An inner village board for a logistics trolley and its application

Abstract

The present invention relates to an inner panel for a logistics vehicle and its application. The panel comprises a box-shaped outer shell constructed from joined shell panels. Within the outer shell are disposed a plurality of multifunctional modules, each comprising four square modules, two adjacent modules arranged axially symmetrically, each module comprising two rectangular modules. The outer shell is also filled with a gel medium. The inner panel for a logistics vehicle can be used as an inner lining for a logistics vehicle or packaging box. It exhibits high compressive strength, strong impact resistance, and high impact strength, making it highly suitable for the logistics vehicle industry. It can be produced in a standardized manner and can be assembled for ease of use.

Description

Technical Field

[0001] The present invention relates to an inner village plate for a logistics trolley and application thereof, belonging to the technical field of logistics trolley accessories. Background Art

[0002] Logistics refers to the entire process of planning, implementing, and managing the movement of raw materials, semi-finished products, finished products, and related information from their point of origin to their point of consumption through transportation, storage, and distribution to meet customer needs. Logistics is a system that controls the physical movement of raw materials, finished goods, and information from supply through various intermediate links, transfer, and ownership, to the final consumer, thereby achieving the organization's stated goals.

[0003] In the modern logistics system, logistics carts are needed in the transportation, warehousing, packaging, handling and loading and unloading, circulation processing, distribution and related logistics information of objects.

[0004] In the field of logistics vehicles, the current inner lining boards are usually foam boards, rubber boards, corrugated boards, etc. The inner lining boards can usually be installed on the inside of the logistics vehicle compartment or used for packaging boxes. They are widely used in the field of logistics vehicles.

[0005] Corrugated board (also called hollow lattice board, Wantong board, double-wall board) is a light weight (hollow structure), non-toxic, pollution-free, waterproof, shockproof, anti-aging and corrosion-resistant material, which is often used in the field of logistics vehicle accessories.

[0006] However, the existing corrugated board has insufficient compressive strength, especially limited impact resistance and impact strength, and its effect is limited when used in the field of logistics carts; because logistics carts often bump into each other during long-term use, if the impact resistance and impact strength of the lining board cannot be further improved, it needs to be replaced frequently, otherwise it will not meet the use requirements.

[0007] Based on this, the present invention is proposed. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the present invention provides an inner village plate for a logistics trolley and its application. The specific technical solution is as follows:

[0009] A liner for a logistics trolley comprises a box-shaped outer shell, the outer shell being made by splicing shell plates. A plurality of multifunctional module sets are arranged inside the outer shell, the multifunctional module sets comprising four square module combinations, two adjacent module combinations being arranged axially symmetrically, and the module combinations comprising two rectangular module units; the interior of the outer shell is also filled with a gel medium.

[0010] For further optimization of the above technical solution, the module unit includes two side plates and a bottom plate for connecting the upper and lower ends of the side plates. A functional cavity is provided between the two side plates and the two bottom plates, and two winding rods are arranged inside the functional cavity; the winding rod includes a counterweight rod, and a winding layer is wound around the outside of the winding rod. The cross-section of the winding layer is a spiral structure, and a spiral gap channel is arranged inside the winding layer. The starting end of the winding layer is fixedly connected to the counterweight rod, the ending end and the outside of the winding layer are fixedly connected to the bottom plate, and a wrinkled part is arranged in the middle section of the bottom plate.

[0011] For further optimization of the above technical solution, in the module combination, the winding directions of the winding layers in two adjacent winding rods are set to be opposite; in the module combination, three winding rods form a U-shaped winding rod combination one, and a U-shaped flow channel is formed between four winding rods.

[0012] For further optimization of the above technical solution, in the multi-functional module set, four winding rod combinations one form a ring-shaped winding rod set, and the four sides of the winding rod set are all serrated; a cross-shaped winding rod combination two formed by the remaining four winding rods is arranged in the center of the multi-functional module set.

