JP3320801B2 - Bilge keel structure for small boats - Google Patents
Bilge keel structure for small boatsInfo
- Publication number
- JP3320801B2 JP3320801B2 JP31734892A JP31734892A JP3320801B2 JP 3320801 B2 JP3320801 B2 JP 3320801B2 JP 31734892 A JP31734892 A JP 31734892A JP 31734892 A JP31734892 A JP 31734892A JP 3320801 B2 JP3320801 B2 JP 3320801B2
- Authority
- JP
- Japan
- Prior art keywords
- hull
- ship
- chine
- keel
- keel member
- 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 - Fee Related
Links
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
- Tires In General (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は、小型船舶のビルジキ
ールの構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bilge keel structure for a small boat.
【0002】[0002]
【従来の技術】従来、大型船では船体の横揺れを防止す
るために、船底湾曲部に船体の長さ方向に延びる帯状の
板材を突出させてビルジキールを構成し、これによって
船体の横揺れに対する抵抗を増大させ、横揺れを抑制す
ることが行なわれている。また滑走艇等の小型船舶では
船底両側部は角形に形成されて、高速滑走時の水切りを
行なわせるようにしており、このチャインによってビル
ジキールとしての機能をある程度果たさせている。2. Description of the Related Art Conventionally, in a large ship, in order to prevent the ship from rolling, a bilge keel is formed by projecting a band-like plate material extending in the longitudinal direction of the ship from the curved bottom of the ship, thereby preventing the ship from rolling. The resistance is increased and the roll is suppressed. Also, in a small boat such as a planing boat, both sides of the bottom of the boat are formed in a rectangular shape so that drainage can be performed at the time of high-speed running, and the chine functions to some extent as a bilge keel.
【0003】[0003]
【発明が解決しようとする課題】上記滑走艇のような小
型船舶では、高速で走行するためにビルジキールを設け
るとそれが推進抵抗を増大させることになるという問題
があり、一方では小型船舶は風などの影響で大きな横揺
れが生じやすいという問題がある。In a small boat such as the planing boat described above, there is a problem that providing a bilge keel for traveling at a high speed increases the propulsion resistance. There is a problem that large roll is likely to occur due to the influence of the above.
【0004】この発明は、このような従来の欠点を解消
するためになされたものであり、高速航走時の推進抵抗
が増大せず、しかも横揺れを有効に抑制することができ
る小型船舶のビルジキールの構造を提供することを目的
とするものである。SUMMARY OF THE INVENTION The present invention has been made in order to solve such a conventional drawback, and there is provided a small marine vessel which does not increase the propulsion resistance during high-speed cruising and can effectively suppress the roll. It is intended to provide a bilge keel structure.
【0005】[0005]
【課題を解決するための手段】この発明は、船底板両側
部にチャイン部が形成され、このチャイン部は静止時お
よび低速時は喫水線下に位置し滑走時には喫水線上に浮
上する小型船舶において、上記チャイン部はほぼ水平に
形成されて、このチャイン部の下面に沿って、船尾付近
から少なくとも船体中央部付近まで連続して延びるキー
ル部材が配置され、このキール部材は、チャイン部の下
面の横幅全体に接するとともに、残りが側方へ水平方向
に突出されて、側方の突出量が0となる前端部でもチャ
イン部の下面の横幅全体に接しているものである。According to the present invention, there is provided a small ship in which a chine portion is formed on both sides of a bottom plate of a ship, and the chine portion is located below a draft line at rest and at a low speed and floats above the draft line at the time of gliding. The chine portion is formed substantially horizontally, and a keel member extending continuously from near the stern to at least near the center of the hull is arranged along the lower surface of the chine portion. The front end portion, which contacts the whole and the remaining portion is horizontally projected in the horizontal direction, and the side protrusion amount is zero, is also in contact with the entire lateral width of the lower surface of the chine portion.
【0006】上記キール部材は船体中央部付近より船首
側まで延び、その前端部付近が静止時および低速時にも
喫水線上に位置するように船体中央部付近から前側ほど
徐々に高い位置になるように湾曲して形成してもよい。The keel member extends from the vicinity of the center of the hull to the bow side, and is gradually raised from the vicinity of the center of the hull toward the front so that the vicinity of the front end is located on the waterline even at rest and at low speed. It may be curved.
