JP4734644B2 - Marine antiseptic - Google Patents

Marine antiseptic Download PDF

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JP4734644B2
JP4734644B2 JP2006065598A JP2006065598A JP4734644B2 JP 4734644 B2 JP4734644 B2 JP 4734644B2 JP 2006065598 A JP2006065598 A JP 2006065598A JP 2006065598 A JP2006065598 A JP 2006065598A JP 4734644 B2 JP4734644 B2 JP 4734644B2
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marine
plate
hull
preservative
antiseptic
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JP2007238008A (en
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敏彦 川島
政治 佐藤
和睦 鬼追
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Yanmar Co Ltd
Fisheries Research Agency
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Yanmar Co Ltd
Fisheries Research Agency
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Description

本発明は、喫水線以下の鋼製の船体及び船体付加物の表面に設けられ、船体及び船体付加物の材料である金属よりイオン化傾向の大きい金属で形成される舶用防腐板の形状及び構造に関する。   The present invention relates to the shape and structure of a marine antiseptic plate that is provided on the surface of a steel hull and hull appendage below the waterline and is made of a metal that has a higher ionization tendency than the metal that is the material of the hull and hull adjunct.

舶用防腐板は、鋼製の船体の海水による腐食防止のために、船体外板並びにビルジキール及び舵などの船体付加物表面に取り付けられる構造体である。舶用防腐板は公知であり、例えば、特許文献１で開示されている。この舶用防腐板は、化学成分（ＰＨ）が船体と異なり、船体鋼板より腐食しやすい金属材料にて形成され、船体外板並びにビルジキール及び舵などの船体付加物表面の腐食防止を可能にしている。舶用防腐板は、箱形の形状（直方体）が採用され、材質は亜鉛やアルミニウム製が多く、取り付け枚数はそのサイズ或いは航海対象海域の塩密度等により決定される。また、舶用防腐板は、一度取り付けられ航海に入ると、腐食が進み、１〜２年毎のドック入りのときに取り替えられる。このように、舶用防腐板は、鋼製船舶では不可欠な装置であるが、消耗品であることもあり、地味な存在である。
特許第３３８４８８４号公報 The marine preservative plate is a structure that is attached to the hull outer plate and the surface of a hull appendage such as a bilge keel and a rudder in order to prevent corrosion of the steel hull by seawater. Marine preservative plates are known and disclosed, for example, in Patent Document 1. Unlike the hull, this marine antiseptic plate is made of a metal material that is more easily corroded than the hull steel plate, making it possible to prevent hull outer plates and the surface of hull appendages such as bilge keels and rudders from being corroded. . The marine preservative plate has a box shape (cuboid), and the material is often made of zinc or aluminum. The number of attached plates is determined by the size or the salt density of the voyage target sea area. Further, once the marine preservative plate is attached and enters a voyage, the corrosion proceeds and is replaced when the dock is entered every one to two years. As described above, the marine antiseptic plate is an indispensable device in a steel vessel, but may be a consumable item and is a quiet existence.
Japanese Patent No. 338484

舶用防腐板は、船体と比較すると小さな構造体であるが、船の航走に伴う流れが防腐板に衝突し、流れの剥離現象に基づく逆流が誘発され抵抗増加が発生する。この抵抗増加は、船舶の省エネ性能を低下させる。そこで、解決しようとする課題は、舶用防腐板の抵抗を低減することである。   The marine antiseptic plate is a small structure compared to the hull, but the flow accompanying the ship's sailing collides with the antiseptic plate, and a reverse flow based on the flow separation phenomenon is induced to increase resistance. This increase in resistance reduces the energy saving performance of the ship. Therefore, the problem to be solved is to reduce the resistance of the marine antiseptic plate.

