Packaging box for packaging heavy objects

Abstract

The packaging box for packaging the heavy objects comprises a tray, a lower cover, four side plates, four protective corners and an upper cover. The lower cover is opened upwards, the upper cover is opened downwards, and each corner protector comprises a supporting strip, an inner L-shaped plate and an outer L-shaped plate, wherein the cross sections of the inner L-shaped plate and the outer L-shaped plate are L-shaped; the outer L-shaped plate is arranged on the outermost layer, the supporting strip is fixed to the break angle between the outer L-shaped plate and the inner L-shaped plate, and two insertion openings are formed in the two sides between the inner L-shaped plate and the outer L-shaped plate. The tray is arranged at the bottom, the lower cover is arranged on the tray, and the four angle beads are vertically inserted into the four corners of an upward opening of the lower cover respectively. The two side ends of the four side plates are inserted into the two insertion openings in the same side face of every two adjacent corner protectors respectively, and after the four side plates and the four corner protectors are inserted, a carton body with an upward opening is formed. And the upper cover is buckled at the upper end of the carton body. The carton can be rapidly installed and formed in an inserting mode and is easy to install and store, the corner protectors support and protect the carton body from the four corners, the supporting strength of the whole carton body is improved, and the requirement for packaging heavy objects is met.

Description

Technical Field

[0001] The utility model relates to the field of packaging cartons, in particular to a packaging box used for packaging heavy objects. Background Art

[0002] In recent years, with the rapid development of the industrial economy, the amount of heavy objects used in production and daily life has exploded, and many of these items require long-distance transportation. The packaging industry must keep pace with this trend. To prevent these heavy items from being damaged by vibration, collision, and squeezing during long-distance transportation and handling, some even use wooden crates. However, the drawbacks of using wooden crates are not only high packaging costs but also difficulty in disassembly.

[0003] In order to solve the above problems, the industry has also adopted the use of cartons to package heavy objects. When reinforcing the cartons, L-shaped corner guards are often set on the internal corners. For example, a packaging carton with application number 202320210396.7 is called a carton, but in fact, wooden boards are also used at the lid. Although it is convenient for operators to produce and assemble packaging boxes, the rectangular structure of the cardboard box is large in size, which is not convenient for storage and transportation. Moreover, the gaps at the connection between the upper and lower surfaces of the cardboard box and the lid and bottom plate are small, making it difficult to align during installation. In addition, although a reinforcing plate is provided, the single-layer structure reinforcing plate has limited supporting force, and it is provided on the inner walls around the cardboard box, and cannot better support and protect the four corners of the cardboard box. The four corners of the packaging carton are actually the places where the force is greater. They may be pulled and squeezed from the two adjacent sides, and are more easily damaged by external forces.

[0004] In view of this, the inventor of the present invention conducted in-depth research on the above-mentioned defects in the prior art, and thus came up with this case. Utility Model Content

[0005] To solve the above technical problems, we have proposed a packaging box for heavy objects. The various components can be quickly assembled and formed by plugging them into a box. It is easy to store and install, and is also convenient for storage and transportation. The corner guards support and protect the cardboard box from the four corners, improving the supporting strength of the entire box and meeting the needs of packaging heavy objects.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:

[0007] A packaging box for packaging heavy objects, comprising a tray, a lower cover, four side panels, four corner protectors, and an upper cover; the tray is a square frame structure, the lower cover is an upwardly open square box structure, and the upper cover is a downwardly open square box structure; the four side panels are rectangular cardboard; the corner protectors include an inner L-shaped plate, a support strip, and an outer L-shaped plate; the inner L-shaped plate and the outer L-shaped plate are both L-shaped in cross section, and each has two mutually perpendicular inner and outer side surfaces;