[0013] For further optimization of the above technical solution, in the multi-functional module set, the winding directions of the winding layers in two adjacent module units are set to be opposite.

[0014] For further optimization of the above technical solution, in the module unit, the ratio of the projected area of the two winding rods at the bottom plate to the area of the bottom plate is x, and 0.5 ≤ x ≤ 0.8.

[0015] For further optimization of the above technical solution, the outer shell is made of a metal plate, a plastic plate or a rubber plate, the bottom plate and the side plates are both made of a plastic plate or a rubber plate, the winding layer is made of a plastic plate, and the counterweight rod is made of a lead rod.

[0016]

[0017] ​40 parts by mass of sodium carboxymethyl cellulose and 5000-6000 parts by mass (preferably 5300 parts by mass) of water are mixed to prepare a sodium carboxymethyl cellulose solution, 200-230 parts by mass (preferably 210 parts by mass) of acrylic acid with a neutralization degree of 60% and 80-100 parts by mass (preferably 85 parts by mass) of acrylamide are added to the sodium carboxymethyl cellulose solution in sequence and reacted for 1-5 hours to obtain a primary cross-linking solution; 30-50 parts by mass (preferably 37 parts by mass) of cattail are added to the primary cross-linking solution and dispersed in a disperser for 30-50 minutes. n, then add 2.2 parts by mass (preferably 2.1 parts by mass) of sodium persulfate, 0.9-1 parts by mass (preferably 0.9 parts by mass) of N,N'-methylenebisacrylamide, and 50-60 parts by mass (preferably 53 parts by mass) of sodium bicarbonate, and disperse for 1-2 hours to obtain a colloid; 10 parts by mass of the colloid, 200-230 parts by mass (preferably 220 parts by mass) of cattail, 20 parts by mass of sodium chloride, 9 parts by mass of sodium pyrophosphate, and 3000 parts by mass of water, and stir and mix for 30-50 minutes to prepare a gel medium.

[0018] Further optimization of the above technical solution, the preparation method of cattail wool is as follows:

[0019] The long-bracted cattail is trimmed, and the yellow-green or yellow-brown candle-shaped stem in the middle is taken out and sun-dried to obtain a dried cattail column, wherein the moisture content of the dried cattail column is less than 3%;

[0020] The surface of the dry cattail column is rubbed, the fluff rubbed off is collected, the clumped fluff is removed, and the remaining fluff is the pre-selected cattail fluff;

[0021] The preselected cattail fluff is soaked in a sodium chloride solution with a mass fraction of 1.1% for 24 to 36 hours and then sun-dried to obtain the cattail fluff, wherein the moisture content of the cattail fluff is less than 3%.

[0022] A further optimization of the above technical solution is the application of the inner village panel for the logistics trolley in the carriage of the logistics trolley.

[0023] Beneficial effects of the present invention:

[0024] The inner village board for logistics trolleys can be used in the inner lining board or packaging box of logistics trolleys. It has high compressive strength, especially strong impact resistance and impact resistance, and is very suitable for the field of logistics trolleys. It can be produced in a standardized manner and can be assembled when used, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of the inner village plate for the logistics trolley of the present invention;

[0026] Figure 2 This is a schematic diagram of the distribution of two winding rods in the module unit of the present invention;

[0027] Figure 3 This is a schematic structural diagram of the module combination of the present invention;

[0028] Figure 4 This is a schematic structural diagram of the multifunctional module assembly of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the control module combination 1 described in Experimental Example 1;

[0030] Figure 6 This is a schematic structural diagram of the control module combination 2 described in Experimental Example 2;

[0031] Figure 7 It is a curve graph between x value and impact resistance z. Implementation Method

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example 1

[0033] like Figure 1 、 3 As shown in Figure 4, the inner village panel of the logistics trolley includes a box-shaped outer shell 10, which is made of shell plates. A plurality of multifunctional module sets 50 are arranged inside the outer shell 10, and the multifunctional module sets 50 include four square module combinations 40. Two adjacent module combinations 40 are arranged in an axially symmetrical manner. The module combination 40 includes two rectangular module units 20; the interior of the outer shell 10 is also filled with a gel medium.

[0034] The module assembly 40 is also arranged symmetrically along the diagonal axis.

[0035] The housing 10 is made of metal, plastic, or rubber. Depending on the application scenario, different materials are selected. For example, if the inner panel for a logistics vehicle is used in a vehicle compartment, a metal plate (such as a galvanized iron plate or an aluminum alloy plate) is preferably used.

[0036] If the inner village board for the logistics trolley is used for packaging boxes in the logistics field, it is preferably made of plastic board or rubber board, and plastic or rubber is selected according to different pressure resistance requirements.

[0037] The bottom plate 21 and the side plates 23 are both made of plastic plates or rubber plates, the winding layer 32 is made of plastic plates, and the counterweight rod 31 is made of a lead rod. Example 2

[0038] Based on Example 1, Figure 2 As shown, the module unit 20 includes two side plates 23 and a bottom plate 21 for connecting the upper and lower ends of the side plates 23. A functional cavity 22 is provided between the two side plates 23 and the two bottom plates 21, and two winding rods 30 are provided inside the functional cavity 22; the winding rod 30 includes a counterweight rod 31, and a winding layer 32 is wound around the outside of the winding rod 30. The cross-section of the winding layer 32 is a spiral structure, and a spiral gap channel 321 is provided inside the winding layer 32. The starting end of the winding layer 32 is fixedly connected to the counterweight rod 31, the ending end and the outside of the winding layer 32 are fixedly connected to the bottom plate 21, and a wrinkled portion 211 is provided in the middle section of the bottom plate 21.

[0039] First, the presence of the winding rod 30 is equivalent to the function of the corrugated core board in the corrugated board, mainly playing the role of shockproof and buffering. However, the current corrugated board has a poor anti-hammering effect.

[0040] Second, in the present invention, due to the presence of the winding layer 32 in the winding rod 30, its shockproof and buffering effects are better than those of the corrugated core board.

[0041] Finally, the setting of the wrinkled portion 211 enables the bottom plate 21 to have a certain stretching and shrinking ability, which provides buffering for the anti-hammering and anti-impact deformation of the inner lining board for the logistics trolley itself.

[0042] The gel medium itself has a certain blocking effect. It is filled in the functional cavity 22, and ultrasonic vibration can be used to make the filling more sufficient; the gel medium will also fill the gap channel 321. The special structure (spiral structure) of the winding layer 32 makes the blocking effect add up when the bottom plate 21 is subjected to an external impact force, so as to obtain better anti-hammering and anti-impact properties.

[0043] In addition, due to the presence of the counterweight rod 31, on the one hand, it is used as a carrier when the winding layer 32 is wound. On the other hand, it is relatively heavy, so that the gap width of the gap channel 321 corresponding to the lower half of the winding layer 32 is generally smaller than the gap width of the upper half of the gap channel 321. Therefore, the bottom plate 21 with a larger gap width can be used as the outer side surface, so that the inner lining board for the logistics trolley itself has better anti-external hammering and impact resistance.

[0044] In this embodiment, further, as Figure 2 、 3 shown, in the module combination 40, the winding directions of the winding layers 32 in two adjacent winding rods 3 are set in opposite directions; in the module combination 40, three of the winding rods 30 form a U-shaped winding rod combination 41; a U-shaped flow channel is formed between all four winding rods 30, and this U-shaped flow channel is mainly for facilitating the rapid filling of the gel medium inside the module combination 40.

[0045] The rotation direction is the rotation direction. For example, the rotation direction of the winding layer 32 in one winding rod 30 is clockwise, and the rotation direction of the winding layer 32 in the other winding rod 30 is counterclockwise.

