Corrugated board and corrugated board packaging box thereof

Abstract

The invention relates to the field of paperboard packaging boxes, in particular to a corrugated paperboard and a corrugated paperboard packaging box thereof.The corrugated paperboard comprises an outer paperboard body, an inner paperboard body is arranged on one side of the outer paperboard body, a paper clamping plate is arranged between the outer paperboard body and the inner paperboard body, and an outer interlayer is formed between the paper clamping plate and the outer paperboard body; an inner interlayer is formed between the paper clamping plate and the inner paperboard, a thin film is pasted on the surface of the side, away from the paper clamping plate, of the outer paperboard, and the portion between the outer interlayer and the inner interlayer is filled with a wave paper core. When the corrugated board packaging box is closed by pushing the top plate to move downwards, the upper locking piece on the top of the corrugated board packaging box body pushes the locking column to move downwards to enter the lower locking piece, and the locking column in the middle is locked through the upper locking piece and the lower locking piece; and when the carton is subjected to a certain pressure, the locking columns can support the generated pressure, so that the strength of the corrugated board packaging box is guaranteed, and meanwhile, the convenience of a manufacturer and a purchaser during use is improved.

Description

Technical Field

[0001] The invention relates to the field of cardboard packaging boxes, in particular to a corrugated cardboard and a corrugated cardboard packaging box. Background Art

[0002] Corrugated cardboard, also known as corrugated cardboard, is a multi-layer adhesive body, which is made of at least one layer of wavy core paper interlayer and one or more layers of cardboard. The wavy core paper gives the cardboard high mechanical strength and good cushioning performance, and the corrugated cardboard packaging box is made of multiple different corrugated cardboards. The corrugated box has high compressive strength and impact resistance, and can effectively protect the internal items from damage during transportation and storage.

[0003] Ordinary corrugated paper packaging boxes have weak pressure resistance. When they are placed alone for transportation or subjected to a small amount of pressure, the corrugated paper packaging boxes will not be damaged. However, in actual use, the packaging boxes need to be stacked during transportation to facilitate the overall transportation of the product. When stacking, the bottom packaging box will be subjected to the pressure of the top packaging box, causing the side wall of the bottom packaging box to deform due to external force and the connection between the side walls to rupture, causing the stacked packaging boxes to collapse, resulting in damage to the internal items. Therefore, the patent application with patent publication number CN113184325B provides a pressure-resistant and moisture-proof corrugated paper packaging box and a preparation method thereof, which ensures the overall strength of the corrugated paper packaging box by setting a high-strength outer frame, but setting a high-strength outer frame will increase the overall production cost of the corrugated paper packaging box. At the same time, when using a high-strength outer frame, the outer frame needs to be installed and disassembled before packaging, which causes inconvenience to manufacturers and buyers when using it.

[0004] For this reason, a corrugated paperboard and a corrugated paperboard packaging box thereof are proposed. Summary of the invention

[0005] The object of the present invention is to provide a corrugated paperboard and a corrugated paperboard packaging box thereof, so as to solve the problem that setting a high-strength outer frame will lead to an increase in the overall production cost of the corrugated paper packaging box, and at the same time, the use of the high-strength outer frame requires installation and disassembly when packing or disassembling the package, causing inconvenience to manufacturers and buyers when using it.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A corrugated paperboard comprises an outer paperboard, an inner paperboard is arranged on one side of the outer paperboard, a paper sheet clamp is arranged between the outer paperboard and the inner paperboard, an outer interlayer is formed between the paper sheet clamp and the outer paperboard, an inner interlayer is formed between the paper sheet clamp and the inner paperboard, a film is pasted on a surface of the outer paperboard away from the paper sheet clamp, a corrugated paper core is filled between the outer interlayer and the inner interlayer, and the corrugated paper cores on both sides are cross-arranged at 90 degrees, a plurality of evenly arranged grooves are opened on the inner paperboard, the grooves penetrate the inner interlayer, and a drying sheet is placed in the grooves.

[0008] The wave directions of the two corrugated paper cores in the outer interlayer and the inner interlayer are arranged perpendicular to each other. The cross-arrangement can effectively disperse the pressure or load and prevent single-point overload, thereby improving the stability of the overall structure, making the strength of the corrugated cardboard higher. At the same time, the film is arranged on the outer cardboard to prevent moisture in the external air from soaking the cardboard and causing the cardboard to rupture. Of course, a drying sheet is arranged on the inner cardboard to prevent external air from entering the corrugated paper and soaking the internal cardboard.

