A paper roll sealing mechanism

Abstract

The utility model relates to a kind of paper roll sealing mechanism, for the paper roll sealing, paper roll sealing mechanism includes: for the paper roll of clamping clamp subassembly;Located above clamp subassembly and for the radial collection and circumferential twist paper end to complete the operation of gathering paper folding subassembly, paper folding subassembly includes the base with through-hole in the center, rotationally arranged on the base driving tab, and the sealing dynamic piece group movably arranged at the through-hole of base, sealing dynamic piece group includes several fan-shaped sealing dynamic pieces, several sealing dynamic pieces are folded and jointly constitute a circular structure, the rotation of driving tab can drive sealing dynamic piece group synchronous radial movement and circumferential rotation, to gather or open;And located above paper folding subassembly and for the paper end of completing the operation of gathering to be compacted and shaped paper subassembly.Compared with prior art, the utility model is firm, fundamentally overcome the defect that traditional mode sealing shape is irregular, easy to loose.

Description

Technical Field

[0001] This utility model relates to the field of sealing machine technology, and in particular to a paper roll sealing mechanism. Background Technology

[0002] In the production and packaging of paper rolls, sealing is required at both ends to prevent the rolls from loosening during transportation and storage. Several technical solutions exist for existing paper roll sealing mechanisms. A common mechanism employs a radial top-block structure. Specifically, this mechanism typically includes a station for accommodating the paper roll and multiple top blocks arranged in a ring at equal intervals around the station. These top blocks can move radially along the paper roll. During operation, the paper roll is fixed, and the multiple top blocks advance radially towards the central axis of the paper roll in a predetermined sequence, squeezing the ends of the paper roll from the outside in, causing folds and inward folding, thus achieving the sealing purpose.

[0003] However, this method has obvious drawbacks: First, because the movement trajectory of the top block is a linear radial movement, its folding force on the paper is unidirectional, which makes it impossible for the paper at the roll end to achieve a regular fold of approximately 90°, resulting in an irregular seal shape; Second, relying solely on the radial compression of the top block, the layers of folded paper lack effective compaction and locking, resulting in incomplete sealing and easy for the seal to spring open and loosen during subsequent processing, affecting packaging quality and product aesthetics.

[0004] To improve the sealing effect, a water-spray sealing method has been proposed in existing technologies. This method, based on the aforementioned mechanical folding, involves spraying a small amount of water mist or vapor onto the folded ends of the roll of paper. The surface tension of the water temporarily binds the paper fibers together, thus helping to maintain the seal. However, this method introduces a new problem: the moist paper ends within the sealed packaging can easily become a breeding ground for bacteria and mold, especially under poor storage and transportation conditions, posing a hygiene and safety hazard. This is unacceptable for hygiene products that come into direct contact with the human body. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the existing technology mentioned above and provide a paper roll sealing mechanism that forms a three-dimensional and stable "bud"-shaped pre-sealing structure, fundamentally overcoming the defects of irregular sealing shape and easy loosening of traditional sealing methods.

[0006] The objective of this utility model can be achieved through the following technical solutions: A paper roll sealing mechanism for sealing a paper roll, the paper roll sealing mechanism comprising: A clamp assembly for holding the roll of paper; A paper folding assembly located above the clip assembly and used for radially closing and circumferentially twisting the end of the roll of paper to complete the closing operation. The paper folding assembly includes a base with a through hole in the center, a drive lever rotatably disposed on the base, and a sealing movable piece group movably disposed at the through hole of the base. The sealing movable piece group includes several fan-shaped sealing movable pieces. When the several sealing movable pieces are closed, they together form a polygonal structure. The rotation of the drive lever can drive the sealing movable piece group to produce synchronous radial movement and circumferential rotation to close or open. And a paper-pressing assembly located above the folding assembly for pressing and shaping the ends of the roll paper after the gathering operation is completed.

