A roll-on / roll-off ship

Abstract

The present invention relates to a roll-on / roll-off ship, comprising a hull and multiple movable decks. The hull has multiple cargo holds, each of which has a plurality of mounting portions provided on its sidewalls in the vertical direction. The multiple movable decks correspond one to one with the multiple cargo holds, each movable deck being disposed transversely within a corresponding cargo hold and provided with a fixing portion that cooperates with the mounting portion. The fixing portion and the mounting portion are detachably connected, allowing the height of the movable deck to be adjusted. The movable deck has a first position in which it is fixed to the top of the cargo hold and a second position in which it is fixed to the middle of the cargo hold. When the movable deck is in the second position, the cargo hold is separated vertically into two loading chambers for loading cargo. This solution can improve the space utilization of the small machinery and equipment within the cargo hold when loading a mixture of large and small machinery and equipment, while also improving practicality and thereby increasing the transport capacity of the roll-on / roll-off ship.

Description

Technical Field

[0001] The present invention relates to the technical field of transport ships, and in particular to a roll-on / roll-off ship. Background Art

[0002] A ro-ro ship is a type of transport vessel that uses containers or cargo vehicles as its transport unit. It can carry cargo such as cars, large machinery and equipment, and containers. Compared to ordinary ships, its loading and unloading efficiency is higher, but it also places higher requirements on the ship's type and structure. Ro-ro ships have multiple decks inside to carry different types of cargo. Traditional ro-ro ships for cars require vehicles to be driven up and down, with each deck simply placing vehicles of corresponding height. However, as people's demand for cargo transportation capacity and efficiency continues to increase, multi-purpose ro-ro ships that can transport multiple types of cargo simultaneously have great advantages. Container transportation has always occupied a large market share in inland waterway shipping, and in the field of engineering transportation, the demand for the transportation of large machinery and equipment is also growing.

[0003] For example, patent CN105882899A discloses a large inland river ro-ro passenger and car ferry with a large, slow-flowing U-shaped bow at the underwater hull profile to reduce oncoming flow resistance and improve propulsion efficiency. However, existing ro-ro ships, when carrying both large and small machinery and equipment, have limited space utilization when loading only small machinery and equipment in the hold, as the cargo hold has reserved space for the large machinery. Summary of the Invention

[0004] In view of this, it is necessary to provide a roll-on / roll-off ship to solve the technical problem in the prior art that the roll-on / roll-off space utilization rate of small mechanical equipment is low when the roll-on / roll-off ship carries a mixed load of large mechanical equipment and containers at the same time.

[0005] The present invention provides a roll-on / roll-off ship, comprising:

[0006] The hull has a plurality of cargo holds, and the side wall of each cargo hold is provided with a plurality of mounting portions in the vertical direction; and

[0007] Multiple movable decks correspond one to one with the multiple cargo holds, each of the movable decks is horizontally arranged in the corresponding cargo hold and is provided with a fixing portion that cooperates with the mounting portion, the fixing portion is detachably connected to the mounting portion, so that the height of the movable deck is adjustable, and the movable deck has a first position fixed to the top of the cargo hold and a second position fixed to the middle of the cargo hold. When the movable deck is in the second position, the cargo hold is separated into two loading cavities for loading cargo along the upper and lower directions.

[0008] Optionally, the mounting portion is a mounting screw hole provided on two opposite side walls of the cargo hold;

[0009] The movable deck includes a deck body and fixing seats connected to opposite ends of the deck body, the fixing seats are provided with fixing screw holes corresponding to the mounting screw holes, and the fixing screw holes constitute the fixing parts;

[0010] The roll-on / roll-off ship further includes fixing bolts arranged corresponding to the fixing seats, and the fixing bolts can be passed through the corresponding fixing screw holes and the installation screw holes, so that the fixing seats can be detachably fixed to the cargo hold.

[0011] Optionally, the fixing seat includes a fixing plate and a connecting plate, the fixing plate and the connecting plate are rotatably connected around an axis in a horizontal direction, the connecting plate is connected to the deck body, and the fixing screw hole is formed in the fixing plate;

[0012] Each of the movable decks has a fixing seat fixed to the cargo hold side wall, and another fixing seat is detached from the cargo hold side wall, so that the corresponding end of the deck body can abut against the cargo hold bottom wall in a climbing state.

