A sealing device and sealing method for a carton packaging machine

Abstract

This invention relates to the technical field of cardboard packaging, and in particular to a sealing device and method for a cardboard packaging machine. The device includes a frame on which a conveying mechanism is mounted, comprising a conveyor belt and a guiding assembly. The conveyor belt is mounted on the frame and driven by a motor. The guiding assembly includes a set of guide rods mounted above the conveyor belt and a width adjustment assembly. The axis of the guide rods is parallel to the conveying direction of the conveyor belt. The width adjustment assembly includes a rotating rod mounted on the frame. The rotating rod has two threaded portions with opposite thread directions. Each threaded portion is threaded with a sliding block, and the sliding blocks are connected to the guide rods in a one-to-one correspondence. This invention can cover the packaging needs of cardboard boxes of different widths and heights without requiring component replacement, significantly improving the equipment's versatility.

Description

Technical Field

[0001] This invention relates to the technical field of cardboard packaging, and in particular to a sealing device and sealing method for a cardboard packaging machine. Background Technology

[0002] With the rapid development of e-commerce, logistics and express delivery, and manufacturing, the demand for cardboard boxes, as one of the most common and economical packaging forms, has exploded. Highly efficient automated packaging equipment, especially integrated production lines that combine cardboard box forming, filling, and sealing, has become a key element in modern warehousing and logistics, enabling improvements in efficiency, cost reduction, and quality assurance. Among these processes, sealing, as the final step in the packaging workflow, directly impacts the overall packaging speed and product image through its efficiency, stability, and aesthetics.

[0003] Currently, the core structure of the automatic carton sealing devices commonly used in carton packaging machines typically includes a frame, a conveyor belt, and a tape sealing system. The frame provides overall support and a mounting base, the conveyor belt drives the carton through the sealing area, and the tape sealing system performs the sealing operation. However, existing sealing devices are not adaptable to carton types. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, one of the objectives of this invention is to provide a sealing device and sealing method for a carton packaging machine that can adapt to various sizes of cartons.

[0005] The above-mentioned objective of this invention is achieved through the following technical solutions:

[0006] A carton sealing device for a carton packaging machine includes a frame on which a;

[0007] A conveying mechanism includes a conveyor belt and a guiding assembly. The conveyor belt is mounted on a frame and driven by a motor. The guiding assembly includes a set of guide rods mounted above the conveyor belt and a width adjustment assembly. The axis of the guide rods is parallel to the conveying direction of the conveyor belt.

[0008] The width adjustment assembly includes a rotating rod mounted on the frame. The rotating rod has two threaded portions with opposite thread directions. Each threaded portion is threaded with a sliding block, and the sliding block is connected to the guide rod in a one-to-one correspondence.

[0009] The guiding assembly further includes a transverse rod mounted on the frame and a guide wheel assembly slidably connected to the transverse rod. The guide wheel assembly includes two guide wheel components slidably connected to the transverse rod, and guide wheels are mounted on the guide wheel components.

[0010] A linkage assembly is installed between the guide wheel assembly and the guide rod. The linkage assembly includes a lower linkage rod installed on the upper end of the guide rod and an upper linkage rod installed below the guide wheel assembly. The upper linkage rod is slidably connected to a sleeve, and the sleeve is sleeved with the lower linkage rod.

[0011] As a further embodiment of the sealing device for a carton packaging machine disclosed in this invention, the width adjustment component further includes a sprocket assembly mounted on the frame. The sprocket assembly is linked by a chain and includes a drive wheel and a driven wheel. The drive wheel is synchronously connected to a rotating handle, and the driven wheel is synchronously connected to the rotating rod.

[0012] As a further embodiment of the sealing device for a carton packaging machine disclosed in this invention, the guide wheel component further includes a sliding frame, the sliding frame including a sliding tube passing through the transverse rod, a connecting pipe fixedly connected to the lower end of the sliding tube, a mounting plate fixedly connected to the lower end of the connecting pipe, and the guide wheel mounted on the mounting plate.

