WO2013180116A1 - Hatch cover - Google Patents

Hatch cover Download PDF

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Publication number
WO2013180116A1
WO2013180116A1 PCT/JP2013/064748 JP2013064748W WO2013180116A1 WO 2013180116 A1 WO2013180116 A1 WO 2013180116A1 JP 2013064748 W JP2013064748 W JP 2013064748W WO 2013180116 A1 WO2013180116 A1 WO 2013180116A1
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WO
WIPO (PCT)
Prior art keywords
hatch cover
pressure resistance
wind pressure
hatch
side surfaces
Prior art date
Application number
PCT/JP2013/064748
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French (fr)
Japanese (ja)
Inventor
芦田琢磨
施建剛
関和隆
Original Assignee
常石造船株式会社
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 常石造船株式会社 filed Critical 常石造船株式会社
Priority to JP2014518674A priority Critical patent/JP5815857B2/en
Publication of WO2013180116A1 publication Critical patent/WO2013180116A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
    • B63B19/12—Hatches; Hatchways
    • B63B19/14—Hatch covers

Definitions

  • the present invention relates to a ship hatch cover.
  • a hatch is provided as an opening in the upper part of a hold such as a bulk carrier.
  • a hatch combing is provided around the hatch as a rising portion, and a hatch cover is placed on the hatch combing to cover the hatch.
  • FIG. 15 is a plan view showing a state in which the hatch cover 100 according to the conventional example is placed
  • FIG. 16 is a cross-sectional view taken along line AA in FIG.
  • FIG. 17 is a cross-sectional view taken along line BB in FIG.
  • a hatch combing 2 is provided as a rising portion around a hatch (not shown) in the upper opening of the ship's hold 8.
  • the upper end portion of the hatch combing 2 is bent toward the outer side of the peripheral edge portion to form a collar portion.
  • a hatch cover 100 is placed on the hatch combing 2 so that the hatch is covered.
  • the hatch cover 100 has a substantially rectangular shape in plan view, has a substantially rectangular parallelepiped shape as a whole, and four side surfaces are vertical surfaces.
  • the hatch cover 100 is located above the upper deck 7.
  • the hatch cover is generally divided, and there are a cover that slides forward and backward, left and right, and a cover that folds open.
  • Patent Document 1 discloses that a hatch cover is provided by providing an inclined surface on the periphery of a box-shaped hatch cover 12 having a trapezoidal cross section, and along the inclined surface of the hatch guide 11. It describes what can be used with any one of the 12 sides facing up.
  • Patent Document 2 discloses that the upper surface of the face plate 1 is formed into a mountain shape by forming the transformer material 9 ′ or the longi material 8 ′ attached on the face plate 1 of the hatch cover A into a mountain shape and covering it with the cover 11. It is formed to have a rainwater retention preventing function.
  • the four side surfaces are vertical surfaces and are located above the upper deck 7. Wind pressure resistance is generated by the wind on the side surface, causing fuel consumption deterioration and hull instability.
  • the inclined surface provided on the peripheral edge of the hatch cover 12 described in Patent Document 1 is provided along the inclined surface of the hatch guide 11 and does not receive wind at the inclined surface. It is not possible to reduce the wind pressure resistance of the wind applied to the side of the cover.
  • the present invention solves the above-described conventional problems, and reduces wind pressure resistance of the wind received on the side of the hatch cover during ship navigation, and suppresses fuel consumption deterioration and hull instability.
  • the hatch cover of the present invention is a hatch cover having a substantially rectangular shape in plan view placed on the hatch combing of a ship, and is provided on at least one of the four side surfaces that receive wind during ship navigation.
  • the wind pressure resistance reduction part which consists of at least one of an inclined surface and a level
  • the wind pressure resistance reducing portion is formed on all of the four side surfaces.
  • the hatch cover is provided with a corner cut to form a wind pressure resistance reducing portion.
  • the wind pressure resistance reduction portion is formed by attaching an additional object to the side surface of the hatch cover.
  • a step is provided between a side surface of the hatch cover and a side surface of the hatch combing to form a wind pressure resistance reducing portion.
  • the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship width direction among the four side surfaces.
  • the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship length direction among the four side surfaces.
  • At least one of the four side surfaces of the hatch cover having a substantially rectangular shape in plan view placed on the hatch coaming of the ship that receives wind during ship navigation is provided with at least one of the inclined surface and the step.
  • the wind pressure resistance reduction part which becomes is formed. Accordingly, it is possible to reduce the wind pressure resistance of the wind received on the side surface on which the wind pressure resistance reducing portion is formed, and to suppress the deterioration of fuel consumption and the hull instability.
  • the wind pressure resistance reducing portion is formed on all four side surfaces, the wind pressure resistance of the wind received from all directions can be effectively reduced.
  • the wind pressure resistance reduction portion is formed by providing a corner cut on the side surface of the hatch cover, it can be handled by shape processing of the newly installed hatch cover and is excellent in application to a new shipbuilding.
  • the wind pressure resistance reduction portion is formed by attaching an appendage to the side surface of the hatch cover, it can be applied to an existing hatch cover whose side surface is a vertical surface. Excellent application.
  • the step is provided between the side surface of the hatch cover and the side surface of the hatch combing to form the wind pressure resistance reducing portion, it is possible to reduce the wind pressure resistance including the side surface of the hatch combing.
  • the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship width direction among the four side surfaces, it is possible to effectively reduce the wind pressure resistance of the wind received especially from the front-rear direction of the ship. it can.
  • the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship length direction among the four side surfaces, the wind pressure resistance of the wind received from the left and right direction of the ship can be effectively reduced. .
  • the present invention it is possible to reduce the wind pressure resistance of the wind received on the side surface of the hatch cover during navigation of the ship, and to suppress deterioration in fuel consumption and instability of the hull.
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG.
  • FIG. 3 is a cross-sectional view taken along the line BB in FIG.
  • FIG. 10 is a sectional view taken along line AA in FIG. 9.
  • FIG. 10 is a sectional view taken along line BB in FIG. 9. It is a top view which shows the state which mounted the hatch cover which concerns on other embodiment.
  • FIG. 13 is a cross-sectional view taken along line AA in FIG. 12.
  • FIG. 13 is a sectional view taken along line BB in FIG. It is a top view which shows the state which mounted the hatch cover which concerns on a prior art example.
  • FIG. 16 is a cross-sectional view taken along line AA of FIG.
  • FIG. 16 is a sectional view taken along line BB in FIG.
