JPS641767Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an antenna direction adjustment device, and in particular, the elevation angle adjustment device of a parabolic antenna for receiving satellite broadcasting, etc.
The present invention relates to an antenna direction adjustment device that performs coarse and fine adjustment of azimuth angle. Conventionally, most devices for receiving satellite broadcasting have been equipped with a large rotating mechanism and an automatic tracking mechanism for communication purposes.

However, for example, with the broadcasting satellite Bs-2a scheduled to be launched in February 1984, the reception targets are general receivers, and the installation work of the antenna converter may be carried out directly by general users. Large ones are not preferred. In addition, since the receiving system receives weak radio waves from the satellite, the gain of the antenna is large and the half-value angle of directivity is also very sharp, and the antenna direction cannot be adjusted even by a few degrees.

This idea was made in view of the above points,
The purpose is to provide a small antenna direction adjustment device that has a simple configuration, can accurately and easily adjust the antenna direction.

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 shows a state in which a parabolic antenna 12 for receiving satellite broadcasting is attached to a roof 13 using the antenna direction adjustment device 11 of this invention. FIG. 2 shows the antenna direction adjustment device 11.
FIG. 2 is a diagram showing a specific configuration of the system. In the same figure,
Reference numeral 21 denotes a mounting plate having, for example, a semicircular mounting surface, and is mounted on the roof 13 or the like. Although this mounting plate 21 is not shown, legs 14 and 15 of different lengths are integrated in accordance with the inclination of the roof 13, as shown in FIG. 1, for example. One longitudinal end of a metal fitting 22 having a concave cross section is attached to the mounting plate 21 with a screw 23 . The other end of the metal fitting 22 is attached to a pair of reinforcing ribs 24 , 24 provided on the back surface of the parabolic antenna 12 with screws 25 . This metal fitting 2 is attached to both side walls 27, 27 of the metal fitting 22.
Elongated holes 28 are provided along the longitudinal direction of the two. Further, each of the long holes 28, 28 has a plurality of (for example, six) semicircular grooves 29.
are provided facing each other. An elevation angle coarse setting rod 30 is inserted between these opposing grooves 29, 29 in accordance with a desired elevation angle. The elevation angle coarse setting rod 30 is fixed at both ends by screws 31. On the other hand, reinforcing rib 2
A support rod 32 is extended between the screws 4 and 24 above the screw 25 portion. This support rod 32 is tightened and fixed by screws 33.
The support rod 32 and the coarse elevation setting rod 30 are connected by a connecting rod 34 for fine adjustment of the elevation angle. A threaded portion 35 is provided at the end of the elevation angle coarse setting rod 30 side of the elevation angle fine adjustment connecting rod 34, and by adjusting a nut 36 with this threaded portion 35, the length of the elevation angle fine adjustment connecting rod 34 can be adjusted. Parabolic antenna 1
The elevation angle of 2 can be finely adjusted.

Furthermore, a slit 37 is provided in the mounting plate 21 along a concentric circle centered on the screw 23 portion. At the bottom of the metal fitting 22 is a screw 3 for rough adjustment of the azimuth angle.
8 is installed, and this azimuth coarse adjustment screw 3
8 along the slit 37, the azimuth angle can be coarsely adjusted.
L-shaped support fittings 39 are fixed to the mounting plate 21 at both ends of the slit 37, respectively. These support fittings 39, 39 and the respective antenna side ends of both side walls 27, 27 of the mounting plate 21 are connected by connection rods 40, 40 for fine azimuth adjustment.
A threaded portion 41 is provided at the end of the connecting rod 40 on the side of the support fitting 39 for fine adjustment of the azimuth angle, and by adjusting the thumbscrew 42 with this threaded portion 41, the azimuth angle of the parabolic antenna 12 can be finely adjusted. People are starting to do this.

