A roller-type box sealer

Abstract

A kind of roller type sealing machine, including roller support and the box body clamping conveyor belt being arranged in the left and right sides of roller support roller, the upper and lower between box body clamping conveyor belt respectively are provided with opposite adhesive tape sealing device;Roller support includes frame body and the multiple horizontal rotating rollers being freely rotatable and being arranged in the top of frame body;Box body clamping conveyor belt is symmetrically arranged, including vertical closed conveyor belt and pulley being made in the both ends of conveyor belt, adhesive tape sealing device includes left and right setting sealing fixed plate and the front adhesive tape press roller and rear adhesive tape press roller being freely swingable and being arranged between sealing fixed plate, the horizontal rotating roller in the middle part of frame body is two rows, and the front adhesive tape press roller and rear adhesive tape press roller of bottom adhesive tape sealing device are located between the horizontal rotating roller in the middle part.The utility model can make the left and right side of packaging box better with each side conveyor belt contact, prevent the slippage of conveyor belt and packaging box in conveying process, and also can make upper and lower sealing position support firm, and sealing is more neat, flat, firm.

Description

Technical Field

[0001] This utility model relates to a carton sealing machine, specifically a roller-type carton sealing machine. Background Technology

[0002] As a core piece of equipment in modern packaging production lines, carton sealing machines primarily automate processes such as folding the top of cartons, applying tape, or sealing with hot melt adhesive to ensure the safety of goods during transportation. Their role covers key aspects such as improving packaging efficiency, standardizing sealing quality, and reducing labor costs. However, current carton sealing machines still suffer from drawbacks such as high cost, poor adaptability, and a relatively high failure rate, limiting their widespread adoption and application effectiveness.

[0003] The main function of a carton sealing machine is to automatically complete processes such as folding the lid, applying tape / hot melt glue, and pressing and fixing, which greatly improves the packaging speed (e.g., fully automatic models can process 10-30 boxes per minute, which can be used for e-commerce logistics, food and beverage, and electronic product assembly line packaging, ensuring that the tape seal is firm and flat, reducing the risk of box damage during transportation, and some models support "I" or "H" shaped sealing to enhance structural stability).

[0004] However, current carton sealing machines are expensive, with long investment payback periods and high equipment purchase costs. Fully automatic carton sealing machines generally cost over 300,000 yuan, while semi-automatic models cost tens of thousands to hundreds of thousands of yuan, placing a heavy burden on small and medium-sized enterprises. Maintenance costs are also high, with high replacement costs for worn precision parts (such as transmission wheels and bearings), requiring professional technicians for repairs, resulting in significant downtime losses. Size limitations also exist, with strict requirements on carton specifications and the inability to adjust equipment parameters (such as width and height), leading to poor adaptability. For example, utility model (CN223279462U) discloses a carton sealing machine with a protective mechanism, including a carton sealing machine body, a protective plate on the side of the carton sealing machine body, a fixed housing fixedly installed on the side of the carton sealing machine body, one end of the fixed plate fixedly connected to the protective plate, the fixed plate and the fixed housing horizontally slidingly interlocking, the end of the locking rod fixedly connected to the connecting plate, the locking rod vertically slidingly engaging with the fixed plate, and an unlocking component located inside the fixed housing, used to drive the connecting plate away from the fixed plate. This utility model utilizes the combined use of the carton sealing machine body, protective plate, and mounting components. With the help of the mounting components, the protective plate can be stably installed on the side of the carton sealing machine body to protect the side of the carton sealing machine body, but it has the aforementioned disadvantages.

[0005] In addition, there are issues with the material and weight of the cardboard boxes. Cardboard boxes that are too light (such as empty boxes or boxes that are not fully filled) are prone to jamming due to insufficient gripping force of the conveyor belt. Special materials such as foam boxes may cause inaccurate folding or seal failure due to insufficient rigidity. This leads to stability and failure rate issues. Moreover, mechanical failures are frequent. Common problems include wear on the transmission belt, loose bearings, and jamming of the tape cutting mechanism. Some equipment experiences an average of ≥2 failures per week, affecting continuous production. Utility Model Content

[0006] To address the aforementioned problems, the purpose of this utility model is to provide a roller-type carton sealing machine.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: a roller-type box sealing machine, including a roller bracket and a box clamping conveyor belt arranged on the left and right sides of the rollers of the roller bracket, with corresponding tape sealing devices arranged above and below the box clamping conveyor belt. The roller support includes a frame and multiple freely rotatable horizontal rollers mounted on top of the frame; The box body clamps the conveyor belt symmetrically arranged on the left and right, including a vertically closed conveyor belt and pulleys made at both ends of the conveyor belt. The pulleys on one side are driven by a geared motor to drive the conveyor belts on each side to close and rotate. The tape sealing device includes sealing fixing plates arranged on the left and right, and a front tape pressure roller and a rear tape pressure roller arranged between the sealing fixing plates, which can swing freely back and forth. An outwardly extending tape fixing plate is fixed to the outer side of the sealing fixing plate, and a freely rotatable tape mounting roller is provided at the outer end of the tape fixing plate. The sealing fixing plate between the front tape pressure roller and the tape mounting roller is also provided with multiple freely rotatable guide rollers. A tape guide plate is provided between the sealing fixing plates on the front side of the front tape pressure roller, and the part of the guide plate that contacts the tape has a V-shaped opening edge. The tape passing through the edge of the V-shaped opening is positioned in front of the front tape pressure roller. The sealing and fixing plate between the front and rear tape pressure rollers is also equipped with a freely swinging tape cutter. The tape cutter is driven by an elastic component to spring back outwards. The blade of the tape cutter is parallel to the tape and is located at the part where the outer end of the tape cutter contacts the packaging box. When the tape cutter contacts the packaging box, it pushes the blade into the sealing and fixing plate. The front and rear tape pressure rollers are also equipped with elastic components to spring back outwards. The horizontal rollers in the middle of the frame are arranged in two rows and separated by the tape sealing device at the bottom. The front and rear tape pressure rollers of the tape sealing device at the bottom are located between the horizontal rollers in the middle. A set of conveyor belts is set above each of the horizontal rollers in the middle. The reduction motors that drive the conveyor belts on each side are located below the horizontal rollers. The reduction motors are fixed in the frame below the horizontal rollers. The tape sealing device at the top is fixed in the fixed frame set at the top of the frame.

[0008] Furