Corrugated paperboard, packaging box and preparation method

Abstract

The present invention relates to the technical field of packaging boxes, and proposes a corrugated paperboard, a packaging box and a preparation method, comprising corrugated paperboard, a side seal, a reinforcement strip, a support rod and face paper, wherein the corrugated paperboard is in a wavy structure; the side seal strip surrounds the edge of the corrugated paperboard; the reinforcement strip is arranged at the concave part of the corrugated paperboard, and the two sides of the corrugated paperboard are provided with reinforcement strips; the reinforcement strip on one side of the corrugated paperboard is provided with a support rod; the face paper is provided on both sides of the corrugated paperboard, and the face paperboard is bonded to the side seal strip and the support rod; the side seal strip, the reinforcement strip and the support rod are thermosetting materials, and are provided as an integrated structure. The present invention arranges the side seal strip at the edge of the corrugated paperboard, and at the same time arranges the reinforcement strip at the concave part of the corrugated paperboard, the end of the reinforcement strip is connected to the inner side of the side seal strip, and the support rod is also provided on the reinforcement strip, so that the structural strength of the corrugated paperboard can be effectively improved, and its compression resistance and tear resistance can be significantly improved, and the structure is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging boxes, and in particular to a corrugated paperboard, a packaging box and a preparation method thereof. Background Art

[0002] Corrugated boxes are a common packaging material. Most of the corrugated paperboards used in current corrugated boxes are composed of a middle corrugated paper core and two side paper bonded together. Due to its advantages such as environmental protection, lightness and recyclability, it has been widely used in all walks of life and has become an important part of modern logistics. It is widely used in the packaging of various products.

[0003] The existing invention patent application with application publication number CN106144213A discloses a corrugated paperboard box, the paperboard of which includes boxboard and at least one layer of corrugated base paper, wherein the paperboard also includes a waterproof breathable membrane, which is set as the inner layer of the paperboard.

[0004] The corrugated paper box in the above scheme is a commonly used structure for existing corrugated paper boxes. This type of corrugated paper box is easily damaged, especially during transportation and handling, it is easy to be torn or flattened, and the load-bearing capacity is insufficient. At present, the structure of the box is strengthened by changing the material of the face paper and corrugated paper, but due to the structural limitations of its thin product, the strength improvement is not ideal, so it is urgently needed. Summary of the invention

[0005] In view of this, the present invention proposes a corrugated paperboard, a packaging box and a preparation method that can effectively improve strength and is easy to connect and form, so as to solve the problem that the existing corrugated paperboard box is not improved well enough and has poor structural strength.

[0006] The technical solution of the present invention is achieved in this way:

[0007] In one aspect, the present invention provides a corrugated paperboard, comprising corrugated paper, side seals, reinforcing strips, support rods and face paper, wherein:

[0008] Corrugated paper has a wavy structure;

[0009] The side seals go around the edges of the corrugated paper;

[0010] The reinforcement strip is arranged at the concave part of the corrugated paper, and the reinforcement strip is arranged on both sides of the corrugated paper;

[0011] A support rod is provided on the reinforcing strip on one side of the corrugated paper;

[0012] The face paper is provided on both sides of the corrugated paper, and the face paper is bonded to the side seals and the support rods;

[0013] The side seals, reinforcement strips and support rods are made of thermosetting materials and are arranged as an integral structure.

[0014] On the other hand, the present invention provides a packaging box, comprising the above-mentioned corrugated paperboard, the corrugated paperboard is used to prepare the box body and side panels, and the packaging box also includes a support plate and a retaining frame, wherein:

[0015] The box body is a rectangular cylindrical structure, with both ends of the box body connected;

[0016] Two support plates are provided, and the two support plates are arranged at the same end of the box body and are arranged oppositely on two sides of the box body;

[0017] The side panels are arranged on the side of the support plate away from the box body, and on the other six side panels at both ends of the box body;

[0018] When the packaging box is unfolded, the box surface, support panels and side panels are level;

[0019] After the packaging box is folded, the connection between the support plate and the box body is folded, and the middle part of the support plate is folded, so that the support plate is turned out relative to the box body to form a supporting part;

[0020] The retaining frame is sleeved on the box body and abuts against the abutting part;

[0021] A pre-fold is arranged in the middle of the support plate, and notches are arranged on both sides of the pre-fold.

