Ships

Abstract

To provide a highly durable raft-type vessel.SOLUTION: The raft-type vessel comprises: a plurality of floats made of fiber-reinforced plastic materials; a hull frame made of a metal material including aluminum and connected to the plurality of floats; and a deck disposed on the hull frame. Each float has a bracket extending in a width direction of the float. The bracket and the hull frame can be detachably connected by a connection member.SELECTED DRAWING: Figure 1

Description

Technical Field

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[0001] The present disclosure relates to a ship. In particular, it relates to a raft-type ship.

Background Art

[0002] Conventionally, rafts have been used as scaffolds on the sea. For example, in sea fishing pits, etc., a plurality of rafts are combined and used as a scaffold for tourists, enabling sea fishing on the sea away from land. Also, there have been attempts to utilize rafts by providing buildings on them as scaffolds and rest areas for activities such as diving and snorkeling. For example, Patent Document 1 discloses a self-propelled raft-type houseboat equipped with a self-power generation device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventional raft-type ships have a simple structure mainly focused on floating on the sea, such as using styrofoam as a floating body, and there is room for improvement in durability for use as a ship navigating on the sea.

[0005] An object of an embodiment of the present disclosure is to provide a raft-type ship excellent in durability during navigation.

Means for Solving the Problems

[0006] A raft-type ship in an embodiment of the present disclosure includes a plurality of floats made of a fiber-reinforced plastic material, a hull frame connected to the plurality of floats and made of a metal material containing aluminum, and a deck disposed on the hull frame.

[0007] The float may have a bracket portion extending in the width direction of the float, and the bracket portion and the hull frame may be detachably connected by a connecting member. In this case, the connecting member may include a bolt, nut and washer, and the washer may have a bottomed cylindrical shape.

[0008] The hull frame may have a frame portion and a beam portion attached to the frame portion, and the float may have a longitudinal direction perpendicular to the beam portion. In this case, the bracket portion may be provided at a position where the float and the beam portion intersect.

[0009] The bracket portion may be composed of a laminated structure consisting of a first fiber-reinforced plastic layer forming the upper surface of the float and a second fiber-reinforced plastic layer forming the side surface of the float.

[0010] The upper end of the float may be provided with a reinforcing member and a plurality of fiber-reinforced plastic layers covering the reinforcing member.

[0011] The plurality of fiber-reinforced plastic layers may have a laminated structure of at least three layers. In this case, the layer furthest from the reinforcing member in the laminated structure of three or more layers may cover the edges of the other layers and be in contact with the inner surface of the float. [Effects of the Invention]

[0012] According to one embodiment of the present disclosure, a raft-type vessel with excellent durability during navigation can be provided. [Brief explanation of the drawing]

[0013] [Figure 1] This figure shows the configuration of a ship in one embodiment of the present disclosure, where (A) is a perspective view seen from diagonally above, and (B) is a front view seen from the front. [Figure 2]This figure shows the configuration of the base section of a vessel according to one embodiment of the present disclosure, where (A) is a perspective view taken from diagonally above showing the float connected to the hull frame, and (B) is a perspective view taken from diagonally above showing the float separated from the hull frame. [Figure 3] This figure shows the configuration of the base portion of a vessel according to one embodiment of the present disclosure, where (A) is a perspective view taken from diagonally below showing the float connected to the hull frame, and (B) is a perspective view taken from diagonally below showing the float separated from the hull frame. [Figure 4] This figure shows the configuration of the base portion of a ship according to one embodiment of the present disclosure, where (A) is a cross-sectional view of the base portion as seen from the front, and (B) is an enlarged view of the portion indicated by the frame in (A). [Modes for carrying out the invention]

[0014] A vessel according to one embodiment of the present disclosure will be described below with reference to the drawings. However, the vessel of the present invention can be carried out in many different ways and should not be construed as being limited to the examples shown below.

[0015] In this specification, "up" refers to the direction in which buoyancy acts when a vessel is in use, and "down" refers to the opposite direction (i.e., the direction in which gravity acts). Furthermore, "forward" refers to the direction in which the vessel is moving, and "rear" refers to the opposite direction. In addition, "left" and "right" refer to the left and right sides when the vessel is facing forward. Note that in the following explanation, the front-to-back direction may be referred to as the overall length direction, and the left-to-right direction may be referred to as the width direction.

