Cover closing equipment for packaging box
By designing automated packaging box cover closure equipment, the conveying mechanism and multiple bending mechanisms work together, the inefficiency and quality problems caused by manual bending are solved, and efficient and stable packaging box cover closure is achieved.
Patent Information
- Application Number
- CN202422104126.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-29
AI Technical Summary
In the prior art, the closing cover of the packaging box mainly relies on manual bending, resulting in low production efficiency and difficult to ensure product quality.
A packaging box closure device is designed, including a conveying mechanism, a first-side cover bending mechanism, a tongue-in-sticking mechanism and a second-side cover bending mechanism. Through the coordinated work of these mechanisms, the bend and closure of the face cover and tongue-in-sticking cover are automatically completed.
The automatic combinatorial cover of the packaging box is realized, which improves production efficiency and ensures consistency in product quality.
Smart Images
Figure CN223046010U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of automation, in particular to a device for closing the lid of a packaging box. Background Art
[0002] The packaging box for packaging products is usually made by folding plate-shaped raw materials. Before closing the lid, the packaging box includes a box body, a lid connected to the box body, and a tongue connected to the lid. The lid needs to be bent to close the lid, and the tongue needs to be bent before the lid is closed so that the tongue can be inserted into the box body when the lid is closed. At present, the lid of the packaging box is usually closed by manual bending by workers, with low production efficiency and unable to guarantee product quality. Content of the Utility Model
[0003] The purpose of the utility model is to provide a device for closing the lid of a packaging box, which can automatically close the lid of the packaging box in a production line manner, improving production efficiency and better guaranteeing production quality.
[0004] The utility model provides a device for closing the lid of a packaging box. The packaging box includes a box body, a lid connected to the box body through a first fold line, and a tongue connected to the lid through a second fold line. The device for closing the lid of the packaging box includes a conveying mechanism, a first lid bending mechanism, a tongue bending mechanism, and a second lid bending mechanism. The box body can be placed on the conveying mechanism, and the conveying mechanism can drive the packaging box to move along a first direction. In the first direction, the position of the outer contour of the first lid bending mechanism gradually changes along a second direction, so as to be able to push the lid moving along the first direction to rotate around the first fold line parallel to the first direction, from an initial lid position to an intermediate lid position. The tongue bending mechanism is arranged behind the first lid bending mechanism in the first direction. In the first direction, the position of the outer contour of the tongue bending mechanism gradually changes along the second direction and a third direction, so that after the lid rotates to the intermediate lid position, the tongue bending mechanism can push the tongue moving along the first direction to rotate around the second fold line parallel to the first direction, from an initial tongue position to a position to be inserted. The third direction is perpendicular to the first direction and the second direction. In the first direction, the position of the outer contour of the second lid bending mechanism gradually changes along the third direction, so that after the tongue rotates to the position to be inserted, the second lid bending mechanism can push the lid moving along the first direction to rotate from the intermediate lid position to close the lid with the box body, and at the same time the tongue is inserted into the box body.
[0005] The device for closing the lid of the packaging box provided by the utility model conveys the packaging box through the conveying mechanism, and cooperates with the first lid bending mechanism, the tongue bending mechanism, and the second lid bending mechanism to complete the bending of the lid and the tongue during the conveying process. The device for closing the lid automatically closes the lid of the packaging box in a production line manner, improving production efficiency and better guaranteeing production quality.
[0006] In another exemplary embodiment of the lid closing device for the packaging box, the first lid folding mechanism includes a cylindrical folding portion. The first lid folding mechanism pushes the lid to rotate around the first folding line through the folding portion. The above structure is simple and convenient for processing and manufacturing.
