A device for straightening stacked cartons

Abstract

The application discloses a kind of stacking carton square device, including conveying device, the stacking table of placing carton, connecting in the connecting plate between the conveying device and the stacking table, fixed in the fixed table of the stacking table surface and the electric push rod fixed in the top of fixed table, the connecting plate one end and conveying device inner wall fixed connection, the stacking carton square device further includes: setting in the lifting device for lifting the stacking table surface for lifting the carton placed in the stacking table surface, by the lifting action of sliding plate, the last carton is temporarily supported, and the height difference is formed in vertical direction with the next carton conveyed, and by the slope interference of push rod one and push block, sliding plate is forced to actively horizontally retract, which effectively avoids the direct collision of two cartons in conveying junction due to different horizontal speeds.

Description

Technical Field

[0001] This invention relates to the field of stacking carton squarening devices, specifically to a stacking carton squarening device. Background Technology

[0002] Existing automatic cardboard box stacking and squarening devices are widely used in logistics, packaging, and end-of-line palletizing processes. Their basic function is to achieve automatic collection, sorting, and stacking of cardboard boxes.

[0003] Patent publication number CN110526019B includes a paper feeding mechanism, a tapping mechanism, and a limiting mechanism mounted on a frame. The paper feeding mechanism comprises multiple conveying units for transporting cardboard, with the last conveying unit capable of vertical movement relative to the frame. The tapping mechanism includes two opposing tapping plates located on either side of a third conveying unit and connected to the roller shaft of a third conveying roller for horizontal reciprocating motion. The limiting mechanism is located at the discharge end of the last conveying unit and includes a limiting plate mounted on a third support, positioned along the travel distance of the cardboard on the third conveyor belt. The limiting plate can also rotate relative to the frame. This design increases the maximum stacking thickness of the cardboard, reduces the number of transfers after stacking, and features high automation, high stability, low labor intensity, making it suitable for continuous cardboard stacking operations in factories.

[0004] While the aforementioned cases can stack and organize cartons layer by layer, they generally suffer from inherent problems such as collisions at the junctions, positioning misalignments, and surface damage. In traditional devices, cartons often collide directly horizontally during transport and stacking, easily leading to bumps, jamming, or even stack tipping due to asynchronous speeds, severely impacting stacking smoothness and reliability. Furthermore, their lifting mechanisms often employ direct pull-out or drop-down release, causing cartons to vibrate, tilt, or bounce upon release, making it difficult to guarantee interlayer alignment accuracy and resulting in poor stacking stability. In addition, traditional clamping mechanisms often use rigid baffles or fixed grippers, which can easily scratch the surface of cartons during clamping and handling, causing cosmetic damage, especially to beautifully printed packaging. During lifting, cartons often slide, rotate, or detach due to a lack of effective locking, causing the cartons' posture to gradually shift during stacking, ultimately resulting in a skewed and loose stack, affecting the stability of subsequent wrapping, handling, and storage. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a device for squaring stacked cartons, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cardboard box straightening device, comprising a conveying device, a stacking platform for placing cardboard boxes, a connecting plate connecting the conveying device and the stacking platform, a fixing platform fixed to the surface of the stacking platform, and an electric push rod fixed to the top of the fixing platform. One end of the connecting plate is fixedly connected to the inner wall of the conveying device, and the other end of the connecting plate is fixedly connected to the stacking platform. The output end of the electric push rod slides through the top of the fixing platform. The cardboard box straightening device further comprises: a lifting device disposed on the surface of the stacking platform for lifting cardboard boxes placed on the surface of the stacking platform, a pushing device disposed on the surface of the connecting plate for assisting in pushing the cardboard boxes to move, and a straightening device disposed on the surface of the stacking platform for straightening the cardboard boxes. The lifting device includes a lifting plate that slides on the inner wall of the stacking platform, a sliding plate that slides on the inner wall of the lifting plate, a push block that is fixed on the surface of the sliding plate, and a push rod that rotates on the surface of the fixed platform. The surface of the stacking platform is provided with a sliding groove, the lifting plate slides on the inner wall of the sliding groove, and the outer wall of the lifting plate is provided with a square groove, and the push block contacts the square groove.