[0013] As a further embodiment of the sealing device for a carton packaging machine disclosed in this invention, the guide wheel component further includes a locking shell sleeved on the sliding frame, a locking post that passes through the locking shell is fixedly connected to the sliding frame, the locking post is threadedly connected to a rotating handwheel, and the two sides of the locking shell abut against the rotating handwheel and the transverse rod.

[0014] As a further embodiment of the sealing device for a carton packaging machine disclosed in this invention, the side wall of the linkage rod is provided with a limiting protrusion, and the sleeve is correspondingly provided with a limiting groove.

[0015] As a further embodiment of the sealing device for a carton packaging machine disclosed in this invention, it also includes a height adjustment component. The height adjustment component includes two vertical guide tubes installed on both sides of the frame. A threaded rod is rotatably connected inside one of the guide tubes, and a sliding rod is installed inside the other guide tube. A mounting bracket is provided between the two guide tubes. A threaded sleeve is installed on the side of the mounting bracket facing the threaded rod. The threaded sleeve is threadedly connected to the threaded rod. The other side of the mounting bracket is slidably connected to the sliding rod.

[0016] As a further embodiment of the sealing device for a carton packaging machine disclosed in this invention, a pressure roller assembly is provided between the conveyor belts. The pressure roller assembly includes a support frame, a front sealing roller, and a rear sealing roller. The front sealing roller and the rear sealing roller are rotatably mounted on the support frame. The front sealing roller is rotatably connected to the support frame through a front rotating rod, and the rear sealing roller is rotatably connected to the support frame through a rear rotating rod. A synchronization component is installed between the front sealing roller and the rear sealing roller.

[0017] This invention also discloses a method for sealing cardboard boxes, using the aforementioned sealing device, including:

[0018] S1, Size Pre-adjustment Stage;

[0019] The spacing is adjusted to the carton width by adjusting the guide rods using the width adjustment component, and the height of the guide wheel assembly is matched to the carton thickness by adjusting the height of the height adjustment component.

[0020] S2, Carton transfer stage;

[0021] Start the conveyor belt motor and place the open carton at the conveyor belt inlet;

[0022] S3, pressing and sealing stage;

[0023] The box is sealed using a pressure roller assembly and tape wrapped around it.

[0024] In summary, the present invention has at least one of the following beneficial technical effects:

[0025] 1. The sliding cylinder is driven by a rotating rod with opposite thread direction, which realizes stepless and precise adjustment of the guide rod spacing. Combined with the lifting function of the height adjustment component, it can cover the packaging needs of cartons with different widths and heights without replacing parts, greatly improving the versatility of the equipment.

[0026] 2. The synchronizing rod and rotating column make the front and rear applicator rollers kinematically coupled. When the front applicator roller is displaced by the box cover, the rear applicator roller is forced to press down through the fulcrum of the synchronizing rod. Combined with the energy storage and release characteristics of the return spring, it can automatically adapt to the height difference between the front and rear cover plates, ensuring that the uneven box cover is compacted synchronously.

[0027] 3. The guide rod and guide wheel assembly adopt a linkage design, which can separate their individual displacements or move synchronously, thus adapting to regular and irregular shaped cartons, while ensuring accuracy during synchronous displacement. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of one embodiment of a sealing device for a carton packaging machine disclosed in this invention;

[0029] Figure 2 This is a schematic diagram of the structure of a guide component in one embodiment of a sealing device for a carton packaging machine disclosed in this invention;

[0030] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0031] Figure 4 This is a schematic diagram of the width adjustment component of an embodiment of a sealing device for a carton packaging machine disclosed in this invention;

[0032] Figure 5 This is a schematic diagram of the guide rail structure of an embodiment of a sealing device for a carton packaging machine disclosed in this invention;

[0033] Figure 6 This is a schematic diagram of the height adjustment component of one embodiment of a sealing device for a carton packaging machine disclosed in this invention;

[0034] Figure 7 This is a schematic diagram of the pressure roller assembly of an embodiment of a sealing device for a carton packaging machine disclosed in this invention.