本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。   The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

請求項１においては、喫水線以下の鋼製の船体及び船体付加物の表面に設けられ、船体及び船体付加物の材料である金属よりイオン化傾向の大きい金属で形成される舶用防腐板において、該舶用防腐板の表面は流線形であるとともに、前記舶用防腐板の表面に形成される取り付け部である凹部と、該凹部に嵌合し表面が前記舶用防腐板の表面の流線形にしたがう形状である蓋を備え、該蓋を貫通するネジ穴を備えたものである。 According to claim 1, a marine antiseptic plate provided on the surface of a steel hull and hull appendage below the waterline and formed of a metal having a higher ionization tendency than a metal that is a material of the hull and hull adjunct. The surface of the preservative plate is streamlined, and has a concave portion that is an attachment portion formed on the surface of the marine preservative plate, and a shape that fits into the concave portion and follows the streamline of the surface of the marine preservative plate. A lid is provided , and a screw hole penetrating the lid is provided.

請求項２においては、喫水線以下の鋼製の船体及び船体付加物の表面に設けられ、船体及び船体付加物の材料である金属よりイオン化傾向の大きい金属で形成される舶用防腐板において、長手方向に対し平行かつ船体設置面に対し直角であり、短手方向の少なくとも中央近傍の断面形状について、流体と接する側を流線形とし、船体設置面の輪郭形状を流線形とし、長手方向に対し直角かつ船体設置面に対し直角である断面形状を曲線形状とし、前記舶用防腐板の表面に形成される凹部と、前記凹部に嵌合し表面が流線形である蓋を備え、該蓋を貫通するネジ穴を備えたものである。 In a marine antiseptic plate, which is provided on the surface of a steel hull and hull appendage below the waterline and is formed of a metal having a higher ionization tendency than a metal which is a material of the hull and hull appendage, The cross-sectional shape at least near the center in the short direction is streamlined on the side in contact with the fluid, the contour shape of the hull installation surface is streamlined, and perpendicular to the longitudinal direction. The cross-sectional shape perpendicular to the hull installation surface is a curved shape, and includes a recess formed on the surface of the marine preservative plate, a lid that fits into the recess and has a streamlined surface, and penetrates the lid It has a screw hole.

本発明の効果として、以下に示すような効果を奏する。   As effects of the present invention, the following effects can be obtained.

本発明によれば、舶用防腐板の表面の凹部に蓋を取り付けた状態でも、舶用防腐板の表面の流線形が変わることがないので、舶用防腐板の抵抗低減効果を損なうことなく、流体中における流れの剥離を消滅させて、船舶航走中の抵抗を低減できる。この抵抗低減により、船舶の燃費低減が可能となる。   According to the present invention, since the streamline of the surface of the marine preservative plate does not change even when the lid is attached to the concave portion of the surface of the marine preservative plate, the resistance reduction effect of the marine preservative plate is not impaired. This eliminates the flow separation and reduces resistance during ship navigation. This resistance reduction makes it possible to reduce the fuel consumption of the ship.

また、蓋に設けたネジ穴に、蓋取り外し用のボルト治具をねじ込むことにより、蓋の取り外しが容易にできるとともに、舶用防腐板を船体より容易に取り外すことができる。つまり、舶用防腐板の交換作業の作業性を向上できる。 Further, by screwing a bolt jig for removing the lid into the screw hole provided in the lid, the lid can be easily removed and the marine preservative plate can be easily removed from the hull. That is, the workability of the marine antiseptic plate replacement work can be improved.

次に、発明の実施の形態を説明する。   Next, embodiments of the invention will be described.

