JPS632839B2 - - Google Patents
Info
- Publication number
- JPS632839B2 JPS632839B2 JP7827480A JP7827480A JPS632839B2 JP S632839 B2 JPS632839 B2 JP S632839B2 JP 7827480 A JP7827480 A JP 7827480A JP 7827480 A JP7827480 A JP 7827480A JP S632839 B2 JPS632839 B2 JP S632839B2
- Authority
- JP
- Japan
- Prior art keywords
- water flow
- resistance plate
- water
- marker
- mooring
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 55
- 239000003550 marker Substances 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Description
【発明の詳細な説明】
船舶の交通のはげしい海峡等に設置する航路標
識には離出距離が少なく、また、波浪等による動
揺の殆んどない引込み係留式のスパーブイが最も
適している。なかでも、沈錘にユニバーサルジヨ
イントあるいはシヤツクル等により標柱体下部を
直結した形式のスパーブイより鎖等の係留索によ
り係留し水深に対する調節を可能とし、設標時の
計画水深との誤差の調整や設標位置の変更による
水深変更を係留索の長さで調整の出来るようにし
たスパーブイが取扱い上大変すぐれている。[Detailed Description of the Invention] A retractable mooring type spar buoy is most suitable for navigational aids to be installed in straits etc. where there is heavy ship traffic, as it has a short departure distance and is hardly shaken by waves or the like. In particular, it is possible to adjust the water depth by mooring a super buoy with a mooring line such as a chain from a super buoy in which the lower part of the column body is directly connected to the sinking weight using a universal joint or shackle, etc., and to adjust for errors with the planned water depth at the time of installation. The super buoy is very easy to handle as it allows the length of the mooring line to be adjusted to change the water depth due to position changes.
しかし、海峡等では潮流が数ノツトにも達する
所が多く、このため、係留式のものでは水流によ
る標体の水流に直角方向の振動、あるいは施回等
の有害な運動が誘起される危険があつた。このた
め、スパーブイは航路標識としての優れた点があ
るにも拘らず、潮流のある所では、いまだにスパ
ーブイが実用化されるまでに至らなかつた。 However, in many places such as straits, the current reaches several knots, and for this reason, moored type vessels run the risk of inducing harmful movements such as vibrations or rotations at right angles to the water flow of the target. It was hot. For this reason, although super buoys are excellent as navigation aids, they have not yet been put into practical use in areas with tidal currents.
本発明は、振動防止の抵抗板に工夫を加え、各
種水深で実験を行なつた結果にもとづいて、係留
索式のスパーブイであつても、急潮流において充
分使用に耐える引込み係留式スパーブイを提供す
るものである。 The present invention provides a retractable mooring type super buoy that can sufficiently withstand use in rapid currents, even if it is a mooring cable type super buoy, based on the results of experiments at various water depths with the addition of a vibration prevention resistance plate. It is something to do.
以下図面に示す実施例に従つて、本発明の内容
を詳述する。 The contents of the present invention will be explained in detail below according to embodiments shown in the drawings.
第１図は本発明にかかるスパーブイで急流中で
も振動．動揺．回動．ラツタ現象のない１例を示
す外観正面図、第２図ａ，ｂは第１図のイ部とそ
の平面図である。 Figure 1 shows a super buoy according to the present invention that vibrates even in rapid water. upset. Rotation. FIGS. 2A and 2B are a front view of the external appearance showing an example without the rattling phenomenon, and FIGS. 2A and 2B are a section A in FIG. 1 and a plan view thereof.
図示するように、本スパーブイは頂部に灯器１
を装着した標柱体２の途中に浮力体３を有して、
標柱体２の下端を係留索４により海底の沈錘５に
引込み係留される。浮力体３は常に水中に全没さ
せられ、水線が浮力体３の上方の標柱体２の途中
にくるよう、かつ、浮力体３の浮力により標柱体
２が水中に直立するように設けられる。スパーブ
イの浮力体３より下方の標柱体２の下部には、抵
抗体６が装着される。抵抗体６は水流に直角方向
の水流抵抗板７（標柱体２からの突出長さをl1と
する）と、水流方向の振動抵抗板８（突出長さを
l2とする）とで構成される。（第２図ａ，ｂ参照）
水流抵抗板７の面積(A)は、振動抵抗板８の面積
(B)より大きくするもので、図例では両抵抗板７と
８の高さｈは等しくし、水流抵抗板７の長さl1
を、振動抵抗板８の長さl2より長くしている。 As shown in the figure, this super buoy has a light fixture on the top.