[0007] In still another exemplary embodiment of the lid closing device for the packaging box, the tongue folding mechanism includes a positioning member, several first guide posts, several second guide posts, and a third guide post. The positioning member is disposed between the first lid folding mechanism and the second lid folding mechanism in the first direction. The positioning member can block the lid from continuing to rotate after the lid rotates to the middle position of the lid. The axes of the first guide posts are parallel to the second direction. The several first guide posts are arranged along the first direction, and the several first guide posts can continue to abut against the lid after the lid rotates to the middle position of the lid, so that the lid abuts against the positioning member. The axes of the second guide posts are parallel to the second direction. The several second guide posts are arranged along the first direction. In the first direction, the radii of the several second guide posts gradually change, or the positions of the axes of the several second guide posts gradually change along the third direction, so as to cooperate with the positioning member to push the tongue moving along the first direction to rotate from the initial position of the tongue to a first intermediate position of the tongue. The first intermediate position of the tongue is located between the initial position of the tongue and the position to be inserted. The third guide post is disposed behind the several second guide posts in the first direction. The axis of each third guide post is parallel to the third direction. After the tongue rotates to the first intermediate position of the tongue, the third guide post can push the tongue moving along the first direction to rotate from the first intermediate position of the tongue to a second intermediate position of the tongue. The second intermediate position of the tongue is located between the first intermediate position of the tongue and the position to be inserted. The fourth guide post is disposed behind the third guide post in the first direction. The axis of the fourth guide post is parallel to the third direction. After the tongue rotates to the second intermediate position of the tongue, the fourth guide post can push the tongue moving along the first direction to rotate from the second intermediate position of the tongue to the position to be inserted.
[0008] In still another exemplary embodiment of the lid closing device for the packaging box, at least one of the second guide posts arranged last in the first direction is frustum-shaped. Thereby, a smooth transition effect is achieved.
[0009] In still another exemplary embodiment of the lid closing device for the packaging box, the first guide post is a roller capable of rotating around its axis. The tongue folding mechanism further includes several fifth guide posts. The axes of the fifth guide posts are parallel to the second direction. The several fifth guide posts are arranged along the first direction, and each fifth guide post is inserted between two adjacent first guide posts to cooperate with the several first guide posts to abut against the lid. Thereby, the smoothness of the packaging box during transportation is improved, and at the same time, the stability of the packaging box during transportation is ensured.
[0010] In yet another illustrative embodiment of the lid closing device for the packaging box, the second guide post, the third guide post, and / or the fourth guide post are rollers capable of rotating about their axes. Thereby, the smoothness of the conveyance of the packaging box is improved.
[0011] In yet another illustrative embodiment of the lid closing device for the packaging box, the second lid folding mechanism includes a set of sixth guide posts. The axes of the sixth guide posts are parallel to the second direction, and the set of sixth guide posts are arranged along the first direction. In the first direction, the radii of the set of sixth guide posts gradually change, or the positions of the axes of the set of sixth guide posts gradually change along the third direction, so as to push the lid moving along the first direction to rotate from the middle position of the lid to close the lid with the box body.
[0012] In yet another illustrative embodiment of the lid closing device for the packaging box, the sixth guide posts are rollers capable of rotating about their axes. The second lid folding mechanism further includes several seventh guide posts. The axes of the seventh guide posts are parallel to the second direction, and the several seventh guide posts are arranged along the first direction, and each seventh guide post is inserted between two adjacent sixth guide posts to cooperate with the several sixth guide posts to push the lid to rotate. Thereby, the smoothness of the conveyance of the packaging box is improved, and at the same time, the stability of the conveyance of the packaging box is ensured.
[0013] In yet another illustrative embodiment of the lid closing device for the packaging box, the second lid folding mechanism includes two sets of sixth guide posts, and the two sets of sixth guide posts are arranged oppositely along the second direction.
[0014] In yet another illustrative embodiment of the lid closing device for the packaging box, the lid closing device for the packaging box further includes several flattening rollers. The axes of the flattening rollers are parallel to the second direction, and the several flattening rollers are arranged along the first direction. After the lid rotates to close the lid with the box body, the several flattening rollers can rollingly abut against the lid moving along the first direction, and the several flattening rollers abut against the part of the lid close to the first fold line.