図１は舶用防腐板を設置した船舶の側面図、図２は本発明の実施例に係る舶用防腐板の斜視図、図３は同じく平面図である。図４は（ａ）図３における縦断面ＡＡ´を示す断面図（ｂ）同じく横断面ＢＢ´を示す断面図、図５は別実施例である舶用防腐板について、縦断面ＡＡ´に相当する部分を示した断面図、図６は船体外板並びにビルジキール及び舵などの船体付加物表面に取り付けた舶用防腐板の縦断面ＡＡ´を示す断面図である。図７は船体外板並びにビルジキール及び舵などの船体付加物表面より取り外す状態を示した舶用防腐板の縦断面ＡＡ´を示す断面図である。   1 is a side view of a ship provided with a marine preservative plate, FIG. 2 is a perspective view of the marine preservative plate according to an embodiment of the present invention, and FIG. 3 is a plan view of the same. 4A is a sectional view showing a longitudinal section AA ′ in FIG. 3, FIG. 4B is a sectional view showing a transverse section BB ′, and FIG. 5 corresponds to a longitudinal section AA ′ of a marine antiseptic plate which is another embodiment. FIG. 6 is a sectional view showing a longitudinal section AA ′ of a marine preservative plate attached to the surface of a hull outer plate and a hull appendage such as a bilge keel and a rudder. FIG. 7 is a sectional view showing a longitudinal section AA ′ of a marine preservative plate showing a state of being removed from the hull outer plate and the surface of a hull appendage such as a bilge keel and a rudder.

本発明の実施例を、大きさが約４００トン程度の遠洋マグロ延縄漁船とする。この遠洋マグロ延縄漁船は、遠洋マグロ延縄漁業に使用される漁船である。遠洋マグロ延縄漁業とは、延縄を用いてマグロを捕獲する漁業である。図１に示すように、漁船１の船上には、マグロを引き揚げるための切り込み２、延縄漁船特有の長いロープを扱うラインホーラー( 揚縄機) ３、ラインワインダー（揚縄時の幹縄の処理・格納) ４などが装備されている。また、捕獲したマグロの鮮度を保つために、−６０℃の超低温で冷凍する冷凍機室５及び急速凍結室６が、船体内部に設けられている。冷凍されたマグロは、同じく船体内部に多数設けられた魚倉７に保存される。   An embodiment of the present invention is a pelagic tuna longline fishing boat having a size of about 400 tons. This pelagic tuna longline fishing boat is a fishing boat used for pelagic tuna longline fishing. The pelagic tuna longline fishery is a fishery that uses tuna to capture tuna. As shown in Fig. 1, on the fishing boat 1, there are a notch 2 for lifting tuna, a line hauler (line-lifting machine) 3 for handling long ropes peculiar to longline fishing boats, and a line winder (main-line processing at the time of lifting).・ Storage) 4 etc. are equipped. Moreover, in order to maintain the freshness of the captured tuna, a refrigerator room 5 and a quick freezing room 6 that are frozen at an extremely low temperature of −60 ° C. are provided inside the hull. The frozen tuna is stored in a fishhouse 7 that is also provided in the hull.

舶用防腐板１０は、鋼製による船体の海水による腐食防止のために、船体外板９並びにビルジキール５１及び舵５２などの船体付加物表面に取り付けられる構造体である。一般には、海水による腐食防止を考慮して、喫水線以下の船体外板９に取り付けられる。この舶用防腐板１０は、化学成分（ＰＨ）が船体外板と異なり、船体外板９より腐食しやすい金属材料にて形成され、船体外板９の腐食防止に役立っている。舶用防腐板１０は、本実施例においては、材質はアルミニウム製とし、漁船１全体で取り付け枚数は８０枚程度としている。   The marine preservative plate 10 is a structure that is attached to the surface of a hull appendage such as the hull outer plate 9, the bilge keel 51, and the rudder 52 in order to prevent corrosion of the hull made of steel by seawater. Generally, it is attached to the hull outer plate 9 below the water line in consideration of prevention of corrosion by seawater. Unlike the hull outer plate, the marine antiseptic plate 10 is formed of a metal material that is more easily corroded than the hull outer plate 9, and serves to prevent the hull outer plate 9 from being corroded. In the present embodiment, the marine antiseptic plate 10 is made of aluminum, and the entire number of fishing boats 1 is about 80.

