JPS62267Y2 - - Google Patents
Info
- Publication number
- JPS62267Y2 JPS62267Y2 JP1980052698U JP5269880U JPS62267Y2 JP S62267 Y2 JPS62267 Y2 JP S62267Y2 JP 1980052698 U JP1980052698 U JP 1980052698U JP 5269880 U JP5269880 U JP 5269880U JP S62267 Y2 JPS62267 Y2 JP S62267Y2
- Authority
- JP
- Japan
- Prior art keywords
- reflector
- sub
- screw shaft
- screw
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
【考案の詳細な説明】
本考案はカセグレン方式のアンテナに係り、と
くにその副反射鏡の軸方向への移動調整可能な支
持装置部に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a Cassegrain type antenna, and more particularly to a supporting device part that can adjust the movement of a sub-reflector in the axial direction.
マイクロ波ないしミリ波帯で通信或いは各種の
測定用に用いられるカセグレン方式のアンテナは
基本的には第1図の側断面図に示すような関係に
構成される。すなわち、凹面でなる主反射鏡1の
中心に位置する一次放射器2とこれら1,2と対
向する位置に凸面でなる副反射鏡をそれぞれ所定
の関係位置に配設し、一次放射器2から電磁波エ
ネルギーAを放射し、これを副反射鏡3および主
反射鏡1によつて所定の放射特性となるように放
射A′,A′するものが周知である。このアンテナ
は可逆的に到来電波を一次放射器2に収束入射す
ることもできる。 A Cassegrain antenna used for communication or various measurements in the microwave or millimeter wave band is basically constructed in the relationship shown in the side sectional view of FIG. That is, a primary radiator 2 located at the center of a main reflecting mirror 1 having a concave surface, and a sub-reflecting mirror having a convex surface facing these 1 and 2 are arranged in predetermined relationship positions, and from the primary radiator 2 A device that emits electromagnetic wave energy A and radiates it A', A' by a sub-reflector 3 and a main reflector 1 so as to have predetermined radiation characteristics is well known. This antenna can also reversibly converge and inject incoming radio waves into the primary radiator 2.
上記アンテナは要部に固定するための基準とな
る部分が普通主反射鏡部であり、これを基準に適
当な枠体等を設けるとともに一次放射器、副反射
鏡をそれぞれ前述の所定の関係となるように固定
配設する。この場合とくに重要なことは副反射鏡
の位置・方向であり、これは空間に位置している
ためその位置を正確に、かつ維持させることは難
しい。 In the above antenna, the reference part for fixing it to the main part is usually the main reflector part, and with this as a reference, an appropriate frame etc. is provided, and the primary radiator and sub-reflector are arranged in the above-mentioned predetermined relationship. Fixedly placed so that What is particularly important in this case is the position and direction of the sub-reflector, and since it is located in space, it is difficult to maintain its position accurately.
従来、第2図の要部斜視図に示すように副反射
鏡20の鏡面4の反対側裏面5に同軸に突設され
た棒状軸6と、この軸6を嵌合する支持体7と、
支持体7から一体に3本の放射方向に突出する板
状の取付け部8と、この取付け部8と主反射鏡部
1とを結合(詳細は図示せず)する支脚9とをね
じ10止めしていた。なお、11は支持体7に螺
合しているねじで軸6を押し付け固定するための
ものである。以上のような構成でねじ11の緩ん
でいる状態としておき、軸6を支持体7の嵌合方
向すなわち軸方向に直接的に移動させ、一次放射
器2並びに主反射鏡1面に対する距離位置を所定
に定め、ねじ11を締め付け固定するとともに、
一方で支脚9と取付け部8のねじを副反射鏡20
の軸方向を全体の軸方向と一致させるように定め
て締め付け固定する。 Conventionally, as shown in the perspective view of the main part of FIG. 2, a rod-shaped shaft 6 coaxially protrudes from the back surface 5 opposite to the mirror surface 4 of the sub-reflector 20, and a support body 7 into which the shaft 6 is fitted;
The three plate-shaped attachment parts 8 that integrally protrude in the radial direction from the support body 7 and the supporting legs 9 that connect the attachment parts 8 and the main reflector part 1 (details not shown) are secured with screws 10. Was. Incidentally, numeral 11 is a screw screwed into the support body 7 for pressing and fixing the shaft 6. With the above configuration, with the screw 11 loosened, the shaft 6 is moved directly in the fitting direction of the support 7, that is, in the axial direction, and the distance position with respect to the primary radiator 2 and the main reflecting mirror 1 is adjusted. while fixing by tightening the screw 11.
