Pressure-resistant corrugated paperboard and corrugated paper box thereof

Abstract

The present application relates to the technical field of corrugated carton, in particular to a pressure-resistant corrugated paperboard and corrugated carton, which comprises internal side plates, external side plates and reinforcing assemblies, corrugated paper is arranged in the internal side plates and the external side plates, the reinforcing assemblies are installed on the internal side plates, two supporting rods are rotatably installed on the internal side plates, the two supporting rods are connected with the reinforcing assemblies, the two supporting rods rotate when the internal side plates are bent into vertical state, the top of the two supporting rods and the top of the internal side plates are in the same horizontal position, and the bottom of the supporting rods is below the bottom of the internal side plates. The corrugated carton is provided with two layers of internal and external layers, the reinforcing assemblies and the supporting rods are arranged between the two layers of corrugated carton, the triangle formed by the supporting rods improves the pressure resistance of the side plates of the corrugated carton, ensures good storage space of the goods in the transportation process, and reduces the transportation loss rate of the goods.

Description

Technical Field

[0001] This invention relates to the field of corrugated cardboard technology, specifically to a pressure-resistant corrugated cardboard and its corrugated cardboard box. Background Technology

[0002] Corrugated cardboard, also known as corrugated paperboard, is a multi-layered laminate consisting of at least one layer of corrugated paper and one layer of linerboard bonded together. It is primarily made from traditional methods using straw pulp and waste paper, which are pulped to create a base paper similar to cardboard. This base paper is then mechanically rolled into a corrugated shape, and finally bonded to the linerboard using adhesives such as sodium silicate. The corrugated corrugations of the cardboard are arranged side-by-side, supporting each other to form a triangular structure, providing good mechanical strength and the ability to withstand pressure on a flat surface. It is also elastic, offering good cushioning and able to withstand collisions and drops during handling. It is simpler and faster to manufacture than plastic cushioning materials. The process involves die-cutting, creasing, and nailing or gluing the corrugated cardboard into boxes. Pre-formed corrugated cardboard boxes facilitate the transportation, loading, unloading, and storage of goods. For a long time, corrugated cardboard boxes have gradually replaced wooden boxes and other transport packaging containers due to their superior performance and good processing properties. However, when using corrugated cardboard boxes to package items of varying lengths within the same batch (such as agricultural products), the remaining space is larger after loading shorter items, making the items prone to shaking and collisions during transportation. The corrugated cardboard box vibrates, and when the items inside collide with the side panels, the side panels deform or even break, resulting in a decrease in the pressure resistance of the corrugated cardboard box. This makes the items inside the corrugated cardboard box more susceptible to damage, increasing the loss rate of goods during transportation.

[0003] To prevent collisions between items of different sizes during transportation, which could cause deformation and damage to the side panels of corrugated cardboard boxes and reduce their pressure resistance, invention patent application number CN202011305586.4 provides a high-strength corrugated cardboard box. This invention uses a corrugated cardboard body with a U-shaped structure, a bottom on the lower left side of the box, and a connecting unit between the lower part of the box and the bottom. A plastic box is attached to the upper part of the box via a sliding fit, and a lock is installed between the box and the plastic box. The compact unit features a plastic box with a U-shaped structure. A plastic lid is located on the upper right side of the plastic box, which is fully inserted into the cardboard box. This increases the cardboard box's burst strength, preventing breakage during the transport of heavy items due to insufficient burst strength. It also reduces damage to goods caused by the corrugated cardboard box breaking, thus lowering the damage rate during transportation. However, adding a plastic box inside the cardboard box increases manufacturing costs. Furthermore, when multiple boxes are stored, stacking them takes up a significant amount of space, and the boxes cannot be folded, resulting in limited storage capacity.

[0004] Therefore, to prevent collisions between goods of different sizes inside the corrugated cardboard box during transportation, which could cause deformation and damage to the side panels and reduce the box's pressure resistance, a pressure-resistant corrugated cardboard and its corrugated cardboard box are proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure-resistant corrugated cardboard and its corrugated box. To prevent items of different sizes from shaking and colliding with the side walls of the corrugated box during transportation, thus avoiding deformation or even breakage of the side panels and reduced pressure resistance, the invention addresses this issue by setting the corrugated box to have two layers, with reinforcing components and support rods between them. The triangle formed by the support rods improves the pressure resistance of the side panels, ensuring adequate storage space for goods during transportation and reducing damage rates.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A pressure-resistant corrugated cardboard includes an inner side panel, an outer side panel, and a reinforcing assembly. Both the inner and outer side panels are square, and corrugated paper is disposed within each side panel. The outer side panel has a larger area than the inner side panel. The outer side panel includes a first side panel and a second side panel. Both the inner and outer side panels are in a flat state and are bendable. The reinforcing assembly is mounted on the inner side panel. Two support rods are rotatably mounted on the inner side panel, located between the inner and outer side panels, and connected to the reinforcing assembly. When the inner side panel is bent into a vertical state, the two support rods rotate. The tops of the two support rods are at the same horizontal level as the top of the inner side panel, and the bottoms of the support rods are below the bottom of the inner side panel, providing support.

