High-strength corrugated carton

Abstract

The utility model discloses a high-strength corrugated carton which comprises a carton body and a plurality of side walls forming the outer wall of the carton body. Edges are formed between the adjacent side walls through folding, and the edges are provided with a plurality of sunken parts which are sunken towards the inner cavity of the box body. According to the corrugated carton, due to the synergistic effect of the concave structures of the edges and the built-in supporting rods, the shear deformation resistance of the corrugated carton is fundamentally improved.

Description

Technical Field

[0001] This utility model relates to the field of corrugated cardboard box technology, and in particular to a high-strength corrugated cardboard box. Background Technology

[0002] Corrugated cardboard boxes are the most widely used packaging containers in modern logistics and transportation. Their main structure is usually made of corrugated cardboard that has been die-cut and creasing and folded into a regular cuboid or cube. These traditional boxes mainly rely on the vertical edges formed by the four side walls to provide longitudinal support strength, and the top and bottom of the box are closed by interlocking flaps.

[0003] However, existing rectangular cross-section cardboard boxes have significant structural defects:

[0004] 1. Weak resistance to deformation along the diagonal: When the container is subjected to eccentric loads or external compression (such as stacking tilt or transportation vibration), the force will be transmitted along the diagonal of the container. Due to the geometric instability of the rectangular structure, the edge support system cannot effectively resist shear stress, resulting in parallelogram distortion (i.e., "rhomboid deformation") of the container in the longitudinal section.

[0005] 2. Existing corrugated cardboard boxes achieve the lifting function by setting pull ropes on the cardboard surface. However, due to the limited strength of thin cardboard, when heavy objects are placed inside, the cardboard is prone to deformation and the pull ropes may fall off, affecting the stability when lifting. Utility Model Content

[0006] This invention addresses the shortcomings of existing technologies by providing a high-strength corrugated cardboard box that is resistant to shear deformation.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-strength corrugated cardboard box, comprising a box body and several side walls forming the outer wall of the box body;

[0008] The adjacent sidewalls are folded to form an edge, and the edge is provided with a number of recesses that are recessed into the inner cavity of the box.

[0009] After the recessed portion is recessed, a support hole is formed between it and the side wall. A support rod is provided in the support hole and is arranged parallel to the edge.

[0010] In the above scheme, preferably, the support rod is a round rod, which is formed by rolling or molding rigid cardboard in one piece.

[0011] In the above scheme, preferably, the recessed portion includes a first recessed wall and a second recessed wall after being recessed inward, and a reinforcing ridge is formed between the first recessed wall and the second recessed wall by folding.

[0012] In the above scheme, preferably, the angle between the first recessed wall and the second recessed wall after folding is 80-100°;

[0013] The first recessed wall and the second recessed wall form a rectangular cross section at the junction with the adjacent side wall, and the support hole is a rectangular hole.

[0014] In the above scheme, preferably, the upper end of the support rod abuts against the top wall of the box and the lower end abuts against the bottom wall of the box.

[0015] In the above scheme, preferably, a limiting plate is slidably provided on the support rod, a pull rope is fixed at one end of the support rod, and the other end extends axially along the outer wall of the support rod and is fixedly connected to the limiting plate.

[0016] In the above scheme, preferably, the limiting plate is a rectangular plate, which is slidably disposed on the end of the support rod near the bottom wall and the edge of the limiting plate near the side wall is in sliding fit with the side wall.

[0017] In the above scheme, preferably, one end of the pull rope is connected to the limiting plate, and the other end is synchronously passed through the support hole along with the support rod and then fixedly connected to the side wall of the support rod.

[0018] In the above scheme, preferably, the outer edge of the limiting plate is larger than the outer edge of the recessed section, and an adhesive bladder is provided on the end face near the recessed section. The adhesive bladder is a thin-walled bladder containing adhesive, and the adhesive overflows after being squeezed.

[0019] In the above scheme, preferably, the limiting plate is made of plastic, and the glue bag is fixedly connected to the surface of the limiting plate.

[0020] The beneficial effects of this utility model are: through the synergistic effect of the edge recessed structure and the built-in support rod, this utility model fundamentally improves the shear deformation resistance of corrugated cardboard boxes.

[0021] The reinforcing ridge formed by the folding of the recessed part, together with the support rod, constitutes a triangular support system, which can effectively resist the eccentric load in the diagonal direction, greatly improve the diagonal compressive strength of the box, and significantly suppress the rhomboid distortion phenomenon.

