JPS5853596A - Light buoy - Google Patents

Abstract

PURPOSE:To secure the stable stationary condition of a light buoy in a water flow, by a method wherein the direction of a shorter resistance plate is set to coincide with the fitting direction of a mooring piece, in the light buoy provided with longer and shorter resistance plates in a crossed configuration at the lower end part of a column or body. CONSTITUTION:A light buoy is provided with a lighting fixture 2 at the upper end of the columnar body 1, the longer and shorter resistance plates 3 in a crossed configuration at the lower end part of the body 1, a float body 4 at an intermediate part of the body 1, and the mooring piece 5 fitted to the body 1 at an intermediate position between the float body 4 and the resistance plates 3. The mooring piece 5 moored to an anchor resting at the seabed by a mooring cable 6, and the fitting direction of the piece 5 is set to coincide with the direction of the shorter resistance plate 7. Accordingly, under the function of the longer and shorter resistance plates 3, the direction of the shorter resistance plate 7 coincides with the direction of water flow to stabilize the buoy. Namely, the shorter resistance plate 7 is directed in the direction of the water flow to function as a vibration-preventing resistance plate, while the longer resistance plate 8 is directed orthogonally to the direction of the water flow to perform a stabilizing action by resisting to the water flow.

Description

【発明の詳細な説明】 本発明は流れの速い海峡とか河川に適した十字状抵抗板
を有する浮遊式灯浮標の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a floating light buoy with a cross-shaped resistance plate suitable for fast-flowing straits and rivers.

従来長短十字状抵抗板を備えた浮遊式灯浮標としては、
特公昭４２−９６１６号公報に示されるような灯浮標が
使用されていた。As a conventional floating light buoy equipped with long and short cross-shaped resistance plates,
A light buoy as shown in Japanese Patent Publication No. 42-9616 was used.

この従来の灯浮標は、筒体（柱体）の下端部に２枚１対
の羽根（抵抗板）を十字状に設けると共に、その一方の
羽根を他方の羽根より長くし、短い方の羽根は潮流の抵
抗板として潮流と直角方向に、また、長い方の羽根は方
向板として潮流の方向に配するようにし、浮体と羽根の
中間の柱体上において、係留索を、長い方の羽根即ち、
方向羽根と同一方向になるように係留片を取付けたもの
である。This conventional light buoy has a pair of blades (resistance plates) arranged in a cross shape at the lower end of the cylinder (column), one blade is longer than the other, and the shorter blade is is placed perpendicular to the tidal flow as a tidal current resistance plate, and the longer blade is placed in the direction of the tidal current as a directional plate. That is,
The mooring piece is attached so that it is in the same direction as the direction vane.

このようにすることによって、急潮流の場所にあっても
常に直立状態を保ち、かつ、方向性を維持するようにし
たものであった。By doing this, it was possible to always stay upright and maintain direction even in areas with rapid currents.

然し、この従来の灯浮標は、実際の使用において、直立
性は良かったが、方向性については、潮流によって回動
することがあり、為に係留索が柱体や抵抗板にからんだ
一すする場合があって、その接触した部分や係留部が摩
耗損傷するといった事例を生ずることがあった。However, in actual use, this conventional light buoy had good uprightness, but its directionality was subject to rotation due to tidal currents. There have been cases where the mooring parts and mooring parts have been worn out and damaged.

この原因を解明するためこのような長短十字状抵抗板を
有する浮遊式灯浮標が、潮流に対して、十字状抵抗板が
どのような条件にあるとき回動し、”ニジπ−′、″：
二二工１２．。２０．２□りなる十字状抵抗板を下部に
有する柱体・を１由に回動できるように水流中に保持し
く第４図参照）、かつ、短辺ａと長辺すとの長さの関係
を種々に変えて、その各場合における回動状況を調べた
。In order to elucidate the cause of this, a floating light buoy with such long and short cross-shaped resistance plates rotates in relation to the tidal current, and under what conditions does the cross-shaped resistance plate rotate? :
12. . 20.2 A column with a cross-shaped resistance plate at the bottom is held in the water flow so that it can rotate in one direction (see Figure 4), and the length of the short side a and the long side The rotation situation in each case was investigated by changing the relationship between the two.