[0007] Furthermore, the base is provided with a plurality of first sliding grooves, and each sealing moving piece is provided with a first slider on its lower surface. The first slider is slidably disposed in the first sliding groove to provide radial guidance for the movement of the sealing moving piece assembly.

[0008] Furthermore, the length direction of the first groove extends radially along the base, and a plurality of the first grooves are evenly distributed in the circumferential direction of the base.

[0009] Furthermore, the drive lever has a regular polygonal through hole at its center, and a second groove is provided on the outer side of each side of the regular polygonal through hole. The length direction of each groove is parallel to the extension direction of the side corresponding to the regular polygonal through hole. Each of the sealing movable pieces is provided with a second slider on its upper surface. The second slider is slidably disposed in the second groove to provide circumferential guidance for the movement of the sealing movable piece group.

[0010] Furthermore, the drive lever is provided with a lever, which is connected to the output end of the third cylinder.

[0011] Furthermore, the base is provided with several support blocks in the circumferential direction.

[0012] Furthermore, the paper pressing assembly includes: The first cylinder, the body of which is fixedly mounted on the base of the origami assembly; The first pressure bar, connected to the output end of the first cylinder, is used to move downward after the folding assembly completes the gathering operation, and to perform the first pressing and shaping of the end of the roll paper.

[0013] Furthermore, the paper pressing assembly also includes: A second cylinder is connected to the body of the first cylinder, and the output end of the second cylinder extends into the output end of the first cylinder; And a second pressure bar connected to the output end of the second cylinder and coaxially sleeved in the inner cavity of the first pressure bar, the first pressure bar being used to press the outer peripheral area of ​​the end of the paper roll, and the second pressure bar being used to press the central area of ​​the end of the paper roll.

[0014] Furthermore, the clip assembly includes: Finger cylinder; And two clamping plates connected to the finger cylinder, when the two clamping plates are driven to move closer to each other by the finger cylinder, a clamping cavity is formed between the two clamping plates to clamp the paper roll.

[0015] Furthermore, the paper roll sealing mechanism also includes a support frame and a lifting slider and a fourth cylinder mounted on the support frame. The fourth cylinder is connected to the lifting slider in a transmission manner, driving the lifting slider to move up and down along the support frame. The clamp assembly, folding assembly and pressing assembly are all mounted on the lifting slider and move up and down with it.

[0016] Compared with the prior art, the present invention has the following advantages: (1) The core advantage of this utility model lies in its innovative folding mechanism. Through the combined motion of "radial gathering and circumferential twisting", it achieves neat sealing and initial locking. Compared with the linear compression of the radial top block in the prior art, the folding component of this utility model cleverly decomposes the rotational motion of the driving lever into a combined motion of centripetal movement and rotation around the axis through the double guiding mechanism formed by the second sliding groove arranged in a regular polygon on it and the radial first sliding groove on the base. This makes the moving piece not only perform radial compression when gathering the end of the roll of paper, but also apply a circumferential "twisting" force. This combined action can neatly form a folding angle of approximately 90 degrees, and the circumferential twisting force causes the paper layers to curl and interlock with each other, forming a three-dimensional and stable "bud"-shaped pre-sealed structure, which achieves initial self-locking from a mechanical point of view, and fundamentally overcomes the defects of irregular sealing shape and easy loosening in the traditional method.

[0017] (2) This utility model uses an innovative "double-stage internal and external pressing" structure to precisely and efficiently compact and shape the folded area, ensuring the final firmness and aesthetics of the seal. The paper pressing component is not simply pressed down, but is designed with a nested grading system consisting of a first pressing bar and a second pressing bar. During operation, the hollow outer first pressing bar moves down first, compacting the outer area of ​​the end of the roll paper and initially shaping it. Subsequently, the inner second pressing bar extends out and precisely presses towards the central area. This pressing strategy, which moves from the outside to the inside and in sequence, perfectly conforms to the three-dimensional shape of the "bud-shaped" fold, ensuring uniform pressure distribution. It can completely flatten the folds and avoid stress concentration that could damage the paper. Compared to a single pressing block, this design can achieve comprehensive and thorough compaction from the periphery to the core, making the sealing structure tight, flat, and aesthetically pleasing, and significantly improving mechanical strength, which is sufficient to withstand vibrations and impacts in subsequent processes.

