Portable three-dimensional folding paper holder for fragile products

Abstract

The utility model discloses a portable three-dimensional folding paper support for fragile products. The upper-layer paperboard and the lower-layer paperboard are folded through a plurality of transverse creases, and the two ends of the upper-layer paperboard and the two ends of the lower-layer paperboard are bonded. A plurality of round, oval, square, rectangular or special-shaped storage grooves are formed in the upper-layer paper board at intervals and used for containing objects. The lower-layer paperboard is provided with at least one folding lining frame which is composed of a pre-pressing crease and a pre-cutting mark, a second bonding part between the pre-pressing crease and the pre-cutting mark is bonded with the inner side face of the upper-layer paperboard, a vertical supporting plate can be formed when the folding lining frame is unfolded, and the supporting strength is enhanced. In addition, reinforcing edges or auxiliary supporting faces can be reserved at the two ends of the upper-layer paperboard, and the supporting performance of the paper holder is further improved through operations such as folding and folding. The paper support is convenient to transport and store, can be conveniently folded, unfolded and formed and has the characteristics of buffering, damping, attractive appearance and environmental protection, patterns, characters and brand LOGO can be printed on the front face of the upper-layer paper board, diversified packaging requirements of enterprises are met, and the product grade and the brand image are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of paper box packaging liners or inner trays, and is used in the paper box packaging of all products that are designed to prevent collisions, such as pharmaceuticals, wines, porcelain, glass, and spare parts. It plays a role in cushioning and protecting the products from collisions during transportation; specifically, it is a convenient three-dimensional folding paper tray for fragile items. Background Technology

[0002] In today's product packaging industry, inner trays for packaging boxes are widely used in the packaging process of various products as key components for protecting products and improving packaging integrity. Taking paper boxes containing glass medicines and small glasses of wine as examples, an inner tray is usually needed at the bottom to stabilize the product. In the past and present mainstream technical solutions, foam, pearl cotton, and plastic trays are the most common choices.

[0003] These traditional plastic trays have revealed numerous problems in practical applications. From an environmental perspective, foam is difficult to degrade naturally, persists in the environment for a long time, and poses a potential threat to ecosystems such as soil and water sources. Plastic trays also face degradation challenges; the accumulation of large quantities of discarded plastic trays not only occupies land resources, but incineration also produces harmful gases and pollutes the air. While pearl cotton has a slight advantage over the former two, it still takes a long time to decompose in the natural environment. Overall, none of them align with the current green and environmentally friendly development philosophy.

[0004] In terms of cost, the production costs of foam, pearl cotton, and plastic trays are relatively high. On the one hand, raw material prices are relatively expensive, and with the increasing scarcity of resources, prices are trending upward; on the other hand, the additional costs of energy consumption and equipment maintenance during the production process are also considerable. For companies that need to package large quantities of goods, the long-term use of these inner trays undoubtedly adds a heavy economic burden.

[0005] From a warehousing and transportation perspective, traditional foam, pearl cotton, and plastic pallets cannot be folded, resulting in a high volume ratio, which leads to high transportation efficiency and warehouse occupancy rate, and also increases warehousing and transportation costs.

[0006] These traditional inner trays also have significant drawbacks in product display and marketing. Due to the characteristics of their material, they cannot be directly printed with colors and patterns. In today's highly competitive market, product packaging must not only provide protection but also attract consumers' attention and convey brand information. The inability to print on them renders the inner trays ineffective in product promotion, limiting the overall creativity and marketing impact of the packaging. Summary of the Invention

[0007] To address the shortcomings and defects of the existing technology, the inventors, through research and development, have provided a paper tray with strong support, facilitating transportation and storage, easy folding and unfolding, and providing cushioning, shock absorption, and an aesthetically pleasing and environmentally friendly packaging box inner tray. Furthermore, it allows businesses to customize the paper tray with colors, patterns, logos, etc., to enhance product quality and brand image. Specifically, this paper tray is designed as follows:

[0008] A convenient three-dimensional folding paper tray for fragile items is made from a single piece of cardboard pre-cut into shape: several transverse creases, which run transversely through the cardboard to assist in folding into an upper and lower cardboard layer and form a first adhesive part at both ends. By bonding the first adhesive part and folding, a double-layer three-dimensional tray can be formed; several storage slots, which are hollowed out and spaced apart on the upper cardboard layer, are used to hold items; at least one folding inner frame, which consists of two pre-pressed creases and pre-cutting creases. A second adhesive part is formed between the parallel and adjacent pre-cutting creases and pre-pressed creases. The second adhesive part is bonded to the inner side of the upper cardboard layer, so that when the upper and lower cardboard layers are unfolded, the second adhesive part is pulled up along with the upper cardboard layer. The two pre-pressed creases are perpendicular to the upper and lower cardboard layers, forming a vertical support plate.

[0009] Furthermore, the pre-cut marks are provided with shaped edges that match the shape or edge shape of the storage slot, so that the second adhesive part does not obstruct the storage slot after bonding.

[0010] Furthermore, the storage slot can be a circular hole, an elliptical hole, a square hole, a rectangular hole, or an irregularly shaped hole.

[0011] Furthermore, when there are 2-3 sets of folded inner lining frames, they are arranged in parallel side by side or staggered and evenly distributed.

[0012] Furthermore, the upper cardboard has reinforcing edges and a first longitudinal crease at both ends. The reinforcing edges can be folded inward along the first longitudinal crease and adhered to the inner side of the upper cardboard to increase the edge strength of the upper cardboard.

[0013] Furthermore, the upper cardboard has auxiliary support surfaces and second longitudinal creases reserved at both ends. The width of the auxiliary support surfaces is equivalent to the depth of the gap between the upper and lower cardboard after the paper tray is formed. After the paper tray is formed, the auxiliary support surfaces are perpendicular to the upper and lower cardboard, providing vertical support.

[0014] Furthermore, patterns, text, and / or brand logos are printed on the front side of the upper cardboard.

[0015] Furthermore, the cardboard is corrugated cardboard or cardboard.

[0016] The working principle of this invention is as follows: Before folding, the cardboard is in the shape of a long strip with four transverse creases pre-pressed along its length. There are two creases in the middle and one each near the top and bottom edges. The distance between the two middle creases determines the thickness of the folded paper tray. The top and bottom creases are folded and then joined together. Several storage slots are cut into the upper cardboard. The lower cardboard has a semi-adhesive folded inner frame after die-cutting. The folded inner frame has pre-pressed creases, which are the connecting parts of the cardboard. These are two parallel pre-pressed creases, with the distance between them matching the thickness of the folded paper tray. The area between the pre-pressed creases and the pre-cutting marks is the second bonding area, used to bond to the bottom surface of the upper cardboard. After bonding the first and second bonding areas, the upper and lower cardboard are pressed together along the middle transverse crease to form a stacked structure, ready for shipment. When packing, simply fold and pull apart the upper and lower cardboard layers. With the help of the horizontal creases, it unfolds into a three-dimensional paper tray. During unfolding, the folded inner frame is adhered to the upper cardboard by the second adhesive part. As the upper cardboard unfolds and moves upward, the folded inner frame is pulled up by the pre-pressed creases, forming a support structure perpendicular to the upper and lower cardboard layers. This structure effectively enhances the support strength of the three-dimensional paper tray. The unfolded paper tray can then be placed at the bottom of the carton, and the items to be packed can be placed into the storage slots to complete the packaging. In a preferred embodiment, the number of folded inner frames is not fixed; it can be two, three, or even more sets, forming a more uniform support area and further strengthening the overall support of the paper tray. In another preferred embodiment, reinforcing edges can be provided on both sides of the upper cardboard, which are folded and glued to the bottom of the upper cardboard to form a double-layer cardboard edge structure, further enhancing the support strength. Preferably, the reinforcing edges on both sides of the upper cardboard are replaced with foldable auxiliary support surfaces, which are folded and inserted vertically into the carton, with their bottom edges contacting the bottom surface of the carton. This also provides vertical support to the upper cardboard, thereby enhancing the overall support strength of the paper tray.