[0009] Preferably, a hole is formed between the corrugated paper core and the paperboard, and two support columns are inserted into the hole. The intersection of the two support columns is located in the middle of the corrugated paper core, and the two support columns are cross-arranged at 90° to each other, one of the support columns is located in the corrugated paper core of the outer interlayer, and the other support column is located in the corrugated paper core of the inner interlayer, and the two support columns are injection molded by a polypropylene material using an injection molding machine.

[0010] A long through groove will be formed between the corrugated paper core, the outer cardboard and the paper plywood. At this time, the support column can be inserted into the through groove to provide structural support for the entire carton. The support columns in the inner interlayer are arranged horizontally, while the support columns in the outer interlayer are arranged vertically. As can be seen from the following text, the packaging box is provided with locking columns. When the longitudinal support columns are subjected to force, the pressure can be transferred to the locking columns through the horizontally arranged support columns to share the pressure, thereby further improving the compressive resistance of the corrugated cardboard.

[0011] Preferably, a corrugated cardboard packaging box is provided, the packaging box is formed by splicing the corrugated cardboards described above, and includes a packaging box body, two locking columns are slidably installed on the four side walls of the packaging box body, the axes of the locking columns are parallel to the vertical axes of the packaging box body, and the two locking columns are respectively located on the left and right sides of the side walls of the packaging box body, a lower locking piece is installed at the bottom of the packaging box body, and an upper locking piece is installed at the top of the packaging box body, when the packaging box body is loaded with products and the box lid is ready to be closed, the upper locking piece on the top of the packaging box body pushes the locking column downward to make it enter the lower locking piece.

[0012] The entire packaging box is first cut into a set shape from a piece of corrugated cardboard, and then creases are pressed out, and finally the packaging box body is folded through the creases. Because the packaging boxes need to be stacked during transportation to facilitate the overall transportation of the product, the bottom packaging box will be subjected to the pressure of the top packaging box during stacking, causing the side wall of the bottom packaging box to deform due to external force and the connection between the side walls to rupture, causing the stacked packaging boxes to collapse and causing damage to the internal items. Therefore, multiple locking columns are used to support the packaging boxes. When in use, the packaging box cover is covered on the packaging box, and the upper locking piece installed on the cover is used to squeeze the locking column below to make it enter the lower locking piece below, and the middle locking column is locked by the upper and lower locking pieces, so that when the carton is subjected to a certain pressure, the locking column can support the pressure generated to prevent the carton from collapsing.

[0013] Preferably, the lower locking member includes a sub-limit frame, a limit cylinder, and a mother limit frame, and the packaging box body is provided with a plurality of lower through holes, and the lower through holes are all located at the four corners of the bottom of the packaging box body, a sub-limit frame is placed at one end of the lower through hole, and the sub-limit frame is located inside the packaging box, the sub-limit frame is respectively composed of two limit cylinders, the interior of the limit cylinder is funnel-shaped, and the exterior of the limit cylinder is truncated, a mother limit frame is placed at the other end of the lower through hole, and the mother limit frame is located outside the packaging box body, one end of the mother limit frame extends into the lower through hole and is clamped with the sub-limit frame, the length of the sub-limit frame entering the lower through hole is a, and the length of the mother limit frame entering the lower through hole is b, and the clamping makes the combined length of a and b consistent with the thickness of the corrugated cardboard, and the other end of the mother limit frame is provided with an arc-shaped protrusion.

[0014] The lengths of the sub-limit frame and the mother limit frame entering the lower through hole are limited, so that the length of the junction of the sub-limit frame and the mother limit frame is equal to the thickness of the cardboard, to prevent the sub-limit frame from compressing the cardboard when the locking column is subjected to pressure to squeeze the sub-limit frame, causing damage to the cardboard. At the same time, an arc-shaped protrusion is provided at the other end of the mother limit frame, so that the bottom of the cardboard is supported, so that it has a certain ground clearance, to prevent liquid from affecting the bottom of the carton, and the two limit cylinders of the sub-limit frame are arranged in a funnel shape, so that the locking column is easier to enter and lock. At the same time, when subjected to pressure, the locking column can be stuck on the inner wall of the limit cylinder, to prevent the locking column from being stuck on the top plate after the packaging box is opened, making the top plate difficult to open.