その結果、ｂとａに長短°をつけた場合は、第３図に示
すように、ｂ）ａで　／ａ＝２．０より少ない場合は、
灯浮標は第２図（ロ）に示すように、短辺を水流方向に
おいて、その左右に最大３０度の回転角度で回動し、そ
の振れは　　／ａ　が大きくなるん減少し、ｂ／、Ｌ＝
２．０即ち、短辺ａを長辺すの１／２　長さとした場合
は、短辺ａの方向が水流と同一方向線上÷僅かに左右に
２度振れる程度で安定し、また、ｂ／、＝２．５とする
と、短辺ａを水流と同一方向において静止し、回動は殆
んど見られなくなることが判明した。As a result, when b) and a are given lengths and degrees, as shown in Figure 3, if b) a is less than /a = 2.0, then
As shown in Figure 2 (b), the light buoy rotates left and right at a maximum rotation angle of 30 degrees with its short side in the water flow direction, and its swing decreases as /a increases, and b/, L=
2.0, that is, when the short side a is 1/2 the length of the long side, the direction of the short side a is on the same direction as the water flow ÷ it is stable with a slight swing of 2 degrees to the left and right, and b/ , = 2.5, it was found that the short side a stands still in the same direction as the water flow, and almost no rotation is observed.

しかし、短辺ａを０近かく、　／ａ＝３以上とすると、
柱体に生ずるカルマン渦の影響が、短辺ａの抵抗板（振
動防止抵抗板）の振動抵抗に打ち勝って左右に振れるよ
うになる。However, if the short side a is close to 0 and /a=3 or more,
The influence of the Karman vortex generated in the column overcomes the vibration resistance of the resistance plate (vibration prevention resistance plate) on the short side a, allowing it to swing left and right.

即ち、従来の長辺を水流方向に一致させる場合とは全く
逆に、ｂ／ａ＝２．０〜３．０の範囲では短辺が水流方
向に一致して安定し、長辺が水流に直角な水流抵抗板と
して作用する。In other words, in the range of b/a = 2.0 to 3.0, the short side is stable and coincides with the water flow direction, and the long side is stable in the water flow direction, completely opposite to the conventional case where the long side is aligned with the water flow direction. Acts as a right-angled water flow resistance plate.

本発明は、このような長短十字状の抵抗板を有する灯浮
標の水流に対する特性に基づいて、係留片の取付方向を
短辺の抵抗板と同一方向として、短辺抵抗板を左右の振
れ（振動）を防止する為の抵抗板、即ち、振動防止抵抗
板とし、長辺の抵抗板を水流に直角な水流抵抗板とする
と共に、長辺の水流抵抗板の長さを、短辺の振動防止抵
抗板の長さの２倍以上３倍以下としたもので、これによ
り、水流中にあっても灯浮標が回動することなく、係留
索のからみや、係留部の摩耗損傷事故の極めて少ない、
且つ、灯浮標の向きの安定した直立性の良い経済的な灯
浮標を提供できるようにしたものである。The present invention is based on the characteristics of a light buoy having long and short cross-shaped resistance plates with respect to water flow, and the mooring piece is installed in the same direction as the short side resistance plates, so that the short side resistance plates are free from lateral deflection ( In other words, the long side resistance plate is a water flow resistance plate perpendicular to the water flow, and the length of the long side water flow resistance plate is equal to the short side vibration. This prevents the light buoy from rotating even in water flow, and prevents accidents such as entanglement of mooring lines and wear and tear of mooring parts. few,
Moreover, it is possible to provide an economical light buoy with stable orientation and good uprightness.

以下添付図面に示す実施例に従いその内容を詳述する。The contents will be described in detail below according to the embodiments shown in the accompanying drawings.

第１図（イ）は本発明にかかる灯浮標の外観正面図で第
１図（ロ）はその要部の側面図を示す。FIG. 1(A) is a front view of the external appearance of a light buoy according to the present invention, and FIG. 1(B) is a side view of its essential parts.

また、第２図（イ）（ロ）は十字状抵抗板の平面図とそ
の動作説明図であり、第３図は十字状抵抗板の長辺と短
辺との長さ比に対する灯浮標の回転角度の関係を孝子実
験特性図である。In addition, Figures 2 (a) and (b) are a plan view of the cross-shaped resistance plate and an explanatory diagram of its operation, and Figure 3 is a diagram of the light buoy with respect to the length ratio of the long side and short side of the cross-shaped resistance plate. It is a characteristic diagram of a Takako experiment showing the relationship between rotation angles.

