JPS5920512B2 - Vessel with bow valve - Google Patents
Vessel with bow valveInfo
- Publication number
- JPS5920512B2 JPS5920512B2 JP55101024A JP10102480A JPS5920512B2 JP S5920512 B2 JPS5920512 B2 JP S5920512B2 JP 55101024 A JP55101024 A JP 55101024A JP 10102480 A JP10102480 A JP 10102480A JP S5920512 B2 JPS5920512 B2 JP S5920512B2
- Authority
- JP
- Japan
- Prior art keywords
- bow
- thin member
- ship
- upper shaft
- bow valve
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
- B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
- B63B1/06—Shape of fore part
- B63B1/063—Bulbous bows
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/46—Stems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Mechanically-Actuated Valves (AREA)
Description
【発明の詳細な説明】
本発明は、船首バルブ付き船舶のうちで、船首部分にお
いて夫々前方に突出する上部軸先と下部バルバスバウを
有する船首バルブ付船舶に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ship with a bow valve, which has an upper axle tip and a lower bulbous bow that respectively protrude forward in the bow portion, among ships with a bow valve.
一般に、船首下方部分に球状のバルブを設ける船首（球
状船首）を採用することによって、剰余抵抗の一種であ
る造波抵抗を減少させ得ることはよく知られている。Generally, it is well known that wave-making resistance, which is a type of residual resistance, can be reduced by adopting a bow having a spherical valve in the lower part of the bow (spherical bow).
ところで、かかる球状船首の、それが発明された初期の
頃の形状は、例えば「船型学抵抗編」（１１１懸昌夫著
、昭和２８年１月１０日天然社発行、Ｐ６２〜６３）か
らもわかるように、ただ単に船首部下方を球状に脹らま
せただけのものであったが、その後の理論的、実験的研
究の積重ねによって、冒頭に記載したように、下部バル
バスバウ（球状部）を上部軸先と同様船体前方に突出さ
せた方が、より一層優れた造波抵抗派効果を得られる、
ということが明らかにされ、現在では、殆ど全ての船首
バルブ付船舶は、このように下部バルバスバウが船体前
方へ突出した形状のものとされている。By the way, the shape of such a spherical bow in the early days when it was invented can be seen from, for example, ``Ship Formology and Resistance Edition'' (111, written by Masao Kake, published by Tennensha on January 10, 1952, pages 62-63). The lower part of the bow was simply expanded into a spherical shape, but subsequent theoretical and experimental research revealed that the lower bulbous bow (spherical part) was expanded to the upper part as described at the beginning. Similar to the tip of the shaft, if you make it protrude toward the front of the hull, you can get an even better wave-making resistance effect.
This has been made clear, and now almost all ships with bow bulbs have a shape in which the lower bulbous bow protrudes toward the front of the hull.
なお、このことは、球状船首によって船首波の相対位置
が前方に移動し、恰も船体長さが延長したかのような効
果、即ち、フルード数が減少したかのような効果が発揮
される、というのが造波抵抗減少をもたらす一因である
ことを考えれば容易に理解されるところである。Furthermore, this means that the relative position of the bow wave moves forward due to the bulbous bow, producing an effect as if the length of the hull had been extended, that is, as if the Froude number had been reduced. This is easily understood if we consider that this is one of the reasons for the decrease in wave resistance.
そして、このような突出型バルバスバウを有しない船舶
や非突出型バルバスバウを有する船舶に比べて、極めて
優れた抵抗特性を発揮することがよく知られている。It is well known that these vessels exhibit extremely superior resistance characteristics compared to ships that do not have such protruding bulbous bows or vessels that have non-protruding bulbous bows.
