Stackable paper box

Abstract

The utility model belongs to the technical field of paper products, and particularly relates to a stackable paper box. Comprising a box body formed by folding a single paperboard, and further comprises a bottom plate, two pairs of symmetrically-arranged side plates and end plates are arranged along the periphery of the bottom plate, and the side plates and the end plates are both connected with the bottom plate in a foldable mode through folding lines; the corner plates are connected with the two ends of the side plates through folding lines, clamping heads are arranged on the outer edges of the corner plates, foldable vertical meshing structures are arranged on the clamping heads, limiting holes matched with the clamping heads are formed in the bottom plate, and when the box bodies are stacked, the vertical meshing structures are unfolded to form meshing after being inserted into the limiting holes along with the clamping heads; the transverse buckles are connected with the inner edges of the angle plates through folding lines, and clamping grooves matched with the transverse buckles are formed in the end plates corresponding to the angle plates. The vertical bite plate and the transverse bite plate are arranged on the box body structure and matched with the clamping grooves and the limiting holes, so that double fixed connection of the upper layer box body and the lower layer box body during stacking is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of paper product technology, and specifically refers to a stackable paper box. Background Technology

[0002] In modern commerce and logistics, cardboard boxes play a vital role as a widely used packaging container. With their advantages of low cost, ease of processing and shaping, and recyclability, they are extensively used for packaging various goods, including food, pharmaceuticals, electronics, and daily necessities. Whether in the manufacturing process, warehousing and transportation, or the final retail stage, cardboard boxes fulfill important functions such as protecting goods, facilitating storage and transport, and displaying product information. Through proper design, cardboard boxes can provide reliable protection for goods, preventing damage from collisions and compression during handling and stacking, while also facilitating product classification and management for businesses and identification and selection for consumers.

[0003] However, existing cardboard boxes have significant shortcomings when stacked. Currently, most cardboard boxes rely primarily on their own weight and simple contact for stability when stacked, lacking effective connecting and fixing structures. For example, during logistics transportation, when vehicles experience bumps or sudden braking, the upper cardboard boxes are prone to relative sliding with the lower ones, or even detaching and falling off. This can not only damage goods but also increase safety hazards and cargo loss costs during transportation. In warehouse storage scenarios, when large quantities of cardboard boxes are stacked, their poor stability can easily lead to tilting and collapse, affecting the rational use of warehouse space and causing inconvenience to warehouse management. The root cause of these problems lies in the fact that the structural design of existing cardboard boxes fails to fully consider the stability requirements during stacking. The lack of reliable interlocking and locking mechanisms to achieve a stable connection between upper and lower cardboard boxes makes it difficult for stacked boxes to withstand external forces such as vibration and impact, severely limiting their application in scenarios requiring high stacking stability. Utility Model Content

[0004] This invention provides a double-fixed connection between the upper and lower boxes when they are stacked by setting vertical and horizontal interlocking plates on the box structure, along with slots and limiting holes, thereby alleviating the problems mentioned in the background art.

[0005] The purpose of this utility model is achieved as follows: a stackable cardboard box, comprising a box body folded from a single sheet of cardboard, and further comprising:

[0006] The base plate has two pairs of symmetrically arranged side plates and end plates along its perimeter. The side plates and end plates are foldably connected to the base plate through fold lines.

[0007] The corner plate is connected to both ends of the side plate by fold lines. The outer edge of the corner plate is provided with a locking head, and the locking head is provided with a foldable vertical interlocking structure. The bottom plate is provided with a limiting hole that matches the locking head. When the boxes are stacked, the vertical interlocking structure unfolds and forms an interlock after the locking head is inserted into the limiting hole.

[0008] The horizontal buckle is connected to the inner edge of the corner plate via a fold line, and the end plate corresponding to the corner plate is provided with a slot that matches the horizontal buckle.

[0009] The present invention is further configured such that an insertion groove is provided between the corner plate and the corresponding end plate, the insertion groove providing insertion space for the card head and the vertical interlocking structure when the box is stacked.

[0010] The present invention is further configured such that the vertical engagement structure is a vertical engagement plate located on the outer edge of the card head, and the vertical engagement plate achieves folding and unfolding before and after insertion through symmetrically arranged folding lines.

[0011] The present invention is further configured such that the transverse buckle is provided with a transverse interlocking plate, and the transverse interlocking plate is folded and unfolded before and after being inserted into the card slot by symmetrically arranged folding lines.

[0012] The present invention is further configured such that after the transverse buckle and the slot are locked, the side plate and the end face are fixed together by adhesive.

