JPS628891A - Baby boat for fishing boat - Google Patents

Baby boat for fishing boat

Info

Publication number
JPS628891A
JPS628891A JP14850585A JP14850585A JPS628891A JP S628891 A JPS628891 A JP S628891A JP 14850585 A JP14850585 A JP 14850585A JP 14850585 A JP14850585 A JP 14850585A JP S628891 A JPS628891 A JP S628891A
Authority
JP
Japan
Prior art keywords
boat
recco
fishing
stern
ship
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.)
Pending
Application number
JP14850585A
Other languages
Japanese (ja)
Inventor
Masahiro Tamashima
正裕 玉島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NISHI NIPPON RIYUUTAI GIKEN KK
Original Assignee
NISHI NIPPON RIYUUTAI GIKEN KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NISHI NIPPON RIYUUTAI GIKEN KK filed Critical NISHI NIPPON RIYUUTAI GIKEN KK
Priority to JP14850585A priority Critical patent/JPS628891A/en
Publication of JPS628891A publication Critical patent/JPS628891A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To aim at enhancing the propelling performance of a fishing boat in its entirety, by forming a wedge section which is formed with a dynamic lift generating surface having a longitudinal length shorter than the overall length of the baby boat and inclined downward from the front to the rear thereof, on the bottom surface of the stern rear end section of the baby boat over the overall width thereof. CONSTITUTION:In such a condition that a baby boat B is coupled to a mother boat A, when the mother boat A cruises at a normal speed while towing the baby boat B which thereby receives water stream, as indicated by the arrow (y), on a dynamic lift generating surface of a wedge section provided in the bottom surface of the stern rear end section (ba) of the boat B over the overall width thereof, at the front thereof in accordance with the speed of the mother boat. Therefor, the submerged outer surface area of the boat B may be made to be less and the influence of back wash from a propeller Ap of the mother boat A may be eliminated so that the viscous friction resistance of the boat B is remarkably reduced. Further, the wave making resistance of not only the baby boat but also the mother boat is decreased so that the propelling performance of the fish boat may be enhanced in its entirety.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、漁船用レッコボート、詳しくは、港と漁場と
の間において、その船首部の前端部の底面を親船の船尾
部の後端部にもたせかけた姿勢にて該親船に連結された
状態で、該親船に曳航されるレッコボートに関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a recco boat for fishing boats, and more specifically, to a recco boat for fishing boats, in particular, between a port and a fishing ground, the bottom surface of the front end of the bow section is connected to the rear end of the stern section of the parent boat. This invention relates to a recco boat that is towed by the parent ship while being connected to the parent ship in a leaning position.

〔従来の技術〕[Conventional technology]

例えば旋網漁法などでは、一般に、漁場と港との間を航
行する旋網漁船本船(親船)に加えて・漁場において網
を張設するため等に用いられるレッコボートと称される
補助的な小舟が必要である・そこで、従来から、旋M4
漁船が漁場と港との間を航行する場合には、第6図に示
すように、親船Aの船尾部AaO後端部aaにレッコボ
ートBの船首部Bfの前端部bfの底面をもたせかけた
姿勢にてそのレッコボートBをローブCなどで親船Aに
連結することにより、レッコボートBを曳航して運搬す
るようにしている。そのような手段を用いることの主た
る理由は、かかる旋W4tII&船などの漁労用の船で
は、親船Aの方に、レッコボートBを積載したり或いは
そのための積み卸し用装備を設置するための余裕スペー
スをとれないことが。
For example, in purse seine fishing, in addition to the main vessel (main vessel) of the purse seine fishing boat that navigates between the fishing grounds and the port, an auxiliary small boat called a recco boat is used to set the net at the fishing grounds. It is necessary. Therefore, from the past, turning M4
When a fishing boat sails between a fishing ground and a port, as shown in Fig. 6, the bottom surface of the front end bf of the bow part Bf of Recco boat B is placed against the rear end aa of the stern part AaO of parent ship A. By connecting the Recco boat B to the parent ship A with a robe C or the like in the same posture, the Recco boat B is towed and transported. The main reason for using such a method is that in a fishing vessel such as the W4tII boat, there is sufficient space on the parent vessel A to load Recco boat B or to install equipment for loading and unloading it. Not being able to take up space.

多いためである。ちなみに、船長(垂線間長)が31m
、排水量が満載状態で340トン程度の親。
This is because there are many. By the way, the captain (length between perpendiculars) is 31m.
, with a displacement of approximately 340 tons when fully loaded.

船Aに対しては、船長(垂線間長)が9m、排水量が1
5トン程度のレッコボートBが用いられるのが普通であ
る。
For ship A, the captain (length between perpendiculars) is 9 m and the displacement is 1.
Usually, a Recco boat B of about 5 tons is used.