バルバスバウ採用による船体抵抗低減量は、一般に、剰
余抵抗で約２５％、全抵抗で約１５％に達すると言われ
ておシ、最近の船舶設計においては、このバルバスバウ
を可能な限シ採用せんとする傾向にある。It is generally said that the amount of hull resistance reduction achieved by adopting a bulbous bow is about 25% in residual resistance and about 15% in total resistance. There is a tendency to
ところが、従来のこの種の船舶においては、上記したよ
うな優れた効果を奏する反面、必然的にその船首プロフ
ィル（船首部分側面視）の最先端ラインが船体内方側に
大きく湾曲する形状とならざるを得す、船首プロフィル
において前記上部軸先と下部バルバスバウの間に凹状間
隙が形成されることになっていた為に、下記の如き種々
の不都合が生じていた。However, while conventional vessels of this type have the excellent effects described above, they inevitably have a shape in which the cutting edge line of the bow profile (as viewed from the side of the bow) is greatly curved inward. Unavoidably, a concave gap was formed between the upper shaft tip and the lower bulbous bow in the bow profile, resulting in various inconveniences as described below.
例えば、停船状態又は移動状態において、アンカー、漁
網、延縄、或は、オイルフェンス等の海上或は海中にあ
る物体を、船首部甲板上のウィンチ、フェアリーダ、ネ
ットホーラー、ラインホーラー等の引揚設備を利用して
船上へ引揚げる際に、風や潮流等の影響によって船体と
引揚物体との相対位置関係が種々変化する為に、例えば
、第１図のよ、うに、物体ａが引揚設備すの位置する舷
側とは反対の舷側に位置してしまう状態が往往にして生
じる。For example, when the ship is stationary or in motion, objects on the sea or in the sea, such as anchors, fishing nets, long lines, or oil fences, can be removed using hoisting equipment such as winches, fairleads, net haulers, line haulers, etc. on the bow deck. When hoisting a salvaged object onto a ship using A situation often arises where the ship is located on the opposite side of the ship from the side where the ship is located.
このような状態では、物体と引揚設備との間に船首部分
が介入することとなるので、物体が首尾良く船上に引揚
げられる為には、物体が前記船首凹状間隙を通過しなけ
ればならない。In such a situation, the bow section will intervene between the object and the hoisting equipment, so the object must pass through the bow concave gap in order to be successfully hoisted onto the ship.
ところが、物体は、その大きさや状態によっては、凹状
間隙内に挾まったり、或は、引っ掛かったりしてスムー
ズに凹状間隙を通過することができず、その船上への引
揚げが不能な状態に陥ってしまうことがあった。However, depending on the size and condition of the object, the object may become stuck or caught in the concave gap and cannot pass smoothly through the concave gap, making it impossible to retrieve it onto the ship. There were times when I ended up.
また、たとえ物体が凹状間隙を無事通過したとしても、
複雑な船体表面の比較的広範囲に亘って密着した状態で
引揚げることとなって、物体には犬なる移動抵抗力が働
く為に、その抵抗力に抗するに十分な極めて犬なる引揚
力が必要となシ、引揚物体の重量よりもはるかに大きい
重量に見合う大規模な引揚設備を要することとなってい
た。Also, even if the object passes through the concave gap safely,
Since the object is being towed in close contact with a relatively wide area of the complex surface of the ship, a strong force of movement resistance acts on the object. This required large-scale retrieval equipment that could handle a much larger weight than the object to be salvaged.
また、例えば第２図に示すように船首バルブ付船舶の船
体表面の修理や塗装作業等の際に、タグボート等の小船
Ｃが、水面下のバルバスバウの存在に気付かずに、船首
バルブ付船舶の船首凹状間隙内を通過しようとして、そ
の船底や推進器ｄ或は舵ｅ等を、更には前記バルバスバ
ウをも損傷してしまうという事故が起シがちであシ極め
て危険であった。For example, as shown in Figure 2, when repairing or painting the hull surface of a vessel equipped with a bow valve, a small boat C such as a tugboat may damage the vessel with a bow valve without noticing the presence of the bulbous bow under the water surface. When attempting to pass through the bow concave gap, accidents tend to occur in which the bottom, propulsion device d, rudder e, etc., and even the bulbous bow are damaged, which is extremely dangerous.