  • FIGS. 1 to 3 is a plan view showing a state where the hatch cover 1 is placed
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1
  • FIG. 3 is a cross-sectional view taken along the line BB in FIG.
  • a hatch combing 2 is provided as a rising portion around the hatch (not shown) of the upper opening of the ship hold 8.
  • the upper end portion of the hatch combing 2 is bent toward the outer side of the peripheral edge portion to form a collar portion.
  • the hatch cover 1 is placed on the hatch combing 2 so that the hatch is covered.
  • the hatch cover 1 has a substantially rectangular shape in plan view, and has four side surfaces of a bow side, a stern side, a starboard side, and a port side.
  • the hatch cover 1 is located above the upper deck 7 and receives wind directly when navigating the ship.
  • the hatch cover is generally divided, and there are those that slide open front and rear and left and right, and those that open by folding, but the opening and closing structure is not particularly limited.
  • the wind pressure resistance reduction unit 3 On the four side surfaces of the hatch cover 1, the wind pressure resistance reduction unit 3 (the bow side), the wind pressure resistance reduction unit 4 (the stern side), the wind pressure resistance reduction unit 5 (the starboard side), and the wind pressure resistance reduction unit 6 (the port side), respectively. ) Is formed.
  • the wind pressure resistance reducing portions 3, 4, 5, and 6 are formed by providing corner cuts on the side surfaces of the hatch cover 1 to form inclined surfaces in FIGS. 1 to 3.
  • the hatch cover 1 placed on the ship's hatch coaming 2 has a substantially rectangular shape in plan view, and the four sides that receive wind during vessel navigation are all inclined from the inclined surface. Wind pressure resistance reduction portions 3, 4, 5, and 6 are formed. Therefore, it is possible to reduce the wind pressure resistance of the wind received on the side surface on which the wind pressure resistance reduction units 3, 4, 5, 6 are formed, and to suppress the deterioration of fuel consumption and the hull instability.
  • wind pressure resistance reduction portions 3, 4, 5, and 6 are formed on all four side surfaces, wind pressure resistance of wind received from all directions can be effectively reduced.
  • FIG. 4 is an enlarged view showing the wind pressure resistance reduction portion of the hatch cover 10, in which a corner cut is provided on the side surface of the hatch cover 10 to form the wind pressure resistance reduction portion.
  • the wind pressure resistance reducing unit shown in FIG. 4A is a unit in which a straight corner 11 is provided at the upper corner of the side surface of the hatch cover 10 to form a linear inclined surface.
  • the wind pressure resistance reducing unit shown in FIG. 4B is formed by providing a stepped corner cut 12 at a corner of the upper side of the hatch cover 10 to form a step.
  • the wind pressure resistance reducing unit shown in FIG. 4C is formed by providing a curved cornered surface 13 at the upper corner of the hatch cover 10 to form a curved inclined surface.
  • the wind pressure resistance reducing portion shown in FIG. 4D is formed by providing a gently curved corner cut 14 at the corner of the upper side surface of the hatch cover 10 to form a gently curved inclined surface.
  • FIG. 5 is an enlarged view showing the wind pressure resistance reducing portion of the hatch cover 20, and an appendage having a triangular cross section is attached to the side surface of the hatch cover 20 to form the wind pressure resistance reducing portion.
  • the wind pressure resistance reducing unit shown in FIG. 5A is formed by attaching a triangle-shaped appendage 21 to the entire side surface of the hatch cover 20 to form a linear inclined surface.
  • the wind pressure resistance reducing portion shown in FIG. 5B is formed by attaching an appendage 22 having a triangular cross section to the central portion of the side surface of the hatch cover 20 to form a linear inclined surface and a step.
  • FIG. 6 is an enlarged view showing the wind pressure resistance reduction portion of the hatch cover 20, and an appendage having a square cross section is attached to the side surface of the hatch cover 20 to form the wind pressure resistance reduction portion.
  • the wind pressure resistance reducing portion shown in FIG. 6A is obtained by attaching a step 23 by attaching an appendage 23 having a square cross section to the lower side of the hatch cover 20.
  • the wind pressure resistance reducing portion shown in FIG. 6B is formed by attaching a step 24 by attaching an appendage 24 having a square cross section to the center of the side surface of the hatch cover 20.
  • FIG. 7 is an enlarged view showing the wind pressure resistance reduction portion of the hatch cover 20, in which an appendage having a curved cross section is attached to the side surface of the hatch cover 20 to form the wind pressure resistance reduction portion.
  • the wind pressure resistance reducing unit shown in FIG. 7A is formed by attaching an appendage 25 having a curved cross section to the entire side surface of the hatch cover 20 to form a curved inclined surface.
  • the wind pressure resistance reduction portion shown in FIG. 7B is obtained by attaching an appendage 26 having a curved cross section to the center of the side surface of the hatch cover 20 to form a curved inclined surface and a step.
  • the wind pressure resistance reducing portion shown in FIG. 7C is obtained by attaching an appendage 27 having a curved cross section to the center of the side surface of the hatch cover 20 to form a curved inclined surface and a step.
  • FIG. 8 is an enlarged view showing the wind pressure resistance reducing portion of the hatch cover 30, and a step is provided between the side surface of the hatch cover 30 and the side surface of the hatch combing 2 to form the wind pressure resistance reducing portion.
  • the wind pressure resistance reduction unit shown in FIG. 8A is configured such that the side surface of the hatch cover 30 is retracted inward (right side in FIG. 8) from the side surface of the hatch combing 2, thereby The step 31 is formed between the side surfaces of the two.
  • the wind pressure resistance reduction unit shown in FIG. 8B attaches an appendage 33 having a square cross section to the side surface of the hatch combing 2 to form a step 32 between the side surface of the hatch cover 30 and the side surface of the hatch combing 2. It is a thing.
  • the wind pressure resistance reduction including the side surface of the hatch combing 2 is achieved. Is possible.
  • the wind pressure resistance reduction unit is formed on all four side surfaces that receive wind during vessel navigation.
  • the present invention is not limited to this, and it is formed on at least one of the four side surfaces.
  • the wind pressure resistance of the wind received on the side surface on which the wind pressure resistance reducing portion is formed can be reduced.
  • FIGS. 9 to 11 show a hatch cover in which wind pressure resistance reducing portions 3 and 4 are formed on only two side surfaces (the bow side and the stern side) parallel to the ship width direction among the four side surfaces.
  • 9 is a plan view
  • FIG. 10 is a sectional view taken along line AA in FIG. 9
  • FIG. 11 is a sectional view taken along line BB in FIG.
