JP2665138B2 - Fender - Google Patents
FenderInfo
- Publication number
- JP2665138B2 JP2665138B2 JP5338514A JP33851493A JP2665138B2 JP 2665138 B2 JP2665138 B2 JP 2665138B2 JP 5338514 A JP5338514 A JP 5338514A JP 33851493 A JP33851493 A JP 33851493A JP 2665138 B2 JP2665138 B2 JP 2665138B2
- Authority
- JP
- Japan
- Prior art keywords
- buckling
- load
- time
- fender
- diameter
- 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 - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Vibration Dampers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、船舶等の接岸時の衝撃
を緩衝するために岸壁に取り付けるテーパ状筒体の防舷
材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fender having a tapered cylindrical body attached to a quay for buffering an impact at the time of berthing of a ship or the like.
【０００２】[0002]
【従来の技術】テーパ状筒体の防舷材の従来例を図４、
図５によって説明する。図４は側面図、図５は断面図で
あり、図において、１はテーパ状筒体の支衝部であり、
先部から基部に向けて外径が一定の傾斜で太くなり、そ
の肉厚は先部から基部に向けてほぼ一定となっている。2. Description of the Related Art A conventional example of a fender having a tapered cylindrical body is shown in FIG.
This will be described with reference to FIG. FIG. 4 is a side view, and FIG. 5 is a cross-sectional view. In the drawing, reference numeral 1 denotes a support portion of a tapered cylindrical body,
The outer diameter increases at a constant inclination from the tip to the base, and the thickness is substantially constant from the tip to the base.
【０００３】２はこの支衝部１の径の大きい基部に設け
たドーナツ型の取り付け部、３は支衝部１の径の小さい
先部に設けたドーナツ型の受衝部であり、全体がゴムに
より一体に成形されている。このように構成された防舷
材は、取り付け部２により岸壁に固定され、受衝部３が
海に向けて突出して取り付けられることになる。[0003] Reference numeral 2 denotes a donut-shaped mounting portion provided at the base of the support portion 1 having a large diameter. Reference numeral 3 denotes a donut-shaped receiving portion provided at a front end of the support portion 1 having a small diameter. It is integrally formed of rubber. The fender thus configured is fixed to the quay wall by the mounting portion 2, and the receiving portion 3 is mounted so as to protrude toward the sea.
【０００４】したがって、接岸時の軸方向の圧縮荷重に
対して座屈変形の中心が支衝部１のほぼ中央で発生し、
座屈後のほぼ定荷重となる領域の歪みを最大限引き延ば
すことにより、吸収エネルギーの確保を保っている。Therefore, a center of buckling deformation is generated substantially at the center of the support portion 1 with respect to an axial compressive load at the time of berthing,
The absorption of energy is maintained by maximizing the strain in the region where the load becomes almost constant after buckling.
【０００５】[0005]
【発明が解決しようとする課題】このように防舷材は、
座屈後のほぼ定荷重となる領域の歪みを最大限引き延ば
すことにより、吸収エネルギーの確保を保っているが、
さらにそれ以上の吸収エネルギーの増大を図るために
は、座屈時の荷重を増大させることが必要となる。その
座屈時の荷重を増大させるためには、支衝部の肉厚を厚
くすることが効果的である。しかし、支衝部の内面側の
肉厚を厚くすると、座屈時の荷重は増大するが、支衝部
の内面接触が早まり、座屈後のほぼ定荷重域の歪みが大
幅に低下し、吸収エネルギーの増大には有効ではない。As described above, the fenders are
By maximizing the strain in the area where the load is almost constant after buckling, the absorption energy is maintained,
In order to further increase the absorbed energy, it is necessary to increase the load at the time of buckling. In order to increase the load at the time of the buckling, it is effective to increase the thickness of the support portion. However, when the thickness of the inner surface of the support part is increased, the load at the time of buckling increases, but the contact of the support part with the inner surface is accelerated, and the distortion in the almost constant load area after buckling is large. And is not effective in increasing the absorbed energy.
【０００６】また、外面側を全面にわたって厚くする
と、座屈時の荷重は増大するが、支衝部の外面と太径の
取り付け部の上面および小径の受衝部の下面との外面接
触が支衝部の内面接触より早くなり、座屈後のほぼ定荷
重域の歪みが低下するため、吸収エネルギーは増大する
もののその増大は極わずかでしかない。When the outer surface is made thicker over the entire surface, the load at the time of buckling increases, but the outer surface of the support portion contacts the upper surface of the large-diameter mounting portion and the lower surface of the small-diameter receiving portion. Since the contact speed becomes faster than the contact of the inner surface of the contact portion and the strain in the substantially constant load region after buckling is reduced, the absorbed energy is increased but the increase is very small.
【０００７】[0007]
【課題を解決するための手段】そこで、本発明は、外角
θ1 、内角θ2 のテーパ状筒体とした支衝部の外面に、
その径の大きい基部に設けた取り付け部および径の小さ
い先部に設けた受衝部からそれぞれ所定の距離ｓをおい
て所定の厚さαの厚肉部を形成したことを特徴とする。SUMMARY OF THE INVENTION Therefore, the present invention provides a tapered cylindrical body having an outer angle θ 1 and an inner angle θ 2 ,
A thick portion having a predetermined thickness α is formed at a predetermined distance s from a mounting portion provided on the base portion having a large diameter and a receiving portion provided on a tip portion having a small diameter.