[0046] The purpose of using opposite rotations is to improve the hammer and impact resistance of the entire module assembly 40. When the center of the module assembly 40 is struck by a hammer, the blocking gel medium will overflow in at least four directions. With the same rotation, the overflow direction is generally two, which is not conducive to improving the hammer resistance.

[0047] In this embodiment, further, as Figure 2 、 4 As shown, in the multifunctional module assembly 50, the four coil rod assemblies 1 41 form a ring-shaped coil rod assembly 51. Each of the four edges of the coil rod assembly 51 is serrated, further enhancing impact resistance over a large area. A cross-shaped coil rod assembly 2 52, formed by the remaining four coil rods 30, is positioned in the center of the multifunctional module assembly 50. This structure enhances impact resistance in the central region of the large structure.

[0048] In actual application, several multifunctional module sets 50 can be selected and assembled according to needs, which is simple and convenient to operate.

[0049] Similarly, in the multifunctional module assembly 50 , the rotation directions of the winding layers 32 in two adjacent module units 20 are opposite to each other. This is to improve the hammer and impact resistance of the entire multifunctional module assembly 50 .

[0050] In this embodiment, in the module unit 20 , the ratio of the projection area of ​​the two winding rods 30 on the bottom plate 21 to the area of ​​the bottom plate 21 is x, and 0.5≤x≤0.8.

[0051] x cannot be too large, as this not only increases costs but also reduces the space available for the gel medium, resulting in poor hammer and impact resistance. x cannot be too small, as this reduces the effectiveness of the winding rod 30, particularly the interaction between the winding rod 30 and the gel medium, which also results in poor hammer and impact resistance. Therefore, after multiple tests, we found that x is preferably 0.7. Example 3

[0052] In Example 2, the preparation method of the gel medium is as follows:

[0053] 40 kg of sodium carboxymethyl cellulose and 5300 kg of water are mixed to prepare a sodium carboxymethyl cellulose solution, and 210 kg of acrylic acid with a neutralization degree of 60% and 85 kg of acrylamide are added to the sodium carboxymethyl cellulose solution in sequence and reacted for 1 hour to obtain a primary liquid; 37 kg of cattail fluff is added to the primary liquid and dispersed in a disperser for 40 minutes, and then 2.2 kg of sodium persulfate, 0.9 kg of N,N'-methylenebisacrylamide, and 53 kg of sodium bicarbonate are added and dispersed for 1 hour to obtain a colloid; 10 kg of the colloid, 220 kg of cattail fluff, 20 kg of sodium chloride, 9 kg of sodium pyrophosphate, and 3000 kg of water are stirred and mixed for 50 minutes to prepare a gel medium.

[0054] The preparation method of cattail wool is as follows:

[0055] The long-bracted cattail is trimmed, and the yellow-green or yellow-brown candle-shaped stem in the middle is taken out and sun-dried to obtain a dried cattail column, wherein the moisture content of the dried cattail column is less than 3%;

[0056] The surface of the dry cattail column is rubbed, the fluff rubbed off is collected, the clumped fluff is removed, and the remaining fluff is the pre-selected cattail fluff;

[0057] The preselected cattail fluff is soaked in a sodium chloride solution with a mass fraction of 1.1% for 24 hours and then sun-dried to obtain the cattail fluff, wherein the moisture content of the cattail fluff is less than 3%.

[0058] Test Example 1

[0059] like Figure 5 As shown, compared to module assembly 1 40a, two winding rods 30 form a "V"-shaped winding rod assembly 3 41a; the two winding rod assemblies 41a are arranged facing each other. This example differs from Example 2 only in the arrangement of the winding rods 30 within the module assembly 40. While this arrangement improves flowability, it is less resistant to hammering and impact over a large area than Example 2.

[0060] The corresponding inner village board in this example is referred to as sample board 2.

