A ship

By designing a rotatable threshold ramp, the problem of watertight separation or fire-proof separation threshold hindering the passage of transportation equipment is solved, and the convenience of personnel passage and opening and closing of hatch doors is achieved, and storage and transportation is facilitated.

CN117382831BActive Publication Date: 2024-12-17GUANGZHOU SHIPYARD INTERNATIONAL LTD
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Patent Information

Application Number
CN202311325860.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-12
Publication Date
2024-12-17
Estimated Expiration
2043-10-12

AI Technical Summary

Technical Problem

In ships, the threshold of watertight or fire-proof partitioning hinders the passage of transportation equipment, affecting the daily passage of personnel and the normal opening and closing of the hatch doors.

Method used

A rotatable sill ramp is designed, through the rotating connection between the first slope and the second slope, forming a avoidance groove to cross the threshold, and disassemble the threshold at the folding position to meet the passage of personnel and the opening and closing of the hatch door. and easy storage and transportation.

Benefits of technology

It realizes normal passage of transportation equipment, ensures the passage of personnel and the normal opening and closing of the hatch doors, and at the same time reduces the length of the threshold ramp, facilitates storage and transportation, and meets the needs of different usage scenarios.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses a ship, and relates to the technical field of ship equipment, wherein the ship comprises a threshold ramp, the threshold ramp comprises a first ramp and a second ramp, the second ramp is rotatably connected to the first ramp, the first ramp and the second ramp can rotate relative to each other between an unfolded position and a folded position, when the threshold ramp is in the unfolded position, the lower sides of the first ramp and the second ramp jointly form an avoidance groove for accommodating a threshold, so that the first slope surface and the second slope surface are in a connected position state, so that transportation equipment can be normally transported between two adjacent places, when the threshold ramp is in the folded position, the first slope body and the second slope body are relatively arranged, so that the length of the threshold ramp can be reduced, so as to achieve a state that is easy to carry and store, and ship personnel can install or disassemble the threshold ramp according to actual use requirements, thereby meeting the needs in different use scenarios and achieving the purpose of flexible folding and unfolding.
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Description

Technical Field

[0001] The present invention relates to the technical field of ship equipment, and in particular to a ship. Background Art

[0002] In the shipbuilding field, there may be different watertight separation or fire separation requirements between different spaces such as the ship's engine room, machine repair room and equipment room. When there are relevant requirements between two adjacent spaces, a threshold of a corresponding structure will be set between the spaces. The threshold is used to cooperate with the hatch with corresponding functions to provide watertight separation or fire separation function.

[0003] Due to work needs, some small spare parts or materials need to be transported between places occasionally. Spare parts and materials are generally transported between places by transport equipment (such as carts). However, since the watertight doors installed between places with different watertight partitions or the thresholds of fire doors with different fire partitions block the passage of transport equipment, a ramp board will be temporarily placed on both sides of the threshold to facilitate the passage of transport equipment.

[0004] Generally, the height of the threshold between spaces will not be very large. If the passage of transport equipment is not taken into consideration, there is actually no need to set up a ramp. The presence of a ramp may also have a certain impact on the passage of personnel. In addition, the presence of a ramp will also hinder the normal closing of watertight doors and fire doors, which is not conducive to the daily passage of personnel and the daily opening and closing of hatches. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a ship to solve the problem of adverse effects of the threshold ramp on the daily passage of personnel and the opening and closing of cabin doors.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, a ship is provided, comprising:

[0008] A threshold ramp, the threshold ramp comprising a first ramp body, comprising a first ramp plate and a first supporting structure, the upper side of the first ramp plate is formed with a first slope surface, the first supporting structure is arranged on the lower side of the first ramp plate along the length direction of the first ramp plate, and one end of the first ramp plate along the length direction thereof extends out of the first supporting structure to form a first connecting portion; and

[0009] The second ramp body comprises a second ramp plate and a second supporting structure, wherein the upper side of the second ramp plate is formed with a second ramp surface, the second supporting structure is arranged on the lower side of the second ramp plate along the length direction of the second ramp plate, one end of the second ramp plate along the length direction thereof extends out of the second supporting structure to form a second connecting portion, and the second connecting portion is rotatably connected to the first ramp plate, so that the first ramp body and the second ramp body can rotate relative to each other between an unfolded position and a folded position;

[0010] When the threshold ramp is in the unfolded position, the first support structure, the first connection part, the second connection part and the second support structure are sequentially connected to form a threshold avoidance groove, and the avoidance groove is extended along the rotation axis direction between the first slope body and the second slope body to penetrate the opposite sides of the first slope body and the second slope body; when the threshold ramp is in the folded position, the first slope body and the second slope body are arranged opposite to each other, and at least part of the first slope surface is in contact with at least part of the second slope surface, and the first slope surface and the second slope surface are inclined in a direction away from each other from one end close to the first connection part and the second connection part along the length direction to one end away from the first connection part and the second connection part;

[0011] The first ramp plate and the second ramp plate are both provided with limited side edges on opposite sides along the width direction, and the limited side edges are respectively extended along the length direction of the first ramp plate and the second ramp plate;

[0012] The limiting side edge is rotatably connected to the first ramp plate and the second ramp plate respectively, and the limiting side edge can rotate relative to the first ramp plate or the second ramp plate between a vertical position and a folded position; when the limiting side edge is in the vertical position, the limiting side edge is located on the upper side of the first ramp plate or the second ramp plate;

[0013] A storage box having a storage cavity formed therein, wherein the storage cavity is configured to accommodate the threshold ramp in a folded position, an opening communicating with the storage cavity is formed on the upper side of the storage cavity, and a cover plate rotatably connected to the storage box is provided on one side of the opening;

[0014] The first side of the lower portion of the storage cavity is rotatably connected to the ship via a hinge, and a second buckle structure is provided between the second side of the lower portion of the storage cavity and the ship.

