JPS6353725B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an installation angle adjustment device for a parabolic reflector.

An offset parabolic reflector antenna is used to receive SHF radio waves from satellite broadcasting, but because the directivity of the offset parabolic reflector antenna for receiving SHF radio waves is sharp, the installation angle of the parabolic reflector in azimuth and elevation relative to the broadcasting satellite is Must be accurate. However, many conventional devices of this type
The outer tube that is vertically attached to the board on which the parabolic reflector is attached is fitted onto the upper end of the mast, the parabolic reflector is pointed in the best direction using an instrument, and the mounting bolts on the side wall of the outer tube are screwed. , it is quite difficult to tighten multiple mounting bolts evenly, and furthermore, the tip of the mounting bolts does not necessarily contact the outer circumferential surface of the mast perpendicularly, so a parabolic reflector is the best option when tightening the mast. Slightly rotated from the direction,
This reduces the reception performance of SHF radio waves. This is especially true when the mast is prismatic rather than cylindrical. Therefore, in view of the above circumstances, the present invention aims to make the azimuth of parabolic reflector installation accurate and easy. An adjustment plate equipped with a reflector is rotatably mounted, and the tip of the handle supported on the adjustment plate can be attached to multiple locations on the outer circumferential surface of the board, and can be screwed into an adjustment nut that is rotatably held. It is something. That is,
The azimuth angle of the parabolic reflector with respect to the broadcasting satellite is determined by rotating the adjustment plate on which the parabolic reflector is attached on a fixed horizontal board, and fine adjustment of the azimuth angle is made using a handle supported on the adjustment plate and the outer peripheral surface of the board. This is done by screwing together an adjustment nut held in the mast, and in addition, the board can be adjusted in any direction in 360 directions, even if the board is fixed to any position on the mast. It is characterized by

Hereinafter, the present invention will be described in detail based on specific embodiments shown in the accompanying drawings.

The adjustment plate 1 has a rectangular shape in plan view, and both sides thereof are bent downward to form side walls 2. The lower portions of both vertical ribs 4 on the back surface of a parabolic reflector 3 of a satellite broadcasting offset type antenna are pivoted to the front of both side walls 2 of this adjustment plate 1. Further, support members 5 and 6 are provided between the upper side of both vertical ribs 4 of the parabolic reflector 3 and the rear side of both side walls 2 of the adjustment plate 1. That is, the support member 5 has a turnbuckle 9 interposed between the upper support rod 7 and the lower support rod 8, and the upper end of the upper support rod 7 is adjusted so that the lower end of the lower support rod 8 is above the vertical rib 4 of the parabolic reflector 3. The other supporting members 6 are each pivotally attached to the rear of the side wall 2 of the plate 1, and the other supporting members 6 are made of sheet metal formed into a U-shaped cross section with a long hole 10 cut in the lower part, and the upper end thereof is connected to the vertical rib 4 of the parabolic reflector 3. The bolt 11 is pivoted on the upper side and the bolt 11 is attached on the lower side through the elongated hole 10.
and screw it to the rear of the side wall 2 of the adjustment plate 1.

The exterior cylinder 12 has a cylindrical shape and is formed in a size that can be externally fitted onto the upper end of the mast 13, and a disk-shaped base plate 14 on which the adjustment plate 1 can be placed is fixed by welding to the upper end surface of the exterior cylinder 12. A total of four mounting bolts 15, two each on the upper and lower sides, which are fixed to the mast 13, are screwed into the side wall of the exterior cylinder 12. The substrate 14 is made of sheet metal and has a disk-shaped side wall 16 facing downward over the entire circumference. A support shaft 17 is erected upward at the center of the substrate 14, and the adjustment plate 1, on which the parabolic reflector 3 is mounted, is placed on the substrate 14 so as to be rotatable about the support shaft 17.

A, which divides the circumference of the side wall 16 of the substrate 14 into four equal parts,
A bracket 18 is provided radially protruding from one of the four arbitrary positions B, C, and D (position A in this embodiment), and a flange 19 is attached to the head at the tip of the bracket 18.
A cylindrical adjustment nut 20 having a diameter is rotatably fitted, and a horizontal screw thread 21 is carved in the center of the adjustment nut 20.

A bent support plate 22 is fixed to the side wall 2 of the adjustment plate 1 in front of the position of the bolt 11 that screws down the support member 6, and a handle 24 with a thread 23 carved at the tip is inserted horizontally. A flat washer 25 is externally fitted to the support portion, and a cotter pin 26 is inserted into the shaft portion of the handle 24 so as to protrude.The handle 24 is rotatable but cannot be moved forward or backward relative to the adjustment plate 1. is screwed onto the adjusting nut 20.

Two arc-shaped elongated holes 27 with a center angle of 90° are cut into the adjustment plate at positions dividing the same circumference into two with the support shaft 17 as the center, and the ends of each of the arc-shaped elongated holes 27, i.e. A', B', C' at the positions where the circumference is divided into four equal parts,
Taps 28 are carved at positions on the substrate 14 corresponding to the four locations D'.