[0018] (3) From the overall design perspective, the components of this utility model work together in an orderly and coordinated manner, with a high degree of integration. While improving the sealing quality, it also ensures the reliability and applicability of the equipment. The mechanism modularly integrates clamping, folding, and pressing functions, and can be raised and lowered as a whole. The clamping components ensure accurate positioning of the roll paper; the folding and pressing components work together vertically and horizontally, with smooth movements; the overall lifting function is suitable for roll paper of different specifications. The detailed design is also ingenious: the cooperation between the support block and the notch ensures that the opening position of the moving piece is accurate and durable; the hinge between the drive lever and the cylinder realizes efficient conversion of the motion form. This highly integrated and precise collaborative design makes the mechanism not only superior and stable in sealing effect, but also efficient in operation, easy to integrate and apply in modern production lines, and has significant comprehensive competitive advantages. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the roll sealing mechanism shown in Example 1 (viewed from bottom to top). Figure 2 This is a schematic diagram of the paper roll sealing mechanism shown in Example 1 (viewed from top to bottom). Figure 3 This is a schematic diagram of the origami assembly shown in Example 1; Figure 4 This is a top view of the origami assembly shown in Example 1; Figure 5 This is a bottom view of the origami assembly shown in Example 1; Figure 6 This is a schematic diagram of the sealing movable piece assembly shown in Example 1; Figure 7 This is a schematic diagram of the base structure shown in Example 1; Figure 8 This is a top view of the base shown in Example 1; Figure 9 This is a schematic diagram of the drive lever shown in Example 1; Figure 10 This is a top view of the drive paddle shown in Example 1.

[0020] Explanation of markings in the diagram: 1-Clamp assembly, 11-Finger cylinder, 12-Clamping plate; 2- Origami components, 21-Base, 211-Through hole, 212-First sliding groove, 213-Support block, 22-Drive lever, 221-Regular polygonal through hole, 222-Second slide groove, 223-Lever, 23-Sealing moving piece assembly, 231-Sealing moving piece, 2311-Notch, 232-First slider, 233-Second slider 24 - Third cylinder, 3-Paper pressing assembly, 31-First cylinder, 32-First pressure bar, 33-Second cylinder, 34-Second pressure bar 4-Support frame, 41-Lifting slider, 42-Fourth cylinder. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments. In the following embodiments or examples, unless otherwise specified, the functional components or structures are conventional components or structures used in the art to achieve the corresponding functions.

[0022] It should be noted that in the description of this utility model, the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] A paper roll sealing mechanism for sealing a paper roll, the paper roll sealing mechanism comprising: Clip assembly 1 for clamping the roll of paper; A paper folding assembly 2 is located above the clip assembly 1 and is used to radially gather and circumferentially twist the end of the rolled paper to complete the gathering operation. The paper folding assembly 2 includes a base 21 with a through hole 211 in the center, a drive lever 22 rotatably disposed on the base 21, and a sealing movable piece group 23 movably disposed at the through hole 211 of the base 21. The sealing movable piece group 23 includes a plurality of fan-shaped sealing movable pieces 231. When the plurality of sealing movable pieces 231 are closed, they together form a circular structure. The rotation of the drive lever 22 can drive the sealing movable piece group 23 to produce synchronous radial movement and circumferential rotation to gather or open. And a paper pressing assembly 3 located above the origami assembly 2 and used to press and shape the ends of the rolled paper after the gathering operation is completed.

[0025] In some specific embodiments, the base 21 is provided with a plurality of first sliding grooves 212, and each sealing moving piece 231 is provided with a first slider 232 on its lower surface. The first slider 232 is slidably disposed in the first sliding groove 212 to provide radial guidance for the movement of the sealing moving piece group 23.