[0022] On the basis of the above technical solution, preferably, the retaining frame includes a frame body and a pressure plate, wherein the frame body is sleeved on the box body;

[0023] The pressing plate is arranged on the frame body, and the pressing plate presses the side plate on one end of the box body away from the supporting plate.

[0024] On the basis of the above technical solution, preferably, the frame includes angle plates, transverse plates, pull plates and end plates, wherein:

[0025] There are four corner panels to fit the corners of the box;

[0026] Three transverse plates are arranged in parallel between any two adjacent angle plates, the ends of the transverse plates are connected to the angle plates, and at least one transverse plate protrudes inwards and is elastic;

[0027] The pull plate is arranged on a horizontal plate protruding inwardly;

[0028] The end plate is arranged on any transverse plate, the width of the end plate is R1, the width of the abutting portion formed after the support plate is folded is R2, and R2≥R1.

[0029] On the basis of the above technical solution, preferably, one end of the transverse plate protruding inward is connected to the angle plate;

[0030] The angle plate at the other end of the horizontal plate is provided with a card slot, and the card slot is used for plugging the end of the horizontal plate.

[0031] On the basis of the above technical solution, preferably, it further comprises a hanging plate, the hanging plate comprises a connecting plate and a card plate, and the box body is provided with a first through hole, wherein,

[0032] One end of the connecting plate is connected to the horizontal plate;

[0033] The card plate is arranged on the connecting plate, the card plate is engaged in the first through hole, and a second through hole is opened at a portion of the connecting plate corresponding to the card plate.

[0034] On the basis of the above technical solution, preferably, it further comprises a sticker, the sticker comprises a first part and a second part, wherein:

[0035] One side of the first part is bonded to the box body, and the other side is used for bonding the tape;

[0036] The second part is connected to the side of the first part facing the support plate.

[0037] On the basis of the above technical solution, preferably, among the three horizontal plates, the horizontal plate far away from the supporting plate presses the paper.

[0038] On the basis of the above technical solution, preferably, the retaining frame is made of plastic material, and thinning areas are provided on two of the four corner plates that are diagonally arranged.

[0039] In another aspect, the present invention provides a method for preparing a corrugated paperboard, which is used to prepare the above-mentioned corrugated paperboard, comprising the following steps:

[0040] S1, preparing corrugated paper and facial paper;

[0041] S2. Using a mold, injecting a thermosetting material into the corrugated paper to form side seals, reinforcement strips and support rods;

[0042] S3. Hot-melt the surface of the side seal and the end of the support rod, and bond the surface paper.

[0043] The corrugated paperboard, packaging box and preparation method of the present invention have the following beneficial effects compared with the prior art:

[0044] (1) By setting side seals on the edges of corrugated paper, the tear resistance of corrugated paper can be effectively improved, and the anti-extrusion ability can be improved to a certain extent; at the same time, a reinforcing strip is set at the concave part of the corrugated paper, and the end of the reinforcing strip is connected to the inner side of the side seal, which can further improve the anti-extrusion ability and fully ensure the structural strength of the corrugated paperboard; in this structure, in order to ensure that the face paper is firmly pasted, a support rod is also set on the reinforcing strip, so that the reinforcing strip and the support rod not only achieve stable support, but also provide more bonding positions for the face paper, so as to ensure that each layer of material has a stable structure after being stacked and bonded;