  • the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship width direction among the four side surfaces, so that the wind pressure resistance of the wind received from the front-rear direction of the ship is effectively reduced. Can be reduced.
  • FIG. 12 to 14 show a hatch cover in which wind pressure resistance reducing portions 5 and 6 are formed only on two side surfaces (starboard side and port side) parallel to the ship length direction among the four side surfaces, 12 is a plan view, FIG. 13 is a sectional view taken along line AA in FIG. 12, and FIG. 14 is a sectional view taken along line BB in FIG.
  • the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship length direction among the four side surfaces, thereby effectively reducing the wind pressure resistance of the wind received from the left and right directions of the ship. can do.
  • Table 1 shows the results of the CFD simulation.
  • the hatch cover according to the present embodiment it is possible to reduce the wind pressure resistance of the wind received on the side surface of the hatch cover during ship navigation, and to suppress the deterioration of fuel consumption and the hull instability.

Abstract

The purpose of the invention is to reduce wind pressure resistance of wind blowing against the side surface of a hatch cover when a ship is sailing, and to suppress hull instability and any worsening of fuel consumption. In a hatch cover (1) that is substantially rectangular in a plan view and placed on a hatch coaming (2) of a ship, wind pressure resistance reducing sections (3, 4, 5, 6) composed of inclined surfaces and/or ledges are formed in at least one of the four side surfaces against which wind blows when the ship is sailing. The wind pressure resistance reducing sections (3, 4, 5, 6) are preferably formed on all four side surfaces. The wind pressure resistance reducing sections (3, 4, 5, 6) are formed by a method for cutting the corners of the side surfaces of the hatch cover (1), a method for attaching additions to the side surfaces of the hatch cover (1), and a method for providing ledges between the side surfaces of the hatch cover (1) and the side surfaces of the hatch coaming (2).

Description

ハッチカバーHatch cover
　本発明は、船舶のハッチカバーに関するものである。 The present invention relates to a ship hatch cover.
　従来、ばら積貨物船等の船倉の上部には、開口部としてハッチが設けられている。そして、ハッチの周囲には立ち上がり部としてハッチコーミングが設けられ、ハッチコーミングの上にハッチカバーが載置されて蓋がされるようになっている。 Conventionally, a hatch is provided as an opening in the upper part of a hold such as a bulk carrier. A hatch combing is provided around the hatch as a rising portion, and a hatch cover is placed on the hatch combing to cover the hatch.
　図１５は、従来例に係るハッチカバー１００を載置した状態を示す平面図であり、図１６は図１５のＡ－Ａ断面図、図１７は図１５のＢ－Ｂ断面図である。図１５乃至図１７に示すように、船舶の船倉８の上部開口部のハッチ（図示しない）の周囲には、立ち上がり部としてハッチコーミング２が設けられている。ハッチコーミング２の上端部は周縁部外側に向かって折曲されて鍔部が形成されている。そして、ハッチカバー１００がハッチコーミング２の上に載置されて、ハッチに蓋がされるようになっている。 15 is a plan view showing a state in which the hatch cover 100 according to the conventional example is placed, FIG. 16 is a cross-sectional view taken along line AA in FIG. 15, and FIG. 17 is a cross-sectional view taken along line BB in FIG. As shown in FIGS. 15 to 17, a hatch combing 2 is provided as a rising portion around a hatch (not shown) in the upper opening of the ship's hold 8. The upper end portion of the hatch combing 2 is bent toward the outer side of the peripheral edge portion to form a collar portion. A hatch cover 100 is placed on the hatch combing 2 so that the hatch is covered.
　ハッチカバー１００は平面視略矩形状であり、全体として略直方体形状であって、４つの側面は垂直面となっている。また、ハッチカバー１００は、上甲板７よりも上方に位置している。なお、図示していないが、一般的にハッチカバーは分割されており、前後や左右にスライドして開くものや、折り畳んで開くものなどがある。 The hatch cover 100 has a substantially rectangular shape in plan view, has a substantially rectangular parallelepiped shape as a whole, and four side surfaces are vertical surfaces. The hatch cover 100 is located above the upper deck 7. Although not shown, the hatch cover is generally divided, and there are a cover that slides forward and backward, left and right, and a cover that folds open.
　一方、ハッチカバーの形状に関する発明として、特許文献１には、台形の横断面を持つ箱型のハッチカバー１２の周縁に傾斜面を設け、ハッチガイド１１の傾斜面に沿わせることにより、ハッチカバー１２の両面のいずれか任意の面を上にして使用できるようにしたものが記載されている。また、特許文献２には、ハッチカバーＡの面板１上に取り付けられたトランス材９´またはロンジ材８´を山形状に形成してカバー１１で覆うことにより、面板１の上面を山形状に形成して、雨水滞留防止機能を有するようにしたものが記載されている。 On the other hand, as an invention related to the shape of a hatch cover, Patent Document 1 discloses that a hatch cover is provided by providing an inclined surface on the periphery of a box-shaped hatch cover 12 having a trapezoidal cross section, and along the inclined surface of the hatch guide 11. It describes what can be used with any one of the 12 sides facing up. Further, Patent Document 2 discloses that the upper surface of the face plate 1 is formed into a mountain shape by forming the transformer material 9 ′ or the longi material 8 ′ attached on the face plate 1 of the hatch cover A into a mountain shape and covering it with the cover 11. It is formed to have a rainwater retention preventing function.
実開昭５９－１９５０９０号公報Japanese Utility Model Publication No. 59-195090 実開昭６２－３０９９３号公報Japanese Utility Model Publication No. 62-30993
　しかしながら、図１５乃至図１７に示す従来例に係るハッチカバー１００の場合、４つの側面が垂直面となっており、また上甲板７よりも上方に位置しているので、船舶航行時にハッチカバーの側面に風を受けて風圧抵抗が生じ、燃費悪化や船体不安定化の要因となっている。 However, in the case of the hatch cover 100 according to the conventional example shown in FIGS. 15 to 17, the four side surfaces are vertical surfaces and are located above the upper deck 7. Wind pressure resistance is generated by the wind on the side surface, causing fuel consumption deterioration and hull instability.
　一方、特許文献１に記載されたハッチカバー１２の周縁に設けられた傾斜面は、ハッチガイド１１の傾斜面に沿わせるためのものであり、この傾斜面で風を受けるわけではないため、ハッチカバーの側面に受ける風の風圧抵抗を低減することはできない。 On the other hand, the inclined surface provided on the peripheral edge of the hatch cover 12 described in Patent Document 1 is provided along the inclined surface of the hatch guide 11 and does not receive wind at the inclined surface. It is not possible to reduce the wind pressure resistance of the wind applied to the side of the cover.
