JP2002331988A - Hull structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide hull construction capable of attaining cost reduction in expanding and upsizing a hull by using metal with high strength and easy machinability as a material of an aggregate of the hull. SOLUTION: A T-shaped aggregates composed of metal is adopted as a longitudinal aggregate 6 and a transverse aggregate 7 mounted on shell plate of the hull 1 formed out of fiber reinforced plastic or wood. The longitudinal aggregate 6 and the transverse aggregates 7 are arranged on the shell plate 1, and the outer surfaces of the longitudinal aggregate 6 and the transverse aggregate 7 are firmly joined to the shell plate 1 by being fully covered with a laminated sheet 4 formed out of fiber reinforced plastic. Accordingly, this hull construction, different from the construction of an FRP ship or a timber ship of which the conventional shell plate and the aggregate thereof are formed out of the same material, does not require high cost of wood having sufficiently high strength for a die or an aggregate for a large-sized aggregate for accommodating a large shell plate, for example, in upsizing the hull, thereby attaining manufacturing cost reduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hull structure combining different kinds of materials.

[0002]

2. Description of the Related Art Conventionally, a hull has a hull outer plate having a substantially arc-shaped cross section that forms a bottom portion and a side portion of the hull, and a bottom auxiliary aggregate, a side auxiliary aggregate, and a stiffener provided on the hull outer plate. (Reinforcement material) or an aggregate such as a beam provided on the deck of the hull is made of the same material. For example, in a wooden ship, the hull skin and aggregate are made of wood, and in the FRP ship, the hull skin and aggregate are made of fiber reinforced plastic (FR).
P).

[0003]

When such a hull is to be made larger, in an FRP ship, since the hull outer plate and the aggregate are respectively formed by molding dies, a large hull corresponding to the large hull outer plate is formed. It also requires a mold for aggregates, so it costs a lot, and even in a wooden ship, it requires a large amount of high-cost timber with sufficient strength for the aggregates, which is costly. There was a problem. Further, in a wooden ship, there is a problem that the work of attaching the aggregate to the hull outer plate is not easy.

Accordingly, the present invention has been made to solve these problems, and the use of a metal having high strength and easy processing as an aggregate material makes it possible to increase the size of a hull. It is an object of the present invention to provide a hull structure capable of reducing manufacturing costs.

[0005]

According to a first aspect of the present invention, there is provided a hull structure comprising a metal aggregate and a hull shell made of fiber reinforced plastic or wood. In a hull structure, the above-mentioned aggregate is joined to a hull outer plate by a laminated member made of fiber reinforced plastic.

A hull structure according to a second aspect of the present invention is a hull structure comprising an aggregate made of metal and a hull outer plate made of fiber reinforced plastic or wood. The surface is covered with a fiber reinforced plastic, and the aggregate covered with the fiber reinforced plastic is bonded to a hull outer plate with a laminated member made of the fiber reinforced plastic.

Further, the hull structure according to claim 3 is a hull structure comprising an aggregate made of metal and a hull outer plate made of fiber reinforced plastic or wood, wherein the hull structure is formed between the aggregate and the hull outer plate. A fiber-reinforced plastic material, a support aggregate for supporting the aggregate is interposed, and the aggregate, the support aggregate, the support member, and the hull outer panel are each joined by a laminated member made of fiber-reinforced plastic. is there.

According to each of the above hull structures, the hull outer plate of the hull is formed of fiber-reinforced plastic or wood, and as the aggregate of the hull, a metal having high strength and easy processing is used. Since the aggregate made of the material is covered with fiber reinforced plastic, or the aggregate made of the support aggregate and the aggregate made of metal is used, the conventional hull shell and Unlike an FRP ship or a wooden ship in which the aggregate is formed of the same material, when the hull is made larger, a mold for large aggregate corresponding to the large hull outer plate or a high strength having sufficient strength for the aggregate is used. Since no cost wood is required, the production cost can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hull in a hull structure of the present invention comprises a hull outer plate forming a bottom portion and a side portion of a hull made of fiber-reinforced plastic or wood, a bottom rib material made of metal, and a hull side. Ribs, stiffeners (reinforcement)
Aggregates such as are bonded with fiber reinforced plastic.