[0045] (2) By providing a support plate for connecting the side plates, after the support plate is folded relative to the box body, a supporting portion is formed. At this time, after the retaining frame is sleeved on the box body, the supporting portion will limit the retaining frame to prevent the retaining frame from being separated from the box body. At the same time, the retaining frame can effectively improve the structural strength of the box body, thereby improving the compression and tearing resistance of the packaging box body, thereby ensuring the application strength; and after the packaging box body is damaged, the retaining frame can be disassembled and reused, thereby reducing the application cost;

[0046] (3) The retainer is provided with a pressing plate, so that after the side panels on the box body are folded and the retainer is installed, the pressing plate can be used to press the side panels on the box body to prevent the side panels from opening, so there is no need to use tape to seal them; and after the retainer is removed, the box body can be opened, which improves the convenience of sealing and unpacking;

[0047] (4) The frame of the cage is provided with an angle plate and a transverse plate, and the angle plate can be used to clamp the cage to the edge of the box. One of the transverse plates protrudes inward and is elastic, so that the cage can be effectively clamped to the box to further improve the application stability of the cage and prevent it from detaching from the box;

[0048] (5) By providing a hanging plate, it can be connected to the first through hole on the box body by using the card plate, so as to limit the holding frame and prevent it from sliding on the box body, which increases the installation stability of the holding frame; at the same time, the connecting plate is provided with a second through hole, so that it is convenient to hold during transportation, thereby improving the convenience of carrying the packaging box;

[0049] (6) A sticker is provided on the box body, and only the first part of the sticker is bonded to the box body. When the box is sealed with tape, the end of the tape can be bonded to the sticker, so that the sticker and tape can be completely torn off with the second part, thereby improving the convenience of unpacking;

[0050] (7) Since the inwardly protruding horizontal plate is provided, when the retaining frame is removed, the second part of the sticker can be scraped up, thereby further improving the convenience of tearing off the sticker and the tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] 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.

[0052] Figure 1 A three-dimensional diagram of a corrugated paperboard of the present invention;

[0053] Figure 2 is a cross-sectional view of the corrugated paperboard of the present invention;

[0054] Figure 3 An exploded view of the corrugated paperboard of the present invention;

[0055] Figure 4 It is a structural diagram of the connecting rod of the corrugated paperboard and the separation of the corrugated paperboard of the present invention;

[0056] Figure 5 A three-dimensional diagram of a packaging box of the present invention with the retaining frame removed;

[0057] Figure 6 For the present invention Figure 5 A magnified view of the structure at point A;

[0058] Figure 7 This is a structural diagram of the side panel opening of the packaging box of the present invention;

[0059] Figure 8 A fully expanded view of the packaging box of the present invention;

[0060] Fig. 9 For the present invention Figure 8 A magnified view of the structure at point B;

[0061] Fig.10 A three-dimensional diagram of a retaining frame of a packaging box of the present invention;

[0062] Fig.11 A second perspective view of the retaining frame of the packaging box of the present invention;

[0063] Fig.12 For the present invention Fig.11 A magnified view of the structure of point C in FIG.

[0064] Fig.13 A three-dimensional diagram of a hanging plate of a packaging box of the present invention;

[0065] Fig.14 is a three-dimensional diagram of a packaging box of the present invention;

[0066] In the figure: 100, corrugated paper; 200, side seal; 300, reinforcement strip; 400, support rod; 500, face paper; 5001, support layer; 5002, face layer; 1, box body; 101, first through hole; 2, support plate; 201, pre-fold; 202, notch; 3, side plate; 4, retaining frame; 41, frame body; 411, angle plate; 412, cross plate; 413, pull plate; 414, end plate; 42, pressure plate; 401, card slot; 402, thinning area; 5, hanging plate; 51, connecting plate; 52, card plate; 501, second through hole; 6, sticker; 61, first part; 62, second part; 00, supporting part. DETAILED DESCRIPTION

[0067] The following will be combined with 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.

[0068] The corrugated paperboard of the present invention comprises corrugated paper 100 , side sealing strips 200 , reinforcing strips 300 , supporting rods 400 and face paper 500 .

