Extension section device for container loading and working method thereof

Abstract

The invention discloses an extension section device for loading of a container and a working method of the extension section device. A first extension section and a second extension section are spliced in parallel to form a goods access channel; the fixed installation assembly and the base assembly serve as bases, reserved hole positions are formed in the fixed installation assembly and the base assembly, the quick-release connector assembly penetrates through the reserved hole positions, and the lower end of the quick-release connector assembly is provided with a structure clamped into an external sliding rail. The fixed mounting assembly comprises a fixed mounting base, a first extension section and a second extension section are rotationally connected with the fixed mounting base through a rotating shaft, and the first extension section and the second extension section have a vertical storage state and a horizontal unfolding state; the first extension section and the second extension section are provided with extension section bottom plates, and middle rolling rods and edge rolling rods which are arranged in an array mode are arranged on the upper surfaces of the extension section bottom plates. The adaptability with ground service equipment and the structural impact resistance are enhanced while operation convenience and operation safety are ensured, and the high-strength air freight transport vehicle is suitable for a high-strength air freight transport environment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of air freight, and relates to an extension section device for container loading and a working method thereof. BACKGROUND

[0002] In the air freight container loading and unloading system, the extension section device is a key component connecting the cargo hold of the aircraft and the ground loading and unloading equipment, and its design needs to consider the transportation convenience, operation efficiency and structural reliability. The traditional extension section device often adopts a single structure, and lacks effective folding and locking mechanism in the non-working state (such as during air transportation), resulting in a large occupied space and increasing the complexity of transportation and storage. In addition, in the working state (during container loading and unloading), such device often relies on a single fixing mode, and the load transmission path is not clear, which may affect the stability of loading and unloading due to uneven stress, and even cause local overload to the aircraft door or slide rail. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide an extension section device for container loading and a working method thereof, which can ensure operation convenience and safety, and strengthen the adaptability to ground equipment and the structural impact resistance, and is suitable for high-strength air freight environment.

[0004] To achieve the above purpose, the following technical solutions are adopted in the present application: An extension section device for container loading, comprising a first extension section, a second extension section, a fixed installation assembly and a base assembly; The first extension section and the second extension section are parallel and spliced to form a cargo access channel; the fixed installation assembly and the base assembly serve as a base, and the fixed installation assembly and the base assembly are internally provided with a reserved hole position, and a quick-release connector assembly passes through the reserved hole position, and the lower end of the quick-release connector assembly has a structure for clamping into an external slide rail; The fixed installation assembly comprises a fixed installation base, and the first extension section and the second extension section are rotationally connected to the fixed installation base through a rotating shaft, and the first extension section and the second extension section have a vertical storage state and a horizontal expansion state; the first extension section and the second extension section have an extension section bottom plate, and the upper surface of the extension section bottom plate is provided with an array of middle rollers and edge rollers.

[0005] Optionally, the middle rollers are arrayed in the central region of the plate surface along the length direction of the extension section bottom plate, and the edge rollers are symmetrically distributed on the left and right sides of the middle rollers.

[0006] Optionally, guide rollers are arranged on the outer edges of the extension section bottom plate and on both sides of the entrance, the guide rollers protrude from the plane of the extension section bottom plate, and the guide rollers form a guide structure for the container to enter.

[0007] Optionally, the bottom surface of the extension section bottom plate is fixed with a hatch support, which is pressed on the external carrier hatch lock pin when the extension section bottom plate is in the horizontal unfolded state.

[0008] Optionally, a steel bushing is press-fitted at the rotating connection between the fixed mounting assembly and the first or second extension section, and a locking hole is arranged between the fixed mounting assembly and the first or second extension section, and a quick-release pin is inserted into the locking hole to lock the position of the first or second extension section.

[0009] Optionally, an anti-slip-out assembly is embedded and mounted at the middle-rear position of the extension section bottom plate, and the anti-slip-out assembly comprises an anti-slip-out lock arm, which has an upright state extending out of the upper surface of the extension section bottom plate and a prostrate state retracting into the interior of the extension section bottom plate.