図２乃至図５に示すように、本発明の舶用防腐板１０は表面を流線形としている。ここで、説明を簡易にするために、舶用防腐板１０が漁船１に取り付けられたとき、海水の流れの方向（図２乃至図５中実線矢印）を舶用防腐板１０の長手方向とする。さらに、長手方向に対し直角かつ船体設置面に対し平行である方向（図２乃至図４中破線矢印）を短手方向とする。流線形とは、流れの中に物体を置いたとき、抵抗が著しく小さい物体形状のことをいう。流体力学では、物体形状を流線形と、鈍い形状と呼ばれる抵抗の大きい形状とに二分し、鈍い形状に対し、流線形では物体まわりの流れは剥離を伴わず抵抗レベルが極めて小さいことが古くから知られている。このように、流線形物体では，物体表面から境界層と呼ばれる薄い渦層が影離しないため，逆流の発生が抑えられる傾向にある。その結果，エネルギー損失が少なくなり，流線形物体が流体中を動くとき，例えば、球のようにずんぐりした鈍い物体形状より、抵抗が格段に小さいことが理論上分かっている。一般に、流線形とは細長くて先端が丸く後端が尖る形状である。ここで、図３に示すように、舶用防腐板１０が漁船１に取り付けられたとき、舶用防腐板１０の前後方向（図中矢印方向）が海水の流れる方向となる。概して、舶用防腐板１０において、海水の流れる方向と船舶の進行方向（図１中実線矢印）はほぼ反対方向となるが、舶用防腐板１０の取り付け向きによっては異なる場合がある。例えば、漁船１後部に取り付けられる舶用防腐板１０は、舶用防腐板１０の前後方向と船舶の進行方向は同一ではない。本実施例では、取り付け場所に限られることなく、舶用防腐板１０の長手方向が海水の流れる方向となる。   As shown in FIGS. 2 to 5, the marine preservative plate 10 of the present invention has a streamlined surface. Here, in order to simplify the description, when the marine preservative plate 10 is attached to the fishing boat 1, the direction of the seawater flow (solid arrow in FIGS. 2 to 5) is the longitudinal direction of the marine preservative plate 10. Further, a direction perpendicular to the longitudinal direction and parallel to the hull installation surface (broken line arrow in FIGS. 2 to 4) is a short direction. Streamline refers to an object shape that has a remarkably small resistance when an object is placed in the flow. In hydrodynamics, the shape of an object is divided into a streamline and a shape with a high resistance called a dull shape. Are known. As described above, in a streamlined object, a thin vortex layer called a boundary layer is not shadowed from the object surface, so that the occurrence of backflow tends to be suppressed. As a result, energy loss is reduced, and it is theoretically known that when a streamlined object moves in a fluid, for example, the resistance is much smaller than a dull object shape like a sphere. In general, a streamline is an elongated shape with a rounded tip and a sharp rear end. Here, as shown in FIG. 3, when the marine preservative plate 10 is attached to the fishing boat 1, the front-rear direction (arrow direction in the figure) of the marine preservative plate 10 is the direction in which seawater flows. In general, in the marine preservative plate 10, the flow direction of seawater and the traveling direction of the marine vessel (solid arrow in FIG. 1) are almost opposite directions, but may differ depending on the mounting direction of the marine preservative plate 10. For example, in the marine preservative plate 10 attached to the rear part of the fishing boat 1, the front-rear direction of the marine preservative plate 10 and the traveling direction of the marine vessel are not the same. In the present embodiment, the longitudinal direction of the marine antiseptic plate 10 is the direction in which seawater flows without being limited to the mounting location.

