Watercraft

Abstract

To suppress labor for attaching and detaching a protective fence and to effectively utilize a space in a hull.SOLUTION: The marine vessel includes a hull, a deck provided in the hull and including an opening vertically penetrating the deck, a slope obliquely extending from below the deck and connected to an upper surface of the deck through the opening, an opening / closing member connected to the opening between a closed position for closing the opening and an open position for opening the opening such that a first end on one side in a first direction along the deck is rotatable about an axis extending in a second direction along the deck and intersecting the first direction, and a protective fence housed inside the opening and below the opening in a plan view when the opening / closing member is at the closed position.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to marine vessels. [Background technology]

[0002] Patent Document 1 discloses a protective fence comprising a shape-retaining plate with fasteners attached to the peripheral edge of an opening (deck hatch) formed in the deck, a plurality of support tubes attached to the outer surface of the shape-retaining plate, rope supports that can be inserted and removed from the support tubes, and safety ropes stretched around the rope supports. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 5-37680 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the configuration described in Patent Document 1, when a deck hatch is equipped with an opening / closing lid, a protective fence must be installed around the periphery of the opening when the opening / closing lid is open. However, if the protective fence remains installed around the periphery of the opening after the opening / closing lid is closed, it may get in the way when loading vehicles, etc. onto the deck. For this reason, the protective fence is sometimes removed to ensure space for loading vehicles, etc. However, this requires the effort of attaching and detaching the protective fence, and requires space to store the removed protective fence, which hinders the effective use of space within the hull.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a ship that reduces the effort required to attach and remove protective fences and makes effective use of the space inside the hull. [Means for solving the problem]

[0006] In order to solve the above problems, a vessel according to the present disclosure includes a hull, a deck, a slope, an opening / closing member, a drive unit, and a protective fence. The deck is provided within the hull and has an opening that penetrates vertically. The slope extends obliquely from below the deck and is connected to the upper surface of the deck via the opening. The opening / closing member is connected to the opening so that a first end on one side in a first direction along the deck can rotate about an axis extending along the deck and in a second direction intersecting the first direction between a closed position that closes the opening and an open position that opens the opening. The drive unit drives the opening / closing member between the closed position and the open position. The protective fence is housed inside the opening and below the opening / closing member in a plan view when the opening / closing member is in the closed position. When the opening / closing member moves to the open position, the protective fence rises upward at a peripheral portion of the opening on at least one side in the second direction in conjunction with the opening / closing member. [Effects of the Invention]

[0007] According to the vessel of the present disclosure, the effort required to attach and detach protective fences can be reduced and the space inside the hull can be used more effectively. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a side view of a floating body equipped with a vessel according to an embodiment of the present disclosure. [Figure 2] 1 is a side cross-sectional view showing a ramp, an opening / closing member, and a protective fence provided on a vessel according to an embodiment of the present disclosure. FIG. [Figure 3] FIG. 2 is a plan view showing an opening and an opening / closing member of the marine vessel according to the embodiment of the present disclosure. [Figure 4] 1 is a side cross-sectional view showing a state in which an opening / closing member of a marine vessel according to an embodiment of the present disclosure is in an open position. [Figure 5] 1 is a view of an opening / closing member and a protective fence of a vessel according to an embodiment of the present disclosure, viewed from the bow and stern. FIG. [Figure 6]1 is a cross-sectional view of a marine vessel according to an embodiment of the present disclosure, viewed from the bow and stern, with an opening / closing member in a closed position. FIG. [Figure 7] FIG. 10 is a plan view showing an opening / closing member and a protective fence of a vessel according to a modified example of an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a vessel according to an embodiment of the present disclosure will be described with reference to FIGS. (Vessel configuration) As shown in Fig. 1, the ship 1 of this embodiment mainly comprises a hull 2, a slope 11, and an opening / closing member 20 (see Fig. 2). The type of ship 1 is not limited to a specific one as long as it is capable of carrying vehicles. Examples of the type of ship 1 include a ferry, a RORO ship (roll-on / roll-off ship), and a PCTC (pure car & truck carrier).

[0010] (Hull configuration) The hull 2 ​​has a pair of side walls 3A, 3B that form its outer shell, a ship bottom 4, and an upper deck 5. The upper deck 5 illustrated in this embodiment is a full-length deck that is exposed to the outside. The hull 2 ​​is formed with a superstructure 7 that has accommodation areas.

