JPS6121850Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a parapolar antenna mainly used for receiving signals from broadcasting satellites, and also relates to the structure of a parapolar antenna that can be used for transmission if necessary. It is something.

The purpose of the present invention is to attach a converter case with a slot so that it can be rotated to a holder that is fixed at an appropriate distance from the mirror surface of a parabolic reflector. To provide a parapolar antenna in which the direction of the slot can be variably adjusted in response to the polarization plane of an incoming signal by rotating the converter case relative to the holder during reception. It is.

The drawings showing the embodiments of the present application will be described below. In Figure 1, 1 is a parapolar antenna,
An example and incoming signal from broadcast satellite 2 (usually
It is configured to be able to receive SHF radio waves (SHF radio waves are used). Incidentally, reference numeral 3 denotes a fixture connected to a well-known parabolic reflector 4 in the parapolar antenna 1, and is used to fix it to any fixed object such as the ground or a building, as is commonly known.

Next, reference numeral 5 denotes a plurality of support rods, as shown schematically in FIG. Converter case 7 via tool 6
It is designed to support the following.

Next, a description will be given of FIGS. 3 and 4 showing the relationship between the holder 6 and the converter case 7 in detail.
8 is a hollow annular holder main body of the holder 6;
The inside has a hollow portion 8' having a diameter sufficient to insert a portion of the converter case 7, as shown in FIG. Further, the outer periphery of the main body 8 is provided with a plurality of through holes 9 for connecting the holder auxiliary body, as shown in FIG. Provide multiple, third
As shown in the figure, the female screw hole 1 is inserted through the through hole 9.
The main body 8 is connected to the auxiliary body 10 by a plurality of bolts 12 which are screwed into the main body 8 . Further, the diameter of the hollow portion 10' of the auxiliary body 10 is the same as that of the converter case 7.
It is large enough to insert. Next, as is well known, the converter case 7 contains a frequency conversion circuit (not shown), etc., and is inserted into the slot 1.
The received signal from No. 3 can be frequency-converted and sent to the next stage (receiving device not shown). On the slotted end surface side 7' of the case 7, reference numeral 14 denotes an abutment surface formed so as to be able to abut against the outer surface 6' (opposite the parabolic reflector side) of the holder body 8, and 15 denotes a hollow portion of the main body 8. 16 indicates a male thread provided on the outer periphery of the thin diameter portion formed to allow loose insertion into the inside of the portion 8'. Next, reference numeral 17 indicates a hollow annular tightening body, which has a female thread 18 on its inner periphery that can be screwed into the male thread 16 of the converter case, and has an inner surface 6'' of the holder main body 8 (parabolic reflector side). ), and an annular protrusion 20 that fits into the inner circumferential surface 8'' of the main body 8. Incidentally, 21 and 22 are mounting devices that allow screwing of a well-known primary radiator that is usually fixed around the slot 13 of the converter case and primary radiators of various shapes.
2' and 22'.

Next, when assembling the parapolar antenna,
As shown in FIG. 2, one end of each of the plurality of support rods 5 is fixed to the reflector 4 by any known means such as a nut 23. As shown in FIG. Further, the other end of each support rod 5 is fixed to the holder auxiliary body 10 of the holder 6 using any means. For example, as shown in the figure, the male screws 5' at the tips of the support rods 5 may be screwed into a plurality of female screw holes 24 provided in the auxiliary body 10, respectively.
Note that 24' indicates a positioning nut.

After the positional relationship of the holder auxiliary body 10 with respect to the parabolic reflector 4 is fixed in this manner, the holder main body 8 is fixed to the auxiliary body 10 using the three bolts 12 as described above. In this case, by interposing a spring 25 between the main body 8 and the auxiliary body 10, it is possible to arbitrarily adjust the positional relationship between the two. Next, the abutment surface 14 of the converter case 7 is brought into contact with the outer surface 6' of the holder main body 8, and the female thread 18 of the clamping body 17 is screwed into the male thread 16 of the converter case 7. By abutting the collar 19 against the inner surface 6'' of the main body 8, the converter case 7 is fixed to the holder main body 8 as shown in FIG.