[0008] The outer L-shaped plate is arranged on the outermost layer of the corner guard, the support strip is fixed on the inner side surface of the outer L-shaped plate at the right angle, and the outer side surface of the support strip is connected to one inner side surface of the outer L-shaped plate, one outer side surface of the inner L-shaped plate is fixed to the inner side surface of the support strip, and two insertion openings are formed on both sides between the inner L-shaped plate and the outer L-shaped plate, and the widths of the two insertion openings are equal;

[0009] The tray is arranged at the bottom of the packaging box, and the lower cover is arranged on the tray. The four corner guards are respectively upright and inserted at the four corners of the upward opening of the lower cover, and the outer side surface of the lower end of the outer L-shaped plate is tightly connected to the inner wall of the upward opening corner of the lower cover; the two side ends of the four side panels are respectively inserted into the two insertion holes on the same side of the two adjacent corner guards, and the two side end surfaces of the side panels are in contact with the support strips in the two adjacent corner guards, and after the four side panels and the four corner guards are inserted, an upwardly open cardboard box body is formed; the upper cover is buckled at the upper end of the cardboard box body.

[0010] Preferably, a backing plate is bonded to the inner bottom surface of the upper cover, and the backing plate is formed by laminating one or more layers of plate materials.

[0011] Preferably, the side panels and the support bars have the same thickness.

[0012] Preferably, the side panels are formed by laminating at least two layers of corrugated cardboard, and the corrugations in two adjacent corrugated cardboards are arranged to extend perpendicularly to each other, and the outer surface of the outermost layer of corrugated cardboard is waterproofed to form a waterproof layer.

[0013] Preferably, the inner L-shaped board, support strips and outer L-shaped board are all made of composite paperboard, and the thickness of the support strips is greater than that of the inner L-shaped board and the outer L-shaped board, and the thickness of the inner L-shaped board and the outer L-shaped board are the same.

[0014] Preferably, the outer surface of the outer L-shaped plate is waterproofed to form a waterproof layer.

[0015] Preferably, the side panels, inner L-shaped panels, support bars and outer L-shaped panels are of the same height.

[0016] Preferably, the inner L-shaped plate and the outer L-shaped plate of the corner protector each include two side portions vertically connected to each other, and the two side portions have the same width.

[0017] Through the above technical solution, the utility model is designed with four side panels and four corner guards; the four side panels are rectangular cardboards, and the corner guards include an inner L-shaped panel, a support strip and an outer L-shaped panel, and the inner L-shaped panel and the outer L-shaped panel are both panels with an L-shaped cross section, and the inner L-shaped panel and the outer L-shaped panel have two mutually perpendicular inner and outer side surfaces; the outer L-shaped panel is arranged on the outermost layer of the corner guard, the support strip is fixed on the inner side surface at the inner right angle of the outer L-shaped panel, and the outer side surface of the support strip is connected to one inner side surface of the outer L-shaped panel, and one outer side surface of the inner L-shaped panel is fixed to the support strip. On the inner side, two slots are formed on both sides between the inner L-shaped plate and the outer L-shaped plate, and the widths of the two slots are equal. Four corner guards are respectively installed upright at the four corners of the upward opening of the lower cover, and the outer side of the lower end of the outer L-shaped plate is tightly connected to the inner wall of the upward opening corner of the lower cover. The two side ends of the four side panels are respectively inserted into the two slots on the same side of two adjacent corner guards, and the two side end surfaces of the side panels are in contact with the support strips in the two adjacent corner guards. After the four side panels and the four corner guards are inserted, an upward-opening cardboard box body is formed. This makes the packaging box easy to store and install, and is also convenient for storage and transportation. It can be quickly assembled and formed by plugging. The three-layer structure of the corner guards combines the functions of connecting the side panels and supporting, which can better support and protect the four corners of the cardboard box body, thereby better improving the supporting strength of the entire box body. Even if the box body is pulled and squeezed from the two adjacent sides, it is not easily damaged, better protecting the packaged products and meeting the needs of packaging heavy objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is an exploded view of a packaging box for packaging heavy objects disclosed in this embodiment;