[0015] Preferably, the side walls of the packaging box body are provided with side cardboards, one side of the side cardboards is inclined, and the other side of the side cardboards abuts against the top of the packaging box body, a plurality of evenly arranged circular holes are opened on the side cardboards, one side of the side cardboards is provided with a support frame placed in the circular hole, the locking column is slidably connected to the support frame, and the other side of the side cardboards is provided with a buckle placed in the circular hole, the buckle is snapped with the support frame, and the buckles on two adjacent side cardboards are different in shape, one end of the buckle on one side away from the circular hole is convex, and the other end of the buckle on the other side away from the circular hole is concave, so that when the corrugated cardboard is combined into a packaging box, the two adjacent buckles cooperate with each other, the locking column is provided with a protrusion, and when the locking column moves to a specified position, the protrusion abuts against the support frame.

[0016] The buckles on two adjacent side cardboards have different shapes, one side buckle is convex and the other side buckle is concave, so that when the corrugated cardboard is combined into a packaging box, the buckles on both sides can be snapped together. Of course, before the buckles are installed, round holes need to be opened on the side cardboards, the support frame is placed in the round hole, and the support frame is fixed by the buckles. The packaging box can be used multiple times through the buckles on both sides, which is more environmentally friendly. Of course, there is a protrusion on the locking column. When the locking column moves to the specified position, the protrusion abuts against the support frame to prevent the locking column from being accidentally lifted when the top plate is lifted, causing the packaging box to lose its support structure and need to be reinstalled, so the protrusion can facilitate the opening and closing of the top plate.

[0017] Preferably, the upper locking member includes a top plate, a pushing block, and a fixed block. The top of the packaging box body is provided with a top plate, and a plurality of upper through holes are formed on the top plate. The positions of the plurality of upper through holes correspond one to one with the positions of the lower through holes. A pushing block placed in the upper through hole is provided on one side of the top plate, and a circular groove is provided on the pushing block. A fixed block placed in the upper through hole is provided on the other side of the top plate, and the fixed block extends into the upper through hole and is clamped with the pushing block. A recessed pit is provided on the top of the fixed block, and the recessed pit cooperates with the protrusion.

[0018] Preferably, a limiting plate is fixedly mounted on the sub-limiting frame, and trapezoidal grooves are provided on both sides of the limiting plate. After the packaging box body is assembled, the side paperboards on both sides abut against the trapezoidal grooves.

[0019] By providing a trapezoidal groove on the limiting plate on the sub-limiting frame, the combined side cardboard can fit into the trapezoidal groove. Because the other side of the side cardboard abuts against the top of the packaging box body, when the top of the carton is subjected to pressure, the pressure on the locking column can be distributed through the side cardboard, and the generated pressure is transmitted to the main limiting frame through the limiting plate, so that the carton has stronger pressure resistance.

[0020] Preferably, one side surface of the side paperboard is provided with Velcro, and the Velcro is arranged on the side of the side paperboard close to the buckle. After the packaging box body is assembled, the Velcro on both sides fit together, and the two side paperboards are connected together by the Velcro and the buckle, so that the packaging box can be recycled.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. When packaging items, place the top plate on the corrugated cardboard packaging box. When the top plate is pushed down to close, the upper locking piece on the top of the corrugated cardboard packaging box body pushes the locking column down to enter the lower locking piece. The middle locking column is locked by the upper and lower locking pieces, so that when the carton is subjected to a certain pressure, the locking column can support the pressure generated, ensuring the strength of the corrugated cardboard packaging box while improving the convenience of manufacturers and buyers when using it.

[0023] 2. The carton is structurally supported by support columns. However, the support columns in the inner interlayer are arranged horizontally, while the support columns in the outer interlayer are arranged vertically. As will be known later in the text, the packaging box is provided with locking columns. When the longitudinal support columns are subjected to force, the pressure can be transferred to the locking columns through the horizontally arranged support columns to distribute the pressure, thereby further improving the compressive resistance of the corrugated cardboard.

[0024] 3. The other end of the mother limit frame is provided with an arc-shaped protrusion, so that the bottom of the cardboard has a certain ground clearance to prevent liquid from affecting the bottom of the carton. At the same time, a concave pit is opened on the top of the fixed block. The concave pit makes the packaging box more stable when stacking, and the two limit cylinders of the sub-limit frame are arranged in a funnel shape, making it easier for the locking column to enter and lock, so that the locking column can be stuck on the inner wall of the limit cylinder, to prevent the locking column from opening with the top plate after the packaging box is opened, causing the packaging box to lose support. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the unfolded structure of the packaging box of the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the packaging box of the present invention;

[0028] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0029] Figure 5 It is an enlarged structural schematic diagram of the fixed block in the present invention;

[0030] Figure 6 It is a schematic diagram of the internal structure of the paperboard in the present invention;

[0031] Figure 7 It is a schematic diagram of the enlarged structure of the locking column in the present invention;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the support frame in the present invention.

