A heavy-duty corrugated paper packaging box without glue and connected by nails

Abstract

The invention discloses a heavy-duty corrugated paper packaging box connected without glue and nails. The packaging box is composed of an end cover and a surrounding box. The end cover includes a cover body. The outer periphery of the cover body is connected to a cover body side wall. The cover body side wall and the cover body enclose an open accommodation space, and the surrounding box is adapted to be plugged into the accommodation space of the end cover. The end cover is formed by folding the cover body side wall relative to the cover body according to the die-cutting pressure line of the corrugated paper material. After folding, a stable end cover is formed. The top and bottom of the surrounding box are respectively adapted to be inserted into the two end covers for fixing, so that a packaging box with a solid structure is obtained. The packaging box does not need to be connected with iron nails or glue, has a simple structure, and can be assembled by only one staff member, with low labor cost. At the same time, before use, the end cover and the surrounding box can be stored and transported in a plane structure, which can save more than 50% of space compared with traditional corrugated paper packaging boxes. Not using iron nails or glue for connection also has the effect of saving resources and being green and environmentally friendly. There are no structures such as iron nails outside the packaging box, and the appearance is high.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging processing, and relates to a packaging box, in particular to a heavy-duty corrugated paper packaging box that does not require glue or nails for connection. Background Art

[0002] In the field of packaging and processing, wooden boxes are a traditional packaging container, which provides great convenience for people's lives. However, due to the large amount of wood required, it has caused great damage to the environment, and discarded wooden packaging boxes are difficult to recycle. With the continuous reduction of wood resources and the deterioration of the natural environment, the research and development of new packaging materials to replace the use of wood has received more and more attention from the industry. Many new packaging materials such as high-strength corrugated paper composite boards, heavy-duty corrugated paperboards, honeycomb paperboards, etc. have gradually become new packaging materials to replace wooden packaging materials. It plays a role in replacing wood and metal with paper, reducing resource consumption and packaging costs in a low-carbon economy.

[0003] Heavy-duty corrugated paperboard boxes made of heavy-duty corrugated cardboard are rigid paper containers with advantages such as light weight, good structural performance, shockproof, cushioning, foldable, strong printability, and environmental protection and recyclability. They can largely replace wooden heavy-duty packaging boxes and become the main force of transportation packaging. At the same time, heavy-duty corrugated paper packaging boxes are green and environmentally friendly products, which are beneficial to environmental protection and convenient for loading and unloading. In the fierce competition among many packaging materials, heavy-duty corrugated paper boxes have become the most important packaging material in modern packaging with the above unique advantages.

[0004] In the prior art, conventional heavy-duty corrugated paper packaging boxes usually include three important parts: a top cover, a bottom cover, and a surrounding box. Since the sizes are relatively large (depending on the needs, the sizes are generally within the range of 1m*1m*1m), in order to improve their firmness, iron nails and glue are usually used to fix the top and bottom covers and the surrounding box. However, this fixing method has the following problems: the iron nails affect the appearance of the carton, and after long-term use, the iron nails are also susceptible to rust and damage due to changes in the environment, temperature and humidity. In addition, the surrounding box becomes large and heavy after being fixed and formed by iron nails and glue, which makes it difficult for a single person to carry and operate, and is inconvenient for assembly, cargo unloading, and other operations, which increases the difficulty of operation for the assembler. Using iron nails and glue to fix heavy-duty corrugated paper packaging boxes also wastes iron nail and glue resources, which is not conducive to environmental protection. Although the surrounding box can be folded after fixing, the top and bottom covers are not suitable for folding. The three stacked together will still take up a lot of storage space, which is not conducive to the rational use of space. Summary of the invention

[0005] To this end, the technical problem to be solved by the present invention is that traditional heavy-duty corrugated paper boxes usually need to be fixed with iron nails and glue. The iron nails are easy to rust, which affects the firmness of the packaging boxes. They are also difficult to assemble and carry, with high labor costs. At the same time, they are not environmentally friendly and have an unsightly appearance. Therefore, a heavy-duty corrugated paper with a simple and beautiful structure, no need for glue, connected and fixed with iron nails, with a more compact structure, easy to assemble, and green and environmentally friendly glue-free and nail-connected is proposed.

