JPH11234011A - Antenna fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate readjusting operation for an antenna direction which required a time so far, when the antenna is directed to a target broadcasting satellite. SOLUTION: An outward directed flange 1 is projected from a base end side and the base end part of a mast 4 where the antenna is fitted and fixed is fitted rotatably in the mast 4, and positioning holes 6 are bored in the outward flange 1 on the same circumference, having its center on the axis of rotation of the mast 4 at intervals of specific azimuth angles to respective geostationary satellites positioned in the sky above the equator and an elastic member 8, having a projection 7 engaging a positioning hole 6, is provided to the support member 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna fixture, and more particularly to a coarse azimuth adjustment for simplifying the operation of adjusting the direction of an antenna when switching the antenna to a geostationary satellite (broadcasting satellite or communication satellite) for reception. This is for an antenna mounting provided with a mechanism.

[0002]

2. Description of the Related Art In general households, the opportunity to switch a geostationary satellite (broadcast satellite or communication satellite) to be received is increasing. In this direction adjustment operation of the antenna, the operation of receiving the satellite signal of the target broadcasting satellite or communication satellite requires experience and is generally difficult.

At present, communication satellites JCSAT-4 and J
CSAT-3 is in geostationary satellite orbit at 124 ° east longitude and 1
They are located at 28 ° and 4 ° intervals. When switching the antennas to these receiving communication satellites, if the azimuth is moved at a certain angle (about 6 ° in Japan), satellite signals from the next communication satellite can be captured. It's easy.

As shown in FIG. 5, a parabolic antenna, for example, is attached to a veranda lattice 101 by a mounting plate 102.
The holding mast 106 is fixed to the tip of a protruding arm 105 protruding from the mounting plate 102 by fixing the mast 106 with the mounting bolt 104.
07 and mount 109 fixed to the back of
And fixed with the end of the mast 106 by screwing with a bolt 110. The azimuth angle is adjusted by rotating the parabolic reflecting mirror 107 around the mast 106 and screwed with a bolt 110, and the elevation angle is adjusted by raising and lowering the center axis 111 of the mount 108 as a center.

[0005] As described above, in the conventional antenna mounting device, the parabola antenna is mounted on the mast fixed to the protruding arm with the mounting device interposed therebetween with the elevation angle and azimuth adjusted, and then fixed.

[0006]

At present, a plurality of geosynchronous satellites (broadcasting satellites and communication satellites) are located in the geosynchronous satellite orbit, and the number of satellites is increasing, and a spare as a spare when the geosynchronous satellite fails. Satellites are located. In order to receive radio waves from each geostationary satellite, it is necessary to switch the parabola antenna toward the geostationary satellite. If a polar mount is used for switching, it is easy to switch the broadcast satellite to be received, but initial setting is difficult and the cost of the polar mount is high, so that it is difficult for general consumers to use.

[0007]

The direction of the geostationary satellite from the receiving point is determined by the elevation angle and the azimuth angle. However, since the position of the geostationary satellite to be received is already known, it is considered at one receiving point. If the azimuth of one geostationary satellite is known, the azimuth of another geostationary satellite is determined. That is, the azimuth angle difference of each geostationary satellite is determined.

[0008] The relationship between the azimuths varies depending on the receiving point depending on the geosynchronous satellite to be received, and the elevation angle of the target broadcast satellite is different only by moving the azimuth of the antenna. However, by changing the azimuth of the antenna and limiting the antenna beam width and the receiving area, satellite signals from other geostationary satellites can be sufficiently captured. In view of the above circumstances, the present invention provides an outward flange protruding from the proximal end side, and rotatably fits the proximal end of the mast to which the antenna is attached and fixed to a support member, thereby providing the outward flange. A positioning hole is formed at a position at a predetermined azimuth angle with respect to each geostationary satellite located above the equator on the same circumference centered on the rotation axis of the mast, and has a projection fitted with the positioning hole. The member was used as an antenna fixture provided on a support member.

