JPS6338566Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for adjusting the installation angle of a parabolic reflector.

An offset parabolic reflector antenna is used to receive SHF radio waves, 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 accurate. Must.
However, in many conventional devices of this type, an outer tube is attached to the upper end of the mast, and the outer tube is vertically attached to a board on which a parabolic reflector is attached. Although the mounting bolts on the side wall are tightened, it is quite difficult to tighten them evenly with multiple mounting bolts, and furthermore, the tip of the mounting bolt does not necessarily contact the outer circumferential surface of the mast perpendicularly, so the mast When screwing in, the parabolic reflector rotates slightly from its best orientation, reducing 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, this invention aims to make the azimuth of parabolic reflector installation accurate and easy.
An adjustment plate equipped with a parabolic reflector is rotatably mounted on a horizontal board fixed to the upper end surface of the outer cylinder that is externally fitted and screwed onto the upper end of the mast, and the tip of the handle supported on the adjustment plate is It is screwed onto an adjustment nut rotatably held on the outer peripheral surface of the board, and a fixing device is screwed onto the support shaft. 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 the adjusting nut held on the outer circumferential surface is screwed together, and the adjusting plate is further fixed by a single fixing device screwed onto the support shaft.

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.

A bent support plate 18 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 20 with a thread 19 carved at the tip is inserted horizontally. A flat washer 21 is externally fitted to the support portion, and a cotter pin 22 is inserted into the shaft portion of the handle 20 to protrude, so that the handle 20 is rotatable and cannot move forward or backward relative to the adjustment plate 1. on the other hand,
A bracket 23 bent into an arc shape is fixed to the side wall 16 of the substrate 14, and a cylindrical adjustment nut 24 is rotatably fitted to the arc portion of the bracket 23, and a horizontal screw thread is attached to the center of the adjustment nut 24. 25, and the screw thread 19 at the tip of the handle 20 is screwed into the handle.

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 20 of the adjustment plate 1 and the adjustment nut 24 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 handle 20 is rotated to the right or left to slightly move the adjustment plate 1 with respect to the stationary substrate 14 to finely adjust the azimuth of the parabolic reflector 3, determine the azimuth, and move the washer 26 to the support shaft 17. The adjusting plate 1 is attached to the base plate 14 by screwing the fixing bolt 27 onto the support shaft 17.
Fixed against. Note that instead of the fixing bolt 27, a threaded bolt is erected on the support shaft 17, and the washer 26
may be externally fitted onto the support shaft 17 and fixed by screwing a fixing nut onto a threaded bolt. 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.

In the present invention, as described above, the lower back surface of the parabolic reflector is pivoted to the front of the adjustment plate, and both ends of the support member with the turnbuckle interposed 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. A parabolic reflector is mounted on the adjustment plate, and the tip of the handle is rotatably provided on the adjustment plate, and the tip of the handle is screwed into an adjustment nut rotatably held on the outer circumferential surface of the substrate, and a rotation device is screwed onto the support shaft. This is an installation angle adjustment device that determines the azimuth angle of the parabolic reflector relative to the satellite by rotating an adjustment plate on which a parabolic reflector is attached on a fixed horizontal board. Since this is done by screwing together the supported handle and the adjustment nut held on the outer peripheral surface of the substrate, the installation angle of the parabolic reflector can be set accurately and easily. In addition, after the fine adjustment of the azimuth angle is completed, the adjustment plate is fixed with a single fixing device screwed onto the spindle, which is the center of rotation of the adjustment plate, so multiple fixing devices are required on the circumference to fix the adjustment plate. It is extremely easy to operate compared to those with bolts.

[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 taken from FIG. 1, and FIG. 7 is an enlarged vertical cross-sectional view of the main part. 3... Parabolic reflector, 1... Adjustment plate, 9...
Turnbuckle, 5...Supporting member, 13...Mast, 15...Mounting bolt, 12...Exterior cylinder, 14
... Board, 17 ... Support shaft, 20 ... Handle, 2
4... Adjustment nut, 27... Fixing bolt (fixing device).

Claims (1)

[Scope of utility model registration request] The lower back surface of the parabolic reflector is pivoted to the front of the adjustment plate, and both ends of a support member with a turnbuckle interposed are pivotally connected to the upper back surface of the parabolic reflector and the rear of the adjustment plate, and are externally fitted to the upper end of the mast. In addition, the above-mentioned 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 bolt is screwed to the side wall, and the adjustment plate is attached to the base plate. The adjustment plate is fixed by screwing the tip of the handle, which is provided so that it cannot rotate back and forth, into an adjustment nut rotatably held on the outer peripheral surface of the board, and by screwing a fixing device onto the support shaft. A parabolic reflector installation angle adjustment device.