Anti-displacement limiting device for goods in air freight board box

Abstract

The invention provides an anti-displacement limiting device for goods in an air freight board box, and relates to the field of air freight equipment. Limiting sliding blocks are slidably connected to the upper end face, the front inner wall and the rear inner wall of the bottom of the plate box body, rotating clamping blocks are rotatably connected into the top end faces of the limiting sliding blocks sliding on the upper end face of the bottom of the plate box body, limiting stop rods are in threaded connection with the tops of the limiting sliding blocks, and telescopic screw rods are in threaded connection with the tops of the limiting stop rods. And limiting pull ropes are fixedly connected between the adjacent limiting sliding blocks and the limiting stop rods, and limiting cross rods are slidably connected to the left inner wall and the right inner wall of the plate box body and are in threaded connection with the limiting sliding blocks. Through cooperation of the latticed T-shaped groove limiting sliding rails and the limiting sliding blocks of the plate box body, the adaptability of the device to goods of different sizes and shapes is greatly improved, it is ensured that the sliding process is stable and does not derail through the T-shaped groove structures, and the problems that the adaptability is poor, the goods are prone to loosening and damage, and all-directional stable limiting is difficult are solved.

Description

Technical Field

[0001] This invention relates to the field of air cargo equipment technology, and in particular to a cargo anti-displacement limiting device inside an air cargo pallet or container. Background Technology

[0002] Air freight is characterized by its high speed and timeliness, and is widely used for transporting high-value and urgent materials. Air freight pallets and containers are the core equipment for carrying cargo, and the stability of the cargo inside directly affects transportation safety. Takeoff and landing impacts and turbulence during flight can easily cause cargo to shift or collide, which may not only cause damage to the cargo, but also affect flight safety in severe cases due to the shift of the cargo's center of gravity.

[0003] Existing anti-displacement devices for cargo inside air cargo pallets and containers have several drawbacks in practical applications. They are difficult to adapt to the limiting requirements of cargo of different specifications and shapes. The limiting components are prone to detachment or jamming during sliding. Assembly requires additional fasteners, making the operation complex. The initial limiting structure is prone to displacement under transport vibration. The positioning adjustment flexibility and stability of the limiting components are insufficient. The fixing structure is prone to loosening due to transport impact. There is a lack of an effective overall restraint mechanism to resist the inertial impact of the cargo, and it is easy to cause local squeezing damage to the cargo surface. The vertical limiting structure has poor disassembly and assembly convenience and connection stability. The height adjustment accuracy is insufficient. The position of the top limiting point is difficult to adjust flexibly, which can easily lead to uneven stress on the cargo. At the same time, there is a lack of targeted protective structures to mitigate the impact of vibration. The overall rigidity and guidance of the vertical limiting system are insufficient, making it difficult to achieve stable limiting of cargo in all directions. Summary of the Invention

[0004] This invention relates to a cargo anti-displacement limiting device inside an air cargo pallet. Through the cooperation of a grid-like T-slot limiting rail and a limiting slider on the pallet body, the device significantly improves its adaptability to cargo of different sizes and shapes. The T-slot structure ensures stable sliding without derailment. Simultaneously, the plug-in design of the limiting baffle and limiting slot allows for quick initial lateral limiting of the cargo without additional fasteners, simplifying the loading and unloading process while effectively preventing baffle displacement caused by transportation vibrations. This lays a solid foundation for subsequent three-dimensional omnidirectional limiting, balancing the device's versatility, structural stability, and ease of operation.

[0005] This invention provides a cargo anti-displacement limiting device inside an air cargo pallet, specifically comprising: a pallet body; limiting baffles inserted into the left and right sides of the pallet body; limiting sliders slidably connected to the bottom upper surface and the front and rear inner walls of the pallet body; a rotating block rotatably connected to the top end face of the limiting slider sliding on the bottom upper surface of the pallet body; a limiting stop rod threadedly connected to the top of the limiting slider; a telescopic screw threadedly connected to the top of the limiting stop rod; a plug-in top rod inserted into the top of the telescopic screw; limiting pull ropes fixedly connected between adjacent limiting sliders and limiting stops; and limiting crossbars threadedly connected between the limiting blocks on the left and right inner walls of the pallet body.