[0033] In the figure: 1. packaging box body; 101. inner cardboard; 102. corrugated paper core; 103. paper clip; 104. outer cardboard; 105. support column; 106. hole; 2. side cardboard; 3. support frame; 4. locking column; 5. sub-limit frame; 6. limit plate; 7. trapezoidal groove; 8. limit cylinder; 9. top plate; 10. fixing block; 11. concave pit; 12. mother limit frame; 13. convex block; 14. buckle; 15. protrusion; 16. push block; 17. lower through hole; 18. upper through hole; 19. round groove; 20. Velcro; 21. round hole. DETAILED DESCRIPTION

[0034] See also Figures 1 to 8 The present invention provides a corrugated cardboard and a corrugated cardboard packaging box, and the technical solution is as follows:

[0035] A corrugated paperboard comprises an outer paperboard 104, an inner paperboard 101 is arranged on one side of the outer paperboard 104, a paper sheet clamping plate 103 is arranged between the outer paperboard 104 and the inner paperboard 101, an outer interlayer is formed between the paper sheet clamping plate 103 and the outer paperboard 104, an inner interlayer is formed between the paper sheet clamping plate 103 and the inner paperboard 101, a film is pasted on the surface of the outer paperboard 104 away from the paper sheet clamping plate 103, a corrugated paper core 102 is filled between the outer interlayer and the inner interlayer, and the corrugated paper cores 102 on both sides are cross-arranged at 90 degrees, a plurality of evenly arranged grooves are opened on the inner paperboard 101, the grooves penetrate the inner interlayer, and drying sheets are placed in the grooves.

[0036] When corrugated cardboard is produced, the outer cardboard 104 is first laid flat on the equipment, and the corrugated paper core 102 is placed forward on the outer cardboard 104. The equipment sticks the corrugated paper core 102 on the outer cardboard 104 by glue, and then puts the paper plywood 103 for sealing, and also uses glue for connection. Of course, when placing another corrugated paper core 102, it is necessary to rotate the corrugated paper core 102 90° first, so that the wave directions of the two corrugated paper cores 102 in the outer interlayer and the inner interlayer are arranged perpendicular to each other. By cross-arranging each other, the pressure or load can be effectively dispersed to prevent single-point overload, thereby improving the stability of the overall structure, and making the strength of the corrugated cardboard higher. At the same time, a film is arranged on the outer cardboard 104 to prevent moisture in the external air from soaking the cardboard and causing the cardboard to rupture. Of course, a drying sheet is arranged on the inner cardboard 101 to prevent external air from entering the inside of the corrugated paper and impregnating the internal cardboard.

[0037] A hole 106 is formed between the corrugated paper core 102 and the paperboard, and two support columns 105 are inserted into the hole 106. The intersection of the two support columns 105 is located in the middle of the corrugated paper core 102, and the two support columns 105 are cross-arranged at 90 degrees to each other, one of the support columns 105 is located in the corrugated paper core 102 of the outer interlayer, and the other support column 105 is located in the corrugated paper core 102 of the inner interlayer, and the two support columns 105 are both made of polypropylene material by injection molding by an injection molding machine.

[0038] Because a long through groove is formed between the corrugated paper core 102, the outer cardboard 104 and the paper splint 103, the support column 105 can be inserted into the through groove at this time, and the support column 105 can provide structural support for the entire carton. Of course, because the wave directions of the two corrugated paper cores 102 in the outer interlayer and the inner interlayer are arranged perpendicular to each other, the long through grooves formed on both sides are also arranged perpendicular to each other, and the two supports placed therein are also arranged crosswise. It should be noted that the support column 105 in the inner interlayer is arranged horizontally, while the support column 105 in the outer interlayer is arranged vertically, because according to the following text, the packaging box is provided with a locking column 4, and when the longitudinal support column 105 is subjected to force, the pressure received can be transmitted to the locking column 4 through the horizontally arranged support column 105, so as to distribute the pressure, thereby further improving the compressive strength of the corrugated cardboard.

