bolt for fixing the mounting plate 31 to the support column 110. 33 and a nut 34, and a bolt 35 and a nut 36 for fixing the holding plate 32 to the mounting plate 31.

As shown in FIG. 4, the antenna fixing bracket 40 includes an antenna mounting plate 41, a U-shaped bolt 42 and a nut 43 for fixing the antenna mounting plate 41 to the arm 22.
And a U-shaped bolt 44 and a nut 45 for fixing the antenna 10 to the antenna mounting plate 41.

Next, a description will be given of a method of mounting the antenna mounting apparatus having the above-described configuration on the inclined column 110 of the steel tower 100 so as to mount the antenna 10 vertically to the ground. First, the flange portion 21a formed on the support arm 21 and the flange portion 22a formed on the arm 22 are connected by a bolt 21b and a nut 22b to form a connection portion 2
3 to form a substantially L-shaped antenna support arm 20.

Then, after fixing the mounting plate 31 to the support column 110 using the modified U-shaped bolt 33 and the nut 34,
The antenna support arm 20 is temporarily fixed to the mounting plate 31 using the holding plate 32, the bolt 35 and the nut 36. Next, the arm 22 is rotated so that the arm 22 is adjusted to be horizontal (parallel) to the ground. Thereafter, the antenna mounting plate 41 is temporarily fixed to the distal end of the arm 22 of the antenna support arm 20 using the U-shaped bolt 42 and the nut 43, and then the arm 16 of the antenna 10 is fixed using the U-shaped bolt 44 and the nut 45. It is fixed to the antenna mounting plate 41.

When the arm 16 of the antenna 10 is fixed to the antenna mounting plate 41, the arm 22 is rotated to adjust the arm 16 to be perpendicular to the ground, and the antenna mounting plate 41 is fixed to the ground. The arm 16 is fixed to the antenna mounting plate 41 when it is perpendicular to the arm. As a result, the antenna 10 is temporarily fixed to the uppermost antenna support arm 20.

Next, the antenna 10 is temporarily fixed to the antenna support arm 20 at the middle stage in the same manner as described above.
After the antenna 10 is temporarily fixed to the lowermost antenna supporting arm 20, the supporting arm 2 of each antenna supporting arm 20 is fixed.
1 and pull out the support arm 21 so that the antenna 10 fixed to the lowermost support arm 21 is separated from the support 110 by at least 1 m or more in order to eliminate the influence of the reflected wave of the incoming radio wave from the tower 100. When the antenna 10 is perpendicular to the ground, the support arms 21, 21, 21 are firmly fixed to the mounting plates 31. As a result, the antenna 10 is firmly fixed to the column 110 and vertically fixed to the ground.

As described above, when the arm 22 of the antenna support arm 20, which is formed into a substantially L-shape and includes the support arm 21 and the arm 22, is mounted horizontally with respect to the ground, the mounting plate 41 of the antenna fixing bracket 40 is mounted. The antenna 10 can be attached vertically to the ground, and is attached to the attachment plate 41 of the antenna fixing bracket 40.
Can be mounted perpendicular to the ground. Then, the antenna 10 can be vertically mounted on the ground only by using the antenna support arm 20, the support arm mounting bracket 30, and the antenna fixing bracket 40, so that the configuration of this type of mounting device is simple. At the same time, the mounting work becomes easy.

Note that, in the above-described embodiment, approximately L
The example in which the U-shaped antenna support arm 20 is composed of two members, the support arm 21 and the arm 22, has been described.
The same effect can be obtained even if one iron pipe is bent into a substantially L-shape to form the antenna support arm 20. Also, an example in which the antenna support arm 20 is attached to three places has been described.
The number of attachment points may be any number as long as it is one or more. In short, the antenna 10 is attached to the support 11 so as to have a predetermined strength.
It suffices if it can be fixed to 0.

Further, in the above-described embodiment, the example in which the substantially L-shaped antenna support arm 20 is fixed to the steel tower 100 has been described. However, the antenna mounting device of the present invention is applied to not only the steel tower but also the inclined building. It is particularly effective. In this case, a structure may be employed in which the support arm mounting brackets can be mounted on a building to be fixed.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which an antenna is mounted on a steel tower vertically to the ground using the antenna mounting device of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG. 1;

3A and 3B are diagrams showing an antenna attached to an arm, FIG. 3A is a front view, and FIG. 3B is a side view.

FIG. 4 is a view showing an antenna mounting device of the present invention;
FIG. 4A is a front view, and FIG. 4B is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Antenna 11 ... Element bracket 12 ... Feeding part 13 ... Matching device 14 ... Distributor 15 ... Radiating element 16 ... Antenna arm 20 ... Antenna support arm 21 ... Support arm 21a ... Flange part 22 ... Arm 22a ... Flange part 30 ... Support Arm mounting bracket 31 ... Mounting plate 32 ... Holding plate 33 ... Modified U-shaped bolt 34 ... Nut 35 ... Bolt 36 ... Nut 40 ... Antenna fixing bracket 41 ... Antenna mounting plate 42 ... U-shaped bolt 43 ... Nut 44 ... U-shaped bolt 45 ... Nuts 100 ... Tower 110 ... Prop

Claims (4)

[Claims] 1. An antenna mounting device capable of mounting an antenna on a sloped building perpendicular to the ground, comprising a fixing portion fixed to the building at one end, and having a substantially L-shape. An antenna support arm having an antenna fixing portion for fixing the antenna at the other end bent, a support arm mounting bracket for temporarily fixing the fixing portion of the antenna support arm rotatably and movably, and then fixing the antenna; An antenna fixing bracket for temporarily fixing the antenna to the antenna fixing portion of the support arm so as to be rotatable and movable, and then fixing the antenna. The antenna support arm having the antenna fixing portion is horizontally fixed to the ground and fixed. Wherein the antenna attached to the antenna fixing bracket is vertically attached to the ground and fixed. That the antenna of the attachment device. 2. The apparatus according to claim 1, wherein said antenna support arm has at least two
2. The antenna mounting device according to claim 1, wherein the antenna is fixed to the antenna fixing bracket attached to the antenna fixing portion of the antenna support arm at two or more positions. 3. 3. An antenna mounting method for mounting an antenna on a tilted building perpendicular to the ground, comprising: fixing an antenna support arm mounting bracket to the tilted building; Temporarily fixing one end of a substantially L-shaped antenna support arm to the bracket so as to be rotatable and movable; and temporarily fixing the antenna fixing bracket to the other end of the antenna support arm so as to be rotatable and movable. Fixing the other end of the substantially L-shaped antenna support arm horizontally to the ground; mounting the antenna to the antenna fixing bracket vertically to the ground; Fixing the arm to the support arm mounting bracket. 4. The apparatus according to claim 1, wherein said antenna support arm has at least two
The antenna mounting method according to claim 3, wherein the antenna is fixed to the antenna fixing bracket attached to the antenna support arm at two or more locations.