Further, as a specific configuration of the present invention, positioning holes corresponding to the azimuth angles of each geostationary satellite in each region are provided at a plurality of locations on the outward flange.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail below with reference to specific embodiments illustrated in the accompanying drawings, in which: FIG. 1 is an overall perspective view, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG.
FIG. 3 is a sectional view taken along line III-III of FIG. Outward flange 1 on base side
The base end of the mast 4 to which the parabolic antenna 2 is attached and fixed via the attachment 3 is rotatably fitted to the tip of the support member 5.

In the outward flange 1, at a location at a predetermined azimuth angle interval (for example, every 2 °, 4 ° or 6 °) on the same circumference around the rotation axis CC of the mast 4. Each of the positioning holes 6 is formed. When receiving radio waves from two adjacent geosynchronous satellites in the geosynchronous satellite orbit (this geosynchronous satellite is hereinafter referred to as a geosynchronous satellite including a communication satellite and a broadcast satellite), at least two positioning holes 6 must be provided. I just need.

A leaf spring 8 having a projection 7 fitted into the positioning hole 6 is screwed onto the support member 5 with a screw 9. The base end of the support member 5 is fixed to a vertical mounting plate 10, and the mounting plate 10
Plate 11 for holding a veranda railing, etc., facing the
And the mounting bolts 12 are screwed to the mounting plate 10 from the holding plate 11 side.

The mast 4 is fitted inside the support member 5 and rotates about a rotation axis CC. A positioning hole 6 is provided on the outward flange 1 at, for example, 6 ° about the rotation axis (when the difference between the directions of two adjacent geostationary satellites is about 6 °), and is fitted into the positioning hole 6. The outward flange 1 is pressed by a leaf spring 8 having a projection 7. If the mast 4 is turned by hand with the above configuration, the azimuth of the parabolic antenna 2 can be easily changed and set at a predetermined position, for example, every 6 °.

Table 1 shows the azimuth angles of each city.

[0015]

[Table 1]

The communication satellite (JCSAT-3) is at 128 ° east longitude on the geostationary satellite orbit above the equator, and the communication satellite (JCSAT-4) is at 124 ° east longitude on the geostationary satellite orbit above the equator. However, if the latitude and longitude of each receiving point are different, the azimuth will be different. Table 1 shows the azimuth and azimuth difference for each city. JCSA
T-3 and JCSAT-4 are 128 E east of the equator
There is a difference of 4 ° between ° and 124 ° east longitude.
°.

Furthermore, the azimuth difference is 6.3 ° in Tokyo, the azimuth difference is 6.6 ° in Osaka, and the azimuth difference is 7.2 in Fukuoka.
In Naha and Naha, the azimuth difference is 9.0 °. The mast 4 is fixed by tightening the fixing bolt 13 screwed to the side of the support member 5 corresponding to the mast 4. The procedure for switching the receiving communication satellite using this antenna fixture will be described below.

First, assuming that the receiving point is Tokyo, an angle difference (such as 4 ° west) in the satellite orbit between the communication satellite currently receiving and the communication satellite to be received from now is calculated. This angle difference is converted from the azimuth angle at the receiving point from Table 1 (4 ° west or 6 ° west). Note that the actual azimuth difference is 6.3 °, but even a deviation of 0.3 ° can be sufficiently received. At this time, since the interval between the positioning holes is 6 °, only one positioning hole needs to be rotated in the west direction. The mast 4 is turned by the difference in the azimuth angle, and the fixing bolt 13 is tightened. In this installation state, the parabolic antenna faces the target communication satellite, can capture the radio wave of the communication satellite, and can maintain a sufficiently high reception level. Fine adjustment may be performed by using an elevation / azimuth adjustment mechanism provided on the mount of the parabolic antenna so that the reception level is maximized.

The angle difference between the azimuth angles can be calculated in advance, so there is no need to display the angle. When switching the antenna from JCSAT-4 to JCSAT-3, the handling explanation is given in a simple expression such as (once west). Can be displayed on the book. FIG. 4 shows the CS radio wave (JCSAT-4) at 128 °.
Is indicated by a solid line, and the position of the parabolic antenna 2 that receives the CS radio wave (JCSAT-3) 124 ° is indicated by a broken line.