[0061] The corresponding control module assembly 40a from sample plate 2 was selected and tested according to the "Impact Resistance Test." However, the corresponding steel strips (10 cm long, 2 cm wide; corners and edges were chamfered and rounded) achieved a final impact resistance (dynamic test) of 91 N, and an impact strength of "withstands a 100 J impact, with the dents formed recoverable." Table 1 and the test results show that for small areas (such as control module assembly 40a, 20 cm long and 20 cm wide), the impact resistance and strength of sample plate 2 are comparable to those of sample plate 1. However, for larger areas, such as multifunctional module assembly 50 (40 cm long and 40 cm wide), the impact resistance and strength decrease significantly. This indicates that the arrangement and structure of the winding rods 30 can significantly influence the impact resistance and strength.

[0062] Test Example 2

[0063] like Figure 6 As shown, in comparison with module assembly 2 40b, two winding rods 30 form a "V"-shaped winding rod assembly 41b. The two winding rod assemblies 41b are arranged opposite each other, forming a closed square frame structure. This example differs from Example 2 solely in the arrangement of the winding rods 30 within module assembly 40. This arrangement results in poorer flowability and is less resistant to hammering and impact than Example 2 on both small and large surfaces.

[0064] The corresponding inner village board in this example is referred to as sample board 3.

[0065] The corresponding control module combination 2 (40b) from Sample 3 was tested according to the "Impact Resistance Test." However, the corresponding steel strip (10 cm long, 2 cm wide; corners and edges were chamfered and rounded) produced a final impact resistance (dynamic method) of 66 N, and an impact strength rating of "unable to withstand a 100 J impact, with the dents remaining unrecoverable." Table 1 and the test results indicate that Sample 3's resistance to hammer and impact, both on small and large areas, was inferior to that of Example 2 and Test Example 2.

[0066] Test Example 3

[0067] In this example, corrugated board from Changzhou Yingren Plastic Packaging Material Co., Ltd. is used. The corrugated board is sandwiched with a steel wire mesh with a wire diameter of 8 mm, and the final product is sample board 4; the thickness of sample board 4 is the same as that of sample board 1.

[0068] Test Example 4

[0069] In this example, the corrugated board produced by Changzhou Yingren Plastic Packaging Material Co., Ltd. is selected, which is marked as sample board 5; the thickness of sample board 5 is the same as that of sample board 1.

[0070] Test Example 5

[0071] The difference between this example and Example 2 is that the winding rod 30 is not provided in this example, and the rest is the same as Example 2; the corresponding inner village board in this example is referred to as sample board 6.

[0072] Test Example 6

[0073] The difference between this example and Example 2 is that the gel medium is not filled in this example, and the rest is the same as Example 2; the corresponding inner village plate in this example is referred to as sample plate 7.

[0074] Test Example 7

[0075] The difference between this example and Example 3 is that this example uses small cattail instead of long-bract cattail, and the rest is the same as Example 3; the corresponding inner village board in this example is referred to as sample board 8.

[0076] Adjustments are made to the "Impact Resistance Test". When testing the impact resistance, the weight of the falling body consisting of steel strips and counterweights is adjusted, such as 10kg, 9kg, 8kg, 7kg, 6kg, 5kg, 4kg, 3kg, etc., and impact tests are carried out with corresponding impact energy.

[0077] Test Example 8

[0078] The difference between this example and Example 3 is that this example uses cattail sphagnum instead of cattail longifolia, and the rest is the same as Example 3; the corresponding inner village board in this example is referred to as sample board 9.

[0079] Adjustments are made to the "Impact Resistance Test". When testing the impact resistance, the weight of the falling body consisting of steel strips and counterweights is adjusted, such as 10kg, 9kg, 8kg, 7kg, 6kg, 5kg, 4kg, 3kg, etc., and impact tests are carried out with corresponding impact energy.

