A side loading system

Abstract

The present application discloses a side loading system, including a cargo hold opening and closing assembly and a telescopic load-bearing assembly. The telescopic load-bearing assembly includes a transverse frame located at a corresponding position on the cabin top, a power unit for driving the transverse frame, and a load-bearing unit fixedly arranged on the transverse frame. In an embodiment of the present application, the above-mentioned side loading system is adopted. The porthole has two working modes when opened: upper opening and lower opening. In the lower opening state, the porthole can be used as a temporary loading platform for cargo. In the upper opening state, an open water space can be provided at the side plate for floating cargo. When the transversely movable transverse frame drives the load-bearing unit to move to the corresponding position of the cargo, the cargo can be hoisted by a steel wire rope, and the lifting and translation operations of the cargo can be realized by the cooperation of the transverse frame and the electric winch assembly. Compared with the side-swing and elevator loading and unloading systems, it has the characteristics of simple structure, high reliability and applicability.

Description

Technical Field

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

[0002] For operating vessels like cruise ships and passenger ferries, in addition to the primary personnel and cargo access between ship and shore, their sideways also serve as access points for luggage, supplies, fuel, and garbage. Some also handle the loading and unloading of small boats and other equipment. These sideways are often located in the side cabins, which are not spacious enough. Direct access to the target cabin via cargo access points between ship and shore (such as gangplanks) is not possible, necessitating a customized side loading system.

[0003] Current side loading systems are mostly custom-built side-swing or lift systems for loading and unloading unitized cargo, pallets, or paper rolls. These systems are tailored to specific cargoes and have a limited loading and unloading range. With the continuous evolution of applications for operating vessels such as cruise ships and ferries, the scope of side loading is expanding, necessitating a universal loading and unloading system for side compartments to accommodate the increasingly diverse cargo types being loaded. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a side loading system with simple structure, strong stability and applicability.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions.

[0006] The present application provides a side loading system, a cargo hold opening and closing assembly, and a telescopic load-carrying assembly;

[0007] The cargo hold opening and closing assembly includes a porthole, an opening and closing operating cylinder, and an upper opening hinge and a lower opening hinge fixedly arranged at the opening position of the cargo hold. The upper opening hinge is located at a corresponding position on the cabin top, and the lower opening hinge is located at a corresponding position on the cabin deck.

[0008] A fixed hinge is fixedly provided on the inner wall of the cargo compartment, a driven hinge is fixedly provided on the end surface of the porthole close to the cargo compartment, the fixed end of the opening and closing operating cylinder is hinged to the fixed hinge, and the telescopic end is hinged to the driven hinge;

[0009] The telescopic load-carrying assembly includes a transverse frame located at a corresponding position on the cabin top, a power unit for driving the transverse frame, and a load-carrying unit fixedly arranged on the transverse frame;

[0010] The transverse frame can be transversely moved to the load unit located outside the cargo hold, and the load unit includes an electric winch assembly, a guide wheel assembly, and a steel wire rope, one end of the steel wire rope is connected to the electric winch assembly, and the other end is passed around the guide wheel assembly and is used to connect to the load;

[0011] The upper hinge is located on the side of the transverse frame away from the cabin deck, and the two ends of the porthole in the vertical direction can be hinged to the upper hinge and the lower hinge respectively.

[0012] It is further defined that in the above-mentioned side loading system, the telescopic load-carrying assembly also includes a guide groove arranged at the top position of the cabin, and a guide sliding block slidably connected to the guide groove is fixedly provided on the transverse frame.

[0013] It is further defined that in the above-mentioned side loading system, there are two guide grooves, and the two guide grooves are respectively located on two opposite side walls of the cargo compartment.

[0014] It is further defined that the above-mentioned side loading system, wherein the power unit includes a multi-stage electric push rod fixedly arranged on the top of the cabin, the telescopic end of the multi-stage electric push rod faces the side of the cargo hold opening and is fixedly connected to the transverse frame.

