JPS60252863A - Rotary driving gear - Google Patents

Rotary driving gear

Info

Publication number
JPS60252863A
JPS60252863A JP10884884A JP10884884A JPS60252863A JP S60252863 A JPS60252863 A JP S60252863A JP 10884884 A JP10884884 A JP 10884884A JP 10884884 A JP10884884 A JP 10884884A JP S60252863 A JPS60252863 A JP S60252863A
Authority
JP
Japan
Prior art keywords
rotating shaft
arm
drive device
shaft
cylinder
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.)
Pending
Application number
JP10884884A
Other languages
Japanese (ja)
Inventor
Masahiro Wada
和田 全浩
Sumio Hayamizu
速水 澄男
Tadayuki Akizuki
秋月 忠幸
Kazuo Ito
伊藤 一雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Mitsubishi Electric Corp
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp, Nippon Telegraph and Telephone Corp filed Critical Mitsubishi Electric Corp
Priority to JP10884884A priority Critical patent/JPS60252863A/en
Publication of JPS60252863A publication Critical patent/JPS60252863A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/02Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • F15B15/06Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

PURPOSE:To enable a rotated member to be easily turned fully in the whole directions, by supporting a swivelling arm, turned by a reciprocating hydraulic cylinder, around a shaft of the rotated member and removably stopping the swivelling arm to the rotated member by blots. CONSTITUTION:A swivelling arm secures to its arm part 13 a rod 8b of a reciprocating cylinder through a pin 10, and this swivelling arm is secured to a rotated shaft around its periphery by bolts 14 so as to enable the rotated shaft 4 to be driven. When the rotated shaft is turned to an extending and contracting range or above of the reciprocating cylinder, the cylinder, once it is extended to the maximum limit of extension, is contracted by removing the bolt. At this point of time, the bolt is retightened, and similar operation is repeated. Here the cylinder rod, being supported to the swivelling arm, never applies force in the direction of gravity to the cylinder.

Description

【発明の詳細な説明】 この発明は例えばアンテナ反射鏡を支持するAZ (A
zimuth )軸を伸縮する駆動装置とレバーブロッ
クでもって回転駆動する回転駆動装置に関するものであ
る。。
DETAILED DESCRIPTION OF THE INVENTION This invention provides, for example, an AZ (A
zimuth) This relates to a drive device that extends and contracts a shaft and a rotation drive device that rotates and drives a lever block. .

従来この種回転駆動装置として考えられていたものを第
1図乃至第8図について説明する。
What has been conventionally considered as this type of rotary drive device will be explained with reference to FIGS. 1 to 8.

第1図はその構成図であり、第2図および第8図は第1
図の1−1断面および璽−■断面である。
Figure 1 is its configuration diagram, and Figures 2 and 8 are the
These are the 1-1 cross section and the 1-2 cross section in the figure.

図において(1)はアンテナ反射鏡であり背面に固着さ
れた一対の支持腕(1a)、(1b)によりテフロン等
ノシートベアリング(2a)によりE L(ELeva
t ion )軸(2)にその軸まわりに回転自在に支
持されている。
In the figure, (1) is an antenna reflector, and a pair of support arms (1a) and (1b) fixed to the back surface are connected to the E L (ELeva) by a Teflon sheet bearing (2a).
t ion ) is supported on the shaft (2) so as to be rotatable around the shaft.