[0015] As an optional implementation, it also includes:

[0016] A protective cover is formed with a protective groove for accommodating a door sill, the notch of the protective groove is opened on the lower side of the protective cover, and the peripheral structure of the protective cover is adapted to the avoidance groove structure so that the protective cover can be placed in the avoidance groove.

[0017] As an optional implementation, a buffer pad is provided at the bottom of the avoidance groove; and / or a buffer pad is provided on the upper side of the protective cover;

[0018] When the protection cover is placed in the avoidance groove, the groove bottom of the avoidance groove abuts against the upper side surface of the protection groove through the buffer pad.

[0019] As an optional embodiment, a first buckle structure is provided between the first slope and the protective cover and / or between the second slope and the protective cover, and the first slope and / or the second slope are buckled with the protective cover through the first buckle structure;

[0020] The first buckle structure includes a buckle body and a slot with matching structures, the buckle body is protruding from the outside of the protective cover, and the slot is opened on the first slope body and / or the second slope body; or, the buckle body is preset on the first slope body and / or the second slope body, and the slot is opened on the outside of the protective cover.

[0021] As an optional implementation, the first supporting structure includes:

[0022] a first longitudinal rib extending along the length direction of the first ramp and disposed on the lower side of the first ramp, the first ramp and the first longitudinal rib being perpendicular to each other, and a length dimension of the first longitudinal rib being smaller than a length dimension of the first ramp;

[0023] A first transverse rib, extending along the width direction of the first ramp and disposed on the lower side of the first ramp, wherein the first transverse rib intersects and cooperates with the first longitudinal rib;

[0024] The second supporting structure comprises:

[0025] A second longitudinal rib is provided on the lower side of the second ramp plate and extends along the length direction of the second ramp plate, the second ramp plate and the second longitudinal rib are perpendicular to each other, and the length dimension of the second longitudinal rib is smaller than the length dimension of the second ramp plate;

[0026] The second transverse ribs are extended along the width direction of the second ramp and are arranged on the lower side surface of the second ramp, and the second transverse ribs are intersected and matched with the second longitudinal ribs.

[0027] As an optional implementation, a first rotating member is installed on the first slope, and a second rotating member that is aligned with the first rotating member is installed on the second slope;

[0028] The first rotating member and the second rotating member are rotatably connected via a rotating portion.

[0029] The beneficial effects of the present invention are as follows: in the ship, the threshold ramp connects the first slope body and the second slope body by rotation so that the first slope body and the second slope body can rotate relative to each other between an unfolded position and a folded position; when the threshold ramp is in the unfolded position, the threshold ramp can pass over the threshold through the avoidance groove, and the first slope surface and the second slope surface are in a connected position state, so that the transport equipment can be normally transported between two adjacent locations.

[0030] When the threshold ramp is in the folded position, the door panel ramp can be removed from the threshold between the spaces to meet the normal passage needs of personnel and the opening and closing needs of the hatch, and the first ramp body and the second ramp body are folded to relative positions, so that the length of the threshold ramp can be reduced to facilitate transportation and storage in the storage box. Ship personnel can install or remove the threshold ramp according to actual use needs, thereby meeting the needs of different use scenarios and achieving the purpose of flexible retraction and deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0032] Figure 1 This is a schematic diagram of the structure of the door threshold ramp in the deployed position according to an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A magnified view of part A;

[0034] Figure 3 A schematic diagram of a process of rotating a threshold ramp from an unfolded position to a folded position according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the folded position of the threshold ramp according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the bottom structure of the threshold ramp according to an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the storage box structure according to an embodiment of the present invention;

[0038] Figure 7 It is a schematic diagram of the matching state of the threshold ramp and the storage box according to an embodiment of the present invention.

[0039] In the figure: 10, first slope body; 11, first slope plate; 111, first slope surface; 112, first connecting part; 12, first supporting structure; 121, first longitudinal rib; 122, first transverse rib; 13, first rotating member; 20, second slope body; 21, second slope plate; 211, second slope surface; 212, second connecting part; 22, second supporting structure; 221, second longitudinal rib; 222, second transverse rib; 23, second rotating member; 30, avoidance groove; 40, protective cover; 41, protective groove; 42, card slot; 50, limiting side edge; 60, rotating part; 70, buckle body; 80, storage box; 81, storage cavity; 82, cover plate; 83, hinge; 84, second buckle structure. DETAILED DESCRIPTION

[0040] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention are further described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] In the shipbuilding field, there may be different watertight separation or fire separation requirements between different spaces such as the ship's engine room, machine repair room and equipment room. When there are relevant requirements between two adjacent spaces, a threshold of a corresponding structure will be set between the spaces. The threshold is used to cooperate with the hatch with corresponding functions to provide watertight separation or fire separation function.

[0044] As can be seen from the background technology, due to the work needs of the ship, some small spare parts or materials need to be transported between places occasionally. The spare parts and materials are generally transported between places by transportation equipment (such as carts). However, since the watertight doors set between places with different watertight partitions or the thresholds of the fire doors of different fire partitions block the passage of the transportation equipment, a ramp board will be temporarily placed on both sides of the threshold to facilitate the passage of the transportation equipment.

[0045] Generally, the height of the threshold between places is not very large. If the passage of transport equipment is not considered, there is actually no need to set up a ramp. The existence of the ramp may also have a certain impact on the passage of personnel, and the existence of the ramp will also hinder the normal closing of watertight doors and fire doors, which is not conducive to the daily passage of personnel and the daily opening and closing of hatches. To this end, this embodiment provides the following solution.

[0046] The present embodiment provides a ship, which includes a threshold ramp. The threshold ramp is mainly used for thresholds set between places with different watertight separation or fire separation requirements in the ship as described above. The threshold ramp aims at the technical problems raised above and improves its structure to solve the problem in the related technology that the threshold ramp has an adverse effect on the daily passage of ship personnel and the opening and closing of hatches.

