JPS62266901A - Mechanism for adjusting elevating angle of reflector antenna - Google Patents

Abstract

PURPOSE:To obtain an elevating angle adjusting mechanism where an operating torque of a handle for the elevating angle is reduced and the processing is facilitated by devising the mechanism that a rotary shaft is swung around a tilted member fitted to a horizontal base within the vertical plane including the shaft center of a reflector antenna. CONSTITUTION:In turning the elevating angle handle 8 to the right, the rotary shaft 10 is driven to the right, a screw 11 is projected from the lower side of the tilt member 40 and the rear part of a horizontal member 2B of a bearing 30 goes down. Since the front part of the horizontal member 2B is supported to the shaft 4, the horizontal member 2B is tilted downward in the rear direction around the shaft 4 by an angle alpha, and the reflector antenna is tilted upward. The lower part of the rotary shaft 10 is held around the tilted member 40 and a bearing 30 at the head is swung around a half shaft 33B, then the rotary shaft 10 is tilted inward by an angle beta within the vertical plane including the axial center of the reflector antenna. Thus, no side pressure is exerted to the shaft 10 and only an axial torque is given to a screw hole 40B and a thread of the screw 11, the elevating angle is adjusted without increasing the torque of the handle 8.

Description

[Detailed Description of the Invention] [1 Already Required] In a reflector antenna installed on a tower so that the azimuth angle and the elevation angle can be adjusted, the elevation angle is adjusted by operating the elevation angle handle and rotating the rotation axis. In doing so, by creating a structure in which the rotation axis can swing in a vertical plane that includes the axis of the reflector antenna, using a tiltable member attached to a horizontal base as a fulcrum, the angle of elevation required for adjustment of the elevation angle can be adjusted. To provide a depression/elevation angle adjustment mechanism that allows easy operation of a handle and is easy to process.

[Industrial application field]

The present invention (i) relates to an improvement in the elevation angle adjustment mechanism of a reflector antenna.

A relatively small reflector antenna of a wireless device employs means for manually adjusting the azimuth angle and the elevation angle.

The elevation angle adjustment mechanism of such a reflector antenna includes:
It is desired that the operating force is small and that processing is easy.

[Conventional technology]

FIG. 3 is a configuration diagram of a conventional example, and FIG. 4 is a side sectional view of a main part of the conventional example.

As shown in FIG. 3, a horizontal base 5 is installed on the top of the tower 6 installed outdoors, and a support frame 2' is attached to the top of the horizontal base 5.
In addition to the vertical members of the support frame 2, a reflector antenna 1 is attached so as to be oriented in the horizontal direction.

The horizontal base 5 is attached to the upper member of the tower 6 via an azimuth adjustment mechanism configured on the upper part of the tower 6, and the horizontal base 5 is attached to the upper member of the tower 6.
is attached to the upper part of the horizontal base 5 via an elevation adjustment mechanism.

Although the azimuth angle adjustment mechanism is not shown, by rotating the azimuth angle handle 7 attached to the end of a horizontally attached shaft, the horizontal base 5 is rotated about the vertical axis and is supported. Frame 2
That is, the reflector antenna 1 is configured to rotate within a horizontal plane.

The elevation adjustment mechanism is mounted on the support frame 2 as shown in detail in Fig. 4.
A shaft 4 is horizontally attached to the end of the reflector antenna 1 side, that is, the front part of the support frame 2, and a support member 3 is vertically fixed to one end of the horizontal base 5. This shaft 4 is pivotally supported.

Rotating shaft 10 with a handle 8 for elevation and elevation angle attached to the middle of the shaft part
is held vertically by screwing the lower threaded part 11 into the screw hole 15 of the horizontal base 5, and has a bearing part 20 on the head to support the rear part of the support frame 2. be.

The bearing part 20 includes a ball 21 formed on the head of the rotation shaft 10,
It consists of a receiving member 22 which is fixed to the lower part of the rear part of the support frame 2 and has a hemispherical recess formed in the lower surface into which the ball 21 is inserted.
After the ball 21 is inserted into the recess, a presser plate 23 is attached to the bearing member 22 so that the ball 21 does not come off from the recess.

Since the bearing portion 20 as described above is formed on the head of the rotating shaft 10, the rotating shaft 10 rotates when the elevation angle handle 8 is operated. When the rotation shaft 10 rotates as desired, the bearing portion 20 moves up and down as desired. Therefore, the support frame 2 is tilted about the axis 4, and the angle of elevation of the reflector antenna 1 can be adjusted.

At this time, even if the rotating shaft 10 rotates, the outer peripheral surface of the ball 21 and the inner surface of the recess of the bearing member 22 slide, so the bearing member 2
2 does not rotate. That is, the bearing portion 20 has a spherical bearing function.

[Problem that the invention seeks to solve]

However, the above-mentioned conventional elevation angle adjustment mechanism
There is a problem in that it is difficult to process the hemispherical recess and the ball 21 on the head of the rotating shaft 10.

Furthermore, due to this difficult machining, there is a problem in that the frictional force between the ball 21 and the bearing member 22 is large, resulting in poor bearing performance.