[0011] The hull 2 ​​is equipped with multiple decks inside, including a freeboard deck 8. The freeboard deck 8 in this embodiment is the lowest of the full-length decks located above the load waterline. The freeboard deck 8 in this embodiment is also a vehicle deck on which vehicles can be loaded.

[0012] At least some of the multiple deck levels are vehicle decks 9. Vehicles can be loaded onto the vehicle decks 9. In this embodiment, the vehicle decks 9 are provided, for example, below the freeboard deck 8 at intervals. Note that the vehicle decks 9 may be provided in multiple levels at intervals in the vertical direction Dv.

[0013] FIG. 2 is a cross-sectional view showing a ramp, an opening / closing member, and a protective fence provided on a vessel according to an embodiment of the present disclosure. As shown in Figures 1 and 2, the slope 11 spans between the freeboard deck 8 and the vehicle deck 9 via an opening 10, which will be described later. The slope 11 extends in a first direction D1 when viewed from above. In this embodiment, the slope 11 is arranged so that the first direction D1 is aligned with the fore-aft direction FA. In other words, the slope 11 extends in the fore-aft direction FA when viewed from above. The slope 11 extends obliquely upward from the vehicle deck 9 below the freeboard deck 8 toward the freeboard deck 8.

[0014] As shown in Figure 2, a lower end 11b on one side of the slope 11 in the first direction D1 is connected to the vehicle deck 9. An upper surface of the lower end 11b is continuous with the upper surface of the vehicle deck 9. An upper end 11a on the other side of the slope 11 in the first direction D1 is connected to the freeboard deck 8 at the other end of the opening 10 in the first direction D1. An upper surface of the upper end 11a is continuous with the upper surface 8t of the freeboard deck 8.

[0015] FIG. 3 is a plan view showing an opening and an opening / closing member of the marine vessel according to the embodiment of the present disclosure. The opening 10 is formed in the freeboard deck 8. The opening 10 penetrates the freeboard deck 8 from top to bottom. As shown in FIG. 3 , the opening 10 has a long side in a first direction D1 when viewed from above, and a short side in a second direction D2 that intersects with the first direction D1 in an imaginary plane along the upper surface 8t of the freeboard deck 8. In other words, the shape of the opening 10 in a plan view is substantially rectangular. In the opening 10 of this embodiment, the first direction D1 is the fore-aft direction FA, and the second direction D2 is the ship's width direction W. The opening 10 is formed in a position that overlaps with at least a portion of the slope 11 when viewed from above.

[0016] As shown in Figures 2 and 3, the opening / closing member 20 is provided so as to be able to close the opening 10. When the opening 10 is closed, the freeboard deck 8 becomes a watertight bulkhead deck. When viewed from above, the opening / closing member 20 has a long side in a first direction D1 (fore-aft direction FA) and a short side in a second direction D2 (width direction W). In other words, the shape of the opening / closing member 20 in a plan view is substantially rectangular, similar to the opening 10. A first end 20a of the opening / closing member 20 on one side in the first direction D1 is connected to an end 10a of the opening 10 on one side in the first direction D1 via a hinge mechanism or the like so as to be rotatable about an axis extending in the second direction D2.

[0017] FIG. 4 is a side cross-sectional view showing a state in which the opening / closing member of the marine vessel according to the embodiment of the present disclosure is in the open position. As shown in Figures 2 and 4, the opening / closing member 20 is rotatable between a closing position P1 (see Figure 2) in which it closes the opening 10 and an opening position P2 (see Figure 4) in which it opens the opening 10.

[0018] As shown in Fig. 2, the upper surface 20t of the opening / closing member 20 in the closed position P1 is continuous with the upper surface 8t of the freeboard deck. As shown in Fig. 4, the first end 20a of the opening / closing member 20 in the open position P2 is disposed at the same position as the freeboard deck 8 in the vertical direction Dv, and the second end 20b on the other side in the first direction D1 is spaced above the freeboard deck 8 in the vertical direction Dv. Here, when the opening / closing member 20 is in the open position P2, a vehicle (not shown) travels on the slope 11 through the opening 10 to move between the freeboard deck 8 and the vehicle deck 9. At this time, the vehicle passes below the opening / closing member 20.

