JPS6319279Y2 - - Google Patents

Description

【考案の詳細な説明】 この考案は主にタグボートに取付けられる船舶
用の防舷材に関する。[Detailed Description of the Invention] This invention relates to a fender for ships that is mainly attached to tugboats.

従来、この種の防舷材としては第１図に示すよ
うなものがある。同図の防舷材１は、ゴムにより
細長く形成されたもので、細長い受衝面２、取付
面３、取付孔４、中空部５を有し、長手方向に直
角な断面形状が同図Ｃに見られるように大略台形
状である。その断面において受衝面２は比較的大
きな円弧からなる凸形であり、中空部５は円形で
ある。図中６は埋設した補強鋼板である。これと
は別に前記のものと形状が似ていて岸壁に取付け
て使用する防舷材として、実公昭37−26679号公
報、実公昭37−19960号公報などに示されたもの
がある。これらはいずれも断面形状が第２図に示
すような台形状で、中空部７が円孔ではなく台形
又は台形に近い形状のものであり、荷重を支える
脚部８，８が一様な厚さであり、受衝面９は平面
である。第１図に示すものでは受衝面２に荷重を
受けて弾性変形するときその変形が中空部５の外
方の図に１０で示す部分で局部的にきわめて大き
くなり、すなわち局部的に負担がかかつた状態と
なるため、その部分１０が損傷し易く、寿命が短
い問題があつた。また、第２図に示すようなもの
では岸壁に取付けて使用するものであるから、荷
重が作用して変形を始める初期反力が相当に大き
い。これは船の接岸時のエネルギー吸収量が大き
いことが必要なものであるから当然のことであ
る。しかし、タグボートに使用するような場合
は、船舶の大きさに較べて推力が大きいため、初
期反力の大きいものにすると撥ね返えされる不都
合がある。これらのほかに、円筒形状のものがあ
るが、初期反力が低く、過圧縮状態になりやすい
ために耐久性に乏しい。 Conventionally, there is a fender of this type as shown in FIG. The fender 1 shown in the figure is made of rubber and has an elongated impact receiving surface 2, a mounting surface 3, a mounting hole 4, and a hollow part 5, and its cross-sectional shape perpendicular to the longitudinal direction is C. It is roughly trapezoidal as seen in the figure. In its cross section, the impact receiving surface 2 has a convex shape consisting of a relatively large arc, and the hollow portion 5 is circular. 6 in the figure is a buried reinforcing steel plate. Apart from this, there are fenders that are similar in shape to the above-mentioned ones and are used by being attached to quay walls, as disclosed in Publication of Utility Model Publication No. 37-26679 and Publication of Utility Model Publication No. 37-19960. All of these have a trapezoidal cross-sectional shape as shown in Fig. 2, the hollow part 7 is not a circular hole but a trapezoid or a shape close to a trapezoid, and the load-bearing legs 8, 8 have a uniform thickness. The impact receiving surface 9 is a flat surface. In the case shown in FIG. 1, when the impact-receiving surface 2 undergoes elastic deformation due to the load, the deformation becomes extremely large locally at the outside of the hollow portion 5, indicated by 10 in the figure. Because of this, the portion 10 is easily damaged and has a short lifespan. In addition, since the device shown in FIG. 2 is used by being attached to a quay, the initial reaction force at which the load acts and causes deformation is quite large. This is natural since it is necessary for the ship to absorb a large amount of energy when berthed. However, when used in tugboats, the thrust is large compared to the size of the vessel, so if the initial reaction force is large, there is a problem in that it will be bounced back. In addition to these, there are cylindrical shapes, but they have low initial reaction force and are prone to overcompression, resulting in poor durability.

上述したようなことから、この考案は適切な反
力を生じると共に耐久性の良い船舶取付用防舷材
を提供することを目的とするものである。 In view of the above, the object of this invention is to provide a fender for mounting on a ship that generates an appropriate reaction force and has good durability.