[0013] Optionally, the ro-ro ship further comprises a support seat and a support bolt, wherein the support seat is located at the lower end of the fixing plate and is provided with a support screw hole matching the mounting screw hole, and the support bolt is passed through the mounting screw hole and the support screw hole, so that the position of the support seat can be adjusted;

[0014] Wherein, a support adjustment spring is provided on the upper side of the support seat corresponding to the deck body, so as to adjust the inclination angle of the movable deck when it is in the climbing state.

[0015] Optionally, the ro-ro ship further comprises a base detachably fixed to each cargo hold bottom wall, wherein the position of the base on the cargo hold bottom wall is adjustable and corresponds to an end of the deck body detached from the cargo hold side wall;

[0016] Wherein, an auxiliary adjustment spring is provided on the upper side of the base corresponding to the deck body.

[0017] Optionally, the base is provided with an extended ramp corresponding to the deck body, and the extended ramp extends from one end of the deck body to the bottom wall of the cargo hold.

[0018] Optionally, a plurality of screw holes are provided on the bottom wall of the cargo hold, and the plurality of screw holes are spaced apart along the length direction of the deck body;

[0019] The base is provided with a locking hole corresponding to the screw hole, and the roll-on / roll-off ship further includes a locking bolt passing through the locking hole and the screw hole, so that the position of the base on the bottom wall of the cargo hold is adjustable.

[0020] Optionally, the fixing seat further includes a telescopic plate fixed to the fixing plate, the length of the telescopic plate is adjustable, and the lower end of the telescopic plate is used to abut against the upper side of the support seat.

[0021] Optionally, the connecting plate is screwed to the deck body so that the connecting plate can be detached from the deck body.

[0022] Optionally, the movable deck in the first position and the movable deck in the second position are alternately arranged in sequence.

[0023] Compared to the prior art, the ro-ro ship provided by the present invention features a movable deck installed horizontally within each cargo hold. For cargo holds intended for loading large machinery and equipment, the movable deck is fixed in a first position, located at the top of the corresponding hold. This position allows the overall cargo hold space to accommodate the large machinery and equipment, allowing the large machinery and equipment to be directly transferred to the hold. For cargo holds intended for loading small machinery and equipment, the movable deck is fixed in a second position, located in the middle of the hold. This position divides the hold into two loading chambers for accommodating small machinery and equipment. This allows two small machinery and equipment to be stacked in one hold. Furthermore, because the height of the movable deck can be adjusted, the volumes of the two loading chambers can be adjusted accordingly, enabling a single hold to accommodate two types of small machinery and equipment of varying sizes, providing greater loading flexibility. This improves the space utilization of the small machinery and equipment within the hold when loading a mixture of large and small machinery and equipment, while also enhancing practicality and ultimately increasing the transport capacity of the ro-ro ship.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the description, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. The specific implementation methods of the present invention are given in detail by the following embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 A schematic structural diagram of a first embodiment of the ro-ro mixed loading mechanical equipment provided by the present invention;

[0027] Figure 2 This is a structural schematic diagram of the second embodiment of the ro-ro ship mixed loading mechanical equipment provided by the present invention.

[0028] Figure 3 This is a schematic diagram of the partial structure of a ro-ro ship with mixed loading when there are a large number of large machinery and equipment;

[0029] Figure 4 This is a schematic diagram of the partial structure of a ro-ro ship with mixed loading when there are a large number of small mechanical equipment;

[0030] Figure 5 for Figure 1 Schematic diagram of the structure of the middle cargo hold;

[0031] Figure 6 for Figure 5 A magnified schematic diagram of point A in the middle;

[0032] Figure 7 for Figure 6 Schematic diagram of the structure of the middle fixed plate;

[0033] Figure 8 for Figure 6 Schematic diagram of the structure of the middle connecting plate;

[0034] Figure 9 for Figure 6 A partial top view of the middle movable deck;

[0035] Figure 10 for Figure 5 Schematic diagram of the structure of the middle base;

[0036] Figure 11 A diagram showing the number and position distribution of the movable decks in the second position in one embodiment of the ro-ro ship provided by the present invention.