[0039] A corrugated cardboard packaging box, which is spliced ​​by the above-mentioned corrugated cardboards, includes a packaging box body 1, two locking columns 4 are slidably installed on the four side walls of the packaging box body 1, the axes of the locking columns 4 are parallel to the vertical axis of the packaging box body 1, and the two locking columns 4 are respectively located on the left and right sides of the side wall of the packaging box body 1, a lower locking piece is installed at the bottom of the packaging box body 1, and an upper locking piece is installed at the top of the packaging box body 1. When the packaging box body 1 is loaded with products and the box cover is ready to be closed, the upper locking piece on the top of the packaging box body 1 pushes the locking column 4 downward to make it enter the lower locking piece.

[0040] The entire packaging box is first cut into a set shape from a piece of corrugated cardboard, and then creases are pressed out, and finally folded through the creases to form a packaging box body 1. Because the packaging boxes need to be stacked during transportation to facilitate the overall transportation of the product, the bottom packaging box will be subjected to the pressure of the top packaging box during stacking, causing the side wall of the bottom packaging box to deform due to external force and the connection between the side walls to rupture, causing the stacked packaging boxes to collapse, resulting in damage to the internal items. Therefore, multiple locking columns 4 are used to support the packaging boxes. When in use, the packaging box cover is covered on the packaging box, and the upper locking piece installed on the cover is used to squeeze the lower locking column 4 so that it enters the lower locking piece below, and the middle locking column 4 is locked by the upper and lower locking pieces, so that when the carton is subjected to a certain pressure, the locking column 4 can support the pressure generated to prevent the carton from collapsing.

[0041] The lower locking member includes a sub-limiting frame 5, a limiting cylinder 8, and a female limiting frame 12. A plurality of lower through holes 17 are provided on the packaging box body 1. The lower through holes 17 are all located at the four corners of the bottom of the packaging box body 1. A sub-limiting frame 5 is placed at one end of the lower through hole 17. The sub-limiting frame 5 is located inside the packaging box. The sub-limiting frame 5 is composed of two limiting cylinders 8 respectively. The interior of the limiting cylinder 8 is funnel-shaped, and the exterior of the limiting cylinder 8 is truncated. A female limiting frame 12 is placed at the other end of the lower through hole 17. The female limiting frame 12 is located outside the packaging box body 1. One end of the female limiting frame 12 extends into the lower through hole 17 and is clamped with the sub-limiting frame 5. The length of the sub-limiting frame 5 entering the lower through hole 17 is a, and the length of the female limiting frame 12 entering the lower through hole 17 is b. The clamping makes the combined length of a and b consistent with the thickness of the corrugated cardboard. An arc-shaped protrusion 13 is provided at the other end of the female limiting frame 12.

[0042] Before packaging, the packaging cardboard needs to be processed, and holes are punched at each corresponding position of the cardboard, and the sub-limiting frame 5 is placed therein, so that the two limiting tubes 8 of the sub-limiting frame 5 enter the lower through holes 17 opened on the cardboard respectively, and the cardboard is turned over and glue is applied to the main limiting frame 12, and the main limiting frame 12 is placed in the lower through hole 17, so that the main limiting frame 12 and the sub-limiting frame 5 are mutually engaged, and the middle cardboard is clamped by the main limiting frame 12 and the sub-limiting frame 5, and they are limited, and the length of the sub-limiting frame 5 and the main limiting frame 12 entering the lower through hole 17 is limited, so that the length of the junction of the sub-limiting frame 5 and the main limiting frame 12 is equal to the thickness of the cardboard, so as to prevent the locking column 4 from being subjected to pressure on the sub-limiting frame When the positioning frame 5 is squeezed, the sub-limiting frame 5 compresses the cardboard, causing the cardboard to be damaged. At the same time, the other end of the main limiting frame 12 is provided with an arc-shaped protrusion 13, so that the bottom of the cardboard is supported, so that it has a certain ground clearance to prevent the bottom of the carton from being affected by the liquid, and the two limiting cylinders 8 of the sub-limiting frame 5 are arranged in a funnel shape, so that the locking column 4 is easier to enter therein for locking. At the same time, the locking column 4 can be stuck on the inner wall of the limiting cylinder 8 when under pressure, so as to prevent the locking column 4 from being stuck on the top plate 9 after the packaging box is opened, causing the locking column to be lifted up after the top plate 9 is opened, so that the user needs to reinsert the locking column into the supporting frame 3, thereby improving the convenience of the user when packaging or disassembling.