[0006] In order to solve the above technical problems, the technical solution of the present invention is:

[0007] The present invention provides a heavy-duty corrugated paper packaging box connected without glue and nails. The packaging box consists of an end cover and a two-piece enclosure box. The two-piece enclosure box is arranged opposite to each other. The end cover includes a cover body. The outer periphery of the cover body is connected to a cover body side wall. The cover body side wall and the cover body enclose an open accommodating space. The enclosure box is adapted to be inserted into the accommodating space of the end cover.

[0008] Preferably, the top cover and the bottom cover have the same structure and both include a rectangular cover body, the rectangular cover body is sequentially connected with a first cover side wall, a second cover side wall, a third cover side wall and a fourth cover side wall on all four sides, a slot is provided at the connection between the first cover side wall, the third cover side wall and the cover body, and an insert tongue adapted to the slot is provided at the end of the first cover side wall and the third cover side wall away from the connection.

[0009] Preferably, two ends of the second cover side wall and the fourth cover side wall are respectively connected with a flat fastener, and the flat fastener is fitted on the inner surface of the first cover side wall and the third cover side wall.

[0010] Preferably, the enclosure is composed of two enclosure pieces, each of which is composed of a first enclosure side wall, a second enclosure side wall and a third enclosure side wall which are folded in sequence at an angle of 90°, and the enclosure piece is in a door-shaped structure.

[0011] Preferably, the three side walls of the enclosure member form an opening, and the openings of the two enclosure members are arranged opposite to each other.

[0012] Preferably, the first cover side wall and the third cover side wall are composed of a first overlapping portion and a second overlapping portion, the inserting tongue is arranged on the first overlapping portion, and the inserting slot is arranged on the second overlapping portion, and the first overlapping portion and the second overlapping portion are folded along the crease line of the side wall so that the inserting tongue is inserted into the inserting slot.

[0013] Preferably, the first cover side wall and the third cover side wall have the same size and structure, the second cover side wall and the fourth cover side wall have the same size and structure, and the width of the first cover side wall and the third cover side wall is twice the width of the second cover side wall and the fourth cover side wall.

[0014] Preferably, the three side walls of the enclosure form an opening, and the two enclosures have the same structure and size, and the openings arranged opposite to each other form a seamless joint.

[0015] Preferably, the openings facing each other of the two box enclosures are provided with matching male and female buckles, and the two box enclosures are connected by the buckles.

[0016] Preferably, the first cover side wall, the second cover side wall, the third cover side wall and the fourth cover side wall are all connected to the cover body through a cover indentation line, and the first cover side wall, the second cover side wall, the third cover side wall and the fourth cover side wall are folded along the cover indentation line and are perpendicular to the cover body; the first enclosure box side wall and the second enclosure box side wall, and the second enclosure box side wall and the third enclosure box side wall are connected by the enclosure box indentation line, so that the first enclosure box side wall, the third enclosure box side wall and the second enclosure box side wall are perpendicular to the second enclosure box side wall.

[0017] The above technical solution of the present invention has the following advantages compared with the prior art:

