Ship

Abstract

To provide a ship capable of lowering the center of gravity of a hull while suppressing the deterioration of propulsion performance and a fuel consumption rate.SOLUTION: A ship comprises a near side deck part of a vehicle boarding side, a first inclined deck part inclined downward as heading toward the opposite side to the boarding side of the near side deck part, a boarding deck disposed on the opposite side to the boarding side of the first inclined deck part and having a depth side deck part, the vertical position of which is lower than the near side deck part, an upper deck disposed above the boarding deck, and a main deck installed between the depth side deck part of the boarding deck and the upper deck. Each of the space between the near side deck part and the upper deck and the space between the depth side deck part and the main deck is used for accommodating large vehicles. The space between the main deck and the upper deck part is used for accommodating regular vehicles.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a ship.

Background Art

[0002] Patent Document 1 discloses a ship in which the boarding deck of a vehicle forms the ceiling of an engine room that houses a main engine. In such a ship, in order to perform maintenance work such as piston removal of the main engine provided in the engine room, a space directly above the main engine is required, and a boarding deck height corresponding to the ceiling height of the engine room is required.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the case of a ship having a boarding deck as described in Patent Document 1 above, when the height of the main engine increases, the ceiling height of the engine room also increases, and the upper deck including the boarding deck located above the engine room is also arranged at a high position. Especially when loading a large vehicle such as a trailer, the center of gravity of the hull will become high. Since it is better for the center of gravity of the hull to be lower from the viewpoints of damage stability and the like, when the ceiling height of the engine room increases, measures such as widening the ship's width, loading ballast for lowering the center of gravity, and increasing the ship form fullness (increase in Cb value) are taken to lower the center of gravity of the hull. However, widening the hull, loading ballast, and increasing the ship form fullness all lead to an increase in steel materials and the like forming the hull, an increase in weight, etc., and there is a problem that the propulsion performance deteriorates and the fuel consumption rate also deteriorates. The present disclosure has been made in view of the above circumstances, and provides a ship capable of lowering the center of gravity of the hull while suppressing deterioration of propulsion performance and fuel consumption rate.

Means for Solving the Problems

[0005] To solve the above problems, the following configuration is adopted. According to one aspect of the present disclosure, a ship includes a front deck portion on the side where a vehicle enters, a first inclined deck portion that inclines downward as it goes toward the side opposite to the entering side of the front deck portion, and a rear deck portion that is disposed on the side opposite to the entering side of the first inclined deck portion and has a vertical position lower than that of the front deck portion, an entering deck; an upper deck disposed above the entering deck; and a middle deck provided between the rear deck portion of the entering deck and the upper deck. Each of the space between the front deck portion and the upper deck and the space between the rear deck portion and the middle deck is a large vehicle storage space, and the space between the middle deck and the upper deck is a vehicle storage space.

Advantages of the Invention

[0006] According to the ship according to the present disclosure, it is possible to lower the center of gravity of the hull while suppressing deterioration of propulsion performance and fuel consumption rate.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0008] Next, a ship according to an embodiment of the present disclosure will be described with reference to the drawings. In this embodiment, the case where the ship is a PCTC (Pure Car and Truck Carrier) will be described as an example, but the ship type is not limited to PCTC. The ship only needs to be able to carry vehicles, and for example, it can also be applied to RO-RO ships (Roll-on / Roll-off Ships), ferries, passenger ships, etc. <First Embodiment> FIG. 1 is a diagram showing a schematic configuration of a ship in the first embodiment of the present disclosure. FIG. 2 is a diagram of the embarkation deck in the first embodiment of the present disclosure as viewed from above. As shown in FIG. 1, the ship 100 in the first embodiment includes a hull 2 and a superstructure 3.

[0009] As shown in FIGS. 1 and 2, the hull 2 has side plates 4A, 4B, a bottom 5, a stern ramp (boarding area) 12A, a plurality of decks 10, and an engine room 20. The side plates 4A, 4B are composed of a pair of side outer plates that respectively constitute the left and right sides. The bottom 5 is composed of a bottom outer plate that connects these side plates 4A, 4B. The bottom 5 of this embodiment is a double bottom and is provided with an inner bottom plate 5B at an interval above the outer bottom plate 5A. The plurality of decks 10 are provided inside the hull 2 at intervals in the vertical direction. The plurality of decks 10 in this embodiment at least include an embarkation deck 10A, an upper deck 10B, a middle deck 10C, and an upper deck 10D.

