A packing box with reliable sealing

Abstract

The application discloses a reliable sealing packaging box, which is of a rectangular structure. The packaging box is provided with a first foldable page on the length sides of the mouth, a second foldable page on the front width side, and a fourth foldable page on the back width side. The inner side of the first foldable page is nested with a third foldable page. In the sealing state, the first foldable page, the second foldable page, the third foldable page and the fourth foldable page are all horizontally folded inwards, and the second foldable page is overlapped above the first foldable page, the third foldable page is overlapped above the second foldable page, and the fourth foldable page is overlapped above the second foldable page. The technical scheme adopted by the application forms an interlaced overlapping structure with the first foldable page, the second foldable page, the third foldable page and the fourth foldable page, and the structure can be further bonded by glue, so that the strength of the sealing structure is improved, and the sealing structure is very reliable and not easy to be damaged when being pulled.

Description

[Technical Field]

[0001] This invention belongs to the field of packaging technology, and specifically relates to a packaging box. [Background Technology]

[0002] Current packaging box sealing structures, taking rectangular boxes as an example, have small flaps on both sides of the length of the opening and large flaps on both sides of the width. The small flaps are folded under the large flaps, and finally, the large flaps are sealed by a sealing flap. This type of packaging box is usually used for gift boxes and has handles at the sealing point. If the product inside the packaging box is heavy, the sealing structure is not very strong and often breaks. [Summary of the Invention]

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a packaging box with reliable sealing and improve the strength of the sealing structure.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A reliably sealed packaging box has a rectangular structure. The opening of the packaging box has a first flap on both sides along its length, a second flap on the front side along its width, and a fourth flap on the rear side along its width. A third flap is nested inside the first flap. In the sealed state, the first flap, second flap, third flap, and fourth flap are all folded inward horizontally, with the second flap overlapping the first flap, the third flap overlapping the second flap, and the fourth flap overlapping the third flap.

[0006] Preferably, the first fold, the second fold, the third fold, and the fourth fold are glued together.

[0007] Preferably, the free side of the fourth fold has a sealing fold that folds towards the front side of the box when sealed, and the bending side of the second fold has a sealing tongue that extends to the front side of the box at its root, and the sealing tongue cooperates with the sealing fold.

[0008] Preferably, the first fold is an isosceles trapezoidal structure and has an embedded space at the bottom of the isosceles trapezoid for nesting the third fold.

[0009] Preferably, both the embedded space and the third fold are rectangular.

[0010] Preferably, the inner corners of the first fold, second fold, third fold, and fourth fold are rounded.

[0011] The technical solution adopted in this invention improves the strength of the sealing structure because the first fold, second fold, third fold, and fourth fold form an interlaced overlapping structure, and the first fold, second fold, third fold, and fourth fold can be further bonded together with glue. The sealing structure is very reliable and not easily damaged when lifted.

[0012] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. [Attached Image Description]

[0013] The invention will be further described below with reference to the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the packaging box of the present invention after the first fold is folded;

[0015] Figure 2 This is a side view of the packaging box of the present invention after the first fold has been folded.

[0016] Figure 3 This is a top view of the packaging box of the present invention after the first and third folds have been folded.

[0017] Figure 4 This is a schematic diagram of the operation of a box sealing device according to the present invention;

[0018] Figure 5 This is a schematic diagram of the operation of a box sealing device of the present invention after the frame is hidden;

[0019] Figure 6 This is a schematic diagram of the structure of a box sealing device according to the present invention;

[0020] Figure 7 This is a top view of a box sealing device according to the present invention;

[0021] Figure label:

[0022] Packaging box 100, first fold 101, second fold 102, third fold 103, fourth fold 104, sealing edge 1041, sealing tongue 105;

[0023] First folding guide mechanism 1, first turntable 11, first limiting rod 12, first folding limiting rod 13, second folding guide mechanism 2, second folding limiting rod 21, second folding push block 22, push block drive cylinder 23, glue gun 24, third folding guide mechanism 3, second turntable 31, turntable motor 32, synchronous belt 33, frame 4.

Detailed Implementation Methods

[0024] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0025] Those skilled in the art will understand that, without conflict, the features in the following embodiments and implementations can be combined with each other.

[0026] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," "rear," "left," and "right" that indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0030] Reference Figures 1 to 3As shown, a reliably sealed packaging box 100 has a rectangular structure. The opening of the packaging box 100 has a first flap 101 on both sides along its length, a second flap 102 on the front side along its width, and a fourth flap 104 on the rear side along its width. A third flap 103 is nested inside the first flap 101. In the sealed state, the first flap 101, the second flap 102, the third flap 103, and the fourth flap 104 are all folded inward horizontally. The second flap 102 overlaps the first flap 101, the third flap 103 overlaps the second flap 102, and the fourth flap 104 overlaps the third flap 103.