[0018] (1) The heavy-duty corrugated paper packaging box connected without glue and nails of the present invention is composed of an end cover and a two-piece enclosure. The two-piece enclosure is arranged opposite to each other. The end cover includes a cover body. The periphery of the cover body is connected to the cover body side wall. The cover body side wall and the cover body enclose an open accommodation space. The enclosure is adapted to be inserted into the accommodation space of the end cover. The end cover is composed of a top cover and a bottom cover. The top cover and the bottom cover are both made of corrugated paper material by folding the cover body side wall relative to the cover body according to the die-cutting pressure line. After folding, a stable accommodation space is formed. The top and bottom of the enclosure are respectively adapted to be inserted into the top cover and the bottom cover for fixing, so that a packaging box with a solid structure is obtained. The packaging box does not need to be connected with iron nails or glue, has a simple structure, can be assembled by only one staff member, is easy to operate, and has low labor costs. At the same time, before use, the top cover, the bottom cover and the enclosure can be stored and transported in a flat structure, which significantly saves storage space and can save more than 50% of space compared with traditional corrugated paper packaging boxes. In addition, no nails or glue are used for connection, which saves resources and is green and environmentally friendly. There are no protruding nails or other structures outside the packaging box, and it is very beautiful.

[0019] (2) The heavy-duty corrugated paper packaging box connected without glue or nails described in the present invention has the same structure as the top cover and the bottom cover, both of which include a rectangular cover body, and the rectangular cover body is sequentially connected with the first cover body side wall, the second cover body side wall, the third cover body side wall and the fourth cover body side wall on all sides. A slot is provided at the connection between the first cover body side wall, the third cover body side wall and the cover body, and an insertion tongue adapted to the slot is provided at the end of the first cover body side wall and the third cover body side wall away from the connection. When making the top cover or the bottom cover, the first side wall and the third side wall are folded along the indentation line in the middle thereof so that the insertion tongue fits into the slot to form a fixed position, thereby reinforcing the structure of the top cover and the bottom cover, and are not easy to loosen after assembly.

[0020] (3) The heavy-duty corrugated paper packaging box without glue and nail connection described in the present invention is composed of two packaging parts, and the packaging parts are composed of a first packaging side wall, a second packaging side wall and a third packaging side wall folded in sequence at an angle of 90 degrees, and the packaging parts are in a door-shaped structure. The packaging box is set as a two-piece structure. When assembling, the two packaging parts are respectively inserted into the bottom cover for fixing. This packaging box can be assembled by only one person, saving labor costs.

[0021] (4) In the heavy-duty corrugated paper packaging box without glue or nails, the three side walls of the enclosure members form an opening, and the openings of the two enclosure members are arranged opposite to each other. During assembly, the two enclosure members are sequentially inserted into the bottom cover, so that the door-shaped opening sides of the two enclosure members are arranged opposite to each other, and a complete rectangular enclosure is enclosed. This assembly method does not require fixing materials such as glue and nails, is easier to operate, and is more environmentally friendly.

[0022] (5) In the heavy-duty corrugated paper packaging box without glue or nails, the three side walls of the enclosure members form an opening, and one enclosure member encloses another enclosure member inside the enclosure member to close the opening, thereby forming a double-layer enclosure member structure on the side. This double-layer corrugated paper enclosure structure significantly strengthens the side walls of the packaging box.

[0023] (6) In the heavy-duty corrugated paper packaging box without glue or nails of the present invention, when the door-shaped openings of the two enclosure parts are arranged opposite to each other, the opposite openings are provided with mutually matching buckles, and the two enclosure parts are connected by the buckles. This ensures that the two enclosure parts are firmly combined and not easily misaligned during the consignment of goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0025] Figure 1 It is a top view of the heavy-duty corrugated paper packaging box connected without glue and nails as described in Example 1 of the present invention;

[0026] Figure 2 It is a schematic diagram of the unfolded state of the end cover of the heavy-duty corrugated paper packaging box connected without glue and nails as described in Example 1 of the present invention;

[0027] Figure 3 It is a schematic diagram of the folded state of the end cover of the heavy-duty corrugated paper packaging box connected without glue and nails as described in Example 1 of the present invention;

[0028] Figure 4 It is a schematic diagram of the unfolded state of the box surrounding parts in the heavy-duty corrugated paper packaging box connected without glue and nails according to Example 1 of the present invention;

[0029] Figure 5 It is a schematic diagram of the folded state of the box surrounding parts in the heavy-duty corrugated paper packaging box connected without glue and nails as described in Example 1 of the present invention;