[0020] Figure 2 This is a state diagram of a packaging box for packaging heavy objects disclosed in this embodiment during the installation and molding process;

[0021] Figure 3 This is a state diagram of a packaging box for packaging heavy objects disclosed in this embodiment after the installation and molding process;

[0022] Figure 4 This is a diagram of a packaging box for packaging heavy objects disclosed in this embodiment after being stored;

[0023] Figure 5 This is a three-dimensional diagram of a corner protector for a packaging box used for packaging heavy objects disclosed in this embodiment;

[0024] Figure 6 This is a top view of a corner protector for a packaging box used for packaging heavy objects disclosed in this embodiment;

[0025] Figure 7 This is an exploded view of a side panel of a packaging box for packaging heavy objects disclosed in this embodiment;

[0026] Figure 8 This is a bottom view of the upper cover of a packaging box for packaging heavy objects disclosed in this embodiment after being connected to the upper pad;

[0027] Figure 9 This is a three-dimensional diagram of a packing box pad for packing heavy objects disclosed in this embodiment.

[0028] The numbers in the figure represent the corresponding component names:

[0029] 1. Pallet 2. Bottom cover 3. Side panels 4. Corner guards 41. Inner L-shaped board 42. Support bar 43. Outer L-shaped board 5. Top cover 6. Insert 7. Cardboard box 8. Pad 9. Corrugated cardboard 91. Corrugated DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The present invention will be further described in detail below with reference to the embodiments and specific implementation methods.

[0032] Example

[0033] like Figure 1-9 As shown, a packaging box for packaging heavy objects includes a tray 1, a lower cover 2, four side panels 3, four corner guards 4, and an upper cover 5; the tray 1 is a square frame structure, the lower cover 2 is a square box structure open upward, and the upper cover 5 is a square box structure open downward; the four side panels 3 are rectangular cardboards, and the corner guards 4 include an inner L-shaped plate 41, a support strip 42, and an outer L-shaped plate 43. The inner L-shaped plate 41 and the outer L-shaped plate 43 are both plates with an L-shaped cross section, and each of the inner L-shaped plate and the outer L-shaped plate has two mutually perpendicular inner and outer side surfaces;

[0034] The outer L-shaped plate 43 is arranged on the outermost layer of the corner guard 4, and the support bar 42 is fixed on the inner side surface of the outer L-shaped plate 43 at the right angle, and the outer side surface of the support bar 42 is connected to one inner side surface of the outer L-shaped plate 43. One outer side surface of the inner L-shaped plate 41 is fixed to the inner side surface of the support bar 42, and two insertion openings 6 are formed on both sides between the inner L-shaped plate 41 and the outer L-shaped plate 43, and the width of the two insertion openings is equal;

[0035] The tray 1 is arranged at the bottom of the packaging box, and the lower cover 2 is arranged on the tray 1. The four corner guards 4 are respectively upright and inserted at the four corners of the upward opening of the lower cover 2, and the outer side surface of the lower end of the outer L-shaped plate 43 is tightly connected to the inner wall of the upward opening corner of the lower cover 2; the two side ends of the four side panels 3 are respectively inserted into the two insertion holes 6 on the same side of the two adjacent corner guards 4, and the two side end surfaces of the side panels 3 are connected to the support strips 42 in the two adjacent corner guards 4, and after the four side panels 3 and the four corner guards 4 are inserted, an upward opening cardboard box body 7 is formed; the upper cover 5 is buckled at the upper end of the cardboard box body 7.

[0036] To better protect the top of the packaged item and increase the pressure-bearing capacity of the upper cover 5, a backing plate 8 is bonded to the inner bottom surface of the upper cover 5. The backing plate 8 is formed by laminating three layers of corrugated cardboard 9, with the corrugations 91 of two adjacent pieces of corrugated cardboard 9 extending perpendicularly to each other. Of course, the backing plate 8 can also be formed from other harder materials with a certain degree of support strength, and the number of layers of the backing plate 8 can be set to be one or more layers of plate. If some plate structures have ribs or textures, the ribs or textures of two adjacent plates can be arranged perpendicularly to each other when laminating. No special restrictions are imposed on these, and all of them fall within the scope of protection of the present utility model.