　また、特許文献２に記載された面板１の上面は山形状に形成されているが、側面は垂直であるため、ハッチカバーの側面に受ける風の風圧抵抗を低減することはできない。 Further, although the upper surface of the face plate 1 described in Patent Document 2 is formed in a mountain shape, since the side surface is vertical, the wind pressure resistance of the wind received on the side surface of the hatch cover cannot be reduced.
　本発明は、上記従来の課題を解決するものであり、船舶航行時にハッチカバーの側面に受ける風の風圧抵抗を低減し、燃費悪化や船体不安定化を抑制するものである。 The present invention solves the above-described conventional problems, and reduces wind pressure resistance of the wind received on the side of the hatch cover during ship navigation, and suppresses fuel consumption deterioration and hull instability.
　上記課題を解決するため、本発明のハッチカバーは、船舶のハッチコーミング上に載置される平面視略矩形状のハッチカバーであって、船舶航行時に風を受ける４つの側面の少なくとも１つに、傾斜面及び段差の少なくとも１つからなる風圧抵抗低減部を形成したことを特徴とする。 In order to solve the above problems, the hatch cover of the present invention is a hatch cover having a substantially rectangular shape in plan view placed on the hatch combing of a ship, and is provided on at least one of the four side surfaces that receive wind during ship navigation. The wind pressure resistance reduction part which consists of at least one of an inclined surface and a level | step difference is formed.
　また好ましくは、前記風圧抵抗低減部を、前記４つの側面のすべてに形成したことを特徴とする。 Also preferably, the wind pressure resistance reducing portion is formed on all of the four side surfaces.
　また好ましくは、前記ハッチカバーの側面に隅切りを設けて、風圧抵抗低減部を形成したことを特徴とする。 Also preferably, the hatch cover is provided with a corner cut to form a wind pressure resistance reducing portion.
　また好ましくは、前記ハッチカバーの側面に付加物を取り付けて、風圧抵抗低減部を形成したことを特徴とする。 Also preferably, the wind pressure resistance reduction portion is formed by attaching an additional object to the side surface of the hatch cover.
　また好ましくは、前記ハッチカバーの側面と前記ハッチコーミングの側面との間に段差を設けて、風圧抵抗低減部を形成したことを特徴とする。 Preferably, a step is provided between a side surface of the hatch cover and a side surface of the hatch combing to form a wind pressure resistance reducing portion.
　また好ましくは、前記風圧抵抗低減部を、前記４つの側面のうち船幅方向に平行な２つの側面に形成したことを特徴とする。 Also preferably, the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship width direction among the four side surfaces.
　また好ましくは、前記風圧抵抗低減部を、前記４つの側面のうち船長方向に平行な２つの側面に形成したことを特徴とする。 Also preferably, the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship length direction among the four side surfaces.
　本発明によれば、船舶のハッチコーミング上に載置される平面視略矩形状のハッチカバーの、船舶航行時に風を受ける４つの側面の少なくとも１つに、傾斜面及び段差の少なくとも１つからなる風圧抵抗低減部を形成してある。従って、風圧抵抗低減部を形成した側面に受ける風の風圧抵抗を低減し、燃費悪化や船体不安定化を抑制することができる。 According to the present invention, at least one of the four side surfaces of the hatch cover having a substantially rectangular shape in plan view placed on the hatch coaming of the ship that receives wind during ship navigation is provided with at least one of the inclined surface and the step. The wind pressure resistance reduction part which becomes is formed. Accordingly, it is possible to reduce the wind pressure resistance of the wind received on the side surface on which the wind pressure resistance reducing portion is formed, and to suppress the deterioration of fuel consumption and the hull instability.
　また本発明によれば、風圧抵抗低減部を４つの側面のすべてに形成したので、あらゆる方向から受ける風の風圧抵抗を効果的に低減することができる。 Further, according to the present invention, since the wind pressure resistance reducing portion is formed on all four side surfaces, the wind pressure resistance of the wind received from all directions can be effectively reduced.
　また本発明によれば、ハッチカバーの側面に隅切りを設けて、風圧抵抗低減部を形成したので、新設のハッチカバーの形状加工により対応可能であり、新造船への適用に優れている。 Further, according to the present invention, since the wind pressure resistance reduction portion is formed by providing a corner cut on the side surface of the hatch cover, it can be handled by shape processing of the newly installed hatch cover and is excellent in application to a new shipbuilding.
　また本発明によれば、ハッチカバーの側面に付加物を取り付けて、風圧抵抗低減部を形成したので、側面が垂直面となっている既設のハッチカバーにも対応可能であり、既存船への適用に優れている。 In addition, according to the present invention, since the wind pressure resistance reduction portion is formed by attaching an appendage to the side surface of the hatch cover, it can be applied to an existing hatch cover whose side surface is a vertical surface. Excellent application.
　また本発明によれば、ハッチカバーの側面とハッチコーミングの側面との間に段差を設けて、風圧抵抗低減部を形成したので、ハッチコーミングの側面を含めた風圧抵抗軽減が可能である。 Further, according to the present invention, since the step is provided between the side surface of the hatch cover and the side surface of the hatch combing to form the wind pressure resistance reducing portion, it is possible to reduce the wind pressure resistance including the side surface of the hatch combing.
　また本発明によれば、風圧抵抗低減部を４つの側面のうち船幅方向に平行な２つの側面に形成したので、特に船舶の前後方向から受ける風の風圧抵抗を効果的に低減することができる。 Further, according to the present invention, since the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship width direction among the four side surfaces, it is possible to effectively reduce the wind pressure resistance of the wind received especially from the front-rear direction of the ship. it can.
　また本発明によれば、風圧抵抗低減部を４つの側面のうち船長方向に平行な２つの側面に形成したので、特に船舶の左右方向から受ける風の風圧抵抗を効果的に低減することができる。 Further, according to the present invention, since the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship length direction among the four side surfaces, the wind pressure resistance of the wind received from the left and right direction of the ship can be effectively reduced. .
　以上、本発明によれば、船舶航行時にハッチカバーの側面に受ける風の風圧抵抗を低減し、燃費悪化や船体不安定化を抑制することができる。 As described above, according to the present invention, it is possible to reduce the wind pressure resistance of the wind received on the side surface of the hatch cover during navigation of the ship, and to suppress deterioration in fuel consumption and instability of the hull.