[0030] Figure 6 It is a side view of the enclosure box in the heavy-duty corrugated paper packaging box connected without glue and nails as described in Example 1 of the present invention;

[0031] Figure 7 It is a schematic diagram of the unfolded state of the box surrounding parts in the heavy-duty corrugated paper packaging box connected without glue and nails according to Example 2 of the present invention;

[0032] Figure 8 It is a side view of the enclosure box in the heavy-duty corrugated paper packaging box connected without glue and nails as described in Example 2 of the present invention;

[0033] Fig. 9 This is a schematic diagram of assembling a heavy-duty corrugated paper packaging box connected without glue and nails as described in Example 3 of the present invention;

[0034] Fig.10 It is a schematic diagram of the assembly of the heavy-duty corrugated paper packaging box connected without glue and nails as described in Example 4 of the present invention.

[0035] The reference numerals in the figure are as follows: 1-end cover; 101-cover body; 102-first cover body side wall; 103-second cover body side wall; 104-third cover body side wall; 105-fourth cover body side wall; 106-slot; 107-insertion tongue; 108-flat fastener; 2-enclosure box; 21-enclosure box part; 211-first enclosure box side wall; 212-second enclosure box side wall; 213-third enclosure box side wall; 3-cover body indentation line; 4-side wall crease line; 5-joining position; 6-enclosure box indentation line; 7-buckle; 8-fold line.

[0036] The present invention can be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure is thorough and complete and the concept of the invention is fully conveyed to those skilled in the art. The present invention will be defined by the claims. In the accompanying drawings, the size and relative size of each device are exaggerated for clarity. The terms "first", "second", etc. in the specification of the present invention, the claims, and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate. In addition, the terms "including", "having", and any variations thereof are intended to cover non-exclusive inclusions. DETAILED DESCRIPTION

[0037] Example 1

[0038] This embodiment provides a heavy-duty corrugated paper packaging box without glue and nail connection, such as Figure 1-2 As shown, the packaging box is composed of an end cover 1 and a two-piece enclosure box 2, the end cover 1 includes a cover body 101, the outer periphery of the cover body 101 is connected to a cover body side wall through a cover body indentation line 3, the cover body side wall and the cover body 101 enclose a receiving space with an open end, and the enclosure box 2 is adapted to be inserted into the open receiving space of the end cover 1.

[0039] Specifically, the end cover 1 is composed of a top cover connected to the top of the enclosure 2 and a bottom cover connected to the bottom of the enclosure 2. The top cover and the bottom cover have the same structure and size, and are both folded from a piece of die-cut and pressed corrugated paper. Specifically, Figure 2-3 As shown, the end cover 1 (top cover or bottom cover) includes a rectangular cover body 101, and the four sides of the cover body 101 are sequentially connected with a first cover body side wall 102, a second cover body side wall 103, a third cover body side wall 104 and a fourth cover body side wall 105. The first cover body side wall 102, the second cover body side wall 103, the third cover body side wall 104 and the fourth cover body side wall 105 can be folded relative to the cover body 101 along the cover body indentation line 3. The end cover 1 is stored and transported in a sheet-like flat manner before assembly. During assembly, each cover body side wall is folded and fixed along the indentation line 3, and the enclosure box 2 is inserted between the two end covers to form a stable packaging box structure. After unloading the goods, the end cover 1 and the enclosure box 2 can be disassembled and laid flat according to the indentation line 3. In terms of the utilization of storage and transportation space, compared with traditional heavy corrugated paper packaging boxes, at least 50% of the space can be saved. The end cover 1 and the surrounding box 2 of the heavy-duty corrugated paper packaging box described in this embodiment are assembled without using any glue or nails for fixing, the assembly is simple, no connecting and fixing tools are required, and it is more environmentally friendly.