舶用防腐板１０の設置面１５は、船体外板９に接する設置面である。設置面１５は、頂点３０と輪郭曲線２０にて形成されている。この形状は平面視において流線形であることを特徴としている。また、舶用防腐板１０の縦断面ＡＡ´は舶用防腐板１０の長手方向の断面である。この縦断面ＡＡ´は、設置面１５と海水と接する表面を形成する縦断面輪郭曲線２１にて形成されている。この縦断面輪郭曲線２１は流線形であることを特徴としている。さらに、舶用防腐板１０の横断面ＢＢ´は舶用防腐板１０の長手方向に対して直角の断面である。この横断面ＢＢ´は、設置面１５と表面を形成する横断面輪郭曲線２２にて形成されている。この横断面ＢＢ´は、曲線形状の一つである略半楕円形状であることを特徴としている。以上のようにして形成される防腐板は、全体形状としては、平面視において前部が略半楕円形状で後部が徐々に細くなり後端で尖状となり、側面視において、下面が平板状で上面が前部より曲面状に大きく盛り上がり徐々に高さが低くなる。いわゆる、滴が流れるような流滴形状となるように構成している。   The installation surface 15 of the marine antiseptic plate 10 is an installation surface in contact with the hull outer plate 9. The installation surface 15 is formed by a vertex 30 and a contour curve 20. This shape is characterized by being streamlined in plan view. The longitudinal section AA ′ of the marine preservative plate 10 is a longitudinal section of the marine preservative plate 10. The longitudinal section AA ′ is formed by a longitudinal section contour curve 21 that forms a surface in contact with the installation surface 15 and seawater. The longitudinal section contour curve 21 is characterized by being streamlined. Further, the cross section BB ′ of the marine preservative plate 10 is a cross section perpendicular to the longitudinal direction of the marine preservative plate 10. The cross section BB ′ is formed by the installation surface 15 and a cross section contour curve 22 that forms the surface. This cross section BB ′ is characterized by a substantially semi-elliptical shape which is one of curved shapes. The antiseptic plate formed as described above has an overall shape of a substantially semi-elliptical front part in a plan view, a gradually narrowing rear part and a pointed shape at the rear end, and a flat bottom face in a side view. The upper surface rises in a curved shape from the front, and the height gradually decreases. It is configured to have a so-called flow-drop shape in which droplets flow.

このようにして、舶用防腐板１０の表面を流線形としたことで、流体中にて表面の流れの剥離を消滅させて抵抗低減効果が得られる。また、本発明の舶用防腐板１０の表面の流体中における表面積は、従来の箱形の防腐板と同等としている。つまり、舶用防腐板１０は、従来の防腐板と同等の船体外板９の腐食防止性能を維持しつつ、抵抗低減効果を達成している。   Thus, by making the surface of the marine preservative plate 10 streamlined, the separation of the surface flow in the fluid is eliminated, and a resistance reduction effect is obtained. Moreover, the surface area in the fluid of the surface of the marine antiseptic board 10 of this invention is made equivalent to the conventional box-shaped antiseptic board. That is, the marine antiseptic plate 10 achieves the resistance reduction effect while maintaining the corrosion prevention performance of the hull outer plate 9 equivalent to the conventional antiseptic plate.

なお、舶用防腐板１０の後部は比較的に薄く形成されるため、防腐板全体の腐食が進んだ場合、その部分は腐食に伴う形状の変化が大きいと考えられる。そこで、別実施例として、舶用防腐板４０について説明する。図５に示すように、舶用防腐板４０は、後端部を断面視略三角形状の比較的腐食し難い部材で構成した後端部材３１を一体的に構成している。これにより、防腐板の腐食が進んだ場合に、できるだけ一様な形状の変化にすることができる。後端部材３１は合成樹脂や無機質材等で構成することができる。   In addition, since the rear part of the marine antiseptic board 10 is formed comparatively thinly, when corrosion of the whole antiseptic board advances, it is thought that the change of the shape accompanying corrosion is large. Then, the marine preservative board 40 is demonstrated as another Example. As shown in FIG. 5, the marine preservative plate 40 integrally constitutes a rear end member 31 having a rear end portion made of a member that is substantially triangular in cross section and hardly corroded. Thereby, when corrosion of a preservative board progresses, it can be made the change of a shape as uniform as possible. The rear end member 31 can be made of a synthetic resin, an inorganic material, or the like.