[0035] In the picture,

[0036] 1. Frame; 11. Body; 12. Support legs; 13. Casters;

[0037] 2. Conveying mechanism; 21. Conveyor belt; 22. Guiding assembly; 221. Guide rod; 2211. Inclined surface; 222. Guide wheel assembly; 223. Transverse rod; 224. Guide wheel component; 2241. Guide wheel; 2242. Sliding frame; 22421. Sliding tube; 2243. Connecting tube; 2244. Mounting plate; 2245. Locking housing; 2246. Locking pin; 2247. Rotating handwheel; 225. Linkage assembly; 2251. Lower linkage rod; 2252. Upper linkage rod; 2253. Sleeve; 2254. Limiting protrusion; 2255. Limiting groove;

[0038] 3. Width adjustment assembly; 31. Rotating rod; 311. Threaded part; 32. Sliding block; 321. Sliding column; 322. Limiting plate; 323. Sliding cylinder; 33. Guide rail; 34. Sprocket assembly; 341. Driving wheel; 342. Driven wheel; 343. Chain; 344. Rotating handle;

[0039] 4. Height adjustment assembly; 41. Guide tube; 42. Threaded rod; 43. Sliding rod; 44. Mounting bracket; 45. Threaded sleeve;

[0040] 5. Pressure roller assembly; 51. Support frame; 52. Front application roller; 53. Front rotating rod; 54. Rear application roller; 55. Rear rotating rod; 56. Synchronization assembly; 561. Synchronization rod; 562. Rotating column; 57. Reset component. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings.

[0042] Reference Figures 1-7 The present invention discloses a sealing device for a carton packaging machine, comprising a frame 1, on which a conveying mechanism 2, a width adjustment component 3, a height adjustment component 4, and a pressure roller component 5 are mounted.

[0043] The frame 1 constitutes the main support frame of the device, mainly including a frame body 11 and four support legs 12 fixedly connected to the bottom of the frame body 11. The frame body 11 serves as the core mounting base, used to support and fix the main functional components such as the conveying mechanism 2, width adjustment assembly 3, height adjustment assembly 4, and pressure roller assembly 5. The four support legs 12 provide a stable support foundation for the device, ensuring the rigidity and stability of the overall structure. It should be understood that, to enhance the mobility and convenience of the device, casters 13 can be selectively installed at the lower end of the support legs 12, preferably casters 13 with locking function, to facilitate the position adjustment and movement of the device on the production site.

[0044] The conveying mechanism 2 is responsible for transporting the cartons and is a key component for achieving continuous carton sealing operations. It mainly includes a conveyor belt 21 and a guide assembly 22. The conveyor belt 21 is mounted on the frame 11 and is driven by a motor to provide power for the cartons to move forward.

[0045] The guide assembly 22 ensures that the carton travels centered along a predetermined path during transport, preventing skewing. It includes a set of guide rods 221 mounted on both sides of the conveyor belt 21 with their axes parallel to the direction of travel of the conveyor belt 21. It should be emphasized that both ends of the guide rods 221 are provided with inclined surfaces 2211. The main function of these inclined surfaces 2211 is to allow the sides of the carton to smoothly and easily contact and slide along the inclined surfaces 2211 into the guide channel formed by the two guide rods 221 when it is fed into the conveyor belt area, effectively reducing jamming and impact, and ensuring smooth carton entry. The aforementioned width adjustment assembly 3 is directly connected to the guide rods 221 and is used to adjust the distance between the two guide rods 221 to accommodate cartons of different widths.

[0046] To meet specific application scenarios, such as the need to seal boxes from both the top and bottom simultaneously or to process boxes of special shapes, the conveyor belt 21 and its matching guide components 22 can be configured as two sets symmetrically distributed from top to bottom, acting on the bottom and top surfaces of the box respectively.

[0047] The width adjustment assembly 3 is used to adjust the spacing between the two guide rods 221 to accommodate the sealing requirements of cartons of different sizes. The width adjustment assembly 3 includes a rotating rod 31, which is rotatably mounted on the frame 11. The rotating rod 31 has two threaded sections 311 with opposite directions of rotation. Each threaded section 311 is threadedly connected to a sliding block 32, and each sliding block 32 is connected to one guide rod 221.

