JPH07202543A - Antenna support adjusting mechanism - Google Patents

Abstract

PURPOSE:To provide the antenna support adjusting mechanism where the elastic displacement of an antenna and supporting bolts is suppressed by adjustment of lengths and angles of adjusting bolts which support the antenna at the time of alignment adjustment of the antenna. CONSTITUTION:An adjusting bolt 20 to support an antenna 1 consists of a ball joint whose rotation angle can be adjusted and expansible joints 11 and 15 which have the same length with the ball joint 8 as the center and have lengths adjusted by the bolt, and the antenna 1 is supported by four adjusting bolts. The number of joints of the adjusting bolt 20 is increased to prevent the degradation in angle adjustment precision of the antenna 1 and the reduction of the strength of the adjusting bolt 20 which are caused by elastic displacement of the antenna 1 and the adjusting bolt 20 at the time of angle adjustment of the antenna 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an azimuth angle of an antenna,
The present invention relates to an antenna support adjustment mechanism for performing alignment adjustment in the elevation direction.

[0002]

2. Description of the Related Art FIG. 9 is a sectional view showing a conventional antenna support adjusting mechanism. In the figure, 1 is an antenna,
2 is the antenna mounting surface that is the base for mounting the antenna,
3 is a ball having a spherical curved surface, 4 is a first shaft in which one shaft end is fixed to the ball 3 and the other shaft end is a bolt, and 5 is in contact with the spherical surface of the ball 3 to fix the rotation of the ball. Clamp, 6 is for tightening the clamp 5 and the ball 3
Bolt for stopping the rotation of the first bolt, 7 is a first nut for tightening the clamp 5 together with the first bolt 6, 8 is a ball 3,
A ball joint composed of the clamp 5, the first bolt 6, the first nut 7, and the first shaft 4, 9 is a second bolt attached to the shaft of the first shaft 4 opposite to the ball 3. 10 is a second nut for fastening the second bolt 9,
Reference numeral 11 is an expansion joint that is composed of a second bolt 9 and a second nut 10, and that adjusts the length of the shaft 4.
Is an adjustment knob for rotating the first shaft 4 with a spanner to adjust the length of the expansion joint 11, 23 is a first flange for fixing the first bolt 6 to the antenna 1, and 18 is a first flange 23. Screws for fixing to the antenna, 19 are screws for fixing the second nut 10 to the antenna mounting surface 2, and 34 is an adjusting bolt including the above-mentioned components. FIG. 10 is a conceptual diagram of the antenna support adjustment mechanism. In the figure, four adjusting bolts 34 are arranged between the antenna 1 and the antenna mounting surface 2 to support the antenna 1.

Next, the operation will be described. The first nut 7 in FIG. 9 is turned counterclockwise to loosen the clamping force of the clamp 5 so that the ball 3 of the ball joint 8 can freely rotate. Next, the adjustment bolt 16 is rotated to rotate the second bolt 9 and adjust the length of the first expansion joint 11, thereby changing the length and angle of the adjustment bolt 34 and adjusting the angle of the antenna 1. For example, in FIG. 11, the radio wave E output from the horn 44 of the antenna 1a before the angle adjustment is reflected by the target 45 in the direction of,
It returns to the horn 44 with a weak electric wave. At this time, the antenna 1a
Is rotated in the direction of elevation angle B, and the angle of the antenna 1 in the elevation angle direction is adjusted as shown in FIG. 10 so that the reflected wave D of the output radio wave C of the horn 44 returns to the horn 44 with the strongest radio wave. In FIG. 10, the length of the expansion joint 11 of the adjusting bolts 34 at the positions a and b is extended to adjust the adjusting bolts 34 at the positions c and d.
By shortening the length of the expansion joint 11 of, the antenna 1 is rotated in the direction of the elevation angle B with respect to the antenna mounting surface 2 to adjust the angle of the antenna. The angle adjustment is similarly performed for the direction of the azimuth angle direction a. After the adjustment, turn the first nut 7 in Fig. 9 clockwise and clamp 5
Tighten, fix the ball joint 8, and turn the rotation stop nut 21 to the right to fix the expansion joint 11.

