Blocking and protecting structure for carton line boxing

Abstract

The utility model discloses a blocking and protecting structure for carton line packing, which belongs to the technical field of carton packing line packing and is arranged on a conveying mechanism, a support and a plurality of rollers are arranged on the conveying mechanism, the blocking and protecting structure further comprises a supporting plate and a telescopic part which are both arranged on the support, and the telescopic end of the telescopic part movably penetrates through the supporting plate and is provided with a lifting plate. The barrier plate is arranged on the lifting plate; the transmission mechanism and the linkage mechanism are arranged on the supporting plate and the lifting plate respectively, and the linkage mechanism is connected with a protection roller; according to the scheme, through cooperation of the transmission mechanism and the linkage mechanism, the protection roller can move leftwards while moving upwards, the protection roller can play a role in blocking and buffering a normally-moving carton, in other words, the carton can be slowly and stably stopped, resistance borne by the carton when the carton stops can be greatly reduced, and the service life of the carton is prolonged. The side face of the carton can be prevented from being pressed to sink, and the phenomenon that the bottom cover of the carton protrudes out of the carton body is avoided. The box sealing adhesive tape is prevented from being disengaged, and the carton boxing quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of carton packing on a carton packaging line, and more specifically, relates to a blocking and protecting structure for carton packing on a carton line. Background Art

[0002] The carton line refers to a carton packaging line, which is a production line composed of a series of automated equipment for automatically packing products into cartons. This production line can greatly improve the packing efficiency, reduce the labor cost, and ensure the packing quality and consistency. Among them, the packing section in the carton packaging line is one of the key links in the whole process, which is responsible for accurately placing the products from the conveyor line into the cartons of the carton line. Usually, when the carton moves to the packing position on the roller conveyor, it will be blocked by a raised baffle and stop. Then, the products are grabbed by a manipulator and placed into the carton here, thus realizing the packing work.

[0003] When the carton on the carton line conveyor moves through the rollers and reaches the packing position, after the baffle rises to block the carton, the moving carton will be subjected to a sudden resistance from the baffle, the side of the carton will be pressed to produce a depression, the bottom cover of the carton will protrude out of the box body, and there will also be a certain sign of detachment of the sealing tape; and when the packing is completed, at this time, when the baffle slides down, it may be interfered by the bottom cover, causing damage to the bottom cover, and may also cause the sealing tape to completely detach or tear, thus resulting in a poor blocking effect on the carton, which will affect the normal packing and conveying of the carton, and subsequent manual treatment is required, which is time-consuming and laborious, and the packing efficiency is low.

[0004] Therefore, it is necessary to provide a blocking and protecting structure for carton packing on a carton line to solve the above technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a blocking and protecting structure for carton packing on a carton line to solve the above technical problems.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A blocking and protecting structure for carton packing on a carton line is arranged on a conveying mechanism. The conveying mechanism is provided with a bracket and a plurality of rollers, and further includes:

[0008] A support plate and a telescopic member, both arranged on the bracket. The telescopic end of the telescopic member movably penetrates through the support plate and is provided with a lifting plate;

[0009] A blocking plate, arranged on the lifting plate, for blocking one side of the bottom of the carton;

[0010] A transmission mechanism and a linkage mechanism, respectively arranged on the support plate and the lifting plate. The linkage mechanism is connected with a protection roller;

[0011] When the telescopic member drives the lifting plate to move up and down, the cooperation of the transmission mechanism and the linkage mechanism enables the protective roller to move left and right synchronously when lifting.

[0012] As a further solution of the present invention: The transmission mechanism includes:

[0013] Two vertical plates are symmetrically arranged on the support plate. A first rotating shaft is rotatably arranged on the vertical plate, and a straight gear and a first bevel gear are arranged on the first rotating shaft;

[0014] A second rotating shaft is rotatably arranged on the support plate, and a second bevel gear meshing with the first bevel gear is arranged on the second rotating shaft.