Having a buoyant body 3 in the middle of the marker body 2 equipped with
The lower end of the marker body 2 is pulled into and moored to a sinker 5 on the seabed by a mooring cable 4. The buoyant body 3 is always completely submerged in the water, and is installed so that the water line is located halfway above the buoyant body 3 and in the middle of the marker 2, and the buoyant force of the buoyant body 3 causes the marker 2 to stand upright in the water. . A resistor 6 is attached to the lower part of the marker column 2 below the buoyant body 3 of the super buoy. The resistor 6 consists of a water flow resistance plate 7 in the direction perpendicular to the water flow (the protrusion length from the marker 2 is l 1 ) and a vibration resistance plate 8 in the water flow direction (the protrusion length is l1).
l 2 ). (See Figure 2 a, b) The area (A) of the water flow resistance plate 7 is the area of the vibration resistance plate 8.
(B) In the example shown, the heights h of both resistance plates 7 and 8 are equal, and the length of water flow resistance plate 7 is l 1
is made longer than the length l 2 of the vibration resistance plate 8.
尚、第１図および第２図では水流抵抗板７と振
動抵抗板８とを標柱体２に対し同一高さ位置に十
字状に設けたものを示したが、第３図に示すよう
に振動抵抗板８の上方に水流抵抗板７を配するよ
うな段違い式に装着するようにしてもよい。 Although FIGS. 1 and 2 show the water flow resistance plate 7 and the vibration resistance plate 8 arranged in a cross shape at the same height relative to the marker 2, as shown in FIG. The water flow resistance plate 7 may be installed in a staggered manner such that the water flow resistance plate 7 is placed above the resistance plate 8.
以上のような構成とすることによつて、スパー
ブイが水流中にある時は水流抵抗板７の両片が水
流と直角の方向に位置している。もし、何らかの
原因で、第２図ｃに示すように、抵抗体７が水流
に対してθだけ反時計方向に回動したとすると、
水流の上流方向に傾斜した方の抵抗板７と標柱体
あるいは振動抵抗板８とで水をせきとめた状態に
なり水の抵抗は大きくなり、反対に下流方向に傾
斜した方の抵抗板７に対しては水が抵抗板７の表
面を滑る状態となり水の抵抗は減少するので、
（第２図ｃの水流を示す矢印参照）結果として、
上流方向に傾斜した抵抗板７は水流に押し戻され
る。 With the above configuration, when the super buoy is in the water flow, both pieces of the water flow resistance plate 7 are located in a direction perpendicular to the water flow. If for some reason the resistor 7 rotates counterclockwise by θ with respect to the water flow, as shown in Figure 2c, then
The water is held back by the resistance plate 7 that slopes in the upstream direction of the water flow and the marker or vibration resistance plate 8, and the resistance of the water becomes large. In this case, the water slides on the surface of the resistance plate 7, and the water resistance decreases.
(See the arrow indicating the water flow in Figure 2c) As a result,
The resistance plate 7 inclined in the upstream direction is pushed back by the water flow.
また、水流抵抗板７が水流方向に１致して置か
れた場合、第２図ｄに示すように、小角θ回つた
状態では振動抵抗板８の上流側には流れは乱れず
下流側では後流内に入る為、θが大きくなる方向
に回動が働き、θが大きくなり、前記したように
水流抵抗板７が水流に正対した位置で回動を停止
する。即ち、第２図ｂの位置が水流中の安定した
位置であることが実験により確認された。つぎ
に、水流抵抗板７の面積(A)に対して、振動抵抗板
８の面積(B)を等しくすると、即ちl1＝l2として実
験すると、水流に対し45度の位置で平衝状態を保
つが、時々平衝が破れ回転運動をする。 In addition, when the water flow resistance plate 7 is placed in line with the water flow direction, the flow is not disturbed on the upstream side of the vibration resistance plate 8 and the flow is not disturbed on the downstream side when the water flow resistance plate 7 is rotated by a small angle θ, as shown in Fig. 2d. Since it enters the flow, it rotates in the direction in which θ becomes larger, and θ becomes larger, and as described above, the water flow resistance plate 7 stops rotating at the position directly facing the water flow. That is, it was confirmed through experiments that the position shown in FIG. 2b is a stable position in the water flow. Next, when the area (A) of the water flow resistance plate 7 is made equal to the area (B) of the vibration resistance plate 8, that is, when performing an experiment with l 1 = l 2 , a state of equilibrium is reached at a position of 45 degrees to the water flow. However, sometimes the equilibrium is broken and rotational movement occurs.
また、方向板をつけたもの或は抵抗板を前後の
長さを変え方向性を持たせたものでは振動に対す
る抵抗が前後で異なりフラツタ現象が現われる。 Furthermore, in the case of a device equipped with a directional plate or a device in which the length of the resistance plate is changed from front to back to give directionality, the resistance to vibration differs between the front and back, and a flutter phenomenon occurs.
