JP2001036313A - Antenna mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna mounting device that a wide angle adjustment range and moreover an adjustment mechanism which can be made small and simplified. SOLUTION: Tapers 27, 28 are formed on both ends of a pipe 26 of a device main body 21 and an arm 31 to support an antenna is inserted into the inside of the pipe 26. A frame 32 of truncated-cone shape is welded and fitted to the taper 27 of the pipe 26 on the way of the arm 31. A female screw 33 is provided on the tip of the arm 31, and a bolt 34 is screwed into the female screw 33 via a truncated cone washer member 37. One face of the truncated cone washer member 37 abuts on the tip of the pipe 26, and a conical projection is inserted between the pipe 26 and the arm 31. Loosening the bolt 34 allows the arm 31 to be turned and tightening the bolt 34 brings the frame 32 and the truncated cone washer member 37 into press contact with the tapers 27, 28 of the pipe 26 to fix them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna mounting device provided with a direction adjusting mechanism for a small directional antenna such as a parabolic antenna.

[0002]

2. Description of the Related Art A conventional parabolic antenna mounting device has an elevation angle adjusting mechanism as shown in FIGS.
FIG. 9 is a plan view of the parabolic antenna mounting device, and FIG. 10 is a side view of the same. 9 and 10, reference numeral 1 denotes a fixing bracket formed by bending a plate material into a U-shape, and 2 denotes a slide bracket formed by similarly bending a plate material into a U-shape. Then, the fixing bracket 1
A fulcrum bolt 3 is provided at a position serving as a fulcrum on both the left and right sides of the slide fitting 2, and a fixing bolt 5 for sliding the inside of the elongated hole 4 and fixing the two at a predetermined position is provided. The fixing bracket 1 is attached to a mounting column 6 with a screw 7, and the slide fitting 2 is fixed to a mounting base 9 of a parabolic antenna 8. The mounting base 9 is provided with a support arm 11 bent so that the tip is located on the front side of the parabolic antenna 8, and the primary radiator 12 is attached to the tip.

In the above configuration, the parabolic antenna 8
When adjusting the elevation angle of, the fixing bolt 5 is loosened, and the slide fitting 2 is slid together with the parabolic antenna 8.
The fixing bolt 5 moves in the elongated hole 4 as the slide fitting 2 slides. Then, after rotating the parabolic antenna 8 to a target position, the fixing bolt 5 is tightened to fix the fixing fitting 1 and the slide fitting 2.

[0004]

The antenna mounting device having the above-described structure is provided with an elongated hole 4 provided in the slide fitting 2.
The elevation angle adjustment range is regulated by, for example, 60 °
When a large adjustment range is required, the total length of the elongated hole 4 provided in the slide fitting 2 becomes large, and as a result, the shapes of the fixing fitting 1 and the slide fitting 2 also become large. Further, fulcrum bolts 3 are provided on both sides of the fixing bracket 1 and the slide bracket 2, respectively.
In addition, since the fixing bolt 5 is provided, a total of four bolts are required, and it is necessary to tighten the four bolts after the completion of the angle adjustment, which makes the operation extremely complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object to provide an antenna mounting apparatus which has a large angle adjustment range and can reduce the size and simplification of an adjustment mechanism.

[0006]

According to a first aspect of the present invention, there is provided an antenna mounting apparatus comprising: a pipe fixed to a mounting bracket in a horizontal direction; a tapered portion formed at both ends of the pipe;
An arm for supporting the antenna inserted into the pipe,
A piece which is fixed in the middle of the arm and is attached to one end of the pipe and has an outer peripheral surface formed in a tapered shape, a female screw part provided inside the tip end of the arm inserted into the pipe, A washer member arranged at the other end of the pipe and having an outer peripheral surface formed in a tapered shape, a bolt screwed to the female screw portion at the tip of the arm through the washer member, and Means for moving the piece together with the arm in the bolt direction, and pressing the outer peripheral surfaces of the piece and the washer member against the tapered portion of the pipe to fix the position of the arm, and adjusting the elevation angle of the antenna by the rotational position of the arm It is characterized by doing.