[0015] As a further solution of the present invention: The linkage mechanism includes:

[0016] Two support rods and two supports are symmetrically arranged on the lifting plate. A first rack meshing with the straight gear is arranged on the support rod;

[0017] A sleeve is rotatably arranged on the support, and the sleeve is slidably sleeved outside the second rotating shaft. An external gear ring is arranged on the sleeve;

[0018] A second rack is slidably arranged on the lifting plate and meshes with the external gear ring. The protective roller is connected to the second rack.

[0019] As a further solution of the present invention: A plurality of limiting grooves are formed inside the sleeve, and limiting strips slidably adapted to the limiting grooves are arranged on the outer wall of the second rotating shaft.

[0020] As a further solution of the present invention: A sleeve block is arranged on the lifting plate, and a sliding cavity is formed in the sleeve block. The sliding cavity is slidably connected to the second rack.

[0021] As a further solution of the present invention: A sliding groove is formed in the sliding cavity, and a sliding strip slidably adapted to the sliding groove is arranged on the second rack.

[0022] As a further solution of the present invention: A cross plate is arranged on the second rack, and two support plates are arranged on the cross plate. The protective roller is rotatably arranged between the two support plates.

[0023] As a further solution of the present invention: A connecting plate is arranged on the lifting plate, and the connecting plate is connected to the blocking plate. The blocking plate is in an "L" shape.

[0024] As a further solution of the present invention: A fixing plate is arranged on the support, and a buffer roller is elastically arranged on the fixing plate, and the buffer roller is located between adjacent rollers.

[0025] As a further solution of the present utility model: a rotating rod is rotatably arranged on the fixing plate, a connecting rod and a torsion spring are arranged on the rotating rod, the other end of the torsion spring is connected to the fixing plate, and the buffer roller is rotatably connected to the connecting rod.

[0026] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0027] 1. In this solution, when the carton is about to move to the packing position, the lifting plate rises at this time, driving the blocking plate to rise. Through the cooperation of the transmission mechanism and the linkage mechanism, the protective roller will move upward and to the left at the same time. The carton will be blocked and limited by the protective roller, and at the same time, the carton will move slowly to the left. The protective roller can play a role in blocking and buffering the normally moving carton, that is, the carton can stop slowly and stably. Finally, the blocking plate further blocks and positions the bottom side of the carton. Through the dynamic buffering process of the protective roller on the carton, the resistance received by the carton when it stops can be greatly reduced, thereby preventing the carton from being indented due to side pressure, that is, avoiding the phenomenon that the bottom and lid of the carton protrude out of the carton body, and preventing the carton from deforming; preventing the sealing tape from coming off, and improving the quality of carton packing.

[0028] 2. In this solution, when the carton is packed, while the lifting plate drives the protective roller to descend, under the combined action of the transmission mechanism and the linkage mechanism, the protective roller also moves to the right at the same time. Through the protective roller, the carton will move slowly to the right. At the same time, the blocking plate gradually descends, which can prevent the blocking plate from directly sliding down from the bottom side of the carton and being interfered by the bottom lid of the carton, resulting in the damage of the carton, and also avoiding the situation that the blocking plate directly slides down and takes the sealing tape away, causing it to come off or be torn. The protection effect on the carton is good, and there is no need for manual subsequent reprocessing of the carton, which saves time and effort. While protecting the carton packing, it improves the packing quality and efficiency, and can be widely promoted and used.

[0029] 3. In this solution, when the carton approaches the packing position, the carton will contact the buffer roller, and the buffer roller will rotate under pressure. Through the buffer roller, a pre-deceleration buffering effect can be achieved on the carton, playing a good buffering role on the carton, reducing the impact force of the carton on the protective roller, and further protecting the carton; the buffer roller can also play an auxiliary supporting role on the bottom of the carton, better protecting the bottom lid of the carton. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a partial structural schematic diagram of the moving state of the carton of the present utility model on the roller of the conveying mechanism;

[0031] Figure 2 is Figure 1 a structural schematic diagram from the perspective of bottom upward view;

[0032] Figure 3 is the overall structural schematic diagram of the shielding structure of the present utility model;

[0033] Figure 4 is Figure 3 the enlarged structural schematic diagram at position A in

[0034] Figure 5 is Figure 3 the structural schematic diagram from the perspective of the other side;

[0035] Figure 6 is Figure 5 the enlarged structural schematic diagram at position B in

[0036] Figure 7 is Figure 2 the enlarged structural schematic diagram at position C in

[0037] Figure 8 is the structural schematic diagram of the carton of the present utility model in the state blocked by the protection roller and the blocking plate;

[0038] Figure 9 is Figure 8 the enlarged structural schematic diagram at position D in

[0039] Figure 10 is the structural schematic diagram of the protection roller and the blocking plate of the present utility model in the ascending state.

