KR101879960B1 - A hatch cover for an ocean-going ship - Google Patents

Abstract

The hatch cover (1) includes a cover body (17) and a peripheral skirt (4) which hangs under the cover body (17). The skirt 4 is provided with a support portion 8 for supporting the hatch cover 1 on the hatch coam 2 of the ship and the support portion 8 is provided with a central extended groove 9. The elastic bottom sealing member 10 is provided in the central elongated groove 9 and protrudes out of the groove 9 so as to be sealed against the hatch coaming 2. The lower sealing member 10 is configured to be deformable into the central elongated groove 9 when the hatch cover 1 and the ship are pressed together, in normal use. A plurality of reinforcing bodies (18) are provided on the inside of the cover body (17). The cover body 17, the skirt 4 and the reinforcing bodies 18 are made of fiber-reinforced plastic.

Description

{A HATCH COVER FOR AN OCEAN-GOING SHIP}

The present invention relates to a hatch cover suitable for an outer ship such as a Panamax bulk carrier. Specifically, the present invention relates to a hatch cover made of fiber-reinforced plastic and a vessel provided with such a hatch cover.

Generally, the hatch cover for the outer ship is made of steel. These hatch covers are heavy, require a solid support structure for moving the hatch cover, and robust and expensive lifting and handling arrangements. Moreover, such a cover does not always provide adequate sealing to the vessel to protect the cargo being transported. In addition, due to the high weight of the conventional large hatch cover, the cargo loading capacity of the ship is reduced.

Korean Patent Application No. 2009-0087658 British Patent Application No. 913497 Korean Patent Application No. 2011-0102530 International Publication No. WO2009 / 0064175

It is an object of the present invention to provide a lightweight hatch cover for a vessel which provides stable protection of the cargo to be transported.

This object is achieved by a hatch cover according to the first aspect of the present invention. The hatch cover includes a cover body and a peripheral skirt that hangs under the cover body. The cover body and the surrounding skirt have an inverted channel shaped cross section. The skirt is provided with a support portion for supporting the hatch cover on the hatch coaming of the ship, and a central extension groove is provided on the support portion. An elastic bottom sealing member is provided in the central elongated groove and protrudes from the groove to seal against the hatch coamings. A bottom sealing member is constructed and is deformable into the central elongated groove when the hatch cover and the vessel are pressed together in normal use. The adjacent surface of the hatch coam is formed adjacent to and flat with the lower sealing member. A plurality of reinforcing bodies extend in the transverse direction and are arranged in the longitudinal direction in the cover body, and the hatch cover is positioned in the cover body without the longitudinally extending reinforcement members. Cover bodies, skirts and reinforcement bodies are made of fiber-reinforced plastic.

The combination of configurations in which reinforcement bodies are provided and which use fiber-reinforced plastics for cover bodies, skirts, and reinforcement bodies is such that all of the support around the perimeter skirt from the top of the hatch cover has a consistently good water- A lightweight, corrosion-resistant hatch cover capable of uniformly distributing the load up to a predetermined height. The cover body provides a hatch cover for the vessel, allowing the water to enter the hatch. The skirt generally supports the hatch cover on the top of the vessel through the support of the skirt on the hatch coaming around the hatch. When the hatch cover is positioned to cover the hatch, the bottom sealing member is pressed against the hatch coamings to seal against the coamings and prevent water from passing through the seals and entering the hatch.

When the hatch cover is pushed against the ship, the sealing member is deformed and pressed into the extension grooves of the support, so that the support portion of the hatch cover is directly supported on the underlying surface. Therefore, the sealing member is protected from being heavily loaded, preventing excessive wear and breakage of the bottom sealing member. In other words, the maximum pressure on the bottom sealing member is controlled. This is effective to provide more reliable protection of the goods transported below the cover.

