Carton conveying device

Abstract

The invention relates to the field of carton conveying, and provides a carton conveying device which comprises a conveying assembly and a limiting and guiding assembly. The conveying assembly is used for conveying the stacked cartons; the limiting guide assembly comprises a first mounting frame, a rotary driving unit and a guide wheel set, the guide wheel set comprises guide wheels and pressing pieces which are alternately arranged in the conveying direction, the guide wheels and the pressing pieces are rotationally connected with the first mounting frame, the pressing pieces are provided with abutting parts, and the pressing pieces are connected with the rotary driving unit; the rotation driving unit is used for driving the pressing piece to rotate so that the limiting guide assembly can be switched between the first state and the second state. In the first state, the guide wheel abuts against the top of the stacked carton, and the front end of the stacked carton is located below one of the downward pressing pieces; and in the second state, the front end of the stacked carton is located below one guide wheel, and the abutting part of the adjacent downward pressing piece corresponding to the rear side of the guide wheel abuts against the top of the stacked carton. The problem that stable conveying of stacked cartons is difficult to achieve is solved.

Description

Technical Field

[0001] The present application relates to the field of carton conveying, and in particular to a carton conveying device. Background Art

[0002] Cardboard boxes are widely used in industries such as logistics and packaging to package products. During the carton production process, cartons are typically delivered, packaged, and sold in a folded state. When the customer uses the carton, the folded box is unfolded to hold the product.

[0003] During the carton conveying process, to improve conveying efficiency and packaging requirements, multiple folded cartons are usually stacked on top of each other and then conveyed to a baler for packaging. However, there is a risk of stacked cartons tipping over during conveyance. Therefore, a limiting guide mechanism such as guide wheels is usually installed above the conveyor device. The guide wheels limit the stacked cartons in the vertical direction and apply a certain downward pressure to the stacked cartons, thereby preventing the stacked cartons from tipping over.

[0004] Because stacked cartons have significant deformability, when the guide wheels come into contact with the stacked cartons, the stacked cartons compress downward. However, when the front end of a stacked cartons detaches from the previous guide wheel and before encountering the next guide wheel, the front end of the stacked cartons tends to rebound, causing the front end of the stacked cartons to be higher than the bottom of the guide wheels. This situation can cause the front end of the stacked cartons to collide with the guide wheels. Although the front end of the stacked cartons can still be stuck under the guide wheels if the height difference between the front end of the stacked cartons and the bottom of the guide wheels is small, when the top cartons come into contact with the guide wheels, the top cartons are subjected to a backward force, which can cause the top cartons to move backward relative to the other cartons, causing them to fall and increasing the risk of the remaining stacked cartons to topple over. Especially when the cartons are small, the number of guide wheels that the cartons simultaneously contact is small, making the stacked cartons more prone to toppling and falling, making it difficult to ensure stable transportation of the cartons. Summary of the Invention

[0005] In order to solve the problem that stacked cartons are difficult to transport stably, the present application provides a carton conveying device.

[0006] The present application provides a carton conveying device that adopts the following technical solution: A carton conveying device, comprising: A conveying assembly for conveying stacked cartons; A position limiting guide assembly includes a first mounting frame, a rotation drive unit, and a guide wheel group, wherein the guide wheel group includes a plurality of guide wheels and a plurality of pressing members alternately arranged along a conveying direction, wherein the guide wheels and the pressing members are both rotatably connected to the first mounting frame, the pressing member having an abutment portion for abutting the stacked cartons located therebelow, and the plurality of pressing members are all connected to the rotation drive unit, and the rotation drive unit is used to drive the pressing members to rotate, thereby switching the position limiting guide assembly between a first state and a second state; In the first state, at least one of the guide wheels abuts against the top of the stacking carton, and the front end of the stacking carton is located below one of the pressing members and does not contact the corresponding pressing member; In the second state, the front end of the stacking carton is located below one of the guide wheels and does not contact the corresponding guide wheel, and the abutment portion of the pressing member adjacent to the rear side of the corresponding guide wheel abuts against the top of the stacking carton.