A hull structure according to a first embodiment of the present invention will be described below with reference to FIGS. 1 and 2
As shown in the figure, the hull in this hull structure has, for example, on both sides of a vertical aggregate 2 made of metal processed according to the shape of the hull outer panel 1 made of fiber-reinforced plastic,
A plurality of horizontal aggregates 3 made of metal and processed in accordance with the shape of the hull shell 1 in a direction orthogonal to the vertical aggregates 2 are welded at predetermined intervals along the vertical aggregates 2. The aggregate 2 and the horizontal aggregate 3 are joined to the hull outer panel 1 by a laminated member 4 made of fiber reinforced plastic.

The vertical aggregate 2 has a hat-like cross section, that is, a trapezoidally concave groove-like cross section.
A has a flange portion 2B that comes into contact with the hull outer panel 1 at A.

The horizontal aggregate 3 is also similar to the vertical aggregate 2,
The cross section is a hat shape, that is, a groove shape concavely trapezoidal in cross section, and has a flange portion 3B at both end edges 3A that comes into contact with the hull outer panel 1.

[0013] As the fiber-reinforced plastic,
Glass fiber reinforced plastics, carbon fiber reinforced plastics, and the like are used, and have properties such as high elastic modulus, high strength, and high vibration damping ability.

The laminated member 4 is formed by laminating a plurality of fiber sheets (fiber sheet layers) made of glass fiber, carbon fiber, or the like with a resin sheet (resin layer) made of synthetic resin or the like via an adhesive. This is referred to as a laminated sheet hereinafter.

When the vertical aggregate and the horizontal aggregate 3 are joined to the hull outer panel 1 by the laminated sheet 4, the laminated sheet 4 formed in advance is covered with the adhesive using an adhesive. On the joint or at the joint,
An adhesive, a resin sheet, and a fiber sheet are sequentially laminated to form a laminated sheet 4 for joining, or a resin layer is applied to the joint portion and the fiber sheet is placed on the laminated part, and the laminate for joining is sequentially repeated. Sheet 4 is formed. (Also for the laminated sheet 4 in the embodiment described below,
The same is true. When manufacturing a hull having the above hull structure, a vertical aggregate 2 and a horizontal aggregate 3 made of metal are processed in accordance with the shape of the hull outer panel 1 of the hull, and both side portions of the vertical aggregate 2 are processed. In addition, a plurality of horizontal aggregates 3 are inserted in a direction orthogonal to the vertical aggregates 2
Is welded to the vertical aggregate 2 at a predetermined interval. After arranging the vertical aggregate 2 to which the horizontal aggregate 3 is welded along the longitudinal direction of the hull shell 1 of the hull, the flanges 2B, 3B of the vertical aggregate 2 and the horizontal aggregate 3 , Hull skin 1
Are bonded with an adhesive. Each of the flange portions 2B, 3B of the vertical aggregate 2 and the horizontal aggregate 3 adhered to the hull skin 1
The laminated sheet 4 is disposed over the upper surface of the hull, and the vertical aggregate 2 and the horizontal aggregate 3 are firmly joined to the hull outer panel 1.

As described above, since the materials of the vertical aggregate 2 and the horizontal aggregate 3 used as the aggregate of the hull are formed of a metal having high strength and easy processing, the conventional hull outer plate and the bone Unlike FRP ships in which the materials are made of the same material, fiber reinforced plastic, for example, when increasing the size of the hull, there is no need for a mold for large aggregates corresponding to the large hull outer plate, so the production cost is reduced. Can be suppressed.

The hat-shaped vertical and horizontal aggregates 2 and 3 adhered to the hull shell 1 have a trapezoidal space between the hull shell 1 and the cross-sectional shape. As shown in FIG. 3, a foaming agent 5 having a sound absorbing / vibrating effect may be filled in this space. In this case, since the foaming agent 5 having a sound absorbing / vibrating effect is filled between the vertical and horizontal aggregates 2 and 3 and the hull outer panel 1, noise transmitted to the hull outer panel 1 when the hull is navigating.・ Vibration is reduced.