[0026] In some specific embodiments, the length direction of the first groove 212 extends radially along the base 21, and a plurality of the first grooves 212 are evenly distributed in the circumferential direction of the base 21.

[0027] In some specific embodiments, the drive lever 22 is provided with a regular polygonal through hole 221 at its center, and a second groove 222 is provided on the outer side of each side of the regular polygonal through hole 221. The length direction of each groove 222 is parallel to the extension direction of the corresponding side of the regular polygonal through hole 221. Each of the sealing movable pieces 231 has a second slider 233 on its upper surface. The second slider 233 is slidably disposed in the second groove 222 to provide circumferential guidance for the movement of the sealing movable piece group 23.

[0028] In some specific embodiments, the number of the first slide groove 212, the first slider 232, the second slide groove 222, the second slider 233, and the sealing moving piece 231 remains the same.

[0029] In some specific embodiments, the first slider 232 and the second slider 233 are not located on the same vertical line.

[0030] In some specific embodiments, the first slider 232 is located inside the second slider 233.

[0031] In some specific embodiments, the number of sealing flaps 231 is 3 to 12.

[0032] In some specific embodiments, the drive lever 22 is provided with a lever 223, which is connected to the output end of the third cylinder 24.

[0033] In some specific embodiments, the outer end of the lever 223 is hinged to the output end of the third cylinder 24.

[0034] In some specific embodiments, the base 21 is provided with a plurality of support blocks 213 in the circumferential direction.

[0035] In some specific embodiments, the paper pressing assembly 3 includes: The first cylinder 31 is fixedly mounted on the base 21 of the origami assembly 2. The first pressure bar 32, which is connected to the output end of the first cylinder 31, is used to move downward after the paper folding assembly 2 completes the gathering operation, and to perform the first pressing and shaping of the end of the paper roll.

[0036] In some specific embodiments, the paper pressing assembly 3 further includes: A second cylinder 33 is connected to the body of the first cylinder 31, and the output end of the second cylinder 33 extends into the output end of the first cylinder 31. And a second pressure bar 34 connected to the output end of the second cylinder 33 and coaxially sleeved in the inner cavity of the first pressure bar 32, wherein the first pressure bar 32 is used to press the outer peripheral area of ​​the end of the paper roll, and the second pressure bar 34 is used to press the central area of ​​the end of the paper roll.

[0037] In some specific embodiments, the clip assembly 1 includes: Finger cylinder 11; And two clamping plates 12 connected to the finger cylinder 11. When the two clamping plates 12 are driven to move closer to each other by the finger cylinder 141, a clamping cavity for clamping the paper roll is formed between the two clamping plates 12.

[0038] In some specific embodiments, the roll sealing mechanism further includes a support frame 4 and a lifting slider 41 and a fourth cylinder 42 disposed on the support frame 4. The fourth cylinder 42 is connected to the lifting slider 41 in a transmission manner, driving the lifting slider 41 to move up and down along the support frame 4. The clamp assembly 1, the folding assembly 2 and the pressing assembly are all mounted on the lifting slider 41 and move up and down with it.

[0039] Each of the above embodiments can be implemented individually or in any combination of two or more.

[0040] The following description uses specific examples to illustrate the point.

[0041] Example 1 A paper roll sealing mechanism for sealing a paper roll, such as... Figures 1-6 As shown, the roll sealing mechanism includes: Clip assembly 1 for clamping the roll of paper; A paper folding assembly 2 is located above the clip assembly 1 and is used to radially gather and circumferentially twist the end of the rolled paper to complete the gathering operation. The paper folding assembly 2 includes a base 21 with a circular through hole 211 in the center, a drive lever 22 rotatably disposed on the base 21, and a sealing movable piece group 23 movably disposed at the through hole 211 of the base 21. The sealing movable piece group 23 includes 6 fan-shaped sealing movable pieces 231. When the 6 sealing movable pieces 23 are closed, they form a circular structure together. The rotation of the drive lever 22 can drive the sealing movable piece group 23 to produce synchronous radial movement and circumferential rotation to gather or open. And a paper pressing assembly 3 located above the origami assembly 2 and used to press and shape the ends of the rolled paper after the gathering operation is completed.

