JP2732649B2 - Mounting structure of reflector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an improvement in a mounting structure of a primary or secondary reflector of a parabolic antenna used for satellite communication or the like.

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

Cassegrain-type and Gregorian-type parabolic antennas are often used for transmission and reception not only in such satellite-targeted earth stations but also in so-called radar devices and the like for aircraft and the like.

A parabolic antenna is composed of a feed horn and a reflector.Because beam directivity is an important factor in particular, securing mechanical accuracy in the mounting position of the reflector main body and in the assembly position of the reflector and the feed horn is important. Improvement is a challenge.

In the conventional mounting structure of a reflecting mirror, the mounting structure of the reflecting mirror body to a supporting structure thereof is a screw (screw). Therefore, the mounting accuracy depends on the set position accuracy of each screw hole. Was done. In addition, the fixing work with screws is affected by the weight of the object to be mounted, which causes a positional shift before and after fixing. Therefore, considerable skill is required to obtain the required assembly accuracy, and the reference and alignment after assembly are required. It took a lot of time to adjust (alignment).

Even if one reflector is mounted on the supporting structure, it is not easy to secure the required mounting accuracy. However, as in the case of the Cassegrain antenna described above, focusing on the antenna supporting structure, If the antenna system is assembled by combining the main and sub reflectors and the feeding horn, it is more difficult to secure the accuracy.

2. Description of the Related Art In the information age, when a large supply of high quality antenna systems is required, it is required to realize a reflector and an antenna system mounting structure with high accuracy and easy assembly.

(Problems to be Solved by the Invention) The conventional mounting structure of the reflector and the assembling structure of the antenna system have a structure in which each is directly screwed to a supporting structure such as a reflecting mirror, so that positional accuracy is reduced. In addition, it was difficult to assure the required assembly time, and mounting and assembling required high skill and a lot of adjustment work time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mounting structure of a reflector which is easy to mount or assemble and has improved mounting accuracy and the like by a simple combination of jigs and fixing by an adhesive member.

[Configuration of the Invention] (Means for Solving the Problems) An attachment structure for a reflector according to the present invention includes: a reflector main body arranged to be in contact with a base; a jig member provided on the base; A reflector main body structure having a gap with the reflector main body, fixed and positioned on the jig member, and a gap filled with the reflector body and the reflector support structure bonded and fixed to each other And an adhesive member formed as described above.

(Operation) The present invention relates to a mounting structure of a reflecting mirror, wherein a supporting structure mounted on a reflecting mirror main body is positioned and mounted on a jig member mounted on a base. In addition, the support structure is arranged with a gap from the reflecting mirror body mounted on the base, and the two are joined by an adhesive member using the gap, so that the position accuracy is secured. And is fixed to the support structure without receiving any external stress.

That is, the relative positional accuracy between the support structure and the reflecting mirror is secured by the jig member, and since the reflecting mirror is fixed to the supporting structure, no mechanical stress is applied during a screwing operation.
Mutual positional accuracy is easily ensured.

When assembling the antenna system, for example, the antenna support structure to which the sub-reflector and the power supply horn are mounted is placed on the reference surface of the base where the main reflector is mounted, and the sub-reflector and the power supply horn are mounted on the base. The horn assembly jig is similarly positioned and secured.

That is, both the sub-reflector and the feed horn are arranged together with the antenna support structure with the jig provided around the base so as to ensure relative positional accuracy.

Under this condition, the sub-reflector and the power supply horn are bonded and fixed to the support structure. Therefore, when the three members are fixed to each other, as in the present invention, there is almost no mechanical stress that lowers positional accuracy. Therefore, it is possible to assemble with high accuracy.

In addition, as for the main reflector, since the antenna support structure itself serves as a mounting jig, sufficient assembling accuracy is ensured, and it is not necessary to consider the influence of a decrease in accuracy on the entire antenna system.

(Embodiments) Hereinafter, embodiments of a mounting structure of a reflector and an assembling structure of an 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 one embodiment of a mounting structure of a reflector according to the present invention.