[0047] Please refer to Figure 1-Figure 4 The threshold ramp includes a first ramp body 10 and a second ramp body 20. Exemplarily, the first ramp body 10 and the second ramp body 20 are used to be respectively arranged in two adjacent places and remain connected to provide a slope for the above-mentioned transportation equipment to pass over the threshold. Specifically, the upper surface of the first ramp body 10 is formed with a first slope surface 111, and the upper surface of the second ramp body 20 is formed with a second slope surface 211. The first slope surface 111 and the second slope surface 211 are both located on the upper side surface of the threshold ramp to achieve the above-mentioned purpose of providing a passage slope for the transportation equipment. The first ramp body 10 and the second ramp body 20 are arranged between two adjacent places, and the first slope surface 111 is connected to the second slope surface 211, so that the transportation equipment can run from one place to another adjacent place through the first slope surface 111 and the second slope surface 211.

[0048] In order to facilitate the understanding of the present solution, in this embodiment, taking the state where the threshold ramp is placed on a relatively horizontal supporting surface (such as a ship deck) as an example, the upper side of the threshold ramp is the side thereof facing away from the supporting surface (such as the attached Figure 1 The lower side of the threshold ramp is the side close to the supporting surface (see the arrow in the figure). Figure 1 The arrow in the middle points to “down”).

[0049] Continuing with the above embodiment, the second slope 20 and the first slope 10 are assembled by means of a rotational connection, so that the first slope 10 and the second slope 20 can rotate relative to each other between the unfolded position and the folded position. During the relative rotation of the first slope 10 and the second slope 20, the first slope surface 111 and the second slope surface 211 also move relative to each other around the rotation axis of the first slope 10 and the second slope 20, and along with the relative movement between the first slope 10 and the second slope 20 between the above two positions, they also move between positions approaching each other and moving away from each other. Exemplarily, in order to make the threshold ramp easy to transport and store, when the threshold ramp is in the extended position, the angle between the first slope surface 111 and the second slope surface 211 is greater than the angle between the first slope surface 111 and the second slope surface 211 in the folded position. For example, in the extended position, the angle between the first slope surface 111 and the second slope surface 211 is an apparent angle greater than 180° and less than 360°; in the folded position, the angle between the first slope surface 111 and the second slope surface 211 is an acute angle less than 90 degrees.

[0050] According to the above embodiments, it can be understood that when the threshold ramp is in the unfolded position, the angle between the first slope 111 and the supporting surface (such as a ship deck), and the angle between the second slope 211 and the supporting surface can be within the range of the angles of the two slopes in the unfolded state, depending on the current scene and personnel needs. For example, in the unfolded state, the first slope 111 and the second slope 211 can be tilted from bottom to top from one end away from each other to one end close to each other to form a shape similar to "^", so as to connect two space decks with the same or similar horizontal heights after crossing the threshold; or, the direction from the first slope 111 to the second slope 211 extends from bottom to top, so that the first slope 111 and the second slope 211 are connected to form a shape similar to " / ", so as to connect space decks at different horizontal heights.

[0051] Specifically, when the threshold ramp is in the unfolded position, the lower sides of the first ramp 10 and the second ramp 20 jointly form an avoidance groove 30 for accommodating the threshold, so that the threshold ramp can cross the threshold and respectively connect the deck panels on two adjacent locations through the first slope 111 and the second slope 211. At this time, the first slope 111 and the second slope 211 are in a connected state, that is, the first slope 111 to the second slope 211 are relatively gentle, so that the transportation equipment can smoothly transition from one location to another through the first slope 111 and the second slope 211. In this example, in order to allow the threshold to be smoothly placed in the avoidance groove 30 and ensure that the joint between the first slope 111 and the second slope 211 can remain relatively flat, the groove opening of the avoidance groove 30 is opened at the lower side of the threshold ramp, and the groove bottom of the avoidance groove 30 is formed at a position close to the upper side of the first slope 10 and the second slope 20. In addition, the avoidance groove 30 is extended along the rotation axis direction between the first slope 10 and the second slope 20 to penetrate the relative position of the first slope 10 and the second slope 20. On both sides, in this way, when the threshold ramp is placed on the threshold, the threshold can be placed in the avoidance groove 30 through the slot of the avoidance groove 30, and the upper side of the threshold is close to the bottom of the avoidance groove 30, the first slope 111 and the second slope 211 can respectively extend from their respective locations to the upper side of the threshold and connect with each other, and the opposite ends of the threshold can respectively pass through the threshold ramp from the two ends of the avoidance groove 30 to avoid interference with the threshold ramp, so that the transportation equipment can be normally transported between two adjacent locations. When the threshold ramp is in the folded position, the first ramp body 10 and the second ramp body 20 are arranged opposite to each other, and at least part of the first slope surface 111 and at least part of the second slope surface 211 are in contact with each other, and the door panel ramp can be removed from the threshold between the spaces, so as to meet the normal passage needs of personnel and the opening and closing needs of the hatch. That is to say, when the first ramp body 10 and the second ramp body 20 are relatively rotated from the deployed position to the folded position, the first slope surface 111 and the second slope surface 211 will move in a direction close to each other, so that after the first ramp body 10 and the second ramp body 20 are folded, the avoidance groove 30 is in a completely open state, so that the length of the threshold ramp can be reduced. When stored, the threshold ramp will not occupy too much space in the height or length and width directions of the space, so as to achieve a state that is easy to carry and store. The ship personnel can install or disassemble the threshold ramp according to actual use needs, thereby meeting the needs in different use scenarios and achieving the purpose of flexible storage.

[0052] In one embodiment, the first slope body 10 and the second slope body 20 may be made of lightweight aluminum alloy to ensure that the threshold ramp has good structural strength while reducing the overall weight of the threshold ramp, making the threshold ramp easier to transport and store.