According to a second aspect of the present invention, there is provided an antenna mounting apparatus comprising: a pipe fixed to a support member in a horizontal direction; a tapered portion formed inside both ends of the pipe; and a female screw formed on a central axis of the pipe. And a washer member disposed on each of the tapered portions of the pipe and having an outer peripheral surface formed in a tapered shape, and an antenna support plate fixed to the washer member,
At both ends of the pipe, bolts screwed to female threads provided on the center axis of the pipe with the washer members interposed therebetween, and the outer peripheral surfaces of the washer members are tightened by tightening the bolts. Means for fixing the position of the antenna support plate together with the washer member by pressing against the tapered portion, wherein the elevation angle of the antenna is adjusted by the rotational position of the antenna support plate.

An antenna mounting device according to a third aspect of the present invention is arranged such that a pipe fixed horizontally to a support member, a tapered portion formed inside both ends of the pipe, and one tapered portion of the pipe. A first washer member provided with an insertion hole in the center shaft and having an outer peripheral surface formed in a tapered shape, and a first threaded member arranged in the other tapered portion of the pipe, a female screw portion formed in the center shaft, and an outer peripheral surface formed in the center shaft. A tapered second washer member, an antenna support plate fixed to the first and second washer members and having an outer peripheral surface formed in a tapered shape, and an insertion hole of the first washer member. The threaded part inserted into the pipe and formed at the tip is
And a bolt screwed into a female screw portion formed on the washer member. The outer peripheral surfaces of the first and second washer members are pressed against the tapered portion of the pipe by tightening the bolt, and together with the washer member, the antenna support plate is formed. Means for fixing the position, wherein the elevation angle of the antenna is adjusted by the rotational position of the antenna support plate.

According to a fourth aspect of the present invention, there is provided an antenna mounting apparatus comprising: a pipe fixed to a mounting bracket in a vertical direction; a tapered portion formed inside the upper and lower ends of the pipe; and an antenna support inserted into the pipe. Arm, which is fixed in the middle of the arm and is attached to one end of the pipe and has a tapered outer peripheral surface, and is provided inside the distal end of the arm inserted into the pipe. A female screw portion, a washer member disposed at the other end of the pipe and having an outer peripheral surface formed in a tapered shape, a bolt screwed to the female screw portion at the tip of the arm with the washer member interposed therebetween, Means for moving the piece in the bolt direction together with the arm by tightening the bolt, and pressing the outer peripheral surfaces of the piece and the washer member against the tapered portion of the pipe to fix the position of the arm; The rotational position of the serial arm and adjusting the antenna azimuth.

An antenna mounting device according to a fifth aspect of the present invention is a pipe fixed vertically to a mounting bracket, a tapered portion formed inside the upper and lower ends of the pipe, and inserted into the pipe from above. An arm for adjusting the antenna azimuth angle, a piece fixed to the middle of this arm and attached to the upper end of the pipe, and having a tapered outer peripheral surface and a tip inside the arm inserted into the pipe. A female screw portion provided, a washer member disposed at a lower end portion of the pipe and having an outer peripheral surface formed in a tapered shape, a bolt screwed to the female screw portion at the lower end of the arm with the washer member interposed therebetween, Means for moving the piece in the bolt direction together with the arm by tightening the bolt, and pressing the outer peripheral surfaces of the piece and the washer member against the tapered portion of the pipe to fix the position of the arm; Is attached to the over-time, characterized by comprising a elevation angle adjusting mechanism for adjusting the elevation angle of the antenna.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a plan view of an antenna mounting device showing an example in which the present invention is applied to the elevation angle adjustment of a parabolic antenna, FIG. 2 is a side view thereof, and FIG. 3 is an enlarged view of the elevation angle adjustment mechanism in FIG. FIG.

1 to 3, reference numeral 21 denotes an apparatus main body.
The mounting bracket 22 is mounted on the mounting column 25 by the V bolt 23 and the nut 24. The pipe 2 is attached to the mounting bracket 22 so as to be orthogonal to the mounting column 25, that is, in the horizontal direction.
6 is fixed by welding or the like.

The pipe 26 has tapered portions 27 and 28 formed by tapering the inner surfaces of both ends. An arm 31 that supports a parabolic antenna 29 is inserted inside the pipe 26. A metal piece 32 is welded to the arm 31 in the middle thereof, and this piece 32 is fitted to the tapered portion 27 on one (insertion side) of the pipe 26.
The piece 32 is formed into a tapered shape, for example, a truncated cone, so that the outer peripheral surface thereof is adapted to the tapered portion 27.