また、そのレッコボートBの船壁は、現在のところ、第
7図(イ)の側面図および第7図(ロ)の概略ボディプ
ランに示しているように、船首部Bfおよび船尾部Ba
の各船底がなめらかに切り上がり、かつ、船首部Bfに
おいて、船首端から左右両舷に亘ってなめらかに船幅が
増大すると共に船底から上方に亘ってなめらかに船幅が
増大する、という船首バルブなどの付加物が掻く少ない
比較的単純な形状に構成されているのが普通である。
In addition, the hull walls of Recco Boat B are currently divided into a bow section Bf and a stern section Ba, as shown in the side view in Figure 7 (a) and the schematic body plan in Figure 7 (b).
A bow valve in which each bottom of the ship is smoothly cut up, and at the bow part Bf, the ship width increases smoothly from the bow end to both port and starboard sides, and the ship width increases smoothly from the bottom to the top. It is usually constructed in a relatively simple shape with few additions such as.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら、上記のように親船Aの船尾端にレソコボ
ー)Bを連結して曳航運搬するとなれば、当然に、本船
たる親船AにはそのレッコボートBの曳航に起因する抵
抗増加が作用して船速の低下を来たすことは明らかであ
る。ちなみに、先に例として挙げた親船Aとレッコボー
トBとの組み合わせについて実験したところ、親船Aの
みの最大定格出力(MCR)における船速(満載状態)
が14.49ノツトであるのに対して、その親船Aにし
、コボートBを連結して曳航させた場合には、同MCH
における船速か13.57ノツトとなり、結局、レッコ
ボートBの曳航に起因して6.3%もの大きな船速低下
が生じていることが判った。
However, if the resoko boat (B) is connected to the stern end of the parent ship A and towed and transported as described above, the main ship, the parent ship A, will naturally experience increased resistance due to the towing of the resoko boat B. It is clear that this will cause a decrease in ship speed. By the way, when we experimented with the combination of parent ship A and Recco boat B mentioned earlier as an example, we found that the ship speed (fully loaded state) at the maximum rated output (MCR) of parent ship A only.
is 14.49 knots, whereas if parent ship A is towed with co-boat B connected, the MCH is 14.49 knots.
The ship's speed was 13.57 knots, and it was found that the towing of Recco Boat B had caused a significant decrease in ship speed of 6.3%.

その大きな船速低下の原因としては、レフツボ−18分
の重量の増加および粘性摩擦抵抗の増加は言うまでも無
く、レッコボートBによる造波抵抗増加がかなり大きく
寄与しているであろうことが、前記第6図に模式的に示
しているように、レソコボートBからその後方へ非常に
大きな波Wが流出しているのが目視観察されることから
想像に難く無い。なお、従来は、親船Aによるレッコボ
ートBの曳航時には、レッコボートBのプロペラBpの
回転を許容していなかった点を念のため付記しておく。
As for the cause of this large drop in boat speed, it goes without saying that the weight of the left boat 18 and the increase in viscous frictional resistance are due to the increase in wave-making resistance caused by Recco Boat B. As schematically shown in FIG. 6, it is not difficult to imagine that a very large wave W is visually observed flowing out from the resoco boat B to the rear thereof. It should be noted that conventionally, when the parent ship A tows the Recco boat B, rotation of the propeller Bp of the Recco boat B is not allowed.

また、同第6図中のBrは舵を示している。Further, Br in FIG. 6 indicates a rudder.

一方、漁船にとっては船速か命とさえ言われるほど重要
である。即ち、黒情報をキャッチしてから他船に先がけ
て漁場へ如何に速(到達するかが漁獲量の良否を決する
。従って、従来から漁船の間型開発は他種の船舶の場合
以上の真剣さをもうて推進され、多大な成果が挙げられ
て来た。ところが、これまでの間型開発の成果が極めて
大きかったからこそ、その反動として、最近に至つてか
らはその間型開発による推進性能の向上(船速増加)の
余地は非常に小さくなってきた。つまり、最近の船壁は
、造波抵抗などのように殆ど未知で且つ早急には完全解
明されそうもない分野による影響を除外すれば、殆ど理
想の船壁に非常に近すいたものになっており、従って、
たとえ相当の費用と時間をかけた大規模な研究を行って
も、精々1〜2%、ともすれば誤差の範囲とも言うべき
小さな推進性能の改良しか得られない、というのが現状
になってきている。
On the other hand, for fishing boats, speed is so important that it can even be said to be life-threatening. In other words, the quality of the catch is determined by how quickly the vessels reach the fishing grounds before other vessels after catching black information.Therefore, the development of fishing vessel configurations has traditionally been more serious than for other types of vessels. However, precisely because the results of the development of the intermediate type have been so great to date, as a reaction to this, there has been a recent push to improve the propulsion performance by developing the intermediate type. The room for improvement (increase in ship speed) has become very small.In other words, modern ship walls have to be designed to eliminate the influence of areas such as wave resistance, which are largely unknown and unlikely to be fully understood any time soon. In most cases, the walls are very close to the ideal ship wall, and therefore,
The current situation is that even if we conduct large-scale research that requires a considerable amount of money and time, we will only be able to obtain a small improvement in propulsion performance of 1 to 2% at most, which can be said to be within the margin of error. ing.