[0013] The present invention is further provided that the lower surface of the base plate is provided with an anti-slip layer.

[0014] The present invention is further configured such that the box body is made of corrugated cardboard, and the corrugation direction of the corrugated cardboard is arranged at a 45° angle.

[0015] The present invention is further provided that at least one of the bottom plate, side plate and end plate is provided with a vent hole.

[0016] By adopting the above technical solution, the beneficial effects that this utility model can achieve are:

[0017] 1. By using the clips and vertical interlocking structure on the outer edge of the corner plate to cooperate with the limiting holes on the bottom plate, the vertical interlocking structure unfolds after the clips are inserted into the limiting holes to form an interlock, while the horizontal buckle locks with the end plate slot, achieving dual vertical and horizontal fixation of the upper and lower boxes, significantly improving the stability of the stacked connection.

[0018] 2. The insertion slot between the corner plate and the end plate provides guidance and accommodation space for the snap-fit ​​head and vertical interlocking structure, avoiding structural interference when stacked, ensuring smooth cooperation of connecting parts, and enhancing assembly convenience.

[0019] 3. After the horizontal buckle and slot are locked, the side plate and end plate are fixed with adhesive to form a double reinforcement of structural bonding and mechanical buckle, which prevents the folded connection from loosening due to external force vibration and improves the overall structural rigidity. Attached Figure Description

[0020] Figure 1 This is a front view of the utility model in its unfolded state;

[0021] Figure 2 This is a utility model Figure 1 A magnified structural diagram of part A;

[0022] Figure 3 This is a three-dimensional structural diagram of the first folded state of this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the second folded state of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the stacked state of this utility model.

[0025] The attached diagram is labeled as follows: 1. Box body; 2. Base plate; 3. Side plate; 4. End plate; 5. Folding line; 6. Corner plate; 7. Clip; 8. Vertical interlocking structure; 80. Vertical interlocking plate; 9. Limiting hole; 10. Horizontal buckle; 11. Slot; 12. Insertion slot; 13. Horizontal interlocking plate; 14. Adhesive; 15. Anti-slip layer; 16. Corrugated cardboard; 17. Corrugation direction; 18. Ventilation hole. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-5 :

[0027] Example 1:

[0028] This embodiment provides a stackable cardboard box, including a box body 1 formed by folding a single piece of cardboard, and further including:

[0029] The base plate 2 has two pairs of symmetrically arranged side plates 3 and end plates 4 along its periphery. The side plates 3 and end plates 4 are foldably connected to the base plate 2 through fold lines 5.

[0030] Angle plate 6 is connected to both ends of side plate 3 via folding line 5. An outer edge of angle plate 6 is provided with a locking head 7. The locking head 7 is provided with a foldable vertical interlocking structure 8. The bottom plate 2 is provided with a limiting hole 9 that matches the locking head 7. When the boxes 1 are stacked, the vertical interlocking structure 8 unfolds and forms an interlock after the locking head 7 is inserted into the limiting hole 9.

[0031] The horizontal buckle 10 is connected to the inner edge of the corner plate 6 via the fold line 5. The end plate 4 corresponding to the corner plate 6 is provided with a slot 11 that is adapted to the horizontal buckle 10.

[0032] The base plate 2 serves as the bottom of the box body 1, providing support and bearing the weight of the items inside the box. It is also one of the key components for achieving stacking connections. The base plate 2 is generally a rectangular flat plate structure, which can be folded and connected to the side plates 3 and end plates 4 via fold lines 5. It is equipped with limiting holes 9 that match the corner plate 6 clips 7 for positioning and connection during stacking.

[0033] Side panels 3 and end panels 4 enclose the sides and ends of the box 1, protecting the contents and contributing to the stacking connection structure. Side panels 3 and end panels 4 are typically rectangular plate structures, symmetrically arranged along the perimeter of the base plate 2, and connected to the base plate 2 via fold lines 5, allowing them to be folded to form the three-dimensional box 1. End panels 4 have slots 11 that mate with the lateral latches 10 for lateral connection during stacking.

[0034] The corner plate 6 is the core component for achieving the stacking connection of the boxes 1. It enhances stacking stability by cooperating with other components. The corner plate 6 is generally a plate-shaped structure with an approximate right-angled trapezoid. It is connected to both ends of the side plate 3 by fold lines 5. It has a locking head 7 on the outer edge and a transverse buckle 10 on the inner edge. The locking head 7 cooperates with the limiting hole 9 of the bottom plate 2, and the transverse buckle 10 cooperates with the slot 11 of the end plate 4.