[0053] Please continue to refer to Figure 1-Figure 4In the threshold ramp solution provided above, it can be seen that a position for forming an avoidance groove 30 needs to be reserved between the first slope body 10 and the second slope body 20. When the threshold ramp is in use, the threshold extends into the lower side of the threshold ramp through the avoidance groove 30, and the first slope surface 111 and the second slope surface 211 are at least partially maintained on the upper side of the avoidance groove 30 (i.e., the threshold). Therefore, the structural strength of the threshold ramp at the avoidance groove 30 will be relatively weak. When heavy transportation equipment is transported through the first slope surface 111 and the second slope surface 211, the first slope body 10 and the second slope body 20 are respectively located on the first slope surface 111 and the second slope surface 211 on the upper side of the avoidance groove 30. There is a probability that the first slope body 10 and the second slope body 20 will sink, thereby causing damage to the threshold ramp, making it impossible for subsequent transportation equipment to pass smoothly, and also causing the threshold to be crushed. To this end, the threshold ramp of this embodiment also includes a protective cover 40, and a protective groove 41 for accommodating the threshold is formed in the protective cover 40. The protective groove 41 is located at the lower side of the threshold ramp and is arranged from bottom to top, so that the bottom of the protective groove 41 is arranged close to the upper side of the protective cover 40, and the notch of the protective groove 41 is opened at the lower side of the protective cover 40, so that the threshold can be placed in the protective groove 41 through the notch. It should be understood that in the embodiment in which the threshold ramp also includes a protective cover 40, the above-mentioned avoidance groove is used to accommodate the protective cover 40, that is, the spacing between the avoidance groove and the threshold needs to reserve a space for the protective cover 40 to be set. The peripheral structure of the protective cover 40 is adapted to the structure of the avoidance groove 30, so that the protective cover 40 can be placed in the avoidance groove 30, or disassembled from the protective groove 41 to separate from the first slope body 10 and the second slope body 20.

[0054] On the basis of the above embodiment, when the protective cover 40 is placed in the avoidance groove 30, the direction in which the protective groove 41 extends is consistent with the avoidance groove 30, that is, the protective groove 41 runs through the opposite ends of the protective cover 40, and the outer wall of the protective cover 40 is at least partially in contact with the groove wall of the avoidance groove 30 to play a supporting and protective role.

[0055] The protective cover 40 is used to isolate the first slope 10, the second slope 20 and the threshold, and improve the structural strength of the first slope 10 and the second slope 20 at the avoidance groove 30 to prevent the first slope 10 and the second slope 20 from being pressed and damaged or even damaging the threshold due to low structural strength at the avoidance groove 30. In addition, while the protective cover 40 provides protection for the threshold and the first slope 10 and the second slope 20, it is necessary to avoid the protective cover 40 from interfering with the relative movement of the first slope 10 and the second slope 20, that is, the protective cover 40 needs to be detachable from the first slope 10 and the second slope 20, or at least detachable from the first slope 10 or the second slope 20. Exemplarily, the protective cover 40 can be in a fixed connection with the first slope 10 or the second slope 20, and is fixedly connected with one of them, and is installed and stored together with the threshold ramp as a whole. For example, the protective cover 40 is fixedly connected to a portion of the first slope 10 used to form the avoidance groove 30. When the first slope 10 and the second slope 20 move from the unfolded position to the folded position, the portion of the second slope 20 used to form the avoidance groove 30 can be separated from the protective cover 40, thereby avoiding that when the first slope 10 and the second slope 20 move relative to each other, the first slope 10 and the second slope 20 cannot achieve relative movement due to the influence of the protective cover 40.

[0056] In this embodiment, the protective cover 40, the first ramp body 10 and the second ramp body 20 are all detachable. During the installation of the threshold ramp, the protective cover 40 is first placed on the threshold where the threshold ramp is to be installed, and then the first ramp body 10 and the second ramp body 20 in the unfolded position are installed thereon, with the avoidance groove 30 being placed outside the protective cover 40. When disassembling the storage threshold ramp, the first ramp body 10 and the second ramp body 20 are removed from the protective cover 40 together and moved to the folded position before the protective cover 40 can be removed from the threshold.

[0057] Please continue to refer to Figure 1-Figure 4 In order to further protect the threshold and improve the support for the first slope 10 and the second slope 20, in this embodiment, a buffer pad is provided between the avoidance groove 30 and the protection cover 40 to buffer the pressure of the first slope 10 and the second slope 20 on the protection cover 40. At the same time, the buffer pad can also improve the supporting force of the protection cover 40 on the first slope 10 and the second slope 20.

[0058] Specifically, the buffer pad is provided in at least three ways:

[0059] 1. A buffer pad is provided at the bottom of the avoidance groove 30;

[0060] Second, a buffer pad is provided on the upper side of the protective cover 40;

[0061] III. Buffer pads are provided on both the bottom of the avoidance groove 30 and the upper side of the protective cover 40.

[0062] According to the above-described embodiment, in the installation state of the first slope 10, the second slope 20, and the protective cover 40, the avoidance groove 30 abuts against the upper side of the protective cover 40 at least through its bottom. Therefore, in this embodiment, by providing a buffer pad between the bottom of the avoidance groove 30 and the upper side of the protective cover 40, the pressure between the first slope 10, the second slope 20, and the protective cover 40 can be effectively buffered, preventing the force from directly passing through the first slope 10 and the second slope 20 to the protective cover 40 when the transportation equipment passes by.

[0063] Therefore, when the protective cover 40 is placed in the avoidance groove 30, the bottom of the avoidance groove 30 abuts against the upper side of the protective groove 41 through the buffer pad. It can be understood that the buffer pad can be made of a flexible material with certain elastic reset performance, such as foam, silica gel, rubber, leather, etc.

[0064] In the above-described embodiment, when the first slope 10 and the second slope 20 are in the unfolded position and placed on a horizontal support surface, the cross-sectional shape of the avoidance groove 30 enclosed between the first slope 10, the second slope 20, and the support surface is rectangular. Therefore, in this embodiment, the cross-sectional structure of the protective cover 40 is set to be approximately "冂"-shaped.

