JPS6313889A - Ice breaker - Google Patents

Abstract

PURPOSE:To efficiently carry out ice breaking at shoulder parts by providing ice cutting bodies on the shoulder parts of both broadsides near draft lines. CONSTITUTION:Ice cutting bodies 2 are provided on the shoulder parts of both broadcasts near the draft lines of a hull 1. The ice cutting body 2 consists of a body 20 having a triangular side and a fusiform plane and a support lever 21 projecting out of the broadside. The body 20 is provided in parallel to the broadside with its triangular oblique side 22 being opposite to the front sea surface, while having a lower sharp edge part. Thereby, an ice board 52 can be efficiently broken with the oblique sides 22 having the sharp edge parts. It is also possible to provide rotating fins, etc. Thus, by providing an ice cutting body on the broadside shoulder part as a parallel part, the ice breaking operation by means of the shoulder part which was conventionally unable to carry out ice breaking operation, can be efficiently carried out.

Description

【発明の詳細な説明】 （産業上の利用分野） この発明は砕氷船に関し、砕氷を効率よく行ない、しか
も船体や船の走行に悪影響を及ぼさない構造を提供する
ことを目的とする。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an icebreaker, and an object thereof is to provide a structure that efficiently breaks ice and does not adversely affect the hull or the running of the ship.

（従来の技術） 第１０図乃至第１２図は従来の砕氷船５０による砕氷状
態を示す。この従来の砕氷船５０では、砕氷時には第１
０図の点線５１で示されるように氷板５２が割れていた
。この場合、船首部付近では第１１図のＥ−ＥＩＩ断面
／に示されているように船側が傾斜しているので船体は
氷板に乗り上げて自重で効率よく氷板を割ることが出来
るが、第１２図のＦ−Ｆ断面に示すように５ｈｏｕｌｄ
ｅｒ部では船側がほぼ垂直になっているので氷板に乗り
上げることができず、逆に氷板にはさみつけられて高い
水荷重が船体に加わるだけで氷板を効率よく割ることが
出来ない欠点があった。この為従来より５ｈｏｕｌｄｅ
ｒ部で効率よく砕氷し得る砕氷船が要求されていた。(Prior Art) FIGS. 10 to 12 show ice breaking conditions by a conventional icebreaker 50. In this conventional icebreaker 50, when breaking ice, the first
The ice plate 52 was broken as indicated by the dotted line 51 in Figure 0. In this case, near the bow, the ship's side is tilted as shown in E-EII cross section / in Figure 11, so the hull can run onto the ice plate and break the ice plate efficiently with its own weight. 5hold as shown in the F-F cross section in Figure 12.
In the er section, the side of the ship is almost vertical, so it is not possible to run aground on the ice sheet, and conversely, it is stuck on the ice sheet and a high water load is applied to the hull, making it impossible to break the ice sheet efficiently. was there. For this reason, it is 5hold more than before.
There was a need for an icebreaker capable of efficiently breaking ice in the r section.

（発明の′ｌｌ＆要） 本発明は上記した従来の砕氷船の欠点を改善するために
なされたもので船体の喫水線近傍に砕氷具を設けたこと
を基本的な特徴とするものである。(Summary of the Invention) The present invention was made to improve the above-mentioned drawbacks of the conventional icebreaker, and its basic feature is that an icebreaker is provided near the waterline of the hull.

この構成により船首部だけでなく　、５ｈｏｕｌｄｅｒ
部においても氷板を効率よく割ることが可能になる。With this configuration, not only the bow but also the 5holder
This makes it possible to efficiently break ice sheets even in the middle of the day.

（実施例） 以下本発明をその実施例に基づいて説明する。(Example) The present invention will be explained below based on examples thereof.

第１図乃至第４図は船体１に砕氷具として切氷体２を装
着した実施例を示すものである。1 to 4 show an embodiment in which an ice-cutting body 2 is attached to a ship's hull 1 as an ice-breaking device.

