JP2705508B2 - Antenna drive range setting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an antenna driving range setting mechanism, and more particularly to an antenna driving range setting mechanism for a parabolic antenna used for satellite communication.

[0002]

2. Description of the Related Art Conventionally, in this type of antenna driving range setting mechanism, as shown in FIGS. 2 (a) and 2 (b), a cam base 11 to which cams 2a and 2b on the driving side are mounted is fixed to a fixed base. Limit switch 4 attached to plate 9
a, 4b and switch levers 5a, 5b.

Usually, a rotating shaft 14 on which a parabolic antenna (not shown) is mounted is mounted on a bearing 7 having an inner peripheral portion 7a and an outer peripheral portion 7b by a movable plate 16 connected to the rotating shaft 14.
Is rotatable by fitting the lower part of the.

Further, a cam base 11 on which cams 2a and 2b for setting an antenna driving range of a parabolic antenna are screwed into fixing holes 13 provided in a movable plate 16 to rotate a rotating shaft. It rotates following 14.

That is, when the parabolic antenna is rotated, the rotating shaft 14 also rotates, and the rotation of the rotating shaft 14 causes the cam base 11 to also rotate. Thereby, the cam base 1
The cams 2a and 2b mounted on the shaft 1 move on concentric circles of the rotary shaft 14.

The cam 2 which moves on a concentric circle of the rotating shaft 14
When a and 2b collide with the switch levers 5a and 5b, signals are sent from the limit switches 4a and 4b to a driving device (not shown) of the rotary shaft 14, and the rotation of the parabolic antenna is stopped.

When the antenna driving range is changed, the fixing bolt 12 is loosened and the fixing hole 1 of the movable plate 16 is changed.
When removed from 3, the cam base 11 and the rotating shaft 14 can be independently rotated.

In this state, the cam base 11 and the rotating shaft 1
4 are independently rotated, and the fixing bolt 12 is
The antenna driving range is changed by screwing into the other fixing holes. In addition, it is necessary to machine a fitting portion 15 for rotating the cam base 11 on the rotating shaft 14 for rotating the parabolic antenna.

[0009]

In the above-described conventional antenna driving range setting mechanism, the parabolic antenna mounted with a fitting portion for rotating a cam base on which a cam for setting the antenna driving range of the parabolic antenna is mounted. Since the antenna has to be provided on the rotating shaft, the machining for machining the rotating shaft is required. Therefore, it is very difficult to attach the antenna driving range setting mechanism to an existing antenna.

Therefore, an object of the present invention is to solve the above-mentioned problems, and it is not necessary to provide a fitting portion for rotating the cam base on the rotating shaft by machining, and the mounting portion can be easily attached to an existing antenna. An object of the present invention is to provide an antenna driving range setting mechanism.

[0011]

According to the present invention, there is provided an antenna driving range setting mechanism, comprising: a bearing for rotatably mounting an antenna; a rotatable movable plate fixed to the bearing and mounting the antenna; A range setting member that moves on a circumference around the center of rotation in synchronization with the rotation of the antenna, and a detection unit that detects that the range setting member has reached a predetermined position on the circumference. an antenna drive range setting mechanism comprising, a plurality of rollers which rotates on the outer periphery of the bearing, the range setting member mounted vital inner diameter and equipped with a ring-shaped member on diameter or of the movable plate, wherein It is attached to a mounting member and rotates on the outer periphery of the bearing to separate the mounting member independently of the movable plate.
A plurality of rollers to be rotatable, and a fixing member for synchronizing the rotation of the mounting member and securing said mounting member to said movable plate to rotation of the movable plate.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. 1A is a plan view including a partial cross section of one embodiment of the present invention, and FIG. 1B is a side view including a partial cross section of one embodiment of the present invention.

The cam base 1 rotatably supports each of rollers 8a to 8d abutting on the outer periphery of the bearing 7, and is rotatable with respect to the bearing 7 by these rollers 8a to 8d. The cam base 1 has cams 2a and 2b mounted on the driving side, and fixing bolts 3
Is fixed to the movable plate 6 by being screwed into the fixing hole 10 of the movable plate 6.

The movable plate 6 is fixed to the inner peripheral portion 7a of the bearing 7 so as to be rotatable. The movable plate 6 is rotatably driven by a driving device (for example, a motor or the like) (not shown). (Not shown). Here, the bearing 7 has an outer peripheral portion 7 b fixed to the fixing plate 9.
And an inner peripheral portion 7a rotatable with respect to the outer peripheral portion 7b by a ball disposed between the outer peripheral portion 7b.