[0016] <First Embodiment> (Ship composition) Figure 1 shows the configuration of a vessel 100 in one embodiment of the present disclosure. Specifically, Figure 1(A) is a perspective view of the vessel 100 seen from diagonally above, and Figure 1(B) is a front view of the vessel 100 seen from the front.

[0017] As shown in FIGS. 1(A) and 1(B), the ship 100 includes a float 102, a hull frame 104 disposed on the float 102, a deck 106 disposed on the hull frame 104, a protective fence 108 installed on the deck 106, and a building 110 installed on the deck 106. The ship 100 of the present embodiment shows an example in which three floats are provided, but it is not limited to this example, and the number of floats may be two or four or more. In the following description, the structure composed of the float 102, the hull frame 104, and the deck 106 is referred to as a base portion 100a.

[0018] The float 102 is a hollow floating body having a longitudinal direction in the entire length direction of the ship 100 and is made of a fiber reinforced plastics (FRP) material. As will be described later, a plurality of rod-shaped reinforcing members (not shown) are arranged inside the float 102 along the entire length direction. The reinforcing members serve to prevent the deformation of the float due to external pressure. The float 102 is connected to the hull frame 104 via a flat upper surface.

[0019] The hull frame 104 is formed by combining cylindrical members made of a metal material containing aluminum and functions as the skeleton of the ship 100. The hull frame 104 includes a frame portion 104a assembled in a frame shape and a beam portion 104b attached to the frame portion 104a. Although not shown in FIG. 1, the hull frame 104 also includes a beam portion 104c (see FIG. 3) provided in a direction orthogonal to the beam portion 104b. The hull frame 104 is not limited to this example, and the beam portion 104b may be omitted.

[0020] By configuring the hull frame 104 using a metal material containing aluminum, it is possible to reduce the overall weight of the ship 100. In addition, aluminum is easy to process and has the advantage of excellent corrosion resistance because an oxide is formed on the surface. In order to further improve the durability of the hull frame 104, the hull frame 104 may be configured by combining members subjected to anodizing treatment.

[0021] The deck 106 functions as the floor surface of the ship 100. Although not shown in the figure, the deck 106 is composed of arranging a plurality of strip-shaped plate members side by side, and the gaps between the plate members are covered with rubber members or the like. By covering the gaps in the deck 106, it is possible to prevent seawater or the like from rising onto the deck 106 or the wind from blowing up from below the deck 106.

[0022] The protective fence 108 is arranged above the deck 106 so as to surround the deck 106, and is a structure for preventing people and objects on the deck 106 from falling. There is no particular limitation on the material constituting the protective fence 108, but it is preferably composed of a metal material including lightweight and corrosion-resistant aluminum. However, depending on the use of the ship 100, the protective fence 108 may be omitted.

[0023] The building 110 is a structure including at least the columns 110a and the roof 110b, and is used for the purpose of accommodating people or storing things. The building 110 may include wall materials, window glasses, etc. That is, the building 110 may be a structure that can be used as an indoor space that can withstand wind and rain. In this case, there is no particular limitation on the material constituting the building 110, but it is desirable to use a material that is as lightweight and highly corrosion-resistant as possible.

[0024] There is no limitation on the use of the building 110, and it can be applied to various uses by utilizing the advantage of being able to navigate on water regardless of the ocean or river. For example, although not shown in the figure, the building 110 of this embodiment can form a glass-enclosed indoor space by closing the space between the columns 110a with large glass plates. Specifically, the ship 100 of this embodiment is assumed to be used as a cruising restaurant with the interior of the building 110 partitioned into a plurality of indoor spaces and equipped with toilets, kitchens, passenger room spaces, etc. Therefore, although not shown in the figure, an outboard motor for navigating the ship 100 is attached to the rear of the hull frame 104.

[0025] (Configuration of the base part) Figures 2 and 3 show the configuration of the base portion 100a in a vessel 100 according to one embodiment of the present disclosure. Specifically, Figure 2(A) is a perspective view taken from diagonally above showing the state in which the float 102 is connected to the hull frame 104, and Figure 2(B) is a perspective view taken from diagonally above showing the state in which the float 102 is separated from the hull frame 104. Figure 3(A) is a perspective view taken from diagonally below showing the state in which the float 102 is connected to the hull frame 104, and Figure 3(B) is a perspective view taken from diagonally below showing the state in which the float 102 is separated from the hull frame 104.