[0040] Explanation of the reference numerals in the figure:

[0041] 1. Bracket; 2. Roller; 3. Support plate; 4. Telescopic member; 5. Lifting plate; 6. Blocking plate; 7. Transmission mechanism; 71. Vertical plate; 72. First rotating shaft; 73. Straight gear; 74. First bevel gear; 75. Second rotating shaft; 76. Second bevel gear; 8. Linkage mechanism; 81. Support rod; 82. Support; 83. First rack; 84. Sleeve; 85. External gear ring; 86. Second rack; 9. Protection roller; 10. Sleeve block; 11. Sliding cavity; 12. Sliding bar; 13. Limiting groove; 14. Limiting bar; 15. Horizontal plate; 16. Bracket plate; 17. Connecting plate; 18. Fixed plate; 19. Buffer roller; 20. Rotating rod; 21. Connecting rod; 22. Torsion spring. Specific embodiments

[0042] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0043] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one such feature.

[0045] Please refer to Figures 1 - 10 , a shielding structure for carton line packing, which is arranged on a conveying mechanism. There are a bracket 1 and a plurality of rollers 2 on the conveying mechanism, and it further includes: a support plate 3 and a telescopic member 4, both arranged on the bracket 1. The telescopic end of the telescopic member 4 movably penetrates through the support plate 3 and is provided with a lifting plate 5. The telescopic member 4 in this application can adopt an electric telescopic cylinder; a blocking plate 6, arranged on the lifting plate 5, for blocking one side of the bottom of the carton; a transmission mechanism 7 and a linkage mechanism 8, respectively arranged on the support plate 3 and the lifting plate 5, and the linkage mechanism 8 is connected with a protective roller 9; when the telescopic member 4 drives the lifting plate 5 to lift or lower, through the cooperation of the transmission mechanism 7 and the linkage mechanism 8, the protective roller 9 will move left and right synchronously when lifting or lowering.

[0046] During use, the rotation of the rollers 2 on the conveying mechanism drives the carton to move, performing the conveying work of the carton. Taking Figures 1 - 2 as an example, when the carton is about to move to the packing position, at this time the telescopic member 4 drives the lifting plate 5 to rise. The lifting plate 5 will drive the blocking plate 6 to rise at this time. At the same time, the linkage mechanism 8 and the protective roller 9 will also rise. Initially, the protective roller 9 is located above the right side of the blocking plate 6. And when the lifting plate 5 rises, through the cooperation of the transmission mechanism 7 and the linkage mechanism 8, the protective roller 9 will move left simultaneously. At this time, when the carton contacts the protective roller 9, it will be blocked and limited by the protective roller 9. At the same time, the protective roller 9 will move left, and the carton will also move slowly to the left. At this time, the protective roller 9 can block and buffer the normally moving carton, enabling the carton to stop slowly and stably. Finally, when the protective roller 9 moves left to the limit position, at this time the carton also stops, and at the same time the blocking plate 6 also rises to the specified height. At this time, the blocking plate 6 will be stuck at the bottom side corner position of the carton, as Figures 8 - 9, the bottom side of the carton is further blocked by the blocking plate 6 to ensure the stability of the carton during packing. When the carton moves to the packing position, there is a dynamic buffering process for the carton by the protective roller 9, which can greatly reduce the resistance received by the carton when it stops, thus preventing the current situation where the side of the carton is pressed and indented, that is, avoiding the phenomenon that the bottom and lid of the carton protrude outward from the carton body, preventing the carton from deforming, and protecting the carton well; it also prevents the sealing tape from showing signs of coming off, improving the quality of carton packing, and having strong practicability.