[0004]

Since the conventional antenna support adjusting mechanism is constructed as described above, for example, FIG.
If the adjusting bolt 34c at the position 0 of 0 is connected to the position f as shown in FIG. 12 before the angle adjustment of the antenna 1, the lengths of the positions a and f of the antenna 1a before the adjustment are long. The length k is equal to the length 1 at the positions a and c of the adjusted antenna 1. In addition, the mounting surface 2 of the antenna 1 and i
Since the adjustment bolt 34c at the position of is vertical,
Is there a deflection δ in the adjusting bolt 34c as in 2a?
Alternatively, distortion ε is generated in the antenna 1 as shown in FIG. 12b. Therefore, the antenna 1 is elastically deformed and the surface accuracy of the antenna 1 is deteriorated, so that the gain of the antenna is lowered, or stress is generated inside the antenna and the strength of the antenna is lowered. Further, due to the elastic deformation of the adjusting bolt 34, stress is generated in the adjusting bolt 34, and the adjusting bolt 34
The strength of the antenna decreases, or the antenna angle adjustment is likely to be incorrect during long-term use. Further, the deflection δ of the adjusting bolt 34 and the strain ε of the antenna 1 are
When the angle of the antenna 1 is adjusted to such an extent that it does not affect the antenna 1 and the adjustment bolt 34 with high accuracy, the adjustment angle becomes small and it becomes necessary to increase the accuracy of the antenna mounting surface, which tends to increase the cost. is there. In addition to this, there is a problem that the stress generated by the deflection δ and the strain ε causes resistance during the angle adjustment by the adjustment bolt 34, which makes adjustment difficult.

The present invention has been made in order to solve the above problems, and the bending of the adjusting bolt and the distortion of the antenna do not occur at the time of adjusting the angle of the antenna, so that the strength of the adjusting bolt and the antenna decrease and the accuracy deteriorates. The purpose of the present invention is to obtain an antenna support adjustment mechanism that does not cause noise.

[0006]

SUMMARY OF THE INVENTION In an antenna support adjusting mechanism according to the present invention, an adjusting bolt having a first expansion joint and a second expansion joint connected to both ends of a ball joint is provided on the surface of an antenna and an antenna mounting surface. Four are arranged.

Further, one end of the ball joint is fixed to the antenna, the other end of the ball joint is connected to the first expansion joint, and the two adjusting bolts having the slide rails connected to the first expansion joint are slid in the direction of sliding. They are arranged on a diagonal line of a rectangular parallelepiped so as to be orthogonal to each other, a slide rail that can slide in two directions is connected to the other adjusting bolt, and the conventional adjusting bolt is used for the other adjusting bolt. .

Further, by bending the leaf spring into a U-shape and passing bolts through holes at both ends of the spring and fixing it with nuts,
The adjustment bolt is configured and attached to the antenna and the antenna mounting surface.

[0009]

Since the antenna support adjusting mechanism according to the present invention is configured as described above, the lengths of the first expansion joint and the second expansion joint are equal for any two of the four adjustment bolts. Since the distance between the adjustment bolt and the antenna and the ball joint is equal to the distance between the adjustment bolt and the antenna mounting surface and the distance between the ball joint, the intersection of the adjustment bolt and the antenna mounting surface, and another adjustment bolt and the antenna mounting surface. Since the distance between the intersection of the adjustment bolt and the antenna and the distance between the intersection of the adjustment bolt and the antenna and the intersection of another adjustment bolt and the antenna are equal, there is an action to prevent the elastic deformation and residual stress due to the deflection of the adjustment bolt of the antenna and the distortion of the antenna. .

Further, regarding the antenna support adjusting mechanism in which the slide rail is connected to three of the four adjusting bolts and the conventional adjusting bolt is used for the remaining one, between the arbitrary two adjusting bolts, Since the link is configured by the first expansion joint, the two ball joints, and the slide rail, it has an action of preventing internal stress and elastic deformation due to distortion of the antenna and bending of the adjustment bolt.

Further, in the antenna support adjusting mechanism using the U-shaped bent leaf spring, since the adjusting bolt itself uses the elastic body, it has an action of preventing the distortion of the antenna.

[0012]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 to 11 are exactly the same as conventional ones, 12 is a second shaft fixed to the first bolt 6, 13 is a third bolt attached to the axial end of the second shaft 12, Reference numeral 14 is a third nut for fastening the third bolt 13 to the antenna 1, and 15 is a second expansion and contraction composed of the second shaft 12, the third bolt 13, and the third nut 14. A joint, 17 is an adjusting knob for rotating the second shaft 12 with a spanner to adjust the length of the second expansion joint 15, 18 is a screw for fastening the third nut 14 to the antenna 1, and 19 is a second screw. A screw for fastening the nut 10 to the antenna mounting surface 2, 21 is a first expansion joint 11
, A detent nut 22 for fixing the second expansion joint 15, and a detent nut 20 for fixing the second expansion joint 15.
The adjustment bolt comprised from 1, 22 is shown. FIG. 2 is a conceptual diagram showing the present invention. In the figure, four adjusting bolts 20 are arranged between the antenna 1 and the antenna mounting surface 2 to support the antenna 1.