[0015] In yet another illustrative embodiment of the lid closing device for the packaging box, the conveying mechanism includes two tracks and a chain transmission device. The two tracks extend parallel to each other along the first direction. The chain transmission device includes a chain, a driving gear, a driven gear, and several driving members. The driving gear and the driven gear are used to support the chain connected end to end, and the driving gear is used to connect the motor to drive the chain to rotate. A part of the chain extends along the first direction, and the several driving members are arranged at intervals on the chain and can push the packaging box to move on the two tracks. Description of the Drawings
[0016] The following drawings only schematically illustrate and explain the present invention and do not limit the scope of the present invention.
[0017] Figure 1It is a schematic structural diagram for illustrating a schematic implementation of a lid-closing device for a packaging box.
[0018] Figure 2 It is a schematic partial structural diagram for illustrating a lid-closing device for a packaging box.
[0019] Figure 3 It is a schematic partial structural diagram for illustrating a lid-closing device for a packaging box.
[0020] Figure 4 It is a schematic partial structural diagram for illustrating a lid-closing device for a packaging box.
[0021] Figure 5 It is a partial cross-sectional view for illustrating a lid-closing device for a packaging box.
[0022] Figure 6 It is a partial cross-sectional view for illustrating a lid-closing device for a packaging box.
[0023] Figure 7 It is a partial cross-sectional view for illustrating a lid-closing device for a packaging box.
[0024] Figure 8 It is a partial cross-sectional view for illustrating a lid-closing device for a packaging box.
[0025] Label Explanation
[0026] 10 Conveyor mechanism
[0027] 11 Track
[0028] 12 Chain
[0029] 13 Driving gear
[0030] 14 Driven gear
[0031] 15 Driving part
[0032] 20 First lid bending mechanism
[0033] 22 Bending part
[0034] 30 Tongue bending mechanism
[0035] 31 Positioning part
[0036] 32 First guide post
[0037] 33 Second guide post
[0038] 34 Third guide post
[0039] 35 Fourth guide post
[0040] 36 Fifth guide post
[0041] 40 Second cover folding mechanism
[0042] 42 Sixth guide post
[0043] 44 Seventh guide post
[0044] 50 Flattening roller
[0045] 61 Box body
[0046] 62 Cover
[0047] 63 Tongue
[0048] L1 First fold line
[0049] L2 Second fold line
[0050] X First direction
[0051] Y Second direction
[0052] Z Third direction Detailed implementation manners
[0053] For a clearer understanding of the technical features, objectives, and effects of the utility model, the specific implementation manners of the utility model are now described with reference to the accompanying drawings. In the drawings, the same reference numerals denote components having the same or similar structures but the same functions.
[0054] In this document, "schematic" means "serving as an example, instance, or illustration", and any illustration or implementation manner described as "schematic" in this document should not be construed as a more preferred or more advantageous technical solution.
[0055] For the sake of simplicity of the drawings, only the parts related to the utility model are schematically shown in each drawing, and they do not represent the actual structure of the product.
[0056] In this document, "first", "second", etc. do not indicate their importance or order, etc., but are only used to indicate the difference between each other for the convenience of document description.
[0057] Figure 1 It is a schematic structural diagram for illustrating a schematic implementation manner of the cover closing device for a packaging box. Referring to Figure 1 , the packaging box includes a box body 61, a cover 62 connected to the box body 61 through a first fold line L1, and a tongue 63 connected to the cover 62 through a second fold line L2. The cover closing device for the packaging box includes a conveying mechanism 10, a first cover folding mechanism 20, a tongue folding mechanism 30, and a second cover folding mechanism 40. The box body 61 can be placed on the conveying mechanism 10, and the conveying mechanism 10 can drive the packaging box to move along a first direction X.
[0058] Figure 2 This is a schematic partial view of the lid-closing device for a packaging box. Refer to Figure 2 , in the first direction X, the position of the outer contour of the first lid folding mechanism 20 gradually changes along the second direction Y, so as to be able to push the lid 62 moving along the first direction X to rotate around the first folding line L1 parallel to the first direction X, from the initial position of a lid as shown in Figure 1 to the intermediate position of a lid as shown in Figure 2 .