[0006] Furthermore, the plate box body is a rectangular frame structure with an open top. Limiting slide rails are provided on the front and rear inner walls and the upper bottom surface of the plate box body. The limiting slide rails are "T"-shaped groove slide rails, and the limiting slide rails are distributed in a grid pattern by crisscrossing each other.

[0007] Furthermore, the front and rear interiors and the left and right sides of the bottom upper surface of the plate box body are symmetrically provided with recessed limiting slots, and the left and right side walls and bottom of the limiting baffle are inserted into the limiting baffle.

[0008] Furthermore, the limiting slider is square in shape and has sliding feet fixedly installed at the four corners of the bottom end face. The sliding feet are slidably connected to the limiting slide rails on the inner side wall of the plate box body and are located at the intersection of the limiting slide rails. Limit bolt holes are opened in the middle of the four sides of the top end face of the limiting slider, and limit bolts are threaded into the limit bolt holes. A rotating hole is opened in the middle of the top end face of the limiting slider.

[0009] Furthermore, the bottom of the limiting bolt is connected to the limiting slide rail of the plate box body, and the top of the limiting bolt is symmetrically provided with connecting fins. The connecting fins have round holes. The top connecting fins of the limiting bolts on the same side of the adjacent limiting sliders are connected with limiting pull ropes, and the limiting pull ropes are arranged in a cross shape.

[0010] Furthermore, a rotating shaft is fixedly installed in the middle of the bottom end face of the rotating block. The rotating shaft is rotatably connected to the rotating hole opened in the top end face of the limiting slider. Four semi-annular arc-shaped limiting rods are installed at equal intervals on the outer side wall of the rotating block. The arc-shaped limiting rods are inserted into the circular holes of the connecting fin plate facing the top of the limiting bolt. A threaded connection groove is opened in the top end face of the rotating block.

[0011] Furthermore, the bottom connecting post of the limiting stop bar is connected clockwise to the threaded connecting groove opened on the top of the rotating block. An annular connecting lug is provided on the opposite side at the middle of adjacent limiting stops bars. A limiting pull rope is connected to the connecting lug. A telescopic screw groove is opened in the top end face of the limiting stop bar. A telescopic screw rod is connected clockwise in the telescopic screw groove. A plug-in rod is fixedly installed on the hexagonal nut at the top of the telescopic screw rod. A plug-in top rod is inserted into the top of the plug-in rod.

[0012] Furthermore, the front and rear ends of the limiting crossbar are connected clockwise to the end face connecting groove of the rotating card block connected to the limiting slider on the left and right inner walls of the plate box body, and the connecting ring at the top of the insert rod is slidably connected to the limiting crossbar.

[0013] This invention provides a cargo anti-displacement limiting device inside an air cargo pallet, which has the following beneficial effects: 1. By combining the grid-like T-slot limiting slide rail and the limiting slider on the plate box body, the adaptability of the device to goods of different sizes and shapes is greatly improved. The T-slot structure ensures stable sliding without derailment. At the same time, the plug-in design of the limiting baffle and the limiting slot can quickly complete the initial limiting of the goods in the left and right directions without the need for additional fasteners. This simplifies the loading and unloading process and effectively avoids the displacement of the baffle caused by transportation vibration. It lays a solid foundation for subsequent three-dimensional all-round limiting and takes into account the versatility, structural stability and ease of operation of the device.