[0026] As shown in Figures 2 and 3, the hull frame 104 has a frame section 104a configured in a frame shape, two beam sections 104b provided along the entire length (front-to-back direction) of the ship 100, and a plurality of beam sections 104c provided along the width (left-to-right direction) of the ship 100. In plan view, the outer shape of the frame section 104a and the outer shape of the deck 106 are substantially the same. The plurality of beam sections 104c are provided perpendicular to the two beam sections 104b and are configured to span between the two sides that constitute the frame section 104a. In this embodiment, the number of beam sections 104b and beam sections 104c is not limited to the examples shown in Figures 2 and 3. For example, at least one beam section 104b may be provided between each float 102. That is, the beam sections 104b and beam sections 104c may be combined in a grid pattern.

[0027] In this embodiment, each float 102 is arranged at equal intervals between two beam sections 104b. As shown in Figure 2(B), the upper surface 102a of the float 102 is planar, and each float 102 is mounted to the hull frame 104 such that the upper surface 102a faces the hull frame 104. Each float 102 is detachably attached to the hull frame 104 via fasteners (not shown). Therefore, the vessel 100 of this embodiment has the advantage that the floats 102 can be removed from the hull frame 104 and transported. Furthermore, if a malfunction such as damage to a float 102 occurs while the vessel 100 is in operation, the vessel 100 can continue to be operated simply by replacing the damaged float 102, thus offering the advantage of excellent maintainability.

[0028] As shown in Figure 3, the float 102 is positioned perpendicular to the beam 104c. That is, the longitudinal direction of the float 102 and the longitudinal direction of the beam 104c are perpendicular to each other. In this embodiment, the float 102 and the hull frame 104 are connected at the point where the float 102 and the beam 104c intersect.

[0029] Figure 4 shows the configuration of the base portion 100a in a vessel 100 according to one embodiment of the present disclosure. Specifically, Figure 4(A) is a cross-sectional view of the base portion 100a as seen from the front, and Figure 4(B) is an enlarged view of the portion indicated by the frame line 200 in Figure 4(A).

[0030] As shown in Figure 4(A), each float 102 has a top surface 102a, a side surface 102b, and a bottom surface 102c. In addition, multiple rod-shaped reinforcing members 18 are arranged inside the float 102 along its entire length. There is no particular limit to the number of reinforcing members 18, but the number of reinforcing members 18 to be arranged should be appropriately determined considering the balance between improving the frame strength and increasing the weight. Each float 102 is connected with its top surface 102a facing the beam portion 104c of the hull frame 104.

[0031] Furthermore, as shown in Figure 4(B), each float 102 is composed of a fiber-reinforced plastic layer 11 that constitutes the upper surface 102a of the float 102, and a fiber-reinforced plastic layer 12 that constitutes the side surface 102b and bottom surface 102c of the float 102. In other words, the float 102 is constructed by combining a planar fiber-reinforced plastic layer 11 and a substantially U-shaped fiber-reinforced plastic layer 12. The fiber-reinforced plastic layers 11 and 12 may be single-layer or laminated, but in order to ensure the strength of the float 102, in this embodiment, a laminate formed by stacking multiple fiber-reinforced plastic layers is used as the fiber-reinforced plastic layers 11 and 12.

[0032] Here, since the upper surface 102a of the float 102 and the beam portion 104c of the hull frame 104 are planar in shape, when they are connected facing each other, stress tends to concentrate at the upper end (corner) of the float 102. Therefore, in this embodiment, a reinforcing structure 20 is provided for the upper end (corner) of the float 102 that is connected to the hull frame 104.

[0033] In this embodiment, the reinforcing structure 20 is composed of a reinforcing member 21 and three fiber-reinforced plastic layers 22 to 24 covering the reinforcing member 21. The reinforcing member 21 is made of, for example, plywood and is bonded to the fiber-reinforced plastic layer 12. There is no limit to the width of the reinforcing member 21, but it may be in the range of 150 mm to 250 mm. The thickness of the reinforcing member 21 may be in the range of 10 mm to 15 mm. In this embodiment, an example using plywood as the reinforcing member 21 is shown, but it is not limited to this example, and may be a metal plate or a hardened plastic member.