[0069] like Figures 1 to 4 As shown, the corrugated paper 100 has a wavy structure; the side seal 200 surrounds the edge of the corrugated paper 100; the reinforcing strip 300 is arranged in the depression of the corrugated paper 100, and the reinforcing strip 300 is arranged on both sides of the corrugated paper 100; a support rod 400 is arranged on the reinforcing strip 300 on one side of the corrugated paper 100; the face paper 500 is arranged on both sides of the corrugated paper 100, and the face paper 500 is bonded to the side seal 200 and the support rod 400; the side seal 200, the reinforcing strip 300 and the support rod 400 are thermosetting materials and are arranged as an integrated structure.

[0070] As described above, the corrugated paperboard in the present invention is mainly made of multiple layers of materials, wherein the corrugated paper 100 is used as the middle layer;

[0071] By arranging the side seal 200 at the edge of the corrugated paper 100, the tear resistance of the corrugated paper 100 can be effectively improved, and the anti-extrusion ability can be improved to a certain extent; at the same time, a reinforcing strip 300 is arranged at the concave part of the corrugated paper 100, and the end of the reinforcing strip 300 is connected to the inner side of the side seal 200, so that the anti-extrusion ability can be further improved, and the structural strength of the corrugated paperboard can be fully guaranteed;

[0072] In this structure, in order to ensure that the facial paper 500 is firmly pasted, a support rod 400 is also provided on the reinforcing strip 300. In this way, the reinforcing strip 300 and the support rod 400 not only achieve stable support, but also provide more bonding positions for the facial paper 500 to ensure that the materials have a stable structure after stacking and bonding, thereby improving the anti-extrusion ability of the corrugated cardboard and preventing the facial paper 500 from being easily torn and damaged.

[0073] Specifically, the facial tissue 500 is composed of a supporting layer 5001 and a surface layer 5002, wherein the supporting layer 5001 can be formed by cutting a hard board, such as a plastic plate, and the surface layer 5002 can be made of conventional carton materials to play the role of outer packaging, printing and decoration; the supporting layer 5001 and the surface layer 5002 can be connected by bonding.

[0074] The method for preparing corrugated paperboard of the present invention comprises the following steps:

[0075] S1, preparing corrugated paper 100 and facial paper 500;

[0076] S2, using a mold to inject a thermosetting material into the corrugated paper 100 to form a side seal 200, a reinforcement strip 300 and a support rod 400;

[0077] S3, hot-melt the surface of the side seal 200 and the end of the support rod 400, and adhere the face paper 500.

[0078] In this method, a corrugated paper 100 is placed through a mold, and then injection molding is performed to form a side seal 200, a reinforcing strip 300 and a support rod 400 of an integrated structure; specifically, the side seal 200 is connected to the end of the reinforcing strip 300, and the support rod 400 is arranged on the reinforcing strip 300, so it is an integrated structure, which is convenient for injection molding;

[0079] Since the side seal 200, the reinforcing strip 300 and the support rod 400 of the corrugated board of the present invention are made of thermosetting materials and are arranged as an integrated structure, during assembly, the ends of the side seal 200 and the support rod 400 are directly hot-melted and the surface paper 500 are bonded, which can effectively improve the convenience of production.

[0080] In some embodiments, support rods 400 are provided on the reinforcement strips 300 on both sides of the corrugated paper 100;

[0081] In some embodiments, the protruding portions on both sides of the corrugated paper 100 are coated with adhesive to bond the face paper 500 instead of connecting by hot melting.

[0082] The packaging box of the present invention comprises the above-mentioned corrugated paperboard, wherein the corrugated paperboard is used to prepare a box body 1 and side panels 3 , and the packaging box further comprises a support plate 2 and a retaining frame 4 .