[0014] 2. By adapting the four sliding feet of the limit slider to the grid-like slide rail, the limit slider achieves stable multi-directional positioning and adjustment. The limit bolts not only quickly lock the slider position, but also provide a fulcrum for the cross-set limit ropes through the connecting fins, forming an overall tension constraint to resist the impact inertia of cargo transportation. The flexible ropes can also adapt to the contour of the cargo to avoid local damage. The arc-shaped limit rod of the rotating block realizes secondary anti-loosening of the limit bolts, and its threaded connection groove ensures the connection accuracy of the vertical limit components, significantly enhancing the reliability, integrity and anti-loosening ability of the lateral and longitudinal limits.

[0015] 3. The threaded engagement between the limit stop and the rotating block enables convenient disassembly and self-locking to prevent loosening. Adjacent stops are linked by a pull rope to enhance the overall vertical limiting stability. The threaded engagement between the telescopic screw and the limit stop allows for precise adjustment of the vertical height. The buffer structure of the plug-in top rod absorbs vibration and prevents hard contact that could damage the cargo. The limiting crossbar forms a lateral support frame to enhance system rigidity. The plug-in top rod slides along the crossbar to flexibly adjust the top clamping point, achieving uniform clamping and guiding to prevent deviation. Ultimately, this achieves precise adaptation, stability, reliability, and safety protection for vertical and top limiting, fully meeting the limiting requirements of air cargo. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0017] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the left front side axis of the cargo anti-displacement limiting device inside the air cargo pallet according to an embodiment of the present invention.

[0019] Figure 2 This is an axial top view of the anti-displacement limiting device for cargo inside an air cargo pallet according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the disassembled structure of the cargo anti-displacement limiting device inside the air cargo pallet according to an embodiment of the present invention, consisting of the pallet body and the limiting baffle.

[0021] Figure 4 This is a schematic diagram of the structure of the cargo anti-displacement limiting device inside the air cargo pallet according to an embodiment of the present invention, showing the removal of the pallet body and the limiting baffle.

[0022] Figure 5 This is a schematic diagram showing the disassembled structure of the telescopic screw, plug-in rod, plug-in top rod, and limit crossbar of the cargo anti-displacement limiting device inside the air cargo pallet of an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram showing the disassembled structure of the limit slider, limit bolt, rotating block, and limit stop bar of the cargo anti-displacement limiting device inside the air cargo pallet of an embodiment of the present invention.

[0024] Figure 7 This is a cross-sectional structural diagram of the cargo anti-displacement limiting device inside the air cargo pallet according to an embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram showing the disassembled structure of the limit slider, limit bolt, and rotating block of the cargo anti-displacement limiting device inside the air cargo pallet of an embodiment of the present invention.

[0026] List of reference numerals 1. Panel box body; 101. Limiting slide rail; 102. Limiting slot; 2. Limiting baffle; 3. Limiting slider; 301. Sliding support foot; 302. Limiting bolt hole; 303. Rotating hole; 4. Limiting bolt; 401. Connecting fin plate; 5. Rotating block; 501. Rotating shaft; 502. Arc-shaped limiting rod; 503. Connecting groove; 6. Limiting stop bar; 601. Connecting column; 602. Connecting lug; 603. Telescopic screw groove; 7. Telescopic screw; 701. Inserting rod; 8. Inserting top rod; 801. Connecting hanging ring; 9. Limiting crossbar; 901. Connecting head; 10. Limiting pull rope. Detailed Implementation

[0027] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0028] Example 1: Please refer to Figures 1 to 8 As shown: This invention provides a cargo anti-displacement limiting device inside an air cargo pallet, comprising a pallet body 1, limiting baffles 2 inserted into the left and right sides of the pallet body 1, limiting sliders 3 slidably connected to the bottom upper surface and the front and rear inner walls of the pallet body 1, a rotating block 5 rotatably connected to the top end of the limiting slider 3 slidably on the bottom upper surface of the pallet body 1, a limiting stop bar 6 threadedly connected to the top of the limiting slider 3, a telescopic screw 7 threadedly connected to the top of the limiting stop bar 6, a plug-in top rod 8 inserted into the top of the telescopic screw 7, limiting pull ropes 10 fixedly connected between adjacent limiting sliders 3 and limiting stop bars 6, and limiting crossbars 9 threadedly connected between the limiting blocks on the left and right inner walls of the pallet body 1.