図示するように、本発明の灯浮標は、柱体（１）の上端
に灯具（２）を有し、下端部に長短十字状抵抗板（３）
を有し、途中に浮力体（４）を備え、浮力体（４）と抵
係留片（５）を係留索（６）によって海底の沈錘（図示
せず）に係留するようにした構造のものからなっている
。（上側において、灯具（２）を支承する浮力体（４）
より上方の柱体（１）は、これを櫓状のものとし、この
櫓状体でａｍ＜２）を支承するようにしてもよ０）十字
状抵抗板（３）は、第２図（イ）に示すように、短辺の
振動防止抵抗板（７）と長辺の水流抵抗板（８）とで構
成される。（矢印は水流の方向を示す）本発明において
は、係留片（５）の取付方向を短辺の抵抗板（７）の方
向と同一にしたもので（第１図（ロ）参照）これによっ
て、長短の抵抗板の作用で灯浮標は、短辺が水流方向に
一致して安定静止する。As shown in the figure, the light buoy of the present invention has a lamp (2) at the upper end of a column (1), and a long and short cross-shaped resistance plate (3) at the lower end.
It has a structure in which a buoyant body (4) is provided in the middle, and the buoyant body (4) and the mooring piece (5) are moored to a sinker (not shown) on the seabed by a mooring line (6). consists of things. (On the upper side, there is a buoyant body (4) that supports the lamp (2)
The upper column (1) may be shaped like a turret, and the turret-shaped body may support am<2). As shown in a), it is composed of a vibration prevention resistance plate (7) on the short side and a water flow resistance plate (8) on the long side. (The arrow indicates the direction of water flow.) In the present invention, the attachment direction of the mooring piece (5) is the same as the direction of the resistance plate (7) on the short side (see Fig. 1 (b)). Due to the action of the long and short resistance plates, the light buoy stands still stably with its short side aligned with the water flow direction.

更に、係留片（５）の腕長０と灯浮標の水流抵抗の復元
モーメントで更に安定することになる。Furthermore, the arm length of the mooring piece (5) is 0 and the restoring moment of the water flow resistance of the light buoy makes it even more stable.

即ち、係留索（６）により灯浮標が設置されると、短辺
の抵抗板（７）は水流の方向と一致して振動防止抵抗板
として作用し、長辺の抵抗板（８）は水流に直角な水流
抵抗板として安定作用し、急流中でも灯浮標は動揺、回
動することなく安定直立する。That is, when the light buoy is installed by the mooring line (6), the resistance plate (7) on the short side matches the direction of the water flow and acts as an anti-vibration resistance plate, and the resistance plate (8) on the long side acts as a vibration prevention resistance plate in line with the direction of the water flow. It acts stably as a water flow resistance plate perpendicular to the current, and the light buoy stands stably upright without wobbling or rotating even in rapid water.

また、このように設置された灯浮標は河川や海峡等にお
ける急潮流中においても振動０回動の運動が防止され係
留索と柱体の巻きつきによる損傷、係留金具の極度な摩
耗等の防止となる。In addition, light buoys installed in this way are prevented from vibrating and rotating without vibration even during rapid currents in rivers, straits, etc., preventing damage caused by entanglement of the mooring line and column, and excessive wear on the mooring fittings. becomes.

従って、従来より長期間灯浮標が流出する事故もなく、
機能を発揮することができる。Therefore, there is no accident of the light buoy being spilled out for a longer period of time than before.
able to perform its functions.

また、この種灯浮標では、回動が起こることは、水流抵
抗板の水流抵抗が変ることになり、従って、前後左右の
傾きが生じ、複雑な動揺回動運動となり、灯浮標の灯光
の遼遠性が損なわれる結果となる。従って、回動が起こ
ることは絶対避けねばならず、本発明では、この点を完
全に解決したものである。In addition, when this type of light buoy rotates, the water flow resistance of the water flow resistance plate changes, which causes a tilting of the front, back, left, and right, resulting in a complicated oscillation and rotation movement, and the light of the light buoy changes in the distance. This results in loss of sexuality. Therefore, rotation must be absolutely avoided, and the present invention completely solves this problem.