【0007】[0007]
【作用】上記構成では、船体の静止時および低速航走時
にはキール部材が水中に位置するために、船体の横揺れ
に際しては水掻きとなって横揺れ抑制作用を果たし、高
速走行の状態ではキール部材は水面上に位置して滑走面
となり、安定した滑走状態を保持させることになる。ま
た、キール部材を水平方向に突出させているので、この
滑走状態を安定して保持できる。さらに、キール部材の
前端部付近を静止時および低速時にも喫水線上に位置す
るように、船体中央部付近から前側ほど徐々に高い位置
になるように湾曲して形成すると、この部分が動圧を発
生させて滑走状態にスムーズに移行させることができる
という利点がある。In the above construction, the keel member is located in the water when the hull is stationary or traveling at a low speed, so that when the hull rolls, it acts as a web to perform the roll suppression effect. Is located on the water surface and serves as a sliding surface, thereby maintaining a stable sliding state. Further, since the keel member is projected in the horizontal direction, the sliding state can be stably held. Furthermore, if the keel member is formed so as to be curved from the vicinity of the center of the hull to a position gradually higher toward the front side so as to be located on the waterline even at rest and at a low speed, this portion reduces dynamic pressure. There is an advantage that it can be generated and smoothly shifted to the sliding state.
【0008】[0008]
【実施例】図1〜図6おいて、FRPなどによって成形
された小型船舶の船体10は、船側板11と船底板12
との交差部にほぼ水平の部分が形成されてこの部分でチ
ャイン部13が形成され、このチャイン部13は船尾部
から船体中央部付近までは前後方向にほぼ水平に形成さ
れ、中央部付近から船首部に向かって徐々に高くなるよ
うに湾曲して形成されている。そしてこのチャイン部1
3に沿って、図2に示すような帯板状のキール部材20
が取付けられている。このキール部材20は、例えば船
体10と同一材質のFRPで形成すればよく、あるいは
ゴム板などの可撓性の材料で構成して、船体10の航走
中に物が衝突した場合でも弾性変形して破壊されないよ
うにしてもよい。1 to 6, a hull 10 of a small boat formed by FRP or the like has a ship side plate 11 and a ship bottom plate 12.
A substantially horizontal portion is formed at the intersection with the above, and a chine portion 13 is formed at this portion. The chine portion 13 is formed substantially horizontally in the front-rear direction from the stern to the vicinity of the center of the hull, and from the vicinity of the center. It is curved so as to gradually increase toward the bow. And this chine part 1
3, a band-shaped keel member 20 as shown in FIG.
Is installed. The keel member 20 may be formed of, for example, FRP of the same material as the hull 10, or may be formed of a flexible material such as a rubber plate so that the keel member 20 is elastically deformed even when an object collides while the hull 10 is running. May be prevented from being destroyed.
【0009】上記キール部材13は、図3〜図6に示す
ように、取付けられている。すなわち、キール部材20
はチャイン部13の下面に対して幅方向の半分程度が接
着され、残りの半分程度が側方に突出するように取付け
られ、その取付け範囲は船尾端から船体中央部と船首部
との中間部まで達し、船首側ほど側方突出量が小さくな
るようにしている。このキール部材20は静止時および
低速時は喫水線(水面)90下(例えば深さh=135
mm)に位置し、前端部が水面90上に位置するように
している。図面では船体10の片側のみの取付け状態を
示しているが、他方の側もこれと対称に形成されてい
る。The keel member 13 is mounted as shown in FIGS. That is, the keel member 20
Is mounted so that about half of the width direction is adhered to the lower surface of the chine portion 13 and the other half is protruded to the side, and the mounting range is from the stern end to an intermediate portion between the center of the hull and the bow. So that the amount of lateral protrusion becomes smaller toward the bow. The keel member 20 is below the waterline (water surface) 90 (for example, at a depth h = 135) at rest and at low speed.
mm), and the front end is positioned above the water surface 90. Although only one side of the hull 10 is shown in the drawing, the other side is also formed symmetrically.