舶用防腐板１０は、その抵抗低減効果を、実験によって確認している。実験において、本発明の流滴形状の防腐板１０と、従来の直方形の防腐板とを、回流水槽にて抵抗試験を行い、それぞれの抵抗を比較した。その結果、流滴形状の舶用防腐板１０は、従来の舶用防腐板に比べ、防腐板自身の抵抗を１／１０レベルにまで低減できた。さらに、実験結果より、本実施例である漁船１の防腐板を従来品から舶用防腐板１０に交換した場合は、航走速度１１ノットにおいて、約２〜３％程燃費を削減可能であることが分かった。   The marine antiseptic board 10 has confirmed the resistance reduction effect by experiment. In the experiment, a resistance test was conducted on the drop-shaped preservative plate 10 of the present invention and a conventional rectangular preservative plate in a circulating water tank, and the respective resistances were compared. As a result, the drop-shaped marine antiseptic plate 10 was able to reduce the resistance of the antiseptic plate itself to 1/10 level compared to the conventional marine antiseptic plate. Furthermore, from the experimental results, when the antiseptic plate of the fishing boat 1 according to the present embodiment is replaced from the conventional product to the antiseptic plate 10 for a ship, the fuel consumption can be reduced by about 2 to 3% at a cruising speed of 11 knots. I understood.

図６に示すように、舶用防腐板１０は２箇所の取り付け部１２にて、船体外板９に取り付けるように構成している。取り付け部１２は、舶用防腐板１０の表面に凹状に設けられて、ボルト孔を開口している。船体外板９には、ボルト棒１３が溶接されている。舶用防腐板１０は、設置面１５を貫通するボルト棒１３と、取り付け部１２内のナット１４にて、船体外板９に固定される。なお、本実施例では、取り付け部１２は長手（前後）方向に二箇所配置しているが、その数は限定するものではない。また、舶用防腐板１０は前後方向で形状が異なるため、作業者が取り付け方向を間違えないように、ボルト孔の直径が異なるように構成することもできる。蓋１１は、取り付け部１２を覆うように接着等により固定される。また、蓋１１の表面は、舶用防腐板１０の表面流線形にしたがう形状としている。つまり、舶用防腐板１０に蓋１１を施しても、舶用防腐板１０は流滴形状が形成される。この蓋１１の材質は、本実施例では特に限定しない。舶用防腐板１０と同じアルミニウム製でも良いし、取り外しを容易とするため、粘弾性のゴム部材でも良い。   As shown in FIG. 6, the marine preservative plate 10 is configured to be attached to the hull outer plate 9 at two attachment portions 12. The attachment portion 12 is provided in a concave shape on the surface of the marine antiseptic plate 10 and opens a bolt hole. A bolt rod 13 is welded to the hull outer plate 9. The marine preservative plate 10 is fixed to the hull outer plate 9 by a bolt bar 13 penetrating the installation surface 15 and a nut 14 in the attachment portion 12. In the present embodiment, two attachment portions 12 are arranged in the longitudinal (front-rear) direction, but the number is not limited. Moreover, since the shape of the marine preservative plate 10 is different in the front-rear direction, the diameter of the bolt holes may be different so that the operator does not mistake the mounting direction. The lid 11 is fixed by adhesion or the like so as to cover the attachment portion 12. Further, the surface of the lid 11 has a shape according to the surface streamline of the marine preservative plate 10. That is, even if the lid 11 is applied to the marine preservative plate 10, the marine preservative plate 10 is formed in a droplet shape. The material of the lid 11 is not particularly limited in this embodiment. It may be made of the same aluminum as the marine preservative plate 10 or may be a viscoelastic rubber member for easy removal.