初氷体２は船体１の両舷側の５ｈｏｕｌｄｅｒ部の喫水
旋近傍に装着さ机ており、側面３角形状、平面紡錘形状
の初氷体本体２０と、これを舷側から張出して支持する
レバー２１とからｍ或されている。The first ice body 2 is installed near the draft slewing of the 5holder portion on both sides of the hull 1, and consists of a first ice body body 20 having a triangular side surface and a planar spindle shape, and a lever 21 that extends from the side and supports the first ice body 20. It has been m.

本体２０は舷側と平行にかっ、３角形の斜辺２２が前方
海面に対向するように設けられている。この斜辺２２の
傾斜は船首材の傾斜とほぼ同じになっている。そして本
体２０は第３図、第４図に示すように下方に向って尖っ
ており、この先端で氷板５２を切るようになっている。The main body 20 is provided parallel to the ship's side, with a triangular hypotenuse 22 facing the sea surface in front of it. The slope of this oblique side 22 is approximately the same as the slope of the bow member. The main body 20 is pointed downward as shown in FIGS. 3 and 4, and is adapted to cut the ice plate 52 with this tip.

このように初氷体２の前方に切れ上がり先が尖った刃、
即ち、斜辺２２によって効率よく船体の外側の氷板５２
を割ることが出来るので５ｈＯ１ｌｌｄｅｒ部分には未
破砕氷板は当らない。そのため、５ｈｏｕｌｄｅｒ部に
は水荷重は加わらず、それによる砕氷抵抗の増大も防ぐ
ことが出来る。In this way, there is a blade with a sharp point in front of the first ice body 2,
In other words, the hypotenuse 22 efficiently blocks the ice plate 52 on the outside of the hull.
Since the ice can be broken, the uncrushed ice plate will not hit the 5hOllder part. Therefore, no water load is applied to the 5holder portion, and an increase in ice crushing resistance due to this can be prevented.

次に回動フィン３を備えた実施例を第５図乃至第９図に
示す。Next, an embodiment provided with a rotating fin 3 is shown in FIGS. 5 to 9.

この回動フィン３も同様に船体１の両舷側の５ｈｏｕｌ
ｄｅｒ部の喫水線近傍に設けられている。The rotating fins 3 also have 5 holes on both sides of the hull 1.
It is provided near the waterline of the der section.

回動フィン３のフィン本体３０は平面は変形の扇形状、
側面は紡錘形状をしており、上下方向に回動するように
なっている。このフィン本体３０は砕氷時には第６図に
示すように水平から２０”〜３０°程度（船首角と同程
度）に傾斜させ、このフィン本体３ｏで氷板に乗り上げ
て氷板を押し下げて割る。これにより氷板を船体の自重
で割ることが出来るので効率よく行なうことが出来る。The fin main body 30 of the rotating fin 3 has a deformed fan shape when viewed from above.
The sides are spindle-shaped and can be rotated up and down. When breaking ice, the fin main body 30 is tilted at about 20'' to 30° from the horizontal (about the same as the bow angle) as shown in FIG. 6, and the fin main body 3o rides on the ice plate and pushes down the ice plate to break it. This allows the ice sheet to be broken by the ship's own weight, making it more efficient.

平木航行時にはフィン本体３０を傾斜させておくと水の
抵抗増加になるので第７図のように水平にする。このよ
うにすれば水の抵抗増加も避られると共に、このフィン
によって船体のピッチングの防止にも効果がある。If the fin main body 30 is tilted when navigating on a flat tree, water resistance will increase, so it should be horizontal as shown in FIG. 7. In this way, an increase in water resistance can be avoided, and the fins are also effective in preventing pitching of the hull.