[0035] The locking head 7 is used to insert into the limiting hole 9 of the base plate 2 to achieve vertical positioning and initial connection when the boxes 1 are stacked. The locking head 7 is a structure that protrudes from the outer edge of the corner plate 6, and its shape is usually rectangular or trapezoidal, which facilitates insertion into the limiting hole 9. The locking head 7 is integrally formed with the corner plate 6, and after being inserted into the limiting hole 9, it is further fixed by the vertical interlocking structure 8.

[0036] The vertical interlocking structure 8 unfolds after the card head 7 is inserted into the limiting hole 9, and interlocks with the inner wall of the limiting hole 9 to prevent the box body 1 from separating vertically and enhance vertical stability.

[0037] The limiting hole 9 cooperates with the clip 7 to provide an insertion position for the clip 7, realize the vertical positioning when the boxes 1 are stacked, and provide working space for the vertical interlocking structure 8. The limiting hole 9 is a hole opened on the base plate 2, and its shape matches the clip 7. Its shape is usually rectangular or trapezoidal, etc., corresponding to the shape of the clip 7.

[0038] The horizontal buckle 10 engages with the slot 11 on the end plate 4 to achieve lateral fixation of the box 1 when stacked, preventing the box 1 from sliding left, right, or back and forth. The horizontal buckle 10 is a plate-shaped structure connected to the inner edge of the corner plate 6 by the fold line 5. Its shape is adapted to the slot 11. After being inserted into the slot 11 of the end plate 4, the horizontal interlocking plate 13 unfolds and fixes the box.

[0039] When stacking cardboard boxes, first align the corner plate 6 and clip 7 of the upper cardboard box with the limiting hole 9 of the bottom plate 2 of the lower cardboard box and insert it. During insertion, the vertical interlocking structure 8 on the clip 7 is folded to facilitate smooth insertion. After the clip 7 is fully inserted into the limiting hole 9, the vertical interlocking structure 8 unfolds through the fold line 5 and tightly interlocks with the inner wall of the limiting hole 9, achieving vertical positioning and initial fixation of the upper and lower cardboard boxes.

[0040] Next, the transverse latches 10 on the inner edge of the corner plate 6 are inserted into the slots 11 on the corresponding end plate 4. During insertion, the transverse interlocking plates 13 of the transverse latches 10 are folded. After insertion, the transverse interlocking plates 13 unfold through the fold line 5 and engage with the inner wall of the slot 11, thereby achieving lateral fixation of the upper and lower layers of cardboard boxes. Through the dual fixing effect of the vertical interlocking structure 8 and the transverse latches 10, the multi-layer cardboard boxes are tightly connected when stacked, forming a stable stacking structure, effectively preventing the cardboard boxes from separating vertically, horizontally, or sliding forward or backward during storage and transportation.

[0041] Example 2:

[0042] This embodiment provides a stackable cardboard box, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0043] An insertion slot 12 is provided between the corner plate 6 and the corresponding end plate 4. The insertion slot 12 provides insertion space for the clip 7 and the vertical interlocking structure 8 when the box body 1 is stacked.

[0044] In the structural design of stackable cardboard boxes, an insertion slot 12 is provided between the corner plate 6 and the corresponding end plate 4. This slot is designed to provide precise and adaptable space for the locking head 7 and the vertical interlocking structure 8 when the boxes 1 are stacked. When stacking cardboard boxes, the locking head 7 needs to be inserted into the limiting hole 9 of the bottom plate 2. If the insertion slot 12 is not provided, the locking head 7 and the vertical interlocking structure 8 may not be able to be inserted smoothly due to the obstruction of the end plate 4, or they may be squeezed and deformed during the insertion process, affecting the connection effect. The existence of the insertion slot 12 serves two purposes: firstly, it guides the insertion path of the locking head 7, ensuring that it can be accurately aligned with the limiting hole 9; secondly, it provides sufficient space for the vertical interlocking structure 8 to fold, insert, and unfold, avoiding structural interference due to insufficient space. This ensures that the vertical connection structure can function reliably and efficiently when the upper and lower cardboard boxes are stacked, significantly improving the convenience of stacking operations and the stability of the connection.

[0045] Example 3:

[0046] This embodiment provides a stackable cardboard box, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0047] The vertical engagement structure 8 is a vertical engagement plate 80 located on the outer edge of the card head 7. The vertical engagement plate 80 is folded and unfolded before and after insertion through symmetrically arranged folding lines 5.