[0007] The lifting device also includes a pressing plate that slides on the surface of the sliding plate, a roller that rotates on the inner wall of the pressing plate, a key that slides and is embedded in the inner wall of the sliding plate, a slide rod that slides on the inner wall of the sliding plate, and a stop block fixed to the bottom of the push rod. The pressing plate has a slot on the side near the key, the key matches the slot, and the key is fixedly connected to the slide rod. By lifting the sliding plate, the previous carton is temporarily lifted, creating a height difference in the vertical direction with the next carton being conveyed. Furthermore, by interfering with the inclined surface of the push rod and the push block, the sliding plate is forced to actively retract horizontally. This effectively avoids direct surface-to-surface collisions between the two cartons at the conveying junction due to asynchronous horizontal speeds.

[0008] An elastic element is provided between the extrusion plate and the sliding plate to push the extrusion plate into contact with the carton. An elastic element is also provided between the first slide rod and the sliding plate to push the sliding plate away from the stacking platform. The bottom of the push block is sloped to facilitate the movement of the push block by the first push rod. A torsion spring is provided between the first push rod and the fixed platform to reset the push rod. An elastic element is provided between the lifting plate and the sliding plate to reset the sliding plate. The bottom of the first slide rod is sloped so that the stacking platform pushes the slide rod back to its original position when the lifting plate resets. The pushing device includes a sliding frame that slides on the surface of a fixed platform, a rotating ring that rotates on the outer wall of a connecting plate, a connecting rod that connects the sliding frame and the rotating ring, a rotating rod that rotates through the inner wall of the connecting plate, and a push rod that is fixed to the surface of the rotating rod. The sliding frame is fixedly connected to a lifting plate. A placement groove is provided on the surface of the connecting plate. The rotating rod contacts the inner wall of the placement groove. One end of the rotating rod rotates through the connecting plate, and the other end of the rotating rod is fixedly connected to the push rod. The rotating ring is fixedly connected to the rotating rod. One end of the connecting rod is rotatably connected to the rotating ring, and the other end of the connecting rod is rotatably connected to the sliding frame. The push rod is initially located in the placement groove. Then, by rotating the rotating ring, the push rod is lifted from the groove, ensuring that the push rod will not scrape or collide with the bottom of the conveying carton before starting horizontal movement, thus ensuring smooth operation and the safety of the mechanism.

[0009] The pushing device also includes a baffle that rotates on the inner wall of the connecting plate, a second rotating ring that rotates on the outer wall of the connecting plate, and a second connecting rod that connects the second rotating ring and the first rotating ring. The rotating shaft of the baffle rotates through the inner wall of the connecting plate. The second rotating ring is fixedly connected to the baffle. One end of the second connecting rod is rotatably connected to the second rotating ring, and the other end of the second connecting rod is rotatably connected to the first rotating ring. When the second pushing rod moves, the baffle is lifted, physically blocking subsequent cartons from entering the connecting plate. This ensures that there is only one carton on the connecting plate, avoiding the squeezing and disorder caused by multiple cartons rushing in at the same time.

[0010] The connecting plate has a sliding groove on its surface, the rotating rod contacts the inner wall of the sliding groove, and the second push rod contacts the inner wall of the placement groove.

[0011] The alignment device includes a second sliding rod that slides on the surface of the stacking platform, a connecting rod connecting the second sliding rod to the sliding frame, a round rod that slides on the inner wall of the second sliding rod, and a push plate that is fixedly connected to the round rod. One end of the connecting rod is rotatably connected to the second sliding rod, and the other end of the connecting rod is rotatably connected to the sliding frame. The round rod slides through the inner wall of the second sliding rod.

