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 invention relates to the field of packaging cartons, and 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 heavy objects used in production and life have also exploded, and many of them have to be transported over long distances. The packaging industry that matches it must also keep up. In order to prevent such heavy packaging from being damaged by vibration, collision, extrusion, etc. during long-distance transportation and handling, some even use wooden boxes for packaging. However, the disadvantage of using wooden boxes for packaging is that not only is the packaging cost high, but it is also difficult to disassemble.

[0003] In order to solve the above problems, the industry has also adopted 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 on the lid of the box. Although it is convenient for operators to produce and assemble packaging boxes, the rectangular cardboard box body is large in size, which is not convenient for storage and transportation. Moreover, the gap between the upper and lower surfaces of the cardboard box body and the lid and bottom plate is small, which is not easy to align during installation. In addition, although a reinforcement plate is set, the single-layer reinforcement plate has limited supporting force, and it is set on the inner walls around the cardboard box body, and cannot better support and protect the four corners of the cardboard box body. 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 conducted in-depth research on the above-mentioned defects in the prior art, and thus came up with this case. Summary of the invention

[0005] In order to solve the above technical problems, we have proposed a packaging box for packaging heavy objects. The various components can be quickly assembled and formed by plugging in. 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, which improves the supporting strength of the entire box and meets the needs of packaging heavy objects.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A packaging box for packaging heavy objects, comprising 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 an upwardly open square box structure, the upper cover is a downwardly open square box structure, the four side panels are rectangular paperboards, 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 plates with an L-shaped cross section, and the inner L-shaped plate and the outer L-shaped plate both have two mutually perpendicular inner side surfaces and outer side surfaces;

[0008] The outer L-shaped plate is arranged at 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 an inner side surface of the outer L-shaped plate, an outer side surface of the inner L-shaped plate is fixed on 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 erected 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 supporting strips in the two adjacent corner guards, and after the four side panels and the four corner guards are inserted, a cardboard box body open upward 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 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.

[0013] Preferably, the inner L-shaped board, the support strip and the outer L-shaped board are all composite paperboards, and the thickness of the support strip 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 scheme, the present invention is designed with four side panels and four corner guards; the four side panels are rectangular paperboards, 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 plates with L-shaped cross sections, and the inner L-shaped plate and the outer L-shaped plate both have 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 at the inner right angle of the outer L-shaped plate, and the outer side surface of the support strip is connected to an inner side surface of the outer L-shaped plate, and an outer side surface of the inner L-shaped plate is fixed to the inner side surface of the support strip On the side, two insertion holes are formed on both sides between the inner L-shaped plate and the outer L-shaped plate, and the widths of the two insertion holes are equal; four corner guards are respectively erected 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, a cardboard box body open upward is formed. This makes the packaging box easy to store and install, and is also convenient for storage and transportation. It can be quickly installed and formed by plugging. The three-layer structure of the corner guard has 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 easy to be damaged, which better protects the packaged products and meets 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 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 A three-dimensional diagram of a corner protector of a packaging box for packaging heavy objects disclosed in this embodiment;

[0024] Figure 6 A top view of a corner protector of a packaging box 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 A bottom view of a packing box upper cover for packing heavy objects disclosed in this embodiment after being connected with an upper pad;

[0027] Fig. 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 parts names:

[0029] 1. Pallet 2. Lower cover 3. Side plate 4. Corner guard 41. Inner L-shaped plate 42. Support bar 43. Outer L-shaped plate 5. Upper cover 6. Socket 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0031] The present invention is further described in detail below with reference to examples and specific implementation modes.

[0032] Example

[0033] like Figure 1-9 As shown, a packaging box for packaging heavy objects comprises 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, the upper cover 5 is a square box structure open downward, the four side panels 3 are rectangular paperboards, 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 both have two inner side surfaces and outer side surfaces perpendicular to each other;

[0034] The outer L-shaped plate 43 is arranged at the outermost layer of the corner guard 4, 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 an inner side surface of the outer L-shaped plate 43, an outer side surface of the inner L-shaped plate 41 is fixed on 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 widths of the two insertion openings are equal;

[0035] The tray 1 is arranged at the bottom of the packaging box, the lower cover 2 is arranged on the tray 1, the four corner guards 4 are respectively erected 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, a cardboard box body 7 open upward is formed; the upper cover 5 is buckled on the upper end of the cardboard box body 7.