Further, as shown in FIG. 4, the vertical aggregate 2 and the horizontal aggregate 3 bonded to the hull outer panel 1 are substantially semicircular in cross section, and both edge portions 2A (3A) are formed in both outward directions. You may use aggregate which spreads.

A vertical aggregate 2 bonded to the hull shell 1
As shown in FIG. 5, an aggregate having a box-shaped cross section, that is, a rectangular cross section may be used as the horizontal aggregate 3. In this case, since the surface of the aggregate is flat in the horizontal direction and the vertical direction, the work of covering the vertical aggregate 2 and the horizontal aggregate 3 with the laminated sheet 4 can be easily performed.

By the way, the hull shell 1, the laminated sheet 4 and the laminating method described in each of the following embodiments are the same as those described in the first embodiment. The same reference numerals as in the first embodiment denote the same parts, and a detailed description thereof will be omitted.

A hull structure according to a second embodiment of the present invention will be described with reference to FIG. The hull structure is different from the hull structure of the first embodiment in that a hat-shaped vertical aggregate 2 and a horizontal aggregate 3 are provided on the hull outer skin 1 of the hull, instead of a T-shaped vertical aggregate 6 and a horizontal aggregate 6. An aggregate 7 is provided, and the entire outer surfaces of the vertical aggregate 6 and the horizontal aggregate 7 are covered with the laminated sheet 4 and joined to the hull outer panel 1.

That is, in this hull structure, the vertical aggregates 6 and the horizontal aggregates 7 provided on the hull
An aggregate having a flat T-shaped flange portion 6B (7B) at the end of the web portion 6A (7A), which has a cross section made of metal as a material, is employed. Flanges 6B (7) of the vertical aggregate 6 and the horizontal aggregate 7
B) is made to face the lower hull outer plate 1 and the lower surface of the flange portion 6B (7B) and the hull outer plate 1 are bonded with an adhesive. The outer surface is completely covered with the laminated sheet 4 and firmly joined to the hull outer panel 1.

Therefore, since the material of the vertical aggregate 6 and the horizontal aggregate 7 used as the aggregate of the hull is formed of metal, the conventional hull outer plate and the aggregate are formed of the same material of fiber-reinforced plastic. Unlike the FRP ship, when the hull is made larger, a molding die for large aggregates corresponding to the large hull outer plate is not required, so that the manufacturing cost can be reduced and the hull outer plate 1 is provided. Since the entire outer surfaces of the vertical aggregates 6 and the horizontal aggregates 7 are covered with the laminated sheet 4, the corrosion of the vertical aggregates 6 and the horizontal aggregates 7 can be completely prevented. Further, the T adhered to the hull outer panel 1
Since the vertical aggregates 6 and the horizontal aggregates 7 have a simple shape, the manufacture is easy and the weight of the hull can be reduced.

Next, a hull structure according to a third embodiment of the present invention will be described with reference to FIG. This hull structure is
The entire outer surfaces of the vertical aggregate 6 and the horizontal aggregate 7 described in the embodiment are covered with fiber reinforced plastic, and the aggregate covered with the fiber reinforced plastic, that is, the coated vertical aggregate 8 and the coated horizontal aggregate 9 is joined to the hull outer panel 1 with the laminated sheet 4.

That is, in this hull structure, the coated vertical aggregate 8 and the coated horizontal aggregate 9 provided on the hull
The entire outer surfaces of the vertical and horizontal aggregates 6 and 7 are covered with fiber reinforced plastic and the cross section is H-shaped (or I-shaped), that is, a flat plate parallel to both ends of the web portion 8A (9A). 8Ba (9Ba), 8Bb (9Bb)
Are formed, and the web portion 8A (9A)
The web portion 6A (7A) and the flange portion 6B (7B) of the T-shaped vertical aggregate 6 and the horizontal aggregate 7 enter the flange portion 8Ba (9Ba) at one end, and the flange portion 8Bb ( 9Bb) employs a coated aggregate formed only of fiber reinforced plastic, and the coated aggregate, that is, the flange portion 8Bb at the other end of the coated vertical aggregate 8 and the coated horizontal aggregate 9
(9Bb) faces the lower hull skin 1, and the lower surface of the flange 8Bb (9Bb) at the other end and the hull skin 1
And the coated vertical aggregate 8 and the coated horizontal aggregate 9 from the central portion to the other end of the flange portion 8Bb (9).
Bb) is covered with the laminated sheet 4 and firmly joined to the hull outer panel 1. By adjusting the flange portions of the coated vertical aggregate 8 and the coated horizontal aggregate 9 that are in contact with the hull outer panel 1, a shape corresponding to a desired hull shape can be easily obtained.

