Carton flap reinforcing structure

Abstract

The utility model discloses a kind of carton shake cover reinforcing structures, including the shake cover of paper box body upper end left and right sides;The shake cover is movably connected with paper box body, the front and rear sides of the upper end of paper box body are movably connected with battens, the shake cover includes surface paper, paper core and lining paper, the inside of surface paper is equipped with paper core, the inside of paper core is equipped with lining paper, between surface paper and paper core, reinforcing plate is pasted by adhesive, the reinforcing plate is epoxy resin plate, V-shaped groove is arranged in the inside crease of reinforcing plate bottom end, the reinforcing plate of V-shaped groove bottom end is connecting portion, the connecting portion is pasted in the surface paper of paper box body by adhesive, the carton shake cover reinforcing structure, by setting reinforcing plate between surface paper and paper core, and reinforcing plate is epoxy resin plate, by using the high-strength, deformation-resistant characteristics of epoxy resin plate, the overall bending resistance, extrusion resistance of shake cover are enhanced, to prolong the service life of shake cover.

Description

Technical Field

[0001] This utility model belongs to the field of packaging technology, and in particular relates to a reinforced structure for carton flaps. Background Technology

[0002] In the packaging industry, cardboard boxes are widely used due to their low cost and ease of processing. The flap, as a key component of a cardboard box, serves to seal and protect the contents. However, conventional flaps are often simply a combination of face paper, core paper, and liner paper. Their materials and structure limit their strength. During transportation and storage, the flaps are easily deformed or damaged by pressure from items, external impacts, or repeated opening and closing, reducing the box's sealing performance and lifespan, and failing to effectively protect the contents. Furthermore, insufficient reinforcement at the connection between the flap and the box body (creases) makes them prone to breakage due to fatigue from opening and closing. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a reinforced structure for carton flaps. By setting a reinforcing plate between the face paper and the core paper, and the reinforcing plate being an epoxy resin board, the high strength and deformation resistance of the epoxy resin board are utilized to enhance the overall bending and compression resistance of the flap, thereby extending the service life of the flap.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A reinforced flap structure for a cardboard box includes flaps located on the left and right sides of the upper end of the cardboard box body. The flaps are movably connected to the cardboard box body. Lap plates are movably connected to the front and rear sides of the upper end of the cardboard box body. Each flap includes a face paper, a core paper, and a liner paper. The core paper is located inside the face paper, and the liner paper is located inside the core paper. A reinforcing plate, made of epoxy resin, is bonded between the face paper and the core paper using adhesive. A V-groove is formed at the fold on the inner side of the bottom end of the reinforcing plate, and the bottom end of the reinforcing plate at the V-groove serves as a connection point. The connecting part is attached to the face paper of the carton body with adhesive. A reinforcing plate, which is made of epoxy resin, is placed between the face paper and the core. The high strength and deformation resistance of the epoxy resin enhance the overall bending and compression resistance of the flap, thereby extending the service life of the flap. A V-groove is formed at the fold on the inner side of the bottom of the reinforcing plate to form the connecting part. The connecting part is attached to the face paper of the carton body with adhesive. The V-groove disperses the stress at the fold when the flap is opened and closed, reduces fatigue damage, and ensures the reliability of the connection.

[0006] Furthermore, the paper core is a honeycomb paperboard. The honeycomb structure of the paper core can distribute the force and improve the support and compression resistance of the flap.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a reinforcing plate between the face paper and the paper core, and the reinforcing plate is made of epoxy resin board, the high strength and deformation resistance of the epoxy resin board are utilized to enhance the overall bending and compression resistance of the flap, thereby extending the service life of the flap. A V-shaped groove is opened at the fold on the inner side of the bottom end of the reinforcing plate to form a connecting part. The connecting part is pasted to the face paper of the carton body with adhesive. The V-shaped groove disperses the stress at the fold when the flap is opened and closed, reduces fatigue damage, and ensures the reliability of the connection. The paper core is made of honeycomb cardboard, and its honeycomb structure can distribute the force and improve the support and compression resistance of the flap. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model.

