Double-layer logistics box

Abstract

The utility model discloses a double-layer logistics box, and relates to the technical field of packaging products. Comprising a logistics box main body, and the logistics box main body is formed by oppositely placing two buffer cover cavities and locking through a screw pair or bundling and connecting through a bundling belt; the buffering cover is of a double-wall hollow structure formed by blow molding of environment-friendly flame-retardant plastic, has good strength and buffering performance through the wall face reinforcing ribs, the wall face steps and the wall face arc design, is resistant to pressure and impact and not prone to breakage, and is environmentally friendly, flame-retardant, waterproof, damp-proof and mildew-proof; furthermore, a sealed air layer or vacuum sealing treatment or foaming filling or other heat insulation treatment is adopted between the double-layer walls, so that the heat insulation box can be conveniently made; therefore, a logistics foam box can be replaced, and the defects that a foam box is not environmentally friendly, low in strength, inflammable and fragile, cannot load slightly heavy products and the like can be overcome; the double-layer logistics box provides a brand new solution for the fields of cold-chain logistics, fresh food e-commerce, medicine transportation and the like, and has a wide application prospect.

Description

Technical Field

[0001] This utility model relates to the field of packaging product technology, specifically a double-layer logistics box. Background Technology

[0002] Currently, most logistics transportation of fresh produce, fruits, vegetables, and other food items that require preservation and pressure protection uses foam boxes. However, foam boxes have the following serious drawbacks:

[0003] 1. Not environmentally friendly; foam products are not environmentally friendly. Not only is foam difficult to degrade, but it also contains many toxic substances and cannot pass environmental protection tests. Moreover, foam is easy to break into small particles to form microplastics (foam particles with a diameter of less than 5 mm), which cause serious harm to animals and nature.

[0004] 2. Although foam has good cushioning properties, its strength is limited and it is very brittle. When protecting slightly heavier products, it is easy to break and lose its protective function.

[0005] 3. Foam is an extremely flammable substance. It will ignite immediately upon contact with a spark and is very difficult to extinguish. It poses a fire hazard no matter where it is stored.

[0006] 4. Due to the limited insulation performance of thick-walled foam boxes, foam boxes with ice packs can generally keep food fresh for about 18-48 hours. During this period, it is impossible to complete delivery in many parts of the country under normal circumstances. Utility Model Content

[0007] To achieve the above objectives, the present invention provides the following technical solution: a double-layer logistics box, comprising a logistics box body, wherein the interior of the logistics box body is provided with a buffer and heat-insulating storage space, and the logistics box body includes two symmetrically arranged buffer covers that are locked by strapping straps or screws, wherein the buffer covers have a double-wall structure and a cavity is provided between the double walls.

[0008] As a preferred embodiment of this utility model, a groove is provided at the connection between the inner and outer walls of the buffer cover.

[0009] As a preferred technical solution of this utility model, the cavity is one of the following: a vacuum insulation cavity, a sealed air layer, a foam insulation layer, or a insulation material filling layer.

[0010] As a preferred embodiment of this utility model, the bottom surfaces of both the inner and outer sidewalls are provided with a number of intersecting wall reinforcement ribs.

[0011] As a preferred embodiment of this utility model, the wall reinforcing ribs are segmented and deepened in an arched shape towards the cavity.

[0012] As a preferred embodiment of this utility model, a hand-raising step is provided on the outer side wall, and the four sides of the hand-raising step are all arc-shaped.

[0013] As a preferred technical solution of this utility model, each of the four corners of the lifting step is provided with a connecting hole for threading screws or cable ties to connect the two buffer covers.

[0014] As a preferred embodiment of this utility model, several sidewall reinforcing ribs are provided on the inner walls of the four sides of the inner wall.

[0015] Compared with the prior art, the present invention provides a double-layer logistics box, which has the following beneficial effects:

[0016] This double-layer logistics box features a blow-molded cushioning lid, eliminating the risk of foam breakage and avoiding the environmental hazards of microplastics. Its double-walled structure, combined with cavities and an insulating coating, provides multi-level insulation. The mechanically reinforced structure, consisting of wall and side wall ribs, significantly enhances its compressive strength. The modular assembly method allows for simple and quick operation, completely solving the four major problems of foam boxes: poor environmental performance, low strength, flammability, and weak insulation. It also achieves the industrial advantages of low cost, easy assembly, and long lifespan, providing a new solution for cold chain logistics, fresh food e-commerce, and pharmaceutical transportation, with broad application prospects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a double-layer logistics box proposed in this utility model;

[0018] Figure 2 This is an exploded view of the structure of a double-layer logistics box proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the buffer cover structure of a double-layer logistics box proposed in this utility model;

[0020] Figure 4 This is a cross-sectional view of the main structure of a double-layer logistics box proposed in this utility model;

[0021] Figure 5 This is a cross-sectional view of the buffer cover structure of a double-layer logistics box proposed in this utility model;

[0022] Figure 6 This is a schematic diagram of the groove laser cutting state of a double-layer logistics box proposed in this utility model;

[0023] Figure 7 This diagram illustrates a method for preparing a double-layer logistics box according to this utility model.