[0047] After the carton is packed, at this time, the telescopic member 4 drives the lifting plate 5 to descend. While the lifting plate 5 drives the protective roller 9 to descend, under the combined action of the transmission mechanism 7 and the linkage mechanism 8, it also simultaneously makes the protective roller 9 move to the right. At this time, the carton will be driven to move slowly to the right by the protective roller 9. At the same time, the lifting plate 5 will drive the blocking plate 6 to gradually descend. Finally, the blocking plate 6 will gradually disengage from the carton. During the descent of the protective roller 9, it drives the carton to move to the right at the same time, which can make the carton gradually move away from the blocking plate 6 to the right, thus preventing the blocking plate 6 from directly sliding down from the bottom side of the carton and being interfered by the bottom and lid of the carton, which may cause the carton to be damaged. At the same time, it also avoids the situation where the direct sliding down of the blocking plate 6 will take the sealing tape away together, resulting in its disconnection or tearing. The protection effect on the carton blocking is good, which does not affect the normal packing and conveying of the carton, and there is no need for manual subsequent reprocessing of the carton, saving time and effort, protecting the carton during packing while improving the packing quality and efficiency, having strong practicability, and can be widely promoted and used. Until finally, when the lifting plate 5 drives the protective roller 9 to move downward and also disengage from the carton, the carton is no longer blocked, and then the roller 2 of the conveying mechanism can continue to drive the carton to move.

[0048] In this embodiment, preferably, please refer to Figures 2 - 6 and Figures 8 - 10 , the transmission mechanism 7 includes: vertical plates 71, there are two of them and they are symmetrically arranged on the support plate 3. The vertical plate 71 is rotatably provided with a first rotating shaft 72, and a spur gear 73 and a first bevel gear 74 are arranged on the first rotating shaft 72; a second rotating shaft 75 is rotatably arranged on the support plate 3, and a second bevel gear 76 meshing with the first bevel gear 74 is arranged on the second rotating shaft 75. When the telescopic member 4 drives the lifting plate 5 to rise or fall, the lifting plate 5 will drive the first rotating shaft 72 to rotate through the cooperation of the linkage mechanism 8. The first rotating shaft 72 will drive the spur gear 73 and the first bevel gear 74 to rotate. The first bevel gear 74 will drive the second bevel gear 76 and the second rotating shaft 75 to rotate. The second rotating shaft 75 will then drive the protective roller 9 to move left and right through the linkage mechanism 8.

[0049] In this embodiment, preferably, please refer to Figures 2 - 6 and Figures 8 - 10, the linkage mechanism 8 includes: two support rods 81 and two supports 82, which are symmetrically arranged on the lifting plate 5. A first rack 83 meshing with the spur gear 73 is provided on the support rod 81; a sleeve 84 is rotatably arranged on the support 82, and the sleeve 84 is slidably sleeved outside the second rotating shaft 75. An external gear ring 85 is provided on the sleeve 84; a second rack 86 is slidably arranged on the lifting plate 5 and meshes with the external gear ring 85, and the protective roller 9 is connected to the second rack 86. When the telescopic member 4 drives the lifting plate 5 to rise or fall, the lifting plate 5 will drive the support rod 81 and the first rack 83 to rise and fall. Through the first rack 83, the spur gear 73 will be driven to rotate, thereby driving the first rotating shaft 72 to rotate; when the second rotating shaft 75 rotates, it will drive the sleeve 84 to rotate. At the same time, the lifting plate 5 will drive the support 82 and the sleeve 84 to rise and fall, that is, the sleeve 84 will rise and fall along the second rotating shaft 75 while rotating. The rotation of the sleeve 84 will drive the external gear ring 85 to rotate, and the external gear ring 85 will drive the second rack 86 engaged with it to move left and right, and the second rack 86 will drive the protective roller 9 connected to it to move left and right.

[0050] In summary, taking Figures 1 - 3 as an example, when the lifting plate 5 rises, it will drive the first rack 83 to rise. The first rack 83 drives the spur gear 73 to rotate counterclockwise, so that the first rotating shaft 72 and the first bevel gear 74 rotate counterclockwise. The first bevel gear 74 will drive the second bevel gear 76 and the second rotating shaft 75 to rotate clockwise. At this time, the sleeve 84 rotates clockwise, and the external gear ring 85 on the sleeve 84 will drive the second rack 86 to move left, and the second rack 86 will drive the protective roller 9 to move left. Vice versa.