As described above, a coated hull having a function as an aggregate of a hull can be easily manufactured simply by covering a T-shaped aggregate formed of metal with fiber-reinforced plastic. Unlike an FRP ship in which the skin and aggregate are made of the same material fiber-reinforced plastic, when the hull is enlarged, a mold for large aggregate corresponding to the large hull skin is not required, so It can be processed easily according to the shape of the large hull skin at low manufacturing cost, and the covering aggregate provided on the hull skin completely covers the entire outer surface of the T-shaped aggregate with the laminated sheet. As a result, the corrosion of the T-shaped aggregate can be completely prevented, and further, at the joint between the coated aggregate and the hull outer plate, joining of materials having the same rigidity (fibre-reinforced plastics) is performed. Therefore, the same change In addition, the difference in the amount of displacement due to the characteristic difference (metal and fiber reinforced plastic) between the T-shaped aggregate incorporated into the coated aggregate and the material of the hull skin is the fiber that forms the coated aggregate. Since it is absorbed by the reinforced plastic, the peeling action between the aggregate (the coated aggregate and the hull shell) can be suppressed more than between the aggregate and the hull shell in the first and second embodiments.

Further, the coated aggregate provided on the hull shell plate is a material in which the entire outer surface of a T-shaped aggregate made of a metal is completely covered with fiber reinforced plastic, so that the metal is made of a material. Therefore, the corrosion of the T-shaped aggregate can be completely prevented, and therefore, highly corrosive liquid, oil, water, and the like can be stored in the hull outer panel.

By the way, in the third embodiment, when the coated vertical aggregate 8 and the coated horizontal aggregate 9 are joined to the hull outer panel 1, the center of the coated vertical aggregate 8 and the coated horizontal aggregate 9 is adjusted. Although the one covered with the laminated sheet 4 from the portion to the flange portion 8Bb (9Bb) at the other end has been described, as shown in FIG.
The entire outer surfaces of the coated vertical aggregate 8 and the coated horizontal aggregate 9 may be covered with the laminated sheet 4 and joined to the hull outer panel 1. In this case, since the entire outer surfaces of the coated vertical aggregate 8 and the coated horizontal aggregate 9 are covered with the laminated sheet 4, the coated vertical aggregate 8 and the coated horizontal aggregate 9 are more firmly joined to the hull outer panel 1. can do.

Next, a hull structure according to a fourth embodiment of the present invention will be described with reference to FIG. The hull structure includes a metal aggregate 1 between the hull skin 1 and the aggregate 10 (11).
With the support aggregate 12 (13) made of fiber-reinforced plastic supporting the support aggregate 0 (11), the aggregate 10 (11) and the support aggregate 12 (13), and the support aggregate 12 (13) The hull outer panel 1 is joined with the laminated sheet 4 to form a composite vertical aggregate 14 and a composite horizontal aggregate 15.

That is, in the hull structure, the composite vertical aggregate 14 and the composite horizontal aggregate 15 provided on the hull outer panel 1 have an H-shaped (or I-shaped) cross section, that is, a web portion 10A (11A). An aggregate 10 (11) having flat plate-like flange portions 10Ba (11Ba) and 10Bb (11Bb) at both ends, and the same shape as the aggregate 10 (11), and the cross section is H-shaped (or I-shaped). ), That is, flat flange portions 12Ba (13Ba) and 12Bb (13B) parallel to each other at both ends of the web portion 12A (13A).
A composite aggregate comprising the support aggregate 12 (13) having b) is adopted.