[0080] Test Example 9

[0081] The difference between this example and Example 3 is that cotton wool is used instead of cattail wool in this example, and the rest is the same as Example 3; the corresponding inner village board in this example is referred to as sample board 10.

[0082] Adjustments are made to the "Impact Resistance Test". When testing the impact resistance, the weight of the falling body consisting of steel strips and counterweights is adjusted, such as 10kg, 9kg, 8kg, 7kg, 6kg, 5kg, 4kg, 3kg, etc., and impact tests are carried out with corresponding impact energy.

[0083] Test Example 10

[0084] The difference between this example and Example 3 is that glass fiber is used instead of cattail wool in this example. The rest is the same as Example 3. The corresponding inner village board in this example is referred to as sample board 11.

[0085] Adjustments are made to the "Impact Resistance Test". When testing the impact resistance, the weight of the falling body consisting of steel strips and counterweights is adjusted, such as 10kg, 9kg, 8kg, 7kg, 6kg, 5kg, 4kg, 3kg, etc., and impact tests are carried out with corresponding impact energy.

[0086] Test Example 11

[0087] The difference between this example and Example 3 is that 9 kg of sodium pyrophosphate is replaced by 9 kg of sodium chloride, and the total weight of sodium chloride used is 29 kg. The rest is the same as Example 3; the corresponding inner village board in this example is referred to as sample board 12.

[0088] Test Example 12

[0089] The difference between this example and Example 3 is that the preselected cattail fluff is soaked in clean water for 24 hours and then dried in the sun instead of using a 1.1% sodium chloride solution. The rest is the same as Example 3. The corresponding inner village board in this example is referred to as sample board 13.

[0090] The inner panel for the logistics vehicle described in Example 3 is referred to as Sample Panel 1. Sample Panels 1 and 1 were tested according to the "Impact Resistance Test," with the results shown in Table 1. For all sample panels, the corresponding outer shell 10 was made of a plastic sheet (polypropylene), the bottom panel 21 and side panels 23 were made of a plastic sheet (polypropylene), and the wrapping layer 32 was made of a plastic sheet (polypropylene).

[0091]

[0092] Test Example 13

[0093] In Example 2, x varies in the range of 0.2 to 0.9, and the corresponding sample plate is tested according to the "Impact Test", and the corresponding impact force (dynamic method) is z. Figure 7 It can be seen that x is preferably 0.7.

[0094] In the above embodiment, the steps of the "impact test" are as follows:

[0095] The impact resistance test of a sample plate (50cm long, 50cm wide) was conducted in accordance with the GA68-2019 standard for "Police Anti-Stab Clothing." A vertical steel strip (30cm long, 2cm wide; corners and edges were chamfered and rounded) was tested on a universal testing machine. The steel strip was lowered at a rate of 100mm / min, with a displacement of 20mm. The impact force was measured at the first peak of the downward movement. Furthermore, the steel strip (30cm long, 2cm wide) was tested by an external inspection agency in accordance with the test method in GA68-2019 for "Police Anti-Stab Clothing." At room temperature, the steel strip was weighted to form a 10kg drop, with an impact energy of 100J±1J.