また、舶用防腐板１０が腐蝕して小さくなると交換する必要があるが、前述のように、舶用防腐板１０の表面が、蓋１１によって隙間なく覆われていると、取り付け部１２は容易に取り外すことはできない。そこで、図７に示すように、蓋１１の中央にネジ穴１８を設けることで、蓋１１の舶用防腐板１０よりの取り外しを容易にできる。但し、設けるネジ穴１８の径は、舶用防腐板１０の抵抗低減できる形状に影響のないほど十分に小さいものとする。作業者は、蓋１１を取り外す際には、予め用意したボルト治具１７を、蓋１１のネジ穴１８にねじ込んでいく。ボルト治具１７の下端が、取り付け部１２内のボルト棒１３に到達すると、そのねじ込みにより蓋１１は押し上げられ、その取り外しが可能となる。このようにして、蓋１１は、容易に舶用防腐板１０より容易に取り外しできるので、防腐板１０の交換作業が容易になり、船舶のメンテナンス性が向上する。   Moreover, when the marine preservative plate 10 is corroded and needs to be reduced, as described above, when the surface of the marine preservative plate 10 is covered with the lid 11 without a gap, the mounting portion 12 is easily removed. It is not possible. Therefore, as shown in FIG. 7, by providing the screw hole 18 in the center of the lid 11, it is possible to easily remove the lid 11 from the marine preservative plate 10. However, the diameter of the screw hole 18 to be provided is sufficiently small so as not to affect the shape of the marine antiseptic plate 10 that can reduce the resistance. When the operator removes the lid 11, the bolt jig 17 prepared in advance is screwed into the screw hole 18 of the lid 11. When the lower end of the bolt jig 17 reaches the bolt rod 13 in the mounting portion 12, the lid 11 is pushed up by the screwing and can be removed. In this way, the lid 11 can be easily removed from the marine preservative plate 10, so that the preservative plate 10 can be easily replaced and the maintainability of the marine vessel is improved.

舶用防腐板１０は、交換の必要性があるが、例えば、交換作業を、船体が引き揚げられたドッグで行うとしても、１台の船舶において交換する枚数も多く、交換作業は容易ではない。本実施例のように、取り付け部１２を設けることで、交換作業を容易にし、船舶のメンテナンス性を向上している。また、蓋１１は、舶用防腐板１０の流線形状を変えることなく表面を形成されており、舶用防腐板１０の抵抗低減効果を損なうことはない。   Although the marine preservative plate 10 needs to be replaced, for example, even if the exchanging operation is performed with a dog with the hull lifted, the number of exchanging pieces in one ship is large, and the exchanging operation is not easy. By providing the attachment portion 12 as in this embodiment, the replacement work is facilitated and the maintainability of the ship is improved. Further, the lid 11 has a surface formed without changing the streamline shape of the marine preservative plate 10 and does not impair the resistance reduction effect of the marine preservative plate 10.

現在、地球温暖化防止対策の一環として、省エネ対策が課題となっている。本発明は、この省エネ対策として、漁船を含む全種類の船舶又は航走する海洋構造物に、広く応用できる。また、本実施例では、流滴形状の舶用防腐板１０を例示したが、表面が流線形であるその他の形状であっても、表面剥離が生じることなく、本実施例同様に抵抗低減効果が得られる。また、名称は異なるが、舶用防腐板同様の機能を持つ構造体は、他分野でも存在している。このような構造体についても、流体中を移動する移動物に付加される場合は、本実施例同様に表面を流線形とすることで抵抗低減効果を奏し、省エネ効果を得ることができる。   Currently, energy conservation measures are an issue as part of global warming prevention measures. The present invention can be widely applied to all kinds of ships including fishing boats or marine structures to sail as this energy saving measure. Further, in this embodiment, the drop-shaped marine antiseptic plate 10 is illustrated, but even if the surface has another shape that is streamlined, surface peeling does not occur and the resistance reduction effect is the same as in this embodiment. can get. Moreover, although the name is different, structures having functions similar to marine preservative plates exist in other fields. Even when such a structure is added to a moving object that moves in the fluid, the surface can be streamlined as in the present embodiment to achieve a resistance reduction effect and an energy saving effect.