In the adjusting mechanism constructed as described above, the first nut 7 shown in FIG. 1 is rotated counterclockwise to loosen the tightening force of the clamp 5 so that the ball 3 of the ball joint 8 can freely rotate. . Then, the adjustment knob 16 is rotated to rotate the second bolt 9 to adjust the length of the first expansion joint 11, and at the same time, the adjustment knob 17 is rotated to rotate the third bolt 13, By adjusting the second expansion joint 15 so that it has the same length as the expansion joint 11, the length and angle of the adjustment bolt 20 are changed to adjust the angle of the antenna 1. For example, in FIG. 2, the length 1 between the intersection of the adjusting bolt 20 and the antenna 1 and the rotation center of the ball joint 8 and the length m between the intersection of the adjusting bolt a20 and the antenna mounting surface 2 and the rotation center of the ball joint 8. And the angle of the antenna 1 is adjusted by adjusting the length of the adjusting bolt 20. At this time,
Since the length x and the length y are equal, elastic deformation does not occur between the adjusting bolt a20 and the antenna 1. After adjusting the length of the adjusting bolt a20, turn the first nut 7 in FIG. 1 to the right to tighten the clamp 5 to fix the ball joint 8, and turn the rotation stop nut 21 to the right to fix the expansion joint 11. Then, turn the anti-rotation nut 22 clockwise to the expansion joint 1
Fix 5

Example 2. A sectional view of the adjusting bolt of this embodiment is shown in FIG. 3a. In the figure, 1 to 11, 18, 19,
21 is the same as that of the first embodiment, 23 is a first flange for fastening the first bolt 6 to the antenna 1, and 24 is a second flange which is connected to the second nut 10 and fastened to the antenna mounting surface 2. Is a slide shaft fixed to the second nut 10 and connected to the second flange so as to be slidable in one direction parallel to the antenna mounting surface 2.
Is a slide groove having a space in which the slide shaft 25 can slide, 27 is a slide rail fixed to the second flange 24 and composed of the slide shaft 25 and the slide groove 26, and 28 is a slide rail 27 of the slide rail 27 due to an axial force of a screw. An adjustment screw for adjusting the amount of sliding of the slide shaft 25 is shown, 29 is an adjustment bolt of this embodiment, and the cross section AA of FIG. 3b shows the slide shaft 25 and the slide groove 26 as seen from the break line AA of FIG. 3a. FIG. Also, FIG.
4a shows a sectional view of the adjusting bolt C of the present embodiment, FIG. 4b shows a sectional view of FIG. 4a taken along the broken line BB, and FIG. 4c shows a sectional view of FIG. 4b taken along the broken line cc. In the figure, 1
Up to 11, 18, 19, 21, 21, 25 and 26 are the same as the adjusting bolt b29, 30 is a slide rail composed of the slide shaft 25 and the slide groove 26, and 32 is a space in which the slide rail 30 can slide. The slide grooves shown are 31, slide rails 30 and slide grooves 32.
The slide rail 30 is composed of and, and the slide rail 30 is slidable in one direction parallel to the antenna mounting surface 2 and orthogonal to the sliding direction of the slide shaft 25, and 33 is an adjusting bolt c including the above-mentioned components. FIG. 5 shows a conceptual diagram of this embodiment. In the figure, two adjusting bolts 29, one adjusting bolt 33, and an adjusting bolt 34 of a conventional antenna support adjusting mechanism are provided between the antenna 1 and the antenna mounting surface 2. 1 is placed and the adjustment bolts b29 are arranged so that the sliding directions of the slide shafts 25 of the slide rails 27 are orthogonal to each other on the diagonal lines of the four corners of the rectangle that is the antenna supporting position of the antenna 1, The adjustment bolt c33 and the adjustment bolt d34 are arranged at the four corners of the square, and the antenna 1 is supported. FIG. 6 is a diagram showing the operation of the slide rails 27 and 33.