[0008] By setting the inner and outer side panels to squares, when assembling pressure-resistant corrugated cardboard into a corrugated carton, the outer side panel covers the outside of the inner side panel. The corrugated carton has a two-layer structure. The corrugated paper inside the inner and outer side panels resembles multiple connected arches, arranged side by side and supporting each other to form a triangular structure. This structure has good mechanical strength, can withstand a certain amount of pressure from a flat surface, and is elastic, improving the buffering capacity of the inner and outer side panels. The reinforcing component and support rod are located between the inner and outer side panels. When the inner side panel bends, the reinforcing component drives the support rod to rotate. After the support rod rotates, it fits into the inside of the corrugated carton. The support rod can support the pressure from above. The double-layered side panels improve the strength of the carton, while the support rod also enhances the pressure resistance of the carton. This prevents items from shaking and colliding during transportation, causing the corrugated cardboard to vibrate, deforming, or even breaking the side panels, which would reduce the pressure resistance of the corrugated carton. This ensures good storage space for items during transportation and reduces the damage rate of goods during transport.

[0009] Preferably, the reinforcing component includes a reinforcing slider, an intermediate connecting rod, and a limiting buckle. Both the reinforcing component and the support rod are made of paper material. A sliding groove is provided on the inner side plate, and the reinforcing slider is slidably installed within the sliding groove. Two intermediate connecting rods are rotatably installed on the reinforcing slider, and each intermediate connecting rod is rotatably connected to one of the two support rods. A cylindrical retaining strip is provided on the reinforcing slider. Rectangular grooves are provided on the first and second side plates, and the center lines of the rectangular grooves and the sliding grooves are located on the same horizontal plane. The limiting buckle is rotatably installed within the rectangular groove and has a "C"-shaped retaining groove that mates with the cylindrical retaining strip. When the inner bottom plate is installed on the outer bottom plate, the limiting buckle engages with the cylindrical retaining strip. When the inner side plate is bent into a vertical state, the limiting buckle rotates, causing the reinforcing slider to move within the sliding groove.

[0010] A sliding groove is created on the inner side panel, located below the rotational connection point of the two support rods. The rotational connection point between the intermediate connecting rod and the support rod is also located below the rotational connection point. The other ends of the two intermediate connecting rods are coaxially mounted on the reinforcing slider. When the reinforcing slider moves vertically, the intermediate connecting rod pulls the two support rods to rotate. When the inner side panel is in a flat state, and the inner base plate is fitted onto the outer base plate with the snap-fit ​​groove, pressing the inner side panel causes the cylindrical snap-fit ​​strip to engage with the limiting buckle. The cylindrical snap-fit ​​strip and the limiting buckle are made of paper material. At this time, the reinforcing slider is located at the upper end of the sliding groove, and the included angle between the two ends of the two support rods is an acute angle. The inner side panel is then removed from the water... During the process of bending from a flat state to a vertical state, the limiting buckle rotates towards the direction closer to the inner side panel. The reinforcing slider is pulled from the upper end of the sliding groove to the lower end of the sliding groove by the limiting buckle. The reinforcing slider causes the support rod to rotate through the intermediate connecting rod. When the upper ends of the two support rods are flush with the top of the inner side panel, and the included angle of the two support rods forms four congruent triangles, the limiting buckle disengages from the cylindrical locking strip, and the inner side panel bends into a vertical state, forming the inner layer of the corrugated cardboard box with the inner bottom plate. When installing the inner layer of the corrugated cardboard box, the cooperation between the reinforcing component and the support rod facilitates the rotation of the support rod to a suitable support angle, improves the strength and pressure resistance of the assembled cardboard box, facilitates assembly and use, and improves the usage effect.

[0011] Preferably, a rectangular baffle is fixedly installed on the inner side panel. The rectangular baffle is located between the inner layer and the outer layer of the corrugated cardboard box. After the inner side panel is bent into a vertical state, the bottom of the rectangular baffle abuts against the end of the support rod.

