JPS6268302A - Parabolic antenna - Google Patents

Abstract

PURPOSE:To facilitate the adjustment of an elevating angle by moving vertically a turning center bolt and an elevating angle supporting rod between a support and a slide member so as to provide the adjusting mechanism of the elevating angle by means of a fitting metallic of the link system. CONSTITUTION:A converter 2 is fitted to the front face of a parabolic face 1 so as to receive a radio wave at the focus of the parabolic face by using a converter fitting arm 3 and converter arm supporting rods 4, 5. The parabolic antenna fitting metallic fixture 9 uses a turning fulcrum part 9' formed to the upper part as a support 18 and is slid at first by a straight line slide part 23 of the metallic fixture 9 via an elevating angle fixed slide metallic fixture 11. Then the fixture is slid by using a positioning hole 15 set for the rod 12 by a district by means of a screw 14. Thus, an elevating angle indication scale indicated at a wide range is used for the slide part 23 and the fixture is fitted with high accuracy at each positioning hole 15 of the rod 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a parabolic antenna, and more particularly to a parabolic antenna suitable for adjusting the elevation angle of the parabolic antenna.

[Background of the invention]

Broadcasting satellites are 36. Since it is OOOKm away, it cannot be seen with the naked eye and it is extremely difficult to align the parabolic antenna in the direction of the broadcasting satellite.

In general, the directivity of a parabolic antenna is high (in the case of a satellite broadcasting antenna with a diameter of 1 m, it is half width or 2 degrees. Therefore, the elevation angle of the parabolic antenna must be aligned within an angular error of ±1 degree or less in advance, and the It was attached to an erected support.Then, the azimuth angle was finely adjusted while measuring the output of the receiver and converter.Then, the elevation angle was finely adjusted while measuring in the same way to achieve optimal reception conditions.

Regarding parabolic antennas equipped with this type of adjustment mechanism, please refer to the monthly magazine, TV Technology, April 1984 issue, page 36.
and 39 are listed as generally known methods. An example of these conventional parabolic antennas is shown in FIG.

However, in the conventional parabolic antenna, the rotation angle between the rotation center bolt 10 and the slide window 33 is adjusted by the rotation center bolt 10 and the slider screw 30 within the size range of the mounting bracket 25. There is a drawback that the length of the mechanism is limited and the width of the upward elevation angle display scale 19 is narrow, resulting in poor accuracy.

In addition, in order to improve the accuracy of the elevation adjustment mechanism, the rotation center bolt 1
There are some that can be adjusted by changing the 0 position, but the work is complicated and the work of aligning the bolt holes is complicated, making it difficult to install.

Since the elevation angle adjustment mechanism is provided between the parabolic surface 1 and the pillar 18, the more you try to increase the accuracy of the elevation angle scale, the longer the distance between the parabolic surface I and the pillar 18 becomes, and the screw of the slider becomes longer. The disadvantage was that the structure was large and the production costs were high.

In order to widen the width of the elevation angle display scale, the conventional parabolic surface fixing device 34 with a rotation mechanism needs to be widened, resulting in a correspondingly larger structure and the use of a large amount of iron plate material (which has some drawbacks).

In addition, when adjusting the elevation angle, rotate the screw handle 31 of the slider screw 30 to release the slider stopper 2.
8 and the slider holder by widening or narrowing the space between them, these parts need to be provided with a rotatable mechanism, resulting in a complicated mechanism.

In addition, the force due to wind pressure etc. is applied to the parabolic surface by the rotation center bolt U.
In addition to the need for strength to be transmitted to the pillars through bolts and slider screws, there is also the drawback that the total assembly gaps of each part are added together, making it easy for the elevation angle to be distorted due to wind pressure or the like.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive parabolic antenna that is easy to install by increasing the width of the elevation display scale of the parabolic antenna and facilitating elevation angle adjustment.

[Summary of the invention]

The parabolic antenna of the present invention has a mounting bracket 9 on the back of the parabolic surface 1, which has a sliding portion 23 parallel to the vertical axis of the parabolic surface 1 and a plane passing through the center of the parabolic surface 1 and the converter mounting section. It is characterized by being equipped with a link-type mounting bracket that provides a mechanism for adjusting the elevation angle by moving the rotation center bolt IO and the elevation support rod 12 up and down between the column 18 and the slide portion 23.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 shows a front view of an embodiment of the present invention, in which a converter 2 is placed in front of a parabolic surface 1, and radio waves are received at the focal point of the parabolic surface by a converter mounting arm 3 and converter arm support rods 4 and 5. Show things. FIG. 2 is a side view showing a partial cross-section of the parabolic surface l of FIG. 1.

The parabolic antenna mounting bracket 9 is initially slid with a pivot point 9' formed on the upper part of the mounting bracket 9 on the support 18 by a rotation center bolt 10, and is slid to a linear sliding portion 23 of the bracket to fix the elevation angle. Elevation support rod 1 via metal fitting 11
2 will be shown at our office. Thereafter, it is slid onto the slide 17 inscribed in the column 18 using the positioning holes 15 set for each region of the elevation support rod 12 with screws 14.

The parabolic antenna mounting bracket 9 and the parabolic surface 1 are fixed with screws 6 and 7 at the upper and lower parts of the parabolic surface 1 in alignment with the vertical line of the parabolic surface 1.

FIG. 3 is a partial side view showing the state in which the parabolic antenna mounting bracket 9 and the elevation support rod 12 are assembled to the support column 18.
The elevation support rod 12 is slid onto the linear slide portion 23 by the elevation fixing slide fitting 11. For installation, the elevation angle fixing slide fitting is fixed in advance with the slide fixing screw 13 in alignment with the elevation angle display scale of the linear slide portion 23 at an elevation angle determined in advance for each region.