かかる実情に鑑みるとき、前述したレッコボートBの曳
航に起因する6゜3%の船速低下というのはいかにも大
きく、従って、このレンコボートBの曳航による抵抗増
加を減少させ得る手段を模索することは、漁船の大幅な
船速向上を達成せんとする上で、現在残されている希有
の有効な手法ではないかと思料した。
Considering these circumstances, the 6.3% reduction in ship speed due to the towing of the Recco Boat B mentioned above is quite significant, and therefore, it is necessary to find a means to reduce the increase in resistance due to the towing of the Recco Boat B. I believe that this is one of the few remaining effective methods in attempting to significantly increase the speed of fishing boats.

本発明は、上記実情に鑑みて鋭意研究の結果なされたも
のであって、その目的は、漁船用レッコボートの船体に
極く簡素な形状改良を施すのみでありながら、そのレッ
コボートとそれに対する親船との組み合わせとしての漁
船全体の推進性能の向上(船速増加)を図ることにある
The present invention was made as a result of intensive research in view of the above-mentioned circumstances, and its purpose is to improve the hull of a recco boat for fishing boats in a very simple manner, and to improve the recco boat and its parent boat. The aim is to improve the propulsion performance (increase in ship speed) of the fishing boat as a whole in combination with the following.

c問題点を解決するための手段〕 上記目的を達成するために、本発明は、第1図(イ)の
全体側面図および第1図(ロ)のレッコボートの後面図
に略示するように、港と漁場との間において、その船首
部Bfの前端部brの底面を親船Aの船尾部Aaの後端
部aaにもたせかけた姿勢にて該親船Aに連結された状
態で、該親船Aに曳航される漁船用レンコボートBにお
いて、その船尾部Baの後端部baにおける底面のほぼ
全船幅に亘って、その全船長しに比べて前後長さEが極
く短5くて且つ前方(船首側)から後方(船尾側)に向
かって下方に傾斜する揚力発生面1aを備えたウェッジ
部1を形成してある、という点に特徴がある。
Means for Solving Problem c] In order to achieve the above object, the present invention has the following features as schematically illustrated in the overall side view of FIG. , connected to the parent ship A between the port and the fishing ground with the bottom surface of the front end br of the bow part Bf leaning against the rear end aa of the stern part Aa of the parent ship A, In the fishing boat B towed by the parent ship A, the longitudinal length E is extremely short over almost the entire width of the bottom surface at the rear end ba of the stern part Ba compared to the entire length of the boat. The ship is characterized by the fact that the wedge part 1 is formed with a lift generating surface 1a that is 5-shaped and slopes downward from the front (bow side) to the rear (stern side).

〔作用〕[Effect]

かかる特徴構成故に発揮される作用は次の通りである。 The effects achieved due to this characteristic configuration are as follows.

即ち、第1図(ハ)に示しているように、親船へにレッ
コボートBを連結した状態において、親船Aおよびレソ
コボートBが停船している場合には、レッコボートBは
ほぼその排水量に見合った静止釣り合い状態(図中点線
で示す)で浮いているが、図中矢印Xで示すように漁船
本船としての親船Aが通常船速く漁船の場合は、フルー
ド数が0.3〜0.4と非常に高速である)で航行して
レッコボートBが曳航されている場合には、レソコボー
トBは、その船尾後端部baの底面のほぼ全船幅に亘っ
て形成されたウェッジ部1の揚力発生面1aが図中矢印
yで示すように前記船速に応じた前方からの流水を受け
て揚力を発生するため、図中実線で示すように上方に浮
き上がった滑走状態に近い状態となる。つまり、前記ウ
ェッジ部1が比較的小規模のものであるにも拘わらず、
前記親船Aの船速か非常に高速であるため、レソコボー
トmにはその揚力発生面1aにおいて発生する極めて大
きな揚力が作用するのである。そして、このように親船
Aの航行時にはレッコボートBが滑走状態に近い状態で
曳航されることになるので、レソコボートBの浸水表面
積が非常に小さくなると共に、親船へのプロペラApの
後流の影響を受けなくなるため、そのレッコボートBの
粘性摩擦抵抗は極端に減少する。
In other words, as shown in Figure 1 (C), when Recco Boat B is connected to the parent vessel and Parent Vessel A and Recco Boat B are at rest, Recco Boat B has a displacement approximately equal to its displacement. However, as shown by the arrow X in the figure, if the main fishing boat A is a normal fishing boat, the Froude number is between 0.3 and 0. When Recco Boat B is being towed by sailing at a very high speed (4), the Recco Boat B will be sailing at a very high speed of Since the lift generating surface 1a generates lift by receiving flowing water from the front according to the speed of the ship as shown by the arrow y in the figure, a state similar to a planing state in which the ship floats upward is created as shown by the solid line in the figure. . In other words, even though the wedge portion 1 is relatively small-scale,
Since the speed of the parent ship A is very high, an extremely large lift force generated on the lift force generating surface 1a acts on the resoco boat m. In this way, when the parent ship A is sailing, the Recco Boat B is towed in a nearly planing state, so the flooded surface area of the Recco Boat B becomes extremely small, and the wake of the propeller Ap towards the parent vessel is reduced. Since it is no longer affected, the viscous frictional resistance of Recco Boat B is extremely reduced.

