JPH021926Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a parabolic antenna mounting bracket for attaching a reflecting mirror of a parabolic antenna for receiving satellite broadcasting to a support and adjusting the direction (elevation angle and azimuth angle) of the reflecting mirror.

Satellite broadcasting transmits radio waves from a point 36,000 km above the equator, so the radio waves received on Earth are extremely weak. Therefore, in order to receive the radio waves at home, a highly sensitive antenna is required. As this highly sensitive antenna, a parabolic antenna is the most common in current technology.

However, with a parabolic antenna with high gain, the directivity becomes sharp, so when aligning the direction of the parabolic surface to the direction of the broadcasting satellite, or correcting the angle if it deviates due to wind pressure after installation, etc., the best point can be found at a small angle. A number of measures are required to adapt to this.

As described above, unlike conventional parabolic antennas for business use, parabolic antennas for home use used for receiving satellite broadcasting are required to be easy to operate.

The present invention was developed in view of the above circumstances, and its purpose is to provide a parabolic antenna mounting bracket that allows the direction of the parabolic antenna to be adjusted with simple operation even when the angle is shifted due to wind, etc. Our goal is to provide the following.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the overall configuration of a satellite broadcast receiving apparatus. This satellite broadcast receiving apparatus is comprised of a reflector 11, a primary sub-radiator 12, a converter 13, a direction adjustment measuring device 14, a tuner 15, a television receiver 16, and a coaxial cable 17 for connection.

That is, broadcast radio waves from a broadcasting satellite are reflected by a reflector 11, then sent to a converter 13 via a primary sub-radiator 12, and frequency-converted to a first intermediate frequency band (1.035 to 1.335 GHz).
amplified to an appropriate level. This converter 1
The output of No. 3 is sent to an indoor tuner 15 via a coaxial cable 17, where a desired channel is selected from among the first intermediate frequency signals, and the video and audio signals are demodulated and reproduced. The output signal of the tuner 15 is then sent to the television receiver 16, whereby the program is broadcast.

The reflector 11 is attached to a support 29 by means of a mounting bracket 19.
is attached to. This mounting bracket 19 has a mechanism for coarse and fine adjustment of the direction (elevation angle, azimuth angle) of the reflecting mirror 11, and the above-mentioned direction adjustment measuring device 14 is used for the adjustment.

FIG. 2 shows the specific structure of the mounting fitting 19. The mounting bracket 19 is composed of a fixed frame 21, movable frames 22, 23, an Ω-shaped fixed band 24, an elevation coarse and fine adjustment mechanism 25 , and an azimuth coarse and fine adjustment mechanism 26 .

The fixed frame 21 is bent into a U-shape, and movable frames 22 and 23 are attached to bent pieces 21a and 21b on both sides from the outside, respectively. The movable frames 22 and 23 are fastened and fixed to the upper ends of the bent pieces 21a and 21b of the fixed frame 21 by screws 26a and 26b at their upper corners, respectively. movable frame 22,
23 is bent into an L-shape, and four screws 2 are attached to these bent pieces 22a, 23a.
7a, 27b, 27c, 27d, reflecting mirror 1
It is firmly fixed to a rib 28 attached to the back surface of 1. Reflector 11 of fixed frame 21
A fixing band 24 is attached to the side surface with the support 29 in between.
However, the azimuth adjustment screws 30a, 30b, 30
c and 30d to be firmly tightened and fixed. Thereby, the fixed frame 21 is fixed to the support column 29. That is, by rotating the movable frames 22 and 23 about the screw portions 26a and 26b with respect to the fixed frame 21, the elevation angle of the reflecting mirror 11 can be adjusted.

At the mounting positions of the screws 30a to 30d, reinforcing angles 31a and 31b extending horizontally to the fixed frame 21 are fixed, for example, by spot welding, and the fixed frame 21 is also provided with two sets of reinforcing recesses 32a extending vertically. 32b, 33a, 3
3b and a reinforcing convex portion 34 extending in the horizontal direction, thereby strengthening the strength against tightening of the screws 30a to 30b of the fixed frame 21. Furthermore, the vertical reinforcing recess 32
a, 32b, 33a, and 33b also serve as guides when the support column 29 is inserted.

Note that the holes provided in the reinforcing angles 31a, 31b and the fixed frame 21 for attaching the screws 30a to 30d are elongated holes, and
An appropriate mounting position can be set according to the thickness of the 9 (60.5 to 101.6 mmφ).

Moreover, the screws 26a of the movable frames 22 and 23,
A U-shaped hanging fitting 35 for transportation is attached to the portion 26b. This hanging bracket 35 is used as a handle when transporting the mounting bracket 19, and also serves to prevent the mounting bracket 19 from falling by placing it on the top of the support post 29 when the mounting bracket 19 is attached to the support post 29. I also have one.