[0029] The main body 1 is a rectangular frame structure with an open top. Limiting slide rails 101 are provided on the front and rear inner walls and the upper bottom surface of the main body 1. The limiting slide rails 101 are T-shaped groove slide rails. The limiting slide rails 101 are arranged in a grid pattern, so the limiting slider 3 can move flexibly along the crisscrossing T-shaped groove slide rails. It can adapt to the limiting requirements of goods of different sizes and shapes. The T-shaped groove structure can prevent the sliding support 301 from falling off the slide rail, ensuring the structural stability during the sliding process. At the same time, the grid pattern makes the positioning position of the limiting slider 3 more varied, improving the versatility of the device.

[0030] The front and rear interiors of the box body 1, as well as the left and right sides of the bottom upper surface, are symmetrically provided with recessed limiting slots 102. The left and right side walls and bottom of the limiting baffle 2 are inserted into the limiting baffle 2. Therefore, the limiting baffle 2 can be quickly assembled by plugging in without additional fasteners, simplifying loading and unloading operations. The recessed limiting slots 102 can form circumferential constraints on the limiting baffle 2, preventing the baffle from shifting due to vibration during transportation. At the same time, the symmetrically arranged baffles can form preliminary limiting of the goods from the left and right sides, laying the foundation for subsequent three-dimensional fixing.

[0031] By adopting the above technical solution, the limit slider 3 can be flexibly positioned in multiple directions through the grid-shaped T-slot limit slide rail 101, which can adapt to the limit requirements of goods of different specifications. At the same time, with the help of the plug-in limit baffle 2 and the limit slot 102, the initial constraint of the goods in the left and right directions can be quickly completed. This not only ensures the versatility and structural stability of the plate box body 1, but also simplifies the initial assembly operation and provides a reliable foundation for subsequent all-round limit.

[0032] The limiting slider 3 is square in shape and has sliding feet 301 fixedly installed at the four corners of its bottom end face. The sliding feet 301 are slidably connected to the limiting slide rails 101 on the inner side wall of the plate box body 1 and are located at the intersection of the limiting slide rails 101. Limiting bolt holes 302 are opened in the middle of the four sides of the top end face of the limiting slider 3. Limiting bolts 4 are threadedly connected in the limiting bolt holes 302. A rotating hole 303 is opened in the middle of the top end face of the limiting slider 3. Therefore, the sliding feet 301 at the four corners of the bottom of the limiting slider 3 make the limiting slider 3 bear the force evenly, and the sliding process is smooth and without jamming. It can adapt to the intersection of the grid-like slide rails to achieve multi-directional positioning. The cooperation between the limiting bolt holes 302 and the limiting bolts 4 can quickly lock the slider position. The operation is convenient and the fixation is reliable. The rotating hole 303 provides a precise rotation installation reference for the rotating block 5, ensuring the coaxiality of the subsequent component assembly and improving the connection accuracy of the overall structure.

[0033] The bottom of the limiting bolt 4 is connected to the limiting slide rail 101 of the plate box body 1. The top of the limiting bolt 4 is symmetrically provided with connecting fins 401, and the connecting fins 401 have round holes. The connecting fins 401 on the same side of the limiting bolt 4 of the adjacent limiting slider 3 are connected with limiting pull ropes 10. The limiting pull ropes 10 are arranged in a cross shape. Therefore, the limiting bolt 4 not only fixes the limiting slider 3 to the slide rail, but also provides an installation fulcrum for the limiting pull ropes 10 through the connecting fins 401. The cross-arranged pull ropes form a lateral or longitudinal tension constraint, which can offset the impact inertia during the transportation of goods and prevent the individual limiting slider 3 from loosening and shifting. At the same time, the flexible constraint of the pull rope can adapt to the surface contour of the goods, avoid excessive local pressure and damage to the goods, and improve the overall performance and buffering effect of the limiting system.