[0007] By adopting the above technical solution, the carton conveying device can achieve stable conveying of stacked cartons. The guide wheels and the pressing member in the limiting guide assembly are alternately arranged and can be switched between the first state and the second state as needed, thereby ensuring the stability of the posture of the stacked cartons during the conveying process. In the first state, the guide wheel abuts against the top of the stacked cartons, effectively preventing the cartons from shifting. At this time, the front end of the stacked cartons does not contact the pressing member, avoiding collision; in the second state, the abutting portion of the pressing member abuts against the top of the stacked cartons, further pressing down the stacked cartons, reducing the overall height of the stacked cartons, so that the front end of the stacked cartons can smoothly enter under the guide wheel.

[0008] Optionally, when the pressing member rotates, the linear speed of the abutting portion of the pressing member is equal to the conveying speed of the conveying assembly.

[0009] By adopting the above technical solution, by making the linear speed of the abutment part equal to the conveying speed of the conveying assembly, it is ensured that the relative position of the abutment part and the stacked cartons remains stable during the contact process with the top of the stacked cartons, thereby avoiding the carton deviation caused by speed difference and improving the stability of the carton conveying process.

[0010] Optionally, the position limiting guide assembly further includes a first lifting drive unit, which is connected to the first mounting bracket and is used to drive the first mounting bracket to move up and down.

[0011] By adopting the above technical solution, the position limiting guide assembly is equipped with a first lifting drive unit, enabling the first mounting frame to achieve a lifting motion. This design effect is that the lifting function of the first mounting frame enables the position limiting guide assembly to adapt to stacked cartons of different heights, thereby improving the versatility and applicability of the device.

[0012] Optionally, the position limiting guide assembly further includes a second lifting drive unit, a second mounting frame and a lower pressing wheel assembly; The second mounting bracket is slidably connected to the first mounting bracket; The lower pressing wheel assembly includes at least one lower pressing wheel, and the lower pressing wheel is rotatably connected to the second mounting frame; The second lifting drive unit is provided on the first mounting frame, and the second lifting drive unit is connected to the second mounting frame and is used to drive the second mounting frame to move up and down so that the lower pressing wheel presses the stacked cartons downward.

[0013] By adopting the above technical solution, the position-limiting guide assembly is equipped with a second lifting drive unit, a second mounting frame, and a lower pressure wheel assembly. The second mounting frame is slidably connected to the first mounting frame, and the lower pressure wheel is rotationally connected to the second mounting frame. The second lifting drive unit drives the second mounting frame up and down, causing the lower pressure wheel to press the stacked cartons downward. This design effectively presses the stacked cartons downward, ensuring that they can smoothly enter under the guide wheel and ensure stable transportation.

[0014] Optionally, the carton conveying device further comprises a positioning assembly, wherein the positioning assembly comprises a positioning drive unit and two positioning plates; The two positioning plates are spaced apart and the spacing direction is perpendicular to the conveying direction of the conveying assembly; The positioning drive unit is connected to the two positioning plates and is used to drive the two positioning plates to move closer to or away from each other, thereby positioning the stacked cartons.

[0015] By adopting the above technical solution, the positioning component can adjust the position of each stacked cartons, so that each cartons are aligned with each other in a direction perpendicular to the conveying direction. On the one hand, it reduces the risk of stacked cartons tipping over, and on the other hand, it also facilitates subsequent packaging.

[0016] Optionally, the positioning assembly is used to position the stacked cartons in the first state.

[0017] By adopting the above technical solution, the positioning assembly can accurately position stacked cartons when the carton conveyor is in the first state. Specifically, compared to the second state, when in the first state, the downward force exerted on the stacked cartons is smaller, and the friction between the cartons and between the cartons and the limiting guide assembly is smaller, making it easier for the positioning assembly to position the stacked cartons.