[0012] The straightening device further includes a sliding frame that slides on the inner wall of the stacking platform, a connecting rod three connecting the sliding frame and the sliding rod two, a sliding plate that slides on the inner wall of the sliding frame, and a fixing block fixed to the inner wall of the stacking platform. The surface of the stacking platform is provided with a sliding groove, the sliding frame slides on the inner wall of the sliding groove, one end of the connecting rod three is rotatably connected to the sliding frame, and the other end of the connecting rod three is rotatably connected to the sliding rod two. The fixing block is fixed to the inner wall of the sliding groove. The carton can be pushed to the center position of the stacking platform by the push plate and the sliding plate, so that the carton will be in the center position of the stacking platform when stacked.

[0013] An elastic element is provided between the round rod and the second sliding rod. The elastic element between the round rod and the second sliding rod is provided to facilitate the movement of the round rod toward the carton. An elastic element is provided between the sliding plate and the sliding frame. The elastic element between the sliding plate and the sliding frame is provided to drive the sliding plate to reset. The side of the fixed block near the sliding plate is set as an inclined surface, and the bottom of the sliding plate near the fixed block is set as an arc surface.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, the lifting action of the sliding plate temporarily lifts the previous carton, creating a height difference in the vertical direction with the next carton being transported. Furthermore, the interference of the push rod and the inclined surface of the push block forces the sliding plate to actively retract horizontally. This effectively avoids direct surface-to-surface collisions between the two cartons at the transport junction due to asynchronous horizontal speeds, ensuring smooth and highly reliable stacking. This method also makes the release of the carton more stable, reducing vibration, tilting, or jumping caused by the rapid descent or removal of the pallet, further ensuring stacking stability. The rollers are designed so that when the device descends to clamp the carton, the rollers can use rolling friction instead of sliding friction to easily conform to the side of the carton, effectively preventing the hard clamp from scratching or abrading the carton surface. The locking button automatically inserts into the squeezing plate, locking the squeezing plate in a clamped state, preventing the carton from sliding, rotating, or falling off during the lifting process, ensuring that the carton's posture remains consistent with that during each lifting.

[0015] 2. In this invention, the push rod two is initially located in the placement slot. Then, through the rotation of the rotating ring one, the push rod two is lifted from the slot, ensuring that the push rod two will not scrape or collide with the bottom of the conveyed carton before it begins horizontal movement. This ensures smooth operation and the safety of the mechanism. The auxiliary push of the push rod two ensures that the carton arrives at the predetermined position on the stacking platform completely and accurately, solving the problem of inaccurate stacking position caused by power attenuation. The baffle is lifted when the push rod two moves, physically blocking subsequent cartons from entering the connecting plate. This ensures that there is only one carton on the connecting plate, avoiding the squeezing and disorder caused by multiple cartons rushing in at the same time, and fundamentally eliminating the risk of jamming, misalignment or equipment damage caused by congestion.

[0016] 3. In this invention, the pusher and slide plate can push the carton to the center of the stacking platform, so that the carton will be in the center of the stacking platform when stacked. By moving the pusher and slide plate simultaneously, the carton that may be misaligned is actively pushed and corrected to the predetermined center position of the stacking platform. This ensures that each stacked carton has a uniform and accurate reference position, thereby directly guaranteeing the squareness and verticality of the final stack shape. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the position structure of the lifting plate and sliding plate of the present invention; Figure 3 This is a schematic diagram of the position and structure of the extrusion plate and rollers of the present invention; Figure 4 This is a schematic diagram of the position structure of the slide bar and the round bar of the present invention; Figure 5 This is a schematic diagram of the two-position structure of the rotating rod and push rod of the present invention; Figure 6 This is a schematic diagram of the position structure of the round rod and push plate of the present invention; Figure 7 This is a schematic diagram of the position and structure of the sliding frame and sliding plate of the present invention.