本発明は１．冒記したような船首バルブ付船舶を、その
優れた特性を損なうことなり、シかも、上述したような
種々の不都合を生じないものに改良することを主たる目
的とする。The present invention consists of 1. The main object of the present invention is to improve a ship equipped with a bow valve as described above to one that does not impair its excellent characteristics and does not cause the various inconveniences mentioned above.
上記目的を達成する為に、本発明は、冒記した船首バル
ブ付船舶において、前記上部軸先から前記下部バルバス
バウに亘って、前記下部バルバスバウの平均的横幅に比
べて小さな横幅の薄幅部材を設けであることを特徴とす
る。In order to achieve the above object, the present invention provides the aforementioned ship with a bow valve, in which a thin member having a width smaller than the average width of the lower bulbous bow is provided from the tip of the upper shaft to the lower bulbous bow. It is characterized by being provided.
つまり、上部軸先から下部バルバスバウに亘って、後記
するように船体抵抗を殆ど増加させることが無く、また
、バルバスバウの特性を殆ど変化させることの無い薄幅
の部材を設けることによシ、船首プロフィルにおける凹
状間隙が少なくとも部分的に閉鎖されることになって、
船上への引揚物体や他の小船等の前記船首凹状間隙内へ
の入り込みが有効に阻止されるのであシ、従って、前述
したような種々の不都合の発生を極めて効果的に防止し
うるに至ったのである。In other words, by providing a thin member extending from the upper shaft tip to the lower bulbous bow, which hardly increases the hull resistance or changes the characteristics of the bulbous bow, as described later, the bow the concave gap in the profile is at least partially closed;
This effectively prevents objects to be salvaged on board the ship and other small boats from entering the bow concave gap, and therefore the occurrence of the various inconveniences mentioned above can be extremely effectively prevented. It was.
また、本発明による船首バルブ付船舶は、上述のような
利点を有するのみならず、以下に述べるような効果をも
奏するものである。Further, the ship with a bow valve according to the present invention not only has the above-mentioned advantages, but also has the following effects.
船舶はその航行中に流木等の海上浮遊物に衝突して船首
外板を損傷することが少なくない。During navigation, ships often collide with floating objects such as driftwood, causing damage to their bow shells.
そして、その損傷した外板の修復は船首形状の複雑さ故
に一般に極めて面倒で、かつ、多大な経費や費用を要す
るものであった。Due to the complexity of the shape of the bow, repairing the damaged skin is generally extremely troublesome and requires a great deal of expense.
ところが、上記構成を有する本発明による船首バルブ付
船舶においては、たとえ海上浮遊物等に衝突したとして
も、それが直接船首外板に当たることはなく先ず前記薄
幅部材に当たることになるので、大抵の場合、損傷する
のは薄幅部材だけで済み、従ってその修復は極めて容易
であり、短時間で安価にできる。However, in the ship with the bow valve according to the present invention having the above configuration, even if it collides with a floating object on the sea, it will not directly hit the bow outer plate but will first hit the thin member, so in most cases In this case, only the thin member is damaged, and its repair is therefore extremely easy, quick and inexpensive.
なお、前記薄幅部材は、前記船首プロフィルにおける凹
状間隙を全体的に閉鎖する板状体であつても、あるいは
、部分的に閉鎖する板状体又は小径の柱状体であっても
よい。The thin member may be a plate-like member that completely closes the concave gap in the bow profile, or may be a plate-like member that partially closes the concave gap or a small-diameter columnar member.
また、薄幅部材の幅厚は、バルバスバウの効果を低減さ
せるほどに厚くしない限り、強度上の観点等から任意に
設計すればよい。Further, the width and thickness of the thin member may be arbitrarily designed from the viewpoint of strength, etc., as long as it is not so thick as to reduce the bulbous bow effect.