On the other hand, attach the screws of the supporting leg 9 and the mounting part 8 to the sub-reflector 20.
Tighten and fix so that the axial direction of the main body matches the axial direction of the whole.
しかしながら上記従来の副反射鏡取付け構造は
支脚9と支持体7の取付け部8とが互いの当接面
方向にねじ10を中心として回転可能であり、こ
の回転可能であるがために軸方向を調節可能とし
ている反面基準となるべき部分がないため、逆に
軸方向を一致させることが困難であるばかりでな
く、固定後においてもなお動く恐れがあつた。そ
のほか軸6に対してねじ11を締め付けると嵌合
部の隙間に起因して傾いたり軸方向に動いたりす
ることもある。 However, in the conventional sub-reflector mounting structure described above, the support leg 9 and the mounting portion 8 of the support body 7 are rotatable about the screw 10 in the direction of their mutual contact surfaces, and because of this rotatability, the axial direction is Although it is adjustable, since there is no part to serve as a reference, it is not only difficult to align the axial directions, but also there is a risk that it will still move even after being fixed. In addition, when the screw 11 is tightened with respect to the shaft 6, the screw 11 may tilt or move in the axial direction due to a gap in the fitting portion.
本考案は上述の従来の問題に鑑み極めて安定か
つ確実な副反射鏡の取付けを実現したアンテナの
提供を目的とし、このため本考案は主反射鏡部か
ら少なくとも3本の支脚で支持せられる副反射鏡
支持装置、該支持装置はその中心に前記反射鏡鏡
面の反対裏面側から一体かつ同軸に突出する断面
円形の案内部を嵌合する凹部とねじ軸を螺合する
ねじ孔を具え、さらに前記支脚端部を直状に嵌合
し固定する孔を有してなり、該ねじ軸にロツクナ
ツトを設け、前記副反射鏡ねじ軸の螺合回転によ
り該副反射鏡面を主反射鏡に対し軸方向にその距
離を調節およびロツク可能としている。このよう
な構成であるから軸方向の距離調節も安定に行な
い得る。本考案による実施例につき以下図面を参
照して説明する。 In view of the above-mentioned conventional problems, the purpose of the present invention is to provide an antenna in which a sub-reflector can be mounted extremely stably and reliably.For this purpose, the present invention has developed a sub-reflector that is supported by at least three supporting legs from the main reflector. a reflecting mirror support device, the supporting device having a screw hole in the center thereof into which a screw shaft is screwed into a recess into which a guide portion having a circular cross section that projects integrally and coaxially from the opposite back side of the mirror surface of the reflecting mirror is fitted; It has a hole in which the end of the support leg is fitted and fixed in a straight line, and a lock nut is provided on the screw shaft, and by screwing and rotating the sub-reflector screw shaft, the sub-reflector surface is axially aligned with respect to the main reflector. The distance can be adjusted and locked in any direction. With such a configuration, the distance adjustment in the axial direction can be performed stably. Embodiments of the present invention will be described below with reference to the drawings.
第3図に本考案の一実施例アンテナの概略側面
図を、第4図に副反射鏡取付け部の断面図を示
す。図において主反射鏡1はその背面に取付け枠
1′を一体的に構成しており、凹面(回転抛物
面)と対向して所定位置に副反射鏡20が対設さ
れる。この副反射鏡20はその鏡面と反対裏面2
1側に一体で同軸上に突出する断面円形の案内部
22とねじ軸23を具えて、ねじ軸23の端部に
は溝24が形成されている。上記副反射鏡20の
裏面側21にあつて側断面がほぼ台形で一端中央
部に上記案内部22を嵌合する凹部25と、凹部
25底面に他端に貫通するねじ孔26が形成せら
れており、さらに周辺の台形面から直角に図の場
合3個所(但し図は2個所のみ示す)後述する支
脚端を嵌合する孔27が開けられている副反射鏡
支持装置30が上記副反射鏡20を螺合装着して
いる。3本の支脚40は一端が段付きに形成され
てその細径部41が孔27に嵌合挿入され支持装
置の他端凹部斜面から挿入されたねじ42によつ
てそれぞれ固定される。この支脚40は支持装置
30のほぼ台形斜面に直角に嵌合するため精度よ
くかつ強固安定に取着される。また他端43は主
反射鏡1の面にねじ44によつて取着される。な
お、45はロツクナツトである。上記主反射鏡は
周知の板金へら絞り加工法によつて製せられ取付
け枠1′とは溶接等手段によつて結合されてい
る。 FIG. 3 shows a schematic side view of an antenna according to an embodiment of the present invention, and FIG. 4 shows a cross-sectional view of the sub-reflector attachment part. In the figure, a main reflecting mirror 1 has a mounting frame 1' integrally formed on its back surface, and a sub-reflecting mirror 20 is disposed at a predetermined position facing a concave surface (rotating rod surface). This sub-reflector 20 has a back surface 2 opposite to the mirror surface.
