JPS606397Y2 - retractable mooring light buoy - Google Patents

Description

【考案の詳細な説明】 本考案は海峡とか河口附近のように水の流れやかなり速
くまた時間によって流れの方向が反対方向に変るような
場所に適する引込み係留式灯浮標に関する。[Detailed Description of the Invention] The present invention relates to a retractable mooring type light buoy suitable for places where water flows fairly quickly and the direction of the flow changes in opposite directions depending on time, such as in a strait or near an estuary.

水底附近に達する細長い円柱状標柱体の途中に浮力体を
設け、沈錘により浮力体が常に水中に全没する状態に引
込み係留し、浮標の大きな余剰浮力（浮標の浮力浮標と
係留索の重量）により強力に上方に附勢し、灯浮標を直
立させるようにした引込み係留式灯浮標は、その特質と
して波浪による動揺が少なく、従ってふれ回りが極めて
少ないので浮遊式灯浮標に比し性能は非常に優れたもの
である。A buoyant body is installed in the middle of the elongated cylindrical marker body that reaches near the water bottom, and the buoyant body is always pulled in and moored in a state where it is completely submerged in the water using a sinking weight. ) The retractable mooring type light buoy, which is strongly energized upward by the force of the floating light buoy and keeps the light buoy upright, has a characteristic that it is less shaken by waves and therefore has extremely little wobbling, so its performance is lower than that of the floating light buoy. It is very good.

しかし標体が水面から水底近くにわたって垂直状に存在
するため潮の流れの速い所では水の抵抗が大きく使用は
不向きとされていた。However, because the specimen exists vertically from the water surface to near the bottom, it was considered unsuitable for use in areas with fast currents due to high water resistance.

これは潮流などにより標体が傾斜するといった問題につ
いては、浮力体の容積を大きくして予備浮力を増し、沈
錘の重量も増すことによって潮流に抗して標体をほぼ垂
直状態に保たせることは可能であるが、潮流によって振
動が発生する可能性があるため、潮の流れの速い所では
使用されていなかった。This is to solve the problem of the target tilting due to tidal currents, etc., by increasing the volume of the buoyant body to increase reserve buoyancy, and increasing the weight of the sinker to keep the target almost vertical against the current. Although it is possible to do so, it has not been used in areas with fast currents because the current may cause vibrations.

標体にひとたび振動が発生すると灯器の故障、標体の強
度疲労などの不具合を誘発して使用不能の事態に陥る恐
れがあった。Once vibrations were generated in the specimen, there was a risk that it would cause malfunctions such as failure of the lamp equipment or strength fatigue of the specimen, rendering it unusable.

振動の原因としては、水の流れにより標体のまわりに第
６図に示すようにカルマン渦が発生しその影響で水流に
より横方向の力が水流に対して直角方向に交互に標体に
作用し、これが起振力として働く。The cause of the vibration is that a Karman vortex is generated around the specimen by the water flow, as shown in Figure 6, and as a result, lateral forces are applied to the specimen alternately at right angles to the water flow. This acts as an excitation force.

比較的短い係留索により係留される引込み係留式灯浮標
の場合、実験の結果第７図に示すように沈錘を中心とし
係留索を振子の長さとした振子運動と、浮力体を中心と
した標柱体の往復運動とが加わって生ずる連成振動（こ
の振動は浮標が太きな余剰浮力により強力に上方に附勢
されているため起る）と、上記カルマン渦の影響による
起振力とが共振して発生することがわかった。In the case of a retractable mooring type light buoy that is moored with a relatively short mooring line, the experimental results show that there is a pendulum movement with the sinker as the center and the mooring line as the length of the pendulum, and a pendulum movement with the buoyant body as the center, as shown in Figure 7. The coupled vibration caused by the reciprocating motion of the column (this vibration occurs because the buoy is strongly urged upward by the large surplus buoyancy), the excitation force due to the influence of the Karman vortex mentioned above, and was found to occur due to resonance.