[0012] By fixing a rectangular baffle above the inner side panel, during the process of bending the inner side panel from a horizontal to a vertical state, the limiting buckle drives the reinforcing slider to move. The reinforcing slider causes the support rod to rotate. When the inner side panel is not completely bent into a vertical state, the reinforcing slider has moved to the lower end of the sliding groove. At this time, the upper end face of the support rod abuts against the bottom of the rectangular baffle, and the support rod is restricted from rotating. Since both the cylindrical clip and the limiting buckle are made of paper material, and the cylindrical clip and the limiting buckle are in sliding fit, after the inner side panel is continuously bent, the limiting buckle will leave the cylindrical clip and return to the rectangular groove. The rectangular baffle and the support rod are in contact, which can make the pressure from the top of the carton evenly applied to the support rod, further improving the pressure resistance of the carton.

[0013] Preferably, two connecting grooves are symmetrically formed on the first side plate. The connecting grooves are L-shaped and their height is less than that of the first side plate. The connecting grooves extend into the interior of the first side plate. The corrugated paper in the second side plate extends out of both ends of the side wall of the second side plate. Two snap-fit ​​pieces are symmetrically arranged on the second side plate. When the second side plate is bent into a vertical state, the snap-fit ​​pieces cooperate with the connecting grooves, and the corrugated paper of the second side plate is snapped into the connecting grooves.

[0014] By symmetrically opening connecting slots on the first side panel, and bending all the internal side panels into a vertical state to form the inner layer of the corrugated cardboard box, the first side panels on both sides of the outer bottom panel are first bent from a horizontal state to a vertical state, and then the second side panel is bent from a horizontal state to a vertical state. During the bending of the second side panel, the snap-fit ​​piece is first inserted into the connecting slot to pre-fix the first side panel and the second side panel. After the corrugated paper extending from both ends of the second side panel slides relative to the side wall of the first side panel, it snaps into the connecting slot. The cross-sectional width of the corrugated paper is greater than the width of the connecting slot, so that the first side panel and the second side panel interlock, improving the connection stability of the outer layer of the corrugated cardboard box, and at the same time improving the pressure resistance of the outer layer of the corrugated cardboard box.

[0015] Preferably, the bottom of the support rod is provided with a locking groove, the height of which is equal to the thickness of the snap-fit ​​piece, and the snap-fit ​​piece engages with the locking groove when the second side plate is bent into a vertical state.

[0016] By creating a locking groove at the bottom of the support rod, when the snap-fit ​​piece is inserted into the connecting groove, the end of the snap-fit ​​piece continues to be inserted into the locking groove and engages with it. At this time, the support rod is restricted and locked by the snap-fit ​​piece, preventing the support rod from shifting when the carton is shaken or bumped by items, thus preventing the support rod from being unable to evenly bear the pressure from above the carton and improving the stability of the reinforcing components and the support rod.

[0017] Preferably, the end of the locking groove is provided with a rounded chamfer, and the snap-fit ​​piece slides and rubs against the rounded chamfer before engaging with the locking groove.

[0018] By setting a rounded chamfer at the end of the locking groove, the second side plate is bent from a horizontal state to a vertical state, and the snap-fit ​​piece has a certain rotation angle when it is inserted into the locking groove. The rounded chamfer makes the snap-fit ​​piece insert into the locking groove more smoothly, avoiding interference between the snap-fit ​​piece and the bottom of the support rod, and improving the fit.

[0019] Preferably, the support rod has reinforcing ribs on its sidewalls, and the length of the reinforcing ribs is the same as the length of the support rod.

[0020] By adding reinforcing ribs to the support rods, the compressive strength of the support rods is improved, further enhancing the pressure resistance of the carton.

[0021] A corrugated cardboard box assembled using the aforementioned corrugated cardboard includes an inner bottom plate and an outer bottom plate, both of which are square. Corrugated paper is provided inside both the inner and outer bottom plates. A cross-shaped interlocking groove, composed of four three-dimensional triangles, is provided on the upper surface of the outer bottom plate. The inner bottom plate is fitted onto the outer bottom plate with the interlocking groove. Four identical inner side plates are provided around the inner bottom plate. These inner side plates can be bent from a horizontal to a vertical position on the inner bottom plate. A first side plate and a second side plate are symmetrically arranged around the outer bottom plate, and can also be bent from a horizontal to a vertical position on the outer bottom plate. The positions of the inner side plates are parallel to the outer side plates.