When the composite aggregate is manufactured and joined to the hull shell 1, the aggregate 10 (11) and the support aggregate 1
2 (13) at one end of the flange portion 10Ba (11B
a), 12Ba (13Ba) face each other,
A composite aggregate is formed by bonding with an adhesive. Then, the joint portion 16 (17) of the composite aggregate is covered with the laminated sheet 4 from both sides, and the aggregate 10 (11) and the supporting aggregate 12 (13) are firmly joined. Supporting aggregate 12
The flange 12Bb (13Bb) at the other end of (13) faces the hull outer panel 1 below, and the flange 12Bb (13Bb) at the other end and the hull outer panel 1 are bonded with an adhesive. The laminated sheet 4 extends from the center of the support aggregate 12 (13) to the flange 12Bb (13Bb) at the other end.
And the composite aggregate is firmly joined to the hull skin 1.

As described above, the composite aggregate having the function of the hull aggregate is an H-shaped aggregate 10 made of metal.
The H-shaped support aggregate 12 (13) manufactured according to the shape of the aggregate 10 (11) is joined to (11) to form a double aggregate. Since it has the function of an aggregate with stronger strength, unlike a conventional FRP ship in which the hull shell and aggregate are made of the same material, fiber-reinforced plastic, when increasing the size of the hull, A molding die for large aggregates corresponding to the hull outer plate is not required, so that the manufacturing cost can be reduced.

At the joint between the composite aggregate and the hull shell 1, materials having the same rigidity (fiber reinforced plastics) are joined to each other. The difference between the properties of the aggregate made of the material and the material of the hull shell is absorbed by the fiber reinforced plastic forming the supporting aggregate, so that the difference between the aggregate and the hull shell in the first and second embodiments is improved. Also, the peeling action between them (between the composite aggregate and the hull skin) can be minimized.

When a hull having the above-mentioned hull structure is manufactured, the aggregate 10 (11) and the supporting aggregate 12 (13) constituting the composite aggregate are respectively subjected to optimal processes (downward work is possible). It can be manufactured in parallel, and this aggregate 1
0 (11) and the supporting aggregate 12 (13), and the aggregate 10 (11) and the supporting aggregate 12 (13).
Can be wrapped with the construction process for combining the two, and thus the production period can be shortened.

In the fourth embodiment, the H-shaped supporting bone for supporting the aggregate 10 (11) is provided between the H-shaped aggregate 10 (11) and the hull outer plate 1. Lumber 1
2 (13), the flange portion 10Ba (1) at one end of the aggregate 10 (11) and the support aggregate 12 (13).
1Ba) and 12Ba (13Ba) were bonded together with an adhesive to form a composite aggregate. As shown in FIG. 10, a T-shaped metal aggregate 18 (19) and a hull shell 1, a T-shaped fiber-reinforced plastic supporting aggregate 20 (21) for supporting the T-shaped aggregate 18 (19) is interposed between the T-shaped aggregates 18 (19). And T
Web portion 18A (19)
A), a composite aggregate obtained by joining 20A (21A) to each other, that is, a composite vertical aggregate 22 and a composite horizontal aggregate 23 may be used. In this case, the web portion 20A of the support aggregate 20 (21)
At (21A), a substantially concave embedding portion 20Aa (21Aa) for embedding the web portion 18A (19A) of the T-shaped aggregate 18 (19) is formed at the top portion.
The inside of the embedding portion 20Aa (21Aa) of (21) is applied with an adhesive, and the web portion 18A of the T-shaped aggregate 18 (19) is applied.
By embedding (19A), the web portion 20A (21A) of the support member 20 (21) is joined to form a composite aggregate.
Then, the joint portion 24 (25) of the composite aggregate is covered with the laminated sheet 4 from both sides, and the aggregate 18 (19) and the supporting aggregate 20 (21) are firmly joined. When this composite aggregate is to be joined to the hull shell 1, the lower surface side of the flange portion 20B (21B) of the support aggregate 20 (21) constituting the composite aggregate is opposed to the lower hull shell 1. Then, this flange portion and the 20B (21B) hull outer panel 1 are bonded with an adhesive,
From the center of the supporting aggregate 20 (21), the flange 2
The composite aggregate is firmly bonded to the hull skin 1 by covering with the laminated sheet 4 over 0B (21B). Therefore, since the composite aggregate is composed of a double aggregate, the composite aggregate has high strength and a T-shaped aggregate 18 (1) constituting the composite aggregate.
9) web portion 18A (19A) is supported aggregate 20 (2
Since the embedding portion 20Aa (21A) of 1) is firmly embedded and fixed, the T-shaped aggregate 18 (19) and the supporting aggregate 20 (21) are firmly joined. The T-shaped aggregate 18 (19) and the support aggregate 20 (21)
The H-shaped aggregate 10 (11) and the supporting aggregate 12 (1)
Compared to 3), the shape is easier to manufacture.