[0019] 4, the drive unit 25 generates a drive force for displacing the opening / closing member 20 between the closed position P1 and the open position P2. The drive unit 25 includes, for example, hydraulic cylinders 25d provided on both sides of the opening / closing member 20 in the second direction D2. The lower ends of these hydraulic cylinders 25d are connected, for example, to both ends of the slope 11 in the second direction D2. The lower ends of each hydraulic cylinder 25d are connected to the slope 11 so as to be rotatable about an axis extending in the second direction D2.

[0020] The upper end of the hydraulic cylinder 25d is connected to the lower surface of the opening / closing member 20 so as to be rotatable about an axis extending in the second direction D2. By extending and contracting each hydraulic cylinder 25d, the opening / closing member 20 is opened and closed between a closed position P1 and an open position P2. Note that the drive unit 25 is not limited to the hydraulic cylinder 25d, and other mechanisms may be used as appropriate as long as the drive unit 25 can displace the opening / closing member 20 between the closed position P1 and the open position P2.

[0021] FIG. 5 is a view of an opening / closing member and a protective fence of a vessel according to an embodiment of the present disclosure, viewed from the bow and stern. 3 and 5, the protective fences 30 are provided at positions on both sides of the opening / closing member 20 in the second direction D2 and on both sides of the opening 10. Specifically, the protective fences 30 are provided between the peripheral edge portions 10s on both sides of the opening 10 in the second direction D2 and the end portions 20s of the opening / closing member 20 on both sides in the second direction D2. Each protective fence 30 is provided between the peripheral edge portions 10s of the opening 10 and the end portions 20s of the opening / closing member 20 so as to be foldable and unfoldable in the up-down direction Dv in conjunction with the opening and closing of the opening / closing member 20.

[0022] 3 to 5, the protective fence 30 of this embodiment includes a frame portion 31 and a protective member 35. The frame portion 31 is provided between the peripheral edge portion 10s of the opening 10 and the end portion 20s of the opening / closing member 20 so as to be foldable toward the inside of the opening 10 in the second direction D2. The frame portion 31 includes a first frame 311, a second frame 312, and a third frame 313.

[0023] An upper end of the first frame 311 is rotatably connected to the vicinity of the second end 20b of the opening / closing member 20 via a universal joint such as a knuckle joint. The first frame 311 extends downward when the opening / closing member 20 is in the open position P2.

[0024] The lower end of the second frame 312 is rotatably connected to the vicinity of the end 10b of the opening 10 on the other side in the first direction D1 via a universal joint such as a knuckle joint. The second frame 312 extends upward when the opening / closing member 20 is in the open position P2. The upper end of the second frame 312 is rotatably connected to the lower end of the first frame 311 via a universal joint such as a knuckle joint.

[0025] One end of the third frame 313 is rotatably connected to the first end 20a of the opening / closing member 20 via a universal joint such as a knuckle joint. The other end of the third frame 313 is rotatably connected to the lower end of the first frame 311 and the upper end of the second frame 312 via universal joints such as a knuckle joint.

[0026] As shown in FIG. 4 , the protective member 35 is stretched across the frame portion 31. In this embodiment, for example, a rope 35r is provided as the protective member 35. A plurality of ropes 35r are provided at intervals in the extension direction of the third frame 313, for example, between the peripheral edge 10s of the opening 10 and the third frame 313, and between the third frame 313 and the end 20s of the opening / closing member 20. Further, the ropes 35r are provided, for example, between the first end 20a of the opening / closing member 20 and the middle part of the first frame 311, and between the first end 20a of the opening / closing member 20 and the middle part of the second frame 312. Note that the number and arrangement of the ropes 35r can be changed as appropriate.

[0027] FIG. 6 is a cross-sectional view of the marine vessel according to the embodiment of the present disclosure, viewed from the bow and stern, with the opening / closing member in the closed position. As shown in FIGS. 2, 3, and 5, when the opening / closing member 20 is in the closed position P1, the protective fence 30 is housed inside the opening 10 and below the opening / closing member 20 in a plan view. As shown in FIGS. 4 and 5, when the opening / closing member 20 moves from the closed position P1 to the open position P2, the protective fence 30 unfolds in conjunction with the opening / closing member 20 and rises upward from the peripheral edge 10s. This prevents workers or vehicle drivers from accidentally entering the opening 10 when walking around the opening 10. Here, in the open position P2, the first frame 311 and the second frame 312 of the protective fence 30 are preferably slightly bent inward of the opening 10 in the second direction D2. This allows the protective fence 30 to be easily folded inward of the opening 10 in the second direction D2 when the opening / closing member 20 is rotated from the open position P2 to the closed position P1.