[0059] Figures 3 to 7 This is a schematic partial view of the lid-closing device for a packaging box. Refer to Figures 3 to 7 , the tongue folding mechanism 30 is arranged behind the first lid folding mechanism 20 in the first direction X. In the first direction X, the position of the outer contour of the tongue folding mechanism 30 gradually changes along the second direction Y and the third direction Z, so that after the lid 62 rotates to the intermediate position of the lid, the tongue folding mechanism 30 can push the tongue 63 moving along the first direction X to rotate around the second folding line L2 parallel to the first direction X, from the initial position of a tongue as shown in Figure 3 to a position to be inserted as shown in Figure 7 .
[0060] Figure 8 This is a schematic partial cross-sectional view of the lid-closing device for a packaging box. Refer to Figure 7 and Figure 8 , in the first direction X, the position of the outer contour of the first lid folding mechanism 20 gradually changes along the third direction Z, so that after the tongue 63 rotates to the position to be inserted, the second lid folding mechanism 40 can push the lid 62 moving along the first direction X to rotate from the intermediate position of the lid to close the lid with the box body 61, and at the same time the tongue 63 is inserted into the box body 61.
[0061] The lid-closing device for the packaging box provided by the present utility model conveys the packaging box through the conveying mechanism 10, and cooperates with the first lid folding mechanism 20, the tongue folding mechanism 30 and the second lid folding mechanism 40 to complete the folding of the lid and the tongue during the conveying process. The lid-closing device automatically realizes the lid closing of the packaging box in a pipeline manner, improves the production efficiency and can better ensure the production quality.
[0062] In the illustrative embodiment, refer to Figure 2 , the conveying mechanism 10 includes two tracks 11 and a chain transmission device. The two tracks 11 extend parallel to each other in the first direction X. The chain transmission device includes a chain 12, a driving gear 13, two driven gears 14 and several driving members 15( Figure 2(only one of them is marked), the driving gear 13 and the driven gear 14 are used to support the chain 12 connected end to end, and the driving gear 13 is used to connect the motor to drive the chain 12 to rotate. A part of the chain 12 extends along the first direction X, and several driving members 15 are arranged on the chain 12 at intervals and can push the packaging box to move on the two tracks 11 between the two tracks 11.
[0063] In the schematic embodiment, referring to Figure 2 , the first cover folding mechanism 20 includes a cylindrical folding portion 22. The folding portion 22 is inclined and in the first direction X, the folding portion 22 gradually extends into the conveying mechanism 10 and gradually approaches the box body 61 along a third direction Z perpendicular to the first direction X and the second direction Y. The first cover folding mechanism 20 pushes the cover 62 to rotate around the first folding line L1 through the folding portion 22. The above structure of the first cover folding mechanism 20 is simple and convenient for processing and manufacturing, but it is not limited to this. In other schematic embodiments, the first cover folding mechanism 20 can also be other structures that can achieve the above functions.
[0064] In the schematic embodiment, referring to Figure 3 and Figure 4 , the tongue folding mechanism 30 includes a positioning member 31, four first guide posts 32 ( Figure 3 only two of them are marked in Figure 4 ), five second guide posts 33 ( Figure 4 only two of them are marked in
[0065] Referring to Figure 3 and Figure 5 , the axes of the first guide posts 32 are parallel to the second direction Y. The four first guide posts 32 are arranged along the first direction X, and the four first guide posts 32 can continue to abut against the cover 62 after the cover 62 rotates to the middle position of the cover, so that the cover 62 abuts against the positioning member 31. In the schematic embodiment, the first guide post 32 is a roller that can rotate around its axis. Referring to Figure 3 and Figure 6 , the tongue folding mechanism 30 further includes three fifth guide posts 36 ( Figure 3(only one of them is marked), the axis of each fifth guiding post 36 is parallel to the second direction Y, the three fifth guiding posts 36 are arranged along the first direction X, and each fifth guiding post 36 is inserted between two adjacent first guiding posts 32 to cooperate with the four first guiding posts 32 to abut against the face cover 62. Thereby, the smoothness of the packaging box during transportation is improved, and at the same time, the stability of the packaging box during transportation is ensured. The number and arrangement of the first guiding posts 32 and the fifth guiding posts 36 can be set according to the actual size of the packaging box, and are not limited to Figure 3 shown in
[0066] Referring to Figure 4 and Figure 5 , the axis of each second guiding post 33 is parallel to the second direction Y. Five second guiding posts 33 are arranged along the first direction X. In the first direction X, the positions of the axes of the five second guiding posts 33 gradually change along the third direction Z to cooperate with the positioning member 31 to push the tongue 63 moving along the first direction X to rotate from the initial position of the tongue to a first intermediate position of the tongue. The first intermediate position of the tongue is located between the initial position of the tongue and the position to be inserted. In other schematic embodiments, it can also be set that the axes of several second guiding posts 33 are flush and the radii of several second guiding posts 33 gradually increase, and the tongue 63 can also be pushed to rotate.