[0036] In order to better protect the top of the packaged object and increase the pressure bearing capacity of the upper cover 5, a pad 8 is also bonded to the inner bottom surface of the upper cover 5. The pad 8 is formed by laminating three layers of corrugated cardboard 9, and the extension directions of the corrugations 91 in two adjacent corrugated cardboards 9 are set perpendicular to each other. Of course, the pad 8 can also be formed by other harder materials with a certain support strength, and the number of pads 8 can be set to one or more layers of plate laminating. If some plate structures have ribs or textures, the ribs or textures of two adjacent plates are set perpendicular to each other when laminating. There will be no special restrictions on these, which all belong to the protection scope of the present invention.

[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 are in contact with the outer side of the inner L-shaped plate 41 and the inner side of the outer L-shaped plate 43 respectively, so that the side panel 3 can be tightly connected to the corner guard 4.

[0038] The side panels 3 are formed by laminating three layers of corrugated paperboards 9, and the extending directions of the corrugations 91 in two adjacent corrugated paperboards 9 are arranged perpendicular to each other, and the outer surface of the outermost corrugated paperboard is waterproofed to form a waterproof layer. This enables the corrugations 91 in the three layers of corrugated paperboards 9 to cooperate with each other in both the longitudinal and transverse directions to enhance the packaging protection strength, and at the same time prevent the internal packaging products from being dampened due to the entry of external water vapor.

[0039] At the same time, in order to further improve the strength of the corner guard 4, the inner L-shaped plate 41, the support strip 42 and the outer L-shaped plate 43 are all composite paperboards, and the thickness of the support strip 42 is greater than that of the inner L-shaped plate 41 and the outer L-shaped plate 43, and the thickness of the inner L-shaped plate 41 and the outer L-shaped plate 43 is the same. The outer surface of the outer L-shaped plate 43 is also waterproofed to form a waterproof layer. Therefore, the corner guard 4 of the paperboard box body 7 can also prevent external water vapor from entering and causing the internal packaged product to be damp.

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

[0041] In addition, the inner L-shaped plate 41 and the outer L-shaped plate 43 of the corner protector 4 each include two mutually perpendicularly connected side portions, and the two side portions have the same width, so that the corner protector 4 can extend to the same area on both sides of the four corners of the cardboard box body 7, the force at the connection is more balanced, and the box corners of the cardboard box body 7 can also look symmetrical and delicate on both sides, so as to better protect the packaged products.

[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 in sequence 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 paperboards, 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 outer L-shaped plate 43 at a right angle, and the outer side surface of the support strip 42 is connected to an 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 On the inner side of the cover 42, 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 widths of the two insertion openings 6 are equal; the four corner guards 4 are respectively erected and inserted at the four corners of the upward opening of the lower cover 2, and the lower end outer side 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 openings 6 on the same side of the two adjacent corner guards 4, and the two side end surfaces of the side panels 3 are in contact with the support strips in the two adjacent corner guards, and after the four side panels 3 and the four corner guards 4 are inserted, a cardboard box body 7 open upward is formed. This makes the packaging box very easy to store and install, and is also convenient for storage and transportation, and can be quickly installed and formed by plugging. The three-layer structure of the corner protector 4 has the functions of connecting the side panels 3 and strengthening the strength of the four corners of the cardboard box 7, which can better support and protect the four corners of the cardboard box, thereby better improving the support strength of the entire box. Even if the box is pulled and squeezed from the two adjacent sides, it is not easy to be damaged, better protecting the packaged products, and fully meeting the needs of packaging heavy objects. Thus, the purpose of novel design, reasonable structure and good application effect is achieved.

[0044] The above is only a preferred embodiment of a 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, which all fall within the protection scope of the present invention.

Claims

1. A packaging box for packaging heavy objects, characterized in that: It 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, the upper cover is a square box structure open downward, the four side panels are rectangular cardboards, 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 plates with an L-shaped cross section, and the inner L-shaped plate and the outer L-shaped plate both have two inner side surfaces and outer side surfaces perpendicular to each other; The outer L-shaped plate is arranged at 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 an inner side surface of the outer L-shaped plate, an outer side surface of the inner L-shaped plate is fixed on 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 erected 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 supporting strips in the two adjacent corner guards, and after the four side panels and the four corner guards are inserted, a cardboard box body open upward 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 plate is formed by laminating at least two layers of corrugated paperboards, and the extending directions of the corrugations in two adjacent corrugated paperboards are arranged perpendicular to each other, and the outer surface of the outermost layer of corrugated paperboard 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, the support strip and the outer L-shaped board are all composite paperboards, and the thickness of the support strip 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 is 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 protector each include two side portions vertically connected to each other, and the two side portions have the same width.

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