[0048] In the design of stackable cardboard boxes, the vertical interlocking structure 8 is set as a vertical interlocking plate 80 on the outer edge of the latch 7, and folding and unfolding are achieved through symmetrical folding lines 5. The purpose is to construct a flexible and stable vertical connection mechanism. When the boxes 1 are stacked, the vertical interlocking plate 80 can be folded through the folding lines 5 before insertion to reduce the volume and facilitate the smooth insertion of the latch 7 into the limiting hole 9 of the bottom plate 2. After insertion, the vertical interlocking plate 80 unfolds using the folding lines 5 and fits tightly against the inner wall of the limiting hole 9 to form an interlock, thereby limiting the relative separation of the upper and lower boxes 1 and enhancing the vertical stability of the stacked structure. This foldable and unfoldable design not only reduces the assembly difficulty and ensures the smoothness of the insertion process, but also forms a reliable locking effect after insertion, effectively preventing the cardboard boxes from shifting or detaching due to external forces in the stacked state, thus improving the practicality and reliability of cardboard box stacking.

[0049] Example 4:

[0050] This embodiment provides a stackable cardboard box, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0051] The transverse buckle 10 is provided with a transverse interlocking plate 13, which is folded and unfolded before and after being inserted into the card slot 11 by symmetrically arranged folding lines 5.

[0052] In the structural design of stackable cardboard boxes, a transverse interlocking plate 13 is provided on the transverse buckle 10, which can be folded and unfolded through symmetrical folding lines 5. Its core purpose is to enhance the transverse stability and assembly convenience of the box body 1 when stacked. When stacking cardboard boxes, the transverse interlocking plate 13 can be folded along the folding line 5 before being inserted into the slot 11 of the end plate 4, reducing the overall volume of the transverse buckle 10 and making it easy to insert into the slot 11. After being inserted into place, the transverse interlocking plate 13 unfolds using the folding line 5 and tightly engages with the inner wall of the slot 11, constraining the upper and lower box bodies 1 in the transverse direction and preventing them from sliding relative to each other in the left and right or forward and backward. This design not only makes the installation process of the transverse buckle 10 smoother and more efficient, without the need for complicated operations and tools, but also forms a firm transverse locking structure after insertion. Together with the vertical interlocking structure 8, it achieves multi-dimensional stable fixation of the box body 1, significantly improving the overall stability of the cardboard boxes after stacking and effectively coping with bumps and vibrations during warehousing and transportation.

[0053] Example 5:

[0054] This embodiment provides a stackable cardboard box, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] After the transverse buckle 10 and the slot 11 are locked, the side plate 3 and the end face are fixed together by adhesive 14.

[0056] In the structural design of stackable cardboard boxes, after the transverse latches 10 and slots 11 are locked, adhesive 14 is used to fix the side panels 3 and end faces, aiming to construct a dual reinforcement system combining mechanical latches and chemical bonding. While the mechanical connection formed by the transverse latches 10 and slots 11 provides initial positioning and constraint between the box bodies 1, slight loosening may still occur under complex working conditions such as long-term vibration and external impact. The use of adhesive 14 fills the tiny gaps at the connection between the side panels 3 and the end faces, allowing them to adhere tightly and form a continuous adhesive surface. This enhances the interfacial bonding force at the molecular level, effectively suppressing structural displacement caused by gaps in the mechanical connection. This synergistic effect of mechanical locking and chemical bonding not only improves the overall rigidity and fatigue resistance of the connection parts of the box bodies 1, but also further strengthens the stability of the stacked structure, ensuring that the cardboard box maintains a reliable form throughout the entire process of warehousing and transportation, reducing the risk of packaging failure, and providing more durable and stable protection for the contents.

[0057] Example 6:

[0058] This embodiment provides a stackable cardboard box, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0059] The lower surface of the base plate 2 is provided with an anti-slip layer 15.

[0060] In the design of stackable cardboard boxes, an anti-slip layer 15 is set on the lower surface of the base plate 2. Its core purpose is to enhance the friction between the cardboard box and the supporting surface, preventing the bottom cardboard box from sliding or shifting due to external forces during stacking, and even causing the entire stacked structure to tip over. This improves the stability and safety of the cardboard box during storage and transportation. The selection of materials for the anti-slip layer 15 requires comprehensive consideration of friction performance, durability, cost, and environmental friendliness. Common choices include rubber, which has high elasticity and strong friction, and can closely conform to supporting surfaces of different textures; silicone, which is heat-resistant and wear-resistant, and suitable for various complex environments; in addition, an anti-slip coating with a textured surface can be used, which improves the anti-slip effect by increasing the roughness of the contact surface. This type of coating is low-cost and easy to mass-produce, meeting the design requirements of lightweight and low-cost cardboard boxes while ensuring anti-slip function.