[0037] The side panel 3 and the support strip 42 have the same thickness so that when the end of the side panel 3 is inserted into the plug-in port 6, the inner and outer sides of the end of the side panel 3 respectively contact the outer side of the inner L-shaped plate 41 and the inner side of the outer L-shaped plate 43, thereby enabling the side panel 3 to be tightly connected to the corner guard 4.

[0038] The side panels 3 are formed by laminating three layers of corrugated cardboard 9, with the corrugations 91 of two adjacent corrugated cardboard sheets 9 extending perpendicularly to each other. The outermost layer of corrugated cardboard is waterproofed to form a waterproof layer. This allows the corrugations 91 of the three layers of corrugated cardboard 9 to support each other in both the vertical and horizontal directions, enhancing the packaging's protective strength while preventing moisture from entering the packaged product.

[0039] To further enhance the strength of the corner guard 4, the inner L-shaped panel 41, support strips 42, and outer L-shaped panel 43 are all made of composite paperboard. The support strips 42 are thicker than the inner L-shaped panel 41 and outer L-shaped panel 43, which are the same thickness. The outer L-shaped panel 43 also has a waterproof coating on its outer surface. This prevents moisture from entering the corner guard 4 of the cardboard box 7, potentially damaging the packaged product.

[0040] In order to make the connection between the side panels 3 and the corner guards 4 more secure and maintain the overall consistency after connection, the side panels 3, the inner L-shaped panels 41, the support strips 42 and the outer L-shaped panels 43 are of the same height. In this way, after connection, the cardboard box body 7 can be fully supported and protected at all four corners.

[0041] Furthermore, the inner L-shaped plate 41 and outer L-shaped plate 43 of the corner protector 4 each include two perpendicularly connected side portions of equal width. This ensures that the corner protector 4 extends over the same area on both sides of the four corners of the cardboard box 7, resulting in more balanced forces at the joints and a symmetrical and refined appearance of the corners of the cardboard box 7, thereby better protecting the packaged product.

[0042] For example Figure 4 As shown, before the heavy-duty packaging box is assembled or stored, the four side panels 3 can be overlapped and placed in the lower cover 2, and then the four corner guards 4 can be placed side by side on the top side panel 3, and then the upper cover 5 can be closed.

[0043] In this example, the present invention is designed with four side panels 3 and four corner guards 4; the four side panels 3 are rectangular cardboards, and the corner guards 4 include an inner L-shaped plate 41, a support strip 42 and an outer L-shaped plate 43. The inner L-shaped plate 41 and the outer L-shaped plate 43 are both plates with an L-shaped cross section, and the inner L-shaped plate and the outer L-shaped plate have two mutually perpendicular inner and outer side surfaces; the outer L-shaped plate 43 is arranged on the outermost layer of the corner guard 4, the support strip 42 is fixed on the inner side surface of the inner right angle of the outer L-shaped plate 43, and the outer side surface of the support strip 42 is connected to one inner side surface of the outer L-shaped plate 43, and one outer side surface of the inner L-shaped plate 41 is fixed to the support strip Two slots 6 are formed on the inner side of the strip 42, on either side between the inner L-shaped plate 41 and the outer L-shaped plate 43, and are of equal width. Four corner guards 4 are vertically inserted into the four corners of the upwardly open portion of the lower cover 2, tightly connecting the lower outer side of the outer L-shaped plate 43 to the inner wall of the upwardly open corner of the lower cover 2. The two side ends of the four side panels 3 are respectively inserted into the two slots 6 on the same side of two adjacent corner guards 4, and the two side end surfaces of the side panels 3 contact the support strips in the adjacent corner guards. After the four side panels 3 and the four corner guards 4 are plugged together, an upwardly open cardboard box body 7 is formed. This makes the packaging box easy to store, install, and transport, and it can be quickly assembled and formed using a plug-in method. The three-layer corner protectors 4 both connect the side panels 3 and reinforce the four corners of the cardboard box 7, providing better support and protection for the four corners of the cardboard box, thereby enhancing the overall strength of the box. Even if the box is pulled or squeezed from two adjacent sides, it is not easily damaged, thus better protecting the packaged products and fully meeting the requirements for packaging heavy items. This achieves the goals of novel design, reasonable structure, and good application effect.