In addition, since the rotating shaft 10 is vertically screwed and held by the horizontal base 5, when the elevation angle becomes large, the weight of the support frame 2 is applied to the ball 21 at the head of the rotating shaft 10 from diagonally above. will be done. For this reason, a force is applied to the rotating shaft 10 that causes it to fall, and the threaded portion between the threaded portion 11 and the threaded hole 15 hits unevenly, resulting in a problem in which a large force is required to operate the elevation angle handle 8. There is a point.

Furthermore, since the bearing section 20 is a spherical bearing mechanism, the supporting direction is unstable. Therefore, if the weight of the support frame 2° reflector antenna 1, etc. is eccentric, a biased load will be applied to the shaft 4, making rotation unsmooth, and the elevation angle handle 8
requires more force to operate.

[Means for Solving the Problems] In order to solve the above conventional problems, the present invention provides that the bearing part of the head is seated on the rear part of the horizontal member 2B of the support frame to which the reflector antenna is attached, and the threaded part 11 is screwed into a screw hole provided in the horizontal base 5, and the rotation shaft 10 held substantially perpendicular to the horizontal base 5 is rotated as desired by operating the elevation angle handle 8. This is an improved device as shown in FIG. 1, which allows adjustment of the elevation angle of a reflector antenna.

That is, the bearing part 30 is brought into contact with a ring 31 having a rectangular cross section fixed to the head of the rotation shaft 10, and a semicircular groove 33A into which the half of the ring 31 is inserted and allows rotation in a horizontal plane. A pair of clamping members 33 and horizontal member 2B on the mating surfaces
The half-split shaft portions 33B that protrude from both sides of the clamping member 33 are joined together to form a shaft, and the integrated clamping member 33 is fixed to the rear of the horizontal member 2B that is swingably supported. A pair of side plates 34 are provided.

Then, the lower part of the rotation shaft 10 is screwed into and held in the screw hole 40B of the tilting member 40 that is swingably mounted on the horizontal base 5, and the angle of elevation and elevation of the reflector antenna is adjusted. In a vertical plane including the axis, the rotation axis 10
is configured to swing around the tiltable member 40 as a fulcrum.

[Effect]

According to the means of the present invention, even when the angle of elevation of the reflector antenna is increased, the rotation shaft 10 swings in a vertical plane including the axis of the reflector antenna with the tilting member 40 as a fulcrum. Only an axial force is applied to the threaded portion between the hole 40B and the threaded portion 11. therefore,
The operating force for the elevation angle handle 8 is not particularly large, and the elevation angle can be easily adjusted.

The bearing portion 30 also includes a ring 31, a holding member 33 having a semicircular groove 33A into which the ring 31 is slidably inserted, and a circular pivot support that pivots a half shaft portion 33B that is integrated into a shaft shape. It is composed of a side plate 34 having a hole, and since all the components are easy to process, the frictional force of the sliding part is small.

〔Example〕

The present invention will be specifically described below with reference to the drawings. Note that the same reference numerals indicate the same objects throughout the figures.

FIG. 1 is a sectional view of one embodiment of the present invention, and FIG. 2 is a perspective view showing the bearing portion of one embodiment of the present invention in separated form.

As shown in FIG. 3, the reflector antenna according to the present invention is provided with a horizontal base 5 mounted on the top of a tower 6 installed outdoors so as to be able to adjust the azimuth angle, and on the top of the horizontal base 5, the elevation angle can be adjusted. The support frame 2 is attached to the vertical member 2A of the support frame 2 via a mechanism so as to be oriented substantially horizontally, which is substantially the same as in the conventional case.

In FIG. 1, a rotating shaft 10 with an elevation angle handle 8 mounted in the middle of the shaft is screwed into a screw hole 40B provided at the center of a tilting member 40 whose lower part is attached to a horizontal base 5. It is maintained as such.

The tiltable member 40 has a desirably thick rectangular parallelepiped shape, and is provided with protruding shafts 40A on opposing sides. A pair of holding plates 41 that pivotably support the tilting member 40 have an inverted cross section, and have a hole in the vertical member for pivotally supporting the protruding shaft 40A, and a hole in the horizontal base 5 that is opposite to the square hole in the horizontal base 5. They are fixed to the inner surface facing each other.

The tilting member 40 is inserted almost horizontally between the pair of holding plates 41, and the protruding shaft 40A is inserted into the hole of the holding plate 41 and is pivotally supported. At this time, the protrusion shaft 40A is
The holding plate 41 shall be assembled so as to be parallel to the axis 4 of.

The details of the bearing part 30 configured on the upper part of the rotation shaft 10 are as follows.
It is configured as shown in the figure.

That is, the head of the rotating shaft 10 has a stepped end surface, a ring 31 having a rectangular cross section and a desirably larger outer diameter than the outer diameter of the rotating shaft 10 is fitted onto the head, and the pin 32 is inserted into the ring. 31, the rotating shaft 10 is passed through and fixed.

A pair of holding members 33 are rectangular parallelepiped-shaped and have half-split shaft portions 33B on the mating surfaces of both longitudinal end surfaces, and a half of the ring 31 is inserted into the center of the mating surfaces facing each other, and the half of the ring 31 is slidable. A semicircle that makes it possible? n 33 A are provided respectively.