(3)はアンテナ反射鏡(1)をEL軸(2)まわりに
回転させる油圧シリンダや電動式ジヤツキ等からなるE
L駆動装置、(4)はアンテナ反射鏡(1)を支持する
EL軸(2)と上記EL駆動装置(3)を支持するAZ
(AZ imath )軸でありEL軸取付部(4a)
と上部軸部(4b)と中間部(4C)および下部軸部(
4d)とで構成され、これら各部はそれぞれに設けられ
た鍔部をボルト(4e)にて固着することにより結合さ
れている。(5)は支持棒であり、一端部が地上に固定
され他端部にはAZ軸(4)の上部軸部(4b)をテフ
ロン等のシートベアリング(6b)を介し回転自在に支
持する軸受(5a)を備えている。(6)は地上に固定
されたAZ軸受であり、ベアリング(6a)を介し上記
AZ軸(4)の下部軸部(4d)を回転自在に支持する
。(7)はAZ軸(4)の下部軸部(4d)の鍔部に溶
接等によって固着された扇形の腕、(8)は油圧シリン
ダや電動式ジヤツキ等のAZ駆動装置であり、地上に固
定された支持台(8a)とこの支持台(8a)に一端部
がビン(8C)により回転自在に取付けられ他端部が腕
(7)の外周部に設けられた取付孔(7a)にボルト(
7b)で固着された継手(9)にピンQlにより回転自
在に取付けられ伸縮するシリンダ(8b)とにより構成
されている。
(3) is an E consisting of a hydraulic cylinder, electric jack, etc. that rotates the antenna reflector (1) around the EL axis (2).
The L drive device (4) is an EL axis (2) that supports the antenna reflector (1) and an AZ that supports the EL drive device (3).
(AZ imath) Axis and EL axis mounting part (4a)
and the upper shaft part (4b), the middle part (4C), and the lower shaft part (
4d), and these parts are connected by fixing the respective flanges with bolts (4e). (5) is a support rod, one end of which is fixed to the ground, and the other end of which is a bearing that rotatably supports the upper shaft part (4b) of the AZ axis (4) via a seat bearing (6b) made of Teflon or the like. (5a). (6) is an AZ bearing fixed on the ground, which rotatably supports the lower shaft portion (4d) of the AZ shaft (4) via the bearing (6a). (7) is a fan-shaped arm fixed to the flange of the lower shaft part (4d) of the AZ axis (4) by welding, etc., and (8) is an AZ drive device such as a hydraulic cylinder or electric jack, which is mounted on the ground. One end is rotatably attached to the fixed support stand (8a) with a bottle (8C), and the other end is attached to the attachment hole (7a) provided on the outer periphery of the arm (7). bolt(
The cylinder (8b) is rotatably attached to the joint (9) fixed by the joint (7b) by a pin Ql, and extends and contracts.

このような構成において、AZ軸(4)をその軸まわり
に一定角度範囲だけ反時計方向または時計方向に回転す
る場合は、シリンダ(8b)を可能な限り伸長あるいは
収縮させ、上記一定角度所定方向に回転した後ボルト(
7b)を外し、シリンダ(8b)の支持台(8a)との
結合部に大きな力が加わらないようシリンダ(8b)を
手で持ち、しかる後継手(9)が隣接する取付孔(7a
)に適合するまでシリンダ(8b)を前回とは逆方向に
作動させボルト(7b)で継手(9)を固着する。そし
て再びAZ駆動装置(8)を作動する工程を繰り返すこ
とによりAZ軸(4)はその軸まわりに上記一定角度範
囲以上回転する。
In such a configuration, when rotating the AZ axis (4) counterclockwise or clockwise by a certain angle range around the axis, the cylinder (8b) is extended or contracted as much as possible, After rotating the bolt (
7b), hold the cylinder (8b) with your hand so as not to apply a large force to the connection part of the cylinder (8b) with the support base (8a), and use the appropriate successor hand (9) to insert the cylinder (8b) into the adjacent mounting hole (7a).
), operate the cylinder (8b) in the opposite direction from the previous time and secure the joint (9) with the bolt (7b). By repeating the process of activating the AZ drive device (8) again, the AZ axis (4) rotates around the axis beyond the above-mentioned predetermined angle range.

このようにAZ軸(4)は回転するが一定角度範囲以上
回転させる場合、重量物であるAZ駆動装置(3)を人
が支えなければならないので作業性が悪く、かつ多くの
時間を要するという欠点があった。
The AZ axis (4) rotates in this way, but if it is rotated beyond a certain angle range, the AZ drive device (3), which is a heavy object, must be supported by a person, which is difficult to work with and takes a lot of time. There were drawbacks.

