JP3643734B2

JP3643734B2 - Thruster lifting device

Info

Publication number: JP3643734B2
Application number: JP23485999A
Authority: JP
Inventors: 文和坂井
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 1999-08-23
Filing date: 1999-08-23
Publication date: 2005-04-27
Anticipated expiration: 2019-08-23
Also published as: JP2001058599A

Description

【０００１】
【発明の属する技術分野】
本発明は、作業船を定点に位置させるためのスラスタを昇降する装置に関するものである。
【０００２】
【従来の技術】
ボーリング等の作業を行なう作業船は、風や潮流等によって流されることなく船体を常に定点に位置させる必要がある。そこで、この種の作業船では、船底から複数のスラスタ（推進器）を突出させ、それらのプロペラの回転による推進力によって船体を所定の作業位置に位置決めするようにしている。
【０００３】
このスラスタは、定期的に補修、点検する必要がある。そこで、従来においては、潜水夫が補修、点検すべきスラスタを支持体から取外し、そのスラスタを海上クレーンで船上まで運ぶようにしている。なお、補修、点検を終了したスラスタは、海上クレーンを用いて元の位置まで運ばれた後、再び潜水夫によって支持体に取付けられる。
【０００４】
【発明が解決しようとする課題】
上記スラスタの取付け取外し作業および移動作業は、人手と多大の費用および時間を必要とする。なお、ドライドックまで作業船を移動し、そこで、スラスタの補修、点検あるいは交換を行なうことも考えられるが、この場合にも多大の費用と時間を要することになる。
本発明の課題は、このような状況に鑑み、海上クレーン等の大型の昇降移動機械を用いることなくスラスタを船上まで移動させることができるスラスタ昇降装置を提供することにある。
【０００５】
【課題を解決するための手段】
第１の発明は、下面から突出する態様でスラスタを支持した昇降体と、該昇降体を昇降移動させるために船体を上下に貫通して設けた孔部と、を備え、前記昇降体を船底の下方において１８０度垂直面内で回転した後、前記スラスタが甲板上に位置されるまで前記昇降体を上昇させ、前記昇降体の下降後、前記昇降体を船底の下方において１８０度垂直面内で回転させるスラスタの昇降装置であって、前記垂直面に平行する前記昇降体の一方の側面の上方部および下方部の対応位置にそれぞれ設けられた第１の吊金具および第２の吊金具と、前記垂直面に直交する前記昇降体の一方の側面の上方部および下方部の対応位置にそれぞれ設けられた第３の吊金具および第４の吊金具と、前記垂直面に平行する前記昇降体の他方の側面の上方部および下方部の対応位置にそれぞれ設けられた第５の吊金具および第６の吊金具と、前記孔部の上方に固定配設され、第１の吊金具および第２の吊金具に向けて第１のワイヤを垂下する第１の滑車と、前記孔部の上方において前記垂直面に沿って水平移動可能に配設され、前記第３の吊金具および第４の吊金具に向けて第２のワイヤを垂下する第２の滑車と、前記孔部の上方において前記垂直面に沿って水平移動可能に配設され、前記第５の吊金具および第６の吊金具に向けて第３のワイヤを垂下する第３の滑車と、前記第１のワイヤ、第２のワイヤおよび第３のワイヤにそれぞれ接続された第１、第２および第３のウインチと、を備え、前記第１の吊金具、第３の吊金具および第５の吊金具は、それらを結ぶことによって形成される三角形の中に前記昇降体の重心位置を通る上下軸線が位置されるようにそれぞれの配設位置が設定され、前記スラスタが下方に位置した状態の前記昇降体の第２の吊金具、第３の吊金具および第５の吊金具に、前記垂下された第１のワイヤ、第２のワイヤおよび第３のワイヤをそれぞれ接続し、前記スラスタが上方に位置した状態の前記昇降体の第１の吊金具、第４の吊金具および第６の吊金具に、前記垂下された第１のワイヤ、第２のワイヤおよび第３のワイヤをそれぞれ接続するようにしている。
第２の発明は、下面から突出する態様でスラスタを支持した昇降体と、該昇降体を昇降移動させるために船体を上下に貫通して設けた孔部と、を備え、前記昇降体を船底の下方において１８０度垂直面内で回転した後、前記スラスタが甲板上に位置されるまで前記昇降体を上昇させ、前記昇降体の下降後、前記昇降体を船底の下方において１８０度垂直面内で回転させるスラスタの昇降装置であって、前記垂直面に平行する前記昇降体の一方の側面の上方部に設けられた第１の吊金具と、前記垂直面に平行する前記昇降体の他方の側面の下方部において、前記垂直面に平行する前記昇降体の中央断面に対して前記第１の吊金具と点対称な位置に設けられた第２の吊金具と、前記垂直面に直交する前記昇降体の一方の側面の上方部に設けられた第３の吊金具と、