[0034] Each of the fiber-reinforced plastic layers 22-24 may be a single layer or a laminated structure. In this embodiment, first, an FRP sheet functioning as fiber-reinforced plastic layer 22 is immersed in a solvent and then attached to cover the reinforcing member 21. Next, an FRP sheet functioning as fiber-reinforced plastic layer 23 is immersed in a solvent and attached on top of the fiber-reinforced plastic layer 22. Finally, an FRP sheet functioning as fiber-reinforced plastic layer 24 is immersed in a solvent and attached to cover the fiber-reinforced plastic layers 22 and 23. The solvent has the property of hardening over time and hardens after a predetermined time has elapsed. In this way, a reinforced structure 20 is formed in which the reinforcing member 21 is covered with fiber-reinforced plastic layers 22-24.

[0035] As shown in Figure 4(B), in this embodiment, fiber-reinforced plastic layers 22 and 23 are bonded together so that their ends are generally aligned, and the uppermost fiber-reinforced plastic layer 24 (the layer furthest from the reinforcing member 21) is bonded to cover the ends of fiber-reinforced plastic layers 22 and 23 and to the inner surface of the float 102 (i.e., the inner surface of fiber-reinforced plastic layers 11 and 12). The length of the portion of the fiber-reinforced plastic layer 24 that contacts the inner surface of the float 102 (contact portions 24a and 24b) is preferably 30 mm or more (preferably 50 mm or more).

[0036] Furthermore, in this embodiment, the strength of fiber-reinforced plastic layer 22 and fiber-reinforced plastic layer 24 are made substantially the same, and the strength of fiber-reinforced plastic layer 23 is made higher than the strengths of fiber-reinforced plastic layers 22 and 24. In this case, for example, the number of layers (thickness of layers) of fiber-reinforced plastic layer 23 should be greater than the number of layers (thickness of layers) of fiber-reinforced plastic layers 22 and 24.

[0037] Furthermore, in this embodiment, the reinforcing structure 20 is formed using three fiber-reinforced plastic layers 22-24, but the number of fiber-reinforced plastic layers is not limited to this example. For example, the fiber-reinforced plastic layer covering the reinforcing member 21 may be one or two layers, or four or more layers. However, in order to ensure the strength of the reinforcing structure 20, it is desirable that the number of fiber-reinforced plastic layers be at least three.

[0038] Next, the structure for connecting the float 102 and the hull frame 104 will be described using Figure 4(B). In this embodiment, the float 102 and the hull frame 104 are detachably connected using a connecting member 30.

[0039] The connecting member 30 includes a bolt 31, a nut 32, and a washer 33. The washer 33 has a bottomed cylindrical shape and an opening at the bottom through which the bolt 31 is inserted. The washer 33 in this embodiment has a three-dimensional cylindrical shape, which provides high strength and improves the durability of the connecting member 30. However, the connecting member 30 is not limited to this example, and may be any member that can detachably connect the float 102 and the hull frame 104.

[0040] The connecting member 30 connects the bracket portion 15, which extends in the width direction of the float 102, to the hull frame 104. The bracket portion 15 is composed of a laminated structure of a fiber-reinforced plastic layer 11 that constitutes the upper surface 102a of the float 102 and a fiber-reinforced plastic layer 12 that constitutes the side surface 102b of the float 102. Specifically, in a plan view, the bracket portion 15 is composed of a laminated structure of fiber-reinforced plastic layers 11 and 12 that protrude in the width direction from the side surface 102b. The bracket portion 15 may be provided along the entire length of the float 102, but it is sufficient that it is provided at least at a position where the float 102 and the beam portion 104c of the hull frame 104 intersect. The bracket portion 15 is provided with an insertion hole 15a having a diameter that matches the threaded portion of the bolt 31.

[0041] The beam portion 104c of the hull frame 104 is provided with an opening 35 for inserting a bolt 31. The opening 35 has a first hole 35a with a diameter larger than the diameter of the bolt head 31, and a second hole 35b with a diameter that matches the threaded portion of the bolt 31. In other words, the head of the bolt 31 abuts against the bottom of the first hole 35a and stops there.