舶用防腐板を設置した船舶の側面図。The side view of the ship which installed the marine antiseptic board. 本発明の実施例に係る舶用防腐板の斜視図。The perspective view of the marine preservative board which concerns on the Example of this invention. 同じく平面図。FIG. （ａ）図３における縦断面ＡＡ´を示す断面図（ｂ）同じく横断面ＢＢ´を示す断面図。(A) Sectional drawing which shows longitudinal cross-section AA 'in FIG. 3, (b) Sectional drawing which similarly shows cross section BB'. 別実施例である舶用防腐板について、縦断面ＡＡ´に相当する部分を示した断面図。Sectional drawing which showed the part corresponded to longitudinal cross-section AA 'about the marine antiseptic board which is another Example. 船体外板並びにビルジキール及び舵などの船体付加物表面に取り付けた舶用防腐板の縦断面ＡＡ´を示す断面図。Sectional drawing which shows longitudinal cross-section AA 'of the ship antiseptic board attached to ship hull appendages, such as a hull outer board, a bilge keel, and a rudder. 船体外板並びにビルジキール及び舵などの船体付加物表面より取り外す状態を示した舶用防腐板の縦断面ＡＡ´を示す断面図。Sectional drawing which shows the longitudinal cross-section AA 'of the ship antiseptic board which showed the state removed from ship hull appendices surfaces, such as a hull outer plate, a bilge keel, and a rudder.

９ 船体外板
１０ 舶用防食板 9 Hull outer plate 10 Marine protection plate

Claims (2)

喫水線以下の鋼製の船体及び船体付加物の表面に設けられ、船体及び船体付加物の材料である金属よりイオン化傾向の大きい金属で形成される舶用防腐板において、該舶用防腐板の表面は流線形であるとともに、前記舶用防腐板の表面に形成される取り付け部である凹部と、該凹部に嵌合し表面が前記舶用防腐板の表面の流線形にしたがう形状である蓋を備え、該蓋を貫通するネジ穴を備えたことを特徴とする舶用防腐板。 A marine preservative plate provided on the surface of a steel hull and hull appendage below the waterline and formed of a metal that has a higher ionization tendency than the metal that is the material of the hull and hull adjunct. with a linear, includes a recess which is fitted portion formed on the surface of the marine antiseptic plate, the lid is shaped to engage the surface fitting the recess follows the aerodynamic surface of the marine antiseptic plate, lid A marine antiseptic plate, comprising a screw hole penetrating through the vessel. 喫水線以下の鋼製の船体及び船体付加物の表面に設けられ、船体及び船体付加物の材料である金属よりイオン化傾向の大きい金属で形成される舶用防腐板において、長手方向に対し平行かつ船体設置面に対し直角であり、短手方向の少なくとも中央近傍の断面形状について、流体と接する側を流線形とし、船体設置面の輪郭形状を流線形とし、長手方向に対し直角かつ船体設置面に対し直角である断面形状を曲線形状とし、前記舶用防腐板の表面に形成される凹部と、前記凹部に嵌合し表面が流線形である蓋を備え、該蓋を貫通するネジ穴を備えたことを特徴とする舶用防腐板。   A marine preservative plate that is provided on the surface of steel hulls and hull appendages below the waterline and is made of a metal that has a higher ionization tendency than the metal that is the material of the hull and hull adjuncts. The cross-sectional shape at right angles to the surface and at least near the center of the cross section is streamlined on the side in contact with the fluid, and the contour shape of the hull installation surface is streamlined, perpendicular to the longitudinal direction and to the hull installation surface A cross-sectional shape that is a right angle is a curved shape, a recess formed on the surface of the marine preservative plate, a lid that fits into the recess and has a streamlined surface, and a screw hole that penetrates the lid A marine antiseptic board characterized by
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JPS51116598U (en) * 1975-03-18 1976-09-21
JPH076266U (en) * 1993-06-30 1995-01-27 住友軽金属工業株式会社 Galvanic anode unit for metal ships
JPH10147894A (en) * 1996-09-17 1998-06-02 Mitsubishi Materials Corp Method for mounting sacrificial anode and cap used for the same

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JPS51116598A (en) * 1975-04-07 1976-10-14 Sasebo Jukogyo Kk Building method for scaffold in ship

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51116598U (en) * 1975-03-18 1976-09-21
JPH076266U (en) * 1993-06-30 1995-01-27 住友軽金属工業株式会社 Galvanic anode unit for metal ships
JPH10147894A (en) * 1996-09-17 1998-06-02 Mitsubishi Materials Corp Method for mounting sacrificial anode and cap used for the same

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