[0018] Optionally, the conveying assembly includes a roller conveying mechanism having a conveying roller; The bottom height of the positioning plate is lower than the top height of the conveying roller, and the bottom of the positioning plate is provided with a groove adapted to the conveying roller.

[0019] By adopting the above technical solution, the bottom height of the positioning plate is lower than the top height of the conveyor roller, and the bottom of the positioning plate is provided with a groove adapted to the conveyor roller, which can effectively avoid interference between the positioning plate and the conveyor roller, ensuring that the positioning plate can accurately position all cartons and will not hinder the normal operation of the conveyor roller during positioning.

[0020] Optionally, the carton conveying device further comprises a pushing assembly, and the pushing assembly comprises a pushing drive unit and a pushing piece; The front side of the pusher is provided with an abutment plate; The pushing drive unit is connected to the pushing member and is used to drive the pushing member to push the stacked cartons to move along the conveying direction, so that the stacked cartons abut against the abutting plate.

[0021] By adopting the above technical solution, the pusher assembly can effectively push the stacked cartons along the conveying direction, thereby conveying the stacked cartons to the baler or other process. The abutment plate on the front side of the pusher enables the pusher to push the stacked cartons into contact with the abutment plate, thereby aligning the cartons in the conveying direction.

[0022] Optionally, the conveying roller is provided with a recessed portion corresponding to the pushing member, and when the pushing member pushes the stacked cartons to move, the bottom of the pushing member extends into the corresponding recessed portion.

[0023] By adopting this technical solution, the bottom of the pusher can extend into the recessed portion of the conveyor roller when pushing the stacked cartons, effectively preventing interference between the pusher and the conveyor roller. This design makes the pushing action smoother and ensures that all cartons can contact the pusher, improving the stability of the carton conveying process.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By alternating the guide wheels and the lower pressure piece in the position-limiting guide assembly and controlling the rotary drive unit, the height of stacked cartons can be flexibly adjusted under different conditions, effectively preventing collision or jamming between the front end of the cartons and the position-limiting guide assembly, thereby improving the stability and reliability of the conveying process. 2. The lower pressing wheel group can press down the stacked cartons, so that the stacked cartons can smoothly enter under the guide wheel, avoiding the collision between the front end of the carton and the guide wheel, which will cause the top carton to move backward; 3. The positioning component and the pushing component can position the stacked cartons from different directions, so that the cartons are aligned with each other, which improves the stability of carton transportation and facilitates the subsequent packaging of the stacked cartons. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the carton conveying device provided in this application.

[0026] Figure 2 It is a schematic diagram of the partial three-dimensional structure of the carton conveying device provided in this application.

[0027] Figure 3 This application provides Figure 2 Enlarged schematic diagram of point A in the middle.

[0028] Figure 4 This is a front view of the carton conveying device provided in this application.

[0029] Figure 5 This application provides Figure 4 Cross-sectional view at the middle BB.

[0030] Figure 6 It is a partial schematic diagram of the limiting guide assembly of the carton conveying device provided in this application.

[0031] Figure 7 This is a partial schematic diagram of the position limiting guide assembly provided in the present application when it is in the first state.

[0032] Figure 8 This is a partial schematic diagram of the position limiting guide assembly provided in the present application when it is in the second state.

[0033] Figure 9 This is a partial top view of the limiting guide assembly provided in this application.

[0034] Description of reference numerals: 1. Frame; 2. Conveying assembly; 21. Conveying roller; 211. Recessed portion; 3. Position limiting guide assembly; 31. First lifting drive unit; 32. First mounting bracket; 33. Rotation drive unit; 331. Rotation drive motor; 34. Guide wheel assembly; 341. Guide wheel; 342. Pressing member; 3421. Abutment portion; 35. Second lifting drive unit; 36. Second mounting bracket; 37. Pressing wheel assembly; 4. Positioning assembly; 41. Positioning drive unit; 42. Positioning plate; 421. Groove; 5. Pusher assembly; 51. Pusher drive unit; 511. Mounting base; 512. Guide rail; 513. Lifting cylinder; 514. Pusher motor; 515. Pusher transmission mechanism; 5151. Transmission belt; 5152. Transmission pulley; 52. Pusher; 200. Stack cartons. DETAILED DESCRIPTION

[0035] The following is combined with Figures 1 to 9 This application is described in further detail.

