Corrugated carton with good compression resistance

Abstract

The utility model discloses a corrugated carton with good compression resistance effect relates to the technical field of corrugated carton, including box bottom plate, four side walls and box cover, the inner surface of side wall is provided with a plurality of reinforcing ribs formed by corrugated paperboard pressing, the bottom of reinforcing rib is fixedly connected to the edge of the top of box bottom plate, the utility model discloses reinforcing rib structure is set up in the inner surface of side wall, and the cooperation inside filling lightweight high elasticity foamed polymer material not only greatly enhanced the vertical compression strength of box body, and effectively resisted the stacking pressure, but also provided excellent buffer shock -absorbing protection for content, through the precision insertion of trapezoidal groove and trapezoidal block, formed reliable mechanical interlocking, greatly promoted the stacking stability and integrity, prevented the deviation in the transportation, and further made the paper box keep the light environmental protection advantage of traditional corrugated paper packaging, and presented the excellent compression resistance, stability and protection performance.

Description

Technical Field

[0001] This utility model relates to the field of corrugated cardboard box technology, specifically to a corrugated cardboard box with good compression resistance. Background Technology

[0002] Corrugated cardboard boxes are a common and widely used packaging product that has permeated all aspects of our daily lives. Due to their extremely wide range of applications, their usage has always ranked among the top of all packaging products. They are lightweight, sturdy, shock-absorbing, and suitable for mechanized production. For many years, they have been used for transport packaging and sales packaging. Corrugated cardboard boxes have won the market with their exquisite appearance and excellent internal quality.

[0003] Patent document CN213139562U discloses a pressure-resistant corrugated cardboard box structure, which states that "this utility model relates to a pressure-resistant corrugated cardboard box structure, which is composed of right-angled pyramid pressure-resistant devices. The right-angled pyramid pressure-resistant devices are set at the eight right angles of the pressure-resistant corrugated cardboard box, and the right-angled pyramid pressure-resistant devices are three-right-angled pyramid panels, fixed connecting rod three-right-angled pyramids, or movable rod right-angled pyramids."

[0004] However, the compression-resistant corrugated cardboard box structure described in the aforementioned publicly available documents lacks an effective mechanical interlocking mechanism during stacking, resulting in unstable stacking and a tendency to shift or collapse during transportation.

[0005] Therefore, it is necessary to develop a corrugated cardboard box with good compression resistance, thereby improving its practicality in use. Utility Model Content

[0006] The purpose of this utility model is to provide a corrugated cardboard box with good compression resistance to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a corrugated cardboard box with good compression resistance, comprising a bottom plate, four side walls and a lid, wherein the inner surface of the side walls is provided with a plurality of reinforcing ribs formed by pressing corrugated cardboard, and the bottom of the reinforcing ribs is fixedly connected to the top edge of the bottom plate. The top of the reinforcing rib is provided with a trapezoidal groove, and the interior of the reinforcing rib is filled with a foamed polymer material, which is one of polyurethane foam, polystyrene foam or polyethylene foam. The inner top wall of the box cover is provided with a trapezoidal block that matches the trapezoidal groove. When the box cover is closed, the trapezoidal block is inserted into the trapezoidal groove.

[0008] Preferably, a reinforcing frame is fixedly connected to the inner top wall of the box cover, and a plurality of mounting plates are fixedly connected to the bottom of the reinforcing frame, with the bottom of the mounting plates fixedly connected to the top of the trapezoidal block.

[0009] Preferably, a reinforcing corner insert is provided at the connection crease of the side box wall. The reinforcing corner insert has an L-shaped structure, and its cross-section matches the inner corner of the box.

[0010] Preferably, the bottom of the box bottom plate is provided with a cross-shaped reinforcing strip, and the paper fiber direction of the reinforcing strip is cross-shaped with the paper fiber direction of the box bottom.

[0011] Preferably, each of the four corners of the bottom of the box is fixedly connected with a covered bottom corner, and the vertical surface of the covered bottom corner is fixedly connected to the outer wall of the side box wall.

[0012] Preferably, the outer wall of the bottom corner is covered with a waterproof membrane.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, through the reinforcing rib structure set on the inner surface of the side box wall, combined with the lightweight, highly elastic foamed polymer material filled inside, not only greatly enhances the vertical compressive strength of the box and effectively resists stacking pressure, but also provides excellent cushioning and shock absorption protection for the contents. The precise interlocking of the trapezoidal groove and trapezoidal block forms a reliable mechanical interlock, which greatly improves the stacking stability and integrity, prevents deviation during transportation, and thus enables the carton to maintain the advantages of traditional corrugated cardboard packaging in terms of lightness and environmental friendliness while exhibiting excellent compressive strength, stability and protective performance.