[0065] Please continue to refer to Figure 2 , on the basis that the threshold ramp includes a protective cover 40 and the protective cover 40 is detachable from at least the first slope 10 or the second slope 20. When the first slope 10 is fixedly connected to the protective cover 40 and detachably connected to the second slope 20, a first buckle structure is provided between the second slope 20 and the protective cover 40. When the second slope 20 is fixedly connected to the protective cover 40 and detachably connected to the first slope 10, a first buckle structure is provided between the first slope 10 and the protective cover 40. And when both the first slope 10 and the second slope 20 are set to be detachably connected to the protective cover 40, a first buckle structure is provided between the first slope 10 and the protective cover 40, and between the second slope 20 and the protective cover 40. The first buckle structure can enable the first slope 10 and the second slope 20 to be in a state of being in the unfolded position and cooperating with the protective cover 40, and the first slope 10 and / or the second slope 20 are buckled to the protective cover 40, thereby improving the assembly stability between the two and preventing relative displacement between the first slope 10, the second slope 20, and the protective cover 40 from affecting the support and protection functions provided by the protective cover 40.

[0066] Continuing with the above embodiment, the first buckle structure includes a buckle body 70 and a slot 42 with compatible structures, wherein at least one of the buckle body 70 and the slot 42 needs to be configured as a structure with elastic reset performance, so that the buckle can be inserted into the slot 42 under a certain external force, and can also be separated from the slot 42 under a certain external force. Here, when the buckle body 70 is convexly disposed on the outer side of the protective cover 40, the slot 42 is opened on the first slope body 10 and / or the second slope body 20, and when the buckle body 70 is preset on the first slope body 10 and / or the second slope body 20, the slot 42 is opened on the outer side of the protective cover 40.

[0067] Of course, when the threshold ramp is in the folded position, the protective cover 40 can also maintain an installed and matched state with one of the first slope body 10 and the second slope body 20 through the first buckle structure, so that the protective cover 40 can be stored with the threshold ramp as a whole. For example, when the first buckle structure is provided between the first slope body 10 and the protective cover 40, and between the second slope body 20 and the protective cover 40, when storing, the protective cover 40 can be detached from the second slope body 20 and only connected to the first slope body 10 for storage. When the threshold ramp is installed, the second slope body 20 and the protective cover 40 are buckled and assembled to complete the installation of the threshold ramp.

[0068] According to any of the above embodiments, at least one specific structural form of the first slope body 10 and the second slope body 20 is exemplarily provided below.

[0069] Please refer to Figure 1-Figure 5 The first slope body 10 includes a first slope plate 11 and a first supporting structure 12. The first slope plate 11 is arranged on the upper side of the first supporting structure 12, and its upper side facing away from the first supporting structure 12 forms the above-mentioned first slope surface 111. The first supporting structure 12 is arranged on the lower side of the first slope plate 11 along the length direction of the first slope plate 11. The first supporting structure 12 serves as the supporting body of the first slope body 10. While supporting the first slope plate 11, the first supporting body can also make an adaptive design in structure according to the angle at which the first slope surface 111 is to be set, so as to ensure that under the support of the first supporting structure 12, when the first slope body 10 is placed on the supporting surface, the first slope plate 11 can be tilted along a preset angle. Furthermore, in order to allow the first slope body 10 to be connected to the second slope body 20, and to allow the first slope surface 111 to be connected to the second slope surface 211, one end of the first slope plate 11 along its length direction extends out of the first supporting structure 12 to form a first connecting portion 112. In this embodiment, when the first slope plate 11 is placed on the supporting surface through the first supporting structure 12, the first slope plate 11 is inclined from bottom to top from one end to the other end along its length direction, that is, one end of the first slope plate 11 is a lower end relatively close to the supporting surface, and the other end of the first slope plate 11 is a higher end relatively far away from the supporting surface. Here, the higher end of the first slope plate 11 extends out of the first supporting structure 12 along the length direction.

[0070] Please continue to refer to Figure 1-Figure 5 , similar to the structure of the first slope body 10, the second slope body 20 includes a second slope plate 21 and a second supporting structure 22. The second slope plate 21 is arranged on the upper side of the second supporting structure 22, and the upper side of the second broken plate forms a second slope surface 211. The second supporting structure 22 serves as a supporting body of the second slope body 20 and is arranged on the lower side of the second slope plate 21 along the length direction of the second slope plate 21. One end of the second slope plate 21 along the length direction thereof extends out of the second supporting structure 22 to form a second connecting portion 212, and the second connecting portion 212 is rotatably connected to the first slope plate 11. In this embodiment, when the second slope plate 21 is placed on the supporting surface through the second supporting structure 22, the second slope plate 21 is inclined from bottom to top along its length direction from one end to the other end, that is, one end of the second slope plate 21 is a lower end relatively close to the supporting surface, and the other end of the second slope plate 21 is a higher end relatively far away from the supporting surface. Here, the higher end of the second slope plate 21 extends out of the first supporting structure 12 along the length direction, and the ends of the first slope plate 11 and the second ramp are rotatably connected, so that when the threshold ramp is unfolded, the first slope surface 111 and the second slope surface 211 are roughly in a relatively flat "^" shape.

[0071] According to the above embodiment, when the threshold ramp is in the deployed position, the first support structure 12 (the side close to the second support structure 22 along the length direction), the first connection portion 112 (the lower side), the second connection portion 212 (the lower side) and the second support structure 22 (the side close to the first support structure 12 along the length direction) are sequentially connected to form the avoidance groove 30.

[0072] That is to say, the first connection portion 112 is a part of the first ramp 11, and the second connection portion 212 is a part of the second ramp 21. When the first ramp 10, the second ramp 20 and the protective cover 40 are matched, the first connection portion 112 and the second connection portion 212 are both located on the upper side of the protective cover 40, and the above-mentioned buffer pad is arranged between the first connection portion 112, the second connection portion 212 and the upper side of the protective cover 40.