[0036] like Figures 1 to 9 As shown, an embodiment of the present application discloses a carton conveying device, including a frame 1, a conveying component 2 and a limiting guide component 3.

[0037] The conveyor assembly 2 and the limiting guide assembly 3 are both mounted on the frame 1. The conveyor assembly 2 can be a roller conveyor mechanism, with the stacked cartons 200 placed on the conveyor rollers 21 of the roller conveyor mechanism. The stacked cartons 200 are conveyed by the rotation of the conveyor rollers 21. The method for driving the conveyor rollers 21 to rotate is relatively conventional and will not be described in detail here.

[0038] The position limiting guide assembly 3 includes a first lifting drive unit 31 , a first mounting frame 32 , a rotation drive unit 33 and a guide wheel assembly 34 .

[0039] A first lifting drive unit 31 is provided on the frame 1 and is connected to the first mounting frame 32. The first lifting drive unit 31 is used to drive the first mounting frame 32 upward and downward, thereby appropriately adjusting the height of the first mounting frame 32 according to the heights of stacked cartons 200. The structure of the first lifting drive unit 31 is not strictly limited. For example, it can be a pneumatic cylinder or a motor-screw drive mechanism.

[0040] The guide wheel assembly 34 includes a plurality of guide wheels 341 and a plurality of pressing members 342 arranged alternately along the conveying direction. The guide wheels 341 and the pressing members 342 are both rotatably connected to the first mounting frame 32. When the stacked cartons 200 are being conveyed, the guide wheels 341 are positioned above the stacked cartons 200 and limit the position of the stacked cartons 200. The pressing members 342 have abutment portions 3421 for abutting against the stacked cartons 200 located below them. The plurality of pressing members 342 are each connected to a rotational drive unit 33, which is configured to drive the pressing members 342 to rotate, thereby switching the position-limiting guide assembly 3 between the first and second states.

[0041] like Figure 2 、 Figure 6 and Figure 7As shown, in the first state, at least one guide wheel 341 abuts against the top of the stacking carton 200 , and the front end of the stacking carton 200 is located below one of the pressing members 342 and does not contact the corresponding pressing member 342 .

[0042] Specifically, during the conveying process of the stacking carton 200, when the front end of the stacking carton 200 moves between the two guide wheels 341, the guide wheel 341 located at the rear side abuts against the top of the stacking carton 200, thereby limiting the position of the stacking carton 200 and preventing it from deflecting to a certain extent. At this time, the bottom height of the pressing member 342 is higher than the bottom height of the guide wheel 341, and regardless of whether the front end of the stacking carton 200 is tilted upward, the front end of the stacking carton 200 will never contact the pressing member 342 during the process of moving below the pressing member 342.

[0043] As the stacking carton 200 continues to move forward, the pressing member 342 continues to rotate. When the front end of the stacking carton 200 is about to encounter the guide wheel 341 located at the front side, the abutment portion 3421 of the pressing member 342 can contact the top of the stacking carton 200 and press the stacking carton 200 downward, causing the overall height of the stacking carton 200 to further drop, thereby making the front end of the stacking carton 200 lower than the bottom height of the guide wheel 341 located at the front side. When the stacking carton 200 encounters the guide wheel 341 located at the front side, the front end of the stacking carton 200 can directly enter under the guide wheel 341 without contacting the guide wheel 341, thereby avoiding displacement of the stacking carton 200 due to collision. At this time, the limiting guide assembly 3 is in the second state. Figure 2 、 Figure 6 and Figure 8 As shown, in the second state, the front end of the stacking carton 200 is located below one of the guide wheels 341 and does not contact the corresponding guide wheel 341, and the abutment portion 3421 of the lower pressing piece 342 adjacent to the rear side of the corresponding guide wheel 341 abuts against the top of the stacking carton 200.