[0037] Description of reference numerals:

[0038] 100-RoRo ship, 1-Hull, 11-Cargo hold, 12-Loading cavity, 13-Column, 2-Movable deck, 21-Fixed part, 21a-Fixed screw hole, 22-Deck body, 23-Fixed seat, 231-Fixed plate, 232-Connecting plate, 233-Telescopic plate, 3-Support seat, 31-Support adjustment spring, 4-Base, 41-Attached adjustment spring, 42-Extension ramp, 43-Locking bolt, 5-Fixed deck, 200-Large mechanical equipment, 300-Small mechanical equipment. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0040] See Figures 1 to 6The ro-ro ship 100 includes a hull 1 and multiple movable decks 2; the hull 1 has multiple cargo holds 11, and the side walls of each cargo hold 11 are provided with multiple mounting parts (not shown) along the upper and lower directions; the multiple movable decks 2 correspond to the multiple cargo holds 11 one by one, and each movable deck 2 is horizontally arranged in the corresponding cargo hold 11 and is provided with a fixing part 21 that cooperates with the mounting part. The fixing part 21 is detachably connected to the mounting part so that the height of the movable deck 2 is adjustable, and has a first position fixed to the top of the cargo hold 11 and a second position fixed to the middle of the cargo hold 11. When the movable deck 2 is in the second position, the cargo hold 11 is separated into two loading cavities 12 for loading cargo along the upper and lower directions.

[0041] In the ro-ro ship 100 provided by the present invention, a movable deck 2 is installed transversely within each cargo hold 11. For cargo holds 11 that need to carry large machinery and equipment 200, the movable deck 2 is fixed in a first position, i.e., located at the top of the corresponding cargo hold 11. In this position, the overall space of the cargo hold 11 matches the volume of the large machinery and equipment 200, allowing the large machinery and equipment 200 to be directly transferred to the cargo hold 11. For cargo holds 11 that need to carry small machinery and equipment 300, the movable deck 2 is fixed in a second position, i.e., located in the middle of the cargo hold 11. The movable deck 2 then divides the cargo hold 11 into two loading chambers 12 that can accommodate the small machinery and equipment 300. This allows two small machinery and equipment 300 to be stacked in one cargo hold 11. Furthermore, because the height of the movable deck 2 can be adjusted, the volume of the two loading chambers 12 can be changed accordingly, allowing one cargo hold 11 to carry two small machinery and equipment 300 of different sizes, providing greater loading flexibility. Therefore, when the large mechanical equipment 200 and the small mechanical equipment 300 are mixed, the space utilization of the small mechanical equipment 300 in the cargo hold 11 can be improved, while the practicality is improved, thereby improving the transportation capacity of the ro-ro ship 100.

[0042] It should be noted that the cargo hold 11 can be arranged in a variety of ways. In this embodiment, the hull 1 is provided with multiple fixed decks 5 spaced apart vertically. A chamber is formed between two adjacent fixed decks 5. Multiple columns 13 are provided within the chamber. Every four columns 13 form a cargo hold 11, allowing multiple cargo holds 11 on the same level to be interconnected. Furthermore, the large mechanical equipment 200 can be a large automobile or other large equipment, and the small mechanical equipment 300 can be a small automobile, a container, or other small equipment, without limitation.

[0043] Further, see Figures 6 to 9The mounting portion is a mounting screw hole provided on opposite side walls of the cargo hold 11. The movable deck 2 includes a deck body 22 and a fixing seat 23 connected to opposite ends of the deck body 22. The fixing seat 23 has fixing screw holes 21a corresponding to the mounting screw holes, and the fixing screw holes 21a constitute the fixing portion 21. The ro-ro ship 100 also includes fixing bolts provided corresponding to the fixing seats 23. The fixing bolts can be inserted through the corresponding fixing screw holes 21a and the mounting screw holes to allow the fixing seat 23 to be removably fixed to the cargo hold 11. In this embodiment, a plurality of mounting screw holes are provided on the side walls of the cargo hold 11, that is, on the inner sides of the columns 13. The plurality of mounting screw holes are spaced apart along the height direction of the columns 13. Correspondingly, fixing screw holes 21a are provided on the fixing seat 23. Through the cooperation of the fixing bolts, the fixing screw holes 21a, and the mounting screw holes, the deck body 22 can be fixed to the mounting screw holes at corresponding heights, thereby achieving flexible adjustment of the volume of the two loading chambers 12. The structure is simple and reliable.

[0044] It should be noted that the small mechanical equipment 300 can be transferred to the upper side of the movable deck 2 by a lifting device, or other forms are also possible. Specifically, in this embodiment, the fixing seat 23 includes a fixing plate 231 and a connecting plate 232. The fixing plate 231 and the connecting plate 232 are rotatably connected around an axis in the horizontal direction. The connecting plate 232 is connected to the deck body 22, and the fixing screw hole 21a is formed in the fixing plate 231. Each movable deck 2 has a fixing seat 23 fixed to the side wall of the cargo hold 11, and the other fixing seat 23 is detached from the side wall of the cargo hold 11, so that the corresponding end of the deck body 22 can abut against the bottom wall of the cargo hold 11 in a climbing state. In this embodiment, when the cargo hold 11 needs to load the small mechanical equipment 300, the movable deck 2 of the cargo hold 11 is first adjusted to the climbing state. Specifically, the fixing plate 231 at one end of the movable deck 2 is fixed to the column 13 with fixing bolts, while the fixing plate 231 at the other end is detached from the column 13. The corresponding end of the deck body 22 is then placed against the bottom wall of the cargo hold 11, tilting the deck body 22. This facilitates the transfer of the small mechanical equipment 300 to the upper side of the movable deck 2. The movable deck 2 is then lifted to the second position using an electric winch or a jacking vehicle, and the corresponding fixing plate 231 is then secured to the column 13 using fixing bolts. Finally, the other small mechanical equipment 300 is transferred to the loading chamber 12 on the lower side of the movable deck 2.

[0045] Furthermore, the ro-ro ship 100 also includes a support base 3 and support bolts. The support base 3 is located at the lower end of the fixing plate 231 and is provided with support screw holes that mate with the mounting screw holes. The support bolts are inserted through the mounting screw holes and the support screw holes, allowing the position of the support base 3 to be adjusted. Furthermore, a support adjustment spring 31 is provided on the upper side of the support base 3, corresponding to the deck body 22, to adjust the tilt angle of the movable deck 2 when in the climbing state. In other words, in this embodiment, the support adjustment spring 31 provides elastic support for the deck body 22, allowing the tilt angle of the deck body 22 to be adjusted within a certain range, thereby adjusting the slope of the deck body 22 and facilitating the transport of small mechanical equipment 300. The support base 3 and the fixing plate 231 share mounting screw holes to ensure the rigidity of the column 13. Furthermore, the support base 3 provides support for the fixing plate 231, thereby enhancing the stability of the deck body 22.

[0046] Specifically, see Figure 10 The ro-ro ship 100 also includes a base 4 detachably secured to the bottom wall of each cargo hold 11. The base 4 is adjustable in position on the bottom wall of the cargo hold 11 and detachable from the side wall of the cargo hold 11, corresponding to the deck body 22. An auxiliary adjustment spring 41 is provided on the upper side of the base 4, corresponding to the deck body 22. In this embodiment, the auxiliary adjustment spring 41 cooperates with the support adjustment spring to provide more stable adjustment of the inclination angle of the deck body 22. Furthermore, the base 4 is provided with an extension ramp 42, corresponding to the deck body 22. The extension ramp 42 extends from the end away from the deck body 22 to the bottom wall of the cargo hold 11. This allows a transfer vehicle to transfer the small mechanical equipment 300 to the deck body 22 via the extension ramp 42, eliminating any height difference between the base 4 and the bottom wall of the cargo hold 11 and any disconnection between the base 4 and the deck body 22, further enhancing the ease of transfer of the small mechanical equipment 300.

[0047] Furthermore, the bottom wall of the cargo hold 11 is provided with a plurality of threaded holes spaced apart along the length of the deck body 22. The base 4 is provided with locking holes corresponding to the threaded holes. The ro-ro ship 100 also includes locking bolts 43 passing through the locking and threaded holes, allowing the base 4 to be adjusted relative to the bottom wall of the cargo hold 11. In this embodiment, the plurality of threaded holes are spaced apart along the length of the deck body 22, allowing the base 4 to flexibly adjust to the deck body 22 after its tilt angle has been adjusted, ensuring stable engagement between the auxiliary adjustment spring 41 and the support adjustment spring 31.