また、目視観察により確認したところ、親船Aによるレ
ッコボートBの曳航時におけるレッコボートBからの後
方への流出波Wは、零発B目のようなウェッジ部1を有
しない従来開型のものに比べてかなり小さくなっており
、従って、レッコボートBによる造波抵抗も大幅に減少
していることが明らかである。しかも、詳細な計測およ
び解析を行った結果によれば、レッコボートBが滑走状
態に近い曳航状態になることによって、レッコボートB
自体の造波抵抗が減少するのみならず、親船Aの造波抵
抗をも減少させるという意外に大きな干渉効果が発揮さ
れる。このことは、後述する実施例における説明から一
層明らかになろう。
Furthermore, as confirmed by visual observation, when Recco Boat B is towed by parent ship A, the outflow wave W flowing backwards from Recco Boat B is similar to that of the conventional open type boat that does not have the wedge part 1 like the zero launcher B. Therefore, it is clear that the wave-making resistance by Recco Boat B has also been significantly reduced. Moreover, according to the results of detailed measurements and analysis, when Recco Boat B enters a towed state close to a planing state, Recco Boat B
A surprisingly large interference effect is exhibited in that not only the wave-making resistance of itself is reduced, but also the wave-making resistance of parent ship A is reduced. This will become clearer from the description of the examples below.

なお、前記揚力発生面1aを備えたウェッジ部1は、上
記したように、その前後長さlがレッコボートBの全船
長りに比べて掻く短い小規模なものでよいから、それを
設けたことによってレッコボートBの重量や排水量や浸
水面積を太き(変化させることも無いし、また、その製
造コストを上昇させる要因にもならないことは言うまで
も無い。
Note that, as described above, the wedge portion 1 provided with the lift generating surface 1a may be a small-scale one whose longitudinal length l is shorter than the total length of the Recco boat B. It goes without saying that this will not increase (or change) the weight, displacement, or flooded area of Recco Boat B, nor will it be a factor in increasing its manufacturing cost.

〔実施例〕〔Example〕

以下、本発明による漁船用レッコボートの具体的実施例
を図面(第2図ないし第5図)に基いて説明する。
Hereinafter, specific embodiments of the recco boat for fishing boats according to the present invention will be described based on the drawings (FIGS. 2 to 5).

第2図(イ)、(ロ)は、本発明を適用した漁船用レッ
コボートBの船尾部Baの拡大側面図および全体ボディ
プラン図を示しており、図示するように、その船尾部B
aO後端部ba、つまり、船尾トランザムTの最後端部
における底面のほぼ全船幅に亘って、そのレッコボート
船体の全船長しく図示せず:例えば垂線間長L PP)
に比べて前後長さlが極く短くて且つ前方(船首側)か
ら後方(船尾側)に向かって下方に傾斜する揚力発生面
1aを備えたウェッジ部lを形成すべく、ウェッジ部材
IAを例えば溶接等により固定的に設けである。
FIGS. 2(a) and 2(b) show an enlarged side view and an overall body plan diagram of the stern part Ba of the recco boat B for fishing boats to which the present invention is applied, and as shown in the figure, the stern part B
aO aft end ba, that is, over almost the entire width of the bottom surface at the rearmost end of the stern transom T, the entire length of the Recco boat hull is not shown (for example, perpendicular length L PP)
In order to form a wedge part l having a very short longitudinal length l compared to the above and having a lift generating surface 1a that slopes downward from the front (bow side) to the rear (stern side), the wedge member IA is For example, it is fixedly provided by welding or the like.

なお、前記ウェッジ部1を形成するウェッジ部材IAの
前後長さlは、全船長しの3〜10%に設定するのが適
当であり、この例では約4%に設定されている。また、
前記揚力発生面1aの水平面WSに対する角度αは、親
船A(図示せず)が静止しているときの静止連結浮き状
態において3〜6度になるように設定するのが適当であ
り、この例では約4度になるように設定されている。
Note that the longitudinal length l of the wedge member IA forming the wedge portion 1 is appropriately set to 3 to 10% of the total length, and in this example, it is set to about 4%. Also,
It is appropriate that the angle α of the lift generating surface 1a with respect to the horizontal plane WS is set to be 3 to 6 degrees in a stationary connected floating state when the parent ship A (not shown) is stationary. In the example, it is set to approximately 4 degrees.

また、前記船尾トランザムTの底面Toは、そのプロペ
ラBpの上方に相当する中央部分において上方に凹んだ
アーチ型に形成されている。
Further, the bottom surface To of the stern transom T is formed in an arch shape concave upward in the central portion corresponding to the upper side of the propeller Bp.

図中、2はスケグ兼プロペラガーダ−を示し、また、こ
の図では舵の記載は省略されている。
In the figure, 2 indicates a skeg/propeller girder, and the rudder is omitted in this figure.

次に、第3図および第4図を参照しながら、上記した本
発明に係るウェッジ部1を備えた漁船用レンフボート(
以下、実施例レンフと称する)および前記第7図(イ)
、(ロ)に示したウェッジ部を有しない従来の漁船用レ
ンフボート(以下、従来レンフと称する)についての比
較実験を行った結果について説明する。
Next, referring to FIGS. 3 and 4, a fishing boat fishing boat equipped with the wedge portion 1 according to the present invention described above (
Hereinafter referred to as Example Renf) and the above-mentioned FIG. 7 (A)
, (b) The results of a comparative experiment on a conventional fishing boat (hereinafter referred to as "conventional Renf") without the wedge portion shown in (b) will be explained.