【０００８】この厚肉部の好ましい条件としては、取り
付け部および受衝部から厚肉化開始端までの距離ｓと取
り付け部の上面から受衝部の下面までの距離Ｈの比は、
ｓ／Ｈ≧０．２０、厚肉幅αと支衝部の外面直径Ｄの比
は、α／Ｄ≦０．０４である。As a preferable condition of the thick portion, the ratio of the distance s from the mounting portion and the receiving portion to the thickening start end and the distance H from the upper surface of the mounting portion to the lower surface of the receiving portion is as follows.
s / H ≧ 0.20, and the ratio between the thick width α and the outer surface diameter D of the support portion is α / D ≦ 0.04.
【０００９】[0009]
【作用】支衝部の取り付け部および受衝部からそれぞれ
所定の距離をおいて中央部に所定の厚さの厚肉部を形成
したことにより、支衝部の座屈時の荷重が大幅に増大
し、支衝部外面と取り付け部および受衝部下面との外面
接触が支衝部内面接触より早く起こることを抑制し、座
屈後のほぼ定荷重域の歪みを厚肉化しない場合とほぼ同
程度に保持することが可能となる。[Function] By forming a thick portion having a predetermined thickness in the center at a predetermined distance from the mounting portion and the receiving portion of the support portion, the load at the time of buckling of the support portion is greatly reduced. increases, and if the outer surface contact between支衝portion outer surface and the attachment portion and the impact receiving bottom surface is suppressed to occur earlier than支衝section plane contact, no thickening strain of substantially static load area after buckling It is possible to keep them at substantially the same level.
【００１０】[0010]
【実施例】以下に本発明の一実施例を図面を用いて説明
する。図１は側面図、図２は断面図、図３は性能曲線図
であり、図において、４は外角θ1 、内角θ2 のテーパ
状筒体の両端からそれぞれ距離ｓの外面中央に厚肉部５
を形成した支衝部である。An embodiment of the present invention will be described below with reference to the drawings. 1 is a side view, FIG. 2 is a cross-sectional view, and FIG. 3 is a performance curve diagram. In the drawing, reference numeral 4 denotes a thick wall at the center of the outer surface at a distance s from both ends of the tapered cylindrical body having an outer angle θ 1 and an inner angle θ 2. Part 5
It is a supporting unit formed.
【００１１】２はこの支衝部４の径の大きい基部に設け
たドーナツ型の取り付け部、３は支衝部４の径の小さい
先部に設けたドーナツ型の受衝部であり、全体がゴムに
より一体に成形されている。そこで、各条件を下記の如
くした。 Ｄ／Ｈ＝１．０５ ｄ／Ｄ＝０．６８ θ1 ＝８９° θ2 ＝８８° ｓ／Ｈ＝０．２２ α／Ｄ＝０．０４ なお、Ｈ ： 支衝部の高さ Ｄ ： 支衝部中央の外径 ｄ ： 支衝部中央の内径 θ1 ： 支衝部外面傾斜角 θ2 ： 支衝部内面傾斜角 ｓ ： 取り付け部および受衝部から厚肉化開始端まで
の距離 α ： 支衝部外面厚肉幅 （１）比較のために従来技術による条件を示す。Reference numeral 2 denotes a donut-shaped mounting portion provided at the base of the support portion 4 having a large diameter. Reference numeral 3 denotes a donut-shaped receiving portion provided at a front end of the support portion 4 having a small diameter. It is integrally formed of rubber. Then, each condition was set as follows. D / H = 1.05 d / D = 0.68 θ 1 = 89 ° θ 2 = 88 ° s / H = 0.22 α / D = 0.04 H: height of the supporting portion D: Outer diameter at the center of the support part d: Inner diameter at the center of the support part θ 1 : Inclination angle of the outer surface of the support part θ 2 : Inclination angle of the inner surface of the support part s: Distance from the mounting part and the receiving part to the thickening start end α: Thickness of the outer surface of the support portion (1) The conditions according to the prior art are shown for comparison.
【００１２】Ｄ／Ｈ＝１．０５ ｄ／Ｄ＝０．６８ θ1 ＝８９° θ2 ＝８８° （２）つぎに、支衝部内面を厚肉とした従来技術による
条件を示す。D / H = 1.05 d / D = 0.68 θ 1 = 89 ° θ 2 = 88 ° (2) Next, conditions according to the prior art in which the inner surface of the support portion is thickened will be described.
【００１３】Ｄ／Ｈ＝１．０５ ｄ／Ｄ＝０．６６ θ1 ＝８９° θ2 ＝８８° （３）つぎに、支衝部外面を厚肉とした従来技術による
条件を示す。D / H = 1.05 d / D = 0.66 θ 1 = 89 ° θ 2 = 88 ° (3) Next, conditions according to the prior art in which the outer surface of the support portion is thickened will be described.