At the tip of the arm 31, a female screw portion 33 is integrally provided inside. Then, a bolt 34 is attached to the female screw portion 33 by a spring washer 35,
It is screwed together via a plain washer 36 and a truncated conical washer member 37 made of metal. This truncated cone washer member 37
Is formed in a tapered shape, for example, a truncated cone so that the outer peripheral surface conforms to the tapered portion 28 of the pipe 26. The disc-shaped substrate abuts on the tip of the pipe 26, and the conical projection is 31. In this case, the tip of the arm 31 is set to be slightly shorter than the end of the pipe 26 so that a gap is formed between the tip of the arm 31 and the truncated cone washer member 37, or the center of the truncated cone washer member 37, That is, the portion facing the end of the arm 31 is formed thin.

As shown in FIG. 2, the pipe 26 has an angle display nameplate 3 on an end peripheral surface on which a piece 32 is mounted.
8 is mounted, and an elevation reading mark 39 is provided on the outer peripheral edge of the base of the piece 32 corresponding to the angle display nameplate 38.
The parabolic antenna 29 is attached to the arm 31 via an antenna support plate 40. The parabolic antenna 29 is provided with a primary radiator 42 via a support arm 41.

Next, the operation for adjusting the elevation angle of the parabolic antenna 29 will be described. First, bolt 3
With the 4 loosened, the parabolic antenna 29 is rotated by hand as shown in FIG. 2 to roughly determine the elevation angle, and then the bolt 34 is slightly tightened. As a result, a weak frictional force is generated between the tapered portion 27 and the piece 32 of the pipe 26 and between the tapered portion 28 and the truncated conical washer member 37, and does not rotate due to the weight of the parabolic antenna 29. It becomes a state of rotation by adding. In this state, the parabolic antenna 29 is rotated little by little to finely adjust the elevation angle. After the elevation angle position of the parabolic antenna 29 is finally determined, the work is completed by fully tightening the bolt 34 with the specified torque. That is, when the bolt 34 is tightened, the pipe 26 is pressed against the tapered portion 27 and the piece 32 and between the tapered portion 28 and the truncated conical washer member 37 to generate a strong weak frictional force, and the pipe 26 is fixed. Is done.

According to the first embodiment, since the arm 31 for supporting the antenna is mounted in the pipe 26 via the bridge 32 and the truncated cone washer member 37, the arm 31 can be rotated 360 °. . Therefore, the angle adjustment range of the parabolic antenna 29 is not limited, and can be adjusted to an arbitrary angle position. In addition, the adjustment mechanism can be simplified and downsized, and after adjusting the elevation angle of the parabolic antenna 29, the position can be fixed only by tightening one bolt.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. The first embodiment shows the case where the elevation angle of the parabolic antenna is adjusted, but the second embodiment shows an example where the elevation angle and the azimuth angle of the parabolic antenna are adjusted. FIG. 4 is a plan view of an antenna mounting apparatus according to a second embodiment of the present invention, FIG. 5 is an enlarged detail view showing an elevation adjustment mechanism, FIG. 6 is a side view of FIG.
FIG. 3 is an enlarged detail view showing an azimuth adjusting mechanism.

4 to 7, the antenna support plate 40 is attached to an elevation adjustment mechanism 51, and the elevation adjustment mechanism 51 is attached to an azimuth adjustment arm 53 of an azimuth adjustment mechanism 52.
Attached to The azimuth adjustment mechanism 52 includes a support plate 5
4 and is attached to a fixing member 55 such as a support or a wall surface.

The elevation angle adjusting mechanism 51 is constructed based on the same principle as that of FIG. 3 in the first embodiment. In this example, tapered portions 56a and 56b are formed at both ends of the pipe 26, and the tapered portions 56a are formed. , 56b are provided with truncated cone washer members 37a, 37b. The antenna support plate 40 is fixed to the truncated cone washer members 37a and 37b by welding or the like. The antenna support plate 40 is formed with through holes for inserting the bolts 34a and 34b from both sides thereof. The pipe 26 is formed with a female screw 50 that is screwed to the threaded portions of the bolts 34a and 34b along the central axis.