[0022] The corrugated cardboard box is constructed by bending and fitting the inner bottom plate and inner side plates, as well as the outer bottom plate and outer side plates. The snap-fit ​​grooves provide positioning for the inner bottom plate, ensuring that the spacing between each inner and outer side plate is the same. The inner bottom plate is positioned above the outer bottom plate. Limiting buckles engage with cylindrical locking strips located within rectangular grooves. During the bending process of the inner side plates, the limiting buckles rotate, the reinforcing slider moves within the sliding groove, and the two support rods rotate on the inner side plates. The two support rods abut against the bottom of the rectangular baffle, and the included angle between the two support rods forms four full... The equilateral triangles and the limiting buckles disengage from the cylindrical locking strips after the inner side panels are bent into a vertical position. All the inner side panels are bent from a horizontal position to a vertical position, and then the outer side panels are bent. After the outer side panels are bent into a vertical position, the locking pieces engage with the connecting groove and the locking groove respectively. The corrugated paper of the second side panel engages with the connecting groove. The engagement completes the formation of a corrugated cardboard box. The pressure-resistant corrugated cardboard is laid flat in a horizontal position before being assembled into a corrugated cardboard box. The flat cardboard is easy to stack and store, reduces the cardboard stacking area, increases the cardboard storage capacity, and makes cardboard production easier.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. By setting reinforcing components and support rods between the inner and outer layers of the corrugated cardboard box, the support rods support the pressure from above. The double-layered side panels not only improve the strength of the cardboard box, but the support rods also enhance the pressure resistance of the cardboard box. This prevents items from shaking and colliding during transportation, causing the corrugated cardboard to vibrate, deforming or even breaking the side panels of the corrugated cardboard box, which would reduce the pressure resistance of the corrugated cardboard box. This ensures good storage space for items during transportation and reduces the damage rate of the items.

[0025] 2. By setting up the linkage between the reinforced components and the support rods, the cooperation between the components and the support rods is strengthened when installing the inner layer of the corrugated cardboard box. This facilitates the rotation of the support rods to a suitable support angle, improves the strength and pressure resistance of the assembled cardboard box, makes it easier to assemble and use, and improves the overall performance.

[0026] 3. By setting the support rod to abut against the rectangular baffle, the rectangular baffle restricts the rotation of the support rod, causing the limit buckle to disengage from the cylindrical clip. The contact between the rectangular baffle and the support rod allows the pressure from above the carton to be evenly applied to the support rod, further improving the pressure resistance of the carton. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the corrugated cardboard box of the present invention;

[0028] Figure 2 This is a schematic diagram of the flat structure of the corrugated cardboard box of the present invention;

[0029] Figure 3 This is a schematic diagram showing the mating of the inner base plate and the outer base plate of the present invention;

[0030] Figure 4 This is a schematic diagram of the bending of the internal side plate of the present invention;

[0031] Figure 5 This is a schematic diagram of the bending of the outer side plate of the present invention;

[0032] Figure 6 This is a schematic diagram of the internal structure of the corrugated cardboard box of the present invention;

[0033] Figure 7 This is a front view of the corrugated cardboard box structure of the present invention;

[0034] Figure 8 This is a cross-sectional view of the outer side plate of the present invention.

[0035] In the diagram: 1. Inner base plate; 102. Inner side plate; 103. Sliding groove; 2. Outer base plate; 21. Snap-fit ​​groove; 22. Outer side plate; 221. First side plate; 222. Connecting groove; 223. Second side plate; 224. Snap-fit ​​piece; 225. Rectangular groove; 3. Reinforcing component; 31. Reinforcing slider; 32. Intermediate connecting rod; 33. Limiting buckle; 34. Cylindrical retaining strip; 4. Corrugated paper; 5. Support rod; 51. Locking groove; 52. Reinforcing rib; 6. Rectangular baffle. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the terms "upper," "inner," "outer," "horizontal," "vertical," "top," "symmetrical," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0038] Please see Figures 2 to 8 This invention provides a pressure-resistant corrugated cardboard and a corrugated carton thereof, the technical solution of which is as follows:

[0039] A pressure-resistant corrugated cardboard includes an inner side panel 102, an outer side panel 22, and a reinforcing assembly 3. Both the inner side panel 102 and the outer side panel 22 are square. Corrugated paper 4 is disposed within both the inner side panel 102 and the outer side panel 22. The area of ​​the outer side panel 22 is larger than that of the inner side panel 102. The outer side panel 22 includes a first side panel 221 and a second side panel 223. Both the inner side panel 102 and the outer side panel 22 are in a flat state and can be bent. The reinforcing assembly... Component 3 is installed on the inner side panel 102. Two support rods 5 are rotatably mounted on the inner side panel 102. The two support rods 5 are located between the inner side panel 102 and the outer side panel 22. The two support rods 5 are connected to the reinforcing component 3. When the inner side panel 102 is bent into a vertical state, the two support rods 5 rotate. The top of the two support rods 5 is at the same level as the top of the inner side panel 102, and the bottom of the support rods 5 is located below the bottom of the inner side panel 102, thus providing support. The pressure-resistant corrugated cardboard is then assembled into a corrugated carton. The outer side panel 22 covers the outer side panel 102. The corrugated cardboard box has a two-layer structure. The corrugated paper 4 inside the inner side panel 102 and the outer side panel 22 resembles multiple connected arched doorways, arranged side by side and supporting each other to form a triangular structure. This structure has good mechanical strength, can withstand a certain amount of pressure from a planar surface, and is elastic, improving the buffering capacity of the inner side panel 102 and the outer side panel 22. The reinforcing component 3 and the support rod 5 are located between the inner side panel 102 and the outer side panel 22. When the side panel 102 is bent, the reinforcing component 3 drives the support rod 5 to rotate. After the support rod 5 has rotated, it fits into the inside of the corrugated cardboard box. The support rod 5 can support the pressure from above. The double-layered side panel improves the strength of the cardboard box, while the support rod 5 also enhances the pressure resistance of the cardboard box. This prevents the items from shaking and colliding during transportation, causing the corrugated cardboard to vibrate, and the side panel of the corrugated cardboard box to deform or even break, which would reduce the pressure resistance of the corrugated cardboard box. This ensures good storage space for the items during transportation and reduces the damage rate of the items.The reinforcing component 3 includes a reinforcing slider 31, intermediate connecting rods 32, and limiting buckles 33. Both the reinforcing component 3 and the support rods 5 are made of paper material. A sliding groove 103 is provided on the inner side plate 102. The reinforcing slider 31 is slidably installed in the sliding groove 103. Two intermediate connecting rods 32 are rotatably installed on the reinforcing slider 31, and the two intermediate connecting rods 32 are rotatably connected to the two support rods 5 respectively. A cylindrical retaining strip 34 is provided on the reinforcing slider 31. Rectangular grooves 225 are provided on the first side plate 221 and the second side plate 223. The center lines of the rectangular grooves 225 and the sliding grooves 103 are located on the same horizontal plane. The limiting buckles 33 are rotatably installed in the rectangular grooves 225. The limiting buckles 33 are provided with… The "C"-shaped groove that mates with the cylindrical retaining strip 34 allows the limiting buckle 33 to engage with the cylindrical retaining strip 34 when the inner base plate 1 is mounted on the outer base plate 2. When the inner side plate 102 is bent into a vertical position, the limiting buckle 33 rotates, causing the reinforcing slider 31 to move within the sliding groove 103. The sliding groove 103 is located below the rotational connection point of the two support rods 5. The rotational connection point of the intermediate connecting rod 32 and the support rod 5 is also located below the rotational connection point of the support rod 5. The other ends of the two intermediate connecting rods 32 are coaxially rotatably mounted on the reinforcing slider 31. When the reinforcing slider 31 moves in the vertical direction, the intermediate connecting rod 32 pulls the two support rods 5 to rotate. When the inner side plate 102 is bent into a vertical position, the limiting buckle 33 rotates, causing the reinforcing slider 31 to move within the sliding groove 103. When the inner base plate 1 is in a flat position and is installed onto the outer base plate 2 with the snap-fit ​​groove 21, pressing the inner side plate 102 causes the cylindrical snap-fit ​​strip 34 to engage with the limiting buckle 33. The cylindrical snap-fit ​​strip 34 and the limiting buckle 33 are made of paper material. At this time, the reinforcing slider 31 is located at the upper end of the sliding groove 103, and the included angle between the two ends of the two support rods 5 is an acute angle. During the process of bending the inner side plate 102 from a horizontal state to a vertical state, the limiting buckle 33 rotates towards the direction closer to the inner side plate 102. The reinforcing slider 31 is pulled from the upper end of the sliding groove 103 to the lower end of the sliding groove 103 by the limiting buckle 33. The reinforcing slider 31, through the intermediate connecting rod 32, enables the support rods 5 to engage. When rotation occurs, and the upper ends of the two support rods 5 are flush with the top of the inner side plate 102, forming four congruent triangles with the included angle of the two support rods 5, the limiting buckle 33 disengages from the cylindrical clip 34, and the inner side plate 102 bends into a vertical state, forming the inner layer of the corrugated cardboard box with the inner bottom plate 1. During the installation of the inner layer of the corrugated cardboard box, the cooperation between the reinforcing component 3 and the support rods 5 facilitates the rotation of the support rods 5 to a suitable support angle, improving the strength and pressure resistance of the assembled cardboard box, making it convenient for use and improving its performance. Reinforcing ribs 52 are provided on the support rods 5, with the same length as the support rods 5. The reinforcing ribs 52 enhance the pressure resistance of the support rods 5, further improving the pressure resistance of the cardboard box.