[0010] The superstructure 3 is formed on the upper deck 10D (see FIG. 1), which is an all-through deck formed at the uppermost position among the plurality of decks 10. The superstructure 3 includes a bridge 3A and a living area 3B.

[0011] The stern ramp 12A is a shore ramp for loading and unloading cargo such as vehicles. The stern ramp 12A is provided at the stern 2A and is connected to the embarkation deck 10A arranged in the middle layer in the vertical direction among the plurality of decks 10. In this embodiment, the embarkation deck 10A is a watertight partition deck.

[0012] For example, when the stern ramp 12A is tilted and deployed with the ship 100 docked, vehicles such as passenger cars and trucks can drive themselves from the quay wall through the stern ramp 12A and board the boarding deck 10A, or drive themselves from the boarding deck 10A through the stern ramp 12A and disembark onto the quay wall. Note that the shore ramp is not limited to the stern ramp 12A. For example, a bow ramp (not shown) connected to the boarding deck 10A may be provided instead of the stern ramp 12A. The hull 2 of the present embodiment is illustrated as having only the stern ramp 12A, but may have both the stern ramp 12A and the bow ramp. Further, the hull 2 may be provided with a center ramp (not shown) in addition to at least one of the stern ramp 12A and the bow ramp (not shown). When a center ramp is provided, a boarding entrance connected to the boarding deck 10A or the deck 10 one level below the boarding deck 10A may be provided. Further, although the case where the stern ramp 12A is provided only on the side closer to the starboard side has been illustrated, the stern ramp 12A may be provided only on the side closer to the port side, or may be provided respectively at a position closer to the port side and a position closer to the starboard side.

[0013] The vehicle (not shown) that has boarded through the above-mentioned stern ramp 12A drives itself to a predetermined loading position set on the deck 10 of a predetermined floor via a rampway 13, which is an inclined path connecting the decks 10 adjacent to each other vertically, and stops. Then, the parked vehicle is secured by the passengers. The rampway 13 that connects downward from the boarding deck 10A, which is an adjacent deck, is, for example, a lift-type rampway or a rampway with a watertight door (including a cover) that can close the opening of the boarding deck 10A and make it watertight when not in use.

[0014] As shown in FIGS. 1 and 2, the engine room 20 is provided inside the hull 2. Specifically, the engine room 20 is provided below the boarding deck 10A. The engine room 20 of the present embodiment is partitioned on the side closer to the stern 2A than the center in the fore-and-aft direction FA of the hull 2. Further, the engine room 20 is partitioned below the boarding deck 10A and at the lowest level of the hull 2. The engine room 20 of the present embodiment is partitioned by the inner bottom plate 5B of the double bottom, the boarding deck 10A, the bow side partition 13A which is a transverse partition arranged apart from each other in the fore-and-aft direction FA, and the stern side partition 13B. The engine room 20 houses at least the main engine 9 and is a watertight compartment. The engine room 20 may be provided with a plurality of generators as auxiliary machines at a position closer to the stern 2A than the main engine 9.

[0015] The main engine 9 is capable of being driven using, for example, liquefied gas, heavy oil, etc. as fuel. The main engine 9 of the present embodiment is a so-called low-speed main engine, which is excellent in fuel consumption performance, while having a larger height dimension than so-called medium- and high-speed main engines, etc. The main engine 9 generates the propulsion force of the hull 2 by rotationally driving the screw 6 located below the stern 2A. A rudder 7 is provided behind the screw 6 of the ship 100 illustrated in the present embodiment, and the traveling direction of the hull 2 is controlled by this rudder 7. Although the case where the main engine 9 rotationally drives the screw 6 has been described, the configuration is not limited to this. For example, a configuration may be adopted in which the rotational energy of the main engine 9 is converted into electrical energy and the screw 6 is rotationally driven by an electric motor (not shown).