[0017] The beneficial technical effects of this utility model are as follows:

[0018] (1) It has a good paper support structure. Through the unique folding inner frame design, when the paper tray is unfolded, the support plate formed by the pre-pressed creases is perpendicular to the upper and lower cardboard. With the reasonable layout of multiple sets of folding inner frames, such as parallel side by side or staggered and evenly arranged, it can effectively enhance the support strength of the three-dimensional paper tray. The reinforcing edges set on both sides of the upper cardboard are folded and glued to form a double-layer cardboard edge structure, as well as replaceable auxiliary support surfaces. After being inserted into the carton, they provide vertical support to the upper cardboard, comprehensively improving the overall support strength of the paper tray from multiple dimensions and better protecting fragile items.

[0019] (2) The convenience of paper trays: Before folding, the paper tray is a long strip of cardboard. The upper and lower cardboard layers can be pressed together along the horizontal fold lines, which greatly reduces the volume, making it convenient for transportation and storage, and saving space and costs. When packing, the upper and lower cardboard layers can be simply folded and pulled apart, and the paper tray can be quickly unfolded into the required three-dimensional shape by means of the horizontal fold lines. The operation is simple and efficient, which greatly improves the packaging efficiency.

[0020] (3) Emphasizing personalization and environmental friendliness, the packaging uses corrugated cardboard or cardboard as raw materials, which are widely available and recyclable, aligning with environmental protection principles. Furthermore, patterns, text, and brand logos can be printed on the front of the upper cardboard layer, enhancing the product's aesthetic appeal and promoting the company's brand through packaging, thereby elevating the product's grade and brand image. The storage slots can be designed with various shapes such as round, oval, square, rectangular, or irregular holes, adapting to the shape and size of different fragile items to meet diverse packaging needs and ensure stable placement of items. Attached Figure Description

[0021] Figure 1 A die-cutting diagram of a cardboard structure for a convenient three-dimensional folding paper tray for fragile items;

[0022] Figure 2 A three-dimensional diagram of the structure of a convenient three-dimensional folding paper tray for fragile items, unfolded into a paper tray;

[0023] Figure 3 A schematic diagram illustrating the usage of a convenient three-dimensional folding paper tray for fragile items;

[0024] Figure 4 A die-cutting diagram for a cardboard structure with two sets of folding inner lining frames;

[0025] Figure 5 A schematic diagram of the folding structure of a cardboard structure with two sets of folding inner frames;

[0026] Figure 6 A three-dimensional view of a paper tray structure after the cardboard is formed, with two sets of folding inner lining frames;

[0027] Figure 7 This is a die-cutting diagram of the cardboard structure with reinforced edges in Example 2;

[0028] Figure 8 This is a perspective view of the paper tray structure with reinforced edges in Example 2;

[0029] Figure 9 This is a die-cutting diagram of the cardboard structure with auxiliary support surface in Example 2;

[0030] Figure 10 This is a perspective view of the paper tray structure with auxiliary support surface in Example 2;