[0031] Because the first, second, third, and fourth folds form an interlocking structure, and these folds can be further bonded together with adhesive, the sealing structure is highly reliable and not easily damaged when lifted.

[0032] Referring to the prior art, the free side of the fourth fold is provided with a sealing fold 1041 that folds towards the front side of the box in the sealed state, and the bending side of the second fold is provided with a sealing tongue 105 that extends to the front side of the box at its root. The sealing tongue 105 cooperates with the sealing fold 1041 to finally complete the sealing.

[0033] In this embodiment, the first flap 101 is an isosceles trapezoid with an embedded space at the bottom for nesting the third flap 103. Both the embedded space and the third flap are rectangular. One side of the third flap 103 is connected to the packaging box 100, while the other three sides are not connected to the edge of the embedded space. Therefore, the third flap can be folded relative to the first flap. Furthermore, the inner corners of the first flap, second flap, third flap, and fourth flap are rounded.

[0034] For packaging boxes with the above structure, in order to achieve the staggered overlapping of the first, second, third, and fourth folds during the sealing process, such as... Figures 4 to 7 As shown, a sealing device is designed, including a conveying component with a horizontal conveying path, along which the packaging box 100 is conveyed. The sealing device also includes a first folding guide mechanism 1, a second folding guide mechanism 2, and a third folding guide mechanism 3, which are arranged sequentially on the frame 4 and along the horizontal conveying path; during the conveying process, the packaging box is stacked with the first folding guide mechanism 1, the second folding guide mechanism 2, and the third folding guide mechanism 3 in sequence to complete the stacking of the first fold 101, the second fold 102, and the third fold 103.

[0035] The first folding and guiding mechanism 1 includes two first turntables 11 arranged side by side. The first turntables 11 are located above the horizontal conveying path. The first turntables 11 are arranged vertically and their axial direction is perpendicular to the direction of the horizontal conveying path. The edges of the first turntables 11 are circular and an opening is provided on the first turntables 11.

[0036] The second folding guide mechanism 2 includes a second folding pusher 22 located on the side of the horizontal conveying path for pushing the second folding page to fold inward. The second folding pusher 22 is driven by a pusher driver.

[0037] The third folding guide mechanism 3 includes a second turntable 31, which is located above the horizontal conveying path. The second turntable 31 is vertically arranged and its axis is perpendicular to the direction of the horizontal conveying path. The edge of the second turntable 31 is a circular outline, and an opening is provided on the second turntable 31.

[0038] The structure and working principle of the first turntable 11 and the second turntable 31 mentioned above can be referred to the turntable structure in Chinese invention patent application publication number CN104108481A.

[0039] like Figure 5 As shown, the first folding guide mechanism 1 also includes two first limiting rods 12 arranged side by side and extending along the horizontal conveying path. The two first limiting rods 12 are located on the inner side of the second fold 102 and the fourth fold 104, respectively, to limit the inward folding of the second fold 102 and the fourth fold 104, and to avoid interference with the first turntable 11 folding the first fold 101.

[0040] Furthermore, the first folding guide mechanism 1 also includes a first folding limiting rod 13 extending from the rear side of the first folding guide mechanism to the front side of the second bending guide mechanism, which is used to restrict the first folding from flipping up, so that the second folding 102 can be folded and stacked on the first folding 101.

[0041] In one implementation, the pusher driver is a pusher drive cylinder 23. The movement path of the second folding pusher 22 is inclined to the horizontal plane. During the downward oblique movement of the second folding pusher 22, it pushes the second fold 102 to flip inward and overlap the first fold 101. The bottom of the head end of the second folding pusher 22 is provided with an arc-shaped surface that interacts with the second fold 102. It is understood that an electric cylinder or the like can also be used to replace the pusher drive cylinder 23.

[0042] Furthermore, the second folding guide mechanism 2 also includes a glue gun 24 for spraying glue onto the surface of the second fold, so that the third fold is glued and fixed while overlapping the second fold 102. It is understood that the glue gun 24 can also spray glue onto the surface of the first fold, so that the second fold is glued and fixed to the first fold when folded. Of course, other glue guns can also be provided, for example, a glue gun can be provided behind the third folding guide mechanism, so that glue can be sprayed onto the surface of the third fold, facilitating the glued and fixed fourth fold.