【００１４】Ｄ／Ｈ＝１．０８ ｄ／Ｄ＝０．６７ θ1 ＝８９° θ2 ＝８８° 以上示した本実施例と従来技術（１）〜（３）との実験
結果を以下に示す。D / H = 1.08 d / D = 0.67 θ 1 = 89 ° θ 2 = 88 ° The experimental results of the present embodiment shown above and the prior arts (1) to (3) are as follows. Show.
【００１５】実施例 支衝部の座屈時の荷重 ： ８１ｔ 座屈後ほぼ定荷重域をへて荷重が再上昇し座屈時の荷重
と同一となった時の歪み（以下荷重再上昇時の歪みとい
う。） ： ５２．５％ 吸収エネルギー ： ３３．０ｔ−ｍ 従来技術（１） 支衝部の座屈時の荷重 ： ６８ｔ 荷重再上昇時の歪み ： ５２．５％ 吸収エネルギー ： ２８．５ｔ−ｍ 従来技術（２） 支衝部の座屈時の荷重 ： ８５ｔ 荷重再上昇時の歪み ： ４５％ 吸収エネルギー ： ２８．５ｔ−ｍ 従来技術（３） 支衝部の座屈時の荷重 ： ８２ｔ 荷重再上昇時の歪み ： ４８％ 吸収エネルギー ： ３０．０ｔ−ｍExample Load at the time of buckling of the supporting portion: 81 t After buckling, the load re-raised almost over the constant load range and became equal to the load at the time of buckling. ): 52.5% Absorbed energy: 33.0 t-m Conventional technology (1) Load at the time of buckling of the support part: 68 t Strain at the time of reloading the load: 52.5% Absorbed energy: 28. 5t-m Conventional technology (2) Load at the time of buckling of the support part: 85t Strain at the time of reloading: 45% Absorbed energy: 28.5t-m Conventional technology (3) Load at the time of buckling of the support part : 82t load rises again when the strain: 48% absorbed energy: 3 0.0t-m
【００１６】[0016]
【発明の効果】以上詳細に説明をした本発明によると、
船舶が当接したときに発生する支衝部の座屈後のほぼ定
荷重となる領域の歪みを低下させることなく、座屈時の
荷重を上げることにより、吸収エネルギーを増大させる
ことができる効果を有する。その結果、従来より適用対
象となっていた船舶に対しては防舷材の小型化を図るこ
とが可能となり、また逆に従来と同径の場合には大型船
舶への適用が可能となるために適用対象船舶の範囲が拡
大することになる。According to the present invention described in detail above,
The effect that the absorbed energy can be increased by increasing the load at the time of buckling without lowering the strain in the area where the buckling of the support part occurs almost constant after buckling that occurs when the ship abuts. Having. As a result, it is possible to reduce the size of the fenders for ships that have been the target of application in the past, and conversely, it is possible to apply to large ships when the diameter is the same as before. Therefore, the range of vessels to be applied will be expanded.
【図１】実施例を示す側面図である。FIG. 1 is a side view showing an embodiment.
【図２】断面図である。FIG. 2 is a sectional view.
【図３】性能曲線図である。FIG. 3 is a performance curve diagram.
【図４】従来例を示す側面図である。FIG. 4 is a side view showing a conventional example.
【図５】断面図である。FIG. 5 is a sectional view.
２ 取り付け部 ３ 受衝部 ４ 支衝部 ５ 厚肉部 2 mounting part 3 receiving part 4 supporting part 5 thick part
Claims (1)
部に取り付け部を設け、径の小さい先部に受衝部を設け
てゴムにより全一体に構成した防舷材において、 支衝部の外面に、取り付け部および受衝部からそれぞれ
所定の距離をおいて所定の厚さの厚肉部を形成したこと
を特徴とする防舷材。A fender having a mounting portion provided on a large diameter base of a supporting portion of a tapered cylindrical body, and a receiving portion provided on a small diameter front portion, and integrally formed of rubber. A fender having a thick wall portion having a predetermined thickness formed at a predetermined distance from the mounting portion and the receiving portion on an outer surface of the collision portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5338514A JP2665138B2 (en) | 1993-12-28 | 1993-12-28 | Fender |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5338514A JP2665138B2 (en) | 1993-12-28 | 1993-12-28 | Fender |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07197431A JPH07197431A (en) | 1995-08-01 |
| JP2665138B2 true JP2665138B2 (en) | 1997-10-22 |
Family
ID=18318880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5338514A Expired - Lifetime JP2665138B2 (en) | 1993-12-28 | 1993-12-28 | Fender |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2665138B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4836708B2 (en) * | 2006-08-22 | 2011-12-14 | 倉敷化工株式会社 | Shock absorber |
| JP6648972B2 (en) | 2014-06-17 | 2020-02-19 | シバタ工業株式会社 | Method of manufacturing fender, quay and fender |
-
1993
- 1993-12-28 JP JP5338514A patent/JP2665138B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07197431A (en) | 1995-08-01 |
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