On the other hand, the pair of side plates 34, which are attached closely to the longitudinal end surfaces of the pair of clamping members 33 with their opposing mating surfaces in close contact with each other, have a height that is higher than the height of the clamping members 33. It is a large rectangular plate.

The half shaft portion 33B is inserted into the center of the side plate 34 in a state where the half shaft portions 33B are aligned side by side to form a shaft, and a pivot hole 34A for pivotally supporting the holding member 33 is inserted into the center of the side plate 34. It is a provision.

In order to maintain the assembled condition of the ring 31, the pair of clamping members 33, and the pair of side plates 34, the top plate 35 is placed over the top of the side plate 34, and a screw hole 34B is provided in the upper end surface of the side plate 34 with a machine screw 36. It is fixed by screwing it on.

After assembling the bearing part 30 in this way, insert the bearing part 30 into the channel-shaped horizontal member 2B as shown in FIG. In this way, the side plate 34 is fixed to the horizontal member 2B. At this time, the bearing part 30 is attached to the horizontal member 2B so that the half shaft part 33B is parallel to the shaft 4 of the support frame 2.

Since the bearing portion 30 is configured as described above, the load applied to the horizontal member 2B is transferred to the side plate 34 and the half shaft portion 33B.
, is received by the rotation shaft 10 via the ring 31. On the other hand, even if the rotation shaft 10 rotates, the ring 31 and the clamping member 33 slide, so the clamping member 33, that is, the side plate 34, does not rotate. That is, the bearing portion 30 has a bearing function.

For example, when the elevation angle handle 8 is rotated clockwise to adjust the elevation angle of the reflector antenna, the rotation axis 1° is rotated clockwise, the threaded portion 11 protrudes further below the tilting member 40, and the bearing portion 30, i.e. The rear part of the horizontal member 2B is lowered. Since the front part of the horizontal member 2B is pivotally supported on the shaft 4, the horizontal member 2B
is tilted backward by an angle α about axis 4, and the reflector antenna is tilted upward. That is, the elevation angle is adjusted.

At this time, the lower part of the rotating shaft 10 is held using the tilting member 40 as a fulcrum, and the bearing part 30 of the head swings about the half shaft part 33B, so that the rotating shaft 10 can be attached to the fuller antenna. is inclined inward by an angle β in a vertical plane containing the axis of .

Therefore, no side pressure is applied to the rotating shaft 10, and only an axial force is applied to the threaded portion between the screw hole 40B and the threaded portion 11. Therefore, the operating force for the elevation angle handle 8 does not increase, and the elevation angle can be easily adjusted.

〔Effect of the invention〕

As explained above, in order to adjust the elevation angle of the reflector antenna, the present invention allows the rotation axis to swing in a vertical plane including the axis of the reflector antenna, using the tiltable member attached to the horizontal base as a fulcrum. This structure has excellent practical effects, such as reducing the operating force required for the depression/elevation angle handle to adjust the elevation/elevation angle, and facilitating machining of the bearing part.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of one embodiment of the present invention, Fig. 2 is a perspective view showing the bearing section of one embodiment of the present invention in separated form, Fig. 3 is a configuration diagram of a conventional example, and Fig. 4 is a FIG. 2 is a sectional side view of a main part of a conventional example. In the figure, 1 is a reflector antenna, 2 is a support frame, 2^ is a vertical member, 2B is a horizontal member, 4 is a shaft, 5 is a horizontal base, 6 is a tower,
7 is a handle for azimuth angle, 8 is a handle for elevation angle, 10 is a rotating shaft, 20.30 is a bearing part, 31 is a ring, 33 is a clamping member, 33A is a semicircular groove, 3
3B is a half shaft part, 34 is a side plate, 34A is a pivot hole,
35 is an upper plate, 40 is a tilting member, 40A
40B indicates a projection shaft, 40B indicates a screw hole, and 41 indicates a retaining plate 41.

Claims (1)

[Claims] The bearing part (30) of the head is seated on the rear part of the horizontal member (2B) of the support frame to which the reflector antenna is attached, and
11) has a rotation shaft (10) that is screwed into a screw hole provided in the horizontal base (5) and is held almost perpendicularly to the horizontal base (5), and the elevation angle handle (8) is screwed into the horizontal base (5). Operate the rotation axis (
10), in which the bearing portion (30) is connected to a ring (31) fixed to the head of the rotation shaft (10) and a mating surface. a pair of clamping members (33) having a semicircular groove (33A) into which the half of the ring (31) is rotatably inserted;
It is fixed to the rear part of the horizontal member (2B), and the clamping member (3
3) consists of a pair of side plates (34) pivotably supported in a state where the sides are aligned, and the lower part of the rotation shaft (10) is
A tilting member (4) is swingably mounted on the horizontal base (5).
0) is screwed and held in the screw hole (40B) of the reflector antenna, and when adjusting the elevation angle of the reflector antenna, the rotation axis (1
0) is capable of swinging about the tiltable member (40) as a fulcrum.