The hatch cover may be a substantially rectangular shape with opposing longitudinal and transverse skirts and the reinforcing bodies extend through the cover body between the longitudinal portions and the opposing lateral sides of the skirt, Respectively. The connection between the skirt and the reinforcement bodies improves the structural integrity of the hatch cover so that the load from the cover body can be distributed through the reinforcement body and skirt to the hatch coamings while the thinner and lighter skirt and cover body can be used.

The reinforcement bodies may be spaced apart at their ends. This makes it possible to attach vent fittings and open holes in the space defined between the ends of adjacent reinforcing profiles.

A plurality of reinforcing plates may be provided on the inside of the skirt and may extend substantially perpendicular to the inside of the skirt. The reinforcing plates provide improved structural integrity of the skirt along, for example, portions of the skirt that are not connected to the reinforcing body.

The stopper members may be provided on at least a portion of the reinforcement bodies and the stopper member has a protrusion engageable within a corresponding recess of a stopper socket attached to the vessel to prevent relative movement between the vessel and the hatch cover. When the hatch cover is positioned over the hatch, the stopper member engages into the corresponding recess of the stopper socket such that the stopper member does not move horizontally or vertically relative to the vessel along each portion of the hatch coamings adjacent to each stopper socket have. Thus, the stopper member prevents a specific movement to each part of the skirt to which each stopper member is attached, thereby preventing excessive wear of the bottom sealing member. However, the stopper member and the socket generally do not prevent relative movement in the vertical direction between the hatch cover and the vessel, so that the hatch cover can still easily ascend or descend. Further, such a configuration of the stopper member and the skein allows the skirt portion adjacent to each stopper member, which is perpendicular to each skirt portion, to move to the outside and inside, to some extent.

This improves the elasticity of the hatch cover, ensuring proper sealing. As an additional effect, the local stress is relaxed, so that a suitably robust lighter cover can be designed. The stopper member may be made of metal. This gives better wear resistance to hatch covers made of fiber-reinforced plastic.

The hatch cover may be provided with cleat brackets on the outer side of the skirt. The cleat bracket allows the hatch cover to releasably connect to the cleats mounted on the vessel. The provision and positioning of the cleat bracket on the hatch cover gives control over the compression of the hitch and the load is applied to the hatch cover to avoid excessive stress on the hatch cover. This is particularly important for lightweight structures, such as those of fiber-reinforced plastics.

The cleat bracket may be provided on the top of the cover body. This positioning of the cleat bracket allows releasable connection of the adjacent hatch cover to form a larger cover structure comprising several hatch covers.

At least one lateral ridge is provided on at least one outer side of the skirt. The side ridges are provided with central elongated grooves and the elastic side sealing members are provided in the central elongated groove of the lateral ridges and protrude from the grooves to seal against the adjacent hatch covers. The side ridges and side sealing members provide an integrated member capable of sealing any portion of the opposing flat surface being pressed so as not to be sensitive to the relative movement between the opposing surface and the lateral ridge. Similar to the bottom sealing member, the side sealing member is protected from a very heavy load to prevent excessive wear and tear of the bottom sealing member. The side ridges and sealing members effectively provide more reliable protection of the goods transported below the cover.

According to one aspect of the present invention, a pair of hatch covers as described above is provided. The adjacent side ridges of the pair of hatch covers may be configured to extend parallel to each other when the pair of hatch covers are positioned adjacent to each other to cover the hatch. Since each ridge extends parallel to each other, relative movement in the first direction is limited, which is advantageous because it ensures proper sealing.

According to another aspect of the present invention, a hatch cover system is provided. The system includes a vessel and one or more hatch covers as described above. Each hatch is surrounded by a hatch coam, and the hatch cover is configured to mate over each hatch coam, such that the lower sealing member is sealably mating with each hatch coam. The hatch cover system of the present invention provides more reliable protection of the goods transported under the cover.

The inner support ridges may be provided on each hatch coam to prevent the skirt of each hatch cover from moving inward. The inner support ridge improves the movement control of the skirt so that there is no risk of excessive deformation of the hatch cover and a lighter hatch cover can be designed without the risk of poor sealing performance.