[0044] Afterwards, as the stacking carton 200 continues to move and the pressing member 342 continues to rotate, the pressing member 342 can be separated from the stacking carton 200 again, and the stacking carton 200 rebounds and contacts the guide wheel 341. The above process is repeated, so that during the entire conveying process, the pressing member 342 and the guide wheel 341 only contact the top of the stacking carton 200 except the front end, thereby preventing the front end of the stacking carton 200 from colliding with the guide wheel 341 or the pressing member 342, which would cause the stacking carton 200 to shift.

[0045] like Figure 2 、 Figure 6 and Figure 9As shown, the rotation drive unit 33 may include a rotation drive motor 331 and multiple groups of belt-pulley transmission mechanisms. The pressing member 342 is rotationally connected to the first mounting frame 32 via a rotating shaft, and any two adjacent rotating shafts are transmission-connected via a belt-pulley transmission mechanism, and the rotation drive motor 331 is transmission-connected to one of the rotating shafts. By driving the rotating shaft to rotate by the rotation drive motor 331, multiple pressing members 342 can be rotated synchronously. Of course, different pressing members 342 can also be driven separately by different rotation drive motors 331, thereby realizing separate control of the pressing members 342. The specific setting method can be rotated according to actual needs and is not mandatory.

[0046] Furthermore, when the pressing member 342 rotates, the linear speed of the abutting portion 3421 of the pressing member 342 is equal to the conveying speed of the conveying assembly 2, thereby preventing relative sliding between the abutting portion 3421 and the stacking cartons 200 and causing the stacking cartons 200 to deflect.

[0047] like Figure 2 、 Figure 5 and Figure 6 As shown, in some embodiments, the position limiting guide assembly 3 further includes a second lifting drive unit 35 , a second mounting frame 36 and a lower pressing wheel assembly 37 .

[0048] The second mounting frame 36 is slidably connected to the first mounting frame 32. The second lifting drive unit 35 is provided on the first mounting frame 32. The second lifting drive unit 35 is connected to the second mounting frame 36 and is used to drive the second mounting frame 36 to move up and down. The second lifting drive unit 35 can be a cylinder.

[0049] The lower pressing wheel group 37 is positioned at the rear side of the guide wheel group 34. The lower pressing wheel group 37 includes at least one lower pressing wheel, which is rotatably connected to the second mounting frame 36. When the stacking carton 200 moves to the below of the lower pressing wheel, the second lifting drive unit 35 controls the second mounting frame 36 and the lower pressing wheel to descend so that the lower pressing wheel downwardly squeezes the stacking carton 200, reduces the overall height of the stacking carton 200, thereby making it easier for the front end of the stacking carton 200 to reach the below of the guide wheel 341. When the front end of the stacking carton 200 arrives below the guide wheel 341, the second lifting drive unit 35 controls the second mounting frame 36 and the lower pressing wheel to rise, and the stacking carton 200 rebounds and contacts with the guide wheel 341.

[0050] The second lifting drive unit 35 and the rotation drive unit 33 can be used in conjunction with an incoming material sensor and a control module. The incoming material sensor can be an infrared sensor, which determines the position of the stacked cartons 200, allowing the control module to control the second lifting drive unit 35 and the rotation drive unit 33 to perform the set action at the appropriate time.

[0051] like Figures 1 to 4As shown, in some embodiments, the carton conveying device further includes a positioning assembly 4 , which includes a positioning drive unit 41 and two positioning plates 42 .

[0052] The two positioning plates 42 are spaced apart and the spacing direction is perpendicular to the conveying direction of the conveying assembly 2. The two positioning plates 42 are parallel to each other.

[0053] The positioning drive unit 41 includes two positioning drive modules, which are connected to the positioning plates 42 in a one-to-one correspondence. The positioning drive modules may be cylinders.