[0083] like Figures 5 to 9 and Fig.14 As shown, the box body 1 is a rectangular cylindrical structure, and the two ends of the box body 1 are connected; two support plates 2 are provided, and the two support plates 2 are arranged at the same end of the box body 1 and are arranged on two sides of the box body 1 opposite to each other; a side plate 3 is provided on the side of the support plate 2 away from the box body 1, and one is provided on each of the other six sides at both ends of the box body 1; when the packaging box is unfolded, the box surface of the box body 1, the support plate 2 and the side plate 3 are flat; after the packaging box is folded, the connection between the support plate 2 and the box body 1 is folded, and the middle part of the support plate 2 is folded, so that the support plate 2 is turned out relative to the box body 1 to form a supporting portion 00; the retaining frame 4 is sleeved on the box body 1 and abuts against the supporting portion 00;

[0084] For the above structure, please refer to the attached Figure 8 , which is an expanded view of the box body 1, the support plate 2 and the side plate 3; the side with the support plate 2 in the figure is the bottom end of the box body 1, and the opposite end is the top end;

[0085] When using the present packaging box, first fold the side panel 3 directly connected to the bottom end of the box body 1, then fold the support panel 2, at this time the support panel 2 and the side panel 3 protrude to the outside of the box body 1, then fold the middle part of the support panel 2, half of the support panel 2 and the side panel 3 connected thereto will be folded to the inside of the box body 1, and the side panel 3 connected to the support panel 2 will cover the previously folded side panel 3; at this time the support panel 2 is in a folded state, thereby forming a supporting portion 00;

[0086] Then, use tape to seal the interface of the side panel 3, which is used as the bottom of the box, and then put the product through the top of the box body 1, and fold the side panel 3 on the top, and seal it with tape;

[0087] Finally, the retaining frame 4 is put on the box body 1, and the supporting portion 00 will limit the retaining frame 4 to prevent the retaining frame 4 from detaching from the box body 1. At the same time, the retaining frame 4 can effectively improve the structural strength of the box body 1, thereby improving the compression and tearing resistance of the packaging box body, thereby ensuring the application strength; and after the packaging box body is damaged, the retaining frame 4 can be removed and reused, thereby reducing the application cost.

[0088] like Figure 6 and Fig. 9 As shown, a pre-fold 201 is provided in the middle of the support plate 2, and notches 202 are provided on both sides of the pre-fold 201;

[0089] As in the above structure, by setting a pre-fold 201 on the support plate 2, the convenience of folding the support plate 2 can be improved to avoid deviation in folding; the notch 202 is used for opening the packaging box. When the packaging box needs to be opened, the conventional carton needs to tear off the tape, but the tape is firmly adhered and it is inconvenient to tear it off. After setting the notch 202 on the support plate 2, the folded support plate 2 can be torn off as a whole to open the support plate 2 from both sides, and then the side panel 3 and the tape can be torn off together, which improves the convenience of opening and is particularly suitable for automated unpacking occasions.

[0090] like Fig.10 and Fig.11 As shown, the retaining frame 4 includes a frame body 41 and a pressing plate 42, wherein the frame body 41 is sleeved on the box body 1; the pressing plate 42 is arranged on the frame body 41, and the pressing plate 42 presses the side plate 3 on one end of the box body 1 away from the support plate 2;

[0091] As in the above-mentioned structure, by providing a pressure plate 42 in the retaining frame 4, after folding the side panel 3 on the box body 1 and installing the retaining frame 4, the pressure plate 42 can be used to press the side panel 3 on the box body 1 to prevent the side panel 3 from opening, so there is no need to use tape for sealing; and after removing the retaining frame 4, the box body 1 can be opened, which improves the convenience of sealing and unsealing the box.