The outer support ridge can be provided on the hatch coam to prevent the skirt of each hatch cover from moving outward, thereby improving the structural integrity of the hatch cover. A further effect is that the lateral displacement of the hatch cover is prevented so that it does not deviate from the hatch coamings or shifts to the non-hermetic position.

The system may include a stopper socket attached to the vessel and a corresponding stopper member as described above. The stopper member and the stopper socket are configured to be mutually coupled by respective stopper sockets at least to prevent relative movement along the skirt. The combination of the stopper member and the stopper socket functions as described above. The stopper member engages into a corresponding recess of the corresponding stopper socket, so that relative movement is controlled.

This prevents the hatch cover from sliding unintentionally and keeps it in place. When the hatch cover is moved, such as when the hatch cover is slidably opened to allow access to the hatch, the hatch cover is lifted first so that the stopper member and the stopper socket do not engage with each other.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings showing embodiments of the present invention.

1 shows a perspective view of a hatch cover according to an embodiment of the present invention.
Fig. 2 shows a top view of the hatch cover shown in Fig. 1. Fig.
Fig. 3 shows a lateral side view of the hatch cover shown in Figs. 1 and 2. Fig.
Fig. 4 shows a longitudinal side view of the hatch cover shown in Figs. 1 to 3. Fig.
Fig. 5 shows a cross-sectional view of the hatch cover shown in Figs. 1 to 4 cut along line AA in Fig.
Fig. 6 shows a transverse cross-sectional view of the support of the hatch cover shown in Figs. 1-5 cut along line BB in Fig.
Figure 7 shows a longitudinal cross-sectional view of the support of the hatch cover shown in Figures 1 to 5 cut along the line CC of Figure 2;
Fig. 8 is a perspective view showing a part of a plurality of reinforcing bodies. In the nearest portion, a web plate for attaching to a skirt of a hatch cover is provided.
Figure 9 shows a perspective view of a portion of a hatch cover according to an embodiment, provided with a reinforcing plate, a web plate and a ventilation opening from below.
10 shows a perspective view of a plurality of web plates according to one embodiment.
11 shows a perspective view of a part of a hatch cover as viewed from below according to an embodiment of the present invention.
12 shows a perspective view of a part of a skirt of a hatch cover provided with a plurality of reinforcing plates.
Fig. 13 is a perspective view of a part of the hatch cover shown in Figs. 1 to 7, in which an opening is provided for ventilation of the hatch.
Fig. 14 is a perspective view of a part of the hatch cover shown in Figs. 1 to 8, and a rounded corner is provided at the part.
Figure 15 shows a side view of a cross-section of a portion of two adjacent hatch covers that are sealingly adjacent to each other by means of respective sealing members and side ridges and connected using a cleat.
Figure 16 shows a longitudinal cross-sectional view of a portion of the hatch cover, as viewed along line CC of Figure 2, which is fastened by the cleats and rests on top of the hatch coamings.
Figure 17 shows a perspective view of a stopper socket according to an embodiment matched to the recess of the hatch coamings.
18 shows the stopper socket shown in Fig.
19 shows a perspective view of a stopper member according to an embodiment suitable for engaging the stopper socket shown in Figs. 17 and 18. Fig.
Fig. 20 is a perspective view of the hatch cover provided with the stopper socket and the stopper member provided in Figs. 17 to 19 and placed on the hatch coam. Fig.
Fig. 21 is a perspective view of the cleat bracket according to the first embodiment seen from above the front side. Fig.
Figure 22 shows a perspective view from above of the back side of the cleat bracket shown in Figure 21;
Fig. 23 is a perspective view of the cleat bracket according to the second embodiment seen from the front. Fig.
Fig. 24 is a perspective view of the rear side of the cleat bracket shown in Fig. 23 viewed from above.
25 shows a side view of the lateral end of the hatch cover according to an embodiment of the invention, with a transverse section of the skirt hidden to show a transverse section of the longitudinal part of the skirt. For clarity of illustration, the corrugation (reinforcement body 18) has been removed from the drawing.
26 shows a transverse side view of a transverse section of a hatch cover according to an embodiment of the present invention in which an inner support ridge is provided.
Fig. 27 shows a corner portion of the hatch coaming provided with inner and outer support ridges, rails and discharge holes.