The coarse and fine adjustment mechanism 25 for the elevation angle has an angle display name plate 36 provided on the side surface of one movable frame 22, and the screws 26a and 26b provided along the display part of the angle display name plate 36 as the axis. It is comprised of a circular arc-shaped groove 37, a coarse elevation adjustment fixing screw 38, a fine elevation adjustment fixing screw 39, and a knob 40 for fine elevation adjustment. The angle display nameplate 36 is printed with the names of representative cities around Japan (Tokyo, Osaka, etc.) and an approximate angle scale 36a, so that the approximate elevation angle at the installation location can be set in advance. As shown in FIGS. 3 and 4, one of the screws 38 is attached to the groove 37 of the movable frame 22 by a nut 42 with a washer 41a and a spring washer 41b interposed therebetween.
The other screw 39 is also inserted into the groove 3 of the movable frame 22 by means of a nut 44 with an arrow plate 43 interposed therebetween for indicating the angle scale 36a of the angle display name plate 36.
It is attached to part 7. Furthermore, this screw 3
9 passes through a hole 45 having approximately the same diameter as the screw 39 provided in the bent piece 21 a of the fixed frame 21 . Note that, opposite to this screw 39, a threaded portion (not shown) having the same structure is provided on the movable frame 23 side in order to fix the movable frame 23 to the bent piece 21b of the fixed frame 21. . The shaft 46 of the elevation angle fine adjustment knob 40 passes through a through hole 47 provided in the screw 39, and is further screwed into a threaded hole 38a provided in the screw 38 at a threaded portion 46a provided at the tip thereof. It's getting old.
Further, grooves 48 are provided in the shaft 46 along the circumference before and after the penetration portion of the screw 39, respectively. E-rings 49 made of an elastic material are attached to these grooves 48, 48, respectively, and these E-rings 49 prevent the shaft 46 from shifting from the through hole 47. The elevation angle fine adjustment knob 40 is used by being lifted up to a notch 50 provided at the lower end of the fixed frame 21 during adjustment, but when packing it is pushed down as shown by the broken line, making it convenient for packing operations. It has a structure. Moreover, the bent pieces 21a, 2 of the fixed frame 21
1b has two opposing pairs of through holes 51a, 51a,
51b, 51b are provided, and the L-shaped groove 52 is passed through one of the pairs depending on the thickness of the support 29. That is, by penetrating the L-shaped groove 52 before the fixing band 24 is fixed, rotation of the mounting bracket 19 is prevented and the mounting work is stabilized.

The coarse and fine adjustment mechanism 26 for the azimuth angle is composed of a pair of Ω-shaped fixed bands 53 and 54 and a knob 55 for fine adjustment of the azimuth angle. The fixing bands 53 and 54 are attached to the screws 5 while holding the support 29 between them.
6 and 57 are tightened and fixed. One end of one fixed band 54 is bent into an L shape,
This L-shaped portion 58 is provided with a fulcrum portion 59 having a screw hole 59a. And this fulcrum part 5
A threaded portion 60a provided on the shaft 60 of the azimuth fine adjustment knob 55 is screwed into the threaded hole 59a of the azimuth angle fine adjustment knob 55. Further, a cylindrical fulcrum portion 61 is fixed to the shaft 60 near the azimuth fine adjustment knob 55 . A groove 61 having a width approximately equal to the plate thickness of the fixed frame 21 is provided on the outer circumference of the fulcrum portion 61.
a is provided, and this groove 61a is fitted into either one of the notches 62 and 63 provided at the lower end of the fixed frame 21. Note that the choice between the notch 62 and 63 depends on the strut 2.
It is determined by the thickness of 9.

Further, arrows A and B are provided on the fixed frame 21, so that the direction of rotation of each reflecting mirror 11 when the elevation angle fine adjustment knob 40 and the azimuth angle fine adjustment knob 55 are turned can be seen at a glance. ing.

Next, specific operations for attaching the mounting bracket 19 having the above configuration will be described. First, pillar 2
9, move the arrow board 43 to the position of the elevation angle specified in advance on the angle display name plate 36 (for example, 30 degrees in Sapporo), and fix the elevation angle rough adjustment fixing screw 38 with the nut 42. Next, after confirming that the pillar 29 erected in a predetermined position is vertical, loosen the screws 30a to 30b of the fixing band 24, and while lifting the hanging bracket 35 upward, connect the fixing frame 21 and the fixing band. By passing the support 29 between the support 24 and the support 24, and placing the hanging fitting 35 on the top of the support 29, the mounting fitting 19 is prevented from falling. In this state, as shown in FIG.
The coaxial cable 17 from the direction adjustment measuring device 14
Connect via. Then, after turning on the power switch to bring it into operation, the reflector 11 is gently rotated in the southwest direction, and stopped at the maximum direction while observing the deflection of the needle of the direction adjustment measuring device 14. In this state, the fixing bands 53 and 54 for azimuth adjustment are firmly fixed to the support column 29 using screws 56 and 57. Furthermore, the elevation screw 38 is lightly fixed with a nut 42. This completes the rough adjustment of the elevation and azimuth angles.

Next, we will make some fine adjustments, but before that,
The fixing band 24 is temporarily tightened to the fixed frame 21 by lightly tightening the screws 30a to 30d.