【0010】上記キール部材20の寸法は、例えば全長
Lが7150mm、後端部から中央部(船体垂直分割線
4)までの範囲(長さL1=4080mm)の幅B1、
B4は220mm、それより前側は徐々に幅が狭くなっ
て垂直分割線4よりL2(=1020mm)だけ前側の
垂直分割線5の位置では幅B5は176mm、さらにそ
れよりL3(=1020mm)だけ前側の垂直分割線6
の位置では幅B6は123mm、さらにそれよりL4
(=1020mm)だけ前側の垂直分割線7の位置での
幅B7は40mmに設定されている。そしてこれをチャ
イン部13に取付けた状態では、垂直分割線4の位置で
の突出量C4は120mm、垂直分割線5の位置での突
出量C5は96mm、垂直分割線6の位置での突出量C
6は67mm、垂直分割線7の位置での突出量は0に設
定される。The dimensions of the keel member 20 include, for example, a total length L of 7150 mm, a width B1 in a range (length L1 = 4080 mm) from the rear end to the center (the hull vertical dividing line 4),
B4 is 220 mm, the width gradually becomes narrower on the front side, and the width B5 is 176 mm at the position of the vertical division line 5 that is L2 (= 1020 mm) ahead of the vertical division line 4 and further L3 (= 1020 mm) further forward. Vertical dividing line 6
Is 123 mm in width B6 and L4
The width B7 at the position of the vertical division line 7 on the front side by (= 1020 mm) is set to 40 mm. When this is attached to the chine portion 13, the protrusion amount C4 at the position of the vertical division line 4 is 120 mm, the protrusion amount C5 at the position of the vertical division line 5 is 96 mm, and the protrusion amount at the position of the vertical division line 6 C
6 is set to 67 mm, and the protrusion amount at the position of the vertical division line 7 is set to 0.
【0011】図7はキール部材20の取付け手段の別の
例を示し、船体のチャイン部13の船内側には補強板2
2が取付けられて目張り材23で固定され、このチャイ
ン部13および上記補強材22にビス24をねじ込むこ
とによりキール部材20を固定させている。FIG. 7 shows another example of the means for attaching the keel member 20. The reinforcing plate 2 is provided on the inner side of the chin portion 13 of the hull.
2, the keel member 20 is fixed by screwing a screw 24 into the chine portion 13 and the reinforcing member 22.
【0012】図8(a)(b)はキール部材のさらに別
の例を示し、(a)においては船体のチャイン部13の
船内側には上記同様に補強板22が取付けられて目張り
材23で固定され、その上側の船側板11の船内側には
補強板33が取付けられて目張り材32で固定され、こ
れらの補強部に対して水平部35の外側端が折り返され
て傾斜部36が形成されてなるキール部材30がそれぞ
れビス24,34によって固定されている。また(b)
においてはチャイン13の側面にビス41によって型材
40が固定され、この型材40の上部の溝43にキール
部材50の傾斜部36の端部を嵌入させるとともに、水
平部35の端部を型材40の下部の溝44に嵌入させる
ことによりキール部材50を取付けている。このキール
部材30および50のように板材を折り曲げて2個所で
固定させるようにすると、キール部材の取付け強度を増
加させることができる。FIGS. 8 (a) and 8 (b) show still another example of the keel member. In FIG. 8 (a), a reinforcing plate 22 is attached inside the chin portion 13 of the hull in the same manner as described above, and A reinforcing plate 33 is attached to the inner side of the ship side plate 11 on the upper side, and is fixed with a seaming material 32. The outer end of the horizontal portion 35 is folded back to these reinforcing portions, and an inclined portion 36 is formed. The formed keel member 30 is fixed by screws 24 and 34, respectively. (B)
In the above, the mold 40 is fixed to the side surface of the chine 13 by screws 41, and the end of the inclined portion 36 of the keel member 50 is fitted into the groove 43 on the upper side of the mold 40, and the end of the horizontal portion 35 is The keel member 50 is attached by being fitted into the lower groove 44. If the plate material is bent and fixed at two places like the keel members 30 and 50, the mounting strength of the keel member can be increased.