1 in which the hatch cover 1 according to the first embodiment of the present invention is placed on the hatch coamings 2. As shown in Fig. The hatch cover 1 includes a cover body 17 and a peripheral skirt 4 which hangs under the cover body 17. [ The skirt 4 is provided with a support portion 8 for supporting the hatch cover 1 on the hatch coam 2 of the ship.

Ship and ship data used with this embodiment of the fiber reinforced plastic hatch cover are:

Oshima Shipbuilding Co., Ltd. Construction number: 10692

77,000 DWT bulk carriers

Ship size: 220m × 32.26m × 19.79m × 12.20m

Freeboard type: B-60

Of course, within the scope of the present invention, the hatch cover of the present invention can be applied to other ships, hatches of different sizes and hatch coamings.

The hatch cover 1 is made of fiber-reinforced plastic and the overall size is 8.01 m x 17.10 m. The height of the hatch cover 1 varies from 0.83 m to 1.03 m. As shown in Fig. 1, the cover body 17 has two oblique portions connected to a wide, flat portion of 1250 mm in the center. In the above-described embodiment, the material thickness of the hatch cover 1 varies between 10 mm and 40 mm. The total weight of the fiber-reinforced plastic for one hatch cover (1) is about 14000 kg, which corresponds to about 40% of the weight of the corresponding steel hatch cover. The material thickness may be further optimized. Two hatch covers (1, 1b) are used together to cover one hatch of the ship.

As shown in FIGS. 2, 3, 8, 13, 14, 20 and 26, a plurality of reinforcing bodies 18 straightens the cover body 17 and exerts a stress on the top of the cover body 17 Is provided on the inner side of the cover body (1) so as to be distributed to the skirt (4). Reinforcing bodies 18 extend through the cover body 17 between opposing longitudinal portions of the skirt 4 and the opposing ends of the respective reinforcing bodies 18 are connected to the skirt 4. As shown in FIG. 8, the reinforcing bodies 18 are formed as a trapezoidal corrugation. The opposing walls of the reinforcing body may be made of a single-skin web or made of a material sandwiched with core material coated on both sides with a fiber-reinforced plastic web.

3 and 26, the inner and outer support ridges 19 and 3 support the hatch coamings 2 to prevent the skirt 4 of the hatch cover 1 from moving inward and outward, respectively, . When the cleats are tensed to pull the skirt downward, the bottom sealing member 10 is pressed against the hatch coamings 2 and is subjected to compressive stress. The inner and outer support ridges 19 and 3 prevent the inner / outer movement of the skirt 4 to prevent excessive wear on the bottom sealing member 10 and the support surface. Reinforcing bodies 18 exist in this embodiment, but are not shown in Fig.

The hatch cover (1) is provided with a cleat bracket (5) on the outer side of the skirt (4). The cleat bracket (5) is bolted to the skirt (4) of the hatch cover (1). Figs. 21 to 24 show two different embodiments of the cleat bracket 5. Fig. The first cleat bracket 5 shown in Figs. 21 and 22 includes an inner plate and an outer plate. The outer plate has a through hole for each bolt, and the inner plate includes a corresponding threaded portion that engages each bolt. In another embodiment shown in Figs. 23 and 24, the outer plate has a bolt welded inside thereof, and the inner plate has a corresponding through hole for bolt. Each bolt is instead joined using a conventional nut on the inside of the inner plate. As shown, the inner plate is divided into two so that it can be attached symmetrically to the cleat bracket over a portion of the skirt provided with an inner reinforcing plate extending perpendicularly to the inside of the skirt.