When the movable plate 6 on which the parabolic antenna is mounted is rotated and driven by the driving device and rotated, the cam base 1 fixed to the movable plate 16 by the fixing bolt 3 also follows the rotation operation of the roller 8a. 8d to rotate on the outer periphery of the bearing 7.

At this time, the cams 2a and 2b for setting the antenna driving range of the parabolic antenna are provided on the cam base 1.
The movable plate 6 moves on a concentric circle by the rotation of.

The cams 2a, which move on concentric circles of the movable plate 6,
When 2b collides with the switch levers 5a and 5b, signals are sent from the limit switches 4a and 4b to the drive device,
The rotation of the parabolic antenna is stopped.

Here, when changing the antenna driving range, when the fixing bolt 3 is loosened and removed from the fixing hole 10 of the movable plate 6, the cam base 1 and the movable plate 6 can be independently rotated.

In this state, the cam base 1 and the movable plate 6 are independently rotated, and the fixing bolts 3 are screwed into the other fixing holes 10 of the movable plate 6, so that the cams 2a and 2b and the parabolic antenna can be moved relative to each other. Since the position changes, the antenna driving range changes.

As described above, the rotatable movable plate 6 fixed to the bearing 7 for rotatably mounting the parabolic antenna and having the rotatable parabolic antenna mounted thereon, and the center of rotation of the parabolic antenna centered on the rotation of the parabolic antenna. The cam base 1 is mounted with the cams 2a and 2b that move on the circumference and is rotatable with respect to the outer periphery of the bearing 7 by a plurality of rollers 8a to 8d that rotate on the outer periphery of the bearing 7. By fixing with the bolt 3 and synchronizing the turning operation of the cam base 1 with the turning operation of the movable plate 6,
As in the related art, there is no need for machining for providing a fitting portion for rotating the cam base 1 on the rotating shaft.

Accordingly, there is no need to provide a fitting portion for rotating the cam base 1 on the rotating shaft by machining, and the antenna range setting mechanism can be easily attached to an existing antenna (not shown).

[0023]

As described above, according to the present invention, a rotatable movable plate fixed to a bearing for rotatably mounting an antenna and having an antenna mounted thereon, and the rotation of the antenna synchronized with the rotation of the antenna. A cam that moves on a circle around the center is mounted, and a mounting member that is rotatable with respect to the outer periphery of the bearing by a plurality of rollers that rotate on the outer periphery of the bearing is fixed with a fixing member. By synchronizing the rotation of the mounting member with the rotation of the movable plate,
There is no need to provide a fitting portion for rotating the mounting member on the rotating shaft by machining, and there is an effect that it can be easily attached to an existing antenna.

[Brief description of the drawings]

FIG. 1A is a plan view including a partial cross section of one embodiment of the present invention, and FIG. 1B is a side view including a partial cross section of one embodiment of the present invention.

FIG. 2A is a plan view including a partial cross section of a conventional example,
(B) is a side view including a partial cross section of a conventional example.

[Explanation of symbols]

 Reference Signs List 1 cam base 2a, 2b cam 3 fixing bolt 4a, 4b limit switch 5a, 5b switch lever 6 movable plate 7 bearing 7a inner peripheral portion 7b outer peripheral portion 8a to 8d roller

Claims (3)

(57) [Claims] 1. A bearing for rotatably mounting an antenna, a rotatable movable plate fixed to the bearing and mounting the antenna, and the antenna on a circumference centered on a rotation center of the antenna. An antenna driving range setting mechanism comprising: a range setting member that moves in synchronization with rotation of the antenna; and a detection unit that detects that the range setting member has reached a predetermined position on the circumference. A ring-shaped mounting member on which a member is mounted and whose inner diameter is greater than or equal to the diameter of the movable plate; and the mounting member is attached to the mounting member and rotates on the outer periphery of the bearing to separate the mounting member from the movable plate independently.
Antenna, characterized in that it comprises a plurality of rollers to be rotatable, and a fixing member for synchronizing the rotation of the mounting member and securing said mounting member to said movable plate to rotation of the movable plate Drive range setting mechanism. 2. The bearing according to claim 1, wherein the bearing comprises a fixed outer member and a rotatable inner member, and the movable plate is fixed to the inner member so as to be rotatable. The described antenna driving range setting mechanism. 3. The antenna drive range setting mechanism according to claim 1, wherein the movable plate has a plurality of screw holes into which the fixed member is screwed.