[0024] In the diagram: 1. Main body of the logistics box; 11. Buffer cover; 111. Inner side wall; 112. Outer side wall; 113. Cavity; 114. Groove; 115. Wall reinforcement rib; 116. Handrail step; 117. Connecting hole; 118. Side wall reinforcement rib; 119. Screw pair; 12. Buffer and heat-insulating storage space. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-7 A double-layer logistics box includes a logistics box body 1, the logistics box body 1 having a buffer and heat-insulating storage space 12 inside, the logistics box body 1 including two symmetrically arranged buffer covers 11 and locked by strapping straps or screw pairs 119, the buffer covers 11 having a double-wall structure and a cavity 113 between the double walls.

[0027] As a specific technical solution of this embodiment, a groove 114 is provided at the connection between the inner sidewall 111 and the outer sidewall 112 of the buffer cover 11.

[0028] In this embodiment, the groove 114 at the connection between the inner wall 111 and the outer wall 112 is U-shaped. The inner wall 111 and the outer wall 112 are connected by the U-shaped groove 114, which enhances the deformation resistance of the double wall edge and avoids cracks caused by stress concentration. The depth limitation of the groove 114 can prevent the inner and outer double walls from collapsing during vacuuming.

[0029] As a specific technical solution in this embodiment, the cavity 113 is one of a vacuum insulation cavity, a sealed air layer, a foam insulation layer, or an insulation material filling layer.

[0030] In this implementation scheme, the vacuum insulation cavity significantly reduces the overall thermal conductivity of the enclosure by eliminating air heat conduction and convection, making it suitable for high insulation requirements such as cold chain transportation; the sealed air layer utilizes the low thermal conductivity of still air to achieve basic insulation while reducing process complexity, making it suitable for low-cost and rapid production; the foam insulation layer combines structural support and insulation functions, making it suitable for heavy logistics scenarios with high mechanical strength requirements.

[0031] As a specific technical solution in this embodiment, a number of intersecting wall reinforcing ribs 115 are provided on the bottom surface of both the inner wall 111 and the outer wall 112.

[0032] In this implementation plan, the crisscrossing wall reinforcing ribs 115 form a grid support structure, which disperses external impact forces and greatly improves the compressive strength of the box.

[0033] As a specific technical solution in this embodiment, the wall reinforcing rib 115 is segmented and deepened in an arched shape towards the cavity 113.

[0034] In this implementation scheme, the arched wall reinforcement 115 converts vertical pressure into lateral support force, similar to the arched design of a bridge, further improving compressive strength while reducing material usage and manufacturing costs, which is economically efficient and has broad application prospects.

[0035] As a specific technical solution in this embodiment, a lifting step 116 is provided on the outer side wall 112, and the four sides of the lifting step 116 are all arc-shaped.

[0036] In this implementation plan, the curved concave lifting step 116 is ergonomically designed, increasing the contact area when lifting with one hand, improving carrying comfort and making it less prone to slipping. It is also suitable for narrow spaces, such as the gripping needs when placed against a wall.

[0037] As a specific technical solution in this embodiment, each of the four corners of the lifting step 116 is provided with a connecting hole 117 for threading a screw pair 119 or a strapping strap to connect the two buffer covers 11.

[0038] In this embodiment, the screw pair 119 is a combination of screw and nut. The screw and nut are placed into the connecting holes 117 on the two buffer covers 11 respectively, and the assembly is completed by tightening the nut. The connecting holes 117 are isolated from the cavity 113 to avoid damaging the vacuum seal of the cavity 113 when the screw is tightened. At the same time, the four corners of the connecting holes 117 make the tightening force uniform and reduce the deformation of the joint of the buffer cover 11.

[0039] As a specific technical solution in this embodiment, a number of sidewall reinforcing ribs 118 are provided on the four sides of the inner wall 111.