即ち、親船(これは実施例レンフおよび従来レンフに対
して共通)のみの場合、親船と従来レンフとを組み合わ
せた場合(Cond (0))、親船と実施例レンフに
おけるウェッジ部1を除去したものとを組み合わせた場
合(Cond (1))。
In other words, in the case of only the parent ship (this is common to the example REF and the conventional RENF), when the parent ship and the conventional REF are combined (Cond (0)), the wedge part 1 of the parent ship and the example REF is When the removed items are combined (Cond (1)).

親船と実施例レンフ(ウェッジ部1有)とを組み合わせ
、かつ、その実施例レンフのプロペラの遊転を禁止(固
定)した場合(Cond (2))。
A case in which the parent ship and the embodiment renf (with one wedge part) are combined, and free rotation of the propeller of the embodiment renf is prohibited (fixed) (Cond (2)).

親船と実施例レンフ(ウェッジ部1有)とを組み合わせ
、かつ、その実施例レンフのプロペラの遊転を許容した
場合(Cond (3))、の5状態について、夫々、
流力試験用回流水槽において縮小模型を用いた抵抗推進
試験を行った上で、所定の手順に従って各状態での船速
−BHP特性を推定した結果、第3図に示すように、従
来技術の範囲(ウェッジ部無し)に属する(Cond 
 (0))および(Cond (1))の場合には、親
船のみの場合に比べて大幅にCMCRMCR時平均%)
推進性能が低下しているのに対して、本発明の技術範囲
(ウェッジ部1有り)に属する(Cond(2)〕およ
び(Cond (3))の場合には、親船のみの場合に
比べた推進性能の低下は、MCR時平均で約3%と非常
に小さくなっていることが明らかである。
For each of the following five conditions, when the parent ship and the example refrigerant (with one wedge part) are combined, and the propeller of the example refrigerant is allowed to rotate freely (Cond (3)),
After carrying out a resistance propulsion test using a scaled model in a circulating water tank for hydrodynamic testing, we estimated the ship speed-BHP characteristics in each state according to the prescribed procedure, and as shown in Figure 3, we found that the conventional technology (Cond) belonging to the range (no wedge part)
(0)) and (Cond (1)), the average CMCRMCR time%) was significantly higher than in the case of parent ship only.
Although the propulsion performance is lower, in the cases of (Cond (2)) and (Cond (3)) that belong to the technical scope of the present invention (with wedge part 1), compared to the case of only the parent ship. It is clear that the decrease in propulsion performance during MCR is very small, at about 3% on average.

なお、(Cond (0))と(Cond (1))の
結果を比較することにより、上記実施例レンフにおいて
船尾トランザムTの底面TOを上方に凹んだアーチ型に
形成したことが、若干の推進性能の向上をもたらしてい
ることが判り、更にまた、(Cond (2))と(C
ond (3))の結果を比較することにより、レンフ
プロペラを固定するよりも遊転させた方が若干の推進性
能の向上をもたらしていることが判る。
In addition, by comparing the results of (Cond (0)) and (Cond (1)), it was found that forming the bottom surface TO of the stern transom T in the above-mentioned example Renf in an upwardly concave arch shape caused a slight propulsion. It was found that the performance improved, and furthermore, (Cond (2)) and (C
By comparing the results of ond (3)), it can be seen that allowing the Renf propeller to freely rotate rather than fixing it brings about a slight improvement in the propulsion performance.

ところで、前記本発明の技術範囲(ウェッジ部1有り)
に属する(Cond (2))および〔Cand(3)
)の場合において、親船のみの場合に比べた推進性能の
低下が非常に小さくなっている要因としては、レンフボ
ートが親船により通常船速(ただし、漁船であるからフ
ルード数にして0.3〜0.4とかなり高速である)で
曳航されている際に、そのレンフボートが前記ウェッジ
部1の揚力発生面1aにおいて前記船速に応じた前方か
らの流水を受けて相当大きな揚力を発生するために滑走
状態に近い状態となることから、レンフボートの浸水表
面積が非常に小さくなると共に親船のプロペラの後流の
影響を受けなくなって、そのレンフボートの粘性摩擦抵
抗が極端に減少すること、ならびに、その曳航時におい
てレンフボートからの後方への流出波Wが、本発明のよ
うなウェッジ部1を有しない従来開型のものに比べて極
めて小さくなっていることから、レンフボート自体の造
波抵抗も大幅に減少していること、等が目視観察結果か
ら容易に推定できるところであるが、計測結果を詳細に
解析した結果、次のような興味ある要因も併せて指摘で
きる。
By the way, the technical scope of the present invention (with wedge part 1)
(Cond (2)) and [Cand (3)
), the reason why the drop in propulsion performance is so small compared to when only the parent ship is used is that the reff boat is operated at a normal ship speed by the parent ship (however, since it is a fishing boat, the Froude number is 0.3 When being towed at a speed of ~0.4 (which is a fairly high speed), the renf boat receives flowing water from the front according to the ship speed on the lift generating surface 1a of the wedge portion 1, and generates a considerably large lift. As a result, the submerged surface area of the Renf boat becomes very small, and it is no longer affected by the wake of the parent ship's propeller, and the viscous frictional resistance of the Renf boat is extremely reduced. During towing, the outflow wave W from the remph boat to the rear is extremely small compared to the conventional open type that does not have the wedge part 1 like the present invention, so the wave-making resistance of the remf boat itself also increases. Although it can be easily estimated from the visual observation results that there is a significant decrease, the following interesting factors can also be pointed out as a result of detailed analysis of the measurement results.