本発明の実施形態に係るハッチカバーを載置した状態を示す平面図である。It is a top view which shows the state which mounted the hatch cover which concerns on embodiment of this invention. 図１のＡ－Ａ断面図である。FIG. 2 is a cross-sectional view taken along the line AA in FIG. 図１のＢ－Ｂ断面図である。FIG. 3 is a cross-sectional view taken along the line BB in FIG. ハッチカバーの風圧抵抗低減部を示す拡大図である。It is an enlarged view which shows the wind pressure resistance reduction part of a hatch cover. ハッチカバーの風圧抵抗低減部を示す拡大図である。It is an enlarged view which shows the wind pressure resistance reduction part of a hatch cover. ハッチカバーの風圧抵抗低減部を示す拡大図である。It is an enlarged view which shows the wind pressure resistance reduction part of a hatch cover. ハッチカバーの風圧抵抗低減部を示す拡大図である。It is an enlarged view which shows the wind pressure resistance reduction part of a hatch cover. ハッチカバーの風圧抵抗低減部を示す拡大図である。It is an enlarged view which shows the wind pressure resistance reduction part of a hatch cover. 他の実施形態に係るハッチカバーを載置した状態を示す平面図である。It is a top view which shows the state which mounted the hatch cover which concerns on other embodiment. 図９のＡ－Ａ断面図である。FIG. 10 is a sectional view taken along line AA in FIG. 9. 図９のＢ－Ｂ断面図である。FIG. 10 is a sectional view taken along line BB in FIG. 9. 他の実施形態に係るハッチカバーを載置した状態を示す平面図である。It is a top view which shows the state which mounted the hatch cover which concerns on other embodiment. 図１２のＡ－Ａ断面図である。FIG. 13 is a cross-sectional view taken along line AA in FIG. 12. 図１２のＢ－Ｂ断面図である。FIG. 13 is a sectional view taken along line BB in FIG. 従来例に係るハッチカバーを載置した状態を示す平面図である。It is a top view which shows the state which mounted the hatch cover which concerns on a prior art example. 図１５のＡ－Ａ断面図である。FIG. 16 is a cross-sectional view taken along line AA of FIG. 図１５のＢ－Ｂ断面図である。FIG. 16 is a sectional view taken along line BB in FIG.
　次に、図１乃至図８を参照して、本発明の実施形態に係るハッチカバーについて説明する。最初に、図１乃至図３を参照して、本実施形態に係るハッチカバー１の全体構造について説明する。図１は、ハッチカバー１を載置した状態を示す平面図であり、図２は図１のＡ－Ａ断面図、図３は図１のＢ－Ｂ断面図である。 Next, the hatch cover according to the embodiment of the present invention will be described with reference to FIGS. First, the overall structure of the hatch cover 1 according to this embodiment will be described with reference to FIGS. 1 to 3. 1 is a plan view showing a state where the hatch cover 1 is placed, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB in FIG.
　船舶の船倉８の上部開口部のハッチ（図示しない）の周囲には、立ち上がり部としてハッチコーミング２が設けられている。ハッチコーミング２の上端部は周縁部外側に向かって折曲されて鍔部が形成されている。そして、ハッチカバー１がハッチコーミング２の上に載置されて、ハッチに蓋がされるようになっている。 A hatch combing 2 is provided as a rising portion around the hatch (not shown) of the upper opening of the ship hold 8. The upper end portion of the hatch combing 2 is bent toward the outer side of the peripheral edge portion to form a collar portion. The hatch cover 1 is placed on the hatch combing 2 so that the hatch is covered.
　ハッチカバー１は平面視略矩形状であり、船首側、船尾側、右舷側及び左舷側の４つの側面を有している。また、ハッチカバー１は、上甲板７よりも上方に位置しており、船舶航行時に風を直接受けるようになっている。なお、図示していないが、一般的にハッチカバーは分割されており、前後や左右にスライドして開くものや、折り畳んで開くものなどがあるが、開閉構造は特に限定されない。 The hatch cover 1 has a substantially rectangular shape in plan view, and has four side surfaces of a bow side, a stern side, a starboard side, and a port side. The hatch cover 1 is located above the upper deck 7 and receives wind directly when navigating the ship. Although not shown in the drawings, the hatch cover is generally divided, and there are those that slide open front and rear and left and right, and those that open by folding, but the opening and closing structure is not particularly limited.
　ハッチカバー１の４つの側面にはそれぞれ、風圧抵抗低減部３（船首側）、風圧抵抗低減部４（船尾側）、風圧抵抗低減部５（右舷側）、及び風圧抵抗低減部６（左舷側）が形成されている。風圧抵抗低減部３，４，５，６は、図１乃至図３においてはハッチカバー１の側面に、隅切りを設けて傾斜面とすることにより形成されている。 On the four side surfaces of the hatch cover 1, the wind pressure resistance reduction unit 3 (the bow side), the wind pressure resistance reduction unit 4 (the stern side), the wind pressure resistance reduction unit 5 (the starboard side), and the wind pressure resistance reduction unit 6 (the port side), respectively. ) Is formed. The wind pressure resistance reducing portions 3, 4, 5, and 6 are formed by providing corner cuts on the side surfaces of the hatch cover 1 to form inclined surfaces in FIGS. 1 to 3.
　本実施形態に係るハッチカバー１によれば、船舶のハッチコーミング２上に載置される平面視略矩形状のハッチカバー１の、船舶航行時に風を受ける４つの側面のすべてに、傾斜面からなる風圧抵抗低減部３，４，５，６を形成してある。従って、風圧抵抗低減部３，４，５，６を形成した側面に受ける風の風圧抵抗を低減し、燃費悪化や船体不安定化を抑制することができる。 According to the hatch cover 1 according to the present embodiment, the hatch cover 1 placed on the ship's hatch coaming 2 has a substantially rectangular shape in plan view, and the four sides that receive wind during vessel navigation are all inclined from the inclined surface. Wind pressure resistance reduction portions 3, 4, 5, and 6 are formed. Therefore, it is possible to reduce the wind pressure resistance of the wind received on the side surface on which the wind pressure resistance reduction units 3, 4, 5, 6 are formed, and to suppress the deterioration of fuel consumption and the hull instability.
　また、風圧抵抗低減部３，４，５，６を４つの側面のすべてに形成したので、あらゆる方向から受ける風の風圧抵抗を効果的に低減することができる。 Moreover, since the wind pressure resistance reduction portions 3, 4, 5, and 6 are formed on all four side surfaces, wind pressure resistance of wind received from all directions can be effectively reduced.