本考案は浮力体および標柱体の構造を前後に長い形状と
し、標柱体下端部に振動防止用の十字状板を取付けるこ
とによって海峡とか河口などのように急潮流の場所にお
いても振動、動揺を発生しないしかも水流の抵抗の少な
い引込み係留式灯浮標を提供するもので以下図面に従っ
て本案内容を詳述する。In this invention, the structure of the buoyant body and the marker column is long in the front and back, and a cross-shaped plate for vibration prevention is attached to the bottom end of the marker column to prevent vibration and sway even in places with rapid currents such as straits and estuaries. The purpose is to provide a retractable mooring type light buoy that does not generate water flow and has low resistance to water flow.

第１図Ａは比較的短い鎖等で係留された引込み係留式灯
浮標に本考案構造を装着した例を示し、図中１は標柱体
で第３図Ａに示すように断面が扁平な楕円状または同図
ＢＸＣのように円柱に整流板を付けた構造とする。Figure 1A shows an example in which the structure of the present invention is attached to a retractable mooring type light buoy moored with a relatively short chain, etc. In the figure, 1 is the beacon body, which has a flat elliptical cross section as shown in Figure 3A. Or, as shown in figure BXC, it has a structure in which a rectifying plate is attached to a cylinder.

２は標柱体１の途中に装着された前後に長い筐体よりな
る浮力体で、第１図Ａは前後に長い扁平筒体でその平面
は第２図Ａ−Ｄに示す前後に長い抵抗の少ない形状とな
すでいる。2 is a buoyant body consisting of a longitudinally long casing attached to the middle of the marker column 1, and Fig. 1A is a flat cylindrical body that is longitudinally long, and its plane is the same as that of the longitudinally long resistance shown in Figs. 2A-D. It has less shape and eggplant.

第１図Ｂは他の実施例で浮力体２の側面が第２図Ａ〜Ｄ
に示す平面と同様な形状をもったものを示す。FIG. 1B shows another embodiment, and the side surface of the buoyant body 2 is shown in FIGS. 2A to D.
This shows something with a shape similar to the plane shown in .

３．３′は係留環で標柱体１の下端において、浮力体２
の短軸方向と同一方向に突設される。3.3' is a mooring ring which is connected to the buoyant body 2 at the lower end of the marker body 1.
protrudes in the same direction as the minor axis of the

４．４′は鎖等でなる係留索、５は沈錘、６は十字状板
で標柱体１の下端部に設けられる。4.4' is a mooring cable made of a chain or the like, 5 is a sinker, and 6 is a cross-shaped plate provided at the lower end of the marker body 1.

以上において、標柱体１はその途中に装着された浮力体
２が常に水中に全没して水線が浮力体２より上方の標柱
体１の途中にあるようにし、かつ浮標の大きな余剰浮力
により標体が水中で直立するように係留索４，４′によ
って沈錘５に係留される。In the above, the buoyant body 2 installed in the middle of the marker body 1 is always completely submerged in the water so that the water line is in the middle of the marker body 1 above the buoyant body 2, and due to the large surplus buoyancy of the buoy, The specimen is moored to a sinker 5 by mooring lines 4, 4' so as to stand upright in the water.

係留索４，４′は浮力体２の短軸方向において標柱体１
の下端の左右両側をそれぞれ沈錘５に浮標の大きな余剰
浮力に抗して引込み係留するので標体の方向を固定でき
、浮力体２の長軸方向を水流の方向に一致させて設標す
ることか可能となる。The mooring lines 4, 4' are attached to the marker 1 in the short axis direction of the buoyant body 2
The left and right sides of the lower end of the buoy are moored by pulling them into sinkers 5 against the large surplus buoyancy of the buoy, so the direction of the buoy can be fixed, and the buoy can be set up with the long axis direction of the buoy aligned with the direction of the water flow. It becomes possible.

以上のように本案は浮力体２および標柱体１を前後に長
い形状としその長軸方向の尖鋭部が水流の方向に向かう
ので、水の抵抗が少なく流れが円滑となって整流効果を
増し、乱流やカルマン渦の発生を防いで沈錘を中心とし
た振子運動（第７図参照）の発生を防ぐとともに水流の
抵抗を感じ、標体の直立を助ける。As described above, in this case, the buoyancy body 2 and the marker body 1 are long in the front and back, and the sharp parts in the long axis direction face the direction of the water flow, so there is less water resistance, the flow is smoother, and the rectification effect is increased. It prevents the occurrence of turbulence and Karman vortices, prevents pendulum motion centered on the sinker (see Figure 7), and feels the resistance of the water flow, helping to keep the object upright.