[0015] It is further defined that in the above-mentioned side loading system, the fixed end of the multi-stage electric push rod is hinged to the cabin roof, and the telescopic end is hinged to the transverse frame.

[0016] It is further defined that in the above-mentioned side loading system, the load unit further comprises a mounting frame fixedly disposed on the traverse frame, and the electric winch assembly comprises a winding motor fixedly connected to the mounting frame, and a winch wheel fixedly connected to an output end of the winding motor;

[0017] Wherein, the steel wire rope is wound on the winch.

[0018] It is further defined that in the above-mentioned side loading system, the guide wheel assembly includes a first guide wheel and a second guide wheel rotatably mounted on a mounting frame;

[0019] The rotation axis of the first guide wheel is located in the vertical direction, and the rotation axis of the second guide wheel is located in the horizontal direction. The end of the wire rope away from the winch is passed around the first guide wheel and the second guide wheel in sequence and is used to connect the load.

[0020] It is further defined that in the above-mentioned side loading system, the winch is provided with two winding parts along the axial direction, and a steel wire rope is wound on each of the two winding parts;

[0021] The first guide wheel and the second guide wheel of the guide wheel assembly are symmetrically provided with two groups on the mounting frame about the first reference plane, and the wire ropes on the two winding parts are respectively passed around the two groups of first guide wheels and the second guide wheels;

[0022] Among them, the axial direction of the winch is parallel to the lateral direction of the lateral frame, the first reference plane is specifically set as the axial vertical plane of the winch at the connection position of the two winding parts, and the second guide wheel is located on the side of the first guide wheel of the corresponding group away from the first reference plane.

[0023] It is further defined that in the above-mentioned side loading system, the load carrying units are provided in two groups symmetrically about the second reference plane on the transverse frame;

[0024] The second reference plane is specifically set to be a bisecting plane between two opposite side walls of the cargo compartment.

[0025] It is further defined that in the above-mentioned side loading system, the transverse frame is provided with a connecting beam perpendicular to the two opposite side walls of the cargo hold, and the mounting frame is fixedly arranged on the connecting beam.

[0026] The present invention has at least the following beneficial effects:

[0027] When opened, the gangway has two working modes: upward opening and downward opening. In the downward opening state, the gangway can be used as a temporary loading platform for cargo. In the upward opening state, it can provide an open water space for floating cargo at the side plate. When the transversely movable frame drives the load-carrying unit to move to the corresponding position of the cargo, the cargo can be hoisted by a wire rope, and the lifting and translation operations of the cargo can be realized through the cooperation of the transverse frame and electric winch assembly. Compared with the side-swing and elevator loading and unloading systems, it has the characteristics of simple structure, reliability and strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of the side loading system of an embodiment of the present application when the "porthole 400" is closed;

[0029] Figure 2 This is a structural diagram of the "transverse frame 210" part of the side loading system of an embodiment of the present application;

[0030] Figure 3 This is a schematic structural diagram of the side loading system of an embodiment of the present application when the "porthole 400" is open;

[0031] Figure 4 This is a structural diagram of the "load unit 600" part of the side loading system in an embodiment of the present application;

[0032] Figure 5 This is a structural diagram of the side loading system of the embodiment of the present application, with the "porthole 400" open and the "load unit 600" in a loaded state;

[0033] Figure 6This is a structural diagram of the side loading system of an embodiment of the present application in the loaded state of the "load unit 600";

[0034] Figure 7 This is a structural diagram of the side loading system of an embodiment of the present application when the "porthole 400" is open and the "load unit 600" is in a loaded state.