[0051] In this embodiment, preferably, please refer to Figures 3 - 6 and Figures 9 - 10 , a plurality of limiting grooves 13 are formed inside the sleeve 84, and limiting strips 14 slidably adapted to the limiting grooves 13 are arranged on the outer wall of the second rotating shaft 75. When the sleeve 84 rotates, the support 82 will drive the sleeve 84 to move up or down. At this time, the limiting strips 14 on the sleeve 84 will move along the limiting grooves 13, which can ensure that the sleeve 84 moves up and down while rotating.

[0052] In this embodiment, preferably, please refer to Figures 3 - 4 and Figures 9 - 10 , a sleeve block 10 is arranged on the lifting plate 5, and a sliding cavity 11 is formed in the sleeve block 10. The sliding cavity 11 is slidably connected to the second rack 86. When the second rack 86 moves, it will move left and right along the sliding cavity 11 on the sleeve block 10. The sleeve block 10 can limit and support the second rack 86.

[0053] A chute is provided in the sliding cavity 11, and a sliding strip 12 that is slidably adapted to the chute is provided on the second rack 86. When the second rack 86 moves, it will drive the sliding strip 12 to slide along the chute of the sliding cavity 11. The sliding stability of the second rack 86 can be improved through the sliding strip 12.

[0054] In this embodiment, preferably, please refer to Figures 1 - 3 , Figures 5 - 6 and Figures 8 - 10 , a cross plate 15 is provided on the second rack 86, and two support plates 16 are provided on the cross plate 15. The protective roller 9 is rotatably arranged between the two support plates 16. When the second rack 86 moves, it will drive the cross plate 15 and the support plates 16 to move, and further drive the protective roller 9 on the support plates 16 to move. The protective roller 9 can rotate along the rotation point of the support plates 16, so that the protective roller 9 can roll along the cardboard box, reducing the friction between it and the cardboard box, making the protective roller 9 move more smoothly, and also reducing the impact on the cardboard box.

[0055] In this embodiment, preferably, please refer to Figures 2 - 6 and Figures 9 - 10 , a connecting plate 17 is provided on the lifting plate 5, and the connecting plate 17 is connected to the blocking plate 6. The blocking plate 6 is in an "L" shape. When the lifting plate 5 moves up and down, it will drive the connecting plate 17 and the blocking plate 6 to move up and down. Through the "L" shape of the blocking plate 6, the bottom and side of the cardboard box can be limited and blocked, and the blocking effect on the cardboard box is good. The blocking plate 6 can support the bottom of the cardboard box, greatly preventing the situation that the bottom cover of the cardboard box protrudes from the box body, and the use effect is good.

[0056] In this embodiment, preferably, please refer to Figure 2 and Figure 7 , a fixing plate 18 is provided on the support 1, and a buffer roller 19 is elastically arranged on the fixing plate 18, and the buffer roller 19 is located between adjacent rollers 2. When the cardboard box moves along the roller 2 and approaches the packing position, the cardboard box will gradually contact the buffer roller 19 first and squeeze the buffer roller 19. The buffer roller 19 will then rotate under pressure. The cardboard box continues to move and is then blocked and limited by the blocking plate 6 and the protective roller 9. The buffer roller 19 can have a pre-deceleration buffering effect on the cardboard box, playing a good buffering role for the cardboard box, greatly reducing the impact force of the cardboard box on the protective roller 9, further protecting the cardboard box, and having good protection performance; the buffer roller 19 is located at the bottom of the cardboard box and can also play an auxiliary supporting role for the bottom of the cardboard box, better protecting the bottom cover of the cardboard box.

[0057] In this embodiment, preferably, please refer to Figure 2 and Figure 7, a rotating rod 20 is rotatably arranged on the fixing plate 18, a connecting rod 21 and a torsion spring 22 are arranged on the rotating rod 20, the other end of the torsion spring 22 is connected to the fixing plate 18, and the buffer roller 19 is rotatably connected to the connecting rod 21. When the cardboard box drives the buffer roller 19 to rotate, the buffer roller 19 will rotate along the rotating rod 20 through the connecting rod 21 and compress the torsion spring 22. When the cardboard box is removed from the buffer roller 19, the resilience of the torsion spring 22 will drive the rotating rod 20 and the buffer roller 19 to rotate back to the initial state.