この考案はこのような点にかんがみてなされたもので、
AZ駆動装置を人が支えることhく回転軸を一定角度範
囲以上回転することができる回転駆動装置を提供するも
のである。
This idea was made in consideration of these points,
To provide a rotational drive device that can rotate a rotation shaft over a certain angle range without having to be supported by a person.

この発明の一実施例を第4図および第6図により説明す
る。第5図は第4図のV−■断面図である。図において
第1図乃至第8図と同一符号は同一または相当部分を示
す。(ロ)はAZ軸(4)の下部軸部(4d)の鍔部に
ボルト(2)によって固着されたリング、(至)は上記
リング(ロ)と係合してAZ軸まわりに回転する腕であ
り、この腕(至)と上記リングα玲との係合部には同一
円周上に等間隔でもづてボルト挿入孔(18a)、 (
lla)が設けられており、このボルト挿入孔(18a
)、 (lla)を貫通するボルトO→ににより上記腕
(至)はリング(ロ)に固着されAZ軸(4)と共にA
Z軸まわりに回転する。(至)はねじα・によりリング
0υに固着された案内板で、ボルトQ4を取外した時腕
斡がシリンダ(8b)の重みにより、リングQ◇から浮
上るのを防止し、かつこの状態で腕(至)がリングQ)
に係合しながらAZ軸(4)まわりにスムーズに回転で
きるよう案内するものである。Qカは支持台(8a)に
ボルト等によって固着された吊り金具、(至)は重量物
の移動等に使用されるレバーブロックである。(18a
)はレバーブロック(至)のビバーであり、一端部を上
記吊り金具Qηとシャックルα呻で連結され、他端部は
各々ワイヤ(20a)(20b)の端部に連結されてい
る。
An embodiment of this invention will be explained with reference to FIGS. 4 and 6. FIG. 5 is a sectional view taken along the line V--■ in FIG. 4. In the figures, the same reference numerals as in FIGS. 1 to 8 indicate the same or corresponding parts. (B) is a ring fixed to the flange of the lower shaft (4d) of the AZ axis (4) with a bolt (2), (to) is engaged with the ring (B) and rotates around the AZ axis. The arm is an arm, and the engagement portion between this arm and the ring α has bolt insertion holes (18a) arranged at equal intervals on the same circumference.
lla) is provided, and this bolt insertion hole (18a
), (lla) The arm (to) is fixed to the ring (b) by the bolt O → that passes through (lla), and the arm (to) is fixed to the ring (b) and A
Rotates around the Z axis. (to) is a guide plate fixed to ring 0υ by screw α・, which prevents the arm from floating up from ring Q◇ due to the weight of cylinder (8b) when bolt Q4 is removed. Arm (to) is ring Q)
This guides the shaft so that it can rotate smoothly around the AZ axis (4) while engaging with the shaft. Q is a hanging fitting fixed to the support base (8a) with bolts or the like, and (to) is a lever block used for moving heavy objects. (18a
) is a lever block (to), one end of which is connected to the hanging fitting Qη by a shackle α, and the other end connected to the ends of wires (20a) and (20b), respectively.

上記ワイヤ(20a)(20b)の一端部は下部軸部(
4d)から突設された取付板(2)にシャックル(2)
にて連結されている。
One end of the wires (20a) (20b) is connected to the lower shaft (
Attach the shackle (2) to the mounting plate (2) protruding from 4d).
are connected.