更に、念の為に付記すれば、前記薄幅部材を設けること
による剰余抵抗増加は、第３図に示すように、前記凹状
間隙全体を閉鎖する板状体ｆである場合でさえも十分無
視しうる程度の極めて僅かなものであシ、薄幅部材を設
けても前記バルバスバウの基本的利点を損なうことはな
いことが明らかである。Furthermore, just to be sure, the increase in residual resistance due to the provision of the thin member can be completely ignored even in the case of the plate-like body f closing the entire concave gap, as shown in FIG. It is clear that the provision of a thin member does not impair the fundamental advantages of the bulbous bow.
以上述べたところを要約して換言するに、本発明は、船
首パルプ付船舶というものは必然的に船首プロフィルに
おける凹状間隙を有するものであるという従来の船型設
計上の常識を打破し、その結果、船首プロフィルにおけ
る凹状間隙が少なくとも部分的に閉鎖された船首船型を
有する新規で、かつ、種々の優れた効果を奏する船首バ
ルブ付船舶を提供しうるに至ったものである。To summarize and paraphrase what has been said above, the present invention breaks down the conventional wisdom in ship design that ships with bow pulp necessarily have a concave gap in the bow profile, and as a result, Accordingly, it has been possible to provide a new ship with a bow valve having a bow shape in which the concave gap in the bow profile is at least partially closed, and which exhibits various excellent effects.
そして、本発明は、新造船舶に限らず既存の船舶にも比
較的簡単な工事にて適用しうるものであって、産業上利
用価値が極めて太きい。The present invention can be applied not only to newly built ships but also to existing ships with relatively simple construction, and has extremely great industrial value.
本発明のその他の目的並びに利点は以下の記載から明ら
かとなろう。Other objects and advantages of the invention will become apparent from the description below.
以下、本発明の各種実施例を第４図以下の例示図に基づ
いて詳述する。Hereinafter, various embodiments of the present invention will be described in detail based on the illustrative diagrams shown in FIG. 4 and below.
第４図及び第５図は本発明の第１実施例を示し、船首部
分１において夫々前方に突出する上部軸先２と下部バル
バスバウ３の間に形成される側面視における凹状間隙の
実質的全体を閉鎖する状態に、前記バルバスバウ３の平
均的横幅に比べて小さな幅の薄幅部材４（以下、単に薄
幅部材４と称する）としての薄幅板状体４ａを、前記上
部軸先２から下部バルバスバウ３に亘って、かつ、船体
縦中心線Ｘ上に配設固定しである。4 and 5 show a first embodiment of the present invention, in which substantially the entire concave gap in side view is formed between the upper axle tip 2 and the lower bulbous bow 3 that respectively protrude forward in the bow portion 1. In the closed state, a thin plate-shaped body 4a as a thin member 4 (hereinafter simply referred to as thin member 4) having a width smaller than the average width of the bulbous bow 3 is inserted from the upper shaft tip 2. It is arranged and fixed over the lower bulbous bow 3 and on the longitudinal centerline X of the hull.
なお、前記板状体４ａの水平横断面前端部分を実質的に
半円形のなめらかな曲線にて形成してあシ、もって、板
状体４ａの前端縁にロープ等の物体引揚用部材が密着し
て移動する際に損傷することのないよう配慮しである。Note that the front end portion of the horizontal cross section of the plate-like body 4a is formed into a substantially semicircular smooth curve, so that an object hoisting member such as a rope can be tightly attached to the front edge of the plate-like body 4a. Care should be taken to prevent damage when moving.
第６図及び第７図は本発明の第２実施例を示し、前記薄
幅部材４として、第１実施例における板状体４ａに代え
て、前端をリーディングエツジとする実質的に翼形の水
平横断面を有する薄幅板状体４ｂを採用したものである
。6 and 7 show a second embodiment of the present invention, in which the thin member 4 is a substantially airfoil-shaped member having a leading edge at the front end, instead of the plate-like member 4a in the first embodiment. A thin plate-like body 4b having a horizontal cross section is employed.