[0092] like Fig.10 and Fig.11 As shown, the frame 41 includes an angle plate 411, a transverse plate 412, a pull plate 413 and an end plate 414, wherein four angle plates 411 are provided to fit the corners of the box body 1; three transverse plates 412 are provided in parallel between any two adjacent angle plates 411, the ends of the transverse plates 412 are connected to the angle plates 411, and at least one transverse plate 412 protrudes inward and has elasticity; the pull plate 413 is provided on the transverse plate 412 protruding inward; the end plate 414 is provided on any transverse plate 412;

[0093] As in the above structure, the frame body 41 of the retainer 4 is provided with an angle plate 411 and a transverse plate 412. The angle plate 411 can be used to clamp the edge of the retainer 4 and the box body 1, and the transverse plate 412 is used to connect the angle plates 411; one of the transverse plates 412 protrudes toward the inside and has elasticity, so that the retainer 4 can be effectively clamped to the box body 1, so as to further improve the application stability of the retainer 4 and prevent it from being separated from the box body 1;

[0094] The pull plate 413 is used to flatten the protruding horizontal plate 412 so that the retainer 4 can be smoothly clamped on the box body 1; during installation, the pull plate 413 is held and the protruding horizontal plate 412 is flattened, so that the retainer 4 can be put on the box body 1 as a whole, and then the pull plate 413 is released, and the horizontal plate 412 will clamp the box body 1 to ensure stability; and when the retainer 4 needs to be removed, the retainer 4 is pulled up through the end plate 414 to separate the retainer 4 from the box body 1;

[0095] Specifically, when the horizontal plate 412 is pulled outward, it will open the angle plates 411 on both sides, so the horizontal plate 412 should be as short as possible to avoid the problem of too large gaps caused by too much opening of the angle plates 411.

[0096] Specifically, the width of the end plate 414 is R1, and the width of the abutting portion 00 formed after the support plate 2 is folded is R2, and R2 ≥ R1;

[0097] As in the above structure, when the end plate 414 is set, its width should be less than or equal to the width of the folded support plate 2, that is, less than or equal to the width of the abutment portion 00, so that when the packaging boxes are placed side by side, the support plate 2 can be prevented from protruding and being damaged by collision.

[0098] like Figures 10-12 As shown, the transverse plate 412 protruding inward is connected to the angle plate 411 at one end; the angle plate 411 at the other end of the transverse plate 412 is provided with a slot 401, and the slot 401 is used to plug the end of the transverse plate 412;

[0099] As in the above structure, in order to prevent the cross plate 412 from spreading the angle plates 411 on both sides when flattened, only one end of the cross plate 412 is connected to the angle plates 411. After the cross plate 412 is flattened, the end of the cross plate 412 will move into the slot 401, thereby preventing pressure on the angle plates 411 and improving the convenience of flattening the cross plate 412.

[0100] like Fig.10 and Fig.13 As shown, the hanging plate 5 includes a connecting plate 51 and a clamping plate 52, and the box body 1 is provided with a first through hole 101, wherein one end of the connecting plate 51 is connected to the horizontal plate 412; the clamping plate 52 is provided on the connecting plate 51, the clamping plate 52 is clamped in the first through hole 101, and a second through hole 501 is provided in a portion of the connecting plate 51 corresponding to the clamping plate 52;

[0101] As in the above structure, after the holder 4 is put on the box body 1, the clamping plate 52 can be clamped into the first through hole 101 of the box body 1, so as to limit the position of the holder 4 and prevent it from sliding on the box body 1, which increases the installation stability of the holder 4; at the same time, the connecting plate 51 is provided with a second through hole 501, so that it is convenient to hold during transportation, thereby improving the convenience of carrying the packaging box;

[0102] Specifically, the connecting plate 51 can be made of elastic plastic and connected to the retaining frame 4 by hot melt, so that when the retaining frame 4 is assembled on the box body 1, the hanging plate 5 can be pulled outward as a whole to avoid interference between the clamping plate 52 and the box body 1;

[0103] Specifically, the three horizontal plates 412 are arranged in an upper, middle and lower manner, the upper horizontal plate 412 is connected to the hanging plate 5, and the middle horizontal plate 412 is arranged to protrude inwardly.

[0104] In some embodiments, the connecting plate 51 is hinged to the transverse plate 412 by a hinge, so as to facilitate the connection or removal of the clamping plate 52 to the first through hole 101 .