[0018] The meanings of the labels in the diagram are as follows: 1. Conveying device; 2. Stacking platform; 3. Connecting plate; 4. Fixed platform; 5. Electric push rod; 6. Lifting plate; 7. Sliding plate; 8. Extrusion plate; 9. Roller; 10. Locking key; 11. Push rod one; 12. Slide rod one; 13. Block; 14. Push block; 21. Sliding frame; 22. Connecting rod one; 23. Rotary ring one; 24. Rotating rod; 25. Push rod two; 26. Connecting rod two; 27. Rotary ring two; 28. Baffle; 31. Connecting rod; 32. Slide rod two; 33. Round rod; 34. Push plate; 35. Connecting rod three; 36. Sliding frame; 37. Sliding plate; 38. Fixed block. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-7 One embodiment of the present invention is: a stacking carton straightening device, including a conveying device 1, a stacking platform 2 for placing cartons, a connecting plate 3 connecting the conveying device 1 and the stacking platform 2, a fixing platform 4 fixed to the surface of the stacking platform 2, and an electric push rod 5 fixed to the top of the fixing platform 4. One end of the connecting plate 3 is fixedly connected to the inner wall of the conveying device 1, and the other end of the connecting plate 3 is fixedly connected to the stacking platform 2. The output end of the electric push rod 5 slides through the top of the fixing platform 4. The stacking carton straightening device also includes: a lifting device disposed on the surface of the stacking platform 2 for lifting the cartons placed on the surface of the stacking platform 2, a pushing device disposed on the surface of the connecting plate 3 for assisting in pushing the cartons to move, and a straightening device disposed on the surface of the stacking platform 2 for straightening the cartons. The lifting device includes a lifting plate 6 that slides on the inner wall of the stacking platform 2, a sliding plate 7 that slides on the inner wall of the lifting plate 6, a pusher 14 that is fixed on the surface of the sliding plate 7, and a pusher 11 that rotates on the surface of the fixed platform 4. A sliding groove is provided on the surface of the stacking platform 2, the lifting plate 6 slides on the inner wall of the sliding groove, and a square groove is provided on the outer wall of the lifting plate 6, and the pusher 14 contacts the square groove.

[0021] The lifting device also includes a pressing plate 8 that slides on the surface of the sliding plate 7, a roller 9 that rotates on the inner wall of the pressing plate 8, a locking key 10 that slides and is embedded in the inner wall of the sliding plate 7, a slide rod 12 that slides on the inner wall of the sliding plate 7, and a stop block 13 that is fixed to the bottom of the push rod 11. The pressing plate 8 has a slot on the side near the locking key 10, the locking key 10 matches the slot, and the locking key 10 is fixedly connected to the slide rod 12.

[0022] An elastic element is provided between the extrusion plate 8 and the sliding plate 7. The elastic element between the extrusion plate 8 and the sliding plate 7 is used to push the extrusion plate 8 into contact with the carton. An elastic element is also provided between the slide rod 12 and the sliding plate 7. The elastic element between the slide rod 12 and the sliding plate 7 is used to push the sliding plate 7 away from the stacking platform 2. The bottom of the push block 14 is set with an inclined surface. The inclined surface of the push block 14 is used to facilitate the push rod 11 to push the push block 14 to move. A torsion spring is provided between the push rod 11 and the fixed platform 4. The torsion spring of the push rod 11 is used to drive the push rod 11 to reset. An elastic element is provided between the lifting plate 6 and the sliding plate 7. The elastic element between the lifting plate 6 and the sliding plate 7 is used to drive the sliding plate 7 to reset. The bottom of the slide rod 12 is set with an inclined surface. The inclined surface of the slide rod 12 is used to push the slide rod 12 to reset when the lifting plate 6 resets.