[0067] Referring to Figure 4 and Figure 6 , the third guiding post 34 is arranged after several second guiding posts 33 in the first direction X, and the axis of each third guiding post 34 is parallel to the third direction Z. After the tongue 63 rotates to the first intermediate position of the tongue, the third guiding post 34 can push the tongue 63 moving along the first direction X to rotate from the first intermediate position of the tongue to a second intermediate position of the tongue as shown in Figure 6 , and the second intermediate position of the tongue is located between the first intermediate position of the tongue and the position to be inserted.
[0068] Referring to Figure 4 and Figure 7 , the fourth guiding post 35 is arranged after the third guiding post 34 in the first direction X, and the axis of the fourth guiding post 35 is parallel to the third direction Z. After the tongue 63 rotates to the second intermediate position of the tongue, the fourth guiding post 35 can push the tongue 63 moving along the first direction X to rotate from the second intermediate position of the tongue to the position to be inserted.
[0069] The number and arrangement of the third guiding post 34 and the fourth guiding post 35 can be set according to the actual size of the packaging box, and are not limited to Figure 4 shown in
[0070] In a schematic embodiment, referring to Figure 4, the two second guiding columns 33 arranged last along the first direction X are frustum-shaped. By means of the inclined surface of the frustum, a smooth transition effect is achieved between the second guiding column 33 with its axis parallel to the second direction Y and the third guiding column 34 with its axis parallel to the third direction Z.
[0071] In the schematic embodiment, the second guiding column 33 is a roller capable of rotating around its axis, thereby improving the smoothness during the conveyance of the packaging box. However, it is not limited thereto. In other schematic embodiments, the third guiding column 34 and the fourth guiding column 35 can also be rollers capable of rotating around their axes, and the second guiding column 33 can also be configured as a non-rotatable structure.
[0072] In the schematic embodiment, referring to Figure 4 , Figure 7 and Figure 8 , the second lid folding mechanism 40 includes two groups of sixth guiding columns 42 ( Figure 4 only four of them are labeled therein). The axis of each sixth guiding column 42 is parallel to the second direction Y, and the two groups of sixth guiding columns 42 are arranged along the first direction X. In the first direction X, the positions of the axes of the two groups of sixth guiding columns 42 gradually change along the third direction Z, and the two groups of sixth guiding columns 42 are arranged oppositely along the second direction Y to push the lid 62 moving along the first direction X to rotate from the middle position of the lid to the position of closing the box body 61. In other schematic embodiments, it can also be configured such that the axes of the two groups of sixth guiding columns 42 are flush and the radii of the two groups of sixth guiding columns 42 gradually increase, and the rotation of the lid 62 can also be achieved.