前記垂直面に直交する前記昇降体の一方の側面の下方部において、前記昇降体の中央断面に対して前記第３の吊金具と点対称な位置に設けられた第４の吊金具と、前記垂直面に平行する前記昇降体の一方の側面の上方部に設けられた第５の吊金具と、前記垂直面に平行する前記昇降体の他方の側面の下方部において、前記昇降体の中央断面に対して前記第５の吊金具と点対称な位置に設けられた第６の吊金具と、前記孔部の上方に固定配設され、前記第１の吊金具に向けて第１のワイヤを垂下する第１の滑車と、前記孔部の上方に固定配設され、前記第２の吊金具に向けて第２のワイヤを垂下する第２の滑車と、前記孔部の上方において前記垂直面に沿って水平移動可能に配設され、前記第３の吊金具に向けて第３のワイヤを垂下する第３の滑車と、前記孔部の上方において前記垂直面に沿って水平移動可能に配設され、前記第４の吊金具に向けて第４のワイヤを垂下する第４の滑車と、前記孔部の上方において前記垂直面に沿って水平移動可能に配設され、前記第５の吊金具に向けて第５のワイヤを垂下する第５の滑車と、前記孔部の上方において前記垂直面に沿って水平移動可能に配設され、前記第６の吊金具に向けて第６のワイヤを垂下する第６の滑車と、前記第１のワイヤ、第２のワイヤ、第３のワイヤ、第４のワイヤ、第５のワイヤおよび第６のワイヤにそれぞれ接続された第１、第２、第３、第４、第５および第６のウインチと、を備え、前記第１の吊金具、第４の吊金具および第６の吊金具は、それらを結ぶことによって形成される三角形の中に前記昇降体の重心位置を通る上下軸線が位置されるように、かつ、前記第２の吊金具、第３の吊金具および第５の吊金具は、それらを結ぶことによって形成される三角形の中に前記昇降体の重心位置を通る上下軸線が位置されるように、それぞれの配設位置が設定され、前記第１の吊金具、第２の吊金具、第３の吊金具、第４の吊金具、第５の吊金具および第６の吊金具に前記垂下された第１のワイヤ、第２のワイヤ、第３のワイヤ、第４のワイヤ、第５のワイヤおよび第６のワイヤをそれぞれ接続するようにしている。
【０００６】
【発明の実施の形態】
図１および図２は、それぞれ本発明に係るスラスタ昇降装置を概略的に示した正面図および側面図である。
図１において、推進器たるスラスタ１は、水密な構造を有する中空立方体状のコンテナ２の下面に取付られている。
【０００７】
コンテナ２は、スラスタ１のプロペラ１ａを回転駆動するためのモータ３を内蔵し、かつ、その上部外側に吊金具５Ａ，５Ｂおよび５Ｃを設けるとともに、下部外側における対応位置に吊金具５Ａ’５Ｂ’および５Ｃ’を設けてある。
図３に示したように、吊金具５Ａ（５Ａ’），５Ｂ（５Ｂ’）および５Ｃ（５Ｃ’）は、それぞれコンテナ２の前側面中央部、左側面の後方側および後側面の右端に設けられている。このような位置に各吊金具５Ａ（５Ａ’），５Ｂ（５Ｂ’）および５Ｃ（５Ｃ’）を設ければ、これらの位置を結ぶ三角形中にコンテナの２の重心位置Ｇを通る上下軸線が位置されることになる。
【０００８】
作業船の船体６には、上記コンテナ２を昇降移動するための孔部７が上下に貫通している。また、この孔部７の上方には、図２に示すように、水平に延びる支持フレーム８Ａ，８Ｂおよび８Ｃが平行に配列している。
支持フレーム８Ａには、滑車９Ａが固定され、また、支持フレーム８Ｂおよび８Ｃには、それぞれ滑車９Ｂおよび９Ｃが移動可能に取付けられている。なお、支持フレーム８Ｂおよび８Ｃは、それぞれ滑車９Ｂおよび９Ｃをガイドするガイドレールとしての機能も有している。
【０００９】
甲板には、ウインチ１０Ａ，１８Ｂおよび１０Ｃが配設され、これらより繰出されたワイヤ１１Ａ，１１Ｂおよび１１Ｃがそれぞれ上記滑車９Ａ，９Ｂおよび９Ｃを介して上記孔部７内に垂下されている。
孔部７内に垂下されたワイヤ１１Ａ，１１Ｂおよび１１Ｃは、それらの下端をコンテナ２の吊金具５Ａ’，５Ｂおよび５Ｃにそれぞれ掛着して、該コンテナ２を水平に吊下げている。
【００１０】
以下、図４および図５を参照して、スラスタ１を点検、整備する場合における該スラスタ１の昇降手順について説明する。
１）スラスタ１の稼働時には、図４（ａ）に示すように、コンテナ２が下降端に位置された状態、つまり、スラスタ１が船底から突出した状態にある。
【００１１】
２）スラスタ１を点検、整備する際には、まず、図４（ｂ）に示すように、ウインチワイヤ１１Ａ，１１Ｂおよび１１Ｃを等速で繰出して、コンテナ２を船底の下方まで降下させる。
【００１２】
３）次に、ワイヤ１１Ｃを繰り出しながらワイヤ１１Ａを巻き上げ、その後、ワイヤ１１Ｂを繰出す。これにより、図４（ｃ）に示すように、コンテナ２が垂直面内で時計方向に回転する。そして、支持フレーム８Ｂが前記垂直面に沿って設けられていることから、このコンテナ２の回転に伴う吊金具５Ｂの右方向位置変化のために、滑車９Ｂが支持フレーム８Ｂによってガイドされながら右方向に移動する。