[0105] like Fig.11 As shown, the retainer 4 is made of plastic material, and among the four angle plates 411, two of the angle plates 411 disposed diagonally are provided with thinning areas 402;

[0106] As in the above structure, the thinning area 402 is used to reduce the local structural strength of the retainer 4. In order to ensure environmental protection and achieve recycling, the retainer 4 is made of plastic material, such as plastic, so that the retainer 4 has a low weight and is easy to use; and when the retainer 4 is damaged, the frame body 41 can be quickly opened through the thinning area 402, which is convenient for subsequent crushing of the retainer 4, thereby improving the convenience of recycling;

[0107] Meanwhile, when the retainer 4 is too tightly engaged with the packaging box and cannot be removed normally, the retainer 4 can be destroyed from the thinned area 402; of course, the box body 1 can also be sheared to remove the retainer.

[0108] like Figure 5 As shown, the sticker 6 includes a first portion 61 and a second portion 62, wherein one side of the first portion 61 is bonded to the box body 1, and the other side is used for bonding the tape; the second portion 62 is connected to the side of the first portion 61 facing the support plate 2;

[0109] The above structure is mainly applied to the scenario of using tape to seal the box. After the side panel 3 is sealed with the tape, the end of the tape can be bonded to the sticker 6. In this way, when it is necessary to open the box, the second part 62 of the sticker 6 can be pulled to remove the sticker 6 and the tape as a whole, thereby improving the convenience of unpacking.

[0110] Furthermore, among the three horizontal plates 412, the horizontal plate 412 away from the support plate 2 presses and holds the sticker 6;

[0111] As in the above structure, when the retainer 4 is installed, the horizontal plate 412 will naturally slide down along the tape, and then press the first part 61 of the sticker 6, followed by the second part 62, to prevent the sticker and the tape from opening;

[0112] When the retaining frame 4 is removed, since a horizontal plate 412 protrudes inward, it will scratch the second part 62 of the sticker 6, causing the second part of the sticker 6 to flip up. Although the horizontal plate 412 at the bottom does not protrude, it will also scratch the sticker 6. In this way, when the retaining frame 4 is removed, the tape can be torn off through the scraped sticker 6, which effectively improves the convenience of unpacking.

[0113] The method for using the packaging box of the present invention comprises the following steps:

[0114] S1, using corrugated paper to prepare a box body 1, a support plate 2 and a side plate 3 of an integrated structure;

[0115] S2, unfold the box body 1, and fold the side plate 3 which is provided with one end of the support plate 2 of the box body 1 and is directly connected to the box body 1;

[0116] S3, fold the support plate 2 to form a supporting portion 00, so that the supporting portion 00 protrudes relative to the box body 1, connects the side plate 3 with the support plate 2, presses the other two side plates 3, and seals them with tape, which serves as the bottom surface of the box body 1;

[0117] S4, loading the product into the other end of the box body 1, folding the side panel 3 at that end, and then sealing it with tape;

[0118] S5, sleeve the retaining frame 4 onto the box body 1, and make the retaining frame 4 abut against the abutting portion 00.