[0073] In the schematic embodiment, referring to Figure 1 and Figure 8 , the lid closing device of the packaging box further includes five flattening rollers 50 ( Figure 1 only two of them are labeled therein), the axis of each flattening roller 50 is parallel to the second direction Y, the five flattening rollers 50 are arranged along the first direction X, after the lid 62 rotates to close the box body 61, the five flattening rollers 50 can rollingly abut against the lid 62 moving along the first direction X, and the five flattening rollers 50 abut against the part of the lid 62 close to the first fold line L1. The number and arrangement mode of the flattening rollers 50 can be set according to the actual size of the packaging box, and are not limited to what is shown in Figure 1 .
[0074] It should be understood that although this specification is described according to each embodiment, not every embodiment only contains an independent technical solution. This narrative mode of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0075] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present utility model, and they are not intended to limit the protection scope of the present utility model. Any equivalent implementation schemes or changes made without departing from the technical spirit of the present utility model, such as the combination, division or repetition of features, shall be included within the protection scope of the present utility model.
Claims
1. A lid closing device for a packaging box, the packaging box comprising a box body, a cover connected to the box body via a first fold line (L1), and an insert tongue connected to the cover via a second fold line (L2), characterized in that: The lid closing device of the packaging box comprises: A conveying mechanism (10), the box body can be placed on the conveying mechanism (10), and the conveying mechanism (10) can drive the packaging box to move along a first direction (X); A first cover bending mechanism (20), wherein in the first direction (X), the position of the outer contour of the first cover bending mechanism (20) gradually changes along a second direction (Y) so as to be able to push the cover moving along the first direction (X) to rotate around a first folding line (L1) parallel to the first direction (X) from an initial position of the cover to an intermediate position of the cover; an insert tongue bending mechanism (30), which is arranged behind the first cover bending mechanism (20) in the first direction (X); in the first direction (X), the position of the outer contour of the insert tongue bending mechanism (30) gradually changes along the second direction (Y) and a third direction (Z), so that after the cover rotates to the middle position of the cover, the insert tongue bending mechanism (30) can push the insert tongue moving along the first direction (X) to rotate around a second folding line (L2) parallel to the first direction (X), and rotate from an insert tongue initial position to a waiting insertion position, and the third direction (Z) is perpendicular to the first direction (X) and the second direction (Y); and A second cover bending mechanism (40), in the first direction (X), the position of the outer contour of the second cover bending mechanism (40) gradually changes along the third direction (Z), so that after the insertion tongue rotates to the to-be-inserted position, the second cover bending mechanism (40) can push the cover moving along the first direction (X) to rotate from the middle position of the cover to close the cover with the box body, and at the same time the insertion tongue is inserted into the box body.
2. The lid closing device for a packaging box according to claim 1, characterized in that: The first cover bending mechanism (20) comprises a cylindrical bending portion (22), and the first cover bending mechanism (20) pushes the cover to rotate around a first folding line (L1) via the bending portion (22).
3. The lid closing device for a packaging box according to claim 1, characterized in that: The tongue bending mechanism (30) comprises: a positioning member (31) which is arranged between the first cover bending mechanism (20) and the second cover bending mechanism (40) in the first direction (X), and the positioning member (31) can prevent the cover from further rotating after the cover rotates to the middle position of the cover; A plurality of first guide posts (32), the axis of each of the first guide posts (32) being parallel to the second direction (Y), the plurality of first guide posts (32) being arranged along the first direction (X), and the plurality of first guide posts (32) being able to continue to abut against the surface cover after the surface cover is rotated to the middle position of the surface cover, so that the surface cover abuts against the positioning member (31); a plurality of second guide posts (33), the axis of each of the second guide posts (33) being parallel to the second direction (Y), the plurality of second guide posts (33) being arranged along the first direction (X), the radius of the plurality of second guide posts (33) gradually changing in the first direction (X), or the position of the axis of the plurality of second guide posts (33) gradually changing along the third direction (Z), so as to cooperate with the positioning member (31) to push the plug tongue moving along the first direction (X) to rotate from the initial position of the plug tongue to a first middle position of the plug tongue, the first middle position of the plug tongue being located between the initial position of the plug tongue and the position to be inserted; a third guide post (34), which is arranged behind the plurality of second guide posts (33) in the first direction (X), the axis of each third guide post (34) being parallel to the third direction (Z), and after the plug tongue rotates to the first intermediate position of the plug tongue, the third guide post (34) can push the plug tongue moving along the first direction (X) to rotate from the first intermediate position of the plug tongue to a second intermediate position of the plug tongue, the second intermediate position of the plug tongue being located between the first intermediate position of the plug tongue and the position to be inserted; and A fourth guide post (35) is arranged behind the third guide post (34) in the first direction (X), the axis of the fourth guide post (35) is parallel to the third direction (Z), and after the plug tongue rotates to the second middle position of the plug tongue, the fourth guide post (35) can push the plug tongue moving along the first direction (X) to rotate from the second middle position of the plug tongue to the waiting insertion position.