[0016] As shown in FIGS. 1 and 2, the boarding deck 10A includes a front side deck portion 15, a first inclined deck portion 16, and a rear side deck portion 17. The front deck portion 15 is disposed at a position on the boarding deck 10A that is the vehicle boarding side. The front deck portion 15 of the present embodiment is a portion formed on the stern 2A side in the fore-and-aft direction FA of the boarding deck 10A rather than the bow side partition 13A. That is, the portion 15A disposed between the bow side partition 13A and the stern side partition 13B in the front deck portion 15 forms the ceiling of the engine room 20. The portion 15A of the front deck portion 15 of the present embodiment that forms the ceiling of the engine room 20 extends horizontally, that is, parallel to the inner bottom plate 5B.

[0017] Also, in the present embodiment, among the front deck portion 15, the portion 15B disposed on the stern 2A side of the engine room 20 is inclined downward as it goes toward the stern 2A. In other words, the stern lamp 12A is disposed at a position lower in the vertical direction Dv (ship height direction) than the portion 15A, and the portion 15B is inclined toward the stern lamp 12A. The portion 15A of the front deck portion 15 that forms the ceiling of the engine room 20 is disposed at the highest position in the ship height direction of the boarding deck 10A. Note that the inclination of the portion 15B connected to the above-described stern lamp 12A may be provided as necessary.

[0018] The first inclined deck portion 16 slopes downward as it extends toward the side opposite to the boarding side of the front deck portion 15. In the present embodiment, the first inclined deck portion 16 slopes downward as it extends from the position of the bow side bulkhead 13A in the fore-and-aft direction FA, in other words, from the most bow 2F side position of the front deck portion 15, toward the bow 2F side. The first inclined deck portion 16 of the present embodiment slopes downward by the same dimension as the vertical dimension Dv of one vehicle accommodation space 31 described later. Here, the inclination angle of the first inclined deck portion 16 is set such that, for example, when a vehicle travels from the stern 2A side toward the bow 2F side on the boarding deck 10A, the vehicle body (for example, the bottom of the vehicle body, front and rear bumpers, etc.) does not contact the boarding deck 10A. The first inclined deck portion 16 of the present embodiment is configured not only to enable the vehicle to travel but also to be able to carry the vehicle. Although the case where the inclination angle of the first inclined deck portion 16 is constant has been illustrated, the inclined surface of the first inclined deck portion 16 may be an inclined surface combining a plurality of inclination angles, or may include a slightly curved curved surface or unevenness.

[0019] The rear deck portion 17 is arranged on the side opposite to the boarding side of the first inclined deck portion 16 and is lower in the vertical direction Dv than the front deck portion 15. In the present embodiment, the rear deck portion 17 is arranged on the side closer to the bow 2F than the first inclined deck portion 16. In other words, the rear deck portion 17 is the portion formed on the most bow 2F side of the boarding deck 10A. The rear deck portion 17 of the present embodiment extends parallel to the horizontal direction, that is, the inner bottom plate 5B.

[0020] As shown in FIG. 1, the upper deck 10B is arranged above the boarding deck 10A. The upper deck 10B of the present embodiment is a through deck arranged immediately above the boarding deck 10A. The space between the front deck portion 15 of the boarding deck 10A described above and the upper deck 10B is defined as the large vehicle accommodation space 30. Also in the present embodiment, the space between the upper deck 10B and the upper deck 10D is also defined as the large vehicle accommodation space 30. Here, the large vehicle accommodation space 30 is a space having a height capable of carrying large vehicles such as trucks and trailers.

[0021] The middle deck 10C is provided between the inner deck portion 17 of the boarding deck 10A and the upper deck 10B. In other words, the middle deck 10C is provided only on the bow 2F side of the front deck portion 15 of the boarding deck 10A in the fore-and-aft direction FA among the spaces between the boarding deck 10A and the upper deck 10B. The space between the middle deck 10C and the upper deck 10B forms a vehicle accommodation space for accommodating vehicles such as passenger cars smaller than large trucks. The boarding deck 10A and the middle deck 10C are connected by an interior ramp 18. The interior ramp 18 forms an inclined path along which vehicles can move by themselves between the boarding deck 10A and the middle deck 10C. As shown in FIG. 2, the interior ramp 18 of the present embodiment is formed at a position closer to the side 4B than the center in the ship width direction Dw.