[0031] Wherein: 1—upper cardboard, 2—lower cardboard, 3—transverse crease, 31—first adhesive part, 11—storage slot, 21—folded inner lining frame, 22—pre-press crease, 23—pre-cut crease, 24—second adhesive part, 25—support plate, 4—reinforcing edge, 41—first longitudinal crease, 5—auxiliary support surface, 51—second longitudinal crease. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0033] Example 1: As Figure 1-4 As shown, the die-cut cardboard is long and narrow, with four transverse creases 3 pre-pressed along its length: two in the middle and one near each of the top and bottom edges. The upper cardboard 1 has several spaced storage slots 11 cut out, which can be circular, oval, square, rectangular, or irregularly shaped to accommodate different fragile items. The lower cardboard 2, after die-cutting, has a semi-adhesive folded inner frame 21. The folded inner frame 21 consists of two parallel pre-pressed creases 22 and adjacent pre-cut creases 23. The spacing between the pre-pressed creases 22 is consistent with the thickness of the folded cardboard tray. The area between the pre-pressed creases 22 and the pre-cut creases 23 is the second adhesive portion 24. The upper cardboard 1 also has reinforcing edges 4 and a first longitudinal crease 41, or auxiliary support surfaces 5 and a second longitudinal crease 51 pre-reserved at both ends. After the glue is applied by machine, the first bonding part 31 and the second bonding part 24 are bonded together. The upper cardboard 1 and the lower cardboard 2 are pressed down along a transverse fold 3 in the middle, so that the two are stacked. At this time, the volume of the paper tray is greatly reduced, which facilitates transportation and storage.

[0034] When packing fragile items, hold the upper cardboard 1 and the lower cardboard 2 with both hands and fold them back and forth. With the assistance of the transverse crease 3, the cardboard tray can unfold smoothly into a three-dimensional shape. During unfolding, because the second adhesive part 24 is bonded to the inner side of the upper cardboard 1, the folded inner lining frame 21 moves upward with the upper cardboard 1. The portion between its two pre-pressed creases 22 is pulled up perpendicular to the upper cardboard 1 and the lower cardboard 2, forming a vertically upward support plate 25 structure, which is securely placed between the upper and lower cardboard 2. Figure 4-6As shown, if there are 2-3 sets of folded inner lining frames 21, they will be arranged in a parallel or staggered manner to enhance the support strength of the paper tray. Place the folded and unfolded three-dimensional paper tray smoothly into the bottom of the carton, and according to the shape of the fragile items, place them into the corresponding storage slots 11. Handle with care during placement to ensure the items are stable within the storage slots 11. After placing the items, subsequent carton sealing and other operations can be performed to complete the entire packaging process for fragile items.

[0035] Example 2: Based on Example 1, as follows Figure 7 , 8 As shown, the upper cardboard 1 preferably has pre-reserved reinforcing edges 4 at both ends. These reinforcing edges 4 can be folded inwards along the first longitudinal crease 41, adhering to the inner surface of the upper cardboard 1, thus increasing the edge strength of the upper cardboard 1 and further enhancing the overall support performance of the paper tray. By folding the reinforcing edges 4 inwards along the first longitudinal crease 41 and adhering them to the inner surface of the upper cardboard 1, a double-layer cardboard structure is formed at the edge of the paper tray. From a mechanical perspective, the double-layer structure significantly increases the thickness and rigidity of the edge. When the paper tray is subjected to external forces, such as bumps or compression during transportation, the area where the reinforcing edges 4 are located can better distribute the pressure and effectively resist deformation. Compared to a single-layer cardboard edge, the double-layer structure significantly improves bending resistance, providing a more stable support base for the upper cardboard 1, thereby enhancing the overall load-bearing capacity of the paper tray and better protecting fragile items placed in the storage slot 11. Different fragile items have varying weights and shapes, and their support requirements for the paper tray also differ. The reinforced edge 4 design gives the paper tray greater adaptability. For heavier, fragile items, the reinforced edge can withstand greater vertical pressure, preventing the paper tray edge from collapsing due to product weight and ensuring items are placed stably. For irregularly shaped fragile items, uneven forces may be exerted on the paper tray edge during placement. The reinforced edge 4 effectively addresses this situation, maintaining the overall structural stability of the paper tray and expanding the range of products the paper tray is suitable for.