フィン本体３００回ｖＪｄ橋としては種々のものが採用
可能であるが、この実施例では第８図、第９図を用いて
いる。即ち、フィン本体３０には回転軸３１がついてお
り、この回転軸にはロッド３２が固定されている。また
ロッド３２には油圧シリンダ３３が取りつけられており
、油圧シリンダ３３は油圧パイプ３４．３５で油圧ポン
プ３６とつながっている。従って油圧ポンプ３６を作動
させることによりバイブ３４，３５から油が油圧シリン
ダ３３に送られ、シリンダ内のピストンが動いてロッド
３２を肋かし回転軸３１を回転させる。これによってフ
ィン本体３０が所定の角度に設定される構造となってい
る。Various types of 300-time vJd bridges can be used for the fin body, but in this embodiment, the ones shown in FIGS. 8 and 9 are used. That is, the fin body 30 has a rotating shaft 31 attached thereto, and a rod 32 is fixed to this rotating shaft. A hydraulic cylinder 33 is also attached to the rod 32, and the hydraulic cylinder 33 is connected to a hydraulic pump 36 through hydraulic pipes 34, 35. Therefore, by operating the hydraulic pump 36, oil is sent from the vibrators 34, 35 to the hydraulic cylinder 33, and the piston within the cylinder moves to push the rod 32 and rotate the rotating shaft 31. This provides a structure in which the fin main body 30 is set at a predetermined angle.

（発明の効果） 以上説明したように本発明の砕氷船によれば船体の喫水
線近傍に砕氷具を備えているため、５ｈｏｕｌｄｅｒ部
おいても効率良く砕氷することが可能となる。(Effects of the Invention) As explained above, since the icebreaker of the present invention is equipped with an icebreaker near the waterline of the hull, it is possible to efficiently break ice even in the 5-houlder section.

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

第１図は本発明の砕氷船の一実施例を示す平面図、第２
図はその正面図、第３図は第１図におけるＡ−Ａ線断面
図、第４図は第２図における８−Ｂ線断面図、第５図は
本発明の砕氷船の他の実施例を示す平面図、第６図と第
７図はその側面図、第８図は第５図おけるＣ−Ｃ線断面
図、第９図は第８図のＤ−Ｄ線失視図である。 第１０図ないし第１２図は従来の砕氷船による砕氷状態
を示すもので、第１０図は平面図、第１１図は第１０図
中Ｅ−Ｅ線に沿う断面図、第１ｚ図は第１０図中Ｆ−Ｆ
線に沿う断面図である。 １・・・船体、２・・・初氷体、３・・・回動フィン。 第３図　　　　　　　第４図 第５図 第１０図 Ｉ：１１ 第１１図　　　　　　第１２図Fig. 1 is a plan view showing an embodiment of the icebreaker of the present invention;
3 is a sectional view taken along line AA in FIG. 1, FIG. 4 is a sectional view taken along line 8-B in FIG. 2, and FIG. 5 is another embodiment of the icebreaker of the present invention. 6 and 7 are side views thereof, FIG. 8 is a sectional view taken along the line CC in FIG. 5, and FIG. 9 is a blind view taken along the line D-D in FIG. 8. Figures 10 to 12 show ice breaking conditions by a conventional icebreaker. Figure 10 is a plan view, Figure 11 is a sectional view taken along the line E-E in Figure 10, and Figure 1z is a cross-sectional view of the icebreaker. F-F in the diagram
It is a sectional view along a line. 1... Hull, 2... First ice body, 3... Rotating fin. Figure 3 Figure 4 Figure 5 Figure 10 Figure I:11 Figure 11 Figure 12

Claims (1)

【特許請求の範囲】 １、船体の喫水線近傍に砕氷具を設けたことを特徴とす
る砕氷船。 ２、砕氷具が切氷体である特許請求の範囲第１項に記載
の砕氷船。 ３、砕氷具が回動フィンである特許請求の範囲第１項に
記載の砕氷船。[Claims] 1. An icebreaker characterized by having an icebreaker installed near the waterline of the hull. 2. The icebreaker according to claim 1, wherein the icebreaker is an ice-cutting body. 3. The icebreaker according to claim 1, wherein the icebreaker is a rotating fin.