前記翼形断面板状体４ｂは、船首部分１の側面視におけ
る凹状間隙を部分的に閉鎖する状態に配設固定された小
型のものであるが、前記凹状間隙内への他物体の入し込
みを阻止するに十分であり、かつ、小型であるが故にこ
れを設けることによる摩擦抵抗増加を極めて小さく抑え
ることができる利点がある。The airfoil-shaped cross-section plate-like body 4b is a small piece arranged and fixed in a state that partially closes a concave gap in a side view of the bow portion 1, but it prevents other objects from entering the concave gap. It is sufficient to prevent jamming, and since it is small, it has the advantage that the increase in frictional resistance due to its provision can be kept extremely small.
第８図及び第９図は本発明の第３実施例を示し、前記薄
幅部材４として、第１実施例における板状体４ａ或は第
２実施例における翼形断面板状体４ａに代えて、実質的
に円形の水平横断面を有する小径柱状体４ｃを採用した
ものである。8 and 9 show a third embodiment of the present invention, in which the thin member 4 is replaced with the plate-like body 4a in the first embodiment or the airfoil-shaped cross-section plate-like body 4a in the second embodiment. Therefore, a small diameter columnar body 4c having a substantially circular horizontal cross section is employed.
この円形断面小径柱状体４ｃを採用することには、丸棒
を上部軸先２から下部バルバスバウ３に亘ってその両端
において固定するだけでよく極めて工事が簡単ですむ利
点がある。Adopting this circular cross-section small-diameter columnar body 4c has the advantage that the construction is extremely simple, as it is only necessary to fix the round bar at both ends from the upper shaft tip 2 to the lower bulbous bow 3.
第１０図と第１１図、及び第１２図と第１３図は、夫々
、上述の第１実施例及び第２実施例に更に改良を加えた
第４実施例及び第５実施例を示すものであって、前記薄
幅部材４ａ、４ｂの前縁部分の上下中間部分を略水平方
向に、回転自在なローラ４ ａ’ ｔ ４ ｂ’に構成
したものである。Figures 10 and 11, and Figures 12 and 13 show a fourth and fifth embodiment, respectively, which are further improvements to the first and second embodiments described above. The upper and lower intermediate portions of the front edge portions of the thin members 4a and 4b are configured as rollers 4a't4b' that are freely rotatable in a substantially horizontal direction.
この構成によれば、引揚用部材や引揚物体が薄幅部材４
、４ ａ。According to this configuration, the salvage member and the salvaged object are connected to the thin member 4.
, 4 a.
４ｂの前縁部分に密着して移動する際の摩擦抵抗を極め
て小さなものにできる。Frictional resistance when moving in close contact with the front edge portion of 4b can be made extremely small.
更にまだ、前記ローラ４ ａ／ 、 ４ ｂ／をゴム等
の弾性材にて構成すれば引揚用物体や引揚物体への当シ
もソフトであるし、また、錆付き等の問題も無くより一
層好ましい。Furthermore, if the rollers 4 a/ and 4 b/ are made of an elastic material such as rubber, they will be soft against the object to be salvaged and the object to be salvaged, and there will be no problems such as rusting. preferable.
第１４図と第１５図、及び、第１６図と第１７図は、夫
々、第６実施例及び第７実施例を示し、上述の第４実施
例及び第５実施例と同様の目的の下に、第３実施例を更
に改良したものである。FIGS. 14 and 15, and FIGS. 16 and 17 respectively show a sixth embodiment and a seventh embodiment, which have the same purpose as the fourth and fifth embodiments described above. This is a further improvement of the third embodiment.