また、水流中で直立するための抵抗を発生する抵抗板が
、長辺の抵抗板（８）（従来は短辺）となり、水流方向
の振動防止抵抗板が短辺の抵抗板（７）（従来は長辺）
となった事により、従来より水流方向の抵抗板が小形に
なり、経済的な面からも優れている。従って、全体とし
て小形にすることができ、取扱いにも便利である。In addition, the resistance plate that generates resistance to stand upright in the water flow is the long side resistance plate (8) (conventionally the short side), and the vibration prevention resistance plate in the water flow direction is the short side resistance plate (7) ( Conventionally, the long side)
As a result, the resistance plate in the water flow direction is smaller than before, and it is also superior from an economical point of view. Therefore, it can be made compact as a whole and is convenient to handle.

以上のように本発明にかかる灯浮標は、海峡とか運河な
どのように、絶えず流れがあり、また、その流れの方向
が時間により変るような場所に適するが、灯浮標が常に
安定静止し有害な回転運動がなく直立性も良いので、係
留索が柱体や十字状抵抗板にからむようなことが無く、
従って摩耗損傷事故を少なくしつる外、係留部の摩擦に
よる損耗も大巾に減ることとなって、寿命の長い経済的
な灯浮標を提供することができる。As described above, the light buoy according to the present invention is suitable for places where there is constant flow, such as in straits or canals, and where the direction of the flow changes with time. Since there is no rotational movement and the mooring line has good uprightness, there is no chance of the mooring cable getting entangled with the column or cross-shaped resistance plate.
Therefore, in addition to reducing wear and tear accidents, the wear and tear of the mooring portion due to friction is also greatly reduced, making it possible to provide an economical light buoy with a long life.

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

第１図（イ）は本発明にかかる灯浮標の外観正面図、第
１図（ロ）は第１図（イ）の要部側面図、第２図（イ）
は第１図（ロ）のハーバ断面図、第２図（ロ）は十字状
抵抗板の動作説明図、第３図は、十字状抵抗板の回動枠
・性的線図、第４図（イ）（ロ）は長短十字状抵抗板を
有する柱体を自由に回動できるように水中に保持し・た
実験装置の概略を示す正面図とその平面図であ゛る。 体、（５）、、、係留片、（６）、、、係留索、（７）
、、、振動防止抵抗板、（８）、、、水流抵抗板。 特許出願人　　竹　安　　猪　三　１性（６）集１凹 （イ） 第２図 第３図 一一一り　棒 第４図 （イ） （ロ）Figure 1 (A) is an external front view of the light buoy according to the present invention, Figure 1 (B) is a side view of the main part of Figure 1 (A), and Figure 2 (A).
is a cross-sectional view of the harbor in Figure 1 (b), Figure 2 (b) is an explanatory diagram of the operation of the cross-shaped resistance plate, Figure 3 is a rotation frame and sexual diagram of the cross-shaped resistance plate, and Figure 4 (a) and (b) are a front view and a plan view schematically showing an experimental apparatus in which a column having long and short cross-shaped resistance plates is held in water so as to be freely rotatable. Body, (5), Mooring piece, (6), Mooring rope, (7)
, , Anti-vibration resistance plate, (8), , Water flow resistance plate. Patent Applicant Take Yasu Ino 3 1 Sex (6) Collection 1 Concave (A) Figure 2 Figure 3 111 Bar Figure 4 (A) (B)

Claims (1)

【特許請求の範囲】 １、柱体の上端に灯具を、下端部に長短十字状の抵抗板
を、また、途中に浮力体を備え、浮力体と抵抗板の中間
の柱体に係留片を有し、係留片を沈錘に係留するように
した浮遊式灯浮標において、係留片の取付方向を水流方
向の短辺の振動防止抵抗板の方向とし、長辺の抵抗板を
水流に直角な水流抵抗板としたことを特徴とする灯浮標
。 ２、長辺の水流°抵抗板の長さを短辺の振動防止抵抗板
の長さの２倍以上３倍以下とした特許請求の範囲第１項
記載の灯浮標。[Claims] 1. A lamp is provided at the upper end of the column, a long and short cross-shaped resistance plate is provided at the lower end, a buoyant body is provided in the middle, and a mooring piece is provided on the column between the buoyant body and the resistance plate. In a floating light buoy in which the mooring piece is moored to the sinker, the direction in which the mooring piece is installed is in the direction of the vibration prevention resistance plate on the short side in the water flow direction, and the resistance plate on the long side is perpendicular to the water flow. A light buoy characterized by a water flow resistance plate. 2. The light buoy according to claim 1, wherein the length of the water flow resistance plate on the long side is not less than 2 times and not more than 3 times the length of the vibration prevention resistance plate on the short side.