[0096] The standard for judging whether it is impact-resistant: if the maximum depth of the dent produced by the steel strip after impact is greater than or equal to half of the thickness of the sample plate after 5 minutes of recovery, it is judged to be not impact-resistant and cannot be restored.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An inner panel for a logistics vehicle, comprising a box-shaped outer shell (10), wherein the outer shell (10) is made by splicing shell plates, and is characterized in that: Inside the housing (10), several multi-functional module assemblies (50) are provided. The multi-functional module assembly (50) includes four square module combinations (40), and adjacent two module combinations (40) are arranged axially symmetrically. The module combination (40) includes two rectangular module units (20); The inside of the housing (10) is also filled with a gel medium; The module unit (20) includes two side plates (23) and a bottom plate (21) used to connect the upper and lower ends of the side plates (23). A functional cavity (22) is provided between the two side plates (23) and the two bottom plates (21). Two winding rods (30) are provided inside the functional cavity (22); The winding rod (30) includes a counterweight rod (31). A winding layer (32) is wound around the outside of the winding rod (30). The cross-section of the winding layer (32) is a spiral structure. A spiral gap channel (321) is provided inside the winding layer (32). The starting end of the winding layer (32) is fixedly connected to the counterweight rod (31). The ending end and the outside of the winding layer (32) are fixedly connected to the bottom plate (21). A wrinkled portion (211) is provided in the middle section of the bottom plate (21); In the module combination (40), the winding directions of the winding layers (32) in adjacent two winding rods (30) are opposite; In the module combination (40), three winding rods (30) form a U-shaped winding rod combination one (41), and a U-shaped flow channel is formed among the four winding rods (30); In the multi-functional module assembly (50), four winding rod combinations one (41) form a ring-shaped winding rod assembly (51), and the four sides of the winding rod assembly (51) are all serrated; In the center of the multi-functional module assembly (50), a cross-shaped winding rod combination two (52) formed by the remaining four winding rods (30) is provided.

2. The inner panel for a logistics vehicle according to claim 1, characterized in that: In the multi-functional module assembly (50), the winding directions of the winding layers (32) in adjacent two module units (20) are opposite.

3. The inner panel for a logistics vehicle according to claim 1, characterized in that: In the module unit (20), the ratio of the projected area of the two winding rods (30) at the bottom plate (21) to the area of the bottom plate (21) is x, and 0.5 ≤ x ≤ 0.

8.

4. The inner panel for a logistics vehicle according to claim 1, characterized in that: The housing (10) is made of a metal plate, a plastic plate or a rubber plate. The bottom plate (21) and the side plates (23) are both made of a plastic plate or a rubber plate. The winding layer (32) is made of a plastic plate. The counterweight rod (31) is made of a lead rod.

5. The inner panel for a logistics vehicle according to claim 1, characterized in that: The preparation method of the gel medium is as follows: Mix 40 parts by mass of sodium carboxymethylcellulose and 5000 - 6000 parts by mass of water to make a sodium carboxymethylcellulose solution. Sequentially add 200 - 230 parts by mass of acrylic acid with a neutralization degree of 60% and 80 - 100 parts by mass of acrylamide to the sodium carboxymethylcellulose solution and react for 1 - 5 h to obtain a primary cross-linked solution; Add 30-50 parts by mass of cattail fluff to the primary mixing liquid, disperse in a disperser for 30-50 minutes, then add 2.2 parts by mass of sodium persulfate, 0.9-1 parts by mass of N,N'-methylenebisacrylamide, and 50-60 parts by mass of sodium bicarbonate, and disperse for 1-2 hours to obtain a colloid; and stir and mix 10 parts by mass of the colloid, 200-230 parts by mass of cattail fluff, 20 parts by mass of sodium chloride, 9 parts by mass of sodium pyrophosphate, and 3000 parts by mass of water for 30-50 minutes to prepare a gel medium.

6. The inner village plate for a logistics trolley according to claim 5, characterized in that: The preparation method of the cattail fluff is as follows: The long-bracted cattail is trimmed, and the yellow-green or yellow-brown candle-shaped stem in the middle is taken out and sun-dried to obtain a dried cattail column, wherein the moisture content of the dried cattail column is less than 3%; The surface of the dry cattail column is rubbed, the fluff rubbed off is collected, the clumped fluff is removed, and the remaining fluff is the pre-selected cattail fluff; The preselected cattail fluff is soaked in a sodium chloride solution with a mass fraction of 1.1% for 24 to 36 hours and then sun-dried to obtain the cattail fluff, wherein the moisture content of the cattail fluff is less than 3%.

7. Use of an inner village panel for a logistics vehicle according to any one of claims 1 to 6 in a compartment of a logistics vehicle.

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