[0036] Example 3: Based on Example 1, such as Figure 9 , 10As shown, the upper cardboard 1 preferably has pre-reserved auxiliary support surfaces 5 at both ends. Folding it along the second longitudinal crease 51 makes the auxiliary support surfaces 5 perpendicular to the upper cardboard 1 and the lower cardboard 2. After the paper tray is placed in the carton, the bottom edge of the auxiliary support surface 5 contacts the bottom surface of the carton, providing vertical support for the upper cardboard 1 and enhancing the overall support strength of the paper tray. While providing vertical support for the upper cardboard 1, the auxiliary support surface 5 also positively impacts the overall structural rigidity of the paper tray. It connects with the upper cardboard 1 and the lower cardboard 2 to form a more stable overall frame. When the paper tray is subjected to external forces from the side or other directions, the auxiliary support surface 5 can work together with the upper and lower cardboard 2 to resist deformation, enhancing the paper tray's resistance to torsion. For example, during handling, if the carton is subjected to side pressure, the auxiliary support surface 5 can distribute and transfer the side pressure to the entire paper tray structure through its own rigidity and connection with the upper and lower cardboard layers 2, avoiding deformation of the paper tray due to excessive local stress, ensuring that fragile items placed in the storage slot 11 will not be damaged due to changes in the paper tray structure, and further improving the reliability of the paper tray in complex transportation environments.

[0037] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A convenient three-dimensional folding paper tray for fragile items, made from a single sheet of cardboard pre-cut and formed, characterized in that: Several transverse creases (3) are transversely penetrating the cardboard to assist in folding into an upper cardboard (1) and a lower cardboard (2) and forming a first adhesive part (31) at both ends. After bonding and folding the first adhesive part (31), a double-layer three-dimensional bracket can be formed. Several storage slots (11) are perforated and spaced apart on the upper cardboard (1) for holding items; At least one folding inner frame (21) is composed of two pre-pressed creases (22) and pre-cutting creases (23). A second adhesive portion (24) is formed between the parallel and adjacent pre-cutting creases (23) and the pre-pressed creases (22). The second adhesive portion (24) is bonded to the inner side of the upper cardboard (1) so that when the upper cardboard (1) and the lower cardboard (2) are unfolded, the second adhesive portion (24) is pulled up along with the upper cardboard (1). The two pre-pressed creases (22) are perpendicular to the upper cardboard (1) and the lower cardboard (2) to form a vertical support plate (25).

2. The portable, three-dimensional, folding paper carton of claim 1, wherein, The pre-cutting groove (23) has a shaped edge that matches the shape or edge shape of the storage groove (11), so that after bonding, the second bonding part (24) does not cover the storage groove (11).

3. The portable, three-dimensional, folding paper carton of claim 1, wherein, The storage slot (11) is a circular hole, an elliptical hole, a square hole, a rectangular hole, or an irregularly shaped hole.

4. The portable, three-dimensional, folding paper carton of claim 1, wherein, When there are 2-3 sets of the folded inner lining frame (21), they are arranged in parallel side by side or staggered and evenly distributed.

5. The portable, three-dimensional, folding paper carton of claim 1, wherein, The upper cardboard (1) has a reinforcing edge (4) and a first longitudinal crease (41) at both ends. The reinforcing edge (4) can be folded inward along the first longitudinal crease (41) and glued to the inner side of the upper cardboard (1) to increase the edge strength of the upper cardboard (1).

6. The portable, three-dimensional, folding paper carton of claim 1, wherein, The upper cardboard (1) has an auxiliary support surface (5) and a second longitudinal crease (51) reserved at both ends. The width of the auxiliary support surface (5) is equivalent to the depth of the gap between the upper cardboard (1) and the lower cardboard (2) after the paper tray is formed. After the paper tray is formed, the auxiliary support surface (5) is perpendicular to the upper cardboard (1) and the lower cardboard (2) to provide vertical support.

7. The portable, three-dimensional, folding paper carton of claim 1, wherein, Patterns, text and / or brand logos are printed on the front side of the upper cardboard (1).

8. The portable, three-dimensional, folding paper carton of claim 1, wherein, The cardboard is corrugated cardboard or cardboard.

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