【0013】上記構成において、船体10の静止時およ
び低速時は上記キール部材20は喫水線90下に位置
し、前端部のみが喫水線90上に位置している。したが
って、船体10が横風を受けるなどして横揺れが生じた
場合には、船側に突出するキール部材20が水掻きの作
用を果たして横揺れを有効に抑制することになる。また
船体10が滑走状態になると船体10が浮上する結果、
キール部材20が喫水線90上に位置するようになる。
そしてこの場合にはキール部材20がチャイン部に位置
するために水切りの作用を果たし、しかも本来のチャイ
ン部13よりも幅が広いために、滑走面を広く形成して
滑走状態に達しやすく、かつ安定して保持することにな
る。In the above configuration, the keel member 20 is located below the waterline 90 when the hull 10 is stationary and at a low speed, and only the front end is located above the waterline 90. Therefore, when the hull 10 rolls due to a side wind or the like, the keel member 20 protruding toward the ship performs the function of webbing to effectively suppress the roll. Also, when the hull 10 is in a sliding state, the hull 10 comes up,
The keel member 20 is located on the waterline 90.
In this case, since the keel member 20 is located at the chine portion, it functions as a drainer, and since it is wider than the original chine portion 13, it is easy to reach the sliding state by forming a wide sliding surface, and It will be kept stable.
【0014】なお、キール部材20は船尾端から少なく
とも船体中央部付近まで連続して形成しておけばよい
が、それより前側にも図1に示すように中央部付近から
船首部に向かって徐々に高くなるように湾曲して形成し
た場合には、この部分が動圧を発生させて滑走状態にス
ムーズに移行させることができるという利点がある。The keel member 20 may be formed continuously from the stern end to at least the vicinity of the center of the hull. However, as shown in FIG. In the case where the portion is curved so as to be high, there is an advantage that this portion can generate a dynamic pressure and smoothly transition to a sliding state.
【0015】[0015]
【発明の効果】以上説明したように、この発明によれ
ば、船体の静止時および低速航走時にはキール部材が水
中に位置するために、船体の横揺れに際しては水掻きと
なって横揺れ抑制作用を果たし、高速走行の状態ではキ
ール部材は水面上に位置して滑走面となり、安定した滑
走状態を保持させることになる。また、キール部材を水
平方向に突出させているので、この滑走状態を安定して
保持できる。さらに、キール部材の前端部付近を静止時
および低速時にも喫水線上に位置するように、船体中央
部付近から前側ほど徐々に高い位置になるように湾曲し
て形成すると、この部分が動圧を発生させて滑走状態に
スムーズに移行させることができるという利点がある。As described above, according to the present invention, when the hull is at rest and at low speed, the keel member is located in the water. In a high-speed running state, the keel member is located on the water surface and serves as a sliding surface, thereby maintaining a stable sliding state. Further, since the keel member is projected in the horizontal direction, the sliding state can be stably held. Furthermore, if the keel member is formed so as to be curved from the vicinity of the center of the hull to a position gradually higher toward the front side so as to be located on the waterline even at rest and at a low speed, this portion reduces dynamic pressure. There is an advantage that it can be generated and smoothly shifted to the sliding state.
【図1】この発明の実施例を示す船体の側面図である。FIG. 1 is a side view of a hull showing an embodiment of the present invention.
【図2】キール部材の斜視図である。FIG. 2 is a perspective view of a keel member.
【図3】船体垂直分割線4での部分断面図である。FIG. 3 is a partial sectional view taken along a hull vertical dividing line 4;
【図4】船体垂直分割線5での部分断面図である。FIG. 4 is a partial sectional view taken along a hull vertical dividing line 5;
【図5】船体垂直分割線6での部分断面図である。FIG. 5 is a partial sectional view taken along a hull vertical dividing line 6;
【図6】船体垂直分割線7での部分断面図である。FIG. 6 is a partial sectional view taken along a hull vertical dividing line 7;
【図7】キール部材の取付け部の別の例を示す部分断面
図である。FIG. 7 is a partial cross-sectional view showing another example of a mounting portion of the keel member.