[0040] As one embodiment of the present invention, refer to Figures 1 to 7A rectangular baffle 6 is fixedly installed on the inner side panel 102. The rectangular baffle 6 is located between the inner layer and the outer layer of the corrugated cardboard box. After the inner side panel 102 is bent into a vertical state, the bottom of the rectangular baffle 6 abuts against the end of the support rod 5. During the process of bending the inner side panel 102 from a horizontal state to a vertical state, the limiting buckle 33 drives the reinforcing slider 31 to move. The reinforcing slider 31 causes the support rod 5 to rotate. When the inner side panel 102 is not completely bent into a vertical state, the reinforcing slider 31 has moved to the lower end of the sliding groove 103. At this time, the upper end face of the support rod 5 abuts against the bottom of the rectangular baffle 6, and the support rod 5 is restricted from rotating. Since the cylindrical clip 34 and the limiting buckle 33 are both made of paper material, and the cylindrical clip 34 and the limiting buckle 33 are both made of paper material, the limiting buckle 34 and the limiting buckle 33 are both made of paper material. The buckle 33 is a sliding fit, so after the inner side panel 102 is continuously bent, the limiting buckle 33 will leave the cylindrical clip 34 and return to the rectangular groove 225. The rectangular baffle 6 and the support rod 5 can be attached to the support rod 5 so that the pressure from above the carton can be evenly applied to the support rod 5, further improving the pressure resistance of the carton. Two connecting grooves 222 are symmetrically opened on the first side panel 221. The connecting grooves 222 are set in an "L" shape. The height of the connecting grooves 222 is less than the height of the first side panel 221. The connecting grooves 222 extend into the interior of the first side panel 221. The corrugated paper 4 in the second side panel 223 extends out of both ends of the side wall of the second side panel 223. Two snap-fit ​​pieces 224 are symmetrically arranged on the second side panel 223. When the second side panel 223 is bent into a vertical state, they snap together. The piece 224 engages with the connecting groove 222, and the corrugated paper 4 of the second side plate 223 is inserted into the connecting groove 222. After all the internal side plates 102 are bent into a vertical state to form the inner layer of the corrugated cardboard box, the first side plates 221 on both sides of the outer bottom plate 2 are first bent from a horizontal state to a vertical state, and then the second side plate 223 is bent from a horizontal state to a vertical state. During the bending of the second side plate 223, the snap-fit ​​piece 224 is first inserted into the connecting groove 222 to pre-fix the first side plate 221 and the second side plate 223. The corrugated paper 4 extending from both ends of the second side plate 223 slides relative to the side wall of the first side plate 221 and is then snapped into the connecting groove 222. The cross-sectional width of the corrugated paper 4 is greater than the width of the connecting groove 222. The first side plate 221 and the second side plate 223 are interlocked, which improves the connection stability of the outer layer of the corrugated cardboard box and the pressure resistance of the outer layer of the corrugated cardboard box. The bottom of the support rod 5 is provided with a locking groove 51. The height of the locking groove 51 is equal to the thickness of the snap-fit ​​piece 224. When the second side plate 223 is bent into a vertical state, the snap-fit ​​piece 224 cooperates with the locking groove 51. When the snap-fit ​​piece 224 is inserted into the connecting groove 222, the end of the snap-fit ​​piece 224 continues to be inserted into the locking groove 51 and cooperates with the locking groove 51. At this time, the support rod 5 is restricted from moving and locked by the snap-fit ​​piece 224, which prevents the support rod 5 from shifting after the cardboard box is shaken or collided with the items, so that the support rod 5 cannot evenly bear the pressure from the top of the cardboard box, thus improving the stability of the reinforcing component 3 and the support rod 5.The locking groove 51 has a rounded chamfer at its end. Before the snap-fit ​​piece 224 engages with the locking groove 51, it slides against the rounded chamfer. Because the second side plate 223 is bent from a horizontal to a vertical position, the snap-fit ​​piece 224 rotates at a certain angle when inserted into the locking groove 51. The rounded chamfer allows the snap-fit ​​piece 224 to be inserted into the locking groove 51 more smoothly, avoiding interference between the snap-fit ​​piece 224 and the bottom of the support rod 5, thus improving the engagement effect.