第６実施例においては、固設された前記円形断面柱状体
４ｃの上下中間部分はぼ全長に亘って、実質的にその軸
芯Ｙ周りに、つまり略水平方向に回転自在な弾性体より
成るローラ４ｃ′に構成しである。In the sixth embodiment, the upper and lower intermediate portions of the fixedly installed circular cross-section columnar body 4c are made of an elastic body that is substantially rotatable around the axis Y, that is, approximately horizontally, over almost the entire length. It consists of a roller 4c'.
また、第７実施例においては、円形断面柱状体４ｃを、
上部軸先２に穿設した貫通孔５と下部バルバスバウに穿
設した凹孔６とに亘って遊嵌してあり、もって、円形断
面柱状体４ｃがそれ自体としてその軸芯Ｙ周りに、つま
り略水平方向に回転自在であるように構成しである。In addition, in the seventh embodiment, the circular cross-section columnar body 4c is
It is loosely fitted between the through hole 5 drilled in the upper shaft tip 2 and the recess hole 6 drilled in the lower bulbous bow, so that the circular cross-section columnar body 4c itself rotates around its axis Y, i.e. It is configured to be freely rotatable in a substantially horizontal direction.
更に、また、第７実施例においては、円形断面柱状体４
ｃを前記貫通孔５を通して抜差自在に構成しである。Furthermore, in the seventh embodiment, the circular cross-section columnar body 4
c can be inserted and removed freely through the through hole 5.
第１８図は本発明の第８実施例を示し、前記薄幅部材４
を船首部分１側面視における凹状間隙から退去する位置
に移動可能に構成すべく、薄幅部材４をその上端におい
て上部軸先２先端部に枢支連結し、もって、前記枢支部
横軸芯Ｚ周シに回動自在に構成しである。FIG. 18 shows an eighth embodiment of the present invention, in which the thin member 4
The thin member 4 is pivotally connected to the tip of the upper shaft tip 2 at its upper end so that the thin member 4 can be moved to a position where it leaves the concave gap in a side view of the bow portion 1. It is configured to be rotatable around the circumference.
そして、薄幅部材４の前縁下端部には回動操作具７とし
てのフック付チェーン７ａを着脱自在に付設すると共に
、船上ウィンチ８によって巻揚げ及び延出可能に構成し
てあり、もって薄幅部材４を任意の位置に移動固定自在
に構成しである。A chain 7a with a hook as a rotating operation tool 7 is detachably attached to the lower end of the front edge of the thin member 4, and is configured to be hoisted and extended by a shipboard winch 8, thereby making the thin member 4 thinner. The width member 4 is configured to be movable and fixed at any position.
なお、との回動操作具７としては、フック付チェーン７
ａに限らず種々の装置が考えられるが任意に選択採用す
ればよい。In addition, as the rotation operating tool 7, a chain 7 with a hook is used.
Various devices other than a are possible, and any device may be selected and adopted.
以上、本発明の種々の実施の態様を例示したが、要する
に、船首バルブ付船舶の上部軸先と下部バルバスバウの
間に形成される側面視における凹状間隙の少なくとも一
部を閉鎖する薄幅部材を設けてあればよく、上述の実施
例の他にも種々の変形が可能である。Various embodiments of the present invention have been illustrated above, but in short, a thin member that closes at least a part of a concave gap in side view formed between an upper shaft tip and a lower bulbous bow of a ship with a bow valve is described. It is sufficient if it is provided, and various modifications are possible in addition to the above-mentioned embodiment.