【図8】キール部材およびその取付け部のさらに別の例
を示す部分断面図である。FIG. 8 is a partial cross-sectional view showing still another example of a keel member and its mounting portion.
10 船体 11 船側板 12 船底板 13 チャイン部 20 キール部材 90 喫水線 DESCRIPTION OF SYMBOLS 10 Hull 11 Ship side plate 12 Ship bottom plate 13 Chine part 20 Keel member 90 Waterline
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭50−127377(JP,A) 特開 昭50−55088(JP,A) 実開 昭63−142297(JP,U) 実開 昭63−142294(JP,U) 実開 昭57−86898(JP,U) (58)調査した分野(Int.Cl.7,DB名) B63B 3/00 B63B 3/44 B63B 1/18 B63B 1/32 B63B 35/73 B63B 41/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-127377 (JP, A) JP-A-50-55088 (JP, A) Fully open 1988-142297 (JP, U) Really open 1988 142294 (JP, U) Shokai 57-86898 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) B63B 3/00 B63B 3/44 B63B 1/18 B63B 1/32 B63B 35/73 B63B 41/00
Claims (2)
このチャイン部は静止時および低速時は喫水線下に位置
し滑走時には喫水線上に浮上する小型船舶において、上記チャイン部はほぼ水平に形成されて、このチャイン
部の下面に沿って、船尾付近から少なくとも船体中央部
付近まで連続して延びるキール部材が配置され、このキ
ール部材は、チャイン部の下面の横幅全体に接するとと
もに、残りが側方へ水平方向に突出されて、側方の突出
量が0となる前端部でもチャイン部の下面の横幅全体に
接している ことを特徴とする小型船舶のビルジキールの
構造。1. A chine portion is formed on both sides of a bottom plate of a ship,
The chine portion is located substantially below the waterline at rest and at low speed, and floats above the waterline at the time of gliding.
Along the underside of the section, from near the stern to at least the center of the hull
A keel member that extends continuously to the vicinity is arranged.
The roll member contacts the entire width of the lower surface of the chine section.
The rest is projected horizontally to the side, and the side projection
Even at the front end where the amount becomes 0, it covers the entire width of the lower surface of the chine part.
A bilge keel structure for a small ship, which is in contact with the ship.
首側まで延び、その前端部付近が静止時および低速時に
も喫水線上に位置するように船体中央部付近から前側ほ
ど徐々に高い位置になるように湾曲して形成されている
ことを特徴とする請求項1記載の小型船舶のビルジキー
ルの構造。 2. The ship according to claim 1, wherein the keel member is located near the center of the hull.
Extends to the neck, near its front end at rest and at low speeds
Near the center of the hull so as to be located on the waterline.
It is curved so that it gradually becomes higher
Structure of bilge keel of a small watercraft according to claim 1, wherein a.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31734892A JP3320801B2 (en) | 1992-11-26 | 1992-11-26 | Bilge keel structure for small boats |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31734892A JP3320801B2 (en) | 1992-11-26 | 1992-11-26 | Bilge keel structure for small boats |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06156363A JPH06156363A (en) | 1994-06-03 |
JP3320801B2 true JP3320801B2 (en) | 2002-09-03 |
Family
ID=18087228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31734892A Expired - Fee Related JP3320801B2 (en) | 1992-11-26 | 1992-11-26 | Bilge keel structure for small boats |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3320801B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107600306A (en) * | 2017-09-11 | 2018-01-19 | 嘉兴市锦佳船舶制造有限公司 | A kind of high speed ferry troops ship |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2757032A1 (en) * | 2013-01-18 | 2014-07-23 | Technische Universiteit Delft | Fast Ship |
CN114954776B (en) * | 2022-04-28 | 2023-11-17 | 大连船舶重工集团有限公司 | Bilge keels suitable for FPSO |
-
1992
- 1992-11-26 JP JP31734892A patent/JP3320801B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107600306A (en) * | 2017-09-11 | 2018-01-19 | 嘉兴市锦佳船舶制造有限公司 | A kind of high speed ferry troops ship |
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JPH06156363A (en) | 1994-06-03 |
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