In the second to fourth embodiments, the T-shaped aggregate having the same cross section from one end to the other end is used.
As shown in FIG. 12, a plurality of rectangular holes (light holes) 27 are formed at predetermined intervals in the web portion 26A of the T-shaped aggregate 26 from one end to the other end. Aggregate may be used. When the aggregate 26 is covered with the laminated sheet 4 and joined to the hull outer panel 1, the hole 27 of the aggregate 26 is used.
The laminated sheet 4 is also provided, and the laminated sheet 4 completely covers the flange portion 26B of the aggregate 26 in the width direction and is joined to the hull outer panel 1. The gap between the holes 27 of the laminated sheet 4 is filled with the filler 28, and the outer surface of the aggregate 26 is further covered with the laminated sheet 4. Therefore, the aggregate 26 is composed of the laminated sheet 4 passed through the hole 27 of the aggregate 26 and the laminated sheet 4 covering the outer surface of the aggregate 26,
That is, since it is covered by the double laminated sheets 4 and 4,
Aggregate 26 and hull skin 1 can be more strongly joined.

In each of the above embodiments, the same aggregate,
That is to say, the hat-shaped aggregate, the T-shaped aggregate, the coated aggregate, or the composite aggregate has been described. However, according to the shape of the hull, these aggregates are appropriately combined to form a vertical bone. Different aggregates may be used for the aggregate and the lateral aggregate.

Further, in each of the above embodiments, the hull outer plate of the hull is formed of fiber reinforced plastic. However, the hull outer plate of the hull may be replaced with a hull outer plate formed of wood. Also in this case, as the aggregate of the hull, each of the aggregates according to any of the first to fourth embodiments, that is, a hat-shaped aggregate formed of a metal having high strength and easy processing, T Shaped aggregate,
Since the T-shaped aggregate is made of a coated aggregate that can be easily manufactured simply by covering the fiber-reinforced plastic, or a composite aggregate having higher strength, the conventional hull shell and the aggregate are made of the same material. Unlike a wooden boat made of wood, when the size of the hull is increased, high-cost wood having sufficient strength for the aggregate is not required, so that the manufacturing cost can be reduced.

When the existing hull whose hull shell and aggregate are made of the same material, such as fiber-reinforced plastic or wood, is extended, it is effective to apply the hull structure to the hull shell of the hull.

When the hull skin of the hull is formed of wood, and this hull skin is applied to the hull skin 1 in the above-described third embodiment, in the joint portion between the coated aggregate and the hull skin, Is a joint between similar materials having low rigidity (fiber reinforced plastic and wood), so that there is not much difference in the amount of displacement due to external force, so that the peeling action between the two is small.

In each of the above embodiments, the hull structure is applied to the hull shell of the hull. However, the hull structure may be applied to a plate portion such as the deck of the hull. Further, the present invention may be applied to a plate portion of an offshore structure other than the hull.

[0042]

According to the hull structure of the first aspect of the present invention, the hull outer plate of the hull is formed of fiber-reinforced plastic or wood, and the material of the hull aggregate is strong and easy to process. Unlike conventional FRP boats or wooden boats, in which the hull skin and aggregate are formed of the same material, for example, when the hull is enlarged, the large hull corresponding to the large hull skin Because it does not require a mold for the aggregate or expensive wood with sufficient strength for the aggregate,
Production costs can be reduced.

According to the hull structure of the second aspect,
The hull shell of the hull is formed of fiber-reinforced plastic or wood, and the aggregate of the hull is made of a metal-based aggregate covered with fiber-reinforced plastic. Unlike an FRP ship or a wooden ship in which the aggregate is formed of the same material, when the hull is made larger, a mold for large aggregate corresponding to the large hull outer plate or a high strength having sufficient strength for the aggregate is used. Since no costly wood is required, the production cost can be reduced, and at the joint between the hull aggregate and the hull outer plate, materials having the same rigidity (fiber reinforced plastics) or similar materials are used. (Fiber reinforced plastic and wood), so that the joint between the hull structure and the hull outer plate (the aggregate and the hull structure in the hull structure according to claim 2) is better than that between the two. It is possible to suppress the exfoliation of the fine hull plates).