[0048] Specifically, but not limited, the sliding block 32 includes a sliding column 321, a limiting plate 322, and a sliding cylinder 323. The upper end of the sliding column 321 is fixedly connected to the corresponding guide rod 221, the limiting plate 322 is fixedly connected to the lower end of the sliding column 321, and the sliding cylinder 323 is fixedly connected to the lower end of the limiting plate 322. Its inner hole is provided with an internal thread that matches the threaded part 311 of the rotating rod 31 to realize threaded transmission.

[0049] The limiting plate 322 is abutted against guide rails 33 fixedly connected to the frame 11 on both sides, and is constrained between the guide rails 33 fixedly connected to the frame 11. It should be clearly understood that the guide rails 33 provide precise linear guidance, constraining the limiting plate 322 and its connected sliding cylinder 323 and guide rod 221 to slide only along the axial direction of the rotating rod 31; on the other hand, through the contact friction between the two sides of the limiting plate 322 and the guide rails 33, the torsional torque generated by the sliding cylinder 323 during the threaded transmission is effectively distributed, preventing the sliding cylinder 323 from jamming or deflecting due to uneven force, and ensuring a smooth and stable adjustment process.

[0050] The width adjustment assembly 3 also includes a sprocket assembly 34 mounted on the frame 1. The sprocket assembly 34 is linked by a chain 343. The sprocket assembly 34 includes a drive wheel 341 and a driven wheel 342. The drive wheel 341 is synchronously connected to a rotating handle 344, which provides manual operation input. The driven wheel 342 is synchronously connected to the rotating rod 31.

[0051] When it is necessary to adjust the width between the two guide rods 221, the operator rotates the rotating handle 344. The rotating handle 344 drives the driving wheel 341 to rotate, which in turn drives the driven wheel 342 to rotate synchronously via the chain 343, thereby causing the rotating rod 31 to rotate. Since the two threaded sections 311 on the rotating rod 31 rotate in opposite directions, when the rotating rod 31 rotates, the two threaded sliding cylinders 323 are constrained by the guide rail 33 and can only move linearly along the axis of the rotating rod 31, and their directions of movement are opposite. The movement of the sliding cylinders 323 is transmitted to the guide rods 221 through the limiting plate 322 and the sliding column 321, thereby allowing the two guide rods 221 to move closer or further apart, achieving the purpose of width adjustment.

[0052] The guide assembly 22 also includes a transverse rod 223 mounted on the frame 1 and a guide wheel assembly 222 slidably connected to the transverse rod 223. The guide wheel assembly 222 includes two independently slidable guide wheel members 224, each guide wheel member 224 being equipped with a guide wheel 2241 for guiding the carton to the side.

[0053] Specifically, but not limited to, the guide wheel component 224 also includes a sliding frame 2242, which includes a sliding tube 22421 that passes through the transverse rod 223. A connecting tube 2243 is fixedly connected to the lower end of the sliding tube 22421, and a mounting plate 2244 is fixedly connected to the lower end of the connecting tube 2243. The aforementioned guide wheel 2241 is rotatably mounted on the mounting plate 2244.

[0054] The guide wheel component 224 also includes a locking housing 2245 sleeved on the sliding frame 2242. A locking pin 2246 is fixedly connected to the sliding frame 2242, and the locking pin 2246 extends upward through the locking housing 2245. A rotating handwheel 2247 is threadedly connected to the locking pin 2246. It should be understood that when the rotating handwheel 2247 is tightened, the bottom of the rotating handwheel 2247 presses against the top surface of the locking housing 2245, and at the same time, the bottom surface of the locking housing 2245 is pressed against the top surface of the transverse rod 223. Through the frictional force generated by the forces at these three points, the guide wheel component 224 is locked in position on the transverse rod 223.

[0055] A linkage assembly 225 is installed between the guide wheel component 224 and the guide rod 221. The linkage assembly 225 includes a lower linkage rod 2251 fixedly installed at the upper end of the guide rod 221 and an upper linkage rod 2252 fixedly installed below the guide wheel component 224. A sleeve 2253 is slidably connected to the upper linkage rod 2252, and the lower end of the sleeve 2253 is sleeved with the lower linkage rod 2251.