The moving device 6 is attached to the lateral side of the hatch cover 1. [ Each mobile device 6 includes a wheel mounted on the arm, an electric screw jack (not shown) configured to rotate the arm to selectively raise or lower the wheel, a hatch cover 1 to move back and forth on the rail 7 of the ship (See Figs. 1 and 25).

When the hatch cover moves to the desired position, the wheel of the moving device 6 is lowered to lift the hatch cover 1 freely from any supporting ridge 3. Once lifted, the hatch cover 1 can be easily moved by rolling on a motor driven wheel. For emergency operation, when operating without power supply, the screw jack can be manually operated by turning the screw jack to raise or lower the hatch cover, and a simple pulley winch can be moved sideway ) Can be used to lift into the winch.

Alternatively, the hatch cover 1 is provided with pre-fitted eyes in one embodiment, so that the hatch cover 1 can be easily operated using a crane. It is needless to say that any cleats attaching the hatch cover 1 to the ship must be released before the hatch cover 1 can be lifted and moved. This simple moving system, including the above described moving devices, is not feasible with conventional hatch covers because conventional hatch covers made of steel are too heavy.

6, 7, 15 and 16, the hatch cover 1 is provided with a sealing system for sealing between the hatch coaming 2 and the hatch cover and for sealing between adjacent hatch covers 1, 1b .

6, 7, 16, 25 and 26, the skirt 4 is provided with a support portion 8 for supporting the hatch cover 1 on the hatch coaming 2. The support has a thickness of 40 mm at a height of 100 mm maximum from its open end. A central extension groove 9 is provided in the thicker part of the lower part of the support 8. An elastic bottom sealing member 10 made of rubber is provided in the central elongated groove 9 and protrudes from the groove 9 to be sealed against the hatch coaming 2. The lower sealing member 10 is configured to be deformable into the central elongated groove 9 when the hatch cover 1 and the vessel are pressed together in normal use and the normal use is to use the hatch cover 1 as a hatch coamer (2), and loads merchandise onto the top of the hatch cover (1).

As shown in FIG. 15, the skirt 4 is provided with a lateral ridge 11 provided with a central extended groove 12. The elastic side sealing member 13 is provided in the central extended groove 12 of the side ridge and protrudes from the groove 12 so as to be sealed to the adjacent hatch cover 1b. The side ridges 11 and the side sealing members 13 are not sensitive to the relative movement between the opposing surface and the side ridges 11 anywhere on the opposing flat surface to be pressed and provide a unified member that can be sealed .

In one embodiment, the bottom sealing member and the side sealing member are formed from one continuous rubber element (not shown) extending through both central extending grooves around the entire circumference of the hatch cover 1 for sealing both the hatch cover 1b adjacent to the hatch coaming to be.

As shown in Figure 15, the upper ridge 14 may be provided on the hatch cover to drain water. The upper ridge 14 also functions with the lateral ridge 11 to limit the movement of the opposing side ridges 11b which are positioned to seal against the surface between the side ridges 11 and the upper ridges 14 . The upper ridge 14 and the lateral ridges 11 and 11b are connected to the hatch cover 12 by way of a scupper pipe (not shown), for example, directly to the outside of the hatch cover or from the hatch coaming 2 to the discharge hole 15. [ Outside the cover, an upper recess may be provided to form each channel that draws water out.

The discharge hole 16 may be provided at the bottom of the stopper socket 20 as shown in Fig. 19 shows an embodiment of a stopper member 21 for matching two stopper sockets 20. Fig.

The fiber-reinforced materials shown in the drawings and used in the above-described embodiment are made of Pt. 3 Ch. 4 is a glass fiber reinforced polyester resin according to the acceptance standard for fiber-reinforced plastic composition.

The material properties of the GRP single skin plate are given in Table 1 below. The property predicted in this work is for a fused laminate that is a resin with a fiber volume of about 55%. In the rule, there is no minimum amount of reinforcement value specified for hatch cover application, but a value of 5400 g / m (ie, cargo ship deck) is considered to represent the minimum level for top plating, side and bottom plating (high speed lightweight craft Pt 3, Ch 4, Sec 6, A 202 of the DNV Regulations.

The laminates 1 and 2 are made of E-glass and vinyl ester resin with fibers of orientation (0/90/45 / -45 degrees) with a fiber percentage of each (40/40/10/10%). The bottom plate is the flat middle portion of the strengthening body 18. Laminate 3 is made of E-glass and vinyl ester resin with oriented fibers having (0/90/45 / -45 degrees) percentage of iso-fractions of each (10/10/40/40%). Laminate 4 is an E-glass with oriented fibers having (25/25/25/25%) and (0/90/45 / -45 degrees) fiber content with 25% It is made of resin.

GRP
Laminate
#
location fiber
direction
(Degree) In each fiber direction,
E ₁
(Mpa)
E ₂
(Mpa)
v ₁₂
G ₁₂
(Mpa) certain
weight
(t / m ³ ) One
Top
plate 0-90-45-45 40-40-10-10 23202 23202 0.19 4736 1.89 2
floor
plate 0-90-45-45 40-40-10-10 23202 23202 0.19 4736 1.89 3
Corrugation web 0-90-45-45 10-10-40-40 14135 14135 0.21 9944 1.89 4
Side walls 0-90-45-45 25-25-25-25 17890 17890 0.31 6590 1.89

It is to be understood that the laminate described above is only one of a number of possible laminate options available to those skilled in the art. Any other fiber-reinforced plastic laminate may be used within the scope of the present invention.

The web plate 22 is provided along a skirt portion that can be connected to a similar skirt portion of an adjacent hatch cover, as shown in Figs. 8, 9, 10 and 11. Connected hatch covers typically cover a wide hatch that requires multiple hatch covers to cover the hatch. When using a plurality of hatch covers to cover a wide hatch, there is no central hatch coam for supporting the skirt in the middle of the hatch openings. Therefore, more momentum and stress are generated in the connected skirt portion than in the skirt portion supported on the hatch coam, and accordingly, the web plate 22 is provided for connecting the adjacent reinforcing bodies 18 to each skirt portion The reinforcing body 18 assists in supporting the skirt portion. Increased strength allows better control of the shape of the hatch cover and better control of the seal between adjacent hatch covers to more reliably and effectively protect the shipped cargo.

The reinforcing plate 23 shown in Figures 9, 10 and 11 is provided on another part of the skirt, such as a skirt underneath the hatch coamings present when in use, without having to be connected to nearby reinforcing bodies.

The present application claims priority to Norwegian Patent Application No. 20130932, filed on July 3, 2013, the content of which is incorporated herein by reference.

1: Hatch cover
2: Hatchcamming
3: external supporting ridge
4: Skirt
5: Cleat Bracket
6: Mobile device
7: Rail
8: Support
9: center extension groove (of support)
10: Elastic bottom sealing member
11: Side ridge
12: Center extension groove (of side ridge)
13: elastic side sealing member
14: upper ridge
15: Exhaust hole (of hatch coamings)
16: Discharge hole (of stopper socket)
17: Cover body
18: Reinforcing body
19: inner support ridge
20: Stopper socket
21: Stopper member
22: Web plate
23: reinforcing plate

Claims (15)