[0048] Furthermore, the fixed base 23 also includes a telescopic plate 233 fixed to the fixed plate 231. The length of the telescopic plate 233 is adjustable, and its lower end is configured to abut the upper side of the support base 3. In this embodiment, when the lower ends of the fixed plate 231 and the telescopic plate 233 simultaneously abut the upper side of the support base 3, the stability of the deck body 22 is improved. Furthermore, when the height of the deck body 22 is adaptively raised, the position of the support base 3 does not need to be readjusted. Instead, the telescopic plate 233 is extended to abut the support base 3, allowing the support base 3 to support the deck body 22, thereby improving convenience. It should be noted that the specific form of the telescopic plate 233 is not limited. In one embodiment, the telescopic plate 233 includes an upper plate body and a lower plate body that are detachably connected in the vertical direction. The upper and lower plates are connected by screws, thereby making the length of the telescopic plate 233 adjustable. In this embodiment, the telescopic plate 233 is configured in the form of a telescopic cylinder to improve convenience.

[0049] Furthermore, the connecting plate 232 is screwed to the deck body 22 so that the connecting plate 232 can be detached from the deck body 22. In this way, when the movable deck 2 needs to be adjusted to the climbing state, the screws between the connecting plate 232 and the deck body 22 can be removed to detach the connecting plate 232 from the deck body 22, so that the deck body 22 can be stably contacted with the bottom wall of the cargo hold 11 or the base 4, thereby facilitating the stable transfer of the small mechanical equipment 300 to the deck body 22.

[0050] Furthermore, the movable deck 2 in the first position and the movable deck 2 in the second position are arranged alternately. In this way, the large machinery and equipment 200 and the small machinery and equipment 300 can be shipped simultaneously, and the large machinery and equipment 200 and the small machinery and equipment 300 can be transported to the cargo hold 11 in sequence. After the driver drives the large machinery and equipment 200 to the designated location, the driver gets off the vehicle and waits nearby; after the small machinery and equipment 300 is loaded onto the trailer and transported to various decks inside the ro-ro ship 100 by the tractor, the tractor head detaches from the trailer and drives out, and at this time, the driver and the large machinery and equipment 200 still in the cargo hold 11 also drive out together, improving convenience.

[0051] Specifically, see Figure 11 The movable deck 2 in the second position is located in the center of the cargo hold 11, rather than at either end. For a row of decks arranged along the ship's length and symmetrically along the ship's width, only one of the corresponding symmetrical positions along the symmetry axis is set as the second position. The horizontal direction in the figure represents the length of the ro-ro ship 100, and the vertical direction represents the width of the ro-ro ship 100. Solid lines represent an even number of movable decks 2 along the ship's length, while dashed lines represent an odd number. The solid and dashed shaded areas represent the positions of the movable decks 2 in the second position when the number of movable decks 2 is even and odd, respectively.

[0052] Ro-ro ship 100 has m rows of movable decks 2 arranged parallel to each other along the ship's length, with each row containing n movable decks 2. Taking a single row of n movable decks 2 along the ship's length as an example, they are numbered (1, 2, ..., n). Second positions are provided at the positions of the 2nd to n-1st rows, and not at the positions of the 1st and nth rows. The 1st and nth rows, which do not have second positions, are excluded from the figure.

[0053] When n is an odd number, the (n+1) / 2th movable deck 2 at the symmetry axis is the symmetry center, and the symmetry center is not set as the second position. The 2nd and n-1th, 3rd and n-2th movable decks 2 are all symmetric positions. Only one of these two mutually symmetrical positions is set as the second position. For example, in (2, n-1), if the position of the 2nd block is set as the second position, the position of the n-1th block is not set, and so on.

[0054] When n is an even number, the position of the symmetry axis is between the n / 2th and (n+1) / 2th, and the n / 2th and (n+1) / 2th, the 2nd and n-1th, and the 3rd and n-2th movable decks 2 are all symmetrical positions. Among these two mutually symmetrical positions, only one is selected to be set as the second position. For example, in (n / 2, (n+1) / 2), if the position where the n / 2th block is located is selected as the second position, the position where the (n+1) / 2th block is located is not set, and so on.