In the antenna support adjusting mechanism constructed as described above, the ball joint 8 of the adjusting bolt d34 shown in FIG.
Is the same as the conventional adjusting bolt 34. Next, adjust the adjusting bolt 29 by loosening the adjusting screw 28 of FIG. 3a so that the slide shaft 25 of the slide rail 28 can freely slide. Like the bolt 34, the ball joint 8 is allowed to rotate freely, the length of the first expansion joint 11 is adjusted, and then the other adjustment bolts 29 are also adjusted in length in the same manner.
Regarding the adjusting bolt 33, the length of the first expansion joint 11 is adjusted in the same manner as the conventional adjusting bolt 34 to adjust the angle of the antenna 1. At this time, for example, as shown in FIG. 6, one of the adjusting bolts 29 slides in the direction of E, and at the same time, the adjusting bolt 33 slides in the direction of E and the other adjusting bolt 29 moves in the direction of E. Simultaneously with sliding to, the adjusting bolt 33 slides in the direction of to.

Thus, the two adjusting bolts 29 are
By being able to slide in the directions orthogonal to each other and the adjusting bolt 33 to be simultaneously slid in each of the two directions in which the adjusting bolt 29 slides, the adjusting bolt 29, the adjusting bolt 34, the antenna 1 and the antenna mounting surface are shown as shown in FIG. 5b, for example. The ball joint 8, the expansion joint 11, and the slide rail 27 form a link mechanism between the two, and when the length of the adjustment bolt 29 is r, the antenna 1 is The ball joint 8 and the slide rail 27 rotate freely without being restricted in rotation, and at this time, the length w between the intersection of the antenna mounting surface 2 and the adjusting bolt b29 and the intersection of the antenna mounting surface 2 and the adjusting bolt 34 is Antenna 1 and adjusting bolt 29
Since the length freely changes regardless of the length v between the intersection of the antenna 1 and the intersection of the antenna 1 and the adjustment bolt d34, the adjustment bolt 2
9b and the antenna 1 do not change elastically. After adjusting the angle of the antenna, for each of the adjustment bolt b29, the adjustment bolt d34, and the adjustment bolt c33, turn the first nut 7 to the right to tighten the clamp 5 to fix the ball joint 8, and turn the rotation stop nut 21 to the right. Then, the expansion joint 11 is fixed, and the adjusting screw 28 is rotated to fix the slide shaft 25 to the antenna mounting surface.

Embodiment 3. FIG. 7 shows a sectional view of the adjusting bolt of this embodiment. In the figure, 1 and 2 are the same as those of the conventional antenna support adjusting mechanism, 35 is a leaf spring formed by bending a rectangular metal plate into a U shape in the rectangular longitudinal direction, and 36 is one at each end of the leaf spring in the longitudinal direction. Two open holes, 37 are bolts passed through the holes 36 at both ends, 38 is a plate spring 36 together with the bolt 37 and adjusts the bending amount of the U-shaped bending of the plate spring 36, and 39 is the plate spring 36. A flange for attaching one end in the longitudinal direction to the antenna 1, 40 is a flange for attaching the other end in the longitudinal direction of the leaf spring 36 to the antenna mounting surface 2, 4
Reference numeral 1 is a screw for fixing the flange 39 and the flange 40 to the leaf spring 36, 42 is a detent nut for suppressing looseness of the bolt 37 and the nut 38, and 43 is an adjusting bolt including the above-mentioned components. 8 is a conceptual diagram showing the present invention,
In the figure, four adjusting bolts 43 are arranged between the antenna 1 and the antenna mounting surface 2 to support the antenna 1.

In the antenna support adjusting mechanism constructed as described above, the bending condition of the leaf spring 35 is adjusted by tightening or loosening the bolt 36 and the nut 38 to adjust the length between the antenna 1 and the antenna mounting surface 2. Adjust the angle.
At this time, since the adjusting bolt 43 flexes with elasticity,
The antenna 1 is not elastically deformed. After the adjustment, the detent nut 42 is tightened to fix the length of the antenna adjustment bolt 43.

[0019]

Since the present invention is configured as described above, when adjusting the angle of the antenna by adjusting the length and angle of the adjusting bolt, the number of joints of the adjusting bolt is increased, or By using the elastic material for the adjusting bolt itself, it is possible to prevent the deterioration of the angle adjustment accuracy of the antenna caused by the elastic deformation of the adjusting bolt and the antenna, and to prevent the strength of the antenna and the adjusting bolt from decreasing.