[0119] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A packaging box, comprising a corrugated paperboard, a support plate (2) and a retaining frame (4), wherein the corrugated paperboard is used to prepare a box body (1) and a side plate (3), characterized in that: The corrugated paperboard comprises corrugated paper (100), side sealing strips (200), reinforcing strips (300), support rods (400) and face paper (500), wherein: The corrugated paper (100) has a wavy structure; The side seal (200) surrounds the edge of the corrugated paper (100); The reinforcing strip (300) is arranged at a recessed position of the corrugated paper (100), and the reinforcing strip (300) is arranged on both sides of the corrugated paper (100); The support rod (400) is arranged on the reinforcement strip (300) on one side of the corrugated paper (100); The face paper (500) is arranged on both sides of the corrugated paper (100), and the face paper (500) is bonded to the side sealing strip (200) and the support rod (400); The side sealing strip (200), the reinforcing strip (300) and the supporting rod (400) are made of thermosetting material and are arranged as an integrated structure; The box body (1) is in a rectangular cylindrical structure, and the two ends of the box body (1) are connected; two support plates (2) are provided, and the two support plates (2) are provided at the same end of the box body (1) and are arranged on two sides of the box body (1) opposite to each other; one side plate (3) is provided on the side of the support plate (2) away from the box body (1), and on each of the other six sides at both ends of the box body (1); when the packaging box is unfolded, the box surface of the box body (1), the support plates (2) and the side plates (3) are arranged on the same end of the box body (1) and are arranged on the two sides of the box body (1) respectively; ...) and the support plates (2) are arranged on the same end of the box body (1) and are arranged on the two sides of the box body (1) respectively; when the packaging box is unfolded, the box surface of the box body (1) and the support plates (2) are arranged on the two sides of the box body (1) respectively; and the side panels (3) are flat; after the packaging box is folded, the connection between the support plate (2) and the box body (1) is folded, and the middle part of the support plate (2) is folded, so that the support plate (2) is turned out relative to the box body (1) to form a supporting portion (00); the retaining frame (4) is sleeved on the box body (1) and supports the supporting portion (00); a pre-folding mark (201) is provided in the middle part of the support plate (2), and notches (202) are provided on both sides of the pre-folding mark (201).

2. The packaging box according to claim 1, characterized in that: The retaining frame (4) comprises a frame body (41) and a pressing plate (42), wherein: The frame (41) is sleeved on the box (1); The pressing plate (42) is arranged on the frame (41), and the pressing plate (42) presses the side plate (3) on one end of the box body (1) away from the support plate (2).

3. The packaging box according to claim 2, characterized in that: The frame (41) comprises a corner plate (411), a transverse plate (412), a pull plate (413) and an end plate (414), wherein: Four corner plates (411) are provided and are used to fit the corners of the box body (1); Three transverse plates (412) are arranged in parallel between any two adjacent angle plates (411), the ends of the transverse plates (412) are connected to the angle plates (411), and at least one of the transverse plates (412) protrudes inward and is elastic; The pulling plate (413) is arranged on the transverse plate (412) protruding inwardly; The end plate (414) is arranged on any one of the transverse plates (412), the width of the end plate (414) is R1, the width of the abutting portion (00) formed after the support plate (2) is folded is R2, and R2≥R1.

4. The packaging box according to claim 3, characterized in that: One end of the transverse plate (412) protruding inwardly is connected to the angle plate (411); The angle plate (411) at the other end of the transverse plate (412) is provided with a slot (401), and the slot (401) is used to plug the end of the transverse plate (412).

5. The packaging box according to claim 4, characterized in that: It also includes a hanging plate (5), the hanging plate (5) including a connecting plate (51) and a clamping plate (52), the box body (1) is provided with a first through hole (101), wherein: One end of the connecting plate (51) is connected to the transverse plate (412); The clamping plate (52) is arranged on the connecting plate (51), the clamping plate (52) is clamped in the first through hole (101), and a second through hole (501) is provided in a portion of the connecting plate (51) corresponding to the clamping plate (52).

6. The packaging box according to any one of claims 3 to 5, characterized in that: Also included is a sticker (6), the sticker (6) comprising a first portion (61) and a second portion (62), wherein: One side of the first part (61) is bonded to the box body (1), and the other side is used for bonding with an adhesive tape; The second portion (62) is connected to the side of the first portion (61) facing the support plate (2).

7. The packaging box according to claim 6, characterized in that: Among the three transverse plates (412), the transverse plate (412) away from the support plate (2) presses and holds the sticker (6).

8. The packaging box according to any one of claims 3 to 5, characterized in that: The retaining frame (4) is made of plastic material, and among the four angle plates (411), two of the angle plates (411) disposed diagonally are provided with thinning areas (402).

Images