なお、吊金具５Ｂは、コンテナ２における回転方向側の面２ａとは逆の側の面２ｂに掛着されている（図３参照）。したがって、コンテナ２の回転に伴って該コンテナ２の周面にワイヤ１１Ｂが巻回される虞はない。
また、支持フレーム８Ａ，８Ｂおよび８Ｃが前記垂直面に直交する方向にずれて配列していることから、コンテナ２の回転に伴ってワイヤ１１Ａ，１１Ｂおよび１１Ｃ相互および滑車９Ａ，９Ｂおよび９Ｃ相互が干渉する虞もない。
【００１３】
４）上記コンテナ２の回転操作を継続して、図４（ｄ）に示すように、コンテナ２の上下を逆にする。このとき、吊金具５Ｂ，５Ｃの位置が入れ替わるために滑車９Ｂ，９Ｃの位置も入れ替わることになる。
【００１４】
５）ワイヤ１１Ａ，１１Ｂおよび１１Ｃを等速で巻き上げて、図４(ｅ)に示すように、スラスタ１が甲板上に露呈する位置までコンテナ２を上昇させる。
【００１５】
以上でスラスタ１を甲板上まで上昇させる作業が終了するので、チェーンブロック等の手段を用いて、コンテナ１を支持した後、該スラスタ１に対する補修、点検作業等が甲板上において実施される。そして、スラスタ１の補修、点検作業等が終了すると、以下のようなスラスタ１の降下手順が実行される。
【００１６】
６）図５(ａ）に示すように、吊金具５Ａ’に掛着されていたワイヤ１１Ａを吊金具５Ａに掛け替えるとともに、吊金具５Ｂおよび５Ｃに掛着されていたワイヤ１１Ｂおよび１１Ｃを吊金具５Ｂ’および５Ｃ’にそれぞれ掛け替える。
【００１７】
７）ワイヤ１１Ａ，１１Ｂおよび１１Ｃを等速で繰出して、図５（ｂ）に示すように、スラスタ１が船底の下方に位置されるまでコンテナ２を下降させる。
【００１８】
８）次に、ワイヤ１１Ｃを繰り出しながらワイヤ１１Ａを巻き上げ、その後、ワイヤ１１Ｂを繰出す。これにより、図５（ｃ）に示すように、コンテナ２が反時計方向に回転し、その際、ワイヤ１１Ｂが掛着された吊金具５Ｂの左方向位置変化のために、滑車９Ｂが左方向に移動する。
なお、図３に示すように、吊金具５Ｂはコンテナ２における回転方向側の面２ａとは逆の側の面２ｂに掛着されているので、コンテナ２の回転に伴って該コンテナ２の周面にワイヤ１１Ｂが巻回される虞はない。
【００１９】
９）図５（ｄ）に示すように、コンテナ２の下方にスラスタ１が位置されるまで該コンテナ２の回転操作を継続する。このとき、吊金具５Ｂ，５Ｃの位置が入れ替わるために滑車９Ｂ，９Ｃの位置も入れ替わることになる。
【００２０】
１０）ワイヤ１１Ａ，１１Ｂおよび１１Ｃを等速で巻き上げて、図５(ｅ)に示すように、スラスタ１が船底から突出する位置までコンテナ２を上昇させる。
【００２１】
以上の説明から明らかなように、上記実施形態に係る昇降装置によれば、海上クレーン等を使用することなくスラスタ１を甲板上まで速やかに移動することができるので、該スラスタ１の補修、点検作業等を低コストでかつ短時間に実施することができる。
また、コンテナ２を上下逆の状態で上昇させるので、支持フレーム８Ａ，８Ｂおよび８Ｃの甲板からの突出長を高くすることなくスラスタを甲板上に露呈させることができる。
【００２２】
なお、作業船の航行時には、走行抵抗を低減するためにスラスタ１を孔部７内に格納することが望ましいが、上記実施形態の昇降装置によれば、図４（ａ）の状態または図５（ｅ）の状態からワイヤ１１Ａ，１１Ｂおよび１１Ｃを等速で巻き上げることにより、スラスタ１を孔部７内に格納することができる。
【００２３】
上記実施形態に係る昇降装置では、図５（ｅ）において、ワイヤ１１Ａ，１１Ｂおよび１１Ｃの掛け替え操作を行っているが、図６ないし図８に示す昇降装置では、この掛け替え操作が不要である。この昇降装置は、図８に示すように、吊金具５Ａ’，５Ｂ’および５Ｃ’を吊金具５Ａ，５Ｂおよび５Ｃに対してコンテナ２の中央断面Ｌを中心とする対称位置に設けてある。そして、吊金具５Ａ，５Ａ’，５Ｂ，５Ｂ’，５Ｃおよび５Ｃ’にそれぞれワイヤ１１Ａ，１１Ａ’，１１Ｂ，１１Ｂ’および１１Ｃ，１１Ｃ’を掛着するとともに、該各ワイヤをそれぞれ滑車９Ａ，９Ａ’，９Ｂ，９Ｂ’，９Ｃおよび９Ｃ’を介して図示していない各別なウインチに接続してある。
【００２４】
滑車９Ａおよび９Ａ’は、それぞれ支持フレーム８Ａおよび８Ａ’に固定支持され、また滑車９Ｂ，９Ｂ’，９Ｃおよび９Ｃ’は、それぞれ支持フレーム８Ｂ，８Ｂ’，８Ｃおよび８Ｃ’に移動可能に支持されている。もちろん、支持フレーム８Ａ，８Ａ’，８Ｂ，８Ｂ’，８Ｃおよび８Ｃ’は、コンテナ２が回転する垂直面に平行するように水平配設されている。
【００２５】
この実施形態に係る昇降装置では、図４（ａ）〜（ｅ）および図４（ａ）〜（ｅ）に示した態様でコンテナ２が昇降および回転されるようにワイヤ１１Ａ，１１Ａ’，１１Ｂ，１１Ｂ’，１１Ｃおよび１１Ｃ’に接続されたウインチが巻き上げ作動および繰り出し作動される。
この昇降装置の場合、吊金具５Ａ，５Ａ’，５Ｂ，５Ｂ’，５Ｃおよび５Ｃ’に常時ウインチワイヤ１１Ａ，１１Ａ’，１１Ｂ，１１Ｂ’，１１Ｃおよび１１Ｃ’が接続されているので、ワイヤの掛け替え操作が不要である。
【００２６】