[0010] Optionally, the anti-slip-out assembly further comprises a shell bracket, a spring, a shaft pin and a pedal; the shell bracket is fixed in the interior of the extension section bottom plate, the anti-slip-out lock arm is located at the upper opening of the shell bracket, the spring is abutted below the anti-slip-out lock arm, the shaft pin is transversely inserted into the side surface of the anti-slip-out lock arm, and the pedal is arranged adjacent to the anti-slip-out lock arm and mechanically linked with the shaft pin.

[0011] Optionally, the quick-release joint assembly comprises a half joint and a torsion piece, the half joint is a rod structure, the torsion piece is mounted at the top end surface of the half joint, the bottom of the half joint is provided with a T-shaped block, the torsion piece has an indicating arrow, and the direction of the indicating arrow has an angle corresponding relationship with the direction of the T-shaped block.

[0012] Optionally, the first extension section and the second extension section are left-right symmetrical, and the bottom plane of the fixed mounting assembly and the base assembly is provided as a plane structure adhering to the upper surface of the external slide rail.

[0013] A working method of an extension section device for container loading, comprising the following processes: placing the fixed mounting assembly and the base assembly on the external slide rail; operating the quick-release joint assembly to make the lower end of the quick-release joint assembly deeply enter the interior slot of the external slide rail and rotate to lock, and completing the fixation of the fixed mounting assembly and the base assembly; exerting force on the first extension section and the second extension section to make the first extension section and the second extension section turn downward from the vertical storage state to the horizontal unfolded state relative to the fixed mounting base; when the first extension section and the second extension section are in the horizontal unfolded state, the extension section bottom plate extends outward; the goods move on the middle roller and the edge roller for loading or unloading; after the task is completed, the first extension section and the second extension section are turned upward to the vertical storage state.

[0014] Compared with the prior art, the present application has the following beneficial effects: This invention achieves vertical storage of the device in its non-operating state through the rotational engagement of the fixed installation components and the extension section, as well as the quick-release pin locking mechanism, effectively solving the problems of cabin space occupation and transportation. In the operating state, the precise pressing of the door support component under the extension section's bottom plate with the aircraft cabin door lock pin establishes a multi-point load transfer path, effectively transferring the container's weight to the high-strength door lock pin, avoiding local overload damage to the door frame or slide rail caused by single cantilever force. At the same time, in conjunction with the rotational locking structure of the quick-release connector assembly and the spring-linked mechanical locking mechanism of the anti-slip assembly, it achieves rapid disassembly and assembly with the aircraft slide rail and reduces cargo movement resistance, while constructing a physical anti-slip barrier that allows the container to only enter and not exit. Thus, while ensuring loading and unloading efficiency, it significantly improves the overall structural strength and operational safety of the system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the extension section device for container loading according to the present invention; Figure 2 This is a schematic diagram of the first extension segment structure of the present invention; Figure 3 This is a schematic diagram of the second extension section of the present invention; Figure 4 This is a schematic diagram of the extension section device of the present invention in its air-transport state. Figure 5 This is a schematic diagram of the anti-slip component structure of the present invention; Figure 6 This is a schematic diagram of the quick-release connector assembly of the present invention.

[0016] Wherein: 1-First extension section, 2-Second extension section, 3-Edge roller, 4-Intermediate roller, 5-Base assembly, 6-Handle, 7-Anti-slip assembly, 8-Door support, 9-Fixed mounting assembly, 10-Guide roller, 11-Extension base plate, 12-Steel bushing, 13-Quick release pin, 14-Fixed mounting base, 15-Quick release connector assembly, 16-Slide rail, 17-Anti-slip locking arm, 18-Spring, 19-Shell frame, 20-Shaft pin, 21-Pedal, 22-Half connector, 23-Twist plate. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] like Figure 1 As shown, the extension section device for container loading according to the present invention includes extension section 1 and extension section 2, and the extension section device is connected and installed on the aircraft slide rail 16 via quick-release coupling assembly 15.