[0034] The rotating block 5 has a rotating shaft 501 fixedly installed in the middle of its bottom end face. The rotating shaft 501 is rotatably connected to the rotating hole 303 on the top end face of the limiting slider 3. Four semi-annular arc-shaped limiting rods 502 are installed at equal intervals on the outer side wall of the rotating block 5. The arc-shaped limiting rods 502 are inserted into the round holes of the connecting wing plate 401 facing the top of the limiting bolt 4. A threaded connection groove 503 is provided in the top end face of the rotating block 5. Therefore, the cooperation between the rotating shaft 501 and the rotating hole 303 enables the rotating block 5 to rotate flexibly. The four arc-shaped limiting rods 502 can be selectively inserted into the round holes of the connecting wing plate 401 through the rotation of the rotating block 5, realizing the secondary locking of the limiting bolt 4 and preventing the threaded connection from loosening. At the same time, the threaded connection groove 503 provides a firm threaded connection interface for the limiting stop rod 6, ensuring the installation stability of the vertical limiting component and avoiding vertical limiting failure.

[0035] By adopting the above technical solution, the four sliding feet 301 of the limiting slider 3 cooperate with the grid-shaped limiting slide rail 101 to achieve stable and multi-directional positioning adjustment of the limiting slider 3. The limiting bolt 4 quickly locks the position of the limiting slider 3 and provides an installation base for the limiting pull rope 10. The cross-set limiting pull ropes 10 form an overall tension constraint to resist impact. The arc-shaped limiting rod 502 of the rotating block 5 achieves secondary anti-loosening of the limiting bolt 4. At the same time, the threaded connection groove 503 of the rotating block 5 ensures the connection accuracy and stability of the limiting stop rod 6, which significantly improves the reliability, integrity and anti-loosening ability of the lateral and longitudinal limiting.

[0036] The bottom connecting post 601 of the limit stop 6 is threaded clockwise into the threaded connecting groove 503 on the top of the rotating block 5. An annular connecting lug 602 is provided on opposite sides of the middle of adjacent limit stop 6s, and a limit pull rope 10 is connected to the connecting lug 602. A telescopic screw groove 603 is provided on the top end face of the limit stop 6, and a telescopic screw rod 7 is threaded clockwise into the telescopic screw groove 603. A plug-in rod 701 is fixedly installed on the hexagonal nut at the top of the telescopic screw rod 7, and a plug-in top rod 8 is inserted into the top of the plug-in rod 701. Therefore... The clockwise threaded connection makes the installation and disassembly of the limit stop 6 convenient, and the self-locking nature of the thread prevents loosening during transportation. The connecting lug 602, together with the limit pull rope 10, realizes the linkage constraint of adjacent stops, enhancing the overall integrity of the vertical limit. The threaded engagement of the telescopic screw groove 603 and the telescopic screw rod 7 allows for precise adjustment of the vertical limit height, adapting to goods of different heights. The insertion structure of the plug-in top rod 8 and the plug-in rod 701 has a certain buffer stroke, which can absorb vibration energy and avoid damage to the goods due to hard contact. At the same time, it is easy to adjust the tightening angle according to the shape of the top of the goods.

[0037] The front and rear end connectors 901 of the limiting crossbar 9 are clockwise connected to the end face connecting grooves 503 of the rotating block 5 connected to the limiting slider 3 on the left and right inner walls of the box body 1. The connecting ring 801 at the top of the insert top rod 8 is slidably connected to the limiting crossbar 9. Therefore, the limiting crossbar 9 is firmly connected to the rotating block 5 through the two end connectors 901 to form a horizontal support frame, which improves the structural rigidity of the vertical limiting system. The connecting ring 801 of the insert top rod 8 slides along the limiting crossbar 9, and the top tightening point can be flexibly adjusted according to the width of the goods to achieve uniform top pressing and avoid excessive local force on the goods. At the same time, the limiting crossbar 9 plays a guiding and limiting role for the insert top rod 8, preventing the vertical limiting component from shifting laterally and ensuring the stability and reliability of the top limiting.