The aggregate of the hull in the hull structure according to the second aspect of the present invention is formed by completely covering the entire outer surface of the aggregate made of metal with fiber reinforced plastic.
Corrosion of the aggregate made of the metal can be completely prevented, and therefore, highly corrosive liquid,
Oil, water, etc. can be stored. Further, by adjusting the flange portion of the aggregate of the hull which comes into contact with the hull skin, a shape corresponding to a desired hull shape can be easily obtained.

Further, according to the hull structure of the third aspect, the hull outer plate of the hull is formed of fiber reinforced plastic or wood, and the aggregate of the hull is a double aggregate of the aggregate and the support aggregate. Unlike the conventional hull hull and the FRP ship or the wooden hull, in which the hull shell and aggregate are formed of the same material, the hull shell corresponds to the large hull shell when the hull is enlarged. Since it is not necessary to use a molding die for a large aggregate or expensive wood having sufficient strength for the aggregate, the production cost can be reduced.

At the joint between the double aggregate used for the hull and the hull outer panel, materials having the same rigidity (fiber reinforced plastic) or similar materials (fiber reinforced plastic and wood) are used. Since the joint is used, the same displacement amount or difference in displacement amount with respect to external force hardly occurs.Furthermore, the difference in characteristics between the aggregate made of metal and the material of the hull outer plate makes the fiber reinforced plastic that forms the support aggregate. Therefore, the peeling action between the aggregate (the double aggregate used for the hull and the hull outer panel) is suppressed more than between the aggregate and the hull outer panel in the hull structure according to claim 1. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a hull structure according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a hat-shaped aggregate in the hull structure.

FIG. 3 is a sectional view of a modified example of the aggregate.

FIG. 4 is a sectional view of a modification of the aggregate.

FIG. 5 is a sectional view of a modification of the aggregate.

FIG. 6 is a sectional view of an aggregate in a hull structure according to a second embodiment of the present invention.

FIG. 7 is a sectional view of an aggregate in a hull structure according to a third embodiment of the present invention.

FIG. 8 is a sectional view of a modified example of the aggregate.

FIG. 9 is a sectional view of an aggregate in a hull structure according to a fourth embodiment of the present invention.

FIG. 10 is a sectional view of a modified example of the aggregate.

FIG. 11 is a perspective view of a main part of a T-shaped aggregate in the hull structure of the second to fourth embodiments of the present invention.

FIG. 12 is a sectional view of the aggregate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull outer panel 2 Vertical aggregate 3 Horizontal aggregate 4 Laminated sheet 6 Vertical aggregate 7 Horizontal aggregate 8 Vertical aggregate 9 Horizontal aggregate 10 Aggregate 11 Aggregate 12 Support aggregate 13 Support aggregate 14 Vertical aggregate 15 Lateral aggregate 18 Aggregate 19 Aggregate 20 Support aggregate 21 Support aggregate

Claims (3)

[Claims] 1. A hull structure comprising an aggregate made of metal and a hull shell made of fiber-reinforced plastic or wood, wherein the aggregate is made of a fiber-reinforced plastic on the hull shell. A hull structure that is joined by a hull. 2. A hull structure comprising an aggregate made of metal and a hull shell made of fiber-reinforced plastic or wood, wherein the outer surface of the aggregate is covered with fiber-reinforced plastic, A hull structure in which an aggregate covered with reinforced plastic is joined to a hull outer panel with a laminated member made of fiber reinforced plastic. 3. A hull structure comprising an aggregate made of metal and a hull shell made of fiber-reinforced plastic or wood, wherein a fiber-reinforced plastic material is provided between the aggregate and the hull shell. A hull structure in which an aggregate and a support aggregate and a support member and a hull outer panel are respectively joined by a laminated member made of fiber-reinforced plastic with a support aggregate for supporting the aggregate interposed therebetween.