JPH02222201A - Mount structure of reflecting mirror and assembling structure of antenna system - Google Patents

Abstract

PURPOSE:To facilitate mounting or assembling and to improve the mount accuracy by fixing the system with an adhesive member and through the combination of simple jigs. CONSTITUTION:A reflecting mirror main body 2 is placed onto a flat base 1 so that its aperture face 2a is directed downward and mount blocks 21, 22 to a reflecting mirror support structure 3 are formed to the rear face of the reflecting mirror main body 2 and joining projections 21a, 22a are implanted to the blocks 21, 22. Pillar shaped jigs 41, 42 are implanted to the base 1 to keep the state having a small gap A between the support structure 3 and the rear face of the reflecting mirror main body 2 (tops of the blocks 21, 22) thereby ensuring the relative position accuracy between the both. In this state, an adhesive member 6 such as a plastic adhesives is filled in the gap A and fixed. Thus, the assembling and mounting are easily attained while the position accuracy among the components is ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention 1 (Field of Industrial Application) This invention relates to a structure, a sketch of the structure, and a structure for attaching a main or sub-reflector of a parabolic antenna used for satellite communications, etc. The present invention relates to an improvement in the assembly structure of an antenna system including the antenna system.

(Prior Art) In recent years, which is also called the information age, a large amount of information has been transmitted using communication satellites, broadcasting satellites, and the like. A large number of earth station facilities are required to support communications and broadcasting using satellites.

Cassegrain or Gregorian parabolic antennas are often used for transmission and reception not only in earth stations for satellites, but also in so-called radar devices for aircraft and the like.

A parabolic antenna consists of a feeding horn and a reflector.
In particular, since beam directional characteristics are an important factor, the issue of mounting the reflector body is ensuring and improving mechanical precision at the location of the reflector and the assembly position of the reflector and the 44:J electric horn.

Conventionally, the structure of mounting a reflector was to use screws to attach the reflector body to its support structure, so the mounting accuracy was dependent on the accuracy of the setting position of each screw hole, etc. influenced by.

In addition, fixing work using screws is affected by the weight of the object to be attached, and misalignment may occur before and after fixing, so obtaining the required assembly accuracy requires considerable skill and post-assembly reference alignment and centering. (Alignment) adjustment took a lot of time.

Even when attaching a single reflector to its support structure, it is difficult to ensure the required mounting accuracy, but as with the Cassegrain antenna mentioned above, it is difficult to ,main.

Assuring accuracy became even more difficult when assembling the antenna system by combining both secondary reflectors and the feeding horn.

In the information age, when there is a demand for a mass supply of high-quality antenna systems, there is a need for high-precision, easy-to-assemble reflectors and antenna system mounting structures.

(Problems to be Solved by the Invention) The conventional structure for attaching a reflector and the assembly structure for an antenna system are such that they are assembled by screwing directly onto a supporting structure such as a reflector. It was difficult to ensure accuracy, and installation and assembly required a high degree of skill and a lot of adjustment work time.

This invention provides a structure for mounting a reflector and an assembly structure for an antenna system, which is easy to install or assemble, and has improved mounting accuracy by combining simple jigs and fixing with adhesive members. The purpose is to

[Structure of the invention]

(Means for Solving the Problems) The first invention has a structure in which the reflecting mirror is mounted by fixing it to a base on which the reflecting mirror body is placed with its opening side facing downward. a jig member, a reflector support structure positioned on the jig member and attached with a small gap from the rear surface of the reflector body; and a reflector support structure and the reflector body using the gap. and an adhesive member for adhesively fixing.

A second invention is an antenna system assembly structure, which includes:
The main reflector is mounted on a base on which the antenna support structure is placed on the reference surface, and the sub-reflector installed on this base is mounted using a jig. The attachment of the jig and the feed horn is characterized by comprising a sub-reflector and a feed horn respectively attached to the jig, and an adhesive member for adhesively fixing the sub-reflector, the feed horn, and the antenna support structure. .

(Function) The invention of ml relates to the structure of attaching a reflecting mirror, in which a support structure attached to a reflecting mirror body is positioned and attached to a jig member attached to a base.

In addition, the support structure is placed with a gap between it and the reflector body placed on the base, and the gap is used to connect the two with an adhesive, ensuring positional accuracy. and is fixed to the supporting structure without being subjected to any external stress.

In other words, the relative positional accuracy between the support structure and the reflector is ensured by the jig member, and no mechanical stress is applied during screw-fastening work to fix the reflector to the support structure. positional accuracy is easily ensured.

The second invention relates to an assembly structure of an antenna system,
First, the antenna support structure to which the sub-reflector and feeding horn are attached is placed on the reference surface for mounting the main reflector on the base, and the sub-reflector and feeding horn assembly jig are also positioned on the base. set and fixed.