また、面積(A)と面積(B)の比は最適範囲を求める
為Ｂ／Ａを種々変えて実験した。その実験結果に
よれば面積(B)と面積(A)の比（Ｂ／Ａ）は0.3から
0.5の範囲内において選ぶことが良い。第４図は
係留鎖４の長さが水深の1/2の長さの場合の実験
結果を示し、Ｂ／Ａの値が0.5以上では旋回運動
が30゜以上に大きく現われる。この場合係留鎖の
リンク数がかなり多く、旋回に対する自由度もか
なりあり、旋回角度30゜までの旋回では係留鎖の
摩耗は問題となる程ではなく差支えない。また係
留鎖の長さが短くなればなる程鎖のリンク数が少
くなり、旋回に対する抵抗が大きくなり、カーブ
の立上り点は第４図の１の方に近づき、係留鎖が
水深の1/5の場合にはカーブの立上り点が0.5とな
り、カーブの傾斜も急となる。この場合リンク数
が少いため旋回運動を起した場合、１ケのリンク
に摩耗が集中する傾向があり、係留鎖が短い場合
もＢ／Ａを0.5を限界とするのがよい。従つて
Ｂ／Ａの上限は0.5とすれば旋回運動による鎖の
摩耗は防止できる。 Further, in order to find the optimum range for the ratio of area (A) to area (B), experiments were conducted by varying B/A. According to the experimental results, the ratio of area (B) to area (A) (B/A) is from 0.3 to
It is best to choose within the range of 0.5. Fig. 4 shows the experimental results when the length of the mooring chain 4 is 1/2 the length of the water depth, and when the value of B/A is 0.5 or more, the turning movement appears significantly at 30 degrees or more. In this case, the number of links in the mooring chain is quite large, and there is a considerable degree of freedom for turning, and when the mooring chain is turned at a turning angle of up to 30 degrees, wear of the mooring chain is not a problem. Also, as the length of the mooring chain becomes shorter, the number of links in the chain decreases, and the resistance to turning increases. In the case of , the rising point of the curve is 0.5, and the slope of the curve is also steep. In this case, since the number of links is small, when a turning movement occurs, wear tends to concentrate on one link, so even if the mooring chain is short, it is best to limit B/A to 0.5. Therefore, if the upper limit of B/A is set to 0.5, wear of the chain due to rotational movement can be prevented.
次にＢ／Ａが0.3以下であれば第４図のように
旋回運動は全く現れず、よいが、Ｂ／Ａが０に近
づく程Ａ／Ｂの倍率が大きくなる。一方振動抵抗
板の効果を出すためには振動抵抗板の面積(B)はあ
る程度（必要最小限の面積）必要であり、また水
流抵抗板の面積(A)が大きくなれば、それだけ浮標
全体の水流抵抗も大きくなり浮標および係留索の
傾斜が大きくなり好ましくない。 Next, if B/A is less than 0.3, no turning movement will appear as shown in FIG. 4, which is good, but as B/A approaches 0, the magnification of A/B increases. On the other hand, in order to produce the effect of the vibration resistance plate, the area (B) of the vibration resistance plate needs to be to a certain extent (minimum area), and the larger the area (A) of the water flow resistance plate, the larger the area of the entire buoy. Water flow resistance also increases, and the inclination of the buoy and mooring line increases, which is undesirable.
従つてＢ／Ａの下限を旋回運動が現われなくな
る点の値、0.3とすればよい。 Therefore, the lower limit of B/A may be set to 0.3, which is the value at which turning motion no longer appears.
実験の結果によれば、以上のような抵抗体６を
全長49mのスパーブイに装着し、22mの長さの係
留索で、水深60m、水流４ノツトの海域に引込み
係留した場合、実用上問題となるような振動、回
転あるいはフラツタ現象等は現われなかつた。 According to the results of the experiment, if the above-mentioned resistor 6 was attached to a spar buoy with a total length of 49 m and the mooring line was pulled in and moored with a 22 m long mooring line in a sea area with a water depth of 60 m and a current of 4 knots, there would be no practical problems. No such vibration, rotation, or flutter phenomenon appeared.
このように、抵抗体６を面積の異なる水流抵抗
板７と振動抵抗板８とで構成し、これを標柱体２
の前後．両側に設けるようにしたことで、潮流の
激しい場所にあたつても、スパーブイを水流の方
向に正対させ、振動抵抗板により振動・動揺・回
動・フラツタ現象を起こすことなく安定させるこ
とができ、且つ、スパーブイの傾斜角度を小さく
する効果もある。従つて、船舶の交通の激しい、
且つ、また潮流の速い海峡等において、引込み係
留式スパーブイの特徴を生かし、しかも係留索式
の設標、水深変更等取扱いの容易な振動・動揺・
回動あるいはフラツタ現象等の有害な運動を起こ
すことのない優れたスパーブイを提供できる特徴
がある。 In this way, the resistor 6 is composed of the water flow resistor plate 7 and the vibration resistor plate 8 with different areas, and this is connected to the marker pole body 2.