[0022] In addition, the limit plate can be slid to the preset position by pulling the rope, and the tool-free quick bonding and fixing can be achieved by squeezing and breaking the glue bag. This makes it easy to quickly position and fix the rope, while strengthening the bonding strength between the support rod and the box body and improving the stability of the rope lifting.

[0023] This structure maintains the traditional cardboard box folding process, only adding paper-based support rods and injection-molded limiting plates. The overall solution achieves a leapfrog improvement in box rigidity at a relatively low cost, improving the strength of the cardboard box while also reducing costs and increasing efficiency, and greatly improving the production quality of the cardboard box. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0025] Figure 2 This is a schematic diagram of the box structure of this utility model.

[0026] Figure 3 This is a cross-sectional view of the recessed portion of this utility model.

[0027] Figure 4 This is a three-dimensional structural diagram of the support rod of this utility model. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-4 .

[0029] A high-strength corrugated cardboard box includes a box body 1 and several side walls 2 forming the outer wall of the box body 1, such as... Figure 1 As shown, the box 1 is die-cut and consists of four side walls 2. The top and bottom are folded together by folding in half, forming a cuboid or cube box after assembly.

[0030] The adjacent sidewalls 2 are folded together by indentation lines to form four vertical edges 3, such as Figure 2 As shown, in this embodiment, a set of inwardly recessed portions 301 are provided in the middle of each edge 3. The recessed portions 301 are integrally formed on the box plate by a die-cutting and creasing process.

[0031] The recessed portion 301 is formed by folding the first recessed wall 304 and the second recessed wall 305. That is, after the recessed portion 301 is recessed into the box body 1, the first recessed wall 304 and the second recessed wall 305 are formed inside the box body 1, and their cross-section is as follows. Figure 3 As shown, the folding angle between the first recessed wall 304 and the second recessed wall 305 is 90°. Preferably, the selectable range can also be expanded to 80-100° to adapt to the production process requirements.

[0032] A reinforcing rib 306 is formed at the folded junction between the aforementioned recessed walls; that is, the reinforcing rib 306 is placed inside the housing 1, and in... Figure 3 As shown in the cross-section, the reinforcing ridge 306 and the edge 3 form a diagonal edge, that is, the connection between the two recessed walls and the adjacent sidewall 2 constitutes a rectangular cross-section, forming a rectangular support hole 302, and the rectangular support hole 302 extends vertically downwards throughout the recessed portion 301, as shown in the cross-section. Figure 1-2 As shown.

[0033] The support hole 302 is provided with a support rod 303 that is parallel to the edge 3 in the vertical direction. The support rod 303 is a round rod. Specifically, a rigid cardboard can be rolled into a round rod 303 with a diameter of 6-10mm. Here, the diameter of the support rod 303 can also be adapted to the overall size of the box 1 to match the strength of the object contained in the box 1.

[0034] After the support rod 303 is inserted into the support hole 302 parallel to the edge 3, the lower end of the support rod 303 abuts against the bottom wall of the box 1, and the upper end abuts against the inner bottom surface of the top wall of the box 1 or leaves a gap of 1-5mm, so as to facilitate the folding and sealing of the top cover of the box 1.

[0035] A rectangular plastic limiting plate 4 is fitted onto the bottom end of the support rod 303. The outer edge of the limiting plate 4 is larger than the opening of the recess 301, and the edge of the limiting plate 4 maintains a gap of 0.5-2mm with the side wall 2 so that the limiting plate 4 can slide smoothly relative to the support rod 303.

[0036] One end of the support rod 303 is fixed with a pull rope 5. One end of the pull rope 5 is fixed to the end face of the limiting plate 4 away from the bottom surface of the box 1, and the other end extends upward along the outer surface of the support rod 303 and is fixed to the side wall of the support rod 303, or is fixed after passing through the support rod 303 body, so as to improve the fixing strength of the pull rope 5; in addition, the pull rope 5 is provided through the support hole 302, such as Figure 2 As shown, the pull rope 5 is placed outside the recess 301, which makes it convenient for the operator to pull the pull rope 5.

[0037] The fixed position of the pull rope 5 and the support rod 303 is preferably located above the recessed portion 301. The end face of the limiting plate 4 facing the recessed portion 301 is provided with a glue bladder 401 that abuts against the lower end face of the first recessed wall 304 and the second recessed wall 305. The glue bladder 401 is a thin-walled bladder filled with glue. After being squeezed, the glue bladder 401 breaks, filling the space between the lower end face of the recessed wall and the limiting plate 4 with glue.

