JPH0256841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to a rotational drive device for an antenna device.

In fishing radio, amateur radio, etc., the location of the partner station is unspecified, and in order to clearly communicate with any station among these unspecified partner stations, it is necessary to emit a beam with directivity in the target direction. A multi-element antenna device is used with a rotary drive device.

Furthermore, in the long-distance communication band, a large number of elements are required in the antenna device in order to emit a beam with sharp directivity in the target direction, which increases the weight of the antenna device itself, and accordingly, the driving torque of the rotary drive device must be increased. Must be. Therefore, conventionally, each antenna device of different weight was equipped with a rotary drive device with a drive torque that matched the weight.
It is necessary to prepare a type of rotary drive device that corresponds to each antenna device, and when increasing or decreasing the number of elements in an already installed antenna device, the rotary drive device must also be replaced. There was an inconvenience in that the antenna device had to be disassembled once, which required a lot of work.

The present application has been made in view of this point, and the rotary drive device attached to the antenna device is configured by attaching and detaching a plurality of drive units each having a gear mechanism connected to a drive portion as appropriate. Rotation is driven by the driving force of one drive unit or by superimposing the driving forces of a plurality of drive units.

An embodiment of the present application will be described below with reference to the drawings.

In FIG. 1, 1 is an antenna device, which is composed of an antenna element 1a and a rotating shaft 1b.
is pivoted to a rotary drive device 2, and the rotary drive device 2 is fixed to the upper part of the antenna support 3.

Next, the rotary drive device 2 will be explained in detail with reference to FIG. 2 and subsequent figures.

Reference numeral 11 is a main body made of a hollow cylinder with a bottom, which has an opening 12a formed on its upper surface and four openings 12b, 12c, 12d, and 12e of the same shape formed at 90° angles on its circumferential surface. A receiving cylinder body 13 is fixed to the upper part of the case, and its upper circumferential surface part 13a is made to protrude from the upper surface opening 12a.
The internal gear 1 is attached to the upper circumferential surface 13a of 3 and the inner circumferential portion of the mouth
The inverted bowl-shaped rotary body 15 fitted with 4 is fitted with the internal gear 14 via a ball bearing 16, and the edge frame body 18 is opposed to the lower surface side of the upper circumferential surface portion 13a via a ball bearing 17. This edge frame 18 is fastened and fixed to the edge of the rotary body 15 with screws 19, and the rotary body 15 is attached to the upper peripheral surface 13 of the receiving cylinder body 13.
It is mounted so that it cannot move vertically with respect to a, but can rotate horizontally. A bracket 20 is fixed to the upper surface of this rotary body 15, which supports the antenna rotation shaft 1b. In addition, the bottomed cylinder portion 1 of the lower half of the receiving cylinder body 13
3b, the input gear 21 is fixed to the lower part, and the lower end of the main shaft 22, which has an axial tooth groove gear part 22a formed in the upper part, is supported via a bearing 23a.
The upper end of 2 is located inside the rotating body 15, and is pivotally supported via a bearing 23b by a support plate 25 fixed to the upper circumferential surface 13a of the receiving cylinder body 13 via a support 24. Intermediate gears 27a, 27b are pivotally connected to shafts 26a, 26b which are pivotally supported between the upper gear part 22a of the main shaft 22 and the internal gear 14 and the upper circumferential surface part 13a of the receiver cylinder 13 and the support plate 25. The rotation of the main shaft 22 is transmitted to the internal gear 14 to rotate the rotating body 15. Support board 2
An antenna direction detecting volume 28 is fixed on the top of the support plate 25 , and a gear 29 is attached to an operating shaft 28 a of the volume 28 .
A gear portion 30a formed on a shaft 30 rotatably supported on the shaft 30 meshes with a gear portion 30a, and a gear 31 is mounted on the shaft 30 and meshes with the internal gear 14 to rotate the rotating body 15.
The rotation is transmitted to the volume operation shaft 29. Also, on the support plate 25 is an operation joint 32.
A, 32a' are provided with switches 32, 32', and the operation contact piece 32 of the switch 32, 32'
A rocking body 32b is rotatably pivotally mounted between a and 32a', and a protrusion 15a is provided on the inner surface of the rotary body 15 corresponding to the free end side, so that the rotary body 15 can be moved approximately in one direction. When the projection 15a rotates once, the oscillator 32
b, and one contact piece 32a is pressed through this oscillating body 32b. When the protrusion 15a rotates approximately once in the other direction, the protrusion 15a presses the other contact piece 32a' through the oscillating body 32b, and the switch 32 and 32' are switched. By switching these switches 32, 32', the drive unit is switched between forward and reverse directions, which will be described later. Four-sided openings 12b, 12 of main housing 11
A drive unit 33 for rotationally driving the main shaft 22 is removably fitted into the shafts c, 12d, and 12e as appropriate.