That is, the antenna support structure, the sub-reflector, and the feeding horn are all arranged with the base as the center, with relative positional accuracy being ensured via a jig.

Under this condition, the sub-reflector and the power supply horn are adhesively fixed to the support structure, so when these three are fixed, mechanical stress that reduces positional accuracy is generated as in the first invention. Since there is almost no action, assembly can be performed with high precision.

As for the main reflecting mirror, since the antenna support structure itself serves as a jig for attachment, sufficient assembly accuracy is ensured, and there is no need to consider the influence of deterioration of accuracy on the entire antenna system.

(Embodiments) Hereinafter, embodiments of the mounting structure of the reflector and the assembly structure of the antenna system according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partially cutaway side view showing an embodiment of the structure for mounting a reflecting mirror according to the present invention.

That is, the reflecting mirror main body 2 is placed on the flat base 1 with the opening surface 2a side thereof facing downward in a state where no external stress is applied. Blocks 21 and 22 are formed on the back surface of the reflector body 2 for attachment to the reflector support structure 3.
Each block 21.22 has a connecting protrusion 21a, 22a.
has been planted.

Column-shaped jig members 41, 42 are installed on the base l, and maintain a state in which there is a small gap A between the support structure 3 and the back surface of the reflector main body 2 (the top of each block 21, 22). , the relative position accuracy between the two is ensured.

That is, the jig members 41 and 42 each have a reference protrusion 41a.
and a reference support part 42a are provided to face each other, and the reference projection part 41a is provided so as to fit into a reference hole 31 provided in the support structure 3. The reference protrusion 41a serves as a reference position in the height direction of the support structure 3 from the base l, and the inner surface 41c of the jig member 4I serves as a reference position in the lateral direction.

The reflecting mirror main body 2 and the supporting structure 3 which have been positioned in this manner are separated from each other by the connecting protrusions 21a,
22a is a through hole 3a with a slightly larger diameter in the support structure 3;
3b, and is lightly locked by a washer 5a and a nut 5b.

In the state set at a predetermined position in this manner, the gap member is filled with an adhesive member 6 such as a plastic adhesive and fixed. Note that the gap A is a delicately small gap, so the gap A is a shim using a so-called resin spacer.
) etc. can be set using the same method.

Fixing with the adhesive member 6 does not apply mechanical stress like conventional screws, so the mutual positions of the reflector body 2 and the support structure 3 are fixed while ensuring sufficient mechanical positional accuracy. be done.

In this way, according to the structure, the mounting of the reflecting mirror according to the first invention uses the jig members 41, 42, the adhesive member 8, etc., and the positional accuracy between each component is ensured. It is now possible to assemble and install easily.

FIG. 2 shows the assembled structure shown in FIG. 1 with the base l and jig members 41 and 42 removed.

FIG. 3 is a partially cutaway side view showing another embodiment of the structure for attaching the reflecting mirror according to the first invention.

Note that the same components as in FIG. 1 are given the same reference numerals and detailed explanations are omitted.

That is, FIG. 3 shows a mounting structure suitable for assembling a relatively small reflecting mirror, for example, a sub-reflecting mirror. It is done.

A jig member 4 is attached to the base l, and this jig member 4 is a box-shaped body with an opening facing downward so as to cover the reflector body 2, and a jig reference hole 4a is provided at the center bottom of the jig member 4. is set in advance.

A dedicated jig 4b incorporating a disc-shaped reflecting mirror support structure 3 is fitted into the reference hole 4a. The support structure 3 and the dedicated jig 4b are connected to each other by a male screw 5a through a threaded hole that communicates with the central portion. In this state, as in FIG. 1, the support structure 3 and the back surfaces of the reflecting mirror 2 are positioned through the gap, and the adhesive member 6 is inserted into the gap to fix both. After fixing, the dedicated jig 4b can be separated from the support structure 3 by loosening the nut 5b and pulling out the male screw 5a.

Note that the support structure 3 is provided with a reference hole 31 that serves as a reference position when assembled into an antenna system. Further, this reference hole 31 can be constructed so as to fit in advance into a convex portion provided on the special jig 4b.

FIG. 4 shows that the above-mentioned installation is carried out after the base 1. The state in which the support structure 4 and the dedicated jig 4b are removed is shown.

FIG. 5 is a side view showing the state of molding and manufacturing of the reflecting mirror bodies shown in FIG. The state in which the reflecting mirror main body 2 is molded by the upper molding frame 7b is shown.

The reflecting mirror main body 2 is made of a composite material such as FRI' (fiber reinforced plastic), and can be easily removed by applying a release agent to the surface of the lower frame 7a to separate it from the lower frame 7a. . Of course, in the removed state, so-called springback can be applied artificially to release the stress within the mirror surface before attachment or assembly.