By moving the position A of the adjusting nut 20 away from the side wall 16, the adjustable range of the azimuth angle can be up to 120 degrees, but the position of the adjusting nut 20 is quite far away from the side wall 16, making it difficult to use in practice. There are many problems. In the illustrated example, the maximum adjustable range is 90 degrees, and one adjusting nut 20 is attached to any of four attachment positions provided on the outer peripheral surface of the base plate 14. And one adjustment nut 2
The adjustment range for 0 is 5, 6, 90° to 360° of the circumference.
Angles divided by integers such as 7, 8, etc. are possible. However, in practice, it is desirable to arrange the adjusting nuts 20 at positions divided into eight equal parts of the circumference where the amount of adjustment per time is 45 degrees. In addition, in the illustrated example, the adjusting plate 1
Two arc-shaped elongated holes 27 into which the fixing bolts 29 are inserted in order to fix it to the board 14 are provided with a center angle of 90 degrees at positions that divide the circumference into two, and the two fixing bolts 29 are screwed into the holes 27. Four taps 28 are carved into the substrate 14, and four arcuate long holes 27 with a center angle of 45° are formed.
It is also practically effective as eight taps 28 to which four fixing bolts 29 are screwed.

Next, the operation of the parabolic reflector will be explained.

The parabolic reflector 3 is attached to the adjustment plate 1, and the adjustment plate 1 is rotatably placed on the base plate 14, and the tip of the handle 24 of the adjustment plate 1 and the adjustment nut 20 on the outer peripheral surface of the base plate 14 are screwed together. Then, the outer cylinder 12 fixed to the lower center of the board 14 is externally fitted onto the upper end of the mast 13.

Next, the azimuth and elevation angles of the parabolic reflector 3 relative to the broadcast satellite are found using instruments. The azimuth angle of the parabolic reflector 3 is determined by rotating the adjusting plate 1 on the horizontal base plate 14, screwing the mounting bolt 15 in the approximate direction, fixing the base plate 14 to the mast 13, and fixing the base plate 14 to the mast 13.
Next, the azimuth angle of the parabolic reflector 3 is adjusted by rotating the handle 24 to the right or left to slightly move the adjustment plate 1 with respect to the stationary substrate 14, and the azimuth is determined. Fixing bolt 29 in hole 27
is inserted and screwed onto the tap 28 to fix the adjustment plate 1 to the base plate 14. Further, when installing the adjustment plate 1 in any direction while the base plate 14 is once screwed to the mast 13 with the mounting bolts 15, the following procedure is performed.

Now, the tip of the handle 24 is screwed into the adjustment nut 20 at position A, and when the handle 24 is turned to the right, the adjustment plate 1 rotates around the support shaft 17 on the base plate 14, moves 90 degrees, and then stops. The relative position of the adjusting nut 20 moves from A to B. The relative position of the adjusting nut 20 moves from A to B. At this time, the tip of the handle 24 rotates within an angle θ° using the support portion P of the handle 24 as a fulcrum. Attach the fixing bolt 29 to A',
By screwing into the tap 28 of C', the adjustment plate 1 can be fixed to the base plate 14 at any position within the range of one azimuth angle adjustment. Furthermore, when making large adjustments to the direction, turn the adjustment nut 20 at position A to bracket 1.
All you have to do is change it to position B along with 8 and repeat the above operation.

Furthermore, the elevation angle of the parabolic reflector 3 is
Loosen the bolt 11 at the lower end of the support member 5.
Turn the turnbuckle 9 to the right or left to extend or contract the length of the support member 5, and in the other support member 6, the elongated hole 10 is guided by the bolt 11, find the best angle of elevation, and screw the bolt 11. .

As described above, the present invention pivots the lower back surface of the parabolic reflector to the front of the adjustment plate, and both ends of the support member with a turnbuckle interposed therebetween are respectively pivoted to the upper back surface of the parabolic reflector and the rear of the adjustment plate. The adjustment plate is rotatable around a spindle that is erected at the center of the board on a disk-shaped board fixed to the upper end surface of the outer cylinder, which is externally fitted onto the upper end of the mast and a mounting bolt is screwed into the side wall. The installation angle of the parabolic reflector is such that the tip of the handle, which is placed on the adjustment plate so that it can be rotated forward and backward, can be attached to multiple locations on the outer circumferential surface of the board and screwed into an adjustment nut that is held rotatably. This is an adjustment device in which an adjustment plate equipped with a parabolic reflector is rotatably mounted on a horizontal board fixed to the upper end surface of an exterior cylinder that is externally fitted and screwed onto the upper end of the mast, and is supported by the adjustment plate. The tip of the handle can be attached to multiple locations on the outer circumferential surface of the board and screwed into a rotatably held adjustment nut, making it possible to accurately and easily set the installation angle of the parabolic reflector. No matter where the board is fixed to the mast, the azimuth can be adjusted 360° with the board fixed to the mast.

[Brief explanation of the drawing]

The drawings show a specific embodiment of the present invention; Fig. 1 is a rear view, Fig. 2 is a right side view, Fig. 3 is a left side view, Fig. 4 is a plan view, and Fig. 5 is a main part. Enlarged perspective view,
FIG. 6 is a side view of FIG. 1. 3... Parabolic reflector, 1... Adjustment plate, 9...
Turnbuckle, 5...Supporting member, 13...Mast, 15...Mounting bolt, 12...Exterior cylinder, 14
... Board, 17 ... Support shaft, 24 ... Handle, 2
0... Adjustment nut.

Claims (1)

[Claims] 1 The lower back of the parabolic reflector is pivoted to the front of the adjustment plate, and both ends of the support member with a turnbuckle are pivoted to the upper back of the parabolic reflector and the rear of the adjustment plate, and externally fitted to the upper end of the mast. The adjustment plate is placed rotatably around a support shaft erected at the center of the board on a disk-shaped base plate fixed to the upper end surface of the outer cylinder onto which the mounting bolts are screwed onto the side wall. A device for adjusting the installation angle of a parabolic reflector, characterized in that the tip of a handle that cannot be moved forward or backward can be screwed into an adjustment nut that is rotatably held and that can be attached to multiple locations on the outer peripheral surface of a substrate.