図面は本発明に係る船首パルプ付船舶の各称実施例を示
し、第１図、第２図、及び第３図は目的及び作用効果等
に関する説明図、第４図は第１実施例の要部側面図、第
５図は第４図のＡ−Ａ矢視図、第６図は第２実施例の要
部側面図、第７図は第５図のＢ−Ｂ矢視図、第８図は第
３実施例の要部側面図、第９図は第８図のＣ−Ｃ矢視図
、第１０図は第４実施例の要部側面図、第１１図は第１
０図のＤ−Ｄ矢視図、第１２図は第５実施例の要部側面
図、第１３図は第１２図のＥ−Ｅ矢視図、第１４図は第
６実施例の要部側面図、第１５図は第１４図のＦ−Ｆ矢
視図、第１６図は第７実施例の要部側面図、第１７図は
第１６図のＧ−Ｃ矢視図、そして、第１８図は第８実施
例の要部側面図である。
１・・・・・・船首部分、２・・・・・・上部軸先、３
・・・・・・下部バルバスバウ、４・・・・・・薄幅部
材、４ａ・・・・・・板状体、４ｂ・・・・・・翼形断
面板状体、４ｃ・・・・・・円形断面小径柱状体、４ａ
′、４ｂ′、４０′・・・・・・ローラ、７°・・・・
・・回動操作具、Ｘ・・・・・・船体縦中心線、Ｙ・・
・・・・円形断面小径柱状体軸芯、Ｚ・・・・・・枢支
部横軸窓。The drawings show various embodiments of the ship with bow pulp according to the present invention, FIG. 1, FIG. 2, and FIG. 3 are explanatory diagrams regarding the purpose and effects, etc., and FIG. FIG. 5 is a side view of the main part of the second embodiment, FIG. 5 is a view taken along the line A-A in FIG. 4, FIG. The figure is a side view of the main part of the third embodiment, FIG. 9 is a view taken along the line C-C in FIG.
FIG. 12 is a side view of the main part of the fifth embodiment, FIG. 13 is a view along the E-E arrow of FIG. 12, and FIG. 14 is a main part of the sixth embodiment. A side view, FIG. 15 is a view taken along the line FF in FIG. 14, FIG. 16 is a side view of main parts of the seventh embodiment, FIG. FIG. 18 is a side view of essential parts of the eighth embodiment. 1... Bow part, 2... Upper shaft tip, 3
...Lower bulb bow, 4...Thin width member, 4a...Plate body, 4b...Airfoil cross section plate body, 4c... ...Circular cross section small diameter columnar body, 4a
', 4b', 40'...Roller, 7°...
...Rotation control tool, X...Hull longitudinal center line, Y...
...Circular cross-section small diameter columnar body axis, Z...Pivotal horizontal axis window.
Claims (1)
と下部バルバスバウ３を有する船首バルブ付船舶であっ
て、前記上部軸先２から前記下部バルバスバウ３に亘っ
て、前記下部バルバスバウ３の平均的横幅に比べて小さ
な横幅の薄幅部材４を設けであることを特徴とする船首
バルブ付船舶。 ２ 前記薄幅部材４を、実質的に船体縦中心線Ｘ上に位
置させであることを特徴とする特許請求の範囲第１項に
記載の船首バルブ付船舶。 ３ 前記薄幅部材４は、前記上部軸先２と下部バルバス
バウ３との間に形成された側面視における凹状間隙の実
質的全体を閉鎖する板状体４ａであることを特徴とする
特許請求の範囲第２項に記載の船首バルブ付船舶。 ４ 前記薄幅部材４としての板状体４ａを、その横断面
前端部分が実質的に半円形のなめらかな曲線をなすよう
に形成しであることを特徴とする特許請求の範囲第３項
に記載の船首バルブ付船舶。 ５ 前記薄幅部材４は、その前端をリーディングエツジ
とする実質的に翼形の横断面を有する板状体４ｂである
ことを特徴とする特許請求の範囲第２項に記載の船首バ
ルブ付船舶。 ６ 前記薄幅部材４は、実質的に円形の横断面を有する
小径柱状体４ｃであることを特徴とする特許請求の範囲
２項に記載の船首バルブ付船舶。 ７ 前記薄幅部材４を、前記上部軸先２と下部バルバス
バウ３との間に形成された側面視における凹状間隙から
退去する位置に移動可能に構成しであることを特徴とす
る特許請求の範囲第２項に記載の船首バルブ付船舶。 ８ 前記薄幅部材４を、その上端において前記上部軸先
２に枢支連結し、もって、前記枢支部横軸芯Ｚ周りに回
動自在に構成しであることを特徴とする特許請求の範囲
第１項に記載の船首バルブ付船舶。 ９ 前記薄幅部材４に回動操作具７を連設しであること
を特徴とする特許請求の範囲８・項に記載の船首バルブ
付船舶。[Claims] 1. Upper shaft tips 2 each protruding forward in the bow portion 1.