[0040] A method for preparing a double-layer logistics box includes the following steps:

[0041] S1. Buffer cover molding: The buffer cover 11 with a double-walled hollow structure is prepared by blow molding process;

[0042] S2. Cavity treatment: Use a vacuum machine to evacuate the air between cavities 113 to form a vacuum insulation cavity and then seal it, or directly seal cavities 113 to form a sealed air layer, or use expanding foam to fill cavities 113 to form a expanding foam insulation layer.

[0043] S3. The enclosure is reinforced with a step 116 for raising the arm on the outer side wall 112 and a side wall reinforcing rib 118 on the inner side wall 111. Several crisscrossing arched wall reinforcing ribs 115 that deepen towards the cavity 113 are provided on the bottom surfaces of the inner side wall 111 and the outer side wall 112, which strengthen the enclosure wall and support the space between the two walls.

[0044] S4. Set connection holes. Set connection holes 117 inside the four corners of the lifting step 116. The connection holes 117 are not connected to the cavity 113.

[0045] S5. Assemble and seal: Place the two buffer covers 11 cavities opposite each other, and secure them with screws 119 through the connecting hole 117 or by strapping through the connecting hole 117 or by directly binding them with tape or wrapping straps. Seal the joint between the two buffer covers 11 with tape or glue to form a sealed logistics box body 1.

[0046] As a specific technical solution in this embodiment, see [link / reference]. Figure 6 An optional step is added between S1 and S2: when it is necessary to improve the heat insulation performance, the inner and outer walls are separated into point-like connections or completely separated by laser cutting at the groove 114 connection of the inner sidewall 111 and the outer sidewall 112. Then, the cut gap is filled with one or a combination of aerogel, foam, or glass glue before sealing the cavity 113 or vacuum sealing or foaming treatment. An optional step is added before S5: when it is necessary to improve the heat insulation performance, the outer sidewall 112 and the lifting step 116 are coated with an aerogel heat insulation coating. The sidewall reinforcing ribs 118 work together with the heat insulation coating to improve the lateral impact resistance and reflect external radiant heat, thereby improving the overall heat insulation efficiency. The heat insulation coating can be an aerogel coating.

[0047] In summary, this double-layer logistics box, with its blow-molded cushioning lid 11, eliminates the risk of foam breakage and avoids the environmental hazards of microplastics. The double-wall structure, combined with the cavity 113 and heat-insulating coating, achieves multi-level insulation. The mechanically reinforced structure, composed of wall reinforcement ribs 115 and side wall reinforcement ribs 118, significantly enhances its compressive strength. Its modular assembly method makes operation simple and quick, completely solving the four major pain points of foam boxes: poor environmental performance, low strength, flammability, and weak insulation. It also achieves the industrial advantages of low cost, easy assembly, and long lifespan, providing a new solution for cold chain logistics, fresh food e-commerce, and pharmaceutical transportation, and has broad application prospects.

[0048] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-decker logistics box comprising a logistics box main body (1), characterized in that: The inside of the logistics box body (1) is provided with a buffer heat preservation storage space (12), the logistics box body (1) comprises two symmetrically arranged buffer covers (11) which are locked by a binding belt or a screw pair (119), the buffer cover (11) is a double-wall structure and a cavity (113) is arranged between the double walls.

2. The dual-depth logistic box of claim 1, wherein: A groove (114) is arranged at the connecting position of the inner side wall (111) and the outer side wall (112) of the buffer cover (11).

3. The dual-depth logistics box of claim 1, wherein: The cavity (113) is one of a vacuum heat insulation cavity, a sealed air layer, a foamed glue heat insulation layer and a heat insulation material filling layer.

4. The dual-depth logistics box of claim 2, wherein: The bottom surface of the inner side wall (111) and the outer side wall (112) is provided with a plurality of longitudinal and transverse intersecting wall surface reinforcing ribs (115).

5. The dual-depth logistics box of claim 4, wherein: The wall surface reinforcing ribs (115) are segmented and arc-shaped deepened towards the cavity (113).

6. The dual-depth logistics box of claim 2, wherein: The outer side wall (112) is provided with a hand lifting step (116), and the four sides of the hand lifting step (116) are arc-shaped.

7. A double stackable logistics box according to claim 6, characterized in that: The four corners of the hand lifting step (116) are provided with connecting holes (117) inside, which are used for penetrating the screw pair (119) or the binding belt to connect the two buffer covers (11).

8. The dual-depth logistic box of claim 2, wherein: The inner side wall (111) is provided with a plurality of side wall reinforcing ribs (118) on the inner wall around the inner side wall (111).

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