[0020] like Figure 1 and Figure 3 As shown, on the main surfaces of the first extension section 1 and the second extension section 2, the functional components are spatially distributed according to the trajectory of cargo movement. The extension section bottom plate 11, serving as the main plane for carrying cargo, has a dense roller system arranged on its upper surface. Fourteen intermediate rollers 4 are arranged in an array along the length of the extension section, i.e., the cargo entry and exit direction, in the central area of ​​the plate, forming the main load-bearing and conveyor belt. On the left and right sides of the intermediate rollers 4, six pairs of edge rollers 3 are symmetrically distributed, collectively covering most of the plate width to ensure uniform support for the container regardless of its width. Guide rollers 10 are arranged at the outermost edge of the extension section bottom plate 11 and on both sides of the entrance. These rollers are slightly protruding or at a guiding angle, located at the very front of the container entering the cabin, serving as an introduction. Furthermore, handles 6 are installed on the side frames of the first extension section 1 or the second extension section 2, or in easily accessible, non-interference areas, to facilitate the application of force by personnel.

[0021] The main structure of the entire extension section device is composed of a first extension section 1 and a second extension section 2, assembled symmetrically or side-by-side. This split layout together forms the main channel for goods to enter and exit. Figure 4As shown, the base of the device, i.e., the side closest to the cabin interior, is firmly seated on the aircraft's slide rail 16. The fixed mounting assembly 9 and the base assembly 5 serve as the base of the device, with their bottom surfaces tightly abutting the upper surface of the slide rail 16. To achieve a mechanical connection between the two, a quick-release coupling assembly 15 is installed through pre-drilled holes in the fixed mounting assembly 9 and the base assembly 5, with its lower end extending into an internal groove in the slide rail 16, and secured by rotational locking. Within the internal structure of the fixed mounting assembly 9, the fixed mounting base 14 provides the main support frame, and the steel bushing 12 is press-fitted or embedded in the rotating connection, serving as a bearing seat for the extension body's tilting motion, ensuring coaxiality and stability during the tilting action.

[0022] Regarding the vertical position and support of the device, when the device is in its horizontally deployed working state, the extension section base plate 11 extends cantilevered outwards towards the cabin. At this time, the eight door support members 8 located at the bottom of the device play a crucial role in vertical positioning. The door support members 8 are fixed to the lower surface of the extension section base plate 11, and their vertical positions are precisely calibrated to correspond precisely to and press against the locking pin positions of the aircraft cabin door, thus forming a stable lower support point. When the device needs to be stored, the quick-release pin 13 is inserted into the locking hole of the fixed mounting assembly 9 that coincides with the extension section body. This locking position is located above or to the side of the rotation axis, used to lock the vertically flipped device to the side close to the cabin interior wall.

[0023] The anti-slip assembly 7 is embedded in the middle and rear section of the extension section floor plate 11, which is the necessary path for the container to fully enter the cargo hold. For example... Figure 6 As shown, the main body of the anti-slip assembly 7 is enclosed by a housing 19, which is fixed inside the plate. The anti-slip locking arm 17 is located at the upper opening of the housing 19 and can extend out of the plate surface. A spring 18 is installed below the anti-slip locking arm 17 to provide a rebound force. The pivot pin 20 is transversely inserted into the limiting mechanism on the side of the locking arm. The pedal 21 is arranged next to the anti-slip locking arm 17, and its surface is flush with or slightly higher than the extension section bottom plate 11, making it convenient for personnel to operate by foot. Regarding the internal structure of the quick-release connector assembly 15, the half connector 22 is the main rod, and the torsion plate 23 is installed on the top end face of the half connector 22. Its indicator arrow maintains a specific angular correspondence with the direction of the T-shaped block at the bottom of the half connector 22, ensuring that the operator can determine the engagement position of the bottom T-shaped block in the slide rail 16 by observing the torsion plate 23 at the top.

[0024] When the extension unit is in operation, i.e., when it needs to perform container loading and unloading tasks, the operator first pulls out the quick-release pin 13 used for locking, grasps the handle 6 located on the side of the unit, and flips the originally vertically retracted first extension 1 and second extension 2 downwards until the extension unit bottom plate 11 is in a horizontal state and extends outwards from the cabin. During this unfolding process, the eight door support members 8 located below the unit play a crucial role in load transfer. These door support members 8 are precisely calculated in position and will accurately press against the locking pins of the aircraft cabin door after the unit is flattened. They utilize the high strength characteristics of the door locking pins to distribute the huge vertical load generated when the container passes through, avoiding the extension unit being suspended in the air or causing destructive compression to the cabin door frame, thus ensuring the structural safety of the loading and unloading operation. At the same time, in order to facilitate the smooth movement of the container, a roller system is arranged on the surface of the extension unit bottom plate 11, including 14 intermediate rollers 4 located in the central area and 6 pairs of edge rollers 3 distributed on both sides. These rollers convert the sliding friction between the container base plate and the device surface into rolling friction, significantly reducing pushing and pulling resistance. More importantly, guide rollers 10 are specially installed at the outermost left and right ends of the device. These rollers are arranged slightly above the plane or at a specific angle. When the container enters, the guide rollers 10 not only physically limit and guide the container, allowing it to enter the cabin along a predetermined straight path, but also effectively absorb the lateral impact force generated when the container deviates. This provides the dual function of protecting the aircraft door frame and the container itself from rigid collision damage.