This drive unit 33 has an opening formed in the main casing 11.
A drive source in this example is an electric motor 35 and a sub-casing 34 of the same size as the four-sided openings 12b to 12e.
The gear 37 which is pivotally attached to the shaft 36 of No. 5 and the main shaft 22
A gear reduction mechanism 38 is built in and is interposed and meshed with the input gear 21 fixed to the input gear 21 . Note that 39 is a capacitor for starting the motor 35. The gear reduction mechanism 38 is constituted by a group of gears supported between support plates 40a and 40b fixed in parallel to the sub-casing 34.

That is, this gear reduction mechanism 38
A large-diameter gear 41 meshed with the gear 37, a small-diameter gear 42 coaxially integrated with this gear 41, and this small-diameter gear 4
2, a small diameter gear 44 coaxially integrated with this gear 43, a large diameter gear 45 meshed with this small diameter gear 44, a small diameter gear 46 coaxially integrated with this gear 45, and a small diameter gear 46 that is coaxially integrated with this gear 45. The input gear 21 is composed of large-diameter joint gears 47 that are engaged with each other, and the last stage joint gear 47 is fixed to the main shaft 22 through a cutout window 13c formed on the circumferential surface of the bottomed cylindrical portion 13b of the receiving cylinder body 13. is engaged with.

The drive unit 33 configured in this manner is meshed and connected to the rotating body 15 via the main shaft 22 by fixing the sub-casing 34 to any one of the openings 12b to 12e of the main housing 11.

In the figure, numeral 50 is a cover plate for closing the empty opening of the main casing 11, and 51 is a power connector for the motor 35 of the drive unit 33 attached to the lower part of the main casing 11.

Next, the operation of the apparatus of this example configured as described above will be explained.

First, if the antenna device 1 is lightweight with a small number of antenna elements 1a, the drive unit 33 is fitted and fixed into one opening in the peripheral surface of the main housing 11, for example, the opening 12b. That is, the secondary casing 34 is inserted into the opening 12b.
Then, the last joining gear 47 of the gear reduction mechanism 38 is fixed in mesh with the input gear 21 of the main shaft 22 through the cutout window 13c formed on the circumferential surface of the bottomed cylindrical portion 13b of the receiving cylinder 13.

In this state, when the power supply circuit of the motor 35 of the drive unit 33 is energized through the power supply connector 51 and the motor 35 is driven, the gear 35 attached to the shaft 36
is rotated, and this rotation is transmitted to the large-diameter gear 47 at the forefront of the gear reduction mechanism 38, and sequentially rotates each gear 42 to
46, the last stage joining gear 47 is rotated at a reduced speed, and this rotating body is transmitted to the input gear 21 of the main shaft 22, so that the main shaft 22 is rotated. This main shaft 22
The rotation is transmitted to the internal gear 14 via intermediate gears 27a and 27b meshed with the upper gear portion 22a, and the rotating body 15 is rotated. As the rotating body 15 rotates, the antenna rotating shaft 1b, which is attached to the rotating body 15 via a bracket 20, is rotated, and the direction of the antenna element 1a is changed. In this manner, the rotating body 15 is rotated to change the direction of the antenna element 1a to match the direction of the opposite station.

The rotation direction of the rotary body 15, that is, the rotation direction of the antenna device 1, is determined by the rotation of the internal gear 14, the gear 31, and the gear portion 3.
It is detected by rotating the operating shaft 28a of the volume 28 via the gear 29 and the gear 29. Further, when the rotating body 15 is rotated approximately once in one direction, the protrusion 15a protruding inside the rotating body 15 engages with the swinging body 32b and presses the operation contact piece 32a of one switch 32, thereby operating the switch 32. Then, the motor 35 of the drive unit 33 is driven in the reverse direction to rotate the rotating body 15 in the opposite direction. When the rotary body 15 is rotated approximately once in the opposite direction, the operating contact piece 32a' of the other switch 32' is pressed by the swinging body 32b, and the rotary body 15 is rotated in one direction again.