and a lower bulbous bow 3, in which a thin member 4 having a width smaller than the average width of the lower bulbous bow 3 is provided extending from the upper shaft tip 2 to the lower bulbous bow 3. A ship with a bow valve, characterized by: 2. A ship with a bow valve according to claim 1, wherein the thin member 4 is located substantially on the longitudinal centerline X of the hull. 3. The thin member 4 is a plate-shaped body 4a that closes substantially the entire concave gap formed between the upper shaft tip 2 and the lower bulbous bow 3 in a side view. Vessels with bow valves as described in Scope 2. 4. Claim 3, characterized in that the plate-like member 4a serving as the thin member 4 is formed so that its front end portion in cross section forms a substantially semicircular smooth curve. Vessel with bow valve as described. 5. The ship with a bow valve according to claim 2, wherein the thin member 4 is a plate-like member 4b having a substantially airfoil-shaped cross section with its front end as a leading edge. . 6. The ship with a bow valve according to claim 2, wherein the thin member 4 is a small diameter columnar body 4c having a substantially circular cross section. 7. Claims characterized in that the thin member 4 is configured to be movable to a position where it exits a concave gap in side view formed between the upper shaft tip 2 and the lower bulbous bow 3. A vessel equipped with a bow valve as described in paragraph 2. 8. Claims characterized in that the thin member 4 is pivotally connected to the upper shaft end 2 at its upper end, thereby being configured to be freely rotatable around the horizontal pivot axis Z. A vessel equipped with a bow valve as described in paragraph 1. 9. A ship with a bow valve according to claim 8, characterized in that a rotation operating tool 7 is connected to the thin member 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55101024A JPS5920512B2 (en) | 1980-07-22 | 1980-07-22 | Vessel with bow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55101024A JPS5920512B2 (en) | 1980-07-22 | 1980-07-22 | Vessel with bow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5726074A JPS5726074A (en) | 1982-02-12 |
| JPS5920512B2 true JPS5920512B2 (en) | 1984-05-14 |
Family
ID=14289622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55101024A Expired JPS5920512B2 (en) | 1980-07-22 | 1980-07-22 | Vessel with bow valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5920512B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0316236Y2 (en) * | 1984-11-08 | 1991-04-08 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5790283A (en) * | 1980-11-25 | 1982-06-04 | Mitsubishi Heavy Ind Ltd | Boat with wave break reduction device |
| JP4686082B2 (en) * | 2001-09-18 | 2011-05-18 | ホクモウ株式会社 | Stationary fishing boat |
| JP3571023B2 (en) | 2001-11-22 | 2004-09-29 | 株式会社川崎造船 | Ship bow shape |
| JP5028000B2 (en) * | 2005-09-09 | 2012-09-19 | 三井造船株式会社 | Ship |
| RU2514964C2 (en) * | 2009-02-16 | 2014-05-10 | Роллс-Ройс Марин АС | Bow bulb design |
| JP2012162116A (en) * | 2011-02-03 | 2012-08-30 | Unjo Senpaku Kogyo Kk | Wave shock relieving device |
-
1980
- 1980-07-22 JP JP55101024A patent/JPS5920512B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0316236Y2 (en) * | 1984-11-08 | 1991-04-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5726074A (en) | 1982-02-12 |
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