[0038] Using the above technical solution, the connecting post 601 of the limit stop bar 6 and the threaded connecting groove 503 of the rotating block 5 are engaged clockwise to achieve convenient disassembly and assembly and prevent loosening during transportation. Adjacent limit stop bars 6 are linked with the limit pull rope 10 through the connecting lug 602 to improve the overall vertical limit. The telescopic screw groove 603 is threaded with the telescopic screw 7 to accurately adjust the vertical height to adapt to different goods. The insertion structure of the plug rod 701 and the plug top rod 8 provides a buffer stroke to absorb vibration, avoid hard damage to goods, and adjust the tightening angle. The limit crossbar 9 is fixed to the rotating block 5 through the connector 901 to form a horizontal support frame to improve the rigidity of the system. The connecting ring 801 slides along the limit crossbar 9 to adjust the top tightening point to achieve uniform pressing. At the same time, the limit crossbar 9 guides and prevents deviation, ultimately ensuring the reliability, safety and adaptability of the vertical and top limits.

[0039] The specific usage and function of this embodiment: In this invention, the goods to be transported are first placed stably at the center of the bottom of the pallet box body 1. Then, along the T-shaped groove limiting slide rails 101 crisscrossing on the pallet box body 1, the limiting sliders 3 on the bottom and front and rear inner walls of the pallet box body 1 are slid to the appropriate position around the goods. The position of the limiting sliders 3 is locked by tightening the limiting bolts 4 in the limiting bolt holes 302. Then, the rotating block 5 at the top of the limiting sliders 3 is rotated so that the arc-shaped limiting rod 502 is inserted into the round hole of the connecting fin plate 401 at the top of the limiting bolt 4, realizing the secondary anti-loosening fixation of the limiting bolt 4. After that, the limiting stop rod 6 is threaded to the threaded connecting groove 503 of the rotating block 5 through the bottom connecting post 601. The telescopic screw 7 is adjusted clockwise according to the height of the goods. The extension length within the constriction groove 603 allows the insertion top rod 8 to fit against the side of the cargo. Simultaneously, cross-shaped limiting pull ropes 10 are connected to the connecting fins 401 of the adjacent limiting slider 3 and the connecting lugs 602 of the adjacent limiting stop rod 6, forming a linkage tension constraint in the horizontal and vertical directions. Finally, the limiting cross rod 9 is threaded to the rotating blocks 5 of the limiting slider 3 on the left and right inner walls of the pallet body 1 through the connecting heads 901 at both ends. The connecting ring 801 at the top of the sliding insertion top rod 8 is moved to the corresponding pressing position on the top of the cargo, completing the three-dimensional wrapping and limiting fixation of the cargo in the horizontal, vertical and vertical directions, ensuring that there is no risk of cargo displacement during transportation. Finally, the limiting stop plate 2 is inserted into the limiting slots 102 on the front and rear interior and the left and right sides of the bottom of the pallet body 1 to complete the left and right direction limiting of the cargo.

[0040] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. A cargo anti-displacement limiting device inside an air cargo pallet, characterized in that, The system includes a plate box body (1); limit baffles (2) are inserted into the left and right sides of the plate box body (1); limit sliders (3) are slidably connected to the bottom upper surface and the front and rear inner walls of the plate box body (1); a rotating block (5) is rotatably connected to the top end of the limit slider (3) that slides on the bottom upper surface of the plate box body (1); a limit stop (6) is threadedly connected to the top of the limit slider (3); a telescopic screw (7) is threadedly connected to the top of the limit stop (6); a plug-in top rod (8) is inserted into the top of the telescopic screw (7); a limit pull rope (10) is fixedly connected between adjacent limit sliders (3) and limit stop (6); and a limit crossbar (9) is threadedly connected between the limit sliders on the left and right inner walls of the plate box body (1).