[0042] In this embodiment, as Figure 7 and 8 As shown, the base 21 is provided with six first sliding grooves 212, and each sealing movable piece 231 has a first slider 232 on its lower surface. The first slider 232 is slidably disposed in the first sliding groove 212, providing radial guidance for the movement of the sealing movable piece assembly 23. The length direction of the first sliding groove 212 extends radially along the base 21, and the six first sliding grooves 212 are evenly distributed in the circumferential direction of the base 21.

[0043] In this embodiment, as Figure 9 and 10 As shown, the drive lever 22 has a regular polygonal through hole 221 (a regular hexagonal through hole in this embodiment) at its center. A second groove 222 is provided on the outer side of each side of the regular polygonal through hole 221. The length direction of each groove 222 is parallel to the extension direction of the corresponding side of the regular polygonal through hole 221. Each of the sealing movable pieces 231 has a second slider 233 on its upper surface. The second slider 233 is slidably disposed in the second groove 222 to provide circumferential guidance for the movement of the sealing movable piece group 23.

[0044] In this embodiment, the number of the first slide groove 212, the first slider 232, the second slide groove 222, the second slider 233, and the sealing moving piece 231 is the same, which is 6 in total.

[0045] In this embodiment, the first slider 232 and the second slider 233 are not located on the same vertical line. The first slider 232 is located inside the second slider 233.

[0046] In this embodiment, a lever 223 is provided on the drive lever 22, and the lever 223 is kinetically connected to the output end of the third cylinder 24. The outer end of the lever 223 is hinged to the output end of the third cylinder 24.

[0047] In this embodiment, the base 21 is provided with six support blocks 213 around its circumference. The support blocks 213 are evenly distributed around the base 21, and their number is consistent with and corresponds one-to-one with the number of sealing movable pieces 231.

[0048] In this embodiment, the paper pressing assembly 3 includes: The first cylinder 31 is fixedly mounted on the base 21 of the origami assembly 2. The first pressure bar 32, which is connected to the output end of the first cylinder 31, is used to move downward after the paper folding assembly 2 completes the gathering operation, and to perform the first pressing and shaping of the end of the paper roll.

[0049] In this embodiment, the paper pressing assembly 3 further includes: A second cylinder 33 is connected to the body of the first cylinder 31, and the output end of the second cylinder 33 extends into the output end of the first cylinder 31. And a second pressure bar 34 connected to the output end of the second cylinder 33 and coaxially sleeved in the inner cavity of the first pressure bar 32, wherein the first pressure bar 32 is used to press the outer peripheral area of ​​the end of the paper roll, and the second pressure bar 34 is used to press the central area of ​​the end of the paper roll.

[0050] In this embodiment, the clip assembly 1 includes: Finger cylinder 11; And two clamping plates 12 connected to the finger cylinder 11. When the two clamping plates 12 are driven to move closer to each other by the finger cylinder 141, a clamping cavity for clamping the paper roll is formed between the two clamping plates 12.

[0051] In this embodiment, the paper roll sealing mechanism further includes a support frame 4 and a lifting slider 41 and a fourth cylinder 42 disposed on the support frame 4. The fourth cylinder 42 is connected to the lifting slider 41 in a transmission manner, driving the lifting slider 41 to move up and down along the support frame 4. The clamp assembly 1, the folding assembly 2 and the pressing assembly are all mounted on the lifting slider 41 and move up and down with it.

[0052] The operation process of this roll sealing mechanism is as follows: (1) Initial state: The clip assembly 1 is in the open position, waiting for the roll of paper to be inserted. The sealing movable piece group 23 of the folding assembly 2 is in the radially open position, and its central through hole 211 is fully open. The first pressure bar 32 and the second pressure bar 34 of the paper pressing assembly 3 are both in the upward retracted position.