　ここで、風圧抵抗低減部３，４，５，６の形成方法としては、傾斜面、段差、傾斜面と段差の組み合わせがある。以下、図４乃至図８を参照して、風圧抵抗低減部の形成方法について説明する。 Here, as a method of forming the wind pressure resistance reducing portions 3, 4, 5, and 6, there are an inclined surface, a step, and a combination of the inclined surface and the step. Hereinafter, a method of forming the wind pressure resistance reduction unit will be described with reference to FIGS.
　図４は、ハッチカバー１０の風圧抵抗低減部を示す拡大図であり、ハッチカバー１０の側面に隅切りを設けて、風圧抵抗低減部を形成したものである。このうち図４（ａ）に示す風圧抵抗低減部は、ハッチカバー１０の側面上部の角に直線状の隅切り１１を設けて直線状の傾斜面を形成したものである。また図４（ｂ）に示す風圧抵抗低減部は、ハッチカバー１０の側面上部の角に階段状の隅切り１２を設けて段差を形成したものである。また図４（ｃ）に示す風圧抵抗低減部は、ハッチカバー１０の側面上部の角に曲線状の隅切り１３を設けて曲線状の傾斜面を形成したものである。また図４（ｄ）に示す風圧抵抗低減部は、ハッチカバー１０の側面上部の角に緩やかな曲線状の隅切り１４を設けて緩やかな曲線状の傾斜面を形成したものである。 FIG. 4 is an enlarged view showing the wind pressure resistance reduction portion of the hatch cover 10, in which a corner cut is provided on the side surface of the hatch cover 10 to form the wind pressure resistance reduction portion. Of these, the wind pressure resistance reducing unit shown in FIG. 4A is a unit in which a straight corner 11 is provided at the upper corner of the side surface of the hatch cover 10 to form a linear inclined surface. Further, the wind pressure resistance reducing unit shown in FIG. 4B is formed by providing a stepped corner cut 12 at a corner of the upper side of the hatch cover 10 to form a step. Further, the wind pressure resistance reducing unit shown in FIG. 4C is formed by providing a curved cornered surface 13 at the upper corner of the hatch cover 10 to form a curved inclined surface. Further, the wind pressure resistance reducing portion shown in FIG. 4D is formed by providing a gently curved corner cut 14 at the corner of the upper side surface of the hatch cover 10 to form a gently curved inclined surface.
　図４に示すように、ハッチカバー１０の側面に隅切りを設けて、風圧抵抗低減部を形成する方法によれば、新設のハッチカバーの形状加工により対応可能であり、新造船への適用に優れている。 As shown in FIG. 4, according to the method of forming the wind pressure resistance reduction portion by providing a corner cut in the side surface of the hatch cover 10, it is possible to cope with the shape processing of the newly installed hatch cover, and it can be applied to new shipbuilding. Are better.
　図５は、ハッチカバー２０の風圧抵抗低減部を示す拡大図であり、ハッチカバー２０の側面に断面三角形状の付加物を取り付けて、風圧抵抗低減部を形成したものである。このうち図５（ａ）に示す風圧抵抗低減部は、ハッチカバー２０の側面全体に断面三角形状の付加物２１を取り付けて、直線状の傾斜面を形成したものである。また図５（ｂ）に示す風圧抵抗低減部は、ハッチカバー２０の側面中央部に断面三角形状の付加物２２を取り付けて、直線状の傾斜面と段差を形成したものである。 FIG. 5 is an enlarged view showing the wind pressure resistance reducing portion of the hatch cover 20, and an appendage having a triangular cross section is attached to the side surface of the hatch cover 20 to form the wind pressure resistance reducing portion. Of these, the wind pressure resistance reducing unit shown in FIG. 5A is formed by attaching a triangle-shaped appendage 21 to the entire side surface of the hatch cover 20 to form a linear inclined surface. Further, the wind pressure resistance reducing portion shown in FIG. 5B is formed by attaching an appendage 22 having a triangular cross section to the central portion of the side surface of the hatch cover 20 to form a linear inclined surface and a step.
　図６は、ハッチカバー２０の風圧抵抗低減部を示す拡大図であり、ハッチカバー２０の側面に断面四角形状の付加物を取り付けて、風圧抵抗低減部を形成したものである。このうち図６（ａ）に示す風圧抵抗低減部は、ハッチカバー２０の側面下部に断面四角形状の付加物２３を取り付けて、段差を形成したものである。また図６（ｂ）に示す風圧抵抗低減部は、ハッチカバー２０の側面中央部に断面四角形状の付加物２４を取り付けて、段差を形成したものである。 FIG. 6 is an enlarged view showing the wind pressure resistance reduction portion of the hatch cover 20, and an appendage having a square cross section is attached to the side surface of the hatch cover 20 to form the wind pressure resistance reduction portion. Among these, the wind pressure resistance reducing portion shown in FIG. 6A is obtained by attaching a step 23 by attaching an appendage 23 having a square cross section to the lower side of the hatch cover 20. Further, the wind pressure resistance reducing portion shown in FIG. 6B is formed by attaching a step 24 by attaching an appendage 24 having a square cross section to the center of the side surface of the hatch cover 20.
　図７は、ハッチカバー２０の風圧抵抗低減部を示す拡大図であり、ハッチカバー２０の側面に曲線状の断面を有する付加物を取り付けて、風圧抵抗低減部を形成したものである。このうち図７（ａ）に示す風圧抵抗低減部は、ハッチカバー２０の側面全体に曲線状の断面を有する付加物２５を取り付けて、曲線状の傾斜面を形成したものである。また図７（ｂ）に示す風圧抵抗低減部は、ハッチカバー２０の側面中央部に曲線状の断面を有する付加物２６を取り付けて、曲線状の傾斜面と段差を形成したものである。また図７（ｃ）に示す風圧抵抗低減部は、ハッチカバー２０の側面中央部に曲線状の断面を有する付加物２７を取り付けて、曲線状の傾斜面と段差を形成したものである。 FIG. 7 is an enlarged view showing the wind pressure resistance reduction portion of the hatch cover 20, in which an appendage having a curved cross section is attached to the side surface of the hatch cover 20 to form the wind pressure resistance reduction portion. Among these, the wind pressure resistance reducing unit shown in FIG. 7A is formed by attaching an appendage 25 having a curved cross section to the entire side surface of the hatch cover 20 to form a curved inclined surface. In addition, the wind pressure resistance reduction portion shown in FIG. 7B is obtained by attaching an appendage 26 having a curved cross section to the center of the side surface of the hatch cover 20 to form a curved inclined surface and a step. The wind pressure resistance reducing portion shown in FIG. 7C is obtained by attaching an appendage 27 having a curved cross section to the center of the side surface of the hatch cover 20 to form a curved inclined surface and a step.