Then, bolts 34 a and 34 b are inserted through insertion holes formed on both sides of the antenna support plate 40, and screwed into a female screw 50 provided on the central axis of the pipe 26.

The elevation angle adjusting mechanism 51 constructed as described above.
Are bolts 34a, 34b as in the first embodiment.
When the antenna support plate 40 is loosened, the truncated cone washer member 3
7a, 37b can be rotated together with the bolt 34
When the antenna support plate 40 is tightened, the antenna support plate 40 can be fixed. Thereby, the elevation angle of the parabolic antenna 29 can be easily adjusted in a wide angle range.

The pipe 2 of the elevation angle adjusting mechanism 51
6, the tip of the azimuth adjustment arm 53 is welded in a T-shape to the lower central part.

The azimuth adjustment mechanism 52 has the same configuration as the elevation adjustment mechanism shown in the first embodiment, and an azimuth adjustment arm 53 is inserted into a pipe 61. The above pipe 61
The upper and lower tapered portions 62 and 63 are formed by tapering the inner surfaces of both ends. The above pipe 61
A metal piece 64 is welded to the azimuth adjusting arm 53 inserted in the pipe, and this piece 64 is attached to the pipe 6.
One upper tapered portion 62 is fitted. The piece 64 is formed into a truncated cone so that its outer peripheral surface fits the upper tapered portion 62.

At the lower end of the arm 53, a female screw portion 65 is integrally provided inside. A bolt 66 is screwed to the female screw portion 65 via a spring washer 67, a plain washer 68, and a truncated cone washer member 69. The truncated cone washer member 69 is formed in a truncated cone of metal so as to fit the lower tapered portion 63 of the pipe 61, and the upper periphery of the disc-shaped substrate abuts on the lower end of the pipe 61, and the conical protrusion is formed. It is inserted between the pipe 61 and the azimuth adjusting arm 53. In this case, the azimuth adjusting arm 53 is formed to be slightly shorter than the pipe 61 or a central portion of the truncated conical washer member 69 so that a gap is formed between the tip of the azimuth adjusting arm 53 and the truncated cone washer member 69. That is, a portion facing the tip of the azimuth adjusting arm 53 is formed thin.

An angle display nameplate 71 is mounted on the upper end of the pipe 61, and an elevation angle reading mark 72 is provided on the outer peripheral edge of the base of the piece 64 corresponding to the angle display nameplate 71. A support plate 54 is provided on the side of the pipe 61.
Are fixed by welding or the like.
Fixed to 5.

Azimuth adjustment mechanism 52 constructed as described above
Since the azimuth adjustment arm 53 can be rotated with the bolt 66 loosened and slightly tightened, the azimuth of the parabolic antenna 29 can be arbitrarily and easily adjusted. After the adjustment, the bolt 66 is fully tightened to fix the azimuth adjustment arm 53. That is, when the bolt 66 is tightened, a strong weak frictional force is generated between the upper tapered portion 62 and the piece 64 and between the lower tapered portion 63 and the truncated cone washer member 69, and a strong weak frictional force is generated. Is fixed. The fixing member 55
When a support column is used, the azimuth can be adjusted within a range of 360 °.

In the second embodiment, a case is shown in which the elevation angle adjustment mechanism 51 shown in detail in FIG. 5 and the azimuth angle adjustment mechanism 52 shown in FIG. 7 are combined. Of course, it may be constituted.

(Third Embodiment) Next, a third embodiment of the present invention will be described. In the second embodiment, the case where the antenna support plate 40 and the truncated cone washer members 37a and 37b in the elevation angle adjusting mechanism 51 are fixed with two bolts 34a and 34b is shown. 40 and truncated cone washer members 37a, 37b
Is fixed with a single bolt 34.

FIG. 8 is a plan view showing only an elevation angle adjusting mechanism 51 in the third embodiment. FIG.
As shown in FIG.
b are formed, and truncated cone washer members 37a and 37b are interposed between the tapered portions 56a and 56b. The antenna support plate 40 is fixed to the truncated cone washer members 37a and 37b by welding or the like. The one truncated cone washer member 37a has an insertion hole through which the bolt 34 is inserted in the center axis, and the other truncated cone washer member 37b is screwed into the screw portion 57 of the bolt 34 in the center axis. A female screw 58 is formed. In this case, a female screw may be formed in the antenna support plate 40 at a portion where the bolt 34 is inserted.