[0022] In addition, the boarding deck 10A exemplified in the present embodiment is provided with an engine casing EC for guiding an exhaust gas pipe (not shown) such as the main engine 9 to the funnel F on the stern 2A side of the interior ramp 18. Further, a lower interior ramp 14 for forming a traveling path of vehicles connecting to the lower vehicle deck 10E is provided on the inner deck portion 17 on the bow 2F side of the interior ramp 18. The lower interior ramp 14 is also provided between the lower vehicle decks 10E in addition to the above. Note that the arrangement of the engine casing EC and the lower interior ramp 14 is an example and is not limited to the above arrangement.

[0023] The interior ramp 18 of the present embodiment forms an inclined path that slopes upward from the front deck portion 15 of the boarding deck 10A toward the bow 2F side and reaches the middle deck 10C. The interior ramp 18 of the present embodiment is connected to the edge on the stern 2A side of the middle deck 10C, but the position where the interior ramp 18 is connected is not limited to the edge on the stern 2A side of the middle deck 10C.

[0024] In addition, an upper interior ramp 19 is provided between the middle deck 10C and the upper deck 10B. The upper interior ramp 19 forms an inclined path along which vehicles including large trucks can move by themselves between the boarding deck 10A and the upper deck 10B.

[0025] Furthermore, the ship 100 of the present embodiment includes a lower vehicle deck 10E that forms a vehicle storage space 31 below the first inclined deck portion 16 and the rear deck portion 17 of the boarding deck 10A. The vehicle storage space 31 means a space having a height sufficient only for mounting vehicles such as passenger cars, but not sufficient for mounting large vehicles such as trucks and trailers. A plurality of lower vehicle decks 10E are provided at intervals in the vertical direction. The space between the rear deck portion 17 and the lower vehicle deck 10E and each space between adjacent lower vehicle decks 10E in the vertical direction are the vehicle storage spaces 31. Vehicles such as passenger cars can move by themselves from the deck 10 such as the rear deck portion 17 onto these lower vehicle decks 10E via an in-ship lamp (not shown).

[0026] <Operational Effect> In the ship 100 of the above first embodiment, a boarding deck 10A has a front deck portion 15 on the vehicle boarding side, a first inclined deck portion 16 that slopes downward as it goes toward the side opposite to the boarding side of the front deck portion 15, and a rear deck portion 17 that is disposed on the side opposite to the boarding side of the first inclined deck portion 16 and has a position lower in the vertical direction Dv than the front deck portion 15. The ship 100 includes an upper deck 10B disposed above the boarding deck 10A, a middle deck 10C provided between the rear deck portion 17 of the boarding deck 10A and the upper deck 10B, and an in-ship lamp 18 that forms an inclined path connecting the boarding deck 10A and the middle deck 10C. Each of the space between the front deck portion 15 and the upper deck 10B and the space between the rear deck portion 17 and the middle deck 10C is a large vehicle storage space 30, and the space between the middle deck 10C and the upper deck 10B is a vehicle storage space 31. As a result, the position of the rear deck portion 17 on the side opposite to the boarding side in the vertical direction Dv can be set lower than the front deck portion 15 on the boarding side. Furthermore, a large vehicle that has boarded the boarding deck 10A can be moved from the front deck portion 15 to the rear deck portion 17 via the first inclined deck portion 16 and mounted in the large vehicle storage space 30. Therefore, since the mounting position of the large vehicle on the boarding deck 10A can be lowered, it is possible to lower the center of gravity of the hull 2 while suppressing deterioration of propulsion performance due to measures such as widening the hull, loading ballast, and making the hull thicker. Furthermore, since the space between the middle deck 10C and the upper deck 10D above the rear deck portion 17 is used as the vehicle storage space 31 and the vehicle can move between the boarding deck 10A and the middle deck 10C by the ship's lamp 18, it is possible to suppress a decrease in the number of vehicles loaded as the position of the rear deck portion 17 in the vertical direction Dv is lowered.