　図５乃至図７に示すように、ハッチカバー２０の側面に付加物を取り付けて、風圧抵抗低減部を形成する方法によれば、側面が垂直面となっている既設のハッチカバーにも対応可能であり、既存船への適用に優れている。 As shown in FIGS. 5 to 7, according to the method of attaching an appendage to the side surface of the hatch cover 20 and forming the wind pressure resistance reduction portion, it is possible to deal with an existing hatch cover whose side surface is a vertical surface. It is excellent in application to existing ships.
　図８は、ハッチカバー３０の風圧抵抗低減部を示す拡大図であり、ハッチカバー３０の側面とハッチコーミング２の側面との間に段差を設けて、風圧抵抗低減部を形成したものである。このうち図８（ａ）に示す風圧抵抗低減部は、ハッチカバー３０の側面をハッチコーミング２の側面よりも内側（図８における右側）に引っ込ませることにより、ハッチカバー３０の側面とハッチコーミング２の側面との間に段差３１を形成したものである。また図８（ｂ）に示す風圧抵抗低減部は、ハッチコーミング２の側面に断面四角形状の付加物３３を取り付けて、ハッチカバー３０の側面とハッチコーミング２の側面との間に段差３２を形成したものである。 FIG. 8 is an enlarged view showing the wind pressure resistance reducing portion of the hatch cover 30, and a step is provided between the side surface of the hatch cover 30 and the side surface of the hatch combing 2 to form the wind pressure resistance reducing portion. Of these, the wind pressure resistance reduction unit shown in FIG. 8A is configured such that the side surface of the hatch cover 30 is retracted inward (right side in FIG. 8) from the side surface of the hatch combing 2, thereby The step 31 is formed between the side surfaces of the two. In addition, the wind pressure resistance reduction unit shown in FIG. 8B attaches an appendage 33 having a square cross section to the side surface of the hatch combing 2 to form a step 32 between the side surface of the hatch cover 30 and the side surface of the hatch combing 2. It is a thing.
　図８に示すように、ハッチカバー３０の側面とハッチコーミング２の側面との間に段差を設けて、風圧抵抗低減部を形成する方法によれば、ハッチコーミング２の側面を含めた風圧抵抗軽減が可能である。 As shown in FIG. 8, according to the method of providing the step between the side surface of the hatch cover 30 and the side surface of the hatch combing 2 to form the wind pressure resistance reduction portion, the wind pressure resistance reduction including the side surface of the hatch combing 2 is achieved. Is possible.
　なお、上記実施形態においては、船舶航行時に風を受ける４つの側面のすべてに風圧抵抗低減部を形成したが、これに限定されるものではなく、４つの側面の少なくとも１つに形成することにより、風圧抵抗低減部を形成した側面に受ける風の風圧抵抗を低減することができる。 In the above embodiment, the wind pressure resistance reduction unit is formed on all four side surfaces that receive wind during vessel navigation. However, the present invention is not limited to this, and it is formed on at least one of the four side surfaces. The wind pressure resistance of the wind received on the side surface on which the wind pressure resistance reducing portion is formed can be reduced.
　例えば、図９乃至図１１は、４つの側面のうち船幅方向に平行な２つの側面（船首側と船尾側）のみに、風圧抵抗低減部３，４を形成したハッチカバーを示すものであり、図９は平面図、図１０は図９のＡ－Ａ断面図、図１１は図９のＢ－Ｂ断面図である。 For example, FIGS. 9 to 11 show a hatch cover in which wind pressure resistance reducing portions 3 and 4 are formed on only two side surfaces (the bow side and the stern side) parallel to the ship width direction among the four side surfaces. 9 is a plan view, FIG. 10 is a sectional view taken along line AA in FIG. 9, and FIG. 11 is a sectional view taken along line BB in FIG.
　図９乃至図１１に示すように、風圧抵抗低減部を４つの側面のうち船幅方向に平行な２つの側面に形成することにより、特に船舶の前後方向から受ける風の風圧抵抗を効果的に低減することができる。 As shown in FIGS. 9 to 11, the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship width direction among the four side surfaces, so that the wind pressure resistance of the wind received from the front-rear direction of the ship is effectively reduced. Can be reduced.
　また、図１２乃至図１４は、４つの側面のうち船長方向に平行な２つの側面（右舷側と左舷側）のみに、風圧抵抗低減部５，６を形成したハッチカバーを示すものであり、図１２は平面図、図１３は図１２のＡ－Ａ断面図、図１４は図１２のＢ－Ｂ断面図である。 12 to 14 show a hatch cover in which wind pressure resistance reducing portions 5 and 6 are formed only on two side surfaces (starboard side and port side) parallel to the ship length direction among the four side surfaces, 12 is a plan view, FIG. 13 is a sectional view taken along line AA in FIG. 12, and FIG. 14 is a sectional view taken along line BB in FIG.
　図１２乃至図１４に示すように、風圧抵抗低減部を４つの側面のうち船長方向に平行な２つの側面に形成することにより、特に船舶の左右方向から受ける風の風圧抵抗を効果的に低減することができる。 As shown in FIGS. 12 to 14, the wind pressure resistance reducing portion is formed on two side surfaces parallel to the ship length direction among the four side surfaces, thereby effectively reducing the wind pressure resistance of the wind received from the left and right directions of the ship. can do.
　以下、本実施形態に係るハッチカバーによる風圧抵抗低減効果に関するＣＦＤシミュレーション結果について説明する。ＣＦＤシミュレーションの条件は、以下の通りである。 Hereinafter, the CFD simulation result regarding the wind pressure resistance reduction effect by the hatch cover according to the present embodiment will be described. The conditions for the CFD simulation are as follows.
　ハッチカバーサイズ：Ｌ×Ｂ×Ｈ＝１６．９６０×１９．７００×１．９００（ｍ）
　　　　　　　　　　　（Ｈはハッチコーミングを含む高さで設定した。）
　比較例の隅切りサイズ：なし
　実施例の隅切りサイズ：２２５×２２５（ｍｍ）の三角隅切り
　風向：水平面上とし、長さ方向（Ｘ軸）に対する角度＝０°及び４５°を実施した。
　風速：７．７１ｍ／ｓ
　境界条件：Ｚ＝０（ハッチ下端）平面における流速は０とした。（デッキを想定） Hatch cover size: L x B x H = 16.960 x 19.700 x 1.900 (m)
(H was set at a height including hatch combing.)