即ち、第4図は、前記各状態夫々における造波抵抗係数
γユを算出した結果を示すグラフであるが、これを見る
と、前記本発明の技術範囲(ウェッジ部1有り)に属す
る(Cond (2))およびCCand (3))の
場合における造波抵抗係数γ、は、親船のみの場合にお
ける造波抵抗係数γ1よりもかなり小さくなっており、
このことから、レンコボートが滑走状態に近い曳航状態
になることによって、レンコボート自体の造波抵抗が減
少するのみならず、親船から後方へ流出する船尾波を打
ち消してその親船による造波抵抗をも減少させるという
意外に大きな干渉効果が発揮されているのである。
That is, FIG. 4 is a graph showing the results of calculating the wave resistance coefficient γ in each of the above-mentioned states. The wave resistance coefficient γ in the cases of (2)) and CCand (3)) is considerably smaller than the wave resistance coefficient γ1 in the case of only the parent ship,
From this, by putting the Renco boat in a towed state that is close to a planing state, it not only reduces the wave-making resistance of the Renco boat itself, but also cancels out the stern waves flowing backward from the parent boat, and the wave-making by the parent boat. This has a surprisingly large interference effect that also reduces resistance.

第5図は別の実施例を示し、上記した実施例においては
前記ウェッジ部1を形成するウェッジ部材IAを船尾ト
ランザムTの最後端部における底面に溶接等により固定
的に設けであるのに対し、この別実施例においては、そ
のウェッジ部1を形成するに、前記の如き揚力発生面1
aを備えたウェッジ部材IAを、レンコボート船体の船
尾トランザムの最後端部に対して着脱自在に、または、
作用状態と非作用状態とに姿勢変更自在に取り付けたも
のである。
FIG. 5 shows another embodiment, whereas in the embodiment described above, the wedge member IA forming the wedge portion 1 is fixedly provided on the bottom surface of the rearmost end of the stern transom T by welding or the like. , in this other embodiment, the wedge portion 1 is formed by the lift generating surface 1 as described above.
The wedge member IA equipped with a is detachably attached to the rearmost end of the stern transom of the Lenco boat hull, or
It is attached so that its posture can be freely changed between an active state and a non-active state.

即ち、同第5図中矢印2で示す方向に前記ウェッジ部材
IAを適宜移動させることにより、そのウェッジ部材I
AをレンコボートBの船尾端baの後板ba’ に引っ
掛けた図中実線で示す作用状態に装着したり、そのウェ
ッジ部材LAをレンコボートBの船尾端baから完全に
取り外したり、あるいは、そのウェッジ部材IAを図中
点線で示す非作用状態に引き上げて固定できるように構
成されている。なお、図中3は、前記ウェッジ部材IA
に対するガイド兼押さえ部材であって、前記船尾端ba
の後板ba″の下部外面に固着された平面視略U字型部
材で構成されている。かかる構成によれば、従来の既存
の漁船用レンコボートにも本発明を容易に実施すること
ができる。
That is, by appropriately moving the wedge member IA in the direction indicated by arrow 2 in FIG.
Attach the wedge member LA to the rear plate ba' of the stern end ba of the Lenco boat B in the operating state shown by the solid line in the figure, or completely remove the wedge member LA from the stern end ba of the Lenco boat B, or The wedge member IA is configured so that it can be pulled up and fixed into a non-operating state as shown by the dotted line in the figure. In addition, 3 in the figure is the wedge member IA.
a guide and holding member for the stern end ba;
It is composed of a substantially U-shaped member in plan view fixed to the lower outer surface of the rear plate ba''. With this structure, the present invention can be easily applied to a conventional existing Renko boat for fishing boats. can.

ところで、上記各実施例においては、漁船用レンコボー
トBの船体とは別部材で構成されたウェッジ部材IAを
、その船体に対して固定的または着脱自在に取り付けた
ものを示したが、レンコボートHの船体に一体的かつ連
続的にウェッジ部1を形成したものも本発明の技術的範
囲に包含されることは勿論である。
Incidentally, in each of the above embodiments, the wedge member IA, which is a separate member from the hull of the Renco boat B for a fishing boat, is fixedly or detachably attached to the hull. Of course, a structure in which the wedge portion 1 is integrally and continuously formed on the hull of the H is also included in the technical scope of the present invention.