[0043] To prevent the second fold 102 from folding outwards before the second fold pusher 22 pushes the second fold inwards, the second fold guiding mechanism 2 further includes a second fold limiting rod 21 that restricts the second fold inwards. The second fold limiting rod 21 is located above the second fold pusher 22. One end of the second fold limiting rod 21 is connected to the first limiting rod 12, and the connected end is inclined outwards to guide the second fold 102 into the inside of the second fold limiting rod 21.

[0044] like Figure 4 As shown, in this embodiment, the first turntable 11 and the second turntable 31 are driven by the same turntable motor 32. The first turntable 11 is mounted on a first turntable shaft, and the second turntable 31 is mounted on a second turntable shaft. The turntable motor 32 drives either the first or second turntable shaft to rotate, and the first and second turntable shafts are connected by a synchronous belt 33. Therefore, rotation of either the first or second turntable shaft drives the other turntable shaft to rotate. Alternatively, the first turntable 11 and the second turntable 31 can each be driven by a separate turntable motor 32. The advantage of having the first turntable 11 and the second turntable 31 driven by the same turntable motor 32 is that it ensures coordinated operation of the first and second turntables, as they work simultaneously.

[0045] Furthermore, the specific structure of the conveying component can refer to existing technologies. For example, the conveying component includes a drive assembly and a pusher plate. The pusher plate is mounted on the drive assembly, and the drive assembly drives the pusher plate through a horizontal conveying path. The drive assembly includes a chain and a sprocket. The chain is mounted on the sprocket and unfolds to form a ring structure with arc-shaped ends and a straight middle section, thus creating a ring-shaped motion path, one section of which is a horizontal conveying path. The pusher plate is fixed to the chain, specifically, it can be fixed to the side plate of the chain.

[0046] The above description is merely a specific embodiment of the invention, but the scope of protection of the invention is not limited thereto. Those skilled in the art should understand that the invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the invention will be included within the scope of the claims.

Claims

1. A reliably sealed packaging box, having a rectangular structure, characterized in that, The packaging box has a first fold on each of its two sides along its length, a second fold on its front side along its width, and a fourth fold on its rear side along its width. A third fold is nested inside the first fold. When the box is sealed, all four folds fold inwards horizontally, with the second fold overlapping the first fold, the third fold overlapping the second fold, and the fourth fold overlapping the third fold. The first, second, third, and fourth folds are glued together. The free side of the fourth fold has a sealing fold that folds towards the front of the box when sealed. The folded side of the first fold has a sealing tongue extending from its root to the front side of the box. The sealing tongue cooperates with the sealing edge. The first fold is an isosceles trapezoid with an embedded space at the bottom of the trapezoid for a nested third fold. The box is sealed by a sealing device, which includes a conveying component with a horizontal conveying path. The conveying component includes a drive assembly and a push plate. The push plate is mounted on the drive assembly and drives the push plate through the horizontal conveying path. The sealing device also includes a first folding guide mechanism, a second folding guide mechanism, and a third folding guide mechanism arranged sequentially along the horizontal conveying path. The first folding and guiding mechanism includes two first turntables arranged side by side. The first turntables are located above the horizontal conveying path. The first turntables are arranged vertically and their axial direction is perpendicular to the direction of the horizontal conveying path. The edges of the first turntables are circular and an opening is provided on the first turntable. The second folding guide mechanism includes a second folding push block located on the side of the horizontal conveying path for pushing the second folding page to fold inward, and the second folding push block is driven by a push block driver; The third folding guide mechanism includes a second turntable located above the horizontal conveying path. The second turntable is vertically arranged and its axis is perpendicular to the direction of the horizontal conveying path. The edge of the second turntable has a circular outline and an opening. The first folding guide mechanism also includes two first limiting rods arranged side by side and extending along the horizontal conveying path. The two first limiting rods are located on the inner sides of the second fold and the fourth fold, respectively, to limit the inward folding of the second fold and the fourth fold. The first folding guide mechanism also includes a first folding limiting rod extending from the rear side of the first folding guide mechanism to the front side of the second bending guide mechanism, to limit the upward folding of the first fold. The second folding guide mechanism also includes a glue gun for spraying glue onto the surface of the first fold and / or the second fold. The second folding guide mechanism also includes a second folding limiting rod that limits the second fold to the inner side, and the second folding limiting rod is located above the second folding push block.

2. The packaging box with reliable sealing according to claim 1, characterized in that, Both the embedded space and the third fold are rectangular.

3. The packaging box with reliable sealing according to claim 1, characterized in that, The inner corners of the first, second, third, and fourth folds are rounded.

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