[0053] (2) Paper roll positioning and clamping The paper roll is fed by the conveying device between the two clamping plates 12 of the clamping assembly 1. The finger cylinder 11 is activated, driving the two clamping plates 12 to move closer together, forming a clamping cavity in the middle, and firmly clamping the paper roll. At this time, the fourth cylinder 42 drives the paper pressing assembly 3 to move downward, and the end of the paper roll (the end to be sealed) extends upward into the through hole area of ​​the base 21 of the folding assembly 2.

[0054] (3) Paper end gathering and folding The piston rod of the third cylinder 24 extends horizontally. The end of the piston rod is hinged to the lever 223 on the drive pawl 22. When the piston rod moves horizontally, it generates a tangential force on the lever 223 through the hinge point. Since the drive pawl 22 is constrained to the base 21 by a shaft or bearing and can only rotate but not move horizontally, this horizontal force is converted into a torque that causes the drive pawl 22 to oscillate about its center of rotation, thereby driving it to rotate.

[0055] The rotation of the drive lever 22 transmits rotational motion to the sealing movable piece 231 through the engagement of its second groove 222 with the second slider 233 on each sealing movable piece 231. Simultaneously, the first slider 232 on the lower surface of the sealing movable piece 231 is confined within the radial first groove 212 of the base 21, allowing it to slide only radially. The second slider 232 and the second groove 222 provide circumferential driving force, while the first slider 232 and the first groove 212 constrain the motion radially. This combination forces each sealing movable piece 231 to rotate circumferentially while radially retracting towards the center. The six fan-shaped sealing movable pieces 231 synchronously converge towards the center, forming a circular structure. During this process, the end of the rolled paper extending into it is radially compressed and retracted by the inner edge of the moving piece, and twisted due to the circumferential rotation of the moving piece, thus forming a three-dimensional, pleated "bud"-shaped pre-sealing shape.

[0056] (4) Pressing and shaping After the folding assembly completes the gathering operation, the pressing assembly 3 immediately activates to press and shape the unstable "bud"-shaped paper end. The first cylinder 31 drives the first pressing rod 32 downwards, pressing it against the outer periphery of the paper roll end for initial pressing and shaping. Immediately afterwards, the second cylinder 33 drives the second pressing rod 34 to extend from the inner cavity of the first pressing rod 32, pressing it downwards towards the center area of ​​the paper roll end. This nested, sequential pressing method ensures uniform force on both the inside and outside of the seal, resulting in a regular shape and a strong, aesthetically pleasing seal. After pressing, the second pressing rod 34 retracts first, followed by the first pressing rod 32.

[0057] (5) Overall repositioning and unloading The third cylinder 24 reverses the driving direction, causing the drive lever 22 to reverse, and the sealing moving plate assembly 23 to open radially to its limit position. The fourth cylinder 42 then resets the paper pressing assembly 3 upwards, preparing for the next work cycle. The clamp assembly 1 opens, and the sealed roll of paper is removed or falls into the collection device. The initial position of the entire lifting slider 41 determines the final height of the finished roll of paper. The lifting slider 41 is equipped with the fourth cylinder 42, the folding assembly 2, and the paper pressing assembly 3.

[0058] This invention utilizes a unique iris-type origami component to transform a single rotary drive into a composite motion of radial retraction and circumferential twisting of the sealing plate, perfectly simulating the core actions of manual sealing. Combined with an internal and external dual-stage pressing mechanism and an overall lifting function, it achieves a high degree of automation, high efficiency, and high-quality sealing effect for roll paper. The entire principle is clear, and the various components work together in an orderly manner, forming a complete, efficient, and innovative technical solution.