Before and after. By installing it on both sides, even in areas with strong currents, the super buoy can be placed squarely in the direction of the water flow, and the vibration resistance plates can be used to stabilize the buoy without causing vibration, oscillation, rotation, or flutter phenomena. This also has the effect of reducing the inclination angle of the spar buoy. Therefore, heavy ship traffic,
In addition, in straits with fast currents, etc., it takes advantage of the characteristics of the retractable mooring type super buoy, and also has a mooring line type structure, vibration and oscillation that can be easily handled by changing the water depth, etc.
It has the feature of providing an excellent super buoy that does not cause harmful movements such as rotation or flutter phenomenon.
第１図は本発明にかかる引込み係留式スパーブ
イの外観正面図、第２図ａは第１図のイ部を示す
部分図、第２図ｂは第２図ａの平面図、第２図
ｃ，ｄおよび第３図ｂはスパーブイがθ度回動し
た場合の水流抵抗板７に対する水流の状態を示し
た図、第３図ａは水流抵抗板７と振動抵抗板８と
を段違い状に標柱体２の下部に設けた例図、第４
図は水流抵抗板７の面積(A)と振動抵抗板８の面積
(B)との比に対するスパーブイの回転角度の関係を
示すグラフ図である。
２……標柱体、３……浮力体、４……係留索、
５……沈錘、６……抵抗体、７……水流抵抗板、
８……振動抵抗板。
Fig. 1 is an external front view of a retractable mooring type spar buoy according to the present invention, Fig. 2 a is a partial view showing part A of Fig. 1, Fig. 2 b is a plan view of Fig. 2 a, and Fig. 2 c , d and FIG. 3b are diagrams showing the state of water flow against the water flow resistance plate 7 when the super buoy is rotated by θ degrees, and FIG. Example diagram provided at the bottom of body 2, No. 4
The figure shows the area (A) of water flow resistance plate 7 and the area of vibration resistance plate 8.
(B) A graph showing the relationship between the rotation angle of the super buoy and the ratio. 2... Marker body, 3... Buoyant body, 4... Mooring rope,
5... sinker, 6 ... resistance element, 7... water flow resistance plate,
8... Vibration resistance plate.
Claims (1)
抵抗体を設け、標柱体の下端を係留索により沈錘
に係留して浮力体を水中に引込み、かつ、水線が
浮力体上方に標柱体の途中にくるようにし、浮力
により水中に直立するようにした引込み係留式ス
パーブイにおいて、抵抗体を水流に直角方向の水
流抵抗板と水流方向の振動抵抗板とで十字状に構
成し、水流抵抗板の長さを振動抵抗板の長さより
長くし、かつ振動抵抗板の面積(B)と水流抵抗板の
面積(A)の比（Ｂ／Ａ）を0.3〜0.5としたことを特
徴とする引込み係留式スパーブイ。1 A buoyant body is provided in the middle of the marker body, a resistor is provided at the bottom of the marker body, the lower end of the marker body is moored to a sinker with a mooring cable, the buoyant body is pulled into the water, and the water line is above the buoyant body. In a retractable mooring type spar buoy, which is placed in the middle of the marker column and is made to stand upright in the water due to buoyancy, the resistance body is configured in a cross shape with a water flow resistance plate in the direction perpendicular to the water flow and a vibration resistance plate in the water flow direction. , the length of the water flow resistance plate is longer than the length of the vibration resistance plate, and the ratio (B/A) of the area (B) of the vibration resistance plate to the area (A) of the water flow resistance plate is 0.3 to 0.5. Features a retractable mooring type spar buoy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7827480A JPS574492A (en) | 1980-06-09 | 1980-06-09 | Retractively moored spar buoy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7827480A JPS574492A (en) | 1980-06-09 | 1980-06-09 | Retractively moored spar buoy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS574492A JPS574492A (en) | 1982-01-11 |
| JPS632839B2 true JPS632839B2 (en) | 1988-01-20 |
Family
ID=13657393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7827480A Granted JPS574492A (en) | 1980-06-09 | 1980-06-09 | Retractively moored spar buoy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS574492A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2988948B2 (en) * | 1990-01-25 | 1999-12-13 | 応用地質株式会社 | Super buoy type work scaffold |
| CN111216847B (en) * | 2020-01-31 | 2021-01-12 | 邓新华 | Positioning buoy for ocean monitoring |
-
1980
- 1980-06-09 JP JP7827480A patent/JPS574492A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS574492A (en) | 1982-01-11 |
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