In addition, during the above-mentioned fixing and subsequent reception, when the slot 13 is oriented in the direction of the arrow 26 indicating the horizontal direction, as shown in FIG.
By rotating in 7 directions, the above slot 1
Arrow 28 indicating the direction (longitudinal direction) of 3 in the vertical direction
It is easily possible to point in any direction other than the direction of the arrow 26 described above.

Note that, as is generally known, reception and transmission are relative terms, and may be understood interchangeably.

Next, FIGS. 5 to 7 showing different embodiments will be explained. These figures show an adjustment mechanism for adjusting the direction of the central axis of the holder 6 (or the central axis of the converter case 7) with respect to the parabolic reflector 4. That is, by protruding three support rods 5 from the parabolic reflector 4 and attaching holders 6 to their tips, each of the support rods 5 is formed into a turnbuckle configuration as shown in FIG. This makes it possible to adjust the expansion and contraction, thereby making it possible to displace the central axis of the holder 6.
In addition, in the above turnbuckle configuration, 30 and 3
1 is a left-handed threaded bolt, a right-handed threaded bolt, 32 and 33 are fixing nuts that are screwed together, and 34 is a connecting shaft for rotation, and the above-mentioned bolts 3 are attached to each end of the shaft.
It is equipped with a female threaded hole that screws into the hole. It should be noted that parts that are functionally the same or considered to have equivalent configurations to those in FIGS. 1 to 4 are given the same reference numerals as those in the previous figures, and redundant explanations are omitted. (Also, in the following figures, the same idea is applied and redundant explanations will be omitted.) Fig. 8 shows a state in which the main body 8 of the holder 6 is tilted with respect to the auxiliary body 10. , shows a state in which the tilt adjustment (or focus adjustment) of the main body 8 is possible by adjusting the tightness of the three bolts 12 for fixing it to the auxiliary body 10, as described above.

As described above, in this invention, the hollow annular holder 6 is fixed to the tip of the support rod 5 protruding from the parabolic reflector 4, and the converter case 7 is rotatably fixed to this. Therefore, the converter case 7 is rotated according to the polarization plane of the incoming signal at the receiving end, and the orientation of the slot 13 provided in the case 7 is changed so as to enable the incoming signal. It has the feature of being adjustable and allowing appropriate reception.

Moreover, when making this adjustment, the converter case can be easily rotated simply by loosening the screwed state of the fastening body 17 relative to the converter case 7, so that the rotation adjustment can be effected simply, easily and quickly.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a side view showing the reception state, FIG. 2 is a vertical sectional view of a parabolic antenna, and FIG. 3 is an enlarged sectional view of the main part of FIG. 2.
Figure 4 is an exploded perspective view of the main parts, Figure 5 is a front view of the parapolar antenna, Figure 6 is a partially enlarged view of the converter case fixed to the holder, viewed from the parabolic reflector side, and Figure 7. FIG. 8 is an enlarged enlarged view showing the supporting rod part in an exploded manner, and FIG. 8 is a partially cutaway view showing the tilting state of the converter case with respect to the holder. 4... Parabolic reflector, 5... Support rod, 6...
Holder, 7...Converter case, 13...Slot, 17...Tightening body.

Claims (1)

[Scope of utility model registration request] a parabolic reflector that can be fixed via a fixture; a holder that is fixed at a position an appropriate distance from the mirror surface of the parabolic reflector by a support rod protruding from the parabolic reflector; In the parapolar antenna, the converter case is fixed to the holder with its slot facing the mirror surface, and the holder is formed into a hollow annular shape, while the converter case has a slot. On the end surface side, an abutting surface that can be abutted against the outer end surface of the holder is formed at the outer periphery, and the abutting surface is rotatably inserted into the hollow part of the holder at the inner periphery of the abutting surface. The positioned narrow diameter portion is provided in a protruding shape, and a male thread is provided around the narrow diameter portion, while a tightening body having an outer diameter larger than the diameter of the hollow portion of the holder is provided inside the holder. The converter case is attached to the holder by abutting the end face and screwing and tightening the male thread in the narrow diameter part around the slot and the female thread formed on the inner peripheral surface of the tightening body. A parapolar antenna that is fixed so that its rotation can be adjusted.