JPS6353724B2 - - 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 reflecting mirror is rotatably mounted, and the tip of a handle supported on the adjustment plate is screwed into an adjustment nut rotatably held on the outer peripheral surface of the substrate. In other words, the azimuth angle of the parabolic reflector relative to the broadcasting satellite is determined by rotating the adjustment plate on which the parabolic reflector is attached on a fixed horizontal board, and the fine adjustment of the azimuth angle is made using the handle supported on the adjustment plate and the board. It is characterized in that this is done by screwing together an adjustment nut held on the outer peripheral surface.

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 longitudinal ribs 4 on the back surface of a parabolic reflector 3 are pivotally mounted in 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 reflecting mirror 3 and the rear side of both side walls 2 of the adjustment plate 1. That is, the support member 5
A turnbuckle 9 is interposed between the upper support rod 7 and the lower support rod 8, and the upper end of the upper support rod 7 is placed above the vertical rib 4 of the parabolic reflector 3, and the lower end of the lower support rod 8 is placed on the side wall 2 of the adjustment plate 1. The other support members 6 are made of sheet metal with a U-shaped cross section, and have elongated holes 10 at the bottom.
is engraved on it, and the upper end is attached to the parabolic reflector 3.
A bolt 11 is inserted into the elongated hole 10 and screwed to the rear side wall 2 of the adjusting 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. The adjustment plate 1 has four circles with the same circumference centered on the support shaft 17.
Four arc-shaped long holes 18 with a center angle of 30° are made at equally divided positions.
The substrate 1 is individually carved and corresponds to the arcuate long holes 18.
Divide the circumference into four equal parts at position 4 and secure four nuts (not shown). Further, instead of fixing a nut, a tap may be carved on the substrate 14.

A bent support plate 19 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 21 having a thread 20 carved at the tip is inserted horizontally. A flat washer 22 is externally fitted to the support portion, and a cotter pin 23 is inserted into the shaft portion of the handle 21 to protrude, so that the handle 21 is rotatable and cannot move forward or backward relative to the adjustment plate 1. on the other hand,
A bracket 24 bent into an arc shape is fixed to the side wall 16 of the substrate 14, and a cylindrical adjustment nut 25 is rotatably fitted to the arc portion of the bracket 24.
A horizontal thread 26 is carved in the center of the handle 5, and the thread 20 at the tip of the handle 21 is screwed into the thread 26.

Next, the operation of this 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 21 of the adjustment plate 1 and the adjustment nut 25 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 finely adjusted by rotating the handle 21 to the right or left to slightly move the adjustment plate 1 with respect to the stationary substrate 14 to determine the azimuth and adjust the arc shape of the adjustment plate 1. Fixing bolts 27 are inserted into elongated holes 18 and screwed to fix adjustment plate 1 to substrate 14. The elevation angle of the parabolic reflector 3 can be determined by loosening the bolt 11 at the lower end of the support member 6, turning the turnbuckle 9 of the support member 5 to the right or left to extend or contract the length of the support member 5, and adjusting the length of the support member 5. In the support member 6, a long hole 10 is guided by a bolt 11, and the bolt 11 is screwed while finding the best angle of elevation.

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. This is an installation angle adjustment device for a parabolic reflector, in which the tip of the handle, which is placed on the adjustment plate so that it can be rotated forward and backward, is screwed into an adjustment nut that is rotatably held on the outer circumferential surface of the substrate. The azimuth angle of the parabolic reflector relative to the broadcasting satellite is determined by rotating the adjustment plate on which the parabolic reflector is attached on a horizontal board, and fine adjustment of the azimuth angle is performed using a handle supported on the adjustment plate and held on the outer peripheral surface of the board. Since this is done by screwing together the adjusted adjustment nut, the installation angle of the parabolic reflector can be set accurately and easily.

[Brief explanation of drawings]

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 cross-sectional 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, 21 ... Handle, 2
5... Adjustment nuts.

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 is screwed into an adjustment nut that is rotatably held on the outer peripheral surface of a substrate.