When performing fine adjustment of the azimuth angle, the azimuth angle fine adjustment knob 55 is turned and stopped at the position where the deflection of the needle of the azimuth adjustment measuring device 14 is maximum. In this case, when the azimuth angle fine adjustment knob 55 is turned, the distance between the supporting points 59 and 61 (indicated by _L1 in FIG. 2) changes, but the fixing bands 53 and 54 are firmly fixed to the support column 29. Therefore, one fulcrum part 59 does not move, and therefore, the fixed frame 21, that is, the entire mounting bracket 19 rotates slightly together with the other fulcrum part 61. As a result, the azimuth angle of the reflecting mirror 11 is finely adjusted.

When finely adjusting the elevation angle, turn the elevation fine adjustment knob 40 and stop at the position where the deflection of the needle of the azimuth adjustment measuring device 14 is maximum, as in the case of azimuth adjustment. . In this case, when the elevation angle fine adjustment knob 40 is turned, the E-ring 49 on the shaft 46 prevents it from shifting in the through hole 47 of the screw 39, and therefore the distance between the screws 38 and 39 of the shaft 46 (see FIG. ) _changes . However,
One screw 39 side is the bent piece 2 of the fixed frame 21.
Since the screw 39 passes through a circular hole 45 provided in the screw 1a and has approximately the same diameter as the screw 39, the screw 39 does not move. rotates slightly in the vertical direction. Accordingly, the angle scale 36a of the angle display nameplate 36 provided on the movable frame 22 moves, and the angle indicated by the arrow board 43 changes. Thereby, the elevation angle of the reflecting mirror 11 is finely adjusted.

When the fine adjustment of the horizontal direction and the elevation angle is completed, the elevation adjustment screws 38 and 39 and the azimuth adjustment screws 30a to 30, which were temporarily tightened last, are
The installation is completed by strongly tightening each part 30d.

As described above, according to the present invention, the configuration is simple, so the operability is improved, and the direction of the parabolic antenna can be easily adjusted even when the set angle is shifted during installation or due to wind, etc. Suitable as a mounting bracket for a parabolic antenna for broadcast reception.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the overall configuration of a satellite broadcast receiving device according to an embodiment of the present invention, FIG. 2 is a perspective view similarly showing the configuration of a parabolic antenna mounting bracket, and FIGS. 3 and 4 are respectively the above-mentioned FIG. 3 is a cross-sectional view showing a coarse adjustment and fine adjustment mechanism for the elevation angle of the mounting bracket. 11...Reflector, 12...Primary secondary radiator, 13...
...Converter, 14...Measuring device for direction adjustment, 15
...Chiyuna, 16...Television receiver, 1
7... Coaxial cable, 19... Mounting bracket, 21...
...Fixed frame, 22, 23...Movable frame,
24...Fixing band, 25 ...Elevation angle coarse adjustment and fine adjustment mechanism, 26 ...Azimuth angle coarse adjustment and fine adjustment mechanism, 35...Hanging fitting, 36...Angle display nameplate.

Claims (1)

[Claim for Utility Model Registration] In a parabolic antenna mounting bracket for attaching a reflector of a parabolic antenna for satellite broadcasting reception to a post and adjusting the direction of the reflector, the fixing frame attached to the said post is shaped like a U-shape. One piece of the movable frame is bent and formed into an L-shape and fixed to the back surface of the reflecting mirror.The other piece of the movable frame is fixed to the back side of the reflecting mirror, and the upper angle area is rotated with a screw to the outside of the bent pieces on both sides of the fixed frame. A through hole for the fine elevation adjustment fixing screw of the fixed frame is provided on the lower side of this screw mounting surface, and a screw near the upper corner is set as the axis of the movable frame at a position corresponding to this through hole. An arc-shaped groove is provided, and the fine elevation adjustment fixing screw is installed by passing through the through hole of the fine elevation adjustment fixing screw in the fixed frame and the arcuate groove of the movable frame, and the movable frame is further provided with a screw located on the mirror side of the arcuate groove. A coarse elevation adjustment fixing screw is installed at a certain distance from the fine elevation adjustment fixing screw, and is rotatable with respect to the fine elevation adjustment fixing screw in a direction perpendicular to the axes of the fine elevation adjustment fixing screw and the coarse elevation adjustment fixing screw. A first adjustment is provided in which an elevation adjustment knob whose movement is restricted in the front-rear direction is passed through the elevation fine adjustment fixing screw and screwed onto the elevation coarse adjustment fixing screw to perform coarse and fine elevation adjustment. A mechanism, a band with one end bent into an L-shape and a rotatable fulcrum on the top surface are clamped and fixed to a support.
A notch is provided at the lower end of the fixed frame, and an azimuth fine adjustment knob having a groove that fits into the notch of the fixed frame with the fixed frame placed on the band is screwed onto the fulcrum part. It is equipped with a second adjustment mechanism that adjusts the azimuth angle and a direction indicator that indicates the first direction angle, and prevents the mounting bracket from falling when attached to a support, and also prevents the mounting bracket from falling when it is attached to a support. A parabolic antenna mounting bracket that is unique in that it is equipped with a hanging bracket.