[0025] During the loading process, the bottom of the container naturally presses down on the upright anti-slip locking arm 17, forcing it to overcome the resistance of the spring 18 and fall downwards. Once the locking arm is completely flattened, the pivot pin 20 automatically inserts into the locking hole next to the anti-slip locking arm 17 under mechanical linkage, locking the arm in a horizontal position. The ingenuity of this design lies in the fact that it allows subsequent containers to pass through continuously without obstruction, without being disturbed by the repeatedly bouncing locking arm. When loading is complete and an anti-slip barrier needs to be established, the operator only needs to step on the adjacent pedal 21. This action will pull out the pivot pin 20, releasing the lock on the arm. At this time, the compressed spring 18 releases energy, instantly bouncing the anti-slip locking arm 17 back to an upright position, forming a solid physical barrier that effectively prevents loaded containers from sliding backwards out of the cabin.

[0026] When the cargo mission is completed and the aircraft is ready for takeoff and enters a non-operational state, the device can quickly switch to a compact airlift mode. The operator grips handle 6 again, flipping up the first extension section 1 and the second extension section 2, rotating them around the pivot on the fixed mounting assembly 9 to a vertical position. To prevent the device from accidentally falling over during flight turbulence or takeoff and landing, locking holes were provided between the fixed mounting base 14 and the moving parts. By inserting high-strength quick-release pins 13, the device is securely locked in the flipped-up position. At this time, the entire extension section device is neatly stored against the cabin wall, completely avoiding the motion envelope of the cabin door, ensuring that the aircraft cabin door can be closed normally and tightly. This design not only meets the high-strength extension requirements during loading and unloading but also solves the space storage problem during airlift. Through the coordinated work of various components, the air cargo extension section device has achieved comprehensive optimization in terms of functionality, safety, and ease of operation.

[0027] A schematic diagram of the quick-release connector assembly 15 is shown below. Figure 6 As shown: Quick-release connector assembly 51 includes a half-connector 22, a self-locking hexagonal nut, a twisting plate 23, and two butterfly spring washers. The arrow on the twisting plate 23 points in the same direction as the T-shaped protrusion of the half-connector 22. The base assembly 5 and the fixed mounting assembly 9 are installed with the slide rail 16 via the quick-release connector assembly 15, enabling quick assembly and disassembly of the extension section device. When installing the base assembly 5 and the fixed mounting assembly 9 onto the slide rail 16: Insert an external hex wrench into the hexagonal hole at the top of the half-connector 22, aligning the arrow on the twisting plate 23 with the length direction of the slide rail 16 (left figure). Align the two horizontal limiting blocks at the bottom of the base assembly 5 and the fixed mounting assembly 9 with the circular holes of the slide rail 16 and insert them into the slide rail 16. Then, use the external hex wrench to rotate counterclockwise by 90° until the arrow on the twisting plate 23 is perpendicular to the length direction of the slide rail 16 (right figure). The base assembly 5 and the fixed mounting assembly 9 can then be installed onto the slide rail 16. The reverse operation allows for disassembly.

[0028] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0029] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0030] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0031] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0032] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

[0033] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this patent should not be determined by reference to the above description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed inventive subject matter.