[0058] It should be understood that the examples and embodiments described herein are only for illustration and not for limiting the present utility model. Those skilled in the art can make various modifications or changes according to it. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

[0059] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0060] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, "a plurality" means more than two. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

Claims

1. A blocking and protecting structure for carton line packing, which is arranged on a conveying mechanism. The conveying mechanism is provided with a bracket (1) and a plurality of rollers (2), and is characterized in that, It further includes: A support plate (3) and a telescopic member (4), both provided on the bracket (1), the telescopic end of the telescopic member (4) movably penetrates through the support plate (3) and is provided with a lifting plate (5); A blocking plate (6), provided on the lifting plate (5), for blocking one side of the bottom of the carton; A transmission mechanism (7) and a linkage mechanism (8), respectively provided on the support plate (3) and the lifting plate (5), the linkage mechanism (8) is connected with a protective roller (9); When the telescopic member (4) drives the lifting plate (5) to lift or lower, the protective roller (9) will move left and right synchronously during lifting or lowering through the cooperation of the transmission mechanism (7) and the linkage mechanism (8).

2. The carton line packing shielding structure according to claim 1, characterized in that, The transmission mechanism (7) includes: Two vertical plates (71), symmetrically provided on the support plate (3), the vertical plate (71) is rotatably provided with a first rotating shaft (72), and a spur gear (73) and a first bevel gear (74) are provided on the first rotating shaft (72); A second rotating shaft (75), rotatably provided on the support plate (3), and a second bevel gear (76) meshing with the first bevel gear (74) is provided on the second rotating shaft (75).

3. The cardboard box line packing protection structure according to claim 2, characterized in that, The linkage mechanism (8) includes: Two support rods (81) and two supports (82), symmetrically provided on the lifting plate (5), and a first rack (83) meshing with the spur gear (73) is provided on the support rod (81); A sleeve (84), rotatably provided on the support (82), and the sleeve (84) is slidably sleeved outside the second rotating shaft (75), and an external gear ring (85) is provided on the sleeve (84); A second rack (86), slidably provided on the lifting plate (5), and meshing with the external gear ring (85), and the protective roller (9) is connected with the second rack (86).

4. The carton line packing protection structure according to claim 3, characterized in that, A plurality of limiting grooves (13) are formed inside the sleeve (84), and a limiting strip (14) slidably adapted to the limiting grooves (13) is provided on the outer wall of the second rotating shaft (75).

5. The carton line packing protection structure according to claim 3, characterized in that, A sleeve block (10) is provided on the lifting plate (5), a sliding cavity (11) is formed in the sleeve block (10), and the sliding cavity (11) is slidably connected with the second rack (86).

6. The carton line packing protection structure according to claim 5, characterized in that, A sliding groove is formed in the sliding cavity (11), and a sliding strip (12) slidably adapted to the sliding groove is provided on the second rack (86).

7. The carton line packing protection structure according to claim 3, characterized in that, A cross plate (15) is provided on the second rack (86), two support plates (16) are provided on the cross plate (15), and the protective roller (9) is rotatably provided between the two support plates (16).

8. The carton line packing protection structure according to claim 1, characterized in that, A connecting plate (17) is provided on the lifting plate (5), the connecting plate (17) is connected with the blocking plate (6), and the blocking plate (6) is in an "L" shape.

9. The carton line packing protection structure according to claim 1, characterized in that A fixing plate (18) is provided on the bracket (1), a buffer roller (19) is elastically provided on the fixing plate (18), and the buffer roller (19) is located between adjacent rollers (2).

10. The carton line packing protection structure according to claim 9, characterized in that, A rotating rod (20) is rotatably arranged on the fixed plate (18). A connecting rod (21) and a torsion spring (22) are arranged on the rotating rod (20). The other end of the torsion spring (22) is connected to the fixed plate (18). The buffer roller (19) is rotatably connected to the connecting rod (21).

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