[0073] According to the above description of the specific structure of the first slope body 10 and the second slope body 20, the first supporting structure 12 includes a first longitudinal rib 121 and a first transverse rib 122. The first longitudinal rib 121 extends along the length direction of the first slope plate 11 and is arranged on the lower side of the first slope plate 11. The first slope plate 11 and the first longitudinal rib 121 are perpendicular to each other, and the length dimension of the first longitudinal rib 121 is smaller than the length dimension of the first slope plate 11, so that at least one end of the first slope plate 11 can extend from the first supporting structure 12 in the length direction. The first transverse rib 122 extends along the width direction of the first slope plate 11 and is arranged on the lower side of the first slope plate 11. The first transverse rib 122 intersects and cooperates with the first longitudinal rib 121. In this example, the first longitudinal ribs 121 and the first transverse ribs 122 can be provided in multiple rows, and are arranged at intervals along the width and length directions, respectively. While improving the supporting strength of the first slope plate 11, multiple hollow structures are formed between the first longitudinal ribs 121 and the first transverse ribs 122, thereby achieving the purpose of saving the amount of production materials of the first slope body 10, reducing the weight of the first slope body 10, reducing product costs, and making it easier to transport and store.

[0074] Please continue to refer to Figure 1 , Figure 5 , similar to the first supporting structure 12, the second supporting structure 22 includes a second longitudinal rib 221 and a second transverse rib 222, wherein the second longitudinal rib 221 extends along the length direction of the second ramp 21 and is arranged on the lower side of the second ramp 21, the second ramp 21 and the second longitudinal rib 221 are perpendicular to each other, and the length dimension of the second longitudinal rib 221 is smaller than the length dimension of the second ramp 21, and the second transverse rib 222 extends along the width direction of the second ramp 21 and is arranged on the lower side of the second ramp 21, and the second transverse rib 222 intersects and cooperates with the second longitudinal rib 221 to achieve the same cost reduction and easy transportation and storage purposes.

[0075] Continuing with the above-mentioned embodiments of the first supporting structure 12 and the second supporting structure 22, in combination with the above-mentioned embodiment in which a first buckle structure is provided between the first slope body 10 and / or the second slope body 20 and the protective cover 40, the buckle body 70 or the card slot 42 can be provided on the side wall of the first transverse rib 122 closest to the second supporting structure 22 and / or the second transverse rib 222 closest to the first supporting structure 12.

[0076] According to the above description of the structure of the first slope body 10 and the second slope body 20, in order to prevent the transportation equipment from being separated from the first slope body 10 and the second slope body 20 when transporting via the first slope surface 111 and the second slope surface 211, please refer to Figure 1-Figure 2The first ramp 11 and the second ramp 21 are provided with limiting side edges 50 on opposite sides in the width direction. The limiting side edges 50 are used to restrict the moving direction of the transportation equipment when the transportation equipment is transported along the first slope 111 and the second slope 211, so as to prevent the transportation equipment from detaching from the first ramp 11 and the second ramp 21 from both sides of the first slope 111 or the second slope 211, thereby causing accidents such as equipment tipping.

[0077] Specifically, in order to ensure that the transportation equipment can provide the corresponding limiting function at all times on the threshold ramp, the limiting side edges 50 are respectively extended along the length direction of the first ramp 11 and the second ramp 21. In one embodiment, in order to allow the first slope 111 and the second slope 211 to be connected more smoothly, the first connecting portion 112 is set at an angle to the body of the first ramp 11, for example, Figure 1 As shown in the example, the main body of the first ramp 11 is inclined to the support surface, and the first connecting portion 112 is parallel to the support surface. Correspondingly, the main body of the second ramp 21 is inclined to the support surface, and the second connecting portion 212 is parallel to the support surface.

[0078] In order to avoid the problem of mutual interference caused by the existence of the limiting side edge 50 when the first slope body 10 and the second slope body 20 are in the folded position, the limiting side edge 50 is rotatably connected to the first ramp plate 11 and the second ramp plate 21 respectively, and the limiting side edge 50 can rotate relative to the first ramp plate 11 or the second ramp plate 21 between the vertical position and the folded position. When the limiting side edge 50 is in the vertical position, the limiting side edge 50 is located on the upper side of the first ramp plate 11 or the second ramp plate 21. That is to say, the limiting side edge 50 arranged on the first slope body 10 extends from the side close to the first ramp plate 11 to the side away from the first ramp plate 11 from bottom to top. Specifically, The limiting side edge 50 can be set to be perpendicular to the first ramp 11. Correspondingly, the limiting side edge 50 set on the second slope body 20 extends from the side close to the second ramp 21 to the side away from the second ramp 21 from bottom to top, and can also be set to be close to the second ramp 21 to achieve the limitation of the transportation equipment. When the threshold ramp needs to be disassembled, the limiting side edge 50 can be folded in the direction close to the first ramp 11 and the second ramp 21, so that the side wall of the limiting side edge 50 is rotated to abut against the first slope surface 111 or the second slope surface 211, and the first slope body 10 and the second slope body 20 can be rotated from the expanded position to the folded position. Alternatively, during the above process, the limiting side edge 50 can also rotate in a direction away from the first slope surface 111 or the second slope surface 211 until its side surface abuts against one side of the first support structure 12 or the second support structure 22 along the width direction, so as to avoid interference caused by the limiting side edges 50 respectively set when the first slope body 10 and the second slope body 20 move toward the folded position.

[0079] According to the structure of the first connection portion 112 and the second connection portion 212 mentioned above, in order to facilitate the rotation of the limiting side edge 50 on the first slope plate 11 and the second slope plate 21, the limiting side edge 50 is only connected to the main body of the first slope plate 11 and the second slope plate 21, and has no connection relationship with the first connection portion 112 and the second connection portion 212. For example, the limiting side edge 50 arranged on the first slope body 10 extends along the length direction of the first slope plate 11 to the end of the first connection portion 112 away from the second connection portion 212, while the limiting side edge 50 arranged on the second slope body 20 extends along the length direction of the second slope plate 21 to the end of the second connection portion 212 away from the first connection portion 112. In this way, the rotation axis between the limiting side edge 50 and the first slope body 10 or the second slope body 20 can be arranged along a straight line, thereby avoiding the bending of the first connection portion 112 or the second connection portion 212 and affecting the rotation design of the limiting side edge 50.