Next, an adjustment method using the antenna direction adjustment device having the above configuration will be explained. First, before adjusting the elevation and azimuth angles, the mounting plate 21 and the metal fittings 22 are lightly temporarily tightened with screws 23 when attaching the parabolic antenna 12. In addition, the screw 33 of the reinforcing rib 24, the nut 36 of the elevation angle fine adjustment connecting rod 34, etc. are all temporarily tightened. Then, when adjusting the elevation angle, with the nut 36 loosened, insert the elevation coarse setting rod 30 between the grooves 29, 29,
Tighten the screw 31 to orient the parabolic antenna 12 approximately toward the satellite. At this time, while watching a level meter (not shown), set the pointer in the direction in which it swings to its maximum, and then firmly tighten the screw 33 of the support rod 32 to fix it. Next, the connecting rod 3 for fine adjustment of the elevation angle
4.Turn the nut 36 and find the maximum point of meter deflection. This completes the fine adjustment of the elevation angle.

Next, the azimuth angle is adjusted, but in this case, the screw 23 and the azimuth coarse adjustment screw 38 are used.
After confirming that the metal fittings 22 are loose, attach the metal fittings 22 to the mounting plate 2.
1 and turn it toward the satellite to find the maximum swing point of the meter. Once the maximum deflection point is determined, the azimuth rough adjustment screw 38 is tightened and fixed. Furthermore, thumbscrew 42
By turning , find the maximum point of meter deflection and make fine adjustments. This kind of adjustment work 2,
Repeat this three times to obtain the maximum sensitivity of the meter, and then tighten the screws of each part firmly. In addition, in Japan, when installing an antenna, the angle of elevation must be
It is convenient to be able to adjust the angle between 25 and 75 degrees, and the azimuth within 180 degrees.

In this way, in the antenna direction adjustment device, coarse adjustment and fine adjustment of the elevation angle and azimuth angle can be performed independently.

In the above embodiment, the case where this invention is applied to an antenna for receiving satellite broadcasting has been described, but it is of course applicable to other antennas that require various fine adjustments. Further, in the above embodiment, the mounting plate 21 has a semicircular shape, but if the setting range of the azimuth angle is wide, it may be circular.

As described above, according to this invention, coarse adjustment and fine adjustment of the antenna direction (elevation angle and azimuth angle) can be performed independently with a simple configuration. An antenna direction adjustment device that can be adjusted can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic view showing the installed state of an antenna direction adjusting device according to an embodiment of the invention, and FIG. 2 is a perspective view showing the specific configuration of the device. 11... Antenna direction adjustment device, 12... Parabolic antenna, 21... Mounting plate, 22... Metal fittings,
23... Screw, 24... Reinforcing rib, 28... Elongated hole, 29... Groove, 30... Rough angle setting rod, 32...
...Support rod, 34...Connection rod for fine adjustment of elevation angle, 36...
Nut, 37...Slit, 38...Screw for coarse adjustment of azimuth angle, 40...Connecting rod for fine adjustment of azimuth angle, 42...
Thumbscrew.

Claims (1)

[Scope of utility model registration request] a mounting plate, a metal fitting having a concave cross section, one end of which is attached to a pair of reinforcing ribs provided on the antenna, and the other end of which is attached to the mounting plate with a screw at the bottom; a pair of elongated holes provided in both side walls of the concave metal fitting, an elevation rough setting rod that is inserted between the opposing grooves according to a desired elevation angle, and a reinforcing rib. an elevation angle fine adjustment mechanism that connects the extended support rod, the elevation coarse setting rod and the support rod, and finely adjusts the distance between them according to a desired elevation angle; A slit portion provided along a concentric circle centered on the threaded portion,
An azimuth rough adjustment screw that slides along the slit portion and fixes the recessed metal fitting to the mounting plate, and connects both ends of the slit portion and the antenna side end of the recessed metal fitting, respectively; An antenna direction adjustment device comprising: an azimuth angle fine adjustment mechanism that finely adjusts the distance between the two according to a desired azimuth angle.