Although FIG. 5 shows an example of the reflecting mirror body 2 shown in FIG. 1, it is also possible to mold the reflecting mirror main body 2 shown in FIG. 3 in the same way.

FIG. 6 is a partially cutaway sectional view showing the assembled structure of the antenna system according to the second invention.

That is, the antenna system assembly structure is intended to construct an antenna system using the reflecting mirror according to the first invention as a main component.

Components that are the same as those in FIGS. 1 to 5 are designated by the same reference numerals and detailed explanations will be omitted.

That is, a support base 11 having a reference plane 1a for mounting the main reflecting mirror is provided on the base 1 made up of a large number of frames, and the antenna support structure 8 is attached to the support base 11.

The antenna support structure 8 is composed of a framework etc. that connects each component while maintaining the mechanical precision and mechanical strength required for the entire antenna system.

Therefore, a sub-reflector assembly jig 12 to which the sub-reflector 21 is attached is incorporated into the base l. This incorporation involves a positioning mechanism that uses a combination of concave and convex portions between the base l! Positioning is performed using 2a. Assembly jig 1
A fitting jig 12b that fits into the reference hole 31 is attached to the assembly jig 12 in order to accurately position the reflector support structure 3, and the sub-reflector 21 is held in the assembly jig 12 in this state. .

Similarly, a horn assembly jig 13 for positioning the circular power supply horn 9 is provided on the base l.

The feeding horn 9 has a feeding horn mounting portion 8a set on the antenna support structure 8 and a horn assembly jig 18.
Positioning is performed at the position set by and with mechanical positional accuracy ensured.

In this way, the sub-reflector 21. The relative positions of the feeding horn 9 and the antenna support structure 8 are set, and the required and sufficient mechanical precision is ensured. 9 are connected and fixed by an adhesive member in the same manner as in the first invention.

That is, first, there is a gap between the sub-reflector 2a and the metal fitting 8b attached to the end of the beam of the support structure 3, and between the tip of the power supply horn 9 and another metal fitting 8C located in the middle of the beam. are fixed with adhesive. Of course, the fixing material is not limited to metal fittings, and may be made of synthetic resin.

As described above, the antenna system assembly structure according to the second invention is based on the support structure 8 set on the base l, the sub-reflector assembly jig 12, and the horn assembly jig 13. Since the relative positional accuracy of the components is secured using adhesives, positioning settings can be fixed easily and without applying equivalent mechanical stress, making positioning adjustments and corrections after each assembly configuration exceptionally easy. is not needed.

Note that the support structure 8. After the sub-reflector 21 and the power supply horn 9 are combined, the base 1 is removed and the reference hole 31 is inserted into the main reflector fitting protrusion 8d provided corresponding to the reference protrusion 41a in FIG. Can be fitted and installed.

As described above, in both the first invention and the second invention, each component is assembled using a jig etc. that is pre-assembled into the base 1 as a reference, and is fixed with adhesive while ensuring mechanical positional accuracy. Since each component is not assembled sequentially using screws, etc. as in the past, it is not subject to external stress and can be assembled easily with high precision, which is particularly effective in mass production. is obtained.

[Effects of the Invention] As described above, the mounting structure of the reflecting mirror and the assembly structure of the antenna system according to the present invention are both easy to install or assemble, and can be realized with high mechanical positional accuracy. It is suitable for mass production of antenna systems including reflectors, and has great practical effects.

[Brief explanation of the drawing]

Fig. 1 is a configuration side view showing one embodiment of the structure of the mounting of the reflecting mirror according to the first invention, Fig. 2 is a side view showing the mounting of the reflecting mirror in Fig. 1, and Fig. 3 is the same. The installation of the reflecting mirror according to the first invention is a configuration side view showing another embodiment of the structure, FIG. 4 is a configuration side view showing the subsequent installation of the reflecting mirror in FIG. 3, and FIG. FIG. 6 is a side view showing the molded state of the reflecting mirror shown in FIG. l...Base 2...Reflector main body 3...Reflector support structure 4...Jig member 6...Adhesive member A...Gap agent Patent attorney Dahu Nian Fu Daigang Fig. a No.

Claims (2)

[Claims] (1) a base on which the reflecting mirror body is placed with its opening side facing downward; a jig member fixedly attached to the base;
a reflector support structure positioned on the jig member and attached with a small gap from the rear surface of the reflector body;
A mounting structure for a reflecting mirror, comprising an adhesive member that adhesively fixes the reflecting mirror support structure and the reflecting mirror main body using the gap. (2) A base on which the antenna support structure is placed on the main reflector mounting reference surface, a sub-reflector mounting jig and a feeding horn mounting jig provided on this base, and this sub-reflector mounting jig. An antenna system assembly structure comprising: a sub-reflector and a feed horn attached to a fixture and a feed horn mounting jig, respectively; and an adhesive member for adhesively fixing the sub-reflector, the feed horn, and the antenna support structure.