[0056] The upper linkage rod 2252 has a rectangular cross-section limiting protrusion 2254 on its side wall, and the outer wall of the sleeve 2253 has a corresponding limiting groove 2255. This mating structure can smoothly transmit horizontal positional movement, that is, the width adjustment of the guide rod 221 drives the guide wheel 224 to adjust synchronously, and the upper linkage rod 2252 and the sleeve 2253 can slide freely up and down relative to each other. This allows the sleeve 2253 to be separated from the lower linkage rod 2251 when the vertical width of the carton is inconsistent.

[0057] The height adjustment assembly 4 is used to adjust the working height of the conveying mechanism 2, the width adjustment assembly 3, and the linked guide assembly 22, guide wheel assembly 222, etc., to accommodate cartons of different heights or to connect to production lines of different heights. The height adjustment assembly 4 includes two vertically arranged guide tubes 41 installed on both sides of the frame 1. The two guide tubes 41 are arranged in parallel. A threaded rod 42 is rotatably connected inside one guide tube 41, and a sliding rod 43 is fixedly installed or slidably installed inside the other guide tube 41. The sliding rod 43 mainly serves a guiding function. A mounting bracket 44 is provided between the two guide tubes 41. A threaded sleeve 45 is installed on the side of the mounting bracket 44 facing the threaded rod 42. The threaded sleeve 45 and the threaded rod 42 form a threaded engagement. The other side of the mounting bracket 44 is slidably connected to the sliding rod 43.

[0058] The threaded rod 42 can be driven to rotate via a handwheel, motor, or other means. Due to the meshing action between the threaded sleeve 45 and the threaded rod 42, and the fact that the mounting bracket 44 cannot rotate under the constraint of the sliding rod 43, the threaded sleeve 45, together with the entire mounting bracket 44, can only move along the axial direction of the threaded rod 42. The mating bearing housing between the sliding rod 43 and the mounting bracket 44 improves the smoothness of the movement process.

[0059] The pressure roller assembly 5 is positioned between the upper and lower conveyor belts 21 and is used to press, adhere, and pre-tighten the folds on both sides of the carton's top cover downwards, completing the sealing action. The pressure roller assembly 5 includes a support frame 51, a front pasting roller 52, and a rear pasting roller 54. Both the front pasting roller 52 and the rear pasting roller 54 are rotatably mounted on the support frame 51. The front pasting roller 52 is rotatably connected to the support frame 51 via a front rotating rod 53, and the rear pasting roller 54 is rotatably connected to the support frame 51 via a rear rotating rod 55. A synchronization component 56 is installed between the front pasting roller 52 and the rear pasting roller 54. The synchronization assembly 56 includes a synchronization rod 561 whose two ends are rotatably connected to the front rotating rod 53 and the rear rotating rod 55, respectively. A cylindrical rotating column 562 abuts against the middle of the synchronization rod 561. The rotating column 562 is rotatably mounted on the support frame 51, and its cylindrical surface remains in contact with the middle of the synchronization rod 561. The rotating column 562 not only serves as a support point for the synchronization rod 561 during its movement, but its rotational characteristics also effectively reduce the frictional resistance of the synchronization rod 561 during its movement. A reset member 57 is connected to the lower end of the front applicator roller 52.

[0060] It should be understood that, in order to ensure the synchronous rotation of the front coating roller 52 and the rear coating roller 54, one end of the synchronizing rod 561 is rotatably connected to the middle position of the front rotating rod 53, that is, between the rotation fulcrum of the front rotating rod 53 and the mounting point of the front coating roller 52. The other end of the synchronizing rod 561 is rotatably connected to the rear rotating rod 55, and this connection point is located below the rotation fulcrum of the rear rotating rod 55.

[0061] The reset element 57 is used to provide a force to reset the front applicator roller 52 after it has been pressed and rotated by the carton, and to maintain a certain initial pressure. The reset element 57 is preferably a spring such as a tension spring or a torsion spring. One end of the reset element 57 is fixedly connected to the lower end of the front rotating rod 53, and the other end is fixedly connected to the frame 11 or the support frame 51.