[0027] In the first embodiment, it includes an engine room 20 provided below the boarding deck 10A for housing the main engine 9, and a stern ramp 12A provided on the boarding side of the vehicle for boarding and alighting the vehicle by self-running. The front deck portion 15 forms the ceiling of the engine room 20. As a result, the position of the large vehicle storage space 30 in the vertical direction Dv on the side opposite to the boarding side with respect to the engine room 20 can be set lower than the ceiling of the engine room 20. Therefore, it is possible to lower the center of gravity of the hull 2 while enabling operations such as piston extraction above the main engine 9 housed in the engine room 20.

[0028] In the first embodiment, the engine room 20 and the stern ramp 12A are provided on the stern 2A side in the fore-and-aft direction FA of the hull 2. The middle deck 10C, the first inclined deck portion 16, and the rear deck portion 17 of the boarding deck 10A are arranged on the bow 2F side in the fore-and-aft direction FA with respect to the engine room 20. As a result, in the case of a ship provided with the stern ramp 12A and the engine room 20 on the stern 2A side, it is possible to lower the center of gravity on the bow 2F side with respect to the engine room 20.

[0029] In the above-described first embodiment, the interior lamp 18 connecting the boarding deck 10A and the middle deck 10C forms an inclined path that inclines upward from the front-side deck portion 15 of the boarding deck 10A toward the bow 2F side and reaches the middle deck 10C. Thereby, the length of the interior lamp 18 connecting the boarding deck 10A and the middle deck 10C can be shortened. Therefore, an increase in the weight of the hull 2 can be suppressed.

[0030] In the above-described first embodiment, the ship further includes a lower vehicle deck 10E provided below the first inclined deck portion 16 and the rear-side deck portion 17 of the boarding deck 10A to form a vehicle storage space 31. Thereby, the space inside the hull 2 that is formed below the boarding deck 10A and whose dimension in the ship width direction Dw gradually decreases downward can be effectively used as a vehicle storage space 31 for mounting vehicles smaller than large vehicles.

[0031] <Second Embodiment> Next, a second embodiment of the present disclosure will be described with reference to the drawings. The ship of this second embodiment has a different upper deck configuration from the ship 100 of the first embodiment described above. Therefore, the same parts as those in the first embodiment described above will be denoted by the same reference numerals and described, and redundant descriptions will be omitted.

[0032] FIG. 3 is a diagram showing a schematic configuration of a ship in the second embodiment of the present disclosure. As shown in FIG. 3, the ship 200 in the second embodiment includes a hull 2 and an upper structure 3, similar to the ship 100 of the first embodiment described above. The hull 2 has side hulls 4A, 4B, a ship bottom 5, a stern lamp (boarding portion) 12A, a plurality of decks 10, and an engine room 20.

[0033] The hull 2 of the second embodiment includes at least a boarding deck 10A, an upper deck 101B, a middle deck 10C, and an upper deck 10D as the plurality of decks 10. The upper deck 101B includes a bow-side upper deck portion 41, a second inclined deck portion 42, and a stern-side upper deck portion 43.

[0034] The bow side upper deck part 41 is arranged above the middle deck 10C. That is, the bow side upper deck part 41 is arranged on the bow 2F side of the engine room 20. The bow side upper deck part 41 in this second embodiment is arranged between the middle deck 10C and the upper deck 10D. The space between the bow side upper deck part 41 and the upper deck 10D is the large vehicle storage space 30. The space between the middle deck 10C and the bow side upper deck part 41 is the vehicle storage space 31.

[0035] The second inclined deck part 42 is inclined downward from the bow side upper deck part 41 toward the stern 2A side. The second inclined deck part 42 is arranged on the bow 2F side of the engine room 20. The second inclined deck part 42 in this second embodiment is provided within the range where the interior lamp 18 is formed in the fore-and-aft direction FA of the ship. Also, the second inclined deck part 42 is inclined downward within the range where the dimension between the front side deck part 15 and the upper deck 101B in the vertical direction Dv can secure the height as the large vehicle storage space 30. Here, the inclination angle of the second inclined deck part 42 is the same as the inclination angle of the first inclined deck part 16. For example, when a vehicle travels from the bow 2F side to the stern 2A side over the bow side upper deck part 41, the inclination is such that the vehicle body (for example, the bottom of the vehicle body, the front and rear bumpers, etc.) does not contact the upper deck 101B.