[0043] A side cardboard 2 is provided on the side wall of the packaging box body 1. One side of the side cardboard 2 is inclined, and the other side of the side cardboard 2 abuts against the top of the packaging box body 1. A plurality of evenly arranged circular holes 21 are opened on the side cardboard 2. A support frame 3 placed in the circular hole 21 is provided on one side of the side cardboard 2. A locking column 4 is slidably connected to the support frame 3. A buckle 14 placed in the circular hole 21 is provided on the other side of the side cardboard 2. The buckle 14 is snapped with the support frame 3, and the buckles 14 on two adjacent side cardboards 2 have different shapes. One end of the buckle 14 on one side away from the circular hole 21 is convex, and the other end of the buckle 14 on the other side away from the circular hole 21 is concave, so that when the corrugated cardboard is combined into a packaging box, the two adjacent buckles 14 cooperate with each other. A protrusion 15 is provided on the locking column 4. When the locking column 4 moves to a specified position, the protrusion 15 abuts against the support frame 3. A limiting plate 6 is fixedly mounted on the sub-limiting frame 5, and trapezoidal grooves 7 are provided on both sides of the limiting plate 6. After the packaging box body 1 is assembled, the side paperboards 2 on both sides abut against the trapezoidal grooves 7. A Velcro 20 is provided on one side of the side paperboard 2, and the Velcro 20 is arranged on one side of the side paperboard 2 close to the buckle 14. After the packaging box body 1 is assembled, the Velcro 20 on both sides fit each other.

[0044] The side cardboard 2 is used to connect the two side cardboards of the packaging box. One side of the side cardboard 2 is inclined. The inclined side can be formed by cutting a whole cardboard. When the cardboards on both sides are attached together, they can be attached by the Velcro 20 on the side cardboard 2, so that the two side cardboards 2 of the packaging box are combined together. Of course, because the buckles 14 on the two adjacent side cardboards 2 are different in shape, the buckle 14 on one side is convex and the buckle 14 on the other side is concave, when the corrugated cardboard is combined into a packaging box, the buckles 14 on both sides can be snapped together, and the two side cardboards 2 are connected by the Velcro 20 and the buckle 14. Together, the packaging box can be recycled. Of course, before the installation of the buckle 14, a round hole 21 needs to be opened on the side cardboard 2, the support frame 3 is placed in the round hole 21, and the support frame 3 is fixed by the buckle 14. By opening a trapezoidal groove 7 on the limiting piece 6 on the sub-limiting frame 5, the combined side cardboard 2 can fit in the trapezoidal groove 7. Because the other side of the side cardboard 2 is in contact with the top of the packaging box body 1, the pressure on the locking column 4 can be shared by the side cardboard 2 after the top of the carton is subjected to pressure, and the generated pressure is transmitted to the main limiting frame 12 through the limiting piece 6, so that the pressure resistance of the carton is stronger.

[0045] The upper locking member includes a top plate 9, a push block 16, and a fixed block 10. The top plate 9 is provided on the top of the packaging box body 1. A plurality of upper through holes 18 are provided on the top plate 9. The positions of the plurality of upper through holes 18 correspond one to one with the positions of the lower through holes 17. A push block 16 placed in the upper through hole 18 is provided on one side of the top plate 9. A circular groove 19 is provided on the push block 16. A fixed block 10 placed in the upper through hole 18 is provided on the other side of the top plate 9. The fixed block 10 extends into the upper through hole 18 and is clamped with the push block 16. A recessed pit 11 is provided on the top of the fixed block 10, and the recessed pit 11 cooperates with the protrusion 13.

[0046] Of course, the push block 16 and the fixed block 10 on the top plate 9 are also fixed and installed by opening circular holes. When in use, the top plate 9 is covered on the packaging box body 1. When closing downward, the push block 16 abuts against the locking column 4, so that the locking column 4 enters the circular groove 19 on the push block 16, and the locking column 4 is pushed into the female limit frame 12 below by squeezing. Of course, because it is a circular groove 19, the circular groove 19 will not be stuck with the locking column 4, resulting in the locking column 4 being lifted up after the top plate 9 is opened, and a concave pit 11 is opened on the top of the fixed block 10. By setting the concave pit 11, when the packaging boxes are stacked, the protrusion 13 on the female limit frame 12 at the bottom of the upper packaging box can fit into the concave pit 11, making the stacking of the packaging boxes more stable.

[0047] When in use, cut the cardboard into the shape of a cross, and insert the support column 105 into the cardboard through the gap on the side. It should be noted that the support column 105 in the inner interlayer is arranged horizontally, while the support column 105 in the outer interlayer is arranged vertically. The cardboard is bent so that it can form a packaging box after folding.