〔発明の効果〕〔Effect of the invention〕

以上詳述したところから明らかなように、本発明によれ
ば、漁船用レンコボートの船尾後端部における底面のほ
ぼ全船幅に亘って、その全船長に比べて前後長さが極く
短くて且つ前方(船首側)から後方(船尾側)に向かっ
て下方に傾斜する揚力発生面を備えたウェッジ部1を形
成するという、レンコボートの重量や排水量や浸水面積
およびその製造コストを殆ど増加させない程度の極く簡
素かつ小規模な形状改良を施すのみでありながら、親船
の航行時にはレンコボートを滑走状態に近い状態で曳航
させ得るようになり、それによってレンコポートの粘性
摩擦抵抗および造波抵抗を従来船壁のものに比べて極端
に減少させることができ、以って、レンコボートとそれ
に対する親船との組み合わせとしての漁船全体の推進性
能を大幅に向上させて船速を増加させ得る、という優れ
た効果が発揮されるに至ったのである。
As is clear from the detailed description above, according to the present invention, the longitudinal length of the Lenko boat for fishing boats is extremely short compared to the entire length of the boat over almost the entire width of the bottom at the rear end of the stern. In addition, the wedge part 1 is formed with a lift generating surface that slopes downward from the front (bow side) to the rear (stern side), which increases the weight, displacement, flooded area, and manufacturing cost of the Renco boat. Although it is only a very simple and small-scale modification to the shape that does not cause damage, it is now possible to tow the Renco boat in a nearly planing state when the parent ship is sailing, thereby reducing the viscous frictional resistance of the Renco port and the structure. Wave resistance can be significantly reduced compared to conventional hull walls, thereby significantly improving the propulsion performance of the entire fishing boat as a combination of the Lenco boat and its parent boat, increasing ship speed. As a result, excellent effects have been achieved.

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

第1図(イ)、(ロ)は、特許請求の範囲に記載された
本発明に係る漁船用レンコボートの基本的構成(クレー
ム対応図)を示す全体概略側面図およびレンコボートの
概略後面図であり、第1図(ハ)はその作用を説明する
ために用いる全体概略側面図である。 また、第2図ないし第5図は、本発明に係る漁船用レン
コボートの具体的実施例を示し、第2図(イ)はレンコ
ボートの要部の拡大側面図、第2図(イ)はその概略ボ
ディプラン図、第3図は実験結果のグラフ(船速−BH
Pカーブ)、第4図は実験結果のグラフ(造波抵抗係数
カーブ)、第5図は別実施例の要部の一部断面側面図で
ある。 そして、第6図および第7図は、本発明の技術的背景な
らびに従来技術を説明するためのものであって、第6図
は従来の漁船およびレンコボートの全体概略側面図、第
7図(イ)はレッコボートの概略側面図、第7図(ロ)
はその概略ボディプラン図を夫々示している。 A・・・・・・・・・・・・親船、Aa・・・・・・・
・・・・・親船の船尾部、aa・・・・・・・・・・・
・親船の船尾部の後端部、B・・・・・・・・・・・・
漁船用レンコボート、Bf・・・・・・・・・・・・レ
ンコボートの船首部、bf・・・・・・・・・・・・レ
ンコボートの船首部の前端部、Ba・・・・・・・・・
・・・・・・レンコボートの船尾部、ba・・・・・・
・・・・・・・・・レンコボートの船尾部の後端部、1
・・・・・・・・・・・・ウェッジ部、la・・・・・
・・・・・・・ウェッジ部の揚力発生面、IA・・・・
・・・・・・・・ウェッジ部材、L・・・・・・・・・
・・・レンコボートの全船長、!・・・・・・・・・ウ
ェッジ部の前後長、T・・・・・・・・・・・・レンコ
ボートの船尾トランザム、TO・・・・・・・・・・・
・レンコボートの船尾トランザムの底面、WS・・・・
・・・・・・・・水平面、α・・・・・・・・・・・・
ウェッジ部の揚力発生面の水平面に対する角度。
FIGS. 1(A) and 1(B) are an overall schematic side view and a schematic rear view of the Lenco boat showing the basic configuration (view corresponding to the claims) of the Lenco boat for fishing boats according to the present invention as set forth in the claims. FIG. 1(c) is an overall schematic side view used to explain its operation. Moreover, FIGS. 2 to 5 show specific embodiments of the Lenco boat for fishing boats according to the present invention, and FIG. 2 (A) is an enlarged side view of the main parts of the Lenco boat, and FIG. Figure 3 is a graph of the experimental results (vessel speed - BH).
P curve), FIG. 4 is a graph of the experimental results (wave resistance coefficient curve), and FIG. 5 is a partially sectional side view of the main part of another example. 6 and 7 are for explaining the technical background of the present invention and the prior art, FIG. 6 is an overall schematic side view of a conventional fishing boat and a Renko boat, A) is a schematic side view of the Recco boat, Figure 7 (B)
1 and 2 respectively show their schematic body plans. A・・・・・・・・・ Main ship, Aa・・・・・・
・・・・・・Stern part of parent ship, aa・・・・・・・・・
- Rear end of the stern of the parent ship, B...
Lenco boat for fishing boat, Bf......Fore part of Lenco boat, bf...Forward end of bow of Lenco boat, Ba...・・・・・・
・・・・・・Stern part of Renko boat, ba・・・・・・
...... Rear end of the stern of the Renko boat, 1
・・・・・・・・・・・・Wedge part, la...
・・・・・・Lift generation surface of wedge part, IA...
・・・・・・・・・Wedge member, L・・・・・・・・・
...All captains of Renko boats!・・・・・・・・・Front and rear length of wedge part, T・・・・・・・・・Renko boat stern transom, TO・・・・・・・・・・・・
・Bottom surface of Renko boat's stern transom, WS...
・・・・・・・・・Horizontal plane, α・・・・・・・・・・・・
The angle of the lift generating surface of the wedge with respect to the horizontal plane.