なお、上記上記各実施形態おいて用いられる各ウインチは、図示していないコントローラに内蔵された昇降プログラムに基ずいてその巻き上げ動作および繰出し動作が制御される。
【００２７】
【発明の効果】
請求項1、２に係るスラスタ昇降装置よれば、海上クレーン等を使用することなくスラスタを甲板上まで速やかに移動することができるので、該スラスタの補修、点検作業等を低コストでかつ短時間に実施することが可能になる。
そして、請求項２の発明に係るスラスタ昇降装置よれば、ウインチワイヤの架け替え操作が不要であるので、人手を要することなくスラスタを昇降させることができる。
【図面の簡単な説明】
【図１】本発明に係るスラスタ昇降装置の実施形態を示した概略正面図。
【図２】図１に示したスラスタ昇降装置の概略側面図。
【図３】図１に示すコンテナの平面図。
【図４】スラスタを稼働位置から甲板の上方まで上昇させる手順を示した概略図。
【図５】スラスタを甲板の上方から稼働位置まで下降させる手順を示した概略図。
【図６】本発明に係るスラスタ昇降装置の他の実施形態を示した概略正面図。
【図７】図６に示したスラスタ昇降装置の概略側面図。
【図８】図６に示すコンテナの平面図。
【符号の説明】
１スラスタ
２コンテナ
５Ａ，５Ａ’，５Ｂ，５Ｂ’，５Ｃ，５Ｃ’ 吊金具
６船体
７孔部
８Ａ，８Ａ’，８Ｂ，８Ｂ’，８Ｃ，８Ｃ’ 支持フレーム
９Ａ，９Ａ’，９Ｂ，９Ｂ’，９Ｃ，９Ｃ’ 滑車
１１Ａ，１１Ａ’，１１Ｂ，１１Ｂ’，１１Ｃ，１１Ｃ’ ワイヤ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for raising and lowering a thruster for positioning a work ship at a fixed point.
[0002]
[Prior art]
A work ship that performs work such as boring needs to always place the hull at a fixed point without being swept away by wind or tide. Therefore, in this type of work ship, a plurality of thrusters (propulsion devices) are projected from the bottom of the ship, and the hull is positioned at a predetermined work position by the propulsive force generated by the rotation of the propellers.
[0003]
This thruster needs to be periodically repaired and inspected. Thus, conventionally, a diver removes a thruster to be repaired and inspected from the support, and transports the thruster to the ship with a marine crane. The thruster that has been repaired and inspected is transported to the original position using a marine crane, and then attached to the support again by the diver.
[0004]
[Problems to be solved by the invention]
The above-described thruster installation / removal operation and moving operation require labor and a great deal of cost and time. Although it is conceivable to move the work ship to the dry dock and repair, check or replace the thruster there, this case also requires a great deal of cost and time.
The subject of this invention is providing the thruster raising / lowering apparatus which can move a thruster on board without using large sized raising / lowering moving machines, such as a marine crane, in view of such a condition.