[0041] A corrugated cardboard box made of the aforementioned pressure-resistant corrugated cardboard includes an inner bottom plate 1 and an outer bottom plate 2. Both the inner bottom plate 1 and the outer bottom plate 2 are square. Corrugated paper 4 is provided inside both the inner bottom plate 1 and the outer bottom plate 2. A cross-shaped locking groove 21 is provided on the upper surface of the outer bottom plate 2. The locking groove 21 is composed of four three-dimensional triangles. The inner bottom plate 1 is fitted onto the outer bottom plate 2 with the locking groove 21. Four identical inner side plates 102 are provided around the inner bottom plate 1. It can be bent from a horizontal to a vertical state. The first side plate 221 and the second side plate 223 are symmetrically arranged around the outer base plate 2. The first side plate 221 and the second side plate 223 can be bent from a horizontal to a vertical state on the outer base plate 2. The position of the inner side plate 102 is parallel to that of the outer side plate 22. The bending fit between the inner base plate 1 and the inner side plate 102, and the bending fit between the outer base plate 2 and the outer side plate 22, constitute a corrugated cardboard box. After the snap-fit ​​groove 21 provides positioning for the inner base plate 1, it ensures that each inner side plate 102 is aligned with the outer side plate 22. With equal spacing, the inner base plate 1 is located above the outer base plate 2. The limiting buckle 33 engages with the cylindrical retaining strip 34, which is located within the rectangular groove 225. During the bending of the inner side plate 102, the limiting buckle 33 rotates, the reinforcing slider 31 moves within the sliding groove 103, and the two support rods 5 rotate on the inner side plate 102. The two support rods 5 abut against the bottom of the rectangular baffle 6, and the included angle of the two support rods 5 forms four congruent triangles. After the inner side plate 102 is bent into a vertical state, the limiting buckle 33 disengages from the cylindrical retaining strip 3. 4. After all the internal side panels 102 are bent from a horizontal state to a vertical state, the external side panels 22 are bent. After the external side panels 22 are bent into a vertical state, the snap-fit ​​pieces 224 engage with the connecting grooves 222 and the locking grooves 51 respectively. The corrugated paper 4 of the second side panel 223 engages with the connecting grooves 222. The engagement completes the formation of a corrugated cardboard box. The pressure-resistant corrugated cardboard is laid out horizontally before being assembled into a corrugated cardboard box. The flat cardboard is easy to stack and store, reduces the cardboard stacking area, increases the cardboard storage capacity, and is more convenient for cardboard production.

[0042] Working principle: The inner base plate 1 is installed onto the outer base plate 2 via the snap-fit ​​groove 21. Simultaneously, the inner side plate 102 is pressed to engage the cylindrical retaining strip 34 with the limiting buckle 33. At this time, the reinforcing slider 31 is located at the upper end of the sliding groove 103, and the included angle between the two ends of the two support rods 5 is an acute angle. During the bending of the inner side plate 102 from a horizontal to a vertical state, the limiting buckle 33 rotates towards the inner side plate 102, and the reinforcing slider 31 moves from the upper end of the sliding groove 103... Pulled to the lower end of the sliding groove 103 by the limiting buckle 33, the reinforcing slider 31 causes the support rod 5 to rotate via the intermediate connecting rod 32. When the upper end of the support rod 5 is flush with the upper surface of the inner side plate 102, the upper surface of the support rod 5 abuts against the bottom of the rectangular baffle 6, and the included angles of the support rod 5 form four congruent triangles, thus restricting the rotation of the support rod 5. Since both the cylindrical clip 34 and the limiting buckle 33 are made of paper material, and the cylindrical clip 34 and the limiting buckle 33 are in sliding fit, the internal... After the side panel 102 is continuously bent, the limiting buckle 33 will disengage from the cylindrical retaining strip 34 and return to the rectangular groove 225. All the internal side panels 102 are bent from a horizontal to a vertical state to form the inner layer of the corrugated cardboard box. Then, the first side panels 221 on both sides of the outer bottom panel 2 are bent from a horizontal to a vertical state, and then the second side panel 223 is bent from a horizontal to a vertical state. During the bending process of the second side panel 223, the snap-fit ​​piece 224 is first inserted into the connecting groove 222, causing the first side panel 221... Pre-fixing is completed between the second side plate 223 and the corrugated paper 4 extending from both ends of the second side plate 223 slides relative to the side wall of the first side plate 221 and is snapped into the connecting groove 222. When the snap-fit ​​piece 224 is inserted into the connecting groove 222, the end of the snap-fit ​​piece 224 continues to be inserted into the locking groove 51 and cooperates with the locking groove 51. At this time, the support rod 5 is restricted and locked by the snap-fit ​​piece 224. After all the external side plates 22 are bent from the horizontal state to the vertical state, they form the outer layer of the corrugated cardboard box.