[0036] The stern side upper deck part 43 is arranged on the stern 2A side of the second inclined deck part 42 and is lower in the vertical direction Dv than the bow side upper deck part 41. That is, due to the second inclined deck part 42 extending downward toward the stern 2A, it is lower in the vertical direction Dv than the bow side upper deck part 41. The space between the stern side upper deck part 43 and the upper deck 10D, which is another deck arranged above the stern side upper deck part 43, is the large vehicle storage space 30 capable of loading large vehicles.

[0037] <Function and Effect> In the ship 200 of the second embodiment described above, the upper deck 101B includes a bow-side upper deck portion 41 disposed above the middle deck 10C, a second inclined deck portion 42 that inclines downward as it extends from the bow-side upper deck portion 41 toward the stern 2A side and is disposed on the bow 2F side of the engine room 20, and a stern-side upper deck portion 43 disposed on the stern 2A side of the second inclined deck portion 42 and having a lower vertical direction Dv than the bow-side upper deck portion 41. And the space between the stern-side upper deck portion 43 and the upper deck 10D disposed above the stern-side upper deck portion 43 is defined as a large vehicle storage space 30. Thereby, the position of the large vehicle storage space 30 formed between the stern-side upper deck portion 43 and the upper deck 10D can be provided at a lower position in the vertical direction Dv than the position of the large vehicle storage space 30 formed between the bow-side upper deck portion 41 and the upper deck 10D. Therefore, in addition to the effects of the first embodiment described above, the mounting position of the large vehicle on the upper deck 101B can be further lowered, so that the center of gravity of the hull 2 can be further reduced.

[0038] <Third Embodiment> Next, a third embodiment of the present disclosure will be described with reference to the drawings. The ship of this third embodiment has a different arrangement of the upper deck 10D from the ship 100 of the first embodiment described above. Therefore, the same parts as those in the first embodiment described above will be denoted by the same reference numerals and described, and redundant descriptions will be omitted.

[0039] FIG. 4 is a diagram showing a schematic configuration of a ship in the third embodiment of the present disclosure. As shown in FIG. 4, the ship 300 in the third embodiment includes a hull 2 and an upper structure 3, similar to the ship 100 of the first embodiment described above. The hull 2 has side plates 4A, 4B, a bottom 5, a stern lamp (boarding area) 12A, a plurality of decks 10, and an engine room 20.

[0040] The hull 2 of the third embodiment includes at least a boarding deck 10A, a middle deck 10C, and an upper deck 101D as a plurality of decks 10. More specifically, in this third embodiment, the upper deck disposed above the boarding deck 10A forms the upper deck 101D (also referred to as an exposed deck) that is disposed highest among the through decks. Thereby, in the hull 2 of the ship 300, there is no other large vehicle storage space 30 above the large vehicle storage space 30 formed between the boarding deck 10A and the upper deck 101D as the upper deck located above the boarding deck 10A.

[0041] <Effect> Therefore, according to the ship 300 of the above-described third embodiment, in addition to the effects of the first embodiment, since large vehicles are not loaded on the deck 10 above the boarding deck 10A, a further reduction in the center of gravity of the hull 2 can be achieved.

[0042] (Other Embodiments) As described above, the embodiments of the present disclosure have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present disclosure are also included.

[0043] In each of the above-described embodiments, the case where the vehicle storage space 31 is provided below the boarding deck 10A has been described. However, the configuration may be such that the vehicle storage space 31 is not provided below the boarding deck 10A.

[0044] Furthermore, in each of the above-described embodiments, PCTC (Pure Car and Truck Carrier) has been described as an example. However, the present disclosure can also be applied to ships such as RO-RO (roll-on / roll-off ship), PCC (Pure Car Carrier), and ferry.

[0045] <Supplementary Note> The ship described in the embodiment is grasped as follows, for example.