[0009] Figure 2 This is a schematic diagram of the cross-sectional structure of the hinged cover of this utility model.

[0010] Figure 3 This is a schematic diagram of the paper core structure of this utility model.

[0011] In the diagram: 1. Carton body, 2. Lap plate, 3. Flip flap, 31. Face paper, 32. Paper core, 33. Liner paper, 4. Reinforcing plate, 5. Connecting part, 6. V-groove. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0013] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0014] See appendix Figure 1-3As shown, a cardboard box flap reinforcement structure includes flaps 3 located on the left and right sides of the upper end of the cardboard box body 1; the flaps 3 are movably connected to the cardboard box body 1, and the front and rear sides of the upper end of the cardboard box body 1 are movably connected to the flaps 2. The flaps 3 include a face paper 31, a paper core 32, and a liner paper 33. The paper core 32 is located inside the face paper 31, and the liner paper 33 is located inside the paper core 32. A reinforcing plate 4 is glued between the face paper 31 and the paper core 32 by an adhesive. The reinforcing plate 4 is an epoxy resin board. A V-groove 6 is formed at the fold on the inner side of the bottom end of the reinforcing plate 4. The bottom end of the reinforcing plate 4 at the V-groove 6 is a connecting... The connecting part 5 is attached to the face paper 31 of the carton body 1 by adhesive. A reinforcing plate 4 is set between the face paper 31 and the paper core 32. The reinforcing plate 4 is made of epoxy resin board. By utilizing the high strength and deformation resistance of epoxy resin board, the overall bending and compression resistance of the flap 3 is enhanced, thereby extending the service life of the flap 3. A V-shaped groove is opened at the fold on the inner side of the bottom end of the reinforcing plate 4 to form the connecting part 5. The connecting part 5 is attached to the face paper of the carton body 1 by adhesive. The V-shaped groove 6 disperses the stress at the fold when the flap 3 is opened and closed, reduces fatigue damage, and ensures the reliability of the connection.

[0015] The paper core 32 is a honeycomb paperboard. The honeycomb structure of the paper core 32 can distribute the force and improve the support and compression resistance of the flap 3.

[0016] Working principle: The flap 3 is composed of a base layer consisting of a face paper 31, a paper core 32, and an inner paper 33. A reinforcing plate 4 is pasted between the face paper 31 and the paper core 32. The reinforcing plate 4 is made of epoxy resin board. By utilizing the high strength and deformation resistance of epoxy resin board, the overall bending and compression resistance of the flap 3 is enhanced. The paper core 32 is made of honeycomb cardboard. Its honeycomb structure can distribute the force and further improve the support and compression resistance of the flap 3. A V-shaped groove is opened at the fold on the bottom inner side of the reinforcing plate 4 to form a connecting part 5. The connecting part 5 is pasted to the face paper of the carton body 1 with adhesive. The V-shaped groove 6 disperses the stress at the fold when the flap 3 is opened and closed, reduces fatigue damage, and ensures the reliability of the connection. During the opening and closing operation, the structure of the V-shaped groove 6 allows the fold to bend flexibly, extending the service life of the flap 3.

[0017] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0018] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cardboard box flap reinforcement structure, comprising flaps located on the left and right sides of the upper end of the cardboard box body, characterized in that: The flap is movably connected to the carton body. The front and rear sides of the upper end of the carton body are movably connected to the flap. The flap includes a face paper, a core paper, and a liner paper. The core paper is located inside the face paper, and the liner paper is located inside the core paper. A reinforcing plate is glued between the face paper and the core paper with an adhesive. The reinforcing plate is made of epoxy resin. A V-shaped groove is formed at the fold on the inner side of the bottom end of the reinforcing plate. The bottom end of the reinforcing plate of the V-shaped groove is a connecting part. The connecting part is glued to the face paper of the carton body with an adhesive.

2. The cardboard box flap reinforcement structure according to claim 1, characterized in that: The paper core is a honeycomb paperboard.

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