以下この考案を図示の１実施例に基いて説明す
る。第３図において、２０は防舷材、２１は取付
基盤部、２２は脚状部、２３は受衝部、２４は中
空部である。 This invention will be explained below based on one embodiment shown in the drawings. In FIG. 3, 20 is a fender, 21 is a mounting base portion, 22 is a leg-shaped portion, 23 is a shock receiving portion, and 24 is a hollow portion.

取付基盤部２１は、所定の厚さと幅を有する細
長い長方形の板状に形成され、一方の面が船体に
取付けられる取付面２５とされている。図中２６
は補強鋼板、２７は取付用のボルト挿通孔であ
る。 The mounting base portion 21 is formed in the shape of an elongated rectangular plate having a predetermined thickness and width, and one surface thereof serves as a mounting surface 25 for mounting on the hull. 26 in the diagram
27 is a reinforcing steel plate and a bolt insertion hole for mounting.

脚状部２２は、基盤部２１の取付面２５の反対
側の面の幅方向両側から全長にわたつて起立し、
対称形をなしており、その先端に双方を連結する
ように受衝部２３が連らなつている。双方の脚状
部２２，２２はその間隔寸法が受衝部２３側から
基盤部２１側に近ずくに従つて小さくなつてい
る。また、双方の脚状部２２の外面は基盤部２１
側から受衝部２３側に近ずくに従つて互いに近寄
るように傾斜してる。従つて、防舷材２０の側面
外形は第３図Ｃに見られるように基盤部２１を底
辺とする台形状であり、脚状部２２は基板部２１
側で太く徐々に細くなつて受衝部２３に達してい
る。この脚状部２２には前記ボルト挿通孔２７に
対する座ぐり部２８を設けてある。 The leg portions 22 stand up over the entire length from both sides in the width direction of the surface opposite to the mounting surface 25 of the base portion 21,
It has a symmetrical shape, and a shock receiving part 23 is connected to the tip thereof so as to connect the two parts. The distance between the two leg portions 22, 22 decreases from the impact receiving portion 23 side toward the base portion 21 side. Further, the outer surface of both leg-shaped parts 22 is connected to the base part 21.
They are inclined so that they approach each other as they approach the impact receiving part 23 from the side. Therefore, the side profile of the fender 20 is trapezoidal with the base portion 21 as the base, as shown in FIG.
It is thick at the side and gradually tapers to reach the impact receiving part 23. This leg portion 22 is provided with a counterbore portion 28 for the bolt insertion hole 27 .

受衝部２３は、防舷材２０の長手方向に沿つた
脚状部２２の全長にわたつてその双方に連らなつ
ており、外面が受衝面２９とされている。受衝部
２３は同図Ｃに断面として見られるように受衝面
２９が比較的大きい凸形の円弧であり、内面が受
衝面２９の円弧よりも小さい凹形の円弧である。 The impact-receiving portion 23 extends along the entire length of the leg portion 22 along the longitudinal direction of the fender 20, and has an outer surface serving as an impact-receiving surface 29. In the impact receiving portion 23, as seen in cross section in FIG.

なお、第３図Ｃの主要寸法の１例を示すと、次
のようになる。Ａ＝200mm、Ｂ＝360mm、Ｈ＝300
mm、ａ＝125mm、ｂ＝95mm、ｃ＝130mm、ｈ＝130
mm、ｒ＝62.5mmである。そして、一般的には、Ａ
＜Ｂ、ＡはＨの0.5〜0.8倍、ＢはＨの1.1〜1.3倍、
ａ≧ｂ、ｈはＨの1/3〜2/3、ｒはＨの1/5〜1/3、
ｃ＞ｒであることが望まれる。 An example of the main dimensions in FIG. 3C is as follows. A=200mm, B=360mm, H=300
mm, a=125mm, b=95mm, c=130mm, h=130
mm, r=62.5 mm. And in general, A
<B, A is 0.5 to 0.8 times H, B is 1.1 to 1.3 times H,
a≧b, h is 1/3 to 2/3 of H, r is 1/5 to 1/3 of H,
It is desired that c>r.