このような構成において、アンテナ反射鏡(1)を支持
するAZ軸(4)を一定角度範囲内回転する場合、AZ
駆動装置ii (8)を作動させ、シリンダ(8b)を
伸縮することにより腕に)はAZ軸(4)まわりに回転
力を受け、この腕(至)に固着されているAZ軸(4)
は反時計または時計方向に一定角度範囲回転し、例えば
第1図において左上方部に位置する静止衛星を追尾する
。今この静止衛星と反対側にある新静止衛星を追尾する
場合、即ちアンテナ反射鏡(1)を上記一定角度範囲以
上回転させる場合、即ち180度回板回転その方位位置
において一定角度範囲内回転させ上記静止衛星を追尾す
る場合は、ポル) Q4を外しレバーブロック(至)の
レバー(18a)を操作す゛) ) ることによりAZ軸(4)はワイヤ(20a)(2
0b)及び取付板(2)によりその軸まわりに180度
回板回転。この時シリンダ(8b)は腕(至)によって
支持されている。しかる後ボルトα◆により腕(2)と
リング(ロ)とを固着する。以上は180度回板回転る
場合について述べたが一定角度範囲を少し越える角度の
場合は、まずAZ駆動装置(8)を駆動し、シリンダ(
8b)を可能な限り伸長または収縮せしめAZ軸(4)
を反時計または時計方向に回転した後、ボルトQ→を外
しシリンダ(8b)を前回とは逆方向に回転させる。こ
の時シリンダ(8b)は腕(至)によって支持されてい
る。この状態において腕(2)をリング(ロ)を介しA
 Z @ (4)に固着し再びAZ駆動装置(8)を作
動する工程を繰返すことにより、AZ軸(4)はその軸
まわりに一定角度範囲以上回転する。新静止衛星の位置
、即ち回転角度により上記2方法から効率の良い方を選
択すればよい。
In such a configuration, when rotating the AZ axis (4) that supports the antenna reflector (1) within a certain angle range, the AZ
By operating the drive device ii (8) and extending and contracting the cylinder (8b), the arm) receives a rotational force around the AZ axis (4), and the AZ axis (4) fixed to this arm (to)
rotates counterclockwise or clockwise within a certain range of angles and tracks, for example, a geostationary satellite located at the upper left in FIG. If you want to track a new geostationary satellite on the opposite side of this geostationary satellite, that is, if you want to rotate the antenna reflector (1) beyond the above-mentioned certain angle range, that is, rotate the plate by 180 degrees and rotate it within a certain angle range at that azimuth position. When tracking the above geostationary satellite, remove Pole Q4 and operate the lever (18a) of the lever block (to).
0b) and the mounting plate (2) rotate the turntable 180 degrees around its axis. At this time, the cylinder (8b) is supported by the arm (to). After that, secure the arm (2) and ring (b) with bolt α◆. The above description has been about the case where the rotary plate rotates 180 degrees, but if the angle slightly exceeds a certain angle range, first drive the AZ drive device (8) and rotate the cylinder (
8b) as much as possible to extend or contract the AZ axis (4)
After rotating the cylinder (8b) counterclockwise or clockwise, remove the bolt Q→ and rotate the cylinder (8b) in the opposite direction. At this time, the cylinder (8b) is supported by the arm (to). In this state, connect arm (2) to A through ring (b).
By repeating the process of fixing to Z @ (4) and activating the AZ drive device (8) again, the AZ axis (4) rotates around the axis over a certain angle range. The more efficient method may be selected from the above two methods depending on the position of the new geostationary satellite, that is, the rotation angle.

なお案内板(ト)は第5図に一実施例を示したがこれに
限らず、第6図のように案内板(15a)をねじ(16
a)にて下部軸部(4d)に固着してもその効果が変ら
ないことは明白である。
Although one embodiment of the guide plate (G) is shown in FIG. 5, the guide plate (15a) is not limited to this as shown in FIG.
It is clear that the effect does not change even if it is fixed to the lower shaft part (4d) in a).

以上においてはアンテナ反射鏡(1)を支持するAZ軸
(4)の回転駆動について述べたがこれに限らず、例え
ば運搬機、建設機械の旋回テーブルに使用しても良い。
In the above description, the rotary drive of the AZ axis (4) supporting the antenna reflector (1) has been described, but the present invention is not limited to this, and may be used, for example, in a turning table of a transporter or a construction machine.