[0043] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A pressure-resistant corrugated cardboard, characterized in that, It includes an inner base plate, an outer base plate, an inner side plate, an outer side plate, and a reinforcing component. The inner side plate and the outer side plate are both square. Corrugated paper is provided inside the inner side plate and the outer side plate. The area of ​​the outer side plate is larger than that of the inner side plate. The outer side plate includes a first side plate and a second side plate. The inner bottom plate is provided with four identical inner side plates around its perimeter. The inner side plates can be bent from a horizontal state to a vertical state on the inner bottom plate. The first side plate and the second side plate are symmetrically arranged around the outer bottom plate. The first side plate and the second side plate can be bent from a horizontal state to a vertical state on the outer bottom plate. The reinforcing component is installed on the inner side plate, and two support rods are rotatably mounted on the inner side plate. The two support rods are located between the inner side plate and the outer side plate, and the two support rods are connected to the reinforcing component. The reinforcing component includes a reinforcing slider, an intermediate connecting rod, and a limiting buckle. Both the reinforcing component and the support rod are made of paper material. A sliding groove is provided on the inner side plate, and the reinforcing slider is slidably installed in the sliding groove. Two intermediate connecting rods are rotatably installed on the reinforcing slider, and the two intermediate connecting rods are rotatably connected to two support rods respectively. A cylindrical retaining strip is provided on the reinforcing slider. Rectangular grooves are provided on the first side plate and the second side plate. The center lines of the rectangular grooves and the sliding grooves are located on the same horizontal plane. The limiting buckle is rotatably installed in the rectangular grooves, and a "C"-shaped retaining groove is provided on the limiting buckle to cooperate with the cylindrical retaining strip. When the inner base plate is installed on the outer base plate, the limiting buckle engages with the cylindrical clip. During the process of bending the inner side plate from a horizontal state to a vertical state, the limiting buckle rotates and drives the reinforcing slider to move in the sliding groove. When the reinforcing slider moves in the vertical direction, the intermediate connecting rod pulls the two support rods to rotate. The tops of the two support rods are at the same horizontal position as the top of the inner side plate, and the bottoms of the support rods are located below the bottom of the inner side plate.

2. The pressure-resistant corrugated cardboard according to claim 1, characterized in that, The four inner side panels are bent from a horizontal position to a vertical position to form the inner layer of the corrugated cardboard box, and the outer side panels are bent from a horizontal position to a vertical position to form the outer layer of the corrugated cardboard box. A rectangular baffle is fixedly installed on the inner side panel. The rectangular baffle is located between the inner and outer layers of the corrugated cardboard box. After the inner side panel is bent to a vertical position, the bottom of the rectangular baffle abuts against the end of the support rod.

3. The pressure-resistant corrugated cardboard according to claim 1, characterized in that, Two connecting slots are symmetrically formed on the first side plate. The connecting slots are L-shaped and their height is less than that of the first side plate. The connecting slots extend into the interior of the first side plate. The corrugated paper inside the second side plate extends out of both ends of the side wall of the second side plate. Two snap-fit ​​pieces are symmetrically arranged on the second side plate. When the second side plate is bent into a vertical state, the snap-fit ​​pieces cooperate with the connecting slots, and the corrugated paper of the second side plate is snapped into the connecting slots.

4. The pressure-resistant corrugated cardboard according to claim 3, characterized in that, The bottom of the support rod is provided with a locking groove, the height of which is equal to the thickness of the snap-fit ​​piece. When the second side plate is bent into a vertical state, the snap-fit ​​piece engages with the locking groove.

5. The pressure-resistant corrugated cardboard according to claim 4, characterized in that, The locking groove has a rounded chamfer at its end, and the snap-fit ​​piece slides and rubs against the rounded chamfer before engaging with the locking groove.

6. The pressure-resistant corrugated cardboard according to claim 1, characterized in that, The support rod has reinforcing ribs on its side wall, and the length of the reinforcing ribs is the same as the length of the support rod.

7. A corrugated cardboard box constructed using the pressure-resistant corrugated cardboard according to any one of claims 1-6, characterized in that, The device includes an inner base plate and an outer base plate, both of which are square. Corrugated paper is installed inside both the inner and outer base plates. The upper surface of the outer base plate has a cross-shaped locking groove composed of four three-dimensional triangles. The inner base plate is installed on the outer base plate by fitting the locking groove. Four identical inner side plates are arranged around the inner base plate. The inner side plates can be bent from a horizontal to a vertical position on the inner base plate. The first and second side plates are symmetrically arranged around the outer base plate. The first and second side plates can be bent from a horizontal to a vertical position on the outer base plate. The positions of the inner side plates are parallel to the outer side plates.

Images