JPH04405B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a parabolic antenna device particularly suitable for receiving radio waves transmitted from a broadcasting satellite.

Conventional structure and its problems Traditionally, when installing the primary radiator of a parabolic antenna, support rods and metal fittings were used, and these support rods and metal fittings were fixed at multiple locations around the periphery of the reflector. was once. According to this configuration, each of the separately packaged components is taken out and fixed to the reflector, which has the disadvantage that assembly workability is poor and assembly takes time.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned conventional drawbacks, and an object of the present invention is to provide a parabolic antenna device that has excellent workability in assembling a primary radiator and can be assembled safely.

Structure of the Invention In the parabolic antenna device according to the present invention, both ends of a semicircular first stay are rotatably attached to both ends of a reflector, while a second stay, which has a primary radiator attached to its tip, is also rotatably attached to both ends of a reflector. A positioning means is rotatably attached to the reflector and positions the intersection of the first stay and the second stay at a predetermined angle. , when opening the second stay, the second stay is prevented from dropping (opening) suddenly by the action of the tapered part of the holder that supports the second stay, and one piece is used as the positioning means. It is easy to assemble by simply using bolts and nuts, and the second
This has the advantage that the stay can be expanded safely.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In the figure, 1 is a reflector of a parabolic antenna, 3 is a first stay formed in a semicircle along the periphery of the reflector 1, and both ends are rotated at two locations on the periphery 2 and 2' of the reflector 1. It is mounted so that it can move freely.
As shown in FIG. 2, the first stay 3 can be expanded to be substantially flush with the reflector 1 during packaging. Reference numeral 5 denotes a second stay, which has a primary radiator 6 attached to a mounting portion 7 at its tip, and whose base is rotatably attached to a holder 4 formed integrally with the lower peripheral edge of the reflector 1. There is. This second stay 5
can be folded toward the center of the reflector 1 when packed. Then, when assembling, radiator 6
The intersection point 8 of the first and second stays 3 and 5 is fixed with a bolt 9 and a nut 10, etc., as shown in FIG. 3, so that the stays are fixed at a predetermined angle. In this way, during assembly, the first and second stays 3 and 5 can be rotated and raised, and when both stays 3 and 5 intersect, they can be positioned using a single bolt and nut, which improves assembly work. is extremely good.

Furthermore, this device also prevents the second stay 5 from opening suddenly when the second stay 5 is raised. For this purpose, as shown in FIGS. 4 and 5, the holder 4 is connected to a pair of opposing projecting pieces 11,
The projecting pieces 11 and 12 are provided with holes 14 and 15 corresponding to the through hole 13 of the second stay 5, and the inner surfaces of the projecting pieces 11 and 12 are tapered so that the tips of the projecting pieces 11 and 12 are tapered. The second stay 5 is folded so that the distance between the bases is narrower than the distance between the bases, that is, the second stay 5 is placed almost parallel to the reflector 1.
When the stay 5 is positioned, a gap is created between each protruding piece 11, 12 and the second stay 5, as shown in detail in FIG. As shown in the figure, in the raised state, the distance between the bases of the protrusions 11 and 12 is the second due to the tapered structure.
Therefore, when the second stay 5 is raised from the folded state, the second stay 5 is made smaller than the outer diameter of the stay 5 due to the tapered structure of the protrusions 11 and 12. in contact with
The second stay 5 is gradually clamped and compressed, and even though the second stay 5 is opened (raised) downward, the second stay 5 does not open suddenly. Therefore, it is preferable in terms of safety. In FIG. 5, 16 and 17 are bolts and nuts for attaching the second stay 5 to the projections 11 and 12.

In addition, when storing the package, by releasing the positioning means such as attaching the bolt 9 and nut 10 at the intersection 8, the first stay 3 is rotated along the periphery of the reflector 1, and the second stay 3 is 5 can be packed and stored together with the reflector 1 by folding it toward the center of the reflector 1.

Effects of the Invention As described above, according to the present invention, the first,
By rotatably attaching the second stay,
The radiator can be easily set at a predetermined angle, and the parabolic antenna can be assembled extremely stably and quickly. In addition, the inner surface of the protruding piece that supports the second stay is tapered so that when the second stay is raised, the second stay comes into contact with the protruding piece from the middle. Even when opening downward, the second
This has the advantage that the stay will not open suddenly, allowing work to be carried out safely.

[Brief explanation of drawings]

FIG. 1 is a side view of a parabolic antenna device according to an embodiment of the present invention when assembled, FIG. 2 is a plan view when stored, and FIG. 3 is a partially enlarged view of the intersection of both stays.
FIG. 4 is an enlarged view of the stay support below the reflector, and FIG. 5 is an exploded perspective view of the stay support. DESCRIPTION OF SYMBOLS 1... Reflection plate, 2... Support part, 3... First stay, 4... Holder, 5... Second stay, 6
...Radiator, 8...Intersection, 11,12...Protrusion piece,
13, 14, 15... holes.

Claims (1)

[Claims] 1 The first part is formed in a semicircular shape along the periphery of the reflector and has both ends rotatably attached to both ends of the reflector.
a second stay with a radiator attached to its tip and a base rotatably attached to the lower periphery of the reflector, and positioning the intersection of the first stay and the second stay at a predetermined angle. The attachment portion of the second stay to the reflecting plate has a pair of protrusions sandwiching the second stay, and the inner surfaces of these protrusions are tapered to form a second stay. When the stay is folded, a gap is created between the protruding piece and the second stay, and when the second stay is raised, the second stay is in contact with the inner surface of the protruding piece. Parabolic antenna device.