[0080] In any of the above embodiments, the first slope body 10 and the second slope body 20 can be rotatably connected via a rotating mechanism such as a rotating shaft, a flexible body, or an elastic body.

[0081] According to any of the above embodiments, Figure 2 As shown, in order to facilitate the assembly and disassembly of the rotating mechanism on the first slope 10 and the second slope 20, a first rotating member 13 is installed on the first slope 10, and a second rotating member 23 that matches the first rotating member 13 is installed on the second slope 20. The first rotating member 13 and the second rotating member 23 are rotatably connected through a rotating portion 60. Here, the structural form of the rotating portion 60 and the first rotating member 13 and the second rotating member 23 depends on the type of the rotating mechanism. For example, when the first slope 10 and the second slope 20 are rotatably connected through a rotating shaft, the rotating mechanism can be a hinge, the first rotating member 13 is a first hinge plate, the second rotating member 23 is a second hinge plate, and the rotating portion 60 is a rotating shaft connecting the first hinge plate and the second hinge plate; and when the rotating mechanism is rotatably connected through a flexible and elastic material, the elastic body can be an integral structure or a split structure, and in this case, the rotating portion 60 is a flexible body or an elastic body.

[0082] In this example, in combination with the implementation method in which the first slope body 10 includes the first slope plate 11 and the second slope body 20 includes the second slope plate 21, the first rotating member 13 is arranged on the first slope surface 111, and the second rotating member 23 is arranged on the second slope surface 211. In this way, in addition to providing sufficient rotation space on the upper side of the first slope surface 111 and the second slope surface 211, personnel can also directly disassemble and assemble the first rotating member 13 and the second rotating member 23 on the upper side of the threshold ramp, thereby improving the disassembly and assembly efficiency of the threshold ramp and reducing the difficulty of disassembly and assembly of the threshold ramp.

[0083] Of course, in other embodiments, the rotating part 60 can also be directly installed between the first slope body 10 and the second slope body 20, for example, the rotating shaft is directly welded between the first slope plate 11 and the second slope plate 21, or the flexible body is directly attached to the first slope surface 111 and the second slope surface 211.

[0084] This embodiment also provides a ship. As known from the background technology, a plurality of places with different waterproof isolation or fire isolation requirements are arranged in the ship, and thresholds and hatches with corresponding functions and cooperating with each other are arranged between adjacent places.

[0085] This embodiment provides the threshold ramp that is easy to store as described above, so that personnel can relatively easily install the threshold ramp on the threshold and between adjacent places according to different usage conditions, or remove the threshold ramp from adjacent places and the threshold, and the threshold ramp is easy to transport and store. That is, when there is no need to use transportation equipment to transport spare parts or materials between places, there is no need to set the threshold ramp on the threshold between places, so that personnel can enter and exit daily, and the hatch can also be closed normally; and when spare parts or materials need to be transported between places by transportation equipment, personnel can install the threshold ramp on the threshold, so that the transportation equipment can pass smoothly.

[0086] In the above embodiment, in order to facilitate the storage of the threshold channel when not in use, the ship further includes a storage box 80. The storage box 80 is placed in at least one of two adjacent places where the threshold is provided, depending on the specific conditions of the ship's premises. The threshold ramp can be stored in the storage box 80. The storage box 80 can be placed at a position close to the cabin door of the premises, so that personnel can directly take out the threshold ramp from the storage box 80 for use when the threshold ramp is needed.

[0087] Please refer to Figure 6-Figure 7 A storage cavity 81 is formed inside the storage box 80, and the storage cavity 81 is configured to accommodate the threshold ramp in the folded position. A cavity opening connected to the storage cavity 81 is opened on the upper side of the storage cavity 81, and a cover plate 82 rotatably connected to the storage box 80 is provided on one side of the cavity opening. The cover plate 82 can open the storage cavity 81 or close the storage cavity 81 so that a person can take out the threshold ramp from the storage cavity 81 through the cavity opening, or close the storage box 80 to protect the threshold ramp.

[0088] In this example, the cover 82 can be rotatably installed on one side of the storage box 80 at the cavity opening through a hinge, and a lock is installed between the side of the cover 82 away from the hinge and the storage box 80, so that the cover 82 can be kept stable by the lock when it is covered on the storage box 80.

[0089] Furthermore, in order to allow the threshold ramp to be relatively easily removed from the storage cavity 81, the first side of the lower portion of the storage cavity 81 is rotatably connected to the ship via a hinge 83, and a second snap-fit ​​structure 84 is provided between the second side of the lower portion of the storage cavity 81 and the ship. When the threshold ramp is normally stored in the storage box 80, the storage cavity 81 is in a vertically placed state, that is, the cavity opening of the storage box 80 is arranged upward, so as to save the floor space of the premises. At this time, the premises deck and the storage box 80 are stably matched through the second buckle structure 84. When the threshold ramp needs to be taken out of the storage cavity 81, the personnel can apply a certain external force to the storage box 80 to make the storage box 80 rotate relative to the premises deck around its hinge 83, while the second buckle structure 84 is released from the fixation between it and the premises deck, and finally the storage box 80 is rotated to a flat state, that is, the cavity opening of the storage box 80 is facing a direction parallel to the premises deck, so that the personnel can easily pull the threshold ramp out of the storage cavity 81.

[0090] In the embodiment including the first ramp plate 11 and the second ramp plate 21 , handles (not shown) may be further provided on the first ramp plate 11 and the second ramp plate so as to facilitate the use of the handles to pull the threshold ramp out of the storage cavity 81 .

[0091] In the above embodiment, when the first slope body 10 and the second slope body 20 are in the folded position and stored in the storage cavity 81, the first connection portion 112 and the second connection portion 212 are arranged close to the cavity opening, and the first slope surface 111 and the second slope surface 211 are inclined in a direction away from each other from one end close to the first connection portion 112 and the second connection portion 212 along the length direction to one end away from the first connection portion 112 and the second connection portion 212, so as to provide sufficient placement position for the protective cover 40.