[0035] Reference numerals

[0036] Side plate-110, cabin deck-120, working cabin-130, cargo hold-140, partition longitudinal wall-150, guide groove-160, fixed hinge-170, cabin roof-180, transverse frame-210, guide slider-220, connecting beam-230, multi-stage electric push rod-300, porthole-400, driven hinge-410, upper opening hinge-420, lower opening hinge-430, opening and closing operating cylinder-500, load unit-600, mounting frame-610, winding motor-620, winch-630, wire rope-640, first guide wheel-650, second guide wheel-660. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0038] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0039] The side loading system provided by the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0040] like Figures 1 to 7 As shown, an embodiment of the present application provides a side loading system, including a cargo hold opening and closing assembly and a telescopic load-bearing assembly.

[0041] The cargo hold opening and closing assembly includes a porthole 400, an opening and closing operating cylinder 500, and an upper opening hinge 420 and a lower opening hinge 430 fixedly arranged at the opening position of the cargo hold chamber 140. The upper opening hinge 420 is located at a corresponding position of the cabin roof 180 of the cargo hold chamber 140, and the lower opening hinge 430 is located at a corresponding position of the cabin deck 120 of the cargo hold chamber 140.

[0042] A fixed hinge 170 is fixed on the inner wall of the cargo hold 140, and a driven hinge 410 is fixed on the end face of the porthole 400 close to the cargo hold 140. The fixed end of the opening and closing operating cylinder 500 is hinged to the fixed hinge 170, and the telescopic end is hinged to the driven hinge 410.

[0043] The telescopic load-carrying assembly includes a transverse frame 210 located at a corresponding position on the cabin roof 180 and capable of moving laterally, a power unit for driving the transverse frame 210 to move laterally, and a load-carrying unit 600 fixedly arranged on the transverse frame 210. The transverse frame 210 can move laterally until the load-carrying unit 600 is located outside the cargo hold 140.

[0044] The load unit 600 includes an electric winch assembly, a guide wheel assembly, and a steel wire rope 640. One end of the steel wire rope 640 is connected to the electric winch assembly, and the other end passes through the guide wheel assembly and is used to connect to the load.

[0045] Among them, the upper hinge 420 is located on the side of the transverse frame 210 away from the cabin deck 120; when the porthole 400 is closed, the two ends of the porthole 400 in the vertical direction are hinged to the upper hinge 420 and the lower hinge 430 respectively; when the porthole 400 is opened upward, the end of the porthole 400 away from the cabin deck 120 is hinged to the upper hinge 420, and when the porthole 400 is opened downward, the end of the porthole 400 away from the cabin top 180 is hinged to the lower hinge 430.

[0046] It is understandable that if Figure 1 As shown, when the two ends of the porthole 400 in the vertical direction are connected to the upper hinge 420 and the lower hinge 430 respectively, the porthole 400 can completely close the opening of the cargo hold 140. At this time, the cargo hold 140 is in a closed state, the transverse frame 210 does not extend to the outside of the cargo hold 140, and cargo can be stored in the cargo hold 140; Figure 5As shown, when the porthole 400 is connected to the lower opening hinge 430 at only the end away from the cabin roof 180, and the end away from the cabin deck 120 is not connected to the upper opening hinge 420, the telescopic end of the opening and closing operating cylinder 500 is extended to push the porthole 400 to flip toward the side away from the cargo hold 140, and at the same time, the opening and closing operating cylinder 500 adaptively rotates relative to the fixed hinge 170 to adjust the angle. At this time, the porthole 400 is in the lower opening state. When the transverse frame 210 is extended to the outside of the cargo hold 140, the porthole 400 can be used as a temporary cargo platform. The load unit 600 is located above the cargo, and the electric winch assembly can be used to retract and release the wire rope 640 to realize the lifting and loading and unloading of the cargo; Figure 7 As shown, when the porthole 400 is connected to the upper hinge 420 at only the end away from the cabin deck 120 and the end away from the cabin top 180 is not connected to the lower hinge 430, the telescopic end of the opening and closing operating cylinder 500 is extended to push the porthole 400 to flip toward the side away from the cargo hold 140. At the same time, the opening and closing operating cylinder 500 adaptively rotates relative to the fixed hinge 170 to adjust the angle. At this time, the porthole 400 is in the upper open state. When the transverse frame 210 is extended toward the outside of the cargo hold 140, since the upper hinge 420 is located on the side of the transverse frame 210 away from the cabin deck 120, the porthole 400 will not interfere with the transverse movement of the transverse frame 210. The water area at the side plate 110 is open, and floating cargo such as small boats move to the bottom of the porthole 400 and close to the side plate 110. The load unit 600 is located above the floating cargo, and the floating cargo can be loaded and unloaded by retracting and releasing the wire rope 640 through the electric winch assembly.