[0062] When a carton is conveyed to this station, it first contacts and lifts the front applicator roller 52, causing the front rotating rod 53 to rotate around its fulcrum. Through the linkage of the synchronizing rod 561, the movement of the front rotating rod 53 forcibly drives the rear rotating rod 55 to rotate downwards around its fulcrum, causing the rear applicator roller 54 to also contact the carton. The resetting member 57 is stretched, storing potential energy and providing continuous clamping force. After the carton passes, under the tension of the resetting member 57, the front applicator roller 52 resets and lifts, simultaneously driving the rear applicator roller 54 to reset and lift synchronously via the synchronizing rod 561, preparing for the next carton.

[0063] The present invention also discloses a method for sealing cardboard boxes, using the aforementioned sealing device, comprising:

[0064] S1, Size Pre-adjustment Stage;

[0065] The rotating handle 344 of the rotating width adjustment component drives the rotating rod 31 to rotate through the sprocket group 34, causing the two sliding cylinders 323 to move in opposite directions, thereby driving the guide rod 221 to synchronously adjust the spacing to the width of the carton.

[0066] Loosen the rotating handwheel 2247 of the guide wheel component 224, move the guide wheel assembly 222 laterally to directly below the guide rod 221, lock the rotating handwheel 2247 to achieve three-point locking, rotate the threaded rod 42 of the height adjustment component, drive the mounting bracket 44 to rise and fall along the guide tube 41, so that the height of the guide wheel assembly 222 matches the thickness of the carton.

[0067] S2, Carton transfer stage;

[0068] Start the motor of conveyor belt 21, place the open carton at the inlet of the conveyor belt, slide the side of the carton into the guide channel along the inclined surface 2211 of the guide rod 221, and enter the conveyor belt area with the top of the carton in contact with the guide wheel 2241.

[0069] S3, pressing and sealing stage;

[0070] The box is sealed using a pressure roller assembly and tape wrapped around it.

[0071] When the carton moves to the pressure roller assembly 5, the carton contacts the front bonding roller 52 and lifts the front rotating rod 53. At this time, the synchronizing rod 561 uses the rotating column 562 as the fulcrum to drive the rear rotating rod 55 to rotate, so that the rear bonding roller 54 is in contact with the carton. The resetting component 57 stretches and stores energy, so that the front bonding roller 52 and the rear bonding roller 54 maintain a constant bonding force. The two bonding rollers work together to roll the carton lid fold, completing the crease shaping and tape pre-compacting and bonding.

[0072] After the carton is separated from the pressure roller assembly, the reset component 57 pulls the front rotating rod 53 to reset, and the synchronizing rod 561 drives the rear sealing roller 54 to lift synchronously. The sealed carton is then conveyed out of the device via the conveyor belt 21.

[0073] The implementation principle of this embodiment is as follows: This device uses a motor-driven conveyor belt 21 to transport open cartons. The side walls of the cartons are guided to the center by the inclined surface 2211 of the guide rod 221, and the bottom is limited by the guide wheel assembly 222. When the cartons enter the pressure roller station, the front cover plate raises the front sealing roller 52, and the rear rotating rod 55 is linked by the synchronous rod 561 with the rotating column 562 as the fulcrum, so that the rear sealing roller 54 presses down on the carton cover synchronously; the reset component 57 provides constant pressure to complete the sealing. The width adjustment component 3 drives the guide rod 221 to slide bidirectionally to adapt to the width of the carton through the threaded part 311, and the height adjustment component 4 lifts the mounting frame 44 to match the thickness of the carton. Throughout the process, the linkage component 225 ensures that the guide wheels and the guide rod are vertically aligned, realizing continuous automated carton sealing.