[0023] In this embodiment, when cardboard boxes need to be stacked, the conveyor 1 transports the boxes to the surface of the stacking platform 2. When the boxes reach the surface of the connecting plate 3, the electric push rod 5 is activated. The electric push rod 5 pulls the lifting plate 6 upward, which in turn moves the sliding plate 7. The sliding plate 7 then contacts the bottom of the boxes, lifting them upward and allowing them to be stacked one by one. The sliding plate 7 then contacts the push rod 11, which in turn rotates the push rod 11 upward. When the boxes slide onto the surface of the stacking platform 2, the electric push rod 5 pushes the lifting plate 6 back to its original position. The lifting plate 6 then moves the sliding plate 7 back to its original position. During movement, the sliding plate 7 drives the push block 14 downward. The movement of the push block 14 causes the push rod 11 to contact the inclined surface of the push block 14, which in turn presses the push rod 11 downward. The downward rotation of the push rod 11 is blocked by the stop block 13, preventing it from rotating downward. The push rod 11 then pushes the push block 14, which in turn pushes the sliding plate 7 towards the inside of the lifting plate 6. This movement causes the sliding plate 7 to contact the lifting mechanism of the cardboard box, causing the previously lifted cardboard box to stack on top of the subsequent cardboard boxes. As the sliding plate 7 moves downward, it drives the pressing plate 8 to move. The movement of the pressing plate 8 drives the roller 9 to move, and the elastic element pushes the pressing plate 8 towards the cardboard box. The pressing plate 8 then pushes the roller 9. The cardboard box is clamped. When the squeezing plate 8 moves the roller 9 downward, the roller 9 rotates in contact with the surface of the cardboard box to avoid damage to the exterior. When the sliding plate 7 moves the squeezing plate 8 upward, the sliding plate 7 moves the sliding rod 12. The sliding rod 12 disengages from the stacking table 2 and moves away from the sliding plate 7. The movement of the sliding rod 12 moves the locking key 10, which inserts into the squeezing plate 8 to limit its movement. This ensures that the squeezing plate 8 fixes the cardboard box when the sliding plate 7 moves it upward, preventing the box from shifting during the lifting process. The lifting action of the sliding plate 7 temporarily lifts the previous cardboard box, aligning it vertically with the next cardboard box being transported. A height difference is created in the direction, and the inclined interference between push rod 11 and push block 14 forces sliding plate 7 to actively retract horizontally. This effectively avoids direct surface-to-surface collision between two cartons at the conveyor junction due to asynchronous horizontal speeds, ensuring smooth and highly reliable stacking. Furthermore, this method makes the release of cartons smoother, reducing vibration, tilting, or jumping caused by rapid descent or removal of the pallet, further ensuring stacking stability. The roller 9 is designed so that when the device descends to clamp the cartons, it can use rolling friction instead of sliding friction to easily conform to the sides of the cartons, effectively preventing scratches or wear on the carton surface from hard clamps. Locking key 10 automatically inserts into the squeezing plate 8, locking it in the clamped state.This prevents the cardboard box from sliding sideways, rotating, or falling off during the lifting process, ensuring that the box's posture remains consistent with when it was picked up each time it is lifted.

[0024] Please see Figures 1-7 Based on the above embodiments, in another embodiment of the present invention, a stacking carton straightening device further includes a pushing device and a straightening device.

[0025] The pushing device includes a sliding frame 21 that slides on the surface of the fixed platform 4, a rotating ring 23 that rotates on the outer wall of the connecting plate 3, a connecting rod 22 that connects the sliding frame 21 and the rotating ring 23, a rotating rod 24 that rotates through the inner wall of the connecting plate 3, and a push rod 25 that is fixed on the surface of the rotating rod 24. The sliding frame 21 is fixedly connected to the lifting plate 6. A placement groove is provided on the surface of the connecting plate 3. The rotating rod 24 contacts the inner wall of the placement groove. One end of the rotating rod 24 rotates through the connecting plate 3, and the other end of the rotating rod 24 is fixedly connected to the push rod 25. The rotating ring 23 is fixedly connected to the rotating rod 24. One end of the connecting rod 22 is rotatably connected to the rotating ring 23, and the other end of the connecting rod 22 is rotatably connected to the sliding frame 21.