以上のようにこの発明によればレバーブロックおよび伸
縮する駆動装置でもって回転軸を容易に所望の角度回転
することができる。
As described above, according to the present invention, the rotating shaft can be easily rotated to a desired angle using the lever block and the extendable drive device.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は従来の回転駆動装置を示す構成図、第2図は第
1図のI−1断面図、第8図は第1図の1−璽断面図、
第4図はこの発明の一実施例を示す断面図、第6図は第
4図の■−■断面図、第6図はこの考案の他の実施例を
示す断面図である。 図において、(4)はAZM、(6)はAZ軸受、(6
a)はベアリング、(8)は駆動装置、Qηはリング、
餞は腕、Q4はボルト、(ト)は案内板、(至)はレバ
ーブロック。 なお図中同一符号は同一または相当部分を示すものとす
る。 第1rM 第2図 第5図 第6図
Fig. 1 is a configuration diagram showing a conventional rotary drive device, Fig. 2 is a sectional view taken along line I-1 in Fig. 1, and Fig. 8 is a sectional view taken along line 1-1 in Fig. 1.
FIG. 4 is a sectional view showing one embodiment of the present invention, FIG. 6 is a sectional view taken along the line -■ in FIG. 4, and FIG. 6 is a sectional view showing another embodiment of the invention. In the figure, (4) is AZM, (6) is AZ bearing, (6
a) is a bearing, (8) is a drive device, Qη is a ring,
餞 is the arm, Q4 is the bolt, (g) is the guide plate, and (to) is the lever block. Note that the same reference numerals in the figures indicate the same or corresponding parts. 1rM Figure 2 Figure 5 Figure 6

Claims (6)

【特許請求の範囲】[Claims] (1)基礎体に回転自在に設けられた回転軸、この回転
軸にその軸まわりに回転可能に取付けられた腕、この腕
を上記回転軸に固着する手段、上記腕と上記基礎体とに
両端部がそれぞれ回転自在に取付けられ、上記手段によ
り上記腕が回転軸に固着されているときにこの回転軸を
その軸まわりに回転させ得る伸縮可能な駆動装置、上記
基礎体と上記回転軸との間に設けられ、上記腕と回転軸
との固着が解除されているときに上記回転軸をその軸ま
わりに回転させ得るレバーブロックを備え、このレバー
ブロック及び上記駆動装置のいずれによっても上記回転
軸をその軸まわりに回転せしめるようにしたことを特徴
とする回転駆動装置。
(1) A rotating shaft rotatably provided on the base body, an arm rotatably attached to the rotating shaft around the axis, means for fixing the arm to the rotating shaft, and a means for fixing the arm to the base body. an extendable drive device having both ends rotatably attached to each, and capable of rotating the rotating shaft about the rotating shaft when the arm is fixed to the rotating shaft by the means; the base body and the rotating shaft; A lever block is provided between the arm and the rotating shaft, and is capable of rotating the rotating shaft about the rotating shaft when the arm and the rotating shaft are released from each other, and the lever block and the driving device do not cause the rotation. A rotary drive device characterized by rotating a shaft around the shaft.
(2)駆動装置は、その1回の伸又は縮動作により回転
軸をその軸まわりに所定角度範囲内で回転させるもので
あり、その動作を複数回行なうことにより所定角度以上
回転軸をその軸まわりに回転させ得るようにしたことを
特徴とする特許請求の範囲第1項記載の回転軸駆動装置
(2) The drive device rotates the rotating shaft around the axis within a predetermined angle range by one extension or contraction operation, and by performing this operation multiple times, the rotating shaft can be rotated by a predetermined angle or more. 2. The rotary shaft drive device according to claim 1, wherein the rotary shaft drive device is configured to be able to rotate around the rotary shaft.
(3)レバーブロックは、駆動装置の1回の伸又は縮動
作による回転軸の回転角度より大きな角度範囲で回転軸
をその軸まわりに回転させ得るものであることを特徴と
する特許請求の範囲第1項記載の回転駆動装置。
(3) Claims characterized in that the lever block is capable of rotating the rotating shaft around the axis within a larger angular range than the rotation angle of the rotating shaft caused by one extension or contraction operation of the drive device. The rotary drive device according to item 1.
(4)レバーブロックによる回転角度範囲は約180度
であることを特徴とする特許請求の範囲第8項記載の回
転駆動装置。
(4) The rotary drive device according to claim 8, wherein the rotation angle range by the lever block is approximately 180 degrees.
(5)腕を回転軸に固着する手段は、回転軸に固定され
たリングと、このリングと腕の周縁部を案内する案内板
と、上記リングと腕とを結合し得るボルトとを備えたこ
とを特徴とする特許請求の範囲第1項ないし第4項のい
ずれかに記載の回転駆動装置。
(5) The means for fixing the arm to the rotating shaft includes a ring fixed to the rotating shaft, a guide plate that guides the ring and the peripheral edge of the arm, and a bolt that can connect the ring and the arm. A rotary drive device according to any one of claims 1 to 4, characterized in that:
(6)腕を回転軸に固着する手段は1回転軸に固定され
たリングと、このリングを案内する案内板と、上記リン
グと腕とを結合し得るボルトとを備えたことを特徴とす
る特許請求の範囲第1項ないし第4項のいずれかに記載
の回転駆動装置。
(6) The means for fixing the arm to the rotating shaft is characterized by comprising a ring fixed to the rotating shaft, a guide plate for guiding this ring, and a bolt capable of connecting the ring and the arm. A rotary drive device according to any one of claims 1 to 4.
JP10884884A 1984-05-29 1984-05-29 Rotary driving gear Pending JPS60252863A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10884884A JPS60252863A (en) 1984-05-29 1984-05-29 Rotary driving gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10884884A JPS60252863A (en) 1984-05-29 1984-05-29 Rotary driving gear