[0048] Before packaging, the packaging cardboard needs to be processed, holes are punched at each corresponding position of the cardboard, holes are punched on the bottom, top plate 9 and side cardboard 2 of the carton, and the sub-limiting frame 5 is placed therein, so that the two limiting tubes 8 of the sub-limiting frame 5 respectively enter the lower through holes 17 opened on the cardboard, the cardboard is turned over, glue is applied on the main limiting frame 12, and the main limiting frame 12 is placed in the lower through hole 17, so that the main limiting frame 12 and the sub-limiting frame 5 are mutually clamped, and the middle cardboard is clamped by the main limiting frame 12 and the sub-limiting frame 5 to limit them.

[0049] The support frame 3 is placed in the round hole 21 and fixed to the support frame 3 by the buckle 14. It should be noted that the buckles 14 on the two adjacent side cardboards 2 have different shapes. The end of the buckle 14 on one side away from the round hole 21 is convex, and the end of the buckle 14 on the other side away from the round hole 21 is concave, so that when the corrugated cardboard is combined into a packaging box, the two adjacent buckles 14 cooperate with each other. At the same time, the locking column 4 is placed on the support frame 3 to move it on it. When the cardboards on both sides are attached together, they can be attached through the Velcro 20 on the side cardboard 2, so that the two side cardboards 2 of the packaging box are combined together. Of course, because the buckles 14 on the two adjacent side cardboards 2 have different shapes, the buckle 14 on one side is convex, and the buckle 14 on the other side is concave, when the corrugated cardboard is combined into a packaging box, the buckles 14 on both sides can be snapped together.

[0050] Of course, the pushing block 16 and the fixing block 10 on the top plate 9 are also fixed and installed by opening circular holes. When in use, the top plate 9 is covered on the packaging box body 1. When closing downward, the pushing block 16 abuts against the locking column 4, so that the locking column 4 enters the circular groove 19 on the pushing block 16, and the locking column 4 is pushed into the female limit frame 12 below by squeezing. Of course, because it is a circular groove 19, it will not be stuck with the locking column 4, making the top plate 9 difficult to open. At the same time, a protrusion 15 is provided on the locking column 4. When the locking column 4 moves to the specified position, the protrusion 15 abuts against the support frame 3 to avoid the locking column 4 following the top plate 9 to move up when the top plate 9 is taken out, causing the locking column 4 to be taken out, so that the user needs to reinsert the locking column into the support frame 3, thereby improving the convenience of the user when packaging or disassembling.

[0051] By opening a trapezoidal groove 7 on the limiting plate 6 on the sub-limiting frame 5, the combined side cardboard 2 can fit into the trapezoidal groove 7. Because the other side of the side cardboard 2 abuts against the top of the packaging box body 1, when the top of the carton is subjected to pressure, the pressure on the locking column 4 can be shared through the side cardboard 2, so that the generated pressure is transmitted to the main limiting frame 12 through the limiting plate 6.

[0052] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A corrugated paperboard, characterized in that: The invention comprises an outer paperboard (104), an inner paperboard (101) is arranged on one side of the outer paperboard (104), a paper sheet clamp (103) is arranged between the outer paperboard (104) and the inner paperboard (101), an outer interlayer is formed between the paper sheet clamp (103) and the outer paperboard (104), an inner interlayer is formed between the paper sheet clamp (103) and the inner paperboard (101), a film is pasted on the surface of the outer paperboard (104) away from the paper sheet clamp (103), a corrugated paper core (102) is filled between the outer interlayer and the inner interlayer, and the corrugated paper cores (102) on both sides are arranged crosswise at 90 degrees, and a plurality of evenly arranged grooves are opened on the inner paperboard (101), the grooves penetrate the inner interlayer, and a drying sheet is placed in the grooves.

2. A corrugated paperboard according to claim 1, characterized in that A hole (106) is formed between the corrugated paper core (102) and the paperboard, and two support columns (105) are inserted into the hole (106). The intersection of the two support columns (105) is located in the middle of the corrugated paper core (102), and the two support columns (105) are arranged to cross each other at 90 degrees, one of the support columns (105) is located in the corrugated paper core (102) of the outer interlayer, and the other support column (105) is located in the corrugated paper core (102) of the inner interlayer, and the two support columns (105) are both made of polypropylene material by injection molding by an injection molding machine.