[0026] The driving device also includes a baffle 28 that rotates on the inner wall of the connecting plate 3, a rotating ring 27 that rotates on the outer wall of the connecting plate 3, and a connecting rod 26 that connects the rotating ring 27 and the rotating ring 23. The rotating shaft of the baffle 28 rotates through the inner wall of the connecting plate 3. The rotating ring 27 is fixedly connected to the baffle 28. One end of the connecting rod 26 is rotatably connected to the rotating ring 27, and the other end of the connecting rod 26 is rotatably connected to the rotating ring 23.

[0027] The surface of the connecting plate 3 is provided with a sliding groove, the rotating rod 24 contacts the inner wall of the sliding groove, and the push rod 25 contacts the inner wall of the placement groove.

[0028] The alignment device includes a slide bar 32 that slides on the surface of the stacking platform 2, a connecting rod 31 that connects the slide bar 32 and the sliding frame 21, a round rod 33 that slides on the inner wall of the slide bar 32, and a push plate 34 that is fixedly connected to the round rod 33. One end of the connecting rod 31 is rotatably connected to the slide bar 32, and the other end of the connecting rod 31 is rotatably connected to the sliding frame 21. The round rod 33 slides through the inner wall of the slide bar 32.

[0029] The alignment device also includes a sliding frame 36 that slides on the inner wall of the stacking platform 2, a connecting rod 35 that connects the sliding frame 36 and the second slide rod 32, a sliding plate 37 that slides on the inner wall of the sliding frame 36, and a fixing block 38 that is fixed on the inner wall of the stacking platform 2. A sliding groove is provided on the surface of the stacking platform 2. The sliding frame 36 slides on the inner wall of the sliding groove. One end of the connecting rod 35 is rotatably connected to the sliding frame 36, and the other end of the connecting rod 35 is rotatably connected to the second slide rod 32. The fixing block 38 is fixed on the inner wall of the sliding groove.

[0030] An elastic element is provided between the round rod 33 and the slide rod 32. The elastic element between the round rod 33 and the slide rod 32 is provided to facilitate the movement of the round rod 33 toward the carton. An elastic element is provided between the sliding plate 37 and the sliding frame 36. The elastic element between the sliding plate 37 and the sliding frame 36 is provided to drive the sliding plate 37 to reset. The side of the fixing block 38 near the sliding plate 37 is set as an inclined surface, and the bottom of the sliding plate 37 near the fixing block 38 is set as an arc surface.

[0031] In this embodiment, during operation: when the lifting plate 6 moves upward, it drives the sliding frame 21 to move. The movement of the sliding frame 21 pulls the connecting rod 22 upward. The upward movement of the connecting rod 22 first pulls the rotating ring 23 to rotate. The rotation of the rotating ring 23 drives the rotating rod 24 to rotate. The rotation of the rotating rod 24 drives the push rod 25 to disengage from the placement slot. As the sliding frame 21 continues to move upward, the connecting rod 22 will pull the rotating ring 23 towards the stacking platform 2 after the rotating ring 23 has finished rotating. The movement of the rotating ring 23 will drive the rotating rod 24 to move. The movement of the rotating rod 24 will drive the push rod 25 to move. The movement of the push rod 25 will assist in pushing the carton on the surface of the connecting plate 3 towards the stacking platform 2. When the rotating ring 23 moves, it pulls the connecting rod 26 to move. The movement of the connecting rod 26 will pull the rotating ring 27 to rotate. The rotation of the rotating ring 27 will drive the baffle 28 to rotate. The rotation of plate 28 will block the subsequent cartons, preventing too many cartons from being placed on the surface of connecting plate 3 at once. The push rod 25 is initially located in the placement slot. Then, through the rotation of the rotating ring 23, the push rod 25 is lifted out of the slot, ensuring that the push rod 25 will not scrape or collide with the bottom of the conveying cartons before starting horizontal movement, thus ensuring smooth operation and the safety of the mechanism. The auxiliary push of the push rod 25 ensures that the cartons reach the predetermined position on the stacking table 2 completely and accurately, solving the problem of inaccurate stacking position caused by power attenuation. The baffle 28 is lifted when the push rod 25 moves, physically blocking the subsequent cartons from entering the connecting plate 3. This ensures that there is only one carton on the connecting plate 3, avoiding the squeezing and disorder caused by multiple cartons rushing in at the same time, and fundamentally eliminating the risk of jamming, misalignment or equipment damage caused by congestion.