On the other hand, the bolt 34 is longer than the length of the pipe 26, and has the screw portion 57 formed on the tip end side. The bolt 34 is provided with a truncated cone washer member 37a.
From the side, the antenna support plate 40 and the truncated cone washer member 37
a into the pipe 26 through the insertion hole a and screwed into the female screw 58 of the truncated cone washer member 37b provided on the opposite side.

In the above configuration, when the bolt 34 is tightened, the bolt 34 and the female screw 58 of the frusto-conical washer member 37b are screwed to form a frusto-conical washer member 37a, 3a.
7b is pressed against the tapered portions 56a, 56b, and the antenna support plate 40 is fixed by the frictional force between them. When the bolt 34 is loosened and lightly tightened, the antenna support plate 40 can be rotated together with the truncated cone washer members 37a and 37b.

Therefore, the elevation angle of the parabolic antenna 29 can be easily adjusted by loosening or tightening one bolt 34.

In the above embodiments, the case where the elevation angle or the azimuth angle of the parabolic antenna 29 is adjusted has been described. However, the present invention can be similarly applied to other small directional antennas.

In each of the above embodiments, the pieces 32, 64
Although the case where the washer members 37, 37a, 37b, and 69 are formed in the shape of a truncated cone is shown, even with other shapes, the portion to be fixed by the frictional force after adjusting the elevation angle and the azimuth angle is tapered. What is necessary is just to be formed.

[0036]

As described above in detail, according to the present invention, as an elevation angle adjusting mechanism for an antenna, an arm for supporting an antenna is inserted into a pipe, and tapered portions are formed inside both ends of the pipe. The arm is held with a piece and a washer having an outer peripheral surface formed in a tapered shape interposed in the tapered portion, and a bolt is screwed into a threaded portion of the arm end via the washer, and the bolt is tightened. Since the arm is fixed by pressing the outer peripheral surfaces of the piece and the washer against the tapered portion of the pipe, the arm can be rotated by 360 °. Therefore, the angle adjustment range of the antenna is not limited, and can be adjusted to an arbitrary angle position. Further, the adjustment mechanism can be simplified and downsized, and after adjusting the elevation angle of the antenna, the position can be fixed only by tightening one bolt. Further, the present invention includes the elevation angle adjustment mechanism and the azimuth angle adjustment mechanism having the same configuration as the elevation angle adjustment mechanism, so that the elevation angle and the azimuth angle of the antenna can be easily adjusted in a wide angle range.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of an antenna mounting device according to a first embodiment of the present invention.

FIG. 2 is a side view of the antenna mounting device according to the embodiment.

FIG. 3 is an enlarged detail view showing an elevation angle adjustment mechanism in the embodiment.

FIG. 4 is a plan view showing a configuration of an antenna mounting device according to a second embodiment of the present invention.

FIG. 5 is an enlarged detail view showing an elevation angle adjustment mechanism in the embodiment.

FIG. 6 is a side view of the antenna mounting device in the embodiment.

FIG. 7 is an enlarged detail view showing an azimuth adjusting mechanism in the embodiment;

FIG. 8 is a detailed view showing an elevation adjustment mechanism of an antenna mounting device according to a third embodiment of the present invention.

FIG. 9 is a plan view of a conventional antenna mounting device.

FIG. 10 is a side view of a conventional antenna mounting device.

[Explanation of symbols]

 26 pipe 27, 28 taper portion 29 parabolic antenna 31 arm 32 piece 34 bolt 34a, 34b bolt 35 spring washer 36 plain washer 37, 37a, 37b truncated cone washer member 38 angle display nameplate 39 elevation reading mark 40 antenna support plate 41 support arm 42 Secondary radiator 50 Female screw 51 Elevation angle adjustment mechanism 52 Azimuth angle adjustment mechanism 53 Azimuth angle adjustment arm 54 Support plate 55 Fixing member 56a, 56b Tapered portion 61 Pipe 62 Upper tapered portion 63 Lower tapered portion 64 Piece 66 Bolt 67 Spring washer 68 Plain Washer 69 truncated cone washer member 71 angle display nameplate 72 elevation reading mark

