JPH02296403A - On-vehicle antenna system - Google Patents

Abstract

PURPOSE:To reduce the expansion of the antenna and the storage time by supporting a reflecting mirror main body formed smaller than the size of a vehicle to the vehicle so as to be turned vertically and providing a reflecting mirror extension part able to be extended horizontally to the left and right side of the reflecting mirror main body in a relatively movable way. CONSTITUTION:Left/right reflecting mirror extension parts 8, 8 are slid and extended to both sides of a reflecting mirror main body 7 in the expansion state of the antenna system in use and the reflecting mirror main body 7 and the reflecting mirror extension parts 8, 8 form a reflecting mirror with a prescribed aperture diameter. In the containing state of the antenna system, the reflecting mirror extension parts 8, 8 are slid and contained in the reflecting mirror main body 7 and a jack 9 reduces its length and the reflecting mirror main body 7 is turned around a rotary center shaft 6, then the reflecting mirror main body 7 is loaded on the vehicle 1 while being fallen sidelong. Thus, through the constitution above, the reflecting mirror extension parts 8, 8 are slid to the reflecting mirror main body 7 and the reflecting mirror main body 7 is turned by using only the jack 9, then the expansion and containing of the antenna system are realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an antenna device mounted on a vehicle, and more particularly to an antenna device configured such that a parabolic antenna is housed within vehicle height and vehicle width limitations.

[Conventional technology]

In a vehicle-mounted parabolic antenna that moves while loaded on a vehicle, the width and height are restricted by vehicle restriction ordinances and the like. Conventionally, for antennas having an aperture diameter exceeding this limit, measures have been taken to remove the excess portion, move it, and attach it when necessary. Also, ¥! As disclosed in Japanese Patent Application No. 57-172389, a measure has also been taken in which the antenna is folded in two, upper and lower, for storage.

[Problem to be solved by the invention]

In the conventional measures mentioned above, the former involves deploying the antenna,
There is a problem that it takes time to store.

In addition, in the latter case, in order to store a reflector with an aperture diameter larger than the width of the vehicle required for communication, the longitudinal direction of the vehicle must match the horizontal direction of the antenna, making it impossible to load only one antenna on one vehicle. However, there is a problem in that it is necessary to connect the transceiver to the vehicle carrying the transceiver at the deployment point with a cable, which takes time to deploy and store.

An object of the present invention is to provide an on-vehicle antenna device that can be deployed and stored easily and in a short time.

[Means to solve the problem]

In the vehicle-mounted antenna device of the present invention, a horn serving as a primary radiator is disposed in a part of a transmitting/receiving shelter fixedly mounted on a vehicle, and the horn is covered with a horn cover.

Further, the reflector main body is supported rotatably in the vertical direction on a pillar installed in the vehicle. The length of the reflector main body in the vertical and horizontal directions is smaller than the length of the vehicle, and reflector projecting portions that can extend to the left and right of the reflector main body are provided on the left and right sides thereof so as to be relatively movable. ing.

[Effect]

In this configuration, the reflector overhang is housed within the reflector body,
It can also be stored on the vehicle by rotating downward. Conversely, by extending the reflector overhang to the left and right of the reflector body and rotating it upward, it can be deployed on the vehicle as a reflector with the required opening size, and work in conjunction with the horn to function as an antenna. let

〔Example〕 Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a side view showing an unfolded state of an antenna device according to an embodiment of the present invention. In the figure, ■ is a vehicle such as a truck, and a shelter 2 equipped with a transmitting/receiving device is loaded on its loading platform. A horn 3 constituting a primary radiator or the like is disposed at the upper front side of the shelter 2, and is covered with a horn cover 4.

Further, a support column 5 is erected at the rear of the loading platform, and a rotation center shaft 6 provided at the upper end of the support column 5 rotates the reflecting mirror main body 7.
is supported so that it can rotate up and down. In this case, the reflector main body 7 is formed shorter than the entire length of the vehicle 1, and the lower portion when in use is supported by the rotation center shaft 6. Further, the left and right width dimensions of the reflector main body 7 are made to match the size of the vehicle, and reflector projecting portions 8.8 are attached to the left and right sides, respectively. Furthermore, an extendable jack 9 is connected to the lower end of the reflecting mirror main body 7 between it and the loading platform. The reflecting mirror projecting portions 8.8 are configured to be movable in the left and right directions relative to the reflecting mirror main body 7 by a mechanism not shown, and can be extended to the left and right of the reflecting mirror main body 7, or It can be stored inside the main body 7.

In the antenna device having this configuration, in the unfolded state when in use as shown in FIG. The mirror projecting portion 8°8 constitutes a reflecting mirror with a predetermined aperture diameter. Further, the jack 9 is extended to rotate the entire reflecting mirror around the central axis of rotation 6, and the reflecting mirror is erected on the loading platform to function as a reflecting mirror.

FIG. 2 shows the stored state of this antenna device, in which the reflector projecting parts 8, 8 are slid to be housed in the reflector main body 7, and the jacks 9 are shortened to rotate around the rotation center axis 6. By rotating, the reflector main body 7 is loaded sideways on the vehicle l.

Therefore, according to this configuration, the antenna device can be deployed and retracted simply by sliding the reflector projecting portion 8.8 relative to the reflector body 7 and rotating the reflector body 7 by the jack 9. realizable. This makes it possible to expand and store files in a short time. In addition, since there is no need to move the horn 3 and the transmitter/receiver shelter 2 on the vehicle during the deployment and retraction operations, there is no need to connect and disconnect cables between the two, making it possible to further improve the antenna deployment performance. becomes.

〔Effect of the invention〕

As explained above, the present invention supports a reflector main body formed smaller than the vehicle dimensions on the vehicle so as to be rotatable in the vertical direction, and has reflector projecting portions on the left and right sides of the reflector main body that can extend left and right. Since it is provided so that it can be moved relative to the reflector, it can be stored on the vehicle by housing the reflector projecting part within the reflector main body and rotating it downward. In addition, the reflector can be expanded by extending the reflector projecting parts to the left and right of the reflector body and rotating upward, which allows the antenna to be deployed.
This has the effect of shortening storage time.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment of the present invention in its unfolded state, and FIG. 2 is a side view of its retracted state. l...vehicle, 2...transceiver shelter, 3...
Horn, 4...Horn cover 5...Strut, 6...Rotation center axis, 7...Reflector main body, 8...Reflector overhang, 9...Jacket. Diagram

Claims (1)

[Claims] 1. A horn as a primary radiator is installed in a part of the transmitting/receiving shelter fixedly mounted on the vehicle and covered with a horn cover, and a reflector body can be rotated vertically on the pillar installed on the vehicle. The reflector main body has lengths in the vertical and horizontal directions smaller than the length of the vehicle, and on the left and right sides thereof, reflector projecting portions that can extend to the left and right of the reflector main body are relatively movable. An in-vehicle antenna device characterized in that it can be installed.