4. The lid closing device for a packaging box as claimed in claim 3, characterized in that: At least one of the second guide pillars (33) arranged last along the first direction (X) is in the shape of a truncated cone.
5. The lid closing device for a packaging box as claimed in claim 3, characterized in that: The first guide column (32) is a roller that can rotate around its axis; the tongue bending mechanism (30) further comprises a plurality of fifth guide columns (36), the axis of each of the fifth guide columns (36) is parallel to the second direction (Y), the plurality of fifth guide columns (36) are arranged along the first direction (X), and each of the fifth guide columns (36) is inserted between two adjacent first guide columns (32) to cooperate with the plurality of first guide columns (32) to abut against the surface cover.
6. The lid closing device for a packaging box as claimed in claim 3, characterized in that: The second guide column (33), the third guide column (34) and / or the fourth guide column (35) are rollers that can rotate around their axes.
7. The lid closing device for a packaging box according to claim 1, characterized in that: The second cover bending mechanism (40) comprises a group of sixth guide posts (42), the axis of each of the sixth guide posts (42) is parallel to the second direction (Y), and a group of the sixth guide posts (42) is arranged along the first direction (X). In the first direction (X), the radius of a group of the sixth guide posts (42) gradually changes, or the position of the axis of a group of the sixth guide posts (42) gradually changes along the third direction (Z), so as to push the cover moving along the first direction (X) to rotate from the middle position of the cover to close the cover with the box body.
8. The lid closing device for a packaging box according to claim 7, characterized in that: The sixth guide column (42) is a roller that can rotate around its axis; the second cover bending mechanism (40) also includes a plurality of seventh guide columns (44), the axis of each of the seventh guide columns (44) is parallel to the second direction (Y), the plurality of the seventh guide columns (44) are arranged along the first direction (X), and each of the seventh guide columns (44) is inserted between two adjacent sixth guide columns (42) to cooperate with the plurality of the sixth guide columns (42) to push the cover to rotate.
9. The lid closing device for a packaging box according to claim 8, characterized in that: The second cover bending mechanism (40) comprises two groups of sixth guide posts (42), and the two groups of sixth guide posts (42) are arranged opposite to each other along the second direction (Y).
10. The lid closing device for a packaging box according to claim 1, characterized in that: The closing device of the packaging box also includes a plurality of flattening rollers (50), the axis of each of the flattening rollers (50) is parallel to the second direction (Y), and the plurality of flattening rollers (50) are arranged along the first direction (X). After the cover is rotated to close with the box body, the plurality of flattening rollers (50) can roll against the cover moving along the first direction (X), and the plurality of flattening rollers (50) abut against a portion of the cover close to the first fold line (L1).
11. The lid closing device for a packaging box according to claim 1, characterized in that: The conveying mechanism (10) comprises: Two tracks (11), the two tracks (11) extending in parallel along the first direction (X); A chain transmission device comprises a chain (12), a driving gear (13), a driven gear (14) and a plurality of driving members (15); the driving gear (13) and the driven gear (14) are used to support the chain (12) connected end to end, and the driving gear (13) is used to connect to a motor to drive the chain (12) to rotate; a part of the chain (12) extends along the first direction (X); a plurality of driving members (15) are arranged on the chain (12) at intervals and can push the packaging box to move on the two tracks (11).