[0061] Example 7:

[0062] This embodiment provides a stackable cardboard box, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0063] The box body 1 is made of corrugated cardboard 16, and the corrugation direction 17 of the corrugated cardboard 16 is arranged at a 45° angle.

[0064] The box body 1 is made of corrugated cardboard 16 with the corrugation direction 17 arranged at a 45° angle, which aims to improve the mechanical properties and usability of the box by optimizing the cardboard structure. Compared with the traditional vertical or horizontal arrangement of the corrugation direction 17, the 45° angled arrangement of the corrugated cardboard 16 can more evenly distribute the stacking pressure, converting the vertical pressure into components in multiple directions when under stress, avoiding stress concentration in a certain local area, thereby effectively improving the box's compressive strength and deformation resistance. At the same time, this special arrangement also enhances the cardboard's toughness in the transverse and longitudinal directions, giving the box body 1 better cushioning and resilience when facing external forces such as squeezing and collisions during warehousing and transportation. This protects the contents from damage, extends the box's service life, and improves the reliability and practicality of the packaging.

[0065] Example 8:

[0066] This embodiment provides a stackable cardboard box, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0067] At least one of the base plate 2, side plate 3 and end plate 4 is provided with a vent hole 18.

[0068] Ventilation holes 18 are provided in the base plate 2, side plates 3, and end plates 4 of the stackable cardboard box, primarily to meet the packaging needs of items requiring special air circulation. For goods such as food and medicine that are susceptible to spoilage due to humidity and gases, the ventilation holes 18 promote the exchange of air between the box and the outside environment, preventing moisture condensation, odor accumulation, or gas concentration imbalance caused by a sealed environment, thereby avoiding mold, spoilage, or chemical reactions. Furthermore, the ventilation hole 18 design can also reduce the pressure difference caused by temperature changes inside the cardboard box to a certain extent, reducing the risk of damage to the packaging during transportation due to pressure fluctuations, effectively ensuring product quality and packaging integrity, and expanding the applicability of cardboard boxes in more types of product packaging.

[0069] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A stackable carton comprising a carton body (1) formed by folding a single piece of paperboard, characterised in that It also includes: The base plate (2) has two pairs of symmetrically arranged side plates (3) and end plates (4) along its periphery. The side plates (3) and end plates (4) are foldably connected to the base plate (2) through fold lines (5). Angle plate (6) is connected to both ends of side plate (3) by folding line (5). An outer edge of angle plate (6) is provided with a clip (7). The clip (7) is provided with a foldable vertical interlocking structure (8). The bottom plate (2) is provided with a limiting hole (9) that matches the clip (7). When the boxes (1) are stacked, the vertical interlocking structure (8) unfolds and forms an interlock after the clip (7) is inserted into the limiting hole (9). The horizontal buckle (10) is connected to the inner edge of the corner plate (6) via the fold line (5), and the end plate (4) corresponding to the corner plate (6) is provided with a slot (11) that is compatible with the horizontal buckle (10).

2. A stackable carton according to claim 1 wherein, An insertion slot (12) is provided between the corner plate (6) and the corresponding end plate (4). The insertion slot (12) provides an insertion space for the clip (7) and the vertical interlocking structure (8) when the box (1) is stacked.

3. A stackable carton according to claim 1 wherein, The vertical engagement structure (8) is a vertical engagement plate (80) located on the outer edge of the card head (7). The vertical engagement plate (80) is folded and unfolded before and after insertion by symmetrically arranged folding lines (5).

4. A stackable carton according to claim 1 wherein, The transverse buckle (10) is provided with a transverse interlocking plate (13), which is folded and unfolded before and after being inserted into the slot (11) by symmetrically arranged folding lines (5).

5. A stackable carton according to claim 1 wherein, After the transverse buckle (10) and the slot (11) are locked, the side plate (3) and the end face are fixed together by adhesive (14).

6. A stackable carton according to claim 1 wherein, The lower surface of the base plate (2) is provided with an anti-slip layer (15).

7. A stackable carton according to claim 1 wherein, The box body (1) is made of corrugated cardboard (16), and the corrugation direction (17) of the corrugated cardboard (16) is arranged at a 45° angle.

8. A stackable carton according to claim 1 wherein, At least one of the base plate (2), side plate (3) and end plate (4) is provided with a vent hole (18).

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