A guide portion 22 having a circular cross section and a threaded shaft 23 are provided on one side and integrally protrude coaxially, and a groove 24 is formed at the end of the threaded shaft 23. On the back side 21 of the sub-reflector 20, a recess 25 having a substantially trapezoidal side cross section and into which the guide portion 22 fits is formed in the center of one end, and a screw hole 26 penetrating the other end in the bottom of the recess 25. The sub-reflector support device 30 has three holes 27 in the figure (however, only two are shown in the figure) perpendicular to the surrounding trapezoidal surface for fitting the supporting leg ends, which will be described later. A mirror 20 is screwed together. One end of the three supporting legs 40 is stepped, and the narrow diameter portion 41 of the three supporting legs 40 is fitted into the hole 27 and fixed by a screw 42 inserted from the slope of the recessed portion of the other end of the supporting device. This supporting leg 40 is fitted at right angles to the substantially trapezoidal slope of the supporting device 30, so that it is mounted accurately, firmly and stably. The other end 43 is attached to the surface of the main reflecting mirror 1 with a screw 44. Note that 45 is a lock nut. The main reflecting mirror is manufactured by a well-known sheet metal drawing process and is connected to the mounting frame 1' by means such as welding.
上記構成で凹溝24に適当なねじ回し等の工具
を当てがい矢印Bの何れかの方向に回転させると
ねじ孔26に螺合しているねじ軸23が回転し、
これに伴なつて一体の副反射鏡20は回転しなが
ら軸方向に移動する。このとき案内部22は凹部
25と適合し嵌合状態で軸方向に正確に案内支持
するから副反射鏡の軸が傾くことが極めて少なく
なるよう維持される。また副反射鏡位置が所定位
置に達した所でロツクナツト45を緊締しねじ軸
23をロツクする。なお前記構成において支脚4
0を含む全体を副反射鏡20の位置が誤差を含み
調節を要する範囲内は少なくとも可動し得るよう
ねじ部23と案内部22の嵌合が十分に確保され
るようになつている。 With the above configuration, when a suitable tool such as a screwdriver is applied to the groove 24 and rotated in either direction of the arrow B, the screw shaft 23 screwed into the screw hole 26 rotates.
Along with this, the integral sub-reflector 20 moves in the axial direction while rotating. At this time, the guide portion 22 fits into the recess 25 and in the fitted state provides accurate guidance and support in the axial direction, so that the axis of the sub-reflector is maintained so as to be extremely unlikely to tilt. Further, when the sub-reflector position reaches a predetermined position, the lock nut 45 is tightened to lock the screw shaft 23. In addition, in the above configuration, the support leg 4
The fitting between the threaded part 23 and the guide part 22 is sufficiently ensured so that the position of the sub-reflector 20 as a whole including zero can be moved at least within a range that includes errors and requires adjustment.
上述のように本考案によれば一体の支持装置部
が極めて高精度に副反射鏡を案内支持するととも
に支脚が直状に嵌合しているから主反射鏡に対し
てその軸方向は正確に定められ、事実ほとんど誤
差なく製し得ることができ、そのため事実上の角
度調節を要しないことが確認されている。従つて
所定距離間隔とすることを能率的に設定するため
に第5図のように主反射器1の一次放射器取付け
孔部にここを基準とした距離設定用治具50をピ
ン・ねじ51を用いて取着し、その先端部52の
凹穴54の底面が副反射鏡20の中央に形成され
ているバーテツクスプレート(頂面整合板)28
の面と接するように前記操作で調節すれば高能率
におこなえる。もちろん治具50の取着部フラン
ジ面53と先端52の凹穴54の底面との間の長
さが所定距離に定められていることはいうまでも
ない。なお、プレート28の外径と凹穴54のは
まり具合から偏心の状況も確認して補正も可能で
ある。そうして位置の調節固定が完了した後治具
50を外し所定に一次放射器を取り付け装置要部
に取着する。 As mentioned above, according to the present invention, the integrated support device guides and supports the sub-reflector with extremely high precision, and since the supporting legs are fitted in a straight line, the axial direction of the sub-reflector can be accurately aligned with respect to the main reflector. It has been confirmed that it can be manufactured with virtually no errors and that virtually no angle adjustment is required. Therefore, in order to efficiently set the predetermined distance intervals, as shown in FIG. A vertex plate (top alignment plate) 28 whose bottom surface of the recessed hole 54 in the tip portion 52 is formed in the center of the sub-reflector 20.