[0042] In the connecting structure described above, the bottom of the first hole 35a (beam portion 104c), the bracket portion 15 (fiber-reinforced plastic layers 11 and 12), and the washer 33 are fastened together with bolts 31 and nuts 32, thereby connecting the float 102 to the hull frame 104. In this embodiment, since the reinforcing structure 20 is provided at the upper end (corner portion) of the float 102, the strength of the float 102 against external forces can be improved. In particular, in this embodiment, since the float 102, whose upper surface 102a is flat, is connected to the hull frame 104 (specifically, the beam portion 104c), which also has a flat surface, improving the strength with the reinforcing structure 20 is significant in improving the durability of the ship 100.

[0043] Furthermore, since a bracket portion 15 integrated with the float 102 is used as the connecting portion that connects the float 102 to the hull frame 104, there is no need to provide screw holes in the body of the float 102, and the strength of the body of the float 102 is not compromised. In addition, since a cylindrical washer 33 is used as the connecting member 30, the durability of the connecting member 30 is also improved, making it possible to realize a highly reliable connecting structure.

[0044] As described above, the vessel 100 of this embodiment has a base section 100a in which the deck 106 is supported by a hull frame 104 made of a lightweight and corrosion-resistant metal material including aluminum, and a float 102 made of a highly durable fiber-reinforced plastic material. Furthermore, in the part where the float 102 and the hull frame 104 are connected, the vessel 100 of this embodiment employs a connection structure that improves the strength of the float 102 (especially the strength of the upper end) and is highly reliable, as described above. Therefore, according to this embodiment, it is possible to provide a raft-type vessel that is more durable than conventional vessels.

[0045] Although the present invention has been described above with reference to the drawings, the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention. Furthermore, the embodiments described above can be combined in any way, as long as no technical inconsistencies arise. [Explanation of symbols]

[0046] 11, 12…Fiber-reinforced plastic layer, 15…Bracket part, 15a…Through hole, 18…Reinforcement member, 20…Reinforcement structure, 21…Reinforcement member, 22~24…Fiber-reinforced plastic layer, 30…Connecting member, 31…Bolt, 32…Nut, 33…Washer, 35…Opening part, 35a…First hole, 35b…Second hole, 100…Ship, 100a…Base part, 102…Float, 102a…Top surface, 102b…Side surface, 102c…Bottom surface, 104…Hull frame, 104a…Frame part, 104b, 104c…Beam part, 106…Deck, 108…Guardrail, 110…Building, 110a…Support column, 110b…Roof

Claims

1. Multiple floats made of fiber-reinforced plastic material, A hull frame, which is connected to the aforementioned multiple floats and is made of a metal material including aluminum, A deck positioned on top of the aforementioned hull frame, Equipped with, The float has a bracket portion that extends in the width direction of the float, The bracket portion and the hull frame are detachably connected by a connecting member. The connecting member includes a bolt, nut and washer, The aforementioned washer is a raft-type vessel having a bottomed, cylindrical shape.

2. The aforementioned hull frame has a frame portion and a beam portion attached to the frame portion, The float has a longitudinal direction perpendicular to the beam portion, The vessel according to claim 1, wherein the bracket portion is provided at the position where the float and the beam portion intersect.

3. A plurality of floats made of fiber-reinforced plastic material, A hull frame, which is connected to the aforementioned multiple floats and is made of a metal material including aluminum, A deck positioned on top of the aforementioned hull frame, Equipped with, The float has a bracket portion that extends in the width direction of the float, The bracket portion and the hull frame are detachably connected by a connecting member. The bracket portion is composed of a laminated structure of a first fiber-reinforced plastic layer forming the upper surface of the float and a second fiber-reinforced plastic layer forming the side surface of the float, in a raft-type vessel.

4. A plurality of floats made of fiber-reinforced plastic material, A hull frame, which is connected to the aforementioned multiple floats and is made of a metal material including aluminum, A deck positioned on top of the aforementioned hull frame, Equipped with, A raft-type vessel, wherein the upper end of the float is provided with a reinforcing member and a plurality of fiber-reinforced plastic layers covering the reinforcing member.

5. The plurality of fiber-reinforced plastic layers have a laminated structure of at least three layers, The ship according to claim 4, wherein in the laminated structure of three or more layers, the layer furthest from the reinforcing member covers the edges of the other layers and is in contact with the inner surface of the float.

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