[0047] In an embodiment of the present application, the above-mentioned side loading system is adopted, and the porthole 400 has two working modes when opened: upper opening and lower opening. In the lower opening state, the porthole 400 can be used as a temporary loading platform for cargo. In the upper opening state, an open water space can be provided for floating cargo at the side plate 110. When the transversely movable frame 210 drives the load-carrying unit 600 to move to the corresponding position of the cargo, the cargo can be hoisted by the wire rope 640, and the lifting and translation operations of the cargo can be realized by the cooperation of the transverse frame 210 and the electric winch assembly. Compared with the side-swing and elevator loading and unloading systems, it has the characteristics of simple structure, high reliability and applicability.

[0048] In a preferred embodiment, as Figures 1 to 3 、 Figures 5 to 7 As shown, the telescopic load-carrying assembly further includes a guide groove 160 provided at the cabin top 180 , and a guide slider 220 slidably connected to the guide groove 160 is fixedly provided on the transverse frame 210 .

[0049] It can be understood that the power unit can drive the guide slider 220 to slide in the guide groove 160, thereby driving the transverse frame 210 and the load unit 600 to move transversely relative to the cargo compartment 140. At this time, the guide groove 160 can support and guide the transverse movement of the transverse frame 210.

[0050] In a preferred embodiment, as Figure 3 、 Figure 6 As shown, two guide grooves 160 are provided at the position of the cabin top 180 , and the two guide grooves 160 are respectively located at corresponding positions of two opposite side walls of the cargo compartment 140 .

[0051] It can be understood that the sliding cooperation between the two guide grooves 160 and the guide slider 220 on the transverse frame 210 can improve the stability of the overall transverse movement of the transverse frame 210.

[0052] In a preferred embodiment, as Figures 1 to 3 、 Figure 5 、 Figure 7 As shown, the power unit includes a multi-stage electric push rod 300 fixedly arranged on the cabin roof 180 , and the telescopic end of the multi-stage electric push rod 300 is located on the opening side of the cargo compartment 140 and is fixedly connected to the transverse frame 210 .

[0053] Among them, when the telescopic end of the multi-stage electric push rod 300 is extended, it can drive the transverse frame 210 to move toward the opening side of the cargo compartment 140, thereby moving the load unit 600 to the outside of the cargo compartment 140 to realize the loading and unloading operation of the cargo.

[0054] It is understandable that the setting form of the power unit is not limited to the above-mentioned one. For example, it can also be set to other transverse movement structures such as gear racks, threaded screws, etc., as long as it can realize the transverse movement drive of the transverse movement frame 210. It will not be elaborated here.

[0055] In a preferred embodiment, the fixed end of the multi-stage electric push rod 300 is hinged to the cabin roof 180 , and the telescopic end is hinged to the transverse frame 210 .

[0056] It can be understood that through the above-mentioned connection method, when the multi-stage electric push rod 300 drives the transverse frame 210 to move transversely, the multi-stage electric push rod 300 can be provided with a greater longitudinal degree of freedom, that is, the multi-stage electric push rod 300 can adapt the deflection angle to adapt to the height of the connection point with the transverse frame 210, thereby improving its tolerance for the longitudinal position error with the transverse frame 210, and further improving the stability and reliability of the multi-stage electric push rod 300 in driving the transverse frame 210 transversely.