In this way, the rotating body 15 does not rotate continuously in one direction, and the lead cord of the antenna element 1a of the antenna device 1 does not wrap around the rotating shaft 16.

Next, when the number of antenna elements 1a of the antenna device 1 is large, the weight of the entire antenna device is large, and a large rotational driving torque is required, one of the other peripheral openings 12c to 12e of the main housing 11 or The drive unit 33 is also fitted to two or more.

That is, the sub-casing 34 of the other drive unit 33 is inserted into the circumferential openings 12c to 12e of the main casing 11, and the last joining gear 47 of the gear reduction mechanism 38 is inserted into the other openings of the cylindrical part 13b of the receiving cylinder 13. Insert the main shaft 2 into the hole window 13c.
It is fixed in a state where it is meshed with the input gear 21 of No. 2.

By meshing and connecting the plurality of units 33 to the main shaft 22 in this manner, the rotational torque of the main shaft 22, that is, the rotational torque of the rotating body 15, increases, making it possible to drive the heavy antenna device in rotation.

Note that the present application is not limited to the above-mentioned embodiments, and in the above-mentioned embodiments, the shape and the number of openings on the main casing 11, the number of constituent gears of the gear reduction mechanism 38 of the drive unit 33, etc. may be changed as necessary. Changes will be made accordingly.

As described above, according to the present application, the rotational drive device of the antenna device is configured such that a plurality of drive units each consisting of a drive unit and a gear mechanism are increased or decreased as necessary for a rotary body that rotates by supporting the antenna rotation axis. Since the structure is configured such that the antenna device can be detachably connected, there is no need to prepare rotary drive devices with different drive torques for each type, and the weight of the antenna device can be reduced by simply preparing drive units with the same drive torque. In addition, when increasing or decreasing the number of antenna elements in an existing antenna device, the drive torque can be set to match the antenna device by simply increasing or decreasing the drive unit, without removing and replacing the rotary drive device. In addition to being very economically advantageous, the drive unit can be attached to and removed from the installed main casing from the outside, making it extremely convenient to handle and use.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an antenna device equipped with a rotary drive device according to the present application, FIG. 2 is a partially omitted longitudinal sectional front view of an example of the rotary drive device according to the present application, and FIG. 3 is a sectional view taken along the line -- in FIG. 2. , Figure 4 is a cross-sectional view along the same line with the rotating body omitted, and Figure 5 is a cross-sectional view along the same line.
FIG. 6 is an inside view of the drive unit. In the figure, 11 is the main casing, 12a is the top opening, and 12b
12e is a peripheral opening, 13 is a receiving cylinder, 14 is an internal gear, 15 is a rotating body, 21 is an input gear, 22 is a main shaft, 27a, 27b are intermediate gears, 33 is a drive unit, 34 is a sub casing, 35 is an electric motor, 38 is a gear reduction mechanism, and 47 is a joining gear.

Claims (1)

[Scope of Claims] 1. A plurality of openings having the same shape are arranged on the circumferential surface, and a rotary body is rotatably mounted on the upper surface to which the antenna device is attached, and inside, a plurality of openings are provided in the plurality of openings. A main shaft with a commonly facing input gear,
a main casing comprising a gear mechanism for transmitting rotation of the main shaft to the rotating body; and a main casing that can be attached to any one opening of the main casing and has an opening at the mounting position. The sub-casing is provided with a driving source and a gear mechanism driven by the driving source and having a connecting gear that meshes with the input gear through the opening when attached to the main housing. A rotational drive device for an antenna device, characterized in that it is composed of a plurality of drive units. 2. The rotational drive device for an antenna device according to claim 1, wherein openings are provided at every 90° angle on the circumferential surface of the main housing. 3. The rotational drive device for an antenna device according to claim 1 or 2, wherein the gear mechanism of the drive unit has a speed reduction function.