[0005]
[Means for Solving the Problems]
A first invention includes an elevating body that supports a thruster in a manner protruding from the lower surface, and a hole provided through the hull in order to move the elevating body up and down. after rotated within 180 degrees vertical plane in the lower, the thrusters raises the lifting body to be positioned on the deck, the rear lowering of lift, the lifting body 180 degrees vertical plane in the ship's bottom of the lower And a first lifting bracket and a second lifting bracket respectively provided at corresponding positions of the upper part and the lower part of one side surface of the lifting body parallel to the vertical plane. The third and fourth hanging brackets respectively provided at corresponding positions of the upper and lower portions of one side surface of the lifting body orthogonal to the vertical plane, and the lifting body parallel to the vertical plane On the other side of the A fifth hanging bracket and a sixth hanging bracket respectively provided at corresponding positions of the lower portion, and fixedly disposed above the hole portion, and are directed toward the first hanging bracket and the second hanging bracket. A first pulley that hangs down the wire, and a second wire that is disposed so as to be horizontally movable along the vertical surface above the hole, and toward the third and fourth hanging brackets. A second pulley that hangs down, and is arranged to be horizontally movable along the vertical surface above the hole, and suspends a third wire toward the fifth and sixth hanging brackets. A first pulley, and a first winch, a second winch, and a third winch connected to the first wire, the second wire, and the third wire, respectively. 3 and 5 are the inside of a triangle formed by connecting them. The arrangement positions are set so that the vertical axis passing through the center of gravity of the lifting body is positioned, and the second hanging bracket, the third hanging bracket of the lifting body in a state where the thruster is positioned below, The first hanging bracket, the second hanging wire, and the third wire are connected to a fifth hanging bracket, respectively, and the thruster is positioned upward. The hanging first metal wire, the second wire, and the third wire are connected to the fourth hanging metal fitting and the sixth hanging metal fitting, respectively .
A second invention includes an elevating body that supports a thruster in a manner protruding from the lower surface, and a hole provided through the hull vertically to move the elevating body up and down. after rotated within 180 degrees vertical plane in the lower, the thrusters raises the lifting body to be positioned on the deck, the rear lowering of lift, the lifting body 180 degrees vertical plane in the ship's bottom of the lower A thruster lifting and lowering device that is rotated by a first suspension fitting provided on an upper portion of one side surface of the lifting body parallel to the vertical surface, and the other of the lifting body parallel to the vertical surface. In a lower part of the side surface, a second hanging bracket provided at a point-symmetrical position with respect to the first hanging bracket with respect to a central section of the lifting body parallel to the vertical plane, and the perpendicular to the vertical plane Provided on the upper part of one side of the lifting body And 3 of the hanging bracket,
A lower part of one side surface of the elevating body perpendicular to the vertical plane, a fourth hanger provided at a point-symmetrical position with the third hanger, with respect to the central section of the elevating body, A central section of the lifting body at a lower part of the other side surface of the lifting body parallel to the vertical surface and a fifth hanging bracket provided on the upper portion of one side surface of the lifting body parallel to the vertical surface A sixth hanging bracket provided at a point-symmetrical position with respect to the fifth hanging bracket, and a fixed wire disposed above the hole, and the first wire toward the first hanging bracket. A first pulley that hangs down, a second pulley that is fixedly disposed above the hole and hangs a second wire toward the second hanging bracket, and the vertical surface above the hole. And a third wire that hangs down the third wire toward the third hanging bracket. A vehicle, a fourth pulley that is disposed so as to be horizontally movable along the vertical surface above the hole, and hangs a fourth wire toward the fourth hanging bracket; and above the hole A fifth pulley that is horizontally movable along the vertical surface and hangs a fifth wire toward the fifth hanging bracket, and is horizontally disposed along the vertical surface above the hole. A sixth pulley that is movably disposed and hangs a sixth wire toward the sixth hanging bracket, the first wire, the second wire, the third wire, the fourth wire, First, second, third, fourth, fifth and sixth winches respectively connected to the fifth wire and the sixth wire, the first hanging bracket and the fourth hanging bracket and sixth hanging bracket, the lift center of gravity position within the triangle formed by connecting them And the second hanging bracket, the third hanging bracket, and the fifth hanging bracket are located at the center of gravity of the lifting body in a triangle formed by connecting them. The respective arrangement positions are set so that the vertical axis passing through the position is located, and the first hanging bracket, the second hanging bracket, the third hanging bracket, the fourth hanging bracket, and the fifth hanging bracket are arranged. The first wire, the second wire, the third wire, the fourth wire, the fifth wire, and the sixth wire are connected to the metal fitting and the sixth hanging metal fitting, respectively .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 are a front view and a side view, respectively, schematically showing a thruster lifting device according to the present invention.
In FIG. 1, a thruster 1 as a propelling device is attached to the lower surface of a hollow cubic container 2 having a watertight structure.
[0007]
The container 2 incorporates a motor 3 for rotationally driving the propeller 1a of the thruster 1 and is provided with hanging brackets 5A, 5B and 5C on the upper outer side thereof, and the hanging brackets 5A'5B 'at corresponding positions on the lower outer side. And 5C ′.
As shown in FIG. 3, the hanging metal fittings 5A (5A ′), 5B (5B ′) and 5C (5C ′) are provided at the center of the front side of the container 2, the rear side of the left side and the right end of the rear side, respectively. It has been. If each hanging bracket 5A (5A ′), 5B (5B ′) and 5C (5C ′) is provided at such a position, the vertical axis passing through the two gravity center positions G of the container in the triangle connecting these positions is Will be located.