[0092] Of course, in other embodiments, the storage box 80 can also be placed directly in the place through shock-absorbing components such as wooden blocks.

[0093] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", etc., and other directions or positional relationships are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0094] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0095] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0096] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A ship, include: A threshold ramp, the threshold ramp comprising a first ramp body (10), comprising a first ramp plate (11) and a first supporting structure (12), wherein the upper side of the first ramp plate (11) is formed with a first slope surface (111), the first supporting structure (12) is arranged on the lower side of the first ramp plate (11) along the length direction of the first ramp plate (11), and one end of the first ramp plate (11) along the length direction thereof extends out of the first supporting structure (12) to form a first connecting portion (112); as well as The second ramp body (20) comprises a second ramp plate (21) and a second supporting structure (22), wherein the upper side surface of the second ramp plate (21) is formed with a second ramp surface (211), the second supporting structure (22) is arranged on the lower side surface of the second ramp plate (21) along the length direction of the second ramp plate (21), one end of the second ramp plate (21) along the length direction thereof extends out of the second supporting structure (22) to form a second connecting portion (212), the second connecting portion (212) being rotatably connected to the first ramp plate (11), so that the first ramp body (10) and the second ramp body (20) can rotate relative to each other between an unfolded position and a folded position; When the threshold ramp is in an unfolded position, the first support structure (12), the first connection portion (112), the second connection portion (212) and the second support structure (22) are sequentially connected to form a threshold avoidance groove (30), and the avoidance groove (30) is extended along the direction of the rotation axis between the first slope body (10) and the second slope body (20) to penetrate the opposite sides of the first slope body (10) and the second slope body (20); when the threshold ramp is in a folded position, the first slope body (10) and the second slope body (20) are arranged opposite to each other, and at least a part of the first slope surface (111) and at least a part of the second slope surface (211) are in contact with each other, and the first slope surface (111) and the second slope surface (211) are inclined in a direction away from each other from one end close to the first connection portion (112) and the second connection portion (212) along the length direction to one end away from the first connection portion (112) and the second connection portion (212); The first ramp plate (11) and the second ramp plate (21) are both provided with limiting side edges (50) on opposite sides along the width direction, and the limiting side edges (50) are respectively extended along the length direction of the first ramp plate (11) and the second ramp plate (21); The limiting side edge (50) is rotatably connected to the first ramp (11) and the second ramp (21) respectively, and the limiting side edge (50) can be rotated relative to the first ramp (11) or the second ramp (21) between a vertical position and a folded position; when the limiting side edge (50) is in the vertical position, the limiting side edge (50) is located on the upper side of the first ramp (11) or the second ramp (21); A storage box (80) is formed with a storage cavity (81) therein, wherein the storage cavity (81) is configured to accommodate the threshold ramp in a folded position, an opening communicating with the storage cavity (81) is formed on the upper side of the storage cavity (81), and a cover plate (82) rotatably connected to the storage box (80) is provided on one side of the opening; The first side of the lower portion of the storage cavity (81) is rotatably connected to the ship via a hinge (83), and a second buckle structure (84) is provided between the second side of the lower portion of the storage cavity (81) and the ship.

2. A vessel according to claim 1, It is characterized in that The threshold ramp further comprises: A protective cover (40) is formed with a protective groove (41) for accommodating a door sill, the notch of the protective groove (41) is opened on the lower side of the protective cover (40), and the peripheral structure of the protective cover (40) is adapted to the structure of the avoidance groove (30) so that the protective cover (40) can be placed in the avoidance groove (30).

3. A vessel according to claim 2, It is characterized in that A buffer pad is provided at the bottom of the avoidance groove (30); and / or a buffer pad is provided on the upper side of the protection cover (40); When the protection cover (40) is placed in the avoidance groove (30), the groove bottom of the avoidance groove (30) abuts against the upper side surface of the protection groove (41) through the buffer pad.

4. A vessel according to claim 2, It is characterized in that A first buckle structure is provided between the first slope (10) and the protective cover (40) and / or between the second slope (20) and the protective cover (40), and the first slope (10) and / or the second slope (20) are buckled with the protective cover (40) through the first buckle structure; The first buckle structure comprises a buckle body (70) and a clamping slot (42) with matching structures, wherein the buckle body (70) is protrudingly arranged on the outer side of the protective cover (40), and the clamping slot (42) is opened on the first slope body (10) and / or the second slope body (20); or, the buckle body (70) is preset on the first slope body (10) and / or the second slope body (20), and the clamping slot (42) is opened on the outer side of the protective cover (40).

5. The vessel according to claim 1, It is characterized in that The first supporting structure (12) comprises: a first longitudinal rib (121) extending along the length direction of the first ramp (11) and arranged on the lower side of the first ramp (11); the first ramp (11) and the first longitudinal rib (121) are perpendicular to each other, and the length dimension of the first longitudinal rib (121) is smaller than the length dimension of the first ramp (11); A first transverse rib (122) extending along the width direction of the first ramp (11) and arranged on the lower side of the first ramp (11), wherein the first transverse rib (122) intersects and cooperates with the first longitudinal rib (121); The second supporting structure (22) comprises: A second longitudinal rib (221) is extended along the length direction of the second ramp plate (21) and is arranged on the lower side of the second ramp plate (21); the second ramp plate (21) and the second longitudinal rib (221) are perpendicular to each other, and the length dimension of the second longitudinal rib (221) is smaller than the length dimension of the second ramp plate (21); The second transverse rib (222) is extended along the width direction of the second slope plate (21) and is arranged on the lower side surface of the second slope plate (21), and the second transverse rib (222) intersects and cooperates with the second longitudinal rib (221).

6. A vessel according to any one of claims 1 to 5, It is characterized in that A first rotating member (13) is installed on the first slope body (10), and a second rotating member (23) aligned with the first rotating member (13) is installed on the second slope body (20); The first rotating member (13) and the second rotating member (23) are rotationally connected via a rotating portion (60).