2. The cargo anti-displacement limiting device inside an air cargo pallet as described in claim 1, characterized in that, The plate box body (1) is a rectangular frame structure with an open top. Limiting slide rails (101) are provided on the front and rear inner walls and the upper bottom surface of the plate box body (1). The limiting slide rails (101) are "T"-shaped groove slide rails. The limiting slide rails (101) are arranged in a grid pattern.

3. The cargo anti-displacement limiting device inside an air cargo pallet as described in claim 1, characterized in that, The front and rear interiors and the left and right sides of the bottom upper surface of the plate box body (1) are symmetrically provided with recessed limiting slots (102), and the left and right side walls and bottom of the limiting baffle (2) are inserted into the limiting baffle (2).

4. The cargo anti-displacement limiting device inside an air cargo pallet as described in claim 1, characterized in that, The limiting slider (3) is square in shape and has sliding feet (301) fixedly installed at the four corners of the bottom end face. The sliding feet (301) are slidably connected to the limiting slide rail (101) on the inner side wall of the plate box body (1) and located at the intersection of the limiting slide rail (101). Limiting bolt holes (302) are opened in the middle of the four sides of the top end face of the limiting slider (3). Limiting bolts (4) are threaded in the limiting bolt holes (302). A rotating hole (303) is opened in the middle of the top end face of the limiting slider (3).

5. The cargo anti-displacement limiting device inside an air cargo pallet as described in claim 4, characterized in that, The bottom of the limiting bolt (4) is connected to the limiting slide rail (101) of the plate box body (1). The top of the limiting bolt (4) is symmetrically provided with connecting fins (401). The connecting fins (401) have round holes. The top connecting fins (401) of the limiting bolts (4) on the same side of the adjacent limiting sliders (3) are connected with limiting pull ropes (10). The limiting pull ropes (10) are arranged in a cross shape.

6. The cargo anti-displacement limiting device inside an air cargo pallet as described in claim 1, characterized in that, A rotating shaft (501) is fixedly installed in the middle of the bottom end face of the rotating block (5). The rotating shaft (501) is rotatably connected to the rotating hole (303) opened on the top end face of the limiting slider (3). Four semi-circular arc-shaped limiting rods (502) are installed at equal intervals on the outer side wall of the rotating block (5). The arc-shaped limiting rods (502) are inserted into the round hole of the connecting wing plate (401) of the limiting bolt (4) facing the rotating block (5). A threaded connection groove (503) is opened in the top end face of the rotating block (5).

7. The cargo anti-displacement limiting device inside an air cargo pallet as described in claim 1, characterized in that, The bottom connecting post (601) of the limiting stop (6) is connected clockwise to the threaded connecting groove (503) opened on the top of the rotating block (5). An annular connecting lug (602) is provided on the opposite side of the middle of the adjacent limiting stop (6). A limiting pull rope (10) is connected to the connecting lug (602). A telescopic screw groove (603) is opened in the top end face of the limiting stop (6). A telescopic screw rod (7) is connected clockwise in the telescopic screw groove (603). A plug-in rod (701) is fixedly installed on the hexagonal nut at the top of the telescopic screw rod (7). A plug-in top rod (8) is inserted into the top of the plug-in rod (701).

8. The cargo anti-displacement limiting device inside an air cargo pallet as described in claim 1, characterized in that, The front and rear ends of the limiting crossbar (9) are connected clockwise to the end face connecting groove (503) of the rotating block (5) connected to the limiting slider (3) on the left and right inner walls of the plate box body (1), and the connecting ring (801) at the top of the insert rod (8) is slidably connected to the limiting crossbar (9).

Images