[0008]
A hole 7 for moving the container 2 up and down penetrates the hull 6 of the work ship. Further, as shown in FIG. 2, horizontally extending support frames 8A, 8B and 8C are arranged above the hole 7 in parallel.
A pulley 9A is fixed to the support frame 8A, and pulleys 9B and 9C are movably attached to the support frames 8B and 8C, respectively. The support frames 8B and 8C also have a function as guide rails for guiding the pulleys 9B and 9C, respectively.
[0009]
On the deck, winches 10A, 18B, and 10C are arranged, and wires 11A, 11B, and 11C fed from these are suspended in the hole 7 through the pulleys 9A, 9B, and 9C, respectively.
The wires 11A, 11B, and 11C suspended in the hole 7 are hung at the lower ends of the wires 11A, 11B, and 11C on the hanging metal fittings 5A ′, 5B, and 5C of the container 2, respectively.
[0010]
Hereinafter, with reference to FIG. 4 and FIG. 5, the raising / lowering procedure of the thruster 1 in the case of inspecting and maintaining the thruster 1 will be described.
1) When the thruster 1 is in operation, as shown in FIG. 4A, the container 2 is positioned at the descending end, that is, the thruster 1 protrudes from the ship bottom.
[0011]
2) When checking and servicing the thruster 1, first, as shown in FIG. 4B, the winch wires 11A, 11B and 11C are fed out at a constant speed, and the container 2 is lowered below the bottom of the ship.
[0012]
3) Next, the wire 11A is wound up while the wire 11C is fed out, and then the wire 11B is fed out. Thereby, as shown in FIG.4 (c), the container 2 rotates clockwise in a vertical surface. Since the support frame 8B is provided along the vertical plane, the pulley 9B is guided by the support frame 8B in the right direction due to the change in the right position of the hanging bracket 5B accompanying the rotation of the container 2. Move to.
In addition, the hanging metal fitting 5B is hooked on the surface 2b on the opposite side to the surface 2a of the rotation direction side in the container 2 (refer FIG. 3). Therefore, there is no possibility that the wire 11B is wound around the peripheral surface of the container 2 as the container 2 rotates.
Further, since the support frames 8A, 8B, and 8C are arranged so as to be shifted in a direction orthogonal to the vertical plane, the wires 11A, 11B, and 11C and the pulleys 9A, 9B, and 9C are connected to each other as the container 2 rotates. There is no risk of interference.
[0013]
4) The rotation operation of the container 2 is continued, and the container 2 is turned upside down as shown in FIG. At this time, since the positions of the hanging brackets 5B and 5C are interchanged, the positions of the pulleys 9B and 9C are also interchanged.
[0014]
5) The wires 11A, 11B and 11C are wound up at a constant speed, and the container 2 is raised to a position where the thruster 1 is exposed on the deck as shown in FIG. 4 (e).
[0015]
Since the operation of raising the thruster 1 to the deck is completed as described above, after the container 1 is supported using means such as a chain block, repair and inspection work for the thruster 1 are performed on the deck. When the repair of the thruster 1 and the inspection work are completed, the following procedure for lowering the thruster 1 is executed.
[0016]
6) As shown in FIG. 5 (a), the wire 11A hung on the hanging fitting 5A 'is replaced with the hanging fitting 5A, and the wires 11B and 11C hung on the hanging fittings 5B and 5C are hung. The brackets 5B 'and 5C' are respectively replaced.
[0017]
7) The wires 11A, 11B, and 11C are fed at a constant speed, and the container 2 is lowered until the thruster 1 is positioned below the ship bottom, as shown in FIG. 5 (b).
[0018]
8) Next, the wire 11A is wound up while the wire 11C is fed out, and then the wire 11B is fed out. As a result, as shown in FIG. 5 (c), the container 2 rotates counterclockwise. At this time, the pulley 9B moves leftward due to a change in the leftward position of the hanging bracket 5B to which the wire 11B is hooked. Move to.
As shown in FIG. 3, the hanging metal fitting 5B is hooked on the surface 2b on the opposite side of the surface 2a in the rotational direction of the container 2, so that the circumference of the container 2 is increased as the container 2 rotates. There is no possibility that the wire 11B is wound around the surface.
[0019]
9) As shown in FIG. 5D, the rotation operation of the container 2 is continued until the thruster 1 is positioned below the container 2. At this time, since the positions of the hanging brackets 5B and 5C are interchanged, the positions of the pulleys 9B and 9C are also interchanged.
[0020]
10) The wires 11A, 11B and 11C are wound up at a constant speed, and the container 2 is raised to a position where the thruster 1 protrudes from the bottom of the ship as shown in FIG. 5 (e).
[0021]
As is clear from the above description, according to the lifting device according to the above embodiment, the thruster 1 can be quickly moved to the deck without using a marine crane or the like. Work etc. can be carried out at a low cost and in a short time.
Further, since the container 2 is raised upside down, the thruster can be exposed on the deck without increasing the protruding length of the support frames 8A, 8B and 8C from the deck.