[0046] (1) According to the first aspect, the ships 100, 200, 300 include a front deck portion 15 on the vehicle boarding side, a first inclined deck portion 16 that inclines downward as it goes toward the side opposite to the boarding side of the front deck portion 15, and a rear deck portion 17 that is disposed on the side opposite to the boarding side of the first inclined deck portion 16 and has a position in the vertical direction Dv lower than that of the front deck portion 15. The ships also include a boarding deck 10A having these components, an upper deck 10B disposed above the boarding deck 10A, a middle deck 10C provided between the rear deck portion 17 of the boarding deck 10A and the upper deck 10B, and an in-ship ramp 18 that forms an inclined path connecting the boarding deck 10A and the middle deck 10C. Each of the space between the front deck portion 15 and the upper deck 10B and the space between the rear deck portion 17 and the middle deck 10C is a large vehicle storage space 30, and the space between the middle deck 10C and the upper deck 10B is a vehicle storage space 31. Examples of the ship include PCTC, RO-RO ship, PCC, etc. An example of the boarding side is the stern side in the fore-and-aft direction of the ship. An example of the side opposite to the boarding side is the bow side in the fore-and-aft direction of the ship.

[0047] Thereby, the position of the rear deck portion 17 in the vertical direction Dv on the side opposite to the boarding side can be made lower than that of the front deck portion 15 on the boarding side. Furthermore, a large vehicle that has boarded the boarding deck 10A can be moved from the front deck portion 15 through the first inclined deck portion 16 to the rear deck portion 17 and loaded into the large vehicle storage space 30. Therefore, since the loading position of the large vehicle on the boarding deck 10A can be lowered, it is possible to lower the center of gravity of the hull 2 while suppressing the deterioration of the propulsion performance due to measures such as widening the hull, loading ballast, and making the hull thicker. Further, since the space between the middle deck 10C and the upper deck 10D above the rear deck portion 17 is used as the vehicle storage space 31 and the vehicle can move between the boarding deck 10A and the middle deck 10C by the in-ship ramp 18, it is possible to suppress a decrease in the number of vehicles loaded due to the lowering of the position of the rear deck portion 17 in the vertical direction Dv.

[0048] (2) According to the second aspect, the ship is the ship of (1), and includes an engine room 20 provided below the boarding deck 10A for housing the main engine, and a boarding and alighting section provided on the boarding side of the vehicle for boarding and alighting the vehicle by self-propulsion. The front side deck section 15 forms the ceiling of the engine room 20. An example of the boarding and alighting section is a stern ramp. Thereby, the position of the large vehicle storage space 30 in the vertical direction Dv on the side opposite to the boarding side with respect to the engine room 20 can be set lower than the ceiling of the engine room 20. Therefore, while enabling operations such as piston extraction above the main engine 9 housed in the engine room 20, the center of gravity of the hull 2 can be lowered.

[0049] (3) According to the third aspect, the ship is the ship of (2), and the engine room 20 and the boarding and alighting section are provided on the stern 2A side in the fore-and-aft direction FA of the hull. The middle deck 10C, the first inclined deck section 16, and the rear side deck section 17 of the boarding deck 10A are arranged on the bow 2F side in the fore-and-aft direction FA with respect to the engine room 20. Thereby, in the case of a ship having a stern ramp 12A and an engine room 20 on the stern 2A side, the center of gravity on the bow 2F side with respect to the engine room 20 can be lowered.

[0050] (4) According to the fourth aspect, the ship is any one of the ships of (1) to (3), and the upper deck 10B includes a bow side upper deck section 41 arranged above the middle deck 10C, a second inclined deck section 42 that inclines downward as it goes from the bow side upper deck section 41 toward the stern 2A side and is arranged on the bow 2F side with respect to the engine room 20, and a stern side upper deck section 43 arranged on the stern 2A side of the second inclined deck section 42 and having a lower vertical position than the bow side upper deck section 41. The space between the stern side upper deck section 43 and another deck 10D arranged above the stern side upper deck section 43 is the large vehicle storage space 30. An example of the other deck is the upper deck. As a result, the position of the large vehicle storage space 30 formed between the upper deck portion 43 on the stern side and the other deck 10D can be provided at a lower position in the vertical direction Dv than the position of the large vehicle storage space 30 formed between the upper deck portion 41 on the bow side and the other deck 10D. Therefore, in addition to the effects of the first embodiment, since the mounting position of the large vehicle on the upper deck 101B can be further lowered, it is possible to further lower the center of gravity of the hull 2.