After that, the determined positioning hole 15 of the elevation support rod 12 is opened.
Insert the screw 14 to secure the slide 171.

Prior to these assembling operations, the support column 18 is slidably attached to a structure that is perpendicular to the building or level ground and is firmly rotatable in the axial direction. The above-mentioned parabolic antenna is attached to the pillar 18, and the parabolic antenna having a pre-designed elevation angle is rotated around the axis of the pillar 18 to measure the output of the converter 2 while adjusting the azimuth angle to set the angle of elevation of the pillar 18 to the optimum value. Stop rotation and stick. After that, loosen the slide fixing screw 13, and then loosen the elevation support rod 12.
The converter 2 is slightly shifted up and down, and the output of the converter 2 is similarly measured. When the best reception is achieved, the slide fixing screw 13 and 16.1 rotation center bolt 10 and screw 14 are tightened to complete the installation.

According to the embodiment of the present invention, the elevation support 1 is slid on the linear slide portion 23 at a predetermined constant angle.
2 and the rotation center bolt 10 determines the elevation angle of the parabolic surface 1. Therefore, using the elevation angle display scale displayed over a wide range on the linear slide portion 23, each positioning hole 15 of the elevation support rod 12 is It can be installed accurately.

In the case of an offset type parabolic antenna, the parabolic surface 1 itself has a constant elevation angle, so at the northern tip of Hokkaido, the elevation angle for adjustment will be small, so it is necessary to use a antenna with a short elevation angle support. Also, since the elevation angle is too small at the southern end for general use, use the outside of the positioning hole 15. As a result, two types of elevation angle display scales can be displayed within a certain range, thereby widening the range of elevation angle adjustment, doubling the installation accuracy, and providing an item that is easy to install. It goes without saying that if three positioning holes 15 are provided, three types of elevation angle display scales can be displayed.

Further, the parabolic antenna mounting bracket of this embodiment does not require an elevation adjustment mechanism using screws or the like, and can be adjusted by moving the slide portion up and down. In this way, since there is no large-scale structure between the parabolic surface l and the pillar 18, the distance between the parabolic surface l and the pillar 18 can be shortened, and a parabolic antenna can be provided that is inexpensive to manufacture.

Further, force such as wind pressure applied to the parabolic surface is transmitted to the support column 18 as a distributed load through the rotation center bolt 10 and the elevation support rod 12 by the screw 14. For this reason, the load capacity of the mounting bracket can be reduced, less material can be used, and it can be manufactured at a lower cost.

FIG. 5 shows an example in which the parabolic antenna mounting bracket 9 is fixed to the front of the parabolic surface 1 with screws, rivets, etc., and the effect is similar to that of the parabolic antenna shown in FIG. 1. In other words, even if wind pressure is applied to the parabolic surface, the wind pressure is distributed across the top and bottom of the parabolic surface, so there is less deformation of the parabolic surface.
In particular, deformation near the center of the parabolic surface, which greatly affects reception performance, can be reduced.

[Effects of the Invention] According to the present invention, there is provided a mechanism for adjusting the elevation angle by moving an elevation support rod up and down between a column and a linear slide part, and an elevation angle display displayed over a wide range on the linear slide part. It can be installed with high precision because it is adjusted using a scale.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention showing a state in which a parabolic antenna is assembled to a support; 2 is a partial side view showing a state in which the parabolic antenna mounting bracket is assembled to a support column, and FIG. 4 is a perspective view showing a state in which the parabolic antenna mounting bracket and elevation support rod in FIG. 3 are assembled. Fifth
The figure is a side view showing a partially sectional view of the parabolic surface showing the parabolic antenna mounting bracket attached to the parabolic surface, and Figure 6 is a side view showing the installation state of the parabolic antenna using the conventional parabolic antenna mounting bracket. It is a diagram. ■... Parabolic surface, 2... Converter, 3... Converter mounting arm, 4... Converter arm support rod, 5... Converter arm support rod, 6... Screw, 7
...screw, 8...screw, 9...parabolic antenna mounting bracket, 9'...rotation fulcrum, 10...rotation center bolt, 11...elevation angle fixing slide bracket, 12...・
Elevation support rod, 13...Slide fixing screw, 14...
Screw, 15... Positioning hole, l 6... Slide fixing screw, 17... Slide, 18... Support column, 19
...Elevation angle display scale, 20...Local name display, 21...
・Lower parabolic surface mounting screw hole, 22... Converter arm mounting screw hole, 23... Straight slide part, 24.
...Top parabolic surface mounting screw hole, 25...Mounting bracket,
26...U bolt, 27...wing nut, 28...
Slide stopper, 29...Slide receiver, 30...
・Screw for slider, 31... Screw handle, 32... Elevation pointer, 33... Slide window, 3
4... Parabolic surface fixture with rotation mechanism. Agent: Patent Attorney Katsoo Ogawa Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A mounting bracket having a linear sliding part, a rotation fulcrum part formed on the upper part of the mounting bracket and supported by a column so as to be rotatable in the vertical direction, and a linear sliding part and the column. 1. A parabolic antenna comprising: an elevation support rod for adjusting the elevation angle of the parabolic antenna, which is slidably provided between the parabolic antenna. 2. The parabolic antenna according to claim 1, which has a mounting bracket with elevation angles, major city names, etc. provided on the surface of the sliding portion by printed labels or engravings based on pre-designed values at each point of the linear sliding portion. . 3. Two or more holes are provided in the elevation angle support rod, and they are used for adjusting low elevation angles and high elevation angles, and the elevation angle scale and city name display designed in advance on the linear slide part correspond to the number of holes. Claim 1 has a mounting bracket characterized in that it is provided with a mounting bracket.
The parabolic antenna described.