[0057] In a preferred embodiment, as Figures 3 to 7As shown, the load unit 600 further includes a mounting frame 610 fixedly mounted on the transverse frame 210 , and the electric winch assembly includes a winding motor 620 fixedly connected to the mounting frame 610 and a winch wheel 630 fixedly connected to the output end of the winding motor 620 .

[0058] The steel wire rope 640 is wound on the winch 630 .

[0059] It is understandable that when the winding motor 620 drives the winch 630 to rotate, the wire rope 640 on the winch 630 can be tightened or loosened, thereby achieving lifting control of the wire rope 640 away from the end connected to the load at the winch 630.

[0060] In a preferred embodiment, as Figures 3 to 7 As shown, the guide wheel assembly includes a first guide wheel 650 and a second guide wheel 660 rotatably disposed on the mounting frame 610 .

[0061] Among them, the rotation axis of the first guide wheel 650 is located in the vertical direction, and the rotation axis of the second guide wheel 660 is located in the horizontal direction. The end of the wire rope 640 away from the winch 630 passes around the first guide wheel 650 and the second guide wheel 660 in sequence and is used to connect the load.

[0062] It is understandable that the setting form of the guide wheel assembly is not limited to the above-mentioned one, as long as it can guide the wire rope 640, which will not be elaborated here.

[0063] In a preferred embodiment, as Figures 3 to 7 As shown, two winding parts are provided on the winch 630 along the axial direction, and steel wire ropes 640 are respectively wound on the two winding parts.

[0064] Two groups of first guide wheels 650 and second guide wheels 660 are symmetrically provided on the mounting frame 610 about the first reference plane, and the wire ropes 640 on the two winding parts are respectively passed around the two groups of first guide wheels 650 and second guide wheels 660.

[0065] Among them, the axial direction of the winch 630 is parallel to the lateral direction of the lateral frame 210, and the first reference plane is specifically set as the axial vertical plane of the winch 630 at the connection position of the two winding parts. The second guide wheel 660 is located on the side of the first guide wheel 650 of the corresponding group away from the first reference plane.

[0066] It can be understood that the winding of the two steel ropes 640 can be controlled simultaneously by the winch 630. When the two steel ropes 640 are respectively led out from the two second guide wheels 660, the cargo can be connected at two points, thereby improving the loading and unloading stability of the cargo.

[0067] In a preferred embodiment, as Figure 3 、 Figure 6As shown, two groups of load carrying units 600 are symmetrically arranged on the transverse frame 210 with respect to the second reference plane.

[0068] The second reference plane is specifically set to be a bisecting plane between two opposite side walls of the cargo compartment 140 .

[0069] It should be noted that the side walls of the cargo hold chamber 140 refer to the inner walls on both sides in the front-to-back direction as shown in the figure, and the bisecting plane refers to a plane located between two planes (i.e., the two opposite side walls of the cargo hold chamber 140) and at the same distance from the two planes.

[0070] It can be understood that since the winch 630 of a load unit 600 can control the winding of two steel ropes 640 at the same time, the two groups of load units 600 can achieve connection at the four corners of the cargo through four steel ropes 640, further improving the connection reliability and loading and unloading stability of the cargo. At the same time, the four lifting points of the two groups of load units 600 can also be operated separately, which is more adaptable to the cargo and further improves the practicality of the loading system.

[0071] In a preferred embodiment, as Figure 3 、 Figure 6 As shown, the transverse frame 210 is provided with a connecting beam 230 perpendicular to two opposite side walls of the cargo compartment 140, and the mounting frame 610 is fixedly arranged on the connecting beam 230.

[0072] In a preferred embodiment, as Figure 1 、 Figure 3 、 Figures 5 to 7 As shown, the working compartment 130 is further included, which is separated from the cargo compartment 140 by a longitudinal partition wall 150 .

[0073] When the transverse moving frame 210 is not extended out of the cargo compartment 140 , a portion of the transverse moving frame 210 is located at a position corresponding to the cabin roof 180 of the working compartment 130 .