[0040] Furthermore, a slot 106 is provided at the connection between the first cover side wall 102, the third cover side wall 104 and the cover body 101 (at the cover indentation line 3), and an insertion tongue 107 adapted to the slot 106 is provided at the edge (the side wall end away from the connection) of the first cover side wall 102 and the third cover side wall 104. In order to improve the firmness of the end cover 1, two slots 106 are provided at the connection between the first cover side wall 102 and the cover body 101 and at the connection between the third cover side wall 104 and the cover body 101. The two slots 106 are symmetrically arranged along the center line of the first cover side wall 102 and the third cover side wall 104, and there are also two corresponding insertion tongues 107. The first cover side wall 102 and the third cover side wall 104 are both composed of a first overlapping portion and a second overlapping portion, wherein the second overlapping portion is a portion connected to the cover indentation line 3, the first overlapping portion and the second overlapping portion are folded through the side wall crease line 4, the insert tongue 107 is arranged on the first overlapping portion, and the slot 106 is arranged on the second overlapping portion, and the first overlapping portion is folded along the side wall crease line 4 and then fitted with the second overlapping portion, and the insert tongue 107 is adapted to be inserted into the slot 106. The first cover side wall 102 and the third cover side wall 104 have the same size and structure, the second cover side wall 103 and the fourth cover side wall 105 have the same size and structure, and the width of the first cover side wall 102 and the third cover side wall 104 is twice that of the second cover side wall 103 and the fourth cover side wall 105, so that the width of the first cover side wall 102 and the third cover side wall 104 after folding along the side wall crease line 4 is consistent with the width of the second cover side wall 103 and the fourth cover side wall 105.

[0041] Furthermore, a flat fastener 108 is respectively connected to both ends of the second cover side wall 103 and the fourth cover side wall 105 in the length direction, and the flat fastener 108 can be folded at an angle of 90° relative to the second cover side wall 103 and the fourth cover side wall 105. After folding, the flat fastener 108 fits the inner surface of the first cover side wall 102 and the third cover side wall 104 to form the end cover 1.

[0042] like Figure 4-6As shown, in this embodiment, the enclosure 2 is composed of two enclosure parts 21, each of which is composed of a first enclosure side wall 211, a second enclosure side wall 212 and a third enclosure side wall 213 connected in sequence, the first enclosure side wall 211 and the second enclosure side wall 212, and the second enclosure side wall 212 and the third enclosure side wall 213 are connected by an enclosure indentation line 6, the first enclosure side wall 211 is folded along the enclosure indentation line 6 to a position of 90° with the second enclosure side wall 212, and the third enclosure side wall 213 is folded along the enclosure indentation line 6 to a position of 90° with the second enclosure side wall 212, and the third enclosure side wall 213 is folded along the enclosure indentation line 6 to a position of 90° with the second enclosure side wall 212. 6 is folded to a position at 90° with the second enclosure box side wall 212, and the third enclosure box side wall 213 has the same folding direction as the first enclosure box side wall 211, so that the enclosure box piece 21 is a door-shaped structure with one side not closed (the cross-sectional figure is a rectangle with one side not closed), and the three enclosure box side walls form an opening. In this embodiment, the enclosure box 2 is composed of two enclosure box pieces 21 with the same structure and size that are relatively connected and arranged, and the openings of the two enclosure box pieces 21 are relatively arranged to enclose a complete rectangular enclosure box 2, and the enclosure box side walls of the two openings are connected to form a joint 5.

[0043] As shown in the figure, the second enclosure box side wall 212 is arranged to fit the inner surface of the first cover body side wall 102 (or the third cover body side wall 104), and the first enclosure box side wall 211 and the third enclosure box side wall 213 are respectively arranged to fit the inner surfaces of the second cover body side wall 103 and the fourth cover body side wall 105. The length of the first enclosure box side wall 211 and the third enclosure box side wall 213 is half of the length of the second cover body side wall 103 and the fourth cover body side wall 105 inside the end cover 1. The length of the second enclosure box side wall 212 is the same as the length of the first cover body side wall 102 and the third cover body side wall 104 inside the end cover 1, so that the two enclosure box parts 21 can be adapted to be relatively plugged into the inside of the end cover 1 to form a complete packaging box.