Referring to FIG. 5, a positioning hole 6 is provided in the outward flange 1 so as to correspond to the azimuth difference between JCSAT-3 and JCSAT-4 for each region shown in Table 1 in the outward flange 1. . Since the positioning holes 6 corresponding to the respective regions (Sapporo, Tokyo, Fukuoka and Naha) are provided on the outward flange in this way, for example, if the positioning holes indicating (Sapporo) are used at the receiving point (Sapporo), it is easy to use. The communication satellite to be received can be switched. In FIG. 5, the azimuth difference in each area is exaggerated and displayed more than the actual angle.

Further, in FIG. 5, the outward flange is divided into four regions to form four regions.
It is also possible to divide it further finely and provide a positioning hole in accordance with the divided area. 1 to 4
In the embodiment of the present invention, the positioning holes are provided at intervals of 2 °, 4 ° or 6 °. However, the distance between the azimuth angles of the respective regions as shown in Table 1 with respect to one positioning hole (for example, the reference positioning hole) 5.5 degrees from the hole in Sapporo, Tokyo 6.3 degrees, Fukuoka 7.
At 2 °), a positioning hole can be provided. In the above embodiment, the two communication satellites are JCSAT-3 and JCSAT-3.
SAT-4, but in addition, the broadcasting satellite BS-3 (110 ° E) and the communication satellite Superdo C (14E)
A positioning hole can also be provided so as to switch the same for 4 °).

[0022]

According to the present invention, as described above, an outward flange is protruded from the base end side, and the base end of the mast to which the antenna is mounted and fixed is rotatably fitted in the support member. Positioning holes are drilled in the direction flanges at predetermined azimuth intervals with respect to each geostationary satellite located above the equator on the same circumference centered on the rotation axis of the mast, and projections to be fitted with the positioning holes are formed. Since the antenna mounting member has the elastic member provided on the support member, when the direction of the antenna is switched to the broadcast satellite to be received, the readjustment operation of the antenna direction which has been troublesome until now can be extremely easily performed.

Further, since the antenna mounting tool is provided with a positioning hole corresponding to the azimuth of each geostationary satellite in each region at a plurality of locations on the outward flange, the positioning hole is selected and switched according to the receiving region. Even when the azimuth difference from the geostationary satellite varies greatly depending on the area, the operation of pointing the antenna toward the geostationary satellite to be received can be extremely easily performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 shows the position of the parabolic antenna 2 for receiving a CS radio wave (JC-SAT4) 128 ° by a solid line and a CS radio wave (JC-SAT4).
(C-SAT No. 3) It is a plan view showing the position of the parabolic antenna 2 for receiving 124 ° by broken lines.

FIG. 5 is a plan view in which positioning holes corresponding to respective regions are provided at a plurality of locations on an outward flange.

FIG. 6 is a perspective view showing a state in which a conventional parabolic antenna is attached to a mast.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Outward flange 2 ... Parabolic antenna 3 ... Mounting tool 4 ... Mast 5 ... Support member 6 ... Positioning hole 7 ... Projection 8 ... Leaf spring 9 ... Screw 10 ... Mounting plate 11 ... Holding plate 12 ... Mounting bolt 13 ... Fixing bolt

Claims (2)

[Claims] An outward flange is protruded from a base end side, and a base end of a mast to which an antenna is mounted and fixed is rotatably fitted in a support member, and the rotation flange of the mast is centered on the outward flange. A positioning hole is drilled at a position of a predetermined azimuth angle with respect to each geostationary satellite located above the equator on the same circumference, and an elastic member having a projection fitted with the positioning hole is provided on the support member. Antenna mounting tool. 2. The antenna mounting according to claim 1, wherein positioning holes corresponding to the azimuths of the respective geostationary satellites in each area are provided at a plurality of locations on the outward flange.