Publications (1)

Publication Number Publication Date
JPS60252863A true JPS60252863A (en) 1985-12-13

Family

ID=14495116

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10884884A Pending JPS60252863A (en) 1984-05-29 1984-05-29 Rotary driving gear

Country Status (1)

Country Link
JP (1) JPS60252863A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5850257B2 (en) * 1974-08-16 1983-11-09 ヘミツシエ ヴエルケ ヒユ−ルス アクチエンゲゼルシヤフト Method for producing non-viscous flowable powdery com-base compound containing filler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5850257B2 (en) * 1974-08-16 1983-11-09 ヘミツシエ ヴエルケ ヒユ−ルス アクチエンゲゼルシヤフト Method for producing non-viscous flowable powdery com-base compound containing filler

Similar Documents

Publication Publication Date Title
KR950031399A (en) Industrial Robot
CA2047282A1 (en) Attitude control device and drilling-direction control device
FR2832345B1 (en) ARTICULATED MECHANISM COMPRISING A CABLE REDUCER FOR USE IN A ROBOT ARM
CN102649269A (en) Manipulator robot
US5850704A (en) Assembly for the attachment of an accessory to a boom of a working machine
JP2001150382A (en) Guide device of wiring member and/or piping member, and robot having the same
JPS60252863A (en) Rotary driving gear
JPH0523895B2 (en)
JPS6030509Y2 (en) Rotary shaft drive device
JPS6030510Y2 (en) Rotary shaft drive device
US5921353A (en) Adjustable lifting sling
JPS5874299A (en) Inverting device for welding
JPH0115514Y2 (en)
SU1113355A1 (en) Lift for servicing inner surfaces of spherical vessel
JPH0439272Y2 (en)
JPH0411032Y2 (en)
SU1207998A1 (en) Device for turning and changing overhang of crane boom
JPH0351115Y2 (en)
SU1266835A1 (en) Swivelling arrangement of boom cargo-hoisting facility
JPS61229707A (en) Device for turning fitting material
JPS61212902A (en) Driver for moving antenna
JPH0415075B2 (en)
JPH0763870B2 (en) Rotation support device
RU2059566C1 (en) Outrigger of load-lifting machine
JPH0419849Y2 (en)