Corner size of comparative example: None Corner size of example: Triangular corner cutting of 225 × 225 (mm) Wind direction: On a horizontal plane, angles with respect to the length direction (X axis) = 0 ° and 45 ° were performed.
Wind speed: 7.71 m / s
Boundary condition: The flow velocity in the plane of Z = 0 (hatch lower end) was 0. (Assuming deck)
　表１に、ＣＦＤシミュレーションの結果を示す。 Table 1 shows the results of the CFD simulation.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　表１に示すように、実施例（隅切りあり）の方が、比較例（隅切りなし）よりも、抗力係数が減少し、風圧抵抗低減効果が見られた。 As shown in Table 1, the drag coefficient was reduced in the example (with corner cutting) and the wind pressure resistance reduction effect was observed compared to the comparative example (without corner cutting).
　以上、本実施形態に係るハッチカバーによれば、船舶航行時にハッチカバーの側面に受ける風の風圧抵抗を低減し、燃費悪化や船体不安定化を抑制することができる。 As described above, according to the hatch cover according to the present embodiment, it is possible to reduce the wind pressure resistance of the wind received on the side surface of the hatch cover during ship navigation, and to suppress the deterioration of fuel consumption and the hull instability.
　　１　ハッチカバー
　　２　ハッチコーミング
　　３　風圧抵抗低減部
　　４　風圧抵抗低減部
　　５　風圧抵抗低減部
　　６　風圧抵抗低減部
　　７　上甲板
　　８　船倉
　１０　ハッチカバー
　１１　隅切り
　１２　隅切り
　１３　隅切り
　１４　隅切り
　２０　ハッチカバー
　２１　付加物
　２２　付加物
　２３　付加物
　２４　付加物
　２５　付加物
　２６　付加物
　２７　付加物
　３０　ハッチカバー
　３１　段差
　３２　段差
　３３　付加物
１００　ハッチカバー DESCRIPTION OF SYMBOLS 1 Hatch cover 2 Hatch combing 3 Wind pressure resistance reduction part 4 Wind pressure resistance reduction part 5 Wind pressure resistance reduction part 6 Wind pressure resistance reduction part 7 Upper deck 8 Hunakura 10 Hatch cover 11 Corner cut 12 Corner cut 13 Corner cut 14 Corner cut 20 Hatch cover 21 Appendices 22 Appendices 23 Adjuncts 24 Adjuncts 25 Adjuncts 26 Adjuncts 27 Adjuncts 30 Hatch Covers 31 Steps 32 Steps 33 Adducts 100 Hatch Covers

Claims (7)

  1. 　船舶のハッチコーミング上に載置される平面視略矩形状のハッチカバーであって、船舶航行時に風を受ける４つの側面の少なくとも１つに、傾斜面及び段差の少なくとも１つからなる風圧抵抗低減部を形成したことを特徴とするハッチカバー。 A substantially rectangular hatch cover in plan view that is placed on a hatch combing of a ship, and has at least one of four side surfaces that receive wind when navigating the ship, and has a reduced wind pressure resistance comprising at least one of an inclined surface and a step. A hatch cover characterized by forming a part.
  2. 　前記風圧抵抗低減部を、前記４つの側面のすべてに形成したことを特徴とする請求項１に記載のハッチカバー。 The hatch cover according to claim 1, wherein the wind pressure resistance reducing portion is formed on all of the four side surfaces.
  3. 　前記ハッチカバーの側面に隅切りを設けて、風圧抵抗低減部を形成したことを特徴とする請求項１又は請求項２に記載のハッチカバー。 The hatch cover according to claim 1 or 2, wherein a corner portion is provided on a side surface of the hatch cover to form a wind pressure resistance reduction portion.
  4. 　前記ハッチカバーの側面に付加物を取り付けて、風圧抵抗低減部を形成したことを特徴とする請求項１又は請求項２に記載のハッチカバー。 The hatch cover according to claim 1 or 2, wherein an appendage is attached to a side surface of the hatch cover to form a wind pressure resistance reduction portion.
  5. 　前記ハッチカバーの側面と前記ハッチコーミングの側面との間に段差を設けて、風圧抵抗低減部を形成したことを特徴とする請求項１又は請求項２に記載のハッチカバー。 The hatch cover according to claim 1 or 2, wherein a step is provided between a side surface of the hatch cover and a side surface of the hatch combing to form a wind pressure resistance reduction portion.
  6. 　前記風圧抵抗低減部を、前記４つの側面のうち船幅方向に平行な２つの側面に形成したことを特徴とする請求項１に記載のハッチカバー。 2. The hatch cover according to claim 1, wherein the wind pressure resistance reducing portion is formed on two side surfaces parallel to a ship width direction among the four side surfaces.
  7. 　前記風圧抵抗低減部を、前記４つの側面のうち船長方向に平行な２つの側面に形成したことを特徴とする請求項１に記載のハッチカバー。 2. The hatch cover according to claim 1, wherein the wind pressure resistance reducing portion is formed on two side surfaces parallel to a ship length direction among the four side surfaces.
PCT/JP2013/064748 2012-05-30 2013-05-28 Hatch cover WO2013180116A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2372164A (en) * 1942-07-17 1945-03-20 Woodlin Metal Products Company Ventilator and mechanism for operating same
US4300440A (en) * 1977-05-23 1981-11-17 Holter John W Ventilating hatch assembly
JPS6069793U (en) * 1983-10-20 1985-05-17 三井造船株式会社 Wind resistance reduction device on ships
JPH1129090A (en) * 1997-07-14 1999-02-02 Nkk Corp Accommodation space shape of ship
JPH11192993A (en) * 1997-10-29 1999-07-21 Okura Senpaku Kogyo Kk Waterproofing device for hold

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2372164A (en) * 1942-07-17 1945-03-20 Woodlin Metal Products Company Ventilator and mechanism for operating same
US4300440A (en) * 1977-05-23 1981-11-17 Holter John W Ventilating hatch assembly
JPS6069793U (en) * 1983-10-20 1985-05-17 三井造船株式会社 Wind resistance reduction device on ships
JPH1129090A (en) * 1997-07-14 1999-02-02 Nkk Corp Accommodation space shape of ship
JPH11192993A (en) * 1997-10-29 1999-07-21 Okura Senpaku Kogyo Kk Waterproofing device for hold

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