[Brief description of drawings]

FIG. 1 is a sectional view of an adjusting bolt a according to a first embodiment of the present invention.

FIG. 2 is a conceptual diagram of an antenna support adjustment mechanism according to the first embodiment of the present invention.

FIG. 3 is a sectional view of an adjusting bolt b according to a second embodiment of the present invention.

FIG. 4 is a sectional view of an adjusting bolt c according to a second embodiment of the present invention.

FIG. 5 is a conceptual diagram of an antenna support adjusting mechanism according to a second embodiment of the present invention.

FIG. 6 is a diagram showing an operation of the antenna support adjusting mechanism according to the second embodiment of the present invention.

FIG. 7 is a sectional view of an adjusting bolt according to a third embodiment of the present invention.

FIG. 8 is a conceptual diagram of an antenna support adjusting mechanism according to a third embodiment of the present invention.

FIG. 9 shows a sectional view of a conventional adjusting bolt d.

FIG. 10 shows a conceptual diagram of a conventional antenna support adjustment mechanism.

FIG. 11 is a conceptual diagram showing an operation of a conventional antenna support adjusting mechanism.

FIG. 12 is a diagram showing elastic deformation of a conventional antenna support adjustment mechanism.

[Explanation of symbols]

 1 Antenna 2 Antenna Mounting Surface 3 Ball 4 First Shaft 5 Clamp 6 First Bolt 7 First Nut 8 Ball Joint 9 Second Bolt 10 Second Nut 11 First Expansion Joint 12 Second Shaft 13 Third bolt 14 Third nut 15 Second expansion joint 16 Adjustment knob 17 Adjustment knob 18 Screw 19 Screw 20 Adjustment bolt 21 Detent nut 22 Detent nut 23 First flange 24 Second flange 25 Slide shaft 26 Slide groove 27 Slide rail 28 Adjusting screw 29 Adjusting bolt 30 Slide rail 31 Slide rail 32 Slide groove 33 Adjusting bolt 34 Adjusting bolt 35 Leaf spring 36 Hole 37 Bolt 38 Nut 39 Flange 40 Flange 41 Screw 42 Non-rotating nut 43 Adjusting bolt 44 Antenna horn 45 Target

Claims (3)

[Claims] 1. A first shaft having a spherical ball at one shaft end, a clamp for fixing the rotation of the ball in contact with the spherical surface of the ball of the first shaft, and a ball clamped to fix the ball. A ball joint consisting of a first bolt and a first nut for fixing, and a second bolt attached to the shaft end of the first shaft opposite to the ball,
A second nut for fastening the second bolt to the antenna mounting surface, a first expansion joint for adjusting the length of the first shaft, and a first nut fixed to the first bolt. It consists of a third bolt attached to the axial end of the second shaft and a third nut for fastening the third bolt to the antenna, and a second expansion and contraction for adjusting the length of the second shaft. An antenna supporting and adjusting mechanism characterized in that a predetermined number of adjusting bolts each having a joint are arranged between an antenna and an antenna mounting surface. 2. A ball joint, a first expansion joint, a first flange for fixing the first bolt to the antenna, and a second nut for connecting the second nut of the first expansion joint to the antenna mounting surface. A second flange, a slide shaft fixed to the second nut and slidable in only one direction with the second flange, a slide groove having a space in which the slide shaft can slide, fixed to the second flange And a slide rail that slides a slide shaft including a slide groove, are arranged so as to be orthogonal to each other with respect to the sliding direction, and are arranged diagonally to the antenna support points at the four corners of the rectangle of the antenna. One adjustment bolt, a ball joint similar to the above adjustment bolt, a first expansion joint, a first flange,
A second adjusting bolt having a second flange and a slide shaft, the second adjusting bolt including a slide rail capable of simultaneously sliding the second nut in two directions, and the second nut of the first adjusting bolt. An antenna support adjusting mechanism characterized in that a third adjusting bolt directly fixed to the antenna mounting surface is arranged at two other points of the antenna supporting point. 3. A leaf spring formed by bending a rectangular plate into a U shape,
There are two holes, one at each end of the leaf spring, and a bolt that penetrates the leaf spring through the two holes, the head of the bolt hits the hole on one side, and the screw part of the bolt comes on the other side. An antenna supporting and adjusting mechanism characterized in that it is supported by four adjusting bolts composed of nuts for adjusting the deflection of leaf springs in combination with the bolts.