3. A corrugated cardboard packaging box, characterized in that The packaging box is formed by splicing the corrugated cardboard described in any one of claims 1 to 2 above, and includes a packaging box body (1), and two locking columns (4) are slidably installed on the four side walls of the packaging box body (1), the axis of the locking column (4) is parallel to the vertical axis of the packaging box body (1), and the two locking columns (4) are respectively located on the left and right sides of the side wall of the packaging box body (1), and a lower locking piece for supporting the locking column (4) is installed at the bottom of the packaging box body (1), and an upper locking piece for limiting the locking column (4) is installed at the top of the packaging box body (1). When the packaging box body (1) is loaded with products and the box cover is ready to be closed, the upper locking piece on the top of the packaging box body (1) pushes the locking column (4) downward to make it enter the lower locking piece.

4. A corrugated cardboard packaging box according to claim 3, characterized in that The lower locking member comprises a sub-limiting frame (5), a limiting cylinder (8), and a main limiting frame (12); a plurality of lower through holes (17) are provided on the packaging box body (1); the lower through holes (17) are all located at the four corners of the bottom of the packaging box body (1); a sub-limiting frame (5) is placed at one end of the lower through hole (17); the sub-limiting frame (5) is located inside the packaging box; the sub-limiting frame (5) is respectively composed of two limiting cylinders (8); the inside of the limiting cylinder (8) is funnel-shaped; the outside of the limiting cylinder (8) is truncated; the lower A female limit frame (12) is placed at the other end of the through hole (17). The female limit frame (12) is located outside the packaging box body (1). One end of the female limit frame (12) extends into the lower through hole (17) and is snap-connected with the sub-limit frame (5). The length of the sub-limit frame (5) entering the lower through hole (17) is a, and the length of the female limit frame (12) entering the lower through hole (17) is b. The snap connection makes the combined length of a and b consistent with the thickness of the corrugated cardboard. The other end of the female limit frame (12) is provided with an arc-shaped protrusion (13).

5. A corrugated cardboard packaging box according to claim 4, characterized in that The side walls of the packaging box body (1) are each provided with a side paperboard (2), one side of the side paperboard (2) is inclined, the other side of the side paperboard (2) is in contact with the top of the packaging box body (1), a plurality of evenly arranged circular holes (21) are opened on the side paperboard (2), one side of the side paperboard (2) is provided with a support frame (3) placed in the circular hole (21), the locking column (4) is slidably connected to the support frame (3), the other side of the side paperboard (2) is provided with a buckle (14) placed in the circular hole (21), The buckle (14) is snap-connected with the support frame (3), and the buckles (14) on two adjacent side paperboards (2) have different shapes, one end of the buckle (14) on one side away from the round hole (21) is convex, and the other end of the buckle (14) on the other side away from the round hole (21) is concave, so that when the corrugated paperboards are combined into a packaging box, the two adjacent buckles (14) cooperate with each other, and the locking column (4) is provided with a protrusion (15), and when the locking column (4) moves to a specified position, the protrusion (15) abuts against the support frame (3).

6. A corrugated cardboard packaging box according to claim 5, characterized in that The upper locking member comprises a top plate (9), a pushing block (16), and a fixing block (10). The top of the packaging box body (1) is provided with a top plate (9), and a plurality of upper through holes (18) are provided on the top plate (9). The positions of the plurality of upper through holes (18) correspond to the positions of the lower through holes (17) one to one. A pushing block (16) placed in the upper through hole (18) is provided on one side of the top plate (9), and a circular groove (19) is provided on the pushing block (16). A fixing block (10) placed in the upper through hole (18) is provided on the other side of the top plate (9). The fixing block (10) extends into the upper through hole (18) and is clamped with the pushing block (16). A concave pit (11) is provided on the top of the fixing block (10), and the concave pit (11) cooperates with the protrusion (13).

7. A corrugated cardboard packaging box according to claim 6, characterized in that A limiting plate (6) is fixedly mounted on the sub-limiting frame (5), and trapezoidal grooves (7) are provided on both sides of the limiting plate (6). After the packaging box body (1) is assembled, the side paperboards (2) on both sides abut against the trapezoidal grooves (7).

8. A corrugated cardboard packaging box according to claim 5, characterized in that A Velcro (20) is provided on one side surface of the side paperboard (2), and the Velcro (20) is arranged on a side of the side paperboard (2) close to the buckle (14). After the packaging box body (1) is assembled, the Velcro (20) on both sides are attached to each other.

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