[0032] When the sliding frame 21 moves upward, it pulls the connecting rod 31 to move. The movement of the connecting rod 31 pulls the second sliding rod 32 to move towards the lifting plate 6. The movement of the second sliding rod 32 pulls the round rod 33 to move. The movement of the round rod 33 pulls the push plate 34 to move. When the second sliding rod 32 moves, it pulls the third connecting rod 35 to move. The movement of the third connecting rod 35 pulls the sliding frame 36 to move away from the connecting plate 3. The movement of the sliding frame 36 drives the sliding plate 37 to move. The movement of the sliding plate 37 will cause the sliding plate 37 to contact the inclined surface of the fixed block 38. Then, the sliding plate 37 will be pushed by the fixed block 38 to move away from the sliding frame 36. When the sliding plate 37 protrudes, the sliding frame 36 drives the sliding plate 37 to move, which will push the carton to the center position. When the sliding frame 21 moves downward, it will push... When the connecting rod 31 moves, it pushes the slide bar 32 to move, which in turn pushes the round rod 33 to move. The round rod 33 then pushes the push plate 34 to contact the carton, causing the push plate 34 to move towards the center. After the push plate 34 presses the carton, it receives a reaction force and moves closer to the slide bar 32. Through the push plate 34 and the sliding plate 37, the carton can be pushed to the center of the stacking platform 2, ensuring that the carton is in the center of the stacking platform 2 during stacking. By moving the push plate 34 and the sliding plate 37 simultaneously, the carton that may be misaligned is actively pushed and corrected to the predetermined center position of the stacking platform 2. This ensures that each stacked carton has a uniform and accurate reference position, thereby directly guaranteeing the squareness and verticality of the final stack.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cardboard box square-forming device, comprising a conveying device (1), a stacking platform (2) for placing cardboard boxes, a connecting plate (3) connecting the conveying device (1) and the stacking platform (2), a fixing platform (4) fixed to the surface of the stacking platform (2), and an electric push rod (5) fixed to the top of the fixing platform (4), wherein one end of the connecting plate (3) is fixedly connected to the inner wall of the conveying device (1), and the other end of the connecting plate (3) is fixedly connected to the stacking platform (2), and the output end of the electric push rod (5) slides through the top of the fixing platform (4), characterized in that, The stacking carton straightening device further includes: a lifting device disposed on the surface of the stacking platform (2) for lifting the carton placed on the surface of the stacking platform (2); a pushing device disposed on the surface of the connecting plate (3) for assisting in pushing the carton to move; and a straightening device disposed on the surface of the stacking platform (2) for straightening the carton. The lifting device includes a lifting plate (6) that slides on the inner wall of the stacking platform (2), a sliding plate (7) that slides on the inner wall of the lifting plate (6), a pusher (14) that is fixed on the surface of the sliding plate (7), and a pusher (11) that rotates on the surface of the fixed platform (4). The surface of the stacking platform (2) is provided with a sliding groove, the lifting plate (6) slides on the inner wall of the sliding groove, the outer wall of the lifting plate (6) is provided with a square groove, and the pusher (14) contacts the square groove.

2. The stacking carton squarening device according to claim 1, characterized in that: The lifting device also includes a pressing plate (8) that slides on the surface of the sliding plate (7), a roller (9) that rotates on the inner wall of the pressing plate (8), a key (10) that slides and is embedded in the inner wall of the sliding plate (7), a slide rod (12) that slides on the inner wall of the sliding plate (7), and a stop block (13) that is fixed to the bottom of the push rod (11). The pressing plate (8) has a slot on the side near the key (10), the key (10) matches the slot, and the key (10) is fixedly connected to the slide rod (12).