[0044] The manufacturing process of the packaging box described in this embodiment is as follows: first, corrugated cardboard is provided, die-cut and creasing are performed on the corrugated cardboard at a preset position, and then the end cover 1 and the box surrounding member 21 are folded respectively according to the creasing lines, and the box surrounding member 21 and the end cover 1 are assembled into a packaging box.

[0045] When packing the packaging box described in this embodiment, the bottom cover is placed on the pallet, and a box enclosure 21 is inserted into the bottom cover. After fixing, the packaging box is formed, and then the goods are stacked in the packaging box. When the goods are stacked to a predetermined height, another box enclosure 21 is inserted into the bottom cover, the top cover is covered, and the packaging tape is tied to complete the packaging of the goods. When disassembling, the packaging tape is cut, the top cover and a box enclosure 21 are removed, and after taking out the goods in turn, the other box enclosure 21 and the bottom cover are removed from the pallet. When loading and unloading goods, since the box enclosure 21 is two separate structural parts, it can be assembled and disassembled separately, and only one staff member is required to complete the entire assembly and disassembly process, and one of the box enclosures can be assembled last or disassembled first, making loading and unloading of goods more convenient and not affected by the height of the box enclosure.

[0046] Example 2

[0047] This embodiment provides a heavy-duty corrugated paper packaging box without glue or nails. Its structure is basically the same as the packaging box described in Example 1, except that the openings of the two box enclosures 21 facing each other are provided with mutually matching buckles 7, so that the two box enclosures 21 are connected by the buckles. Specifically, Figure 7 As shown, the first enclosure side wall 211 and the third enclosure side wall 213 of one enclosure member 21 are provided with male buckles, and the first enclosure side wall 211 and the third enclosure side wall 213 of the other enclosure member 21 are provided with female buckles that match the male buckles. When the openings of the two enclosure members 21 are arranged relative to each other, the male buckles and the complementary female buckles are buckled together (the buckles can be designed into different shapes as required), thus obtaining a more solid enclosure structure, which prevents the two enclosure members 21 from sliding or misaligning during transportation. The schematic diagram of the joint 5 of the two enclosure members 21 is shown in FIG. Figure 8 shown.

[0048] Example 3

[0049] This embodiment provides a heavy-duty corrugated paper packaging box without glue or nails, and its structure is basically the same as that of the first embodiment, except that the relative size and arrangement of the box enclosure 21 and the end cover 1 are different, such as Fig. 9 As shown, the packaging box structure is a box structure in which the openings of two enclosure members 21 are arranged facing each other, and one enclosure member 21 is arranged to fit the inner wall of the other enclosure member 21, so that the opening is closed, forming a side box with a double-layer corrugated paper structure. Fig. 9In the structure shown, in the enclosure member 21 close to the end cover 1, the length of the second enclosure side wall 212 is equal to the length of the first cover body side wall 102 (third cover body side wall 104) in the end cover, and the lengths of the first enclosure side wall 211 and the third enclosure side wall 213 are equal to the lengths of the second cover body side wall 103 and the fourth cover body side wall 105 in the end cover. In the enclosure member 21 far from the end cover 1, the length of the second enclosure side wall is equal to the inner edge length of the second enclosure side wall in the other enclosure member, and the lengths of the first enclosure side wall and the third enclosure side wall are equal to the inner edge lengths of the first enclosure side wall and the third enclosure side wall in the other enclosure member, so that the two enclosure members 21 are adapted to be stacked and inserted in the end cover 1, so that the side box 2 has a higher supporting strength.