[0014] This invention effectively reinforces the weakest corner of the box by using L-shaped reinforcing corner inserts at the creases of the side walls, preventing cracking or deformation under pressure and ensuring the overall squareness and stability of the box structure. Secondly, the reinforcing strips crisscrossed at the bottom of the box, with fiber distribution in different directions, greatly enhance the tear resistance and load-bearing strength of the bottom plate. The covered bottom corners provide solid physical protection for areas prone to wear and impact, and the covered bottom corners are also covered with a waterproof membrane, which is specifically designed for humid environments and provides an effective moisture barrier for the core stress points, ensuring the strength and durability of the carton under harsh conditions. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the overall structure of this utility model; Figure 2 This is a three-dimensional schematic diagram of the side box wall structure of this utility model; Figure 3 This is a schematic diagram of the box cover structure of this utility model; Figure 4 This is a schematic diagram of the bottom plate structure of the box according to this utility model; Figure 5 This is a schematic diagram of the reinforcing rib structure of this utility model.

[0016] In the diagram: 1. Box bottom plate; 2. Side box wall; 3. Box lid; 4. Reinforcing rib; 5. Trapezoidal groove; 6. Trapezoidal block; 7. Reinforcing frame; 8. Mounting plate; 9. Reinforcing corner liner; 11. Reinforcing strip; 12. Covering bottom corner; 13. Waterproof membrane. Detailed Implementation

[0017] 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.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Please see Figure 1 , Figure 2 and Figure 3According to one embodiment of this utility model, a corrugated cardboard box with good compression resistance includes a bottom plate 1, four side walls 2, and a lid 3. The inner surface of the side walls 2 is provided with a number of reinforcing ribs 4 formed by pressing corrugated cardboard. The bottom of the reinforcing ribs 4 is fixedly connected to the top edge of the bottom plate 1. The top of the reinforcing ribs 4 is provided with a trapezoidal groove 5. The inside of the reinforcing ribs 4 is filled with a foamed polymer material, which is one of polyurethane foam, polystyrene foam, or polyethylene foam. The inner top wall of the lid 3 is provided with a trapezoidal block 6 that matches the trapezoidal groove 5. When the lid 3 is closed, the trapezoidal block 6 is inserted into the trapezoidal groove 5. The inner top wall of the lid 3 is fixedly connected with a reinforcing frame 7. The bottom of the reinforcing frame 7 is fixedly connected with a number of mounting plates 8, and the bottom of the mounting plates 8 is fixedly connected to the top of the trapezoidal block 6. Furthermore, a reinforcing rib 4 formed by pressing corrugated cardboard is provided on the inner surface of the side box wall 2, which is equivalent to adding a column inside the box. This directly and effectively resists the stacking pressure from above, preventing the side box wall 2 from denting or bending under heavy pressure. The bottom of the reinforcing rib 4 is fixed to the edge of the bottom plate 1 of the box, effectively transferring and dispersing the pressure to the bottom plate, avoiding stress concentration, and making the overall structure more stable. Through the trapezoidal groove 5 and trapezoidal block 6, when the box lid 3 is closed, the trapezoidal block 6 inserts into the trapezoidal groove 5, forming a mechanical interlock of mortise and tenon structure. This design can effectively prevent the boxes stacked on top of each other from sliding laterally during transportation, greatly improving the stability and safety of stacking. The interlocking structure makes the box lid 3 and the box body no longer two independent parts, but form a unified load-bearing frame, sharing the pressure and thus improving the pressure resistance. The interior of the reinforcing rib 4 is filled with one of polyurethane foam, polystyrene foam or polyethylene foam. These materials are lightweight, elastic and have strong energy absorption. First, the filling supports the wall of the reinforcing rib 4 and prevents it from being easily crushed, which further enhances the structural strength. Second, it can effectively absorb and disperse the impact and vibration energy generated during transportation, providing additional cushioning protection for the items in the box and reducing the risk of damage caused by bumps and falls. A reinforcing frame 7 is provided on the inner top wall of the box cover 3 and connected to the trapezoidal block 6 through the mounting plate 8. This design greatly enhances the rigidity of the box cover 3 itself. The reinforcing frame 7 can effectively resist this deformation, ensuring that the box cover 3 is flat, thereby ensuring that the uppermost trapezoidal block 6 can be accurately and firmly inserted into the groove of the box below, maintaining the effectiveness of the entire locking system. Please see Figure 1 , Figure 2 , Figure 4 and Figure 5According to one embodiment of this utility model, a corrugated cardboard box with good compression resistance is provided. The side wall 2 is provided with a reinforcing corner liner 9 at the connection fold. The reinforcing corner liner 9 has an L-shaped structure and the cross-section of the reinforcing corner liner 9 matches the inner corner of the box. The bottom of the box bottom plate 1 is provided with a cross-shaped reinforcing strip 11. The paper fiber direction of the reinforcing strip 11 is arranged to cross the paper fiber direction of the bottom of the box. The four corners of the bottom of the box bottom plate 1 are fixedly connected with a bottom corner 12, and the vertical surface of the bottom corner 12 is fixedly connected to the outer wall of the side wall 2. The outer wall of the bottom corner 12 is covered with a waterproof membrane 13. Furthermore, the L-shaped reinforcing corner insert 9 is directly attached to the corner of the carton, the area where stress is most concentrated, which greatly enhances the rigidity and tear resistance of the carton corner, preventing the corner from cracking or deforming due to pressure or impact. In addition, by reinforcing the weakest connection crease, the reinforcing corner insert 9 helps to maintain the square shape of the carton throughout the entire compression process, preventing the carton from collapsing due to imbalance. By intersecting the paper fiber direction of reinforcing strip 11 with the original fiber direction of the bottom of the box, a composite reinforcing layer is formed, which effectively resists tearing forces from all directions, especially preventing the bottom from cracking under the action of heavy contents. The intersecting fiber direction can better distribute the pressure evenly to the entire bottom plate area, reduce local stress concentration, and thus improve the overall load-bearing capacity. The bottom corners of the carton are most susceptible to wear, impact and moisture during handling, transportation and stacking. Covering the bottom corners 12 provides additional physical armor for these four key points, greatly enhancing their wear resistance and impact resistance. The vertical surface of the covered bottom corners 12 is fixedly connected to the outer wall of the side box 2. This design more firmly integrates the bottom, corners and side walls of the box into a whole, further improving the structural stability and overall rigidity of the box. The strength of a cardboard box drops sharply after it gets damp. Covering the bottom corners, where it is most likely to come into contact with ground moisture and splashes, with a waterproof membrane 13 forms an effective moisture barrier. This significantly improves the durability and compressive strength retention of the cardboard box in humid environments. The waterproof treatment avoids problems such as softening and deformation of the cardboard caused by moisture absorption, ensuring that the cardboard box maintains its design strength throughout transportation and storage, and extending its effective service life.