[0028] (Action and effect) In the vessel 1 of the above embodiment, when the opening / closing member 20 moves to the open position P2, the protective fence 30 rises upward at the peripheral portions 10s on both sides of the opening 10 in the second direction D2 in conjunction with the opening / closing member 20. Furthermore, when the opening / closing member 20 is in the closed position P1, the protective fence 30 is stored inside the opening 10 and below the opening / closing member 20 in a plan view. This eliminates the need to attach or detach the protective fence 30 when opening or closing the opening / closing member 20 between the closed position P1 and the open position P2. Furthermore, when the opening / closing member 20 is in the closed position P1, no space is required to store the protective fence 30. As a result, the effort required to attach and detach the protective fence 30 is reduced and the space inside the hull 2 ​​can be used more effectively.

[0029] In the above embodiment, the protective fence 30 is provided between the peripheral edge 10s of the opening 10 and the end 20s in the second direction D2 of the opening / closing member 20 so as to be foldable in the second direction D2 toward the inside of the opening 10. As a result, when the opening / closing member 20 is in the closed position P1, the protective fence 30 is stored inside the opening 10 and below the opening / closing member 20 in a plan view.

[0030] Furthermore, in the above embodiment, the protective fence 30 includes a frame portion 31 that is foldable toward the inside of the opening 10 in the second direction D2, and a protective member 35 that is stretched across the frame portion 31. This allows the protective fence 30 to have a simple configuration.

[0031] In addition, in the above embodiment, by providing a rope 35r as a protective member 35 in the gap between the peripheral edge 10s of the opening 10, the end 20s of the opening / closing member 20, and the frame portion 31, it is possible to prevent people from entering the inside of the opening 10 from around the opening 10 with a simple configuration.

[0032] Furthermore, in the above embodiment, by providing a protective member 35 on at least a portion of the lower side of the protective fence 30, the feet of people around the opening 10 can be prevented from entering inside the opening 10, thereby preventing people from entering inside the opening 10.

[0033] Furthermore, in the above embodiment, when the opening / closing member 20 moves from the open position P2 to the closed position P1, the first frame 311 and the second frame 312 are folded inward of the opening 10 in the second direction D2. At this time, the third frame 313 swings about one end connected to the first end 20a of the opening / closing member 20 as the connecting portion between the lower end of the first frame 311 and the upper end of the second frame 312 moves downward and inward of the opening 10 in the second direction D2. In this way, the protective fence 30, which is housed inside the opening 10 and below the opening / closing member 20 in a plan view when the opening / closing member 20 is in the closed position P1, and which rises upward at the peripheral portions 10s on both sides of the opening 10 in the second direction D2 in conjunction with the opening / closing member 20 when the opening / closing member 20 moves to the open position P2, can be operated with a simple configuration.

[0034] (Modification of the embodiment) FIG. 7 is a plan view showing an opening / closing member and a protective fence of a vessel according to a modified example of an embodiment of the present disclosure. In the above embodiment, the protective fences 30 are provided on both sides in the second direction D2 of the opening / closing member 20 and the opening 10. If the width dimensions in the second direction D2 of the opening / closing member 20 and the opening 10 are small, the protective fences 30 at the blocking position P1 on both sides in the second direction D2 may interfere with each other. In such a case, for example, as shown in Figure 7, the lengths of the first frame 311, the second frame 312, and the third frame 313 may be set so that the connection portion J between the first frame 311, the second frame 312, and the third frame 313 differs in the fore-and-aft direction FA between the protective fence 30 on one side in the second direction D2 and the protective fence 30 on the other side in the second direction D2. This may allow the protective fences 30 at the blocking position P1 on both sides in the second direction D2 to be prevented from interfering with each other.

[0035] (Other embodiments) The above describes in detail the embodiments of the present disclosure with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes and the like are also included within the scope that does not deviate from the gist of the present disclosure. In the above embodiment, the protective member 35 is, for example, a rope 35r, but is not limited to this. The protective member 35 may include at least one of a rope, a chain, a net, a flexible sheet material, and a plate material.