[0074] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0075] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A side loading system, characterized in that: Including cargo hold opening and closing components and telescopic load-bearing components; The cargo hold opening and closing assembly includes a porthole, an opening and closing operating cylinder, and an upper opening hinge and a lower opening hinge fixedly arranged at the opening position of the cargo hold. The upper opening hinge is located at a corresponding position on the cabin top, and the lower opening hinge is located at a corresponding position on the cabin deck. A fixed hinge is fixedly provided on the inner wall of the cargo compartment, a driven hinge is fixedly provided on the end surface of the porthole close to the cargo compartment, the fixed end of the opening and closing operating cylinder is hinged to the fixed hinge, and the telescopic end is hinged to the driven hinge; The telescopic load-carrying assembly includes a transverse frame located at a corresponding position on the cabin top, a power unit for driving the transverse frame, and a load-carrying unit fixedly arranged on the transverse frame; The transverse frame can be transversely moved to the load unit located outside the cargo hold, and the load unit includes an electric winch assembly, a guide wheel assembly, and a steel wire rope, one end of the steel wire rope is connected to the electric winch assembly, and the other end is passed around the guide wheel assembly and is used to connect to the load; The upper hinge is located on the side of the transverse frame away from the cabin deck, and the two ends of the porthole in the vertical direction can be hinged to the upper hinge and the lower hinge respectively; The telescopic load-carrying assembly further comprises a guide groove provided at the cabin top position, and a guide sliding block slidably connected to the guide groove is fixedly provided on the transverse movement frame; The load unit further comprises a mounting frame fixedly mounted on the transverse frame, and the electric winch assembly comprises a winding motor fixedly connected to the mounting frame and a winch wheel fixedly connected to the output end of the winding motor; wherein the steel wire rope is wound on the winch wheel; The transverse frame is provided with a connecting crossbeam perpendicular to two opposite side walls of the cargo compartment, and the installation frame is fixedly arranged on the connecting crossbeam.

2. A side loading system according to claim 1, characterized in that: There are two guide grooves, which are respectively located on two opposite side walls of the cargo compartment.

3. A side loading system according to claim 1, characterized in that: The power unit includes a multi-stage electric push rod fixedly arranged on the cabin roof, the telescopic end of the multi-stage electric push rod faces the side of the cargo compartment opening and is fixedly connected to the transverse frame.

4. A side loading system according to claim 3, characterized in that: The fixed end of the multi-stage electric push rod is hinged to the cabin top, and the telescopic end is hinged to the transverse movement frame.

5. A side loading system according to claim 1, characterized in that: The guide wheel assembly includes a first guide wheel and a second guide wheel rotatably arranged on the mounting frame; The rotation axis of the first guide wheel is located in the vertical direction, and the rotation axis of the second guide wheel is located in the horizontal direction. The end of the wire rope away from the winch is passed around the first guide wheel and the second guide wheel in sequence and is used to connect the load.

6. A side loading system according to claim 1 or 5, characterized in that: The winch is provided with two winding parts along the axial direction, and a steel wire rope is wound on each of the two winding parts; The first guide wheel and the second guide wheel of the guide wheel assembly are symmetrically provided with two groups on the mounting frame about the first reference plane, and the wire ropes on the two winding parts are respectively passed around the two groups of first guide wheels and the second guide wheels; Among them, the axial direction of the winch is parallel to the lateral direction of the lateral frame, the first reference plane is specifically set as the axial vertical plane of the winch at the connection position of the two winding parts, and the second guide wheel is located on the side of the first guide wheel of the corresponding group away from the first reference plane.

7. A side loading system according to claim 6, characterized in that: The load-carrying units are provided in two groups symmetrically on the transverse frame with respect to the second reference plane; The second reference plane is specifically set to be a bisecting plane between two opposite side walls of the cargo compartment.

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