With the marine hatch cover 1,
And a peripheral skirt (4) hanging under and surrounding the cover body (17) and the cover body (17)
The skirt 4 is provided with a support portion 8 for supporting the hatch cover 1 on the hatch coam 2 of the ship and the support portion 8 is provided with a central extension groove 9,
An elastic bottom sealing member 10 is provided in the central elongated groove 9 and protrudes from the groove 9 for sealing against the hatch coamper 2,
The lower sealing member 10 is deformed when the hatch cover 1 and the vessel are pressed together together in the normal use so that the whole is pushed into the central extending groove 9 so that the supporting portion 8 is moved to the hatch coaming 2, And is configured to be in direct contact with,
The adjacent surfaces of the hatch coamings 2 are formed adjacent to and flat with the lower sealing member 10,
A plurality of reinforcing bodies 18 extend in the transverse direction and are arranged in the longitudinal direction and are located in the cover body 17. The hatch cover has no reinforcing members extending in the longitudinal direction and is located in the cover body 17,
Characterized in that the cover body (17), the skirt (4) and the reinforcing bodies (18) are made of fiber-reinforced plastic. The method according to claim 1,
The hatch cover 1 is substantially rectangular with opposing longitudinal and transverse skirts and the reinforcing bodies 18 are arranged between the opposing lateral or longitudinal portions of the skirt 4, , And the opposing ends of each reinforcing body are connected to the skirt (4). 3. The method of claim 2,
Wherein the reinforcing bodies are spaced apart from their ends. 3. The method of claim 2,
Characterized in that the reinforcing bodies (18) are spaced along their entire length. 3. The method of claim 2,
A plurality of web plates are provided on the inside of the skirt (4) and extend substantially perpendicular to the inside of the skirt (4). 3. The method of claim 2,
The stopper members 21 are provided on at least a portion of the reinforcement bodies 18 and the stopper members 21 are provided with stopper sockets 20 (not shown) attached to the ship to prevent relative movement between the ship and the hatch cover 1 Wherein the protrusions are engageable in corresponding recesses of the hatch cover (1). The method according to claim 6,
Characterized in that the stopper members are made of metal. The method according to claim 1,
Characterized in that further cleat brackets are provided on the outer sides of the skirt (4). The method according to claim 1,
And a cleat bracket is further provided on an upper portion of the cover body (17). The method according to claim 1,
At least one lateral ridge is provided on at least one outer side of the skirt 4,
The lateral ledge (11) is provided with a central extended groove (12)
Characterized in that the elastic side sealing member 13 is provided in the central extended groove 12 of the side ridge 11 and protrudes out of the groove 12 to seal against the adjacent hatch cover 1b ). A pair of hatch covers (1) according to claim 10,
The respective side ridges 11 and 11b of the hatch covers 1 and 1b are configured to extend in parallel with each other when the pairs of hatch covers 1 and 1b are positioned adjacent to each other for covering the hatch A pair of hatch covers (1). With a hatch cover system,
Ship; And
A hatch cover (1) comprising at least one hatch cover (1) according to any one of the claims 1 to 11,
The ship is provided with one or more hatches,
Each hatch is surrounded by a hatch coam 2,
Characterized in that the hatch covers (1) are matched over each hatch coam (2) such that the lower sealing member (10) is sealingly matched to each hatch coam (2). 13. The method of claim 12,
Characterized in that the inner support ridges (19) are provided on each of the hatch coamings (2) to prevent the skirt (4) of each hatch cover (1) from moving inward. 13. The method of claim 12,
The outer support ridge 3 is provided on the hatch coaming 2 so as to prevent the skirt 4 of each hatch cover 1 from moving outward so that each hatch cover 1 is held in place. Cover system. With a hatch cover system,
Ship; And
8. A hatch cover comprising: at least one hatch cover according to claim 6 or 7,
The ship is provided with at least one hatch,
Each hatch is surrounded by a hatch coamer 2 and the hatch cover 1 is configured to be matched over one of the hatch coamings 2 so that the hermetic seal member 10 is sealingly fitted to each hatch coam 2,
The system includes a stopper socket 20 attached to a ship and the stopper member 21 and the stopper socket 20 are connected to each other by a respective stopper socket 20 to prevent relative movement along at least the skirt 4 Wherein the hatch cover system comprises a hatch cover.

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