[0036] Furthermore, in the above embodiment, the protective member 35 is provided in the gap between the peripheral edge 10s of the opening 10, the end 20s of the opening / closing member 20, and the frame portion 31, but the protective member 35 may be provided in at least a portion below the protective fence 30. In other words, the protective member 35 may be provided, for example, only between the peripheral edge 10s of the opening 10 and the third frame 313 of the frame portion 31.

[0037] In the above embodiment, the protective fence 30 includes the frame portion 31 and the protective member 35, but this is not limiting. For example, instead of the frame portion 31 and the protective member 35, a foldable plate material may be provided.

[0038] Furthermore, in the above embodiment, the protective fence 30 is configured to be foldable in the vertical direction Dv, but the specific configuration can be changed as appropriate. For example, the protective fence 30 may be configured in an accordion-like shape that is foldable in the vertical direction Dv.

[0039] Furthermore, in the above embodiment, the protective fences 30 are provided on both sides of the opening / closing member 20 and the opening 10 in the second direction D2. For example, if the opening / closing member 20 and the opening 10 are provided adjacent to the ship's sides 3A, 3B or a wall provided inside the hull 2, the protective fence 30 may be provided only on the side of the opening / closing member 20 and the opening 10 opposite the ship's sides 3A, 3B or the wall with respect to the second direction D2.

[0040] <Additional Notes> The ship 1 described in the embodiment can be understood, for example, as follows.

[0041] (1) A vessel 1 according to a first aspect of the present invention comprises a hull 2, a deck 8 provided within the hull 2 ​​and having an opening 10 penetrating vertically, a slope 11 extending obliquely from below the deck 8 and connected to the upper surface of the deck 8 via the opening 10, and a first end 20a of the slope 11 on one side of a first direction D1 along the deck 8, which is rotatable about an axis extending along the deck 8 and in a second direction D2 intersecting the first direction, between a closing position P1 that closes the opening 10 and an opening position P2 that opens the opening 10. The device comprises an opening / closing member 20 connected to the opening 10, a drive unit 25 that drives the opening / closing member 20 between the closed position P1 and the open position P2, and a protective fence 30 that is housed inside the opening 10 and below the opening / closing member 20 in a planar view when the opening / closing member 20 is in the closed position P1, and that rises upward at a peripheral portion 10s on at least one side of the opening 10 in the second direction D2 in conjunction with the opening / closing member 20 when the opening / closing member 20 moves to the open position P2. Examples of decks include freeboard decks, vehicle decks, and bulkhead decks.

[0042] With this configuration, there is no need to attach or detach the protective fence 30 when opening or closing the opening / closing member 20 between the closed position P1 and the open position P2. Furthermore, when the opening / closing member 20 is in the closed position P1, there is no need for a place to store the protective fence 30. As a result, the effort required to attach and detach the protective fence 30 is reduced, and the space inside the hull 2 ​​can be used more effectively.

[0043] (2) The ship 1 according to the second aspect is the ship 1 of (1), wherein the protective fence 30 is arranged between the peripheral portion 10s on at least one side of the opening 10 in the second direction D2 and the end portion 20s on at least one side of the opening / closing member 20 in the second direction D2, and is foldable toward the inside of the opening 10 in the second direction D2.

[0044] With this configuration, when the opening / closing member 20 is in the closed position P1, the protective fence 30 is housed inside the opening 10 and below the opening / closing member 20 in a plan view.

[0045] (3) The ship 1 according to the third aspect is the ship 1 of (2), wherein the protective fence 30 comprises a frame portion 31 arranged between the peripheral portion 10s and at least one end 20s of the opening / closing member 20 in the second direction D2, and capable of being folded toward the inside of the opening 10 in the second direction D2, and a protective member 35 stretched on the frame portion 31.

[0046] By configuring it in this way, the protective fence 30 can be made to have a simple configuration.

[0047] (4) The ship 1 according to a fourth aspect is the ship 1 of (3), in which the protective member 35 includes at least one of a rope, a chain, a net, a flexible sheet material, and a plate material.

[0048] By configuring in this way, it is possible to prevent people from entering the inside of the opening 10 from the periphery of the opening 10 with a simple configuration.