[0074] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A carton sealing device for a carton packaging machine, comprising a frame (1), characterized in that: The frame (1) is equipped with; The conveying mechanism (2) includes a conveyor belt (21) and a guide assembly (22). The conveyor belt (21) is mounted on a frame (1) and driven by a motor. The guide assembly (22) includes a set of guide rods (221) mounted above the conveyor belt (21) and a width adjustment assembly (3). The axis of the guide rods (221) is parallel to the conveying direction of the conveyor belt (21). The width adjustment assembly (3) includes a rotating rod (31) mounted on the frame (1). The rotating rod (31) has two threaded portions (311) with opposite thread directions. Each threaded portion (311) is threaded with a sliding block (32). The sliding block (32) is connected to the guide rod (221) in a one-to-one correspondence. The guide assembly (22) further includes a transverse rod (223) mounted on the frame (1) and a guide wheel assembly (222) slidably connected to the transverse rod (223). The guide wheel assembly (222) includes two guide wheel members (224) slidably connected to the transverse rod (223), and guide wheels (2241) are mounted on the guide wheel members (224). A linkage assembly (225) is installed between the guide wheel assembly (222) and the guide rod (221). The linkage assembly (225) includes a lower linkage rod (2251) installed on the upper end of the guide rod (221) and an upper linkage rod (2252) installed below the guide wheel assembly (224). The upper linkage rod (2252) is slidably connected to a sleeve (2253). The sleeve (2253) is sleeved with the lower linkage rod (2251). When the upper and lower widths of the carton are inconsistent, the sleeve (2253) can be separated from the lower linkage rod (2251). The guide wheel component (224) further includes a sliding frame (2242), the sliding frame (2242) includes a sliding tube (22421) that passes through the transverse rod (223), the lower end of the sliding tube (22421) is fixedly connected to a connecting tube (2243), the lower end of the connecting tube (2243) is fixedly connected to a mounting plate (2244), and the guide wheel (2241) is mounted on the mounting plate (2244). The guide wheel component (224) also includes a locking shell (2245) sleeved on the sliding frame (2242). A locking pin (2246) is fixedly connected to the sliding frame (2242) and passes through the locking shell (2245). A rotating handwheel (2247) is threadedly connected to the locking pin (2246). The two sides of the locking shell (2245) abut against the rotating handwheel (2247) and the transverse rod (223).

2. The sealing device for a carton packaging machine according to claim 1, characterized in that: The width adjustment assembly (3) also includes a sprocket assembly (34) on the mounting frame (1). The sprocket assembly (34) is linked by a chain (343). The sprocket assembly (34) includes a drive wheel (341) and a driven wheel (342). The drive wheel (341) is synchronously connected to a rotating handle (344), and the driven wheel (342) is synchronously connected to the rotating rod (31).

3. The sealing device for a carton packaging machine according to claim 1, characterized in that: The side wall of the linkage rod (2252) is provided with a limiting protrusion (2254), and the sleeve (2253) is correspondingly provided with a limiting groove (2255).

4. A carton sealing device for a carton packaging machine according to claim 1, characterized in that: It also includes a height adjustment assembly (4), which includes two vertical guide tubes (41) installed on both sides of the frame (1). One of the guide tubes (41) is rotatably connected to a threaded rod (42), and the other guide tube (41) is equipped with a sliding rod (43). A mounting bracket (44) is provided between the two guide tubes (41). A threaded sleeve (45) is installed on the side of the mounting bracket (44) facing the threaded rod (42). The threaded sleeve (45) is threadedly connected to the threaded rod (42), and the other side of the mounting bracket (44) is slidably connected to the sliding rod (43).

5. A carton sealing device for a carton packaging machine according to claim 1, characterized in that: A pressure roller assembly (5) is provided between the conveyor belts (21). The pressure roller assembly (5) includes a support frame (51), a front roller (52), and a rear roller (54). The front roller (52) and the rear roller (54) are rotatably mounted on the support frame (51). The front roller (52) is rotatably connected to the support frame (51) through a front rotating rod (53). The rear roller (54) is rotatably connected to the support frame (51) through a rear rotating rod (55). A synchronization assembly (56) is installed between the front roller (52) and the rear roller (54).

6. A method for sealing cardboard boxes, characterized in that, Using the sealing device as described in any one of claims 1-5, comprising, S1, Size Pre-adjustment Stage; The spacing is adjusted to the carton width by adjusting the guide rod (221) through the width adjustment component (3), and the height of the guide rod is matched to the carton thickness by adjusting the height of the guide rod (4). S2, Carton transfer stage; Start the conveyor belt (21) motor and place the open carton at the inlet of the conveyor belt (21); S3, pressing and sealing stage; The box is sealed by the pressure roller assembly (5) and the tape wrapped around the pressure roller assembly (5).

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