Claims (1)

【特許請求の範囲】 〔1〕港と漁場との間において、その船首部の前端部の
底面を親船の船尾部の後端部にもたせかけた姿勢にて該
親船に連結された状態で、該親船に曳航される漁船用レ
ッコボートであって、その船尾部の後端部における底面
のほぼ全船幅に亘って、その全船長に比べて前後長さが
極く短くて且つ前方(船首側)から後方(船尾側)に向
かって下方に傾斜する揚力発生面を備えたウェッジ部を
形成してあることを特徴とする漁船用レッコボート。 〔2〕前記ウェッジ部の前後長さを、全船長の3〜10
%に設定してある特許請求の範囲第〔1〕項に記載の漁
船用レッコボート。 〔3〕前記ウェッジ部の揚力発生面の水平面に対する角
度を、前記親船が静止しているときの静止連結浮き状態
において3〜6度になるように設定してある特許請求の
範囲第〔1〕項または第〔2〕項に記載の漁船用レッコ
ボート。 〔4〕前記ウェッジ部を形成するに、前記の如き揚力発
生面を備えたウェッジ部材を、レッコボート船体の船尾
トランザムの最後端部に対して着脱自在に、または、作
用状態と非作用状態とに姿勢変更自在に取り付けてある
特許請求の範囲第〔1〕項ないし第〔3〕項の何れかに
記載の漁船用レッコボート。 〔5〕前記レッコボート船体の船尾トランザムの底面を
上方に凹んだアーチ型に形成してある特許請求の範囲第
〔4〕項に記載の漁船用レッコボート。
[Scope of Claims] [1] A state in which the vessel is connected to a parent vessel between a port and a fishing ground with the bottom of the front end of the bow part leaning against the rear end of the stern of the parent vessel. This is a recco boat for a fishing boat towed by the parent ship, and the length of the fore-and-aft is extremely short compared to the entire length of the boat over almost the entire width of the bottom surface at the rear end of the stern part, and the front A recco boat for a fishing boat, characterized in that a wedge portion is formed with a lift generating surface that slopes downward from the bow side to the rear (stern side). [2] The longitudinal length of the wedge section should be 3 to 10 times the total length of the ship.
% of the fishing boat according to claim 1. [3] The angle of the lift generating surface of the wedge portion with respect to the horizontal plane is set to be 3 to 6 degrees in a stationary connected floating state when the parent ship is stationary. ] or the recco boat for fishing boats described in [2]. [4] To form the wedge portion, the wedge member provided with the lift generating surface as described above is detachably attached to the rearmost end of the stern transom of the Recco boat hull, or can be placed in an active state and a non-active state. A recco boat for a fishing boat according to any one of claims [1] to [3], which is attached so that its posture can be changed. [5] The Recco boat for a fishing boat according to claim [4], wherein the bottom surface of the stern transom of the Recco boat hull is formed into an upwardly concave arch shape.
JP14850585A 1985-07-05 1985-07-05 Baby boat for fishing boat Pending JPS628891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14850585A JPS628891A (en) 1985-07-05 1985-07-05 Baby boat for fishing boat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14850585A JPS628891A (en) 1985-07-05 1985-07-05 Baby boat for fishing boat

Publications (1)

Publication Number Publication Date
JPS628891A true JPS628891A (en) 1987-01-16

Family

ID=15454259

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14850585A Pending JPS628891A (en) 1985-07-05 1985-07-05 Baby boat for fishing boat

Country Status (1)

Country Link
JP (1) JPS628891A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6444894U (en) * 1987-09-14 1989-03-17
JP2002154475A (en) * 2000-11-22 2002-05-28 Kawasaki Heavy Ind Ltd Transom stern type stern shape and its wave making resistance reducing method
KR100652092B1 (en) * 2006-02-17 2006-12-01 정 남 고 Structure the rear ship

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5973384A (en) * 1982-10-18 1984-04-25 Mitsui Eng & Shipbuild Co Ltd Device for reducing resistance to hull

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5973384A (en) * 1982-10-18 1984-04-25 Mitsui Eng & Shipbuild Co Ltd Device for reducing resistance to hull

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6444894U (en) * 1987-09-14 1989-03-17
JPH0539040Y2 (en) * 1987-09-14 1993-10-01
JP2002154475A (en) * 2000-11-22 2002-05-28 Kawasaki Heavy Ind Ltd Transom stern type stern shape and its wave making resistance reducing method
KR100522962B1 (en) * 2000-11-22 2005-10-24 가부시키 가이샤 가와사키 조센 Method For Reducing Wave Making Resistance At Transom Stern And Transom Stern Form
KR100652092B1 (en) * 2006-02-17 2006-12-01 정 남 고 Structure the rear ship

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