このような構成の防舷材は、第１図に示す従来
のものと同様に、ボルト挿通孔２７を利用して船
体に取付けて使用する。 The fender having such a structure is used by being attached to the hull using the bolt insertion holes 27, similar to the conventional fender shown in FIG.

受衝部２９に荷重を受けたときの反力と歪との
関係を実験結果に基いて第４図に従来のものと共
に示す。同図において、曲線イは第３図に示した
本願実施例のもの、曲線ロは第１図に示した従来
のもの、曲線ハは第２図に示した従来の岸壁取付
用防舷材のもの、曲線ニは円筒型のものである。
曲線イは曲線ロに較べて上側にあり、歪量を45％
としたとき吸収エネルギーが約20％向上してい
る。そして、曲線イは曲線ハに較べてかなり下側
にあるが、歪量20％の初期反力がかなり小さく、
しかし曲線ロ，ニほどには小さくない。従つて、
船舶取付用防舷材としては吸収エネルギーが多
く、船体が撥ね返えされるほど初期反力が大でな
く、実施例ものが性能面で大きく改善されてい
る。また、受衝面２９に荷重を受けて変形したと
きの状態の側面形状を見ると、脚状部２２、２２
の受衝部側が両側に開らいた形であり、変形が全
体に波及しており、第１図のものの場合のように
局部的に集中していない。これは第１図の防舷材
１では中空部５が円孔であるから部分１０におい
て局部的に他よりも薄肉となつていてその部分１
０よりも受衝側も取付側も丈夫な構成であるのに
対し、本願の防舷材２０では中空部２４が取付基
盤部２１側に拡大した状態であつて脚状部２２が
取付基盤部２１側へ徐々に肉厚となつているから
である。そしてさらに大荷重によつて大きく変形
した状態では、第１図の防舷材１はその中空部５
がきわめて小さくなつていて受衝側ゴムが入り込
めず両側に張り出す形となつて外表面が取付ボル
トに接触した状態となるのに対し、本願の防舷材
２０は受衝部２３が中空部２４に入り込んだ状態
となつて両側の外表面が取付ボルトに接触するよ
うなことがない。このことは本願の防舷材２０が
取付ボルトによつて損傷を受けないのであり、局
部的な大きな変歪が軽減されていることを含めて
耐久性も大幅に改善されているのである。 The relationship between reaction force and strain when a load is applied to the impact receiving portion 29 is shown in FIG. 4 based on experimental results, together with the conventional one. In the figure, curve A is for the embodiment of the present invention shown in FIG. 3, curve B is for the conventional fender shown in FIG. 1, and curve C is for the conventional fender for quay wall installation shown in FIG. The curve 2 is cylindrical.
Curve A is on the upper side compared to curve B, and the amount of distortion is reduced by 45%.
When this happens, the absorbed energy has improved by approximately 20%. Although curve A is much lower than curve C, the initial reaction force at 20% strain is quite small.
However, it is not as small as curves B and D. Therefore,
As a fender for mounting on a ship, it absorbs a lot of energy, and the initial reaction force is not so large that the ship's body is thrown back, so the performance of the example is greatly improved. Moreover, when looking at the side shape when the impact receiving surface 29 is deformed by receiving a load, the leg-like portions 22, 22
The impact-receiving portion side of the structure is open on both sides, and the deformation spreads over the entire structure and is not concentrated locally as in the case of the structure shown in FIG. This is because in the fender 1 shown in Fig. 1, the hollow part 5 is a circular hole, so the wall is locally thinner in the part 10 than in other parts.
In contrast, in the fender 20 of the present application, the hollow portion 24 is expanded toward the mounting base portion 21 side, and the leg-like portions 22 are attached to the mounting base portion. This is because the thickness gradually increases toward the 21 side. When the fender 1 in FIG. 1 is greatly deformed due to an even larger load, the hollow portion
The fender 20 of the present application has a hollow impact receiving part 23, whereas the fender 20 of the present application has a hollow impact receiving part 23. There is no possibility that the outer surfaces of both sides will come into contact with the mounting bolts by entering the portion 24. This means that the fender 20 of the present application is not damaged by the mounting bolts, and its durability is greatly improved, including the reduction of large local deformations.