That is, the reflector main body 2 is placed on the flat base 1 with no external stress applied so that the opening surface 2a side thereof faces downward. Blocks 21 and 22 for attachment to the reflector support structure 3 are formed on the back surface of the reflector main body 2, and joining projections 21 a and 22 a are erected on each of the blocks 21 and 22.

Column-shaped jig members 41 and 42 are erected on the base 1, and the support structure 3 and the back surface of the reflecting mirror body 2 (the tops of the blocks 21 and 22).
Is maintained with a small gap A between them, and the relative positional accuracy between them is ensured.

That is, the jig members 41 and 42 are respectively provided with a reference projection 41a and a reference support 42a facing each other, and the reference projection 41a is provided so as to fit with the reference hole 31 provided in the support structure 3. Have been. The height direction of the support structure 3 from the base 1 is defined by the reference projection 41a, and the lateral direction is the inner surface 4 of the jig member 41.
1c is the reference position.

The reflecting mirror body 2 and the support structure 3 positioned in this manner are separated from each other by the bonding projections 21a, 22a with a gap A therebetween.
Is lightly locked by the washer 5a and the nut 5b through the through holes 3a and 3b formed in the support structure 3 with a slightly larger diameter.

In such a state set at a predetermined position, the gap A is filled with an adhesive member 6 such as a plastic adhesive and fixed. Since the gap A is a delicate small interval,
The gap A is a shim using a so-called resin spacer.
Etc. can be set in a manner to be used.

Since the fixing by the bonding member 6 does not apply a mechanical stress by a screw as in the conventional case, the mutual position between the reflector main body 2 and the support structure 3 is set in a state where the mechanical position accuracy is sufficiently secured. Fixed.

As described above, according to the mounting structure of the reflecting mirror according to the first aspect of the present invention, the use of the jig members 41 and 42 and the adhesive member 6 enables the positional accuracy between the respective components to be ensured. It became possible to easily assemble and attach.

FIG. 2 shows a state in which the base 1 and the jig members 41 and 42 have been removed from the assembled structure shown in FIG.

FIG. 3 is a partially cutaway side view showing another embodiment of the mounting structure of the reflector according to the first invention.

The same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

That is, FIG. 3 shows a mounting structure suitable for assembling a relatively small reflecting mirror, for example, a sub-reflecting mirror. The reflecting mirror main body 2 is placed on the base 1 below the opening surface 2a. Have been.

A jig member 4 is attached to the base 1. The jig member 4 is formed of a box-shaped body having an opening downward so as to cover the reflecting mirror main body 2, and has a jig reference hole 4a at the center bottom thereof. Is provided in advance.

A dedicated jig 4b incorporating the 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 a screw hole communicating at the center with a male screw 5a. In this state, as in FIG.
Since the support structure 3 and the back surface of the reflecting mirror 2 are positioned,
The adhesive member 6 is inserted into the gap A to fix them. After fixing, loosen nut 5b and pull out male screw 5a,
The dedicated jig 4b can be separated from the support structure 3.

Note that the support structure 3 is provided with a reference hole 31 serving as a reference position for assembling the antenna system. Further, the reference hole 31 can be configured to be fitted in advance to a convex portion provided on the dedicated jig 4b.

FIG. 4 shows a state in which the base 1, the support structure 4, and the dedicated jig 4b have been removed after the mounting.

FIG. 5 is a side view showing a molding and manufacturing state of the reflecting mirror main body shown in FIG. 1, respectively. A convex molding lower frame 7a having a reflecting surface formed thereon is mounted on the base 1 and a concave molding is formed. The state where the reflecting mirror main body 2 is molded by the molding upper frame 7b is shown.

The reflector body 2 is made of a composite material such as FRP (fiber reinforced plastic) or the like, and is easily removed if a release agent is applied to the surface of the lower frame 7a to separate it from the lower frame 7a. Of course, in the detached state, so-called springback can be performed artificially to release the stress in the mirror surface, and then the mounting and assembling can be performed.

Although FIG. 5 shows an example of the reflecting mirror main body 2 shown in FIG. 1, the reflecting mirror main body 2 shown in FIG. 3 can be formed in the same manner.

FIG. 6 is a partially cutaway sectional view showing an assembly structure of the antenna system.