This can be done with high efficiency by adjusting the above operation so that it is in contact with the surface. Of course, it goes without saying that the length between the attachment flange surface 53 of the jig 50 and the bottom surface of the recessed hole 54 of the tip 52 is determined to be a predetermined distance. It is also possible to check and correct the eccentricity based on the fit between the outer diameter of the plate 28 and the recessed hole 54. After the adjustment and fixing of the position is completed, the jig 50 is removed and the primary radiator is attached to the main part of the attachment device in a predetermined position.
本考案は以上のようにして比較的小形で固定・
可搬形・さらには車輛等搭載装置のアンテナに実
施して優れた効果を示す。 As described above, the present invention is relatively small and fixed.
It has shown excellent effects when applied to portable antennas and even to antennas mounted on vehicles.
第1図はカセグレンアンテナの基本的構成断面
図、第2図は従来の副反射鏡取付構造、第3図は
本考案アンテナの一実施例概略側面図、第4図は
同じく副反射鏡取付部の一実施例断面図、第5図
は治具を用いた調節方法の説明図。
図中、1は主反射鏡、2は一次放射器、20は
副反射鏡、30は支持装置、40は支脚、50は
治具を示す。
Fig. 1 is a sectional view of the basic configuration of a Cassegrain antenna, Fig. 2 is a conventional sub-reflector mounting structure, Fig. 3 is a schematic side view of an embodiment of the antenna of the present invention, and Fig. 4 is the sub-reflector mounting section. FIG. 5 is an explanatory diagram of an adjustment method using a jig. In the figure, 1 is a main reflector, 2 is a primary radiator, 20 is a sub-reflector, 30 is a support device, 40 is a supporting leg, and 50 is a jig.
Claims (1)
られる副反射鏡支持装置、該支持装置はその中心
に前記副反射鏡面の反対裏面側から一体かつ同軸
に突出する断面円形の案内部を嵌合する凹部とね
じ軸を螺合するねじ孔を具え、さらに周辺に前記
支脚端部を直状に嵌合し固定する孔を有してな
り、該ねじ軸にロツクナツトを設け、前記副反射
鏡ねじ軸の螺合回転により該副反射鏡面を主反射
鏡に対し軸方向にその距離を調節およびロツク可
能としたカセグレンアンテナ。 A sub-reflector support device supported by at least three supporting legs from the main reflector part, and a guide portion having a circular cross section that protrudes integrally and coaxially from the back side opposite to the sub-reflector surface is fitted in the center of the support device. The screw shaft is provided with a recess and a screw hole into which the screw shaft is screwed, and a hole around the periphery into which the end of the support leg is fitted and fixed in a straight line, and a lock nut is provided on the screw shaft, and the screw shaft is screwed into the screw shaft. A Cassegrain antenna whose distance can be adjusted and locked in the axial direction of the sub-reflector surface with respect to the main reflector by screwing and rotating the shaft.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1980052698U JPS62267Y2 (en) | 1980-04-18 | 1980-04-18 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1980052698U JPS62267Y2 (en) | 1980-04-18 | 1980-04-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56155509U JPS56155509U (en) | 1981-11-20 |
JPS62267Y2 true JPS62267Y2 (en) | 1987-01-07 |
Family
ID=29647541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1980052698U Expired JPS62267Y2 (en) | 1980-04-18 | 1980-04-18 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62267Y2 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS503247A (en) * | 1973-05-12 | 1975-01-14 | ||
JPS5230141A (en) * | 1975-09-01 | 1977-03-07 | Nippon Telegr & Teleph Corp <Ntt> | Beam width variable antenna of ariable feeding position type |
JPS534751U (en) * | 1976-06-30 | 1978-01-17 |
-
1980
- 1980-04-18 JP JP1980052698U patent/JPS62267Y2/ja not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS503247A (en) * | 1973-05-12 | 1975-01-14 | ||
JPS5230141A (en) * | 1975-09-01 | 1977-03-07 | Nippon Telegr & Teleph Corp <Ntt> | Beam width variable antenna of ariable feeding position type |
JPS534751U (en) * | 1976-06-30 | 1978-01-17 |
Also Published As
Publication number | Publication date |
---|---|
JPS56155509U (en) | 1981-11-20 |
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