[0050] Example 4

[0051] The present embodiment provides a heavy-duty corrugated paper packaging box connected without glue and nails, and its structure is basically the same as the packaging box described in Example 1, and is composed of an end cover 1 and a box 2. The box 2 is composed of two box parts 21 relatively spliced ​​together, and each box part 21 is composed of a first box side wall 211, a second box side wall 212 and a third box side wall 213 connected in sequence. The first box side wall 211, the third box side wall 213 and the second box side wall 212 are connected by a box indentation line 6. The difference is that the second box side wall 212 is also provided with a folding line 8 near the first box side wall 211 and the third box side wall 213. The folding line makes the second box side wall 212 have two folding parts, so that the final box becomes an octahedral cylindrical structure.

[0052] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A heavy-duty corrugated paper packaging box without glue and nail connection, characterized in that: The packaging box is composed of an end cover and a two-piece enclosure box, the two-piece enclosure boxes are arranged opposite to each other, the end cover includes a cover body, the outer periphery of the cover body is connected to a cover body side wall, the cover body side wall and the cover body enclose an open accommodating space, and the enclosure box is adapted to be inserted into the accommodating space of the end cover; The end cover comprises a top cover connected to the top of the enclosure box and a bottom cover connected to the bottom of the enclosure box, the top cover and the bottom cover have the same structure, and both comprise a rectangular cover body, the rectangular cover body is sequentially connected with a first cover body side wall, a second cover body side wall, a third cover body side wall and a fourth cover body side wall on all sides, a slot is provided at the connection between the first cover body side wall, the third cover body side wall and the cover body, and an insert tongue adapted to the slot is provided at the end of the first cover body side wall and the third cover body side wall away from the connection; Two ends of the second cover body side wall and the fourth cover body side wall are respectively connected with a flat fastener, and the flat fastener is fitted on the inner surface of the first cover body side wall and the third cover body side wall; The enclosure is composed of two enclosure parts, and the enclosure part is composed of a first enclosure side wall, a second enclosure side wall and a third enclosure side wall connected in sequence, and the first enclosure side wall and the third enclosure side wall are both arranged perpendicular to the second enclosure side wall so that the enclosure part has a door-shaped structure; The three enclosure side walls of the enclosure member form an opening, and the openings of the two enclosure members are arranged opposite to each other; the side edges of the first enclosure side wall and the third enclosure side wall of one enclosure member are provided with male buckles, and the side edges of the first enclosure side wall and the third enclosure side wall of the other enclosure member are provided with female buckles matched with the male buckles, and when the openings of the two enclosure members are arranged opposite to each other, the male buckles are buckled with the female buckles complementary thereto; The first cover body side wall and the third cover body side wall are both composed of a first overlapping portion and a second overlapping portion, the inserting tongue is arranged on the first overlapping portion, and the inserting slot is arranged on the second overlapping portion, and the first overlapping portion and the second overlapping portion are folded along the side wall folding line so that the inserting tongue is inserted into the inserting slot.

2. The heavy-duty corrugated paper packaging box without glue and nail connection according to claim 1 is characterized in that: The first cover side wall and the third cover side wall have the same size and structure, the second cover side wall and the fourth cover side wall have the same size and structure, and the width of the first cover side wall and the third cover side wall is twice the width of the second cover side wall and the fourth cover side wall.

3. The heavy-duty corrugated paper packaging box without glue and nail connection according to claim 2 is characterized in that: The three side walls of the enclosure form an opening, and the two enclosures have the same structure and size, and the openings arranged opposite to each other form a seamless joint.

4. The heavy-duty corrugated paper packaging box without glue and nail connection according to claim 3 is characterized in that: The first cover body side wall, the second cover body side wall, the third cover body side wall and the fourth cover body side wall are all connected to the cover body through the cover body indentation line, and the first cover body side wall, the second cover body side wall, the third cover body side wall and the fourth cover body side wall are folded along the cover body indentation line and are perpendicular to the cover body; the first enclosure box side wall and the second enclosure box side wall, and the second enclosure box side wall and the third enclosure box side wall are connected by the enclosure box indentation line, so that the first enclosure box side wall, the third enclosure box side wall and the second enclosure box side wall are perpendicular to the second enclosure box side wall.

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