That is, the assembly structure of the antenna system intends to configure the antenna system using the reflector according to the present invention as a main component.

The same components as those in FIGS. 1 to 5 are denoted by the same reference numerals, and detailed description is omitted.

That is, the base 1 composed of a number of frames is provided with a support 11 on which a main reflector mounting reference surface 1a is set, and the antenna support structure 8 is mounted on the support 11. The antenna support structure 8 is configured by a framework or the like that couples each component while maintaining the required mechanical accuracy and mechanical strength of the entire antenna system.

Therefore, a sub-reflecting mirror assembly jig 12 to which the sub-reflecting mirror 21 is attached is incorporated in the base 1. In this integration,
Positioning mechanism by combining uneven parts with base 1
Positioning is performed using 12a. A fitting jig 12b that fits into the reference hole 31 is attached to the assembling jig 12 so that the reflector supporting structure 3 is accurately positioned. In this state, the sub-reflector 21 is attached to the assembling jig 12. Will be retained.

Similarly, the base 1 is provided with a horn assembly jig 13 for positioning the circular power supply horn 9.

The power supply horn 9 is positioned at a position set by the power supply horn mounting portion 8a set on the antenna support structure 8 and the horn assembly jig 13 while ensuring mechanical position accuracy.

In this manner, the relative positions of the sub-reflector 21, the feed horn 9, and the antenna support structure 8 are set and mechanical accuracy is required and sufficiently ensured. 8 and the sub-reflector 21 and the power supply horn 9 are connected and fixed by an adhesive member in the same manner as in the present invention.

That is, first, between the sub-reflector 2a and the metal fitting 8b attached to the beam end of the support structure 3, and between the auxiliary reflecting mirror 2a and the other metal fitting 8c in the middle of the beam similarly to the tip of the power supply horn 9. Are fixed by adhesive. Of course, the fixing is not limited to the metal fitting, but may be made of a synthetic resin.

As described above, the assembly structure of the antenna system includes the support structure 8 set on the base 1 and the sub-reflector assembly jig.
12 and the horn assembly jig 13 are fixed with an adhesive member in a state where the relative positional accuracy of these components is secured, so that the positioning can be easily fixed without applying any mechanical stress. It is possible to eliminate the need for position adjustment and correction after each assembly.

After the support structure 8, the sub-reflection mirror 21 and the power supply horn 9 are connected, the base 1 is removed, and the reference projection 41 shown in FIG.
The reference hole 31 is provided in the main reflecting mirror fitting projection 8d provided corresponding to a.
Can be fitted and mounted.

As described above, the present invention is configured such that each component is incorporated based on a jig or the like incorporated in the base 1 in advance and bonded and fixed in a state where mechanical positional accuracy is secured. Since the components are not assembled sequentially with screws or the like as in the prior art, the components are not subjected to external stress, can be easily assembled with high precision, and a great effect can be obtained particularly in mass production.

[Effects of the Invention] As described above, according to the present invention, mounting or assembling is easy, and it can be realized with high mechanical position accuracy, which is suitable for mass production of an antenna system including a reflector. There is a great practical effect.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a mounting structure of a reflector according to the present invention, FIG. 2 is a side view showing the reflector after being mounted in FIG. 1, and FIG. 3 is a reflector according to the present invention. 4 is a side view showing the structure of another embodiment of the mounting structure of FIG.
FIG. 3 is a side view showing the configuration of the reflector after being mounted in FIG. 3, FIG. 5 is a side view showing a molded state of the reflector shown in FIG. 1, and FIG. 6 is a side view showing the assembly structure of the antenna system. It is. DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Reflecting mirror main body 3 ... Reflecting mirror support structure 4 ... Jig member, 6 ... Adhesive member A ... Gap

Claims (1)

(57) [Claims] 1. A reflector main body disposed in contact with a base, a jig member provided on the base, and a gap between the reflector main body and a fixture fixed to the jig member for positioning. A mounting structure for a reflector, comprising: a reflector supporting structure formed as described above; and an adhesive member that is filled in the gap portion and that adheres and fixes the reflector main body and the reflector supporting structure.