[0044] The above is only a preferred embodiment of the packaging box for packaging heavy objects of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A packaging box for packaging heavy objects, characterized in that: The tray comprises a tray, a lower cover, four side panels, four corner guards, and an upper cover; the tray is a square frame structure, the lower cover is a square box structure open upward, and the upper cover is a square box structure open downward; the four side panels are rectangular cardboards, and the corner guards include an inner L-shaped plate, a support strip, and an outer L-shaped plate; the inner L-shaped plate and the outer L-shaped plate are both L-shaped plates in cross section, and each has two mutually perpendicular inner and outer side surfaces; The outer L-shaped plate is arranged on the outermost layer of the corner guard, the support strip is fixed on the inner side surface of the outer L-shaped plate at the right angle, and the outer side surface of the support strip is connected to one inner side surface of the outer L-shaped plate, one outer side surface of the inner L-shaped plate is fixed to the inner side surface of the support strip, and two insertion openings are formed on both sides between the inner L-shaped plate and the outer L-shaped plate, and the widths of the two insertion openings are equal; The tray is arranged at the bottom of the packaging box, and the lower cover is arranged on the tray. The four corner guards are respectively upright and inserted at the four corners of the upward opening of the lower cover, and the outer side surface of the lower end of the outer L-shaped plate is tightly connected to the inner wall of the upward opening corner of the lower cover; the two side ends of the four side panels are respectively inserted into the two insertion holes on the same side of the two adjacent corner guards, and the two side end surfaces of the side panels are in contact with the support strips in the two adjacent corner guards, and after the four side panels and the four corner guards are inserted, an upwardly open cardboard box body is formed; the upper cover is buckled at the upper end of the cardboard box body.

2. A packaging box for packaging heavy objects according to claim 1, characterized in that: A backing plate is also bonded to the inner bottom surface of the upper cover, and the backing plate is formed by laminating one or more layers of plate materials.

3. A packaging box for packaging heavy objects according to claim 2, characterized in that: The side panels and the support bars have the same thickness.

4. A packaging box for packaging heavy objects according to claim 3, characterized in that: The side panels are formed by laminating at least two layers of corrugated cardboards, and the extending directions of the corrugations in two adjacent corrugated cardboards are arranged perpendicular to each other, and the outer surface of the outermost layer of corrugated cardboard is waterproofed to form a waterproof layer.

5. A packaging box for packaging heavy objects according to claim 4, characterized in that: The inner L-shaped board, support strips and outer L-shaped board are all made of composite paperboard, and the thickness of the support strips is greater than that of the inner L-shaped board and the outer L-shaped board, and the thickness of the inner L-shaped board and the outer L-shaped board are the same.

6. A packaging box for packaging heavy objects according to claim 5, characterized in that: The outer surface of the outer L-shaped plate is waterproofed to form a waterproof layer.

7. A packaging box for packaging heavy objects according to claim 6, characterized in that: The side panels, inner L-shaped panels, support bars and outer L-shaped panels have the same height.

8. A packaging box for packaging heavy objects according to claim 7, characterized in that: The inner L-shaped plate and the outer L-shaped plate of the corner guard each include two side portions vertically connected to each other, and the two side portions have the same width.

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