標柱体１ならびに浮力体２の形状の選択は工作上の容易
性、標柱体と浮力体との調和など考慮し経済的なものと
すればよい。The shapes of the marker 1 and the buoyant body 2 may be selected economically by considering ease of construction and harmony between the marker and the buoyant body.

標柱体下端部に十字状板６を装着することによって、た
とえカルマン渦が発生した場合でも、水に対する抵抗体
として作用するので急速に振動が減衰し、実際上振動の
発生を防止することができる。By attaching the cross-shaped plate 6 to the lower end of the marker body, even if a Karman vortex is generated, it acts as a resistor against water, so the vibration is rapidly damped, and the generation of vibration can be practically prevented. .

以上のように本考案は浮力体および標柱体を水流方向に
前後に長い形状としたことにより水流中でのカルマン渦
の発生を防ぐとともに水の抵抗を減じ標体の直立を助け
、十字状板６を取付けたことおよび係留索４，４′で左
右より係留する構造としたことにより、振動の発生を防
止し、これらの相乗効果により、本願考案の灯浮標は急
潮流中でも振動発生のない安定した直立性のよい灯浮標
となった。As described above, this invention prevents the generation of Karman vortices in the water flow by making the buoyant body and the marker column long in the longitudinal direction of the water flow, reduces water resistance, helps the marker stand upright, and cross-shaped 6 and the mooring structure moored from the left and right with mooring ropes 4 and 4' prevent the occurrence of vibrations, and due to the synergistic effect of these, the light buoy of the present invention is stable without vibrations even in rapid currents. It became a light buoy with good uprightness.

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

第１図Ａは係留索を用いた引込み係留式灯浮標の正面図
、第２図は第１図Ａのａ−ａ断面図でＡ〜Ｄはそれぞれ
実施態様を示す。 第１図Ｂは浮力体の別の実施例を示す側面図。 第３図は第１図のｂ−ｂ断面図でＡ−Ｃはそれぞれの実
施態様を示す。 第４図は係留部の側面図、第５図は第１図のｃ−ｃ断面
図、第６図はカルマン渦発生状況図、第７図は係留索に
より連結された標体の振動が発生した場合の状況図。 １は標柱体、２は浮力体、３，３′は係留環、４．４′
は係留索、５は沈錘、６は十字状板。FIG. 1A is a front view of a retractable mooring type light buoy using a mooring line, and FIG. 2 is a sectional view taken along the line aa of FIG. 1A, and A to D each show an embodiment. FIG. 1B is a side view showing another embodiment of the buoyancy body. FIG. 3 is a sectional view taken along line bb in FIG. 1, and lines A-C show respective embodiments. Figure 4 is a side view of the mooring section, Figure 5 is a sectional view taken along line CC in Figure 1, Figure 6 is a diagram of Karman vortex generation, and Figure 7 is vibration of the specimen connected by the mooring rope. A diagram of the situation if this happens. 1 is a marker body, 2 is a buoyant body, 3, 3' is a mooring ring, 4.4'
is a mooring line, 5 is a sinking weight, and 6 is a cross-shaped plate.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 標柱体の途中に浮力体、下端に係留環を有し、該係留環
と沈錘とを比較的短い係留索で係留し、浮力体を水中に
全没させ、かつ水線が浮力体の上方の標柱体の途中にく
るようにし、浮標の余剰浮力により水中に直立するよう
にした灯浮標において、浮力体を前後に長い筐体とし、
標柱体を前後に扁平な柱体とし、標柱体下端部に十字状
板を設け、標柱体下端を左右方向から係留索で沈錘に係
留するようにしたことを特徴とする引込み係留式The marker body has a buoyant body in the middle and a mooring ring at the lower end, and the mooring ring and sinker are moored with a relatively short mooring rope, so that the buoyant body is completely submerged in the water and the water line is above the buoyant body. In a light buoy, which is placed in the middle of the beacon body and stands upright in the water due to the excess buoyancy of the buoy, the buoyant body has a long casing from front to back,
A retractable mooring type characterized in that the marker body is a flat column in the front and back, a cross-shaped plate is provided at the lower end of the marker body, and the lower end of the marker body is moored from left and right to a sinker with a mooring cable.