[0051] (5) According to the fifth aspect, the ship is any one of the ships of (1) to (3), and the internal lamp 18 connecting the boarding deck 10A and the middle deck 10C forms an inclined path that inclines upward from the front side deck portion 15 of the boarding deck 10A toward the bow 2F side and reaches the middle deck 10C. As a result, the length of the internal lamp 18 connecting the boarding deck 10A and the middle deck 10C can be shortened. Therefore, an increase in the weight of the hull 2 can be suppressed.

[0052] (6) According to the sixth aspect, the ship is the ship of (1) to (4), and the upper deck 10B forms the upper deck 101D arranged at the uppermost position among the through decks. As a result, since large vehicles are not loaded on the deck 10 above the boarding deck 10A, a further reduction in the center of gravity of the hull 2 can be achieved.

[0053] (7) According to the seventh aspect, the ship is the ship of (1) to (6), and further includes a lower vehicle deck 10E provided below the first inclined deck portion 16 and the rear side deck portion 17 of the boarding deck 10A to form the vehicle storage space 31. As a result, the space inside the hull 2 formed below the boarding deck 10A and gradually decreasing in dimension in the ship width direction Dw downward can be effectively used as the vehicle storage space 31 for loading vehicles smaller than large vehicles.

Explanation of Reference Numerals

[0054] 2…Hull 3…Superstructure 3A…Bridge 3B…Residential area 4A, 4B…Side shell 5…Bottom 5A…Outer bottom plate 5B…Inner bottom plate 9…Main engine 10…Deck 10A…Embarkation deck 10B, 101B…Upper deck 10C…Middle deck 10D, 101D…Upper deck 10E…Lower vehicle deck 12A…Stern lamp 13A…Bow side bulkhead 13B…Stern side bulkhead 14…Lower interior lamp 15…Forward side deck section 15A, 15B…Portion 16…First inclined deck section 17…Rear side deck section 18…Interior lamp 19…Upper interior lamp 20…Engine room 30…Large vehicle storage space 31…Vehicle storage space 41…Bow side upper deck section 42…Second inclined deck section 43…Stern side upper deck section 100, 200, 300…Ship EC…Engine casing F…Funnel

Claims

1. A boarding deck having a front deck portion on the boarding side of the vehicle, a first inclined deck portion that inclines downward as it goes toward the side opposite to the boarding side of the front deck portion, and a rear deck portion that is disposed on the side opposite to the boarding side of the first inclined deck portion and is lower in the vertical direction than the front deck portion; An upper deck disposed above the boarding deck; A middle deck provided between the rear deck portion of the boarding deck and the upper deck; An in-ship ramp that forms an inclined path connecting the boarding deck and the middle deck; and comprising; Each of the space between the front deck portion and the upper deck and the space between the rear deck portion and the middle deck is a large vehicle storage space; The space between the middle deck and the upper deck is a vehicle storage space A ship.

2. An engine room provided below the boarding deck for housing a main engine; A boarding and alighting portion provided on the boarding side of the vehicle for boarding and alighting the vehicle by self-propulsion, and comprising; The front deck portion forms the ceiling of the engine room The ship according to claim 1.

3. The engine room and the boarding and alighting portion are provided on the stern side in the fore-and-aft direction of the hull, The middle deck, the first inclined deck portion, and the rear deck portion of the boarding deck are arranged on the bow side in the fore-and-aft direction relative to the engine room The ship according to claim 2.

4. The upper deck is A bow-side upper deck portion disposed above the middle deck; A second inclined deck portion that inclines downward as it goes from the bow-side upper deck portion toward the stern side and is disposed on the bow side relative to the engine room; A ship's stern upper deck portion disposed on the stern side of the second inclined deck portion and having a vertical position lower than that of the bow side upper deck portion. The space between the ship's stern upper deck portion and another deck disposed above the ship's stern upper deck portion is defined as the large vehicle storage space. The ship according to claim 3.

5. The in-ship lamp connecting the boarding deck and the middle deck inclines upward as it goes toward the bow side from the front side deck portion of the boarding deck, forming an inclined path leading to the middle deck. The ship according to claim 3.

6. The upper deck forms the uppermost deck among the through decks. The ship according to claim 1.

7. The ship further includes a lower vehicle deck provided below the first inclined deck portion and the rear side deck portion of the boarding deck to form the vehicle storage space. The ship according to claim 1.

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