[0054] The two positioning drive modules can drive the two positioning plates 42 to move closer to or further away from each other. When the stacked cartons 200 are moved between the two positioning plates 42, the two positioning plates 42 move closer to each other to position the stacked cartons 200 so that each cartons is aligned along the spacing direction of the two positioning plates 42.

[0055] The positioning assembly 4 is used to position the stacking cartons 200 in the first state. At this point, the top of the stacking cartons 200 abuts the guide wheel 341. Compared to abutting the abutment portion 3421 of the downward pressure member 342, when the top of the stacking cartons 200 abuts the guide wheel 341, the downward pressure on the stacking cartons 200 is less, and the friction between the cartons is also less, making it easier to position the stacking cartons 200.

[0056] Furthermore, the bottom height of the positioning plate 42 is lower than the top height of the conveyor roller 21, and the bottom of the positioning plate 42 is provided with a groove 421 adapted to the conveyor roller 21, so that a part of the positioning plate 42 can extend into the gap between adjacent conveyor rollers 21, ensuring that when the two positioning plates 42 approach each other, the positioning plates 42 can contact all cartons at the same time, and there will be no interference between the positioning plates 42 and the conveyor roller 21.

[0057] like Figure 2 、 Figure 3 and Figure 5 As shown, in some embodiments, the carton conveying device further includes a pushing assembly 5, which includes a pushing drive unit 51 and a pushing member 52. The pushing drive unit 51 is connected to the pushing member 52, and the pushing drive unit 51 can drive the pushing member 52 to push the stacked cartons 200 to move along the conveying direction, thereby conveying the stacked cartons 200 to the baler to complete the packaging.

[0058] Specifically, the front side of the pusher 52 is provided with an abutment plate, which can be installed on the baler. The pusher drive unit 51 drives the pusher 52 to push the stacked cartons 200 until they abut against the abutment plate, thereby positioning each cartons in the conveying direction. After positioning is completed, the baler proceeds with the baling process.

[0059] There may be multiple pushers 52 , so that the stacked cartons 200 can be pushed more smoothly to prevent the moving path of the stacked cartons 200 from being deviated.

[0060] The pusher drive unit 51 includes a mounting base 511 , a guide rail 512 , a lifting cylinder 513 , a pusher motor 514 and at least one set of pusher transmission mechanisms 515 .

[0061] A guide rail 512 is provided on the frame 1 along the conveying direction, and a mounting base 511 is slidably mounted on the guide rail 512. A lifting cylinder 513 is provided on the mounting base 511 and connected to the pusher 52. The lifting cylinder 513 is used to drive the pusher 52 up and down. The pusher motor 514 is connected to the mounting base 511 via a pusher transmission mechanism 515 and is used to drive the mounting base 511 and the pusher 52 to move along the conveying direction.

[0062] Specifically, the pusher transmission mechanism 515 corresponds one-to-one with the pusher member 52. The pusher transmission mechanism 515 includes a transmission belt 5151 and two transmission pulleys 5152. The two transmission pulleys 5152 are spaced apart along the conveying direction and are both rotatably connected to the frame 1. The two transmission pulleys 5152 are connected to each other via the transmission belt 5151. The transmission belt 5151 is connected to the mounting base 511, and the pusher motor 514 is in transmission connection with the transmission pulleys 5152. The pusher motor 514 drives the transmission pulleys 5152 to rotate, thereby causing the mounting base 511 to slide along the guide rail 512.

[0063] Furthermore, a recessed portion 211 corresponding to the pushing piece 52 is provided on the conveying roller 21. When the pushing piece 52 pushes the stacked cartons 200 to move, the bottom of the pushing piece 52 extends into the corresponding recessed portion 211, so that when the pushing piece 52 pushes the stacked cartons 200 to move, the pushing piece 52 can contact all cartons; at the same time, the pushing piece 52 will not interfere with the conveying roller 21.