以上のようにこの考案によれば、初期反力が従
来の逆Ｖ字型の岸壁用防舷材（第２図のもの）の
ように高くなく、また円筒形状のものほど低くな
く、接舷時の緩衝性が船舶取付用防舷材として理
想的であり、しかも所定の歪量に達すると岸壁用
防舷材と同等の反力を確保できる改良された船舶
取付用防舷材を提供できる。 As described above, according to this invention, the initial reaction force is not as high as that of the conventional inverted V-shaped quay fender (the one in Figure 2), nor as low as that of the cylindrical fender, and the It is possible to provide an improved fender for ships, which has ideal shock-absorbing properties as a fender for ships, and which can secure a reaction force equivalent to that of quay fenders when a predetermined amount of strain is reached. .

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

第１図は従来の船舶取付用防舷材を示しａは正
面図、ｂは底面図、ｃはｄのＳ−Ｓ断面図、第２
図は第１図のものと似た形状の従来の岸壁取付用
防舷材の断面図、第３図はこの考案の船舶取付用
防舷材の実施例を示しａは正面図、ｂは底面図、
ｃはｂのＱ−Ｑ断面拡大図、第４図は実施例及び
従来の防舷材の反力と歪の関係を示すグラフであ
る。 ２０……防舷材、２１……取付基盤部、２２…
…脚状部、２３……受衝部、２４……中空部、２
７……孔、２８……座ぐり部、２９……受衝面。 Figure 1 shows a conventional fender for mounting on a ship; a is a front view, b is a bottom view, c is a sectional view taken along line S-S in d, and
The figure is a cross-sectional view of a conventional fender for mounting on a quay with a shape similar to that in Fig. 1, and Fig. 3 shows an example of the fender for mounting on a ship of this invention, where a is a front view and b is a bottom view. figure,
c is an enlarged cross-sectional view taken along the line Q-Q of b, and FIG. 4 is a graph showing the relationship between reaction force and strain of the example and conventional fenders. 20...Fender material, 21...Mounting base part, 22...
... Leg-shaped part, 23 ... Impact receiving part, 24 ... Hollow part, 2
7... hole, 28... counterbore, 29... impact receiving surface.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 一方の面が船体側取付面とされた所定幅及び所
定厚さの細長い形状の取付基盤部と、その基盤部
の他方の面の幅方向両側から間隔を隔てて全長に
わたつて起立した対称形状の脚状部と、その脚状
部の先端を全長にわたつて連結するように形成さ
れた受衝部とからなる中空体であり、その長手方
向に直角な断面の外形が上記取付面側を底辺とす
る大略台形状あつて受衝部外面が比較的大きい凸
形の円弧であり、上記断面において受衝部内面が
外面に較べて小さい凹形の円弧であり上記脚状部
内面が上記円弧の両端に連らなり基盤部に近ずく
に従つて双方の間が受衝部側よりも狭まくなつて
おり、上記取付基盤部の外縁部の適所に厚さ方向
に貫通して取付孔を穿設されその取付孔に対して
上記脚状部に座ぐり部を形成されていることを特
徴とする船舶取付用防舷材。 An elongated mounting base with a predetermined width and a predetermined thickness, with one surface serving as the hull side mounting surface, and a symmetrical shape that stands up over the entire length at a distance from both sides of the other surface of the base. It is a hollow body consisting of a leg-like part and an impact-receiving part formed to connect the tips of the leg-like parts over the entire length, and the outer shape of the cross section perpendicular to the longitudinal direction faces the mounting surface side. The base is approximately trapezoidal and the outer surface of the impact receiving portion is a relatively large convex circular arc, and in the cross section, the inner surface of the impact receiving portion is a concave arc smaller than the outer surface, and the inner surface of the leg portion is the circular arc. The space between the two becomes narrower as it approaches the base part than the impact receiving part side, and a mounting hole is formed by penetrating the outer edge of the mounting base part in the thickness direction at a suitable place. 1. A fender for mounting on a ship, characterized in that a counterbore is formed in the leg-shaped part for the mounting hole.