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5J020 AA03 BA09 BA19 BC06 CA02 5J021 AA01 AB07 BA01 DA02 DA03 DA04 DA05 DA06 EA03 GA02 HA05 HA07 5J047 AA01 AA07 AA09 AA10 AA19 AB19 BA02 BA08 BA09 BB05 BB10 BB17 BF10 BG10

Claims (5)

[Claims] 1. A pipe fixed to a mounting bracket in a horizontal direction, a tapered portion formed inside both ends of the pipe,
An arm for supporting the antenna inserted into the pipe,
A piece which is fixed in the middle of the arm and is attached to one end of the pipe and has an outer peripheral surface formed in a tapered shape, a female screw part provided inside the tip end of the arm inserted into the pipe, A washer member arranged at the other end of the pipe and having an outer peripheral surface formed in a tapered shape, a bolt screwed to the female screw portion at the tip of the arm through the washer member, and Means for moving the piece together with the arm in the bolt direction, and pressing the outer peripheral surfaces of the piece and the washer member against the tapered portion of the pipe to fix the position of the arm, and adjusting the elevation angle of the antenna by the rotational position of the arm An antenna mounting device, comprising: 2. A pipe fixed to a support member in a horizontal direction, and a tapered portion formed inside both ends of the pipe.
A female screw portion formed on a central axis of the pipe, a washer member disposed on each tapered portion of the pipe, and having an outer peripheral surface formed in a tapered shape; an antenna support plate fixed to the washer member; At both ends of the pipe, a bolt screwed to a female screw portion provided on the center axis of the pipe with the washer member interposed therebetween, and by tightening the bolt, the outer peripheral surface of the washer member is tapered to the pipe. Means for fixing the position of the antenna support plate together with the washer member by pressing the antenna support plate, and adjusting the elevation angle of the antenna by the rotational position of the antenna support plate. 3. A pipe fixed to a support member in a horizontal direction, a taper formed inside both ends of the pipe,
A first washer member, which is disposed in one of the tapered portions of the pipe, has an insertion hole formed in the central axis, and has an outer peripheral surface formed in a tapered shape, and is disposed in the other tapered portion of the pipe, and has a central axis. A second washer member having a female thread portion and an outer peripheral surface formed in a tapered shape;
And an antenna support plate fixed to the second washer member and having an outer peripheral surface formed in a tapered shape, and a screw portion inserted into the pipe through the insertion hole of the first washer member and formed at the tip thereof with the third portion. A bolt screwed into a female thread formed on the second washer member; and tightening the bolts to press the outer peripheral surfaces of the first and second washer members against the tapered portion of the pipe so that the antenna support plate and the washer member are pressed together. Means for fixing the position of the antenna, and adjusting the elevation angle of the antenna according to the rotational position of the antenna support plate. 4. A pipe fixed vertically to a mounting bracket, a tapered portion formed inside both upper and lower ends of the pipe, an arm for supporting an antenna inserted into the pipe, and a middle of the arm. A piece which is fixed to one end of the pipe and has an outer peripheral surface formed in a tapered shape, a female screw part provided inside a distal end of an arm inserted into the pipe, and the other of the pipe A washer member that is disposed at an end and has an outer peripheral surface formed in a tapered shape, a bolt that is screwed to the female screw portion at the tip of the arm with the washer member interposed therebetween, and a piece together with the arm by tightening the bolt. Means for moving the arm in the bolt direction and pressing the outer peripheral surfaces of the piece and the washer member against the tapered portion of the pipe to fix the position of the arm. An antenna mounting device for adjusting a phase angle. 5. A pipe fixed vertically to a mounting bracket, a tapered portion formed inside the upper and lower ends of the pipe, an arm for adjusting an antenna azimuth inserted into the pipe from above, A piece fixed in the middle of the arm and attached to the upper end of the pipe and having a tapered outer peripheral surface, a female screw part provided inside the distal end of the arm inserted into the pipe, A washer member arranged at the lower end and having a tapered outer peripheral surface, a bolt screwed into the female screw portion of the lower end of the arm via the washer member, Means for moving the bolt and the outer peripheral surface of the piece and washer member against the tapered portion of the pipe to fix the position of the arm; and adjusting the elevation angle of the antenna mounted on the arm. An antenna mounting device, comprising: an elevation angle adjusting mechanism for adjusting an angle of elevation.