[0022]
It is desirable to store the thruster 1 in the hole 7 in order to reduce running resistance during navigation of the work ship. However, according to the lifting device of the above embodiment, the state shown in FIG. The thruster 1 can be stored in the hole 7 by winding the wires 11A, 11B, and 11C from the state (e) at a constant speed.
[0023]
In the lifting device according to the above embodiment, the wire 11A, 11B, and 11C are exchanged in FIG. 5 (e). However, in the lifting device shown in FIGS. In this lifting device, as shown in FIG. 8, the hanging metal fittings 5A ′, 5B ′ and 5C ′ are provided at symmetrical positions with respect to the hanging metal fittings 5A, 5B and 5C around the central section L of the container 2. The hanging bracket 5A, 5A ', 5B, 5B ', ' respectively wires 11A to, 11A' 5C and 5C, 11B, 11B 'and 11C, 11C' while hooking and pulleys the respective wires respectively 9 A, 9 A ', 9 B, 9 B', 9 C and 9 C 'are connected to each other winch (not shown).
[0024]
Pulleys 9 A and 9 A 'are each support frame 8A and 8A' are fixedly supported, also pulley 9 B, 9 B ', 9 C and 9 C' are each support frame 8B, 8B ', 8C and 8C' Is supported so as to be movable. Of course, the support frames 8 A, 8 A ′, 8 B, 8 B ′, 8 C and 8 C ′ are horizontally disposed so as to be parallel to the vertical plane on which the container 2 rotates.
[0025]
In the lifting device according to this embodiment, the wires 11A, 11A ′, and 11B are arranged so that the container 2 is lifted and lowered in the manner shown in FIGS. 4 (a) to (e) and FIGS. 4 (a) to (e). , 11B ′, 11C and 11C ′ are operated to wind up and unwind.
In the case of this lifting device, the winch wires 11A, 11A ', 11B, 11B', 11C, and 11C 'are always connected to the hanging brackets 5A, 5A', 5B, 5B ', 5C, and 5C'. No operation is required.
[0026]
Each winch used in each of the above embodiments is controlled in its winding operation and feeding operation based on a lifting program built in a controller (not shown).
[0027]
【The invention's effect】
According to the thruster lifting device according to claims 1 and 2, the thruster can be quickly moved to the deck without using a marine crane or the like, so that the thruster can be repaired and inspected at low cost and in a short time. Can be implemented.
According to the thruster lifting apparatus according to the second aspect of the present invention, the winch wire replacement operation is not required, so that the thruster can be lifted and lowered without the need for manpower.
[Brief description of the drawings]
FIG. 1 is a schematic front view showing an embodiment of a thruster lifting device according to the present invention.
FIG. 2 is a schematic side view of the thruster lifting device shown in FIG.
3 is a plan view of the container shown in FIG. 1. FIG.
FIG. 4 is a schematic view showing a procedure for raising a thruster from an operating position to above a deck.
FIG. 5 is a schematic diagram showing a procedure for lowering a thruster from above the deck to an operating position.
FIG. 6 is a schematic front view showing another embodiment of the thruster lifting device according to the present invention.
7 is a schematic side view of the thruster lifting device shown in FIG. 6;
8 is a plan view of the container shown in FIG.
[Explanation of symbols]
1 Thruster 2 Container 5A, 5A ', 5B, 5B', 5C, 5C 'Hanging metal fitting 6 Hull 7 Hole 8A, 8A', 8B, 8B ', 8C, 8C' Support frame 9A, 9A ', 9B, 9B' , 9C, 9C 'pulleys 11A, 11A', 11B, 11B ', 11C, 11C' wires

Claims

An elevating body (2) supporting the thruster (1) in a manner protruding from the lower surface, and a hole (7) provided through the hull (6) vertically to move the elevating body (2) up and down. the provided, after rotating by the lift member (2) 180 degrees vertical plane in the ship's bottom downward, raising the elevating member (2) until said thruster (1) is positioned on the deck, the lifting A thruster lifting device for rotating the lifting body (2) within a vertical plane 180 degrees below the ship bottom after the body (2) is lowered,
A first hanging bracket (5A) and a second hanging bracket (5A ′ ) respectively provided at corresponding positions of the upper part and the lower part of one side surface of the elevating body (2) parallel to the vertical plane ;
A third hanging bracket (5B) and a fourth hanging bracket (5B ′ ) respectively provided at corresponding positions of the upper part and the lower part of one side surface of the lifting body (2) orthogonal to the vertical plane ;
A fifth hanging bracket (5C) and a sixth hanging bracket (5C ′ ) provided at corresponding positions on the upper side and lower side of the other side surface of the lifting body (2) parallel to the vertical plane ,
A first pulley ( fixed and disposed above the hole (7) and suspends the first wire (11A) toward the first hanging bracket (5A) and the second hanging bracket (5A ′ ) ( 9A)
Above the hole (7), the second wire ( 5B) is disposed so as to be horizontally movable along the vertical plane, and is directed toward the third hanging bracket (5B) and the fourth hanging bracket (5B ′ ). A second pulley (9B) depending on 11B);
Above the hole (7), it is disposed so as to be horizontally movable along the vertical plane, and a third wire ( 5C ) is directed toward the fifth hanging bracket (5C) and the sixth hanging bracket (5C ′ ). A third pulley (9C) depending on 11C);
First, second and third winches respectively connected to the first wire (11A), the second wire (11B) and the third wire (11C);
The first hanging bracket (5A), the third hanging bracket (5B), and the fifth hanging bracket (5C) are located in the center of gravity of the elevating body (2) in a triangle formed by connecting them. Each placement position is set so that the vertical axis passing through
The second hanging bracket (5A ′ ), the third hanging bracket (5B), and the fifth hanging bracket (5C) of the elevating body (2) in a state where the thruster (1) is positioned below are suspended on the hanging lever. Connecting the first wire (11A), the second wire (11B) and the third wire (11C),
In the first hanging bracket (5A), the fourth hanging bracket (5B ' ) and the sixth hanging bracket (5C ' ) of the lifting body (2) in a state where the thruster (1) is positioned above, A thruster lifting device characterized in that the first wire (11A), the second wire (11B), and the third wire (11C) that are suspended are connected to each other .