[0059] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A paper roll sealing mechanism, characterized in that, For sealing a roll of paper, the roll sealing mechanism includes: Clip assembly (1) for clamping the roll of paper; A paper folding assembly (2) located above the clip assembly (1) and used for radially closing and circumferentially twisting the end of the paper roll to complete the closing operation. The paper folding assembly (2) includes a base (21) with a through hole (211) in the center, a drive lever (22) rotatably disposed on the base (21), and a sealing movable piece group (23) movably disposed at the through hole (211) of the base (21). The sealing movable piece group (23) includes several fan-shaped sealing movable pieces (231). When the several sealing movable pieces (231) are closed, they form a polygonal structure. The rotation of the drive lever (22) can drive the sealing movable piece group (23) to produce synchronous radial movement and circumferential rotation to close or open. And a paper pressing assembly (3) located above the origami assembly (2) for pressing and shaping the ends of the roll paper after the gathering operation is completed.

2. The paper roll sealing mechanism according to claim 1, characterized in that, The base (21) is provided with a plurality of first grooves (212), and each sealing moving piece (231) is provided with a first slider (232) on its lower surface. The first slider (232) is slidably disposed in the first groove (212) to provide radial guidance for the movement of the sealing moving piece group (23).

3. A paper roll sealing mechanism according to claim 2, characterized in that, The length direction of the first groove (212) extends radially along the base (21), and a plurality of the first grooves (212) are evenly distributed in the circumferential direction of the base (21).

4. A paper roll sealing mechanism according to claim 1, characterized in that, The drive lever (22) has a regular polygonal through hole (221) at its center. A second groove (222) is provided on the outer side of each side of the regular polygonal through hole (221). The length direction of each groove (222) is parallel to the extension direction of the side corresponding to the regular polygonal through hole (221). Each of the sealing movable pieces (231) has a second slider (233) on its upper surface. The second slider (233) is slidably disposed in the second groove (222) to provide circumferential guidance for the movement of the sealing movable piece group (23).

5. A paper roll sealing mechanism according to claim 1, characterized in that, The drive lever (22) is provided with a lever (223), which is connected to the output end of the third cylinder (24) via a transmission.

6. A paper roll sealing mechanism according to claim 1, characterized in that, The base (21) is provided with several support blocks (213) in the circumferential direction.

7. A paper roll sealing mechanism according to claim 1, characterized in that, The paper pressing assembly (3) includes: The first cylinder (31) is fixedly mounted on the base (21) of the origami assembly (2); The first pressure bar (32) connected to the output end of the first cylinder (31) is used to move downward after the paper folding assembly (2) completes the gathering operation, and to perform the first pressing and shaping of the end of the paper roll.

8. A paper roll sealing mechanism according to claim 7, characterized in that, The paper pressing assembly (3) also includes: A second cylinder (33) is connected to the body of the first cylinder (31), and the output end of the second cylinder (33) extends into the output end of the first cylinder (31); And a second pressure bar (34) connected to the output end of the second cylinder (33) and coaxially sleeved in the inner cavity of the first pressure bar (32), the first pressure bar (32) is used to press the outer peripheral area of ​​the end of the paper roll, and the second pressure bar (34) is used to press the central area of ​​the end of the paper roll.

9. A paper roll sealing mechanism according to claim 1, characterized in that, The clip assembly (1) includes: Finger cylinder (11); And two clamping pieces (12) connected to the finger cylinder (11), when the two clamping pieces (12) are driven to come closer to each other by the finger cylinder (141), a clamping cavity for clamping the paper roll is formed between the two clamping pieces (12).

10. A paper roll sealing mechanism according to claim 1, characterized in that, The paper roll sealing mechanism also includes a support frame (4) and a lifting slider (41) and a fourth cylinder (42) mounted on the support frame (4). The fourth cylinder (42) is connected to the lifting slider (41) and drives the lifting slider (41) to move up and down along the support frame (4). The clamp assembly (1), the folding assembly (2) and the pressing assembly are all mounted on the lifting slider (41) and move up and down with it.

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