[0021] Working principle: The reinforcing ribs 4 on the inner surface of the side wall 2, combined with the lightweight, highly elastic foamed polymer material inside, not only greatly enhance the vertical compressive strength of the box, effectively resisting stacking pressure, but also provide excellent cushioning and shock absorption protection for the contents. The precise interlocking of the trapezoidal grooves 5 and trapezoidal blocks 6 forms a reliable mechanical interlock, greatly improving stacking stability and integrity, preventing shifting during transportation. Thus, while maintaining the lightweight and environmentally friendly advantages of traditional corrugated cardboard packaging, this carton exhibits superior compressive strength, stability, and protective performance. The side wall 2 connects the folds... The L-shaped reinforcing corner liner 9 effectively reinforces the weakest corner of the box, preventing it from cracking or deforming under pressure, and ensuring the overall squareness and stability of the box structure. Secondly, the reinforcing strips 11 arranged crosswise at the bottom of the box bottom plate 1 greatly enhance the tear resistance and load-bearing strength of the bottom plate through the fiber distribution in different directions. The covered bottom corners 12 at the four corners of the box bottom provide solid physical protection for the parts that are easily worn and impacted. At the same time, the covered bottom corners 12 are also covered with a waterproof membrane 13, which can be specifically designed for humid environments, providing an effective moisture barrier for the core stress points and ensuring the strength and durability of the carton under harsh conditions.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A corrugated cardboard box with good compression resistance, comprising a bottom plate (1), four side walls (2), and a lid (3), characterized in that: The inner surface of the side box wall (2) is provided with several reinforcing ribs (4) formed by pressing corrugated cardboard, and the bottom of the reinforcing ribs (4) is fixedly connected to the edge of the top of the box bottom plate (1). The top of the reinforcing rib (4) is provided with a trapezoidal groove (5), and the interior of the reinforcing rib (4) is filled with a foamed polymer material, which is one of polyurethane foam, polystyrene foam or polyethylene foam. The inner top wall of the box cover (3) is provided with a trapezoidal block (6) that is adapted to the trapezoidal groove (5). When the box cover (3) is closed, the trapezoidal block (6) is inserted into the trapezoidal groove (5).

2. The corrugated cardboard box with good compression resistance according to claim 1, characterized in that: The inner top wall of the box cover (3) is fixedly connected to a reinforcing frame (7), and the bottom of the reinforcing frame (7) is fixedly connected to several mounting plates (8), and the bottom of the mounting plates (8) is fixedly connected to the top of the trapezoidal block (6).

3. A corrugated cardboard box with good compression resistance according to claim 1, characterized in that: A reinforcing corner liner (9) is provided at the connection crease of the side box wall (2). The reinforcing corner liner (9) has an L-shaped structure and its cross-section matches the inner corner of the box.

4. A corrugated cardboard box with good compression resistance according to claim 1, characterized in that: The bottom of the box bottom plate (1) is provided with a cross-shaped reinforcing strip (11), and the paper fiber direction of the reinforcing strip (11) is cross-shaped with the paper fiber direction of the box bottom.

5. A corrugated cardboard box with good compression resistance according to claim 1, characterized in that: The bottom of the box bottom plate (1) is fixedly connected to the four corners of the bottom with a cover corner (12), and the vertical surface of the cover corner (12) is fixedly connected to the outer wall of the side box wall (2).

6. A corrugated cardboard box with good compression resistance according to claim 5, characterized in that: The outer wall of the covered bottom corner (12) is covered with a waterproof membrane (13).

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