An elevating body (2) supporting the thruster (1) in a manner protruding from the lower surface, and a hole (7) provided through the hull (6) vertically to move the elevating body (2) up and down. the provided, after rotating by the lift member (2) 180 degrees vertical plane in the ship's bottom downward, raising the elevating member (2) until said thruster (1) is positioned on the deck, the lifting A thruster lifting device for rotating the lifting body (2) within a vertical plane 180 degrees below the ship bottom after the body (2) is lowered,
A first hanging bracket (5A) provided on an upper portion of one side surface of the elevating body (2) parallel to the vertical plane;
In the lower part of the other side surface of the lifting body (2) parallel to the vertical surface, the first hanging bracket (5A) and the point with respect to the central cross section of the lifting body (2) parallel to the vertical surface A second hanging bracket (5A ′ ) provided at a symmetrical position ;
A third hanging bracket (5B) provided on an upper portion of one side surface of the lifting body (2) orthogonal to the vertical plane;
A lower portion of one side surface of the elevating body (2) orthogonal to the vertical plane is provided at a position symmetrical to the third hanging bracket (5B) with respect to the central cross section of the elevating body (2). A fourth hanging bracket (5B ' ),
A fifth hanging bracket (5C) provided at an upper portion of one side surface of the elevating body (2) parallel to the vertical plane;
At the lower part of the other side surface of the elevating body (2) parallel to the vertical surface, the elevating body (2) is provided at a point symmetrical with the fifth hanging bracket (5C) with respect to the central section of the elevating body (2). A sixth hanging bracket (5C ' ),
A first pulley (9A ′ ) fixedly disposed above the hole (7) and hanging down the first wire (11A ′ ) toward the first hanging bracket (5A) ;
A second pulley (9A) fixedly disposed above the hole (7) and hanging down the second wire (11A) toward the second hanging bracket (5A ' );
A third pulley (disposed above the hole (7)) that is horizontally movable along the vertical surface and hangs down a third wire (11B) toward the third suspension bracket (5B). 9B)
A fourth wire is disposed above the hole (7) so as to be horizontally movable along the vertical surface, and hangs down the fourth wire (11B ′ ) toward the fourth hanging bracket (5B ′ ) . Pulley (9B ' ),
A fifth pulley (disposed above the hole (7)) that is horizontally movable along the vertical surface and hangs a fifth wire (11C) toward the fifth suspension bracket (5C). 9C)
A sixth wire (11C ' ) is suspended above the hole (7) so as to be horizontally movable along the vertical surface and hangs down the sixth wire (11C ' ) toward the sixth hanging bracket (5C ' ) . Pulley (9C ' ),
The first wire (11A ′ ), the second wire (11A), the third wire (11B), the fourth wire (11B ′ ), the fifth wire (11C) and the sixth wire (11C ′) 1), 2nd, 3rd, 4th, 5th and 6th winches respectively connected to
The first hanging bracket (5A), the fourth hanging bracket (5B ' ) and the sixth hanging bracket (5C ' ) are formed by connecting the lifting / lowering body (2) in a triangle formed by connecting them. The second hanging bracket (5A ' ), the third hanging bracket (5B), and the fifth hanging bracket (5C) are connected by connecting them so that the vertical axis passing through the center of gravity position is located . The respective arrangement positions are set so that the vertical axis passing through the center of gravity of the elevating body (2) is positioned in the triangle formed,
The first hanging bracket (5A), the second hanging bracket (5A ' ), the third hanging bracket (5B), the fourth hanging bracket (5B ' ), the fifth hanging bracket (5C) and the sixth The first wire (11A ' ), the second wire (11A), the third wire (11B), the fourth wire (11B ' ), and the fifth wire suspended from the hanging bracket (5C ' ) (11C) and the sixth wire (11C ′ ) are connected to each other, and a thruster lifting device characterized by being connected.