[0049] (5) The ship 1 according to a fifth aspect is the ship 1 of (4), in which the protective member 35 is provided at least in a part below the protective fence 30.

[0050] With this configuration, the feet of a person around the opening 10 can be prevented from entering inside the opening 10, and the person can be prevented from entering inside the opening 10.

[0051] (6) The vessel 1 according to the sixth aspect is any one of the vessels 1 of (3) to (5), wherein the frame portion 31 comprises a first frame 311 whose upper end is rotatably connected to the other end of the opening / closing member 20 and extends downward when the opening / closing member 20 is in the open position P2, a second frame 312 whose lower end is rotatably connected to the other end of the opening 10 and extends upward, and whose upper end is rotatably connected to the lower end of the first frame 311, and a third frame 313 whose one end is rotatably connected to the first end 20a of the opening / closing member 20 and whose other end is rotatably connected to the lower end of the first frame 311 and the upper end of the second frame 312.

[0052] With this configuration, when the opening / closing member 20 moves from the open position P2 to the closed position P1, the first frame 311 and the second frame 312 are folded inward of the opening 10 in the second direction D2. At this time, the third frame 313 rotates about one end connected to the first end 20a of the opening / closing member 20 as the connecting portion between the lower end of the first frame 311 and the upper end of the second frame 312 moves downward and inward of the opening 10 in the second direction D2. In this way, the protective fence 30 can be simply configured to be housed inside the opening 10 and below the opening / closing member 20 in a plan view when the opening / closing member 20 is in the closed position P1, and to rise upward at the peripheral portion 10s on at least one side of the opening 10 in the second direction D2 in conjunction with the opening / closing member 20 when the opening / closing member 20 moves to the open position P2. [Explanation of symbols]

[0053] 1...Ship 2...Hull 3A, 3B...Side 4... Bottom of the ship 5...Upper deck 7...Superstructure 8...Freeboard deck (deck, vehicle deck) 8t…Top surface 9...Vehicle deck 10...Opening 10a, 10b...ends 10s...periphery 11...Slope 11a...Top end 11b...lower end 20...Opening and closing member 20a...first end 20b…Second end 20s...end 20t…Top surface 25...Drive unit 25d...Hydraulic cylinder 26...Support member 30...protective fence 31...Frame section 35...Protective material 35r…Rope 311...First frame 312...Second frame 313...Third frame P1…Occluded position P2…open position

Claims

1. The hull and A deck provided in the hull and having an opening penetrating vertically; A slope extending obliquely from below the deck and connected to the upper surface of the deck through the opening; an opening / closing member, the opening end of which is connected to the opening and which is rotatable about an axis extending along the deck and in a second direction intersecting the first direction, between a closing position where the opening is closed and an opening position where the opening is opened; a drive unit that drives the opening / closing member between the closed position and the open position; a protective fence that is housed inside the opening and below the opening / closing member in a plan view when the opening / closing member is in the closed position, and that rises upward at a peripheral portion of at least one side of the opening in the second direction in conjunction with the opening / closing member when the opening / closing member moves to the open position; A vessel equipped with:

2. The protective fence is provided between the peripheral edge portion on at least one side of the opening in the second direction and an end portion on at least one side of the opening / closing member in the second direction, and is foldable toward the inside of the opening in the second direction.

2. The watercraft of claim 1.

3. The protective fence is a frame portion provided between the peripheral edge portion and at least one end of the opening / closing member in the second direction and foldable toward the inside of the opening in the second direction; a protective member stretched over the frame portion; 3. The watercraft of claim 2.

4. The protective member includes at least one of a rope, a chain, a net, a flexible sheet material, and a plate material.

4. The watercraft of claim 3.

5. The protective member is provided at least partially below the protective fence.

5. A watercraft according to claim 4.

6. When the opening / closing member is in the open position, the frame portion a first frame whose upper end is rotatably connected to the other end of the opening / closing member and extends downward; a second frame having a lower end rotatably connected to the other end of the opening and extending upward, and an upper end rotatably connected to the lower end of the first frame; a third frame having one end rotatably connected to the first end of the opening / closing member and the other end rotatably connected to the lower end of the first frame and the upper end of the second frame; 5. A vessel according to claim 3 or 4.

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