[0038] In use, when the box 1 needs to be lifted, the operator pulls the pull rope 5, which lifts the limiting plate 4 and makes it slide upward to contact the recessed part 301. When the limit plate 4 end face is pressed and the glue bag 401 is broken, the pre-prepared quick-drying water-based glue inside the bag overflows and bonds and cures the limit plate 4 to the periphery of the recessed part 301. The glue bag 401 is preferably a thin-walled PVC bag (thickness 0.1mm), which is fixed to the surface of the limit plate 4 by heat melting or pasting.

[0039] The method for using a high-strength corrugated cardboard box as described above is as follows: During the die-cutting of the corrugated cardboard, the outline of the recessed portion 301 is simultaneously punched out, and a V-shaped crease (90° angle) is pre-pressed at the reinforcing rib 306; the side wall 2 is folded to form the box body, and the recessed portion 301 automatically recesses to form the support hole 302; the support rod 303 is inserted from bottom to top, and then the bottom plate of the box body 1 is folded, at which point the pull rope 5 is placed outside the recessed portion 301 and exposed; then the remaining parts of the box body 1 are folded and assembled into a complete box body for storing objects.

[0040] When using the box, if the user needs to lift the box 1, simply pull the pull rope 5 to pull it outward. At this time, the limiting plate 4 is pulled upward by the pull rope 5 and slides upward to contact the recessed part 301 and is then pressed, causing the glue bag 401 to rupture. The pre-prepared quick-drying water-based glue inside the bag overflows and bonds the limiting plate 4 to the periphery of the recessed part 301. After standing for a few seconds, the glue cures, and the operator can then lift it by pulling the pull rope 5. Depending on the required lifting position and number, the pull ropes on each edge 3 can be selectively pulled.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-strength corrugated cardboard box, characterized in that: Includes a box body (1) and several side walls (2) that form the outer wall of the box body (1); The adjacent sidewalls (2) are folded to form an edge (3), and the edge (3) is provided with a number of recesses (301) that are recessed into the inner cavity of the box (1). After the recessed portion (301) is recessed, a support hole (302) is formed between it and the side wall (2). A support rod (303) is provided in the support hole (302) and is arranged parallel to the edge (3).

2. A high-strength corrugated cardboard box according to claim 1, characterized in that: The support rod (303) is a round rod, which is formed by rolling or molding rigid cardboard in one piece.

3. A high-strength corrugated cardboard box according to claim 1, characterized in that: The recessed portion (301) includes a first recessed wall (304) and a second recessed wall (305) after being recessed inward. The first recessed wall (304) and the second recessed wall (305) are folded together to form a reinforcing ridge (306).

4. A high-strength corrugated cardboard box according to claim 3, characterized in that: The angle between the first recessed wall (304) and the second recessed wall (305) after folding is 80-100°; The first recessed wall (304) and the second recessed wall (305) form a rectangular cross section with the adjacent side wall (2) at the junction, and the support hole (302) is a rectangular hole.

5. A high-strength corrugated cardboard box according to claim 1, characterized in that: The upper end of the support rod (303) abuts against the top wall of the box (1), and the lower end abuts against the bottom wall of the box (1).

6. A high-strength corrugated cardboard box according to claim 1, characterized in that: A limiting plate (4) is slidably provided on the support rod (303). A pull rope (5) is fixed at one end of the support rod (303), and the other end extends axially along the outer wall of the support rod (303) and is fixedly connected to the limiting plate (4).

7. A high-strength corrugated cardboard box according to claim 6, characterized in that: The limiting plate (4) is a rectangular plate, which is slidably disposed on the end of the support rod (303) near the bottom wall and the edge of the limiting plate (4) near the side wall (2) is in sliding fit with the side wall (2).

8. A high-strength corrugated cardboard box according to claim 6, characterized in that: One end of the pull rope (5) is connected to the limiting plate (4), and the other end is simultaneously passed through the support hole (302) along with the support rod (303) and then fixedly connected to the side wall of the support rod (303).

9. A high-strength corrugated cardboard box according to claim 6, characterized in that: The outer edge of the limiting plate (4) is larger than the outer edge of the recess (301) section. A glue bag (401) is provided on the end face of the plate near the recess (301). The glue bag (401) is a thin-walled bag containing glue, which overflows when squeezed.

10. A high-strength corrugated cardboard box according to claim 9, characterized in that: The limiting plate (4) is made of plastic, and the glue bag (401) is fixedly connected to the surface of the limiting plate (4).

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