Claims

1. An extension device for loading containers, characterized in that, Includes a first extension section (1), a second extension section (2), a fixed mounting assembly (9), and a base assembly (5); The first extension section (1) and the second extension section (2) are joined together to form a cargo entry and exit channel; the fixed installation component (9) and the base component (5) serve as the base, and the fixed installation component (9) and the base component (5) have reserved holes inside, the quick-release connector component (15) passes through the reserved holes, and the lower end of the quick-release connector component (15) has a structure that can be inserted into the external slide rail (16); The fixed installation assembly (9) includes a fixed installation base (14), and the first extension section (1) and the second extension section (2) are rotatably connected to the fixed installation base (14) via a pivot. The first extension section (1) and the second extension section (2) have a vertically folded state and a horizontally unfolded state. The first extension section (1) and the second extension section (2) have an extension section base plate (11), and the upper surface of the extension section base plate (11) is provided with an array of intermediate rollers (4) and edge rollers (3).

2. The extension section device for container loading according to claim 1, characterized in that, The middle rollers (4) are arranged in an array along the length of the bottom plate (11) of the extension section in the central area of ​​the plate surface, and the edge rollers (3) are symmetrically distributed on the left and right sides of the middle rollers (4).

3. The extension section device for container loading according to claim 1, characterized in that, Guide rollers (10) are arranged on the outer edge of the extension section bottom plate (11) and on both sides of the entrance. The guide rollers (10) protrude from the plane of the extension section bottom plate (11) and form a guide structure for the container to enter.

4. The extension section device for container loading according to claim 1, characterized in that, A hatch support (8) is fixed on the lower surface of the extension section bottom plate (11). When the extension section bottom plate (11) is in a horizontally unfolded state, the hatch support (8) is pressed against the lock pin of the external aircraft door.

5. The extension section device for container loading according to claim 1, characterized in that, A steel bushing (12) is press-fitted at the rotatable connection between the fixed mounting assembly (9) and the first extension section (1) or the second extension section (2). A locking hole is provided between the fixed mounting assembly (9) and the first extension section (1) or the second extension section (2). A quick release pin (13) is inserted into the locking hole to lock the position of the first extension section (1) or the second extension section (2).

6. The extension section device for container loading according to claim 1, characterized in that, An anti-slip assembly (7) is embedded in the rear section of the extension section base plate (11). The anti-slip assembly (7) includes an anti-slip locking arm (17). The anti-slip locking arm (17) has an upright state that extends out of the upper surface of the extension section base plate (11) and a collapsed state that retracts into the extension section base plate (11).

7. The extension device for container loading according to claim 6, characterized in that, The anti-slip assembly (7) also includes a housing (19), a spring (18), a pin (20), and a pedal (21); the housing (19) is fixed inside the extension section base plate (11), the anti-slip locking arm (17) is located at the upper opening of the housing (19), the spring (18) abuts against the lower part of the anti-slip locking arm (17), the pin (20) is transversely inserted through the side of the anti-slip locking arm (17), and the pedal (21) is arranged adjacent to the anti-slip locking arm (17). The pedal (21) is mechanically linked to the pin (20).

8. The extension section device for container loading according to claim 1, characterized in that, The quick-release connector assembly (15) includes a half connector (22) and a twist plate (23). The half connector (22) is a rod structure. The twist plate (23) is installed on the top end face of the half connector (22). A T-shaped block is provided at the bottom of the half connector (22). The twist plate (23) has an indicator arrow. The direction of the indicator arrow has an angular correspondence with the direction of the T-shaped block.

9. The extension section device for container loading according to claim 1, characterized in that, The first extension section (1) and the second extension section (2) are symmetrical on the left and right. The bottom plane of the fixed mounting component (9) and the base component (5) is set to fit the upper surface of the external slide rail (16).

10. A method of operation for an extension device for container loading according to any one of claims 1-9, characterized in that, Includes the following processes: Place the fixed mounting assembly (9) and the base assembly (5) on the external slide rail (16); Operate the quick-release connector assembly (15) so that the lower end of the quick-release connector assembly (15) is inserted into the inner groove of the outer slide rail (16) and rotated to lock it, thus completing the fixing of the mounting assembly (9) and the base assembly (5); Force is applied to the first extension section (1) and the second extension section (2) to cause the first extension section (1) and the second extension section (2) to flip downward relative to the fixed mounting base (14) from the vertical storage state to the horizontal unfolded state; When the first extension section (1) and the second extension section (2) are in a horizontally unfolded state, the bottom plate (11) of the extension section extends outward; The goods are loaded or unloaded by moving on the intermediate roller (4) and the edge roller (3); After the task is completed, flip the first extension section (1) and the second extension section (2) upwards to a vertical storage state.

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