Claims

1. A carton conveying device, characterized in that: include: A conveying assembly (2) for conveying stacked cartons (200); A position limiting guide assembly (3) comprising a first mounting frame (32), a rotation drive unit (33) and a guide wheel assembly (34), wherein the guide wheel assembly (34) comprises a plurality of guide wheels (341) and a plurality of pressing members (342) alternately arranged along a conveying direction, wherein the guide wheels (341) and the pressing members (342) are both rotatably connected to the first mounting frame (32), the pressing member (342) having an abutting portion (3421) for abutting against the stacked cartons (200) located below the pressing member, and the plurality of pressing members (342) are all connected to the rotation drive unit (33), and the rotation drive unit (33) is used to drive the pressing members (342) to rotate, thereby switching the position limiting guide assembly (3) between a first state and a second state; In the first state, at least one of the guide wheels (341) abuts against the top of the stacking carton (200), and the front end of the stacking carton (200) is located below one of the pressing members (342) and does not contact the corresponding pressing member (342); In the second state, the front end of the stacking carton (200) is located below one of the guide wheels (341) and does not contact the corresponding guide wheel (341), and the abutting portion (3421) of the pressing member (342) adjacent to the rear side of the corresponding guide wheel (341) abuts against the top of the stacking carton (200).

2. The carton conveying device according to claim 1, characterized in that: When the pressing member (342) rotates, the linear speed of the abutting portion (3421) of the pressing member (342) is equal to the conveying speed of the conveying assembly (2).

3. The carton conveying device according to claim 1, characterized in that: The position limiting guide assembly (3) further comprises a first lifting drive unit (31), wherein the first lifting drive unit (31) is connected to the first mounting frame (32) and is used to drive the first mounting frame (32) to move up and down.

4. The carton conveying device according to claim 1, characterized in that: The position limiting guide assembly (3) further includes a second lifting drive unit (35), a second mounting frame (36) and a lower pressing wheel assembly (37); The second mounting frame (36) is slidably connected to the first mounting frame (32); The lower pressing wheel assembly (37) includes at least one lower pressing wheel, and the lower pressing wheel is rotatably connected to the second mounting frame (36); The second lifting drive unit (35) is provided on the first mounting frame (32), and the second lifting drive unit (35) is connected to the second mounting frame (36) and is used to drive the second mounting frame (36) to move up and down, so that the lower pressing wheel presses the stacked cartons (200) downward.

5. The carton conveying device according to claim 1, characterized in that: The carton conveying device further comprises a positioning assembly (4), wherein the positioning assembly (4) comprises a positioning drive unit (41) and two positioning plates (42); The two positioning plates (42) are spaced apart and the spacing direction is perpendicular to the conveying direction of the conveying assembly (2); The positioning drive unit (41) is connected to the two positioning plates (42) and is used to drive the two positioning plates (42) to move closer to or farther from each other, thereby positioning the stacked cartons (200).

6. The carton conveying device according to claim 5, characterized in that: The positioning assembly (4) is used to position the stacked cartons (200) in the first state.

7. The carton conveying device according to claim 5, characterized in that: The conveying assembly (2) comprises a roller conveying mechanism, wherein the roller conveying mechanism has a conveying roller (21); The bottom height of the positioning plate (42) is lower than the top height of the conveying roller (21), and the bottom of the positioning plate (42) is provided with a groove (421) adapted to the conveying roller (21).

8. The carton conveying device according to claim 7, characterized in that: The carton conveying device further comprises a material pushing assembly (5), wherein the material pushing assembly (5) comprises a material pushing drive unit (51) and a material pushing member (52); The front side of the pusher (52) is provided with an abutment plate; The pushing drive unit (51) is connected to the pushing member (52) and is used to drive the pushing member (52) to push the stacking carton (200) to move along the conveying direction, so that the stacking carton (200) abuts against the abutment plate.

9. The carton conveying device according to claim 8, characterized in that: The conveying roller (21) is provided with a recessed portion (211) corresponding to the pushing member (52); when the pushing member (52) pushes the stacked cartons (200) to move, the bottom of the pushing member (52) extends into the corresponding recessed portion (211).

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