[0055] The number and positions of the movable decks 2 in the second position in each column are set as described above, while the positions of the movable decks 2 in the second position between every two adjacent columns are staggered. For example, if the 1st and 2nd columns, or the 2nd and 3rd columns are adjacent, if the position of the n-1th block in the 1st column is set as the second position, then the position of the n-2nd block in the 2nd column is set as the second position, while the position of the n-1th block is not set; and if the position of the n-1st block in the 3rd column is set as the second position, while the position of the n-2th block is not set, and the same rules apply to the other columns.

[0056] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A roll-on / roll-off ship, characterized in that: It includes: The hull has a plurality of cargo holds, and the side wall of each cargo hold is provided with a plurality of mounting portions in the vertical direction; and a plurality of movable decks corresponding one to each of the cargo holds, each movable deck being transversely arranged in the corresponding cargo hold and provided with a fixing portion cooperating with the mounting portion, the fixing portion being detachably connected to the mounting portion so that the height of the movable deck is adjustable, and having a first position in which the movable deck is fixed to the top of the cargo hold and a second position in which the movable deck is fixed to the middle of the cargo hold. When the movable deck is in the second position, the cargo hold is divided into two loading cavities in the vertical direction for loading cargo; Wherein, the mounting portion is a mounting screw hole provided on two opposite side walls of the cargo hold; The movable deck includes a deck body and fixing seats connected to opposite ends of the deck body, the fixing seats are provided with fixing screw holes corresponding to the mounting screw holes, and the fixing screw holes constitute the fixing parts; The ro-ro ship further includes fixing bolts provided corresponding to the fixing seats, wherein the fixing bolts can be passed through the corresponding fixing screw holes and the mounting screw holes, so that the fixing seats can be detachably fixed to the cargo hold; The fixing seat includes a fixing plate and a connecting plate, the fixing plate and the connecting plate are rotatably connected around an axis in the horizontal direction, the connecting plate is connected to the deck body, and the fixing screw hole is formed in the fixing plate; Each of the movable decks has one fixing seat fixed to the cargo hold side wall, and the other fixing seat is detached from the cargo hold side wall, so that the corresponding end of the deck body can abut against the cargo hold bottom wall in a climbing state; The ro-ro ship further includes a support seat and a support bolt. The support seat is located at the lower end of the fixing plate and is provided with a support screw hole that matches the mounting screw hole. The support bolt is passed through the mounting screw hole and the support screw hole, so that the position of the support seat can be adjusted. Wherein, a support adjustment spring is provided on the upper side of the support seat corresponding to the deck body, so as to adjust the inclination angle of the movable deck when it is in the climbing state.

2. The ro-ro ship according to claim 1, characterized in that: The ro-ro ship further comprises a base detachably fixed to each cargo hold bottom wall, wherein the position of the base on the cargo hold bottom wall is adjustable and the base is detached from the cargo hold side wall corresponding to the end of the deck body; Wherein, an auxiliary adjustment spring is provided on the upper side of the base corresponding to the deck body.

3. The ro-ro ship according to claim 2, characterized in that: The base is provided with an extended ramp corresponding to the deck body, and the extended ramp extends from one end of the deck body to the bottom wall of the cargo hold.

4. The ro-ro ship according to claim 2 or 3, characterized in that: The bottom wall of the cargo hold is provided with a plurality of screw holes, and the plurality of screw holes are arranged at intervals along the length direction of the deck body; The base is provided with a locking hole corresponding to the screw hole, and the roll-on / roll-off ship further includes a locking bolt passing through the locking hole and the screw hole, so that the position of the base on the bottom wall of the cargo hold is adjustable.

5. The ro-ro ship according to claim 1, characterized in that: The fixing seat further comprises a telescopic plate fixed to the fixing plate. The length of the telescopic plate is adjustable, and the lower end of the telescopic plate is used to abut against the upper side of the supporting seat.

6. The ro-ro ship according to claim 1, characterized in that: The connecting plate is screwed to the deck body so that the connecting plate can be detached from the deck body.

7. The ro-ro ship according to claim 1, characterized in that: The movable deck in the first position and the movable deck in the second position are alternately arranged in sequence.

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