JPS645365Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an antenna device to be installed outdoors, and further, to a rainproof structure that does not require gaskets or the like on the joint surface of the cover, making it easy to inspect and maintain the internal circuitry, etc., simply by removing the cover.

For example, when communicating or observing using microwaves such as the millimeter wave band outdoors, an antenna device using a parabolic reflector connects the main part of the circuit, such as the high frequency part, to the back of the reflector. It is used as
Therefore, it is necessary to attach a cover to these rear surfaces to protect them from the outside environment, especially from rain and snow.

Conventional cover structures like this have problems due to the fact that the antenna device is fixed to an antenna support stand, etc.
The main part was a completely waterproof and airtight box structure with the parabolic mirror side exposed, so the box structure was complex and required many parts and packings, making processing and assembly troublesome. Not only was the cost high, but it was also extremely troublesome to inspect the interior.

In view of the above points, the present invention integrates the circuit section and the reflector into one piece, and creates a rainproof structure by sandwiching the flange plate that separates the front and rear parts of the boundary between the front and rear covers. This is an antenna device that can be inspected and achieves its purpose without using a gasket or the like in the clamping portion.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

The figure is a side sectional view of the antenna device according to the present invention. This will be explained below with reference to the figures.

Transmitting/receiving units 17, 18 and each are installed in the internal space of box-shaped side plates 13, 14 (only one 13 is shown in the figure) and covers 15, 16 that cover the horizontal substrate 11 and vertical substrate 12 combined in an L shape. A three-dimensional connection circuit, waveguides 19, etc. are attached, and the transmitting/receiving section 1 is configured.

A waveguide 19 is attached to an antenna substrate 21 that passes through a hole in the vertical substrate 12 and is attached to the front surface thereof, and a bowl-shaped parabolic reflector 22 is mounted on the front surface of the antenna substrate 21 and is supported by a stay. The antenna unit 24 to which the secondary mirror 23 is attached is attached to the screw 2.
5 to form the antenna section 2. Note that a groove 26 is provided on the outer periphery of the mounting screw 25 between the vertical substrate 12 and the antenna substrate 21.
A ring-shaped packing 27 is attached to provide a waterproof structure.

A mounting plate 29 is further attached to one front surface of the vertical board 12 by a mounting bracket 28 having an O-shaped cross section so as to surround the outer periphery of the antenna board 21. .
The outer diameter of this mounting plate 29 is larger than the outer diameter of the parabolic reflector 22. Note that the other inner side of the mounting bracket 28 is fixed to the vertical board 12 by screws 30.

A synthetic resin such as FRP is integrally molded with a flange 41 that covers the outside of the transmitting/receiving unit 1 and opens the lower side, that is, the lower surface side of the horizontal board 11, along the surface of the mounting plate 29 and matches the outer diameter of the flange 41. A rear cover 4 is mounted on the front side of the mounting plate 29, that is, on the side of the parabolic reflector 22, and protrudes like an eave around the front opening surface of the mounting plate 29.
A front cover 5 made of synthetic resin such as FRP is attached. This front side cover 5 has an annular edge 51 on the inner periphery that faces the outer periphery of the parabolic reflector 22 with a small gap, and an annular edge 51 on the inner periphery on the back side, that is, the back side of the parabolic reflector 22. a groove 52;
A hole 53 communicating with the outside is bored in the lower side of the
The contact surface 54 with the mounting plate 29 is a recessed portion having an annular portion 55 on its outer periphery that covers the end faces of the mounting plate 29 and the flange 41 of the rear cover 4. It is attached to the front cover 5 by being clamped with a plurality of screws 56.

That is, the rear cover 4 and the front cover 5, which are sandwiched from both sides, are supported by a flange plate as a mounting plate 29 attached to the vertical substrate 12 and extending in the radial direction. The reinforcing ribs 42 formed on the inner surface of the rear cover 4 are supported in substantially contact with the side surfaces 13 and 14 of the transmitter/receiver unit 1 and the outer surfaces of the covers 15 and 16. In addition, 57 is a patch plate.

The antenna device configured as described above is attached and fixed to the antenna device support base 6 shown in phantom lines on the lower surface of the horizontal substrate 11 of the transmitting/receiving unit 1 by means not shown. This support stand 6 has a function of changing the angles in the elevation direction and the horizontal direction so that the antenna device can be oriented in a predetermined direction, and also capable of being fixed in the direction.

As described above, when the antenna device is installed outdoors and it rains, the transmitter/receiver section 1 is covered by the rear cover 4, and rainwater does not enter. On the antenna part 2 side, rainwater that enters through a small gap between the parabolic reflector 22 and the annular edge 51 of the front cover 5 is drained from the hole 53 below along the groove 52 provided behind it. leak to the outside. In addition, some of the rainwater that enters the mating surfaces of the rear cover 4 and the front cover 5 enters along the mounting plate 29 and is transmitted downward, and some rainwater flows down the vertical board via the mounting bracket 28. 12, rainwater flowing down the mounting plate 29 is discharged from the lower gap or hole 53 of the cover, and rainwater flowing downward through the vertical substrate 12 is discharged from the surface mating with the antenna substrate 21. Patch King 27 installed
However, it does not enter the inside of the transmitting/receiving section 1, but instead flows downward and is discharged in the same manner as described above.

Even during wind and rain, the above effects are exactly the same, and rainwater does not enter the transmitting/receiving unit 1. In particular, the lower opening of the rear cover 4 is blocked by the horizontal board 11, and the surrounding area is The cover 4 extends below the horizontal substrate 11 for a sufficient length and surrounds it in a hakama-like manner, thereby preventing rainwater from entering. In the present invention, the front cover protrudes like an eave and is open; however, the same effect can be achieved even if this part is covered as a radome.

As described above, the antenna device according to the present invention prevents rainwater etc. from entering the main internal parts without requiring special packing etc. at the joint part with the cover, and the cover clamps the flange plate. Since the cover is installed as a cover, the interior can be inspected and maintained by easily removing this cover, which not only makes various operations easier during manufacturing and assembly, but also reduces packing. The effect of freeing the required complexity and reducing costs is extremely large.

[Brief explanation of drawings]

The figure is a side sectional view of the antenna device according to the present invention. In the figure, 1 is a transceiver unit, 11 is a horizontal board, 12 is a vertical board, 15 and 16 are covers, 17 and 18 are transceiver units, 19 is a waveguide, 2 is an antenna part,
21 is an antenna substrate, 22 is a parabolic reflector, 2
3 is a secondary mirror, 24 is an antenna unit, 25 is a screw, 26 is a groove, 27 is a packing, 28 is a mounting bracket, 29 is a mounting plate, 4 is a back cover, 5
52 is a groove, 53 is a hole, and 56 is a screw.

Claims (1)

[Scope of utility model registration request] a parabolic reflecting mirror, a main circuit section connected to the back side of the parabolic reflecting mirror, a back cover covering the circuit section, a front side cover of the parabolic reflecting mirror, and the parabolic surface. It consists of a flange plate extending in the radial direction from the connecting member surface that connects the back surface of the reflector and the front surface of the circuit section and isolates the circuit section, and the flange plate is connected to the parabolic reflector side of the back cover. An antenna device which is sandwiched between the flange of the front cover and the end face of the front cover.