3. The stacking carton squarening device according to claim 2, characterized in that: An elastic element is provided between the extrusion plate (8) and the sliding plate (7), an elastic element is provided between the slide rod (12) and the sliding plate (7), the bottom of the push block (14) is set as an inclined surface, a torsion spring is provided between the push rod (11) and the fixed platform (4), an elastic element is provided between the lifting plate (6) and the sliding plate (7), and the bottom of the slide rod (12) is set as an inclined surface.

4. The stacking carton squarening device according to claim 1, characterized in that: The pushing device includes a sliding frame (21) that slides on the surface of the fixed platform (4), a rotating ring (23) that rotates on the outer wall of the connecting plate (3), a connecting rod (22) that connects the sliding frame (21) and the rotating ring (23), a rotating rod (24) that rotates through the inner wall of the connecting plate (3), and a push rod (25) that is fixed on the surface of the rotating rod (24). The sliding frame (21) is fixedly connected to the lifting plate (6). The surface of the connecting plate (3) is provided with a placement groove. The rotating rod (24) contacts the inner wall of the placement groove. One end of the rotating rod (24) rotates through the connecting plate (3). The other end of the rotating rod (24) is fixedly connected to the push rod (25). The rotating ring (23) is fixedly connected to the rotating rod (24). One end of the connecting rod (22) is rotatably connected to the rotating ring (23). The other end of the connecting rod (22) is rotatably connected to the sliding frame (21).

5. The stacking carton squarening device according to claim 4, characterized in that: The pushing device also includes a baffle (28) that rotates on the inner wall of the connecting plate (3), a rotating ring two (27) that rotates on the outer wall of the connecting plate (3), and a connecting rod two (26) that connects the rotating ring two (27) and the rotating ring one (23). The rotating shaft of the baffle (28) rotates through the inner wall of the connecting plate (3). The rotating ring two (27) is fixedly connected to the baffle (28). One end of the connecting rod two (26) is rotatably connected to the rotating ring two (27), and the other end of the connecting rod two (26) is rotatably connected to the rotating ring one (23).

6. The stacking carton squarening device according to claim 5, characterized in that: The connecting plate (3) has a sliding groove on its surface, the rotating rod (24) is in contact with the inner wall of the sliding groove, and the push rod (25) is in contact with the inner wall of the placement groove.

7. The stacking carton squarening device according to claim 4, characterized in that: The alignment device includes a slide rod 2 (32) that slides on the surface of the stacking platform (2), a connecting rod (31) that connects the slide rod 2 (32) and the sliding frame (21), a round rod (33) that slides on the inner wall of the slide rod 2 (32), and a push plate (34) that is fixedly connected to the round rod (33). One end of the connecting rod (31) is rotatably connected to the slide rod 2 (32), and the other end of the connecting rod (31) is rotatably connected to the sliding frame (21). The round rod (33) slides through the inner wall of the slide rod 2 (32).

8. The stacking carton squarening device according to claim 7, characterized in that: The alignment device further includes a sliding frame (36) that slides on the inner wall of the stacking platform (2), a connecting rod (35) that connects the sliding frame (36) and the second sliding rod (32), a sliding plate (37) that slides on the inner wall of the sliding frame (36), and a fixing block (38) that is fixed on the inner wall of the stacking platform (2). The surface of the stacking platform (2) is provided with a sliding groove. The sliding frame (36) slides on the inner wall of the sliding groove. One end of the connecting rod (35) is rotatably connected to the sliding frame (36), and the other end of the connecting rod (35) is rotatably connected to the second sliding rod (32). The fixing block (38) is fixed on the inner wall of the sliding groove.

9. The stacking carton squarening device according to claim 8, characterized in that: An elastic element is provided between the round rod (33) and the slide rod (32), and an elastic element is provided between the sliding plate (37) and the sliding frame (36). The side of the fixed block (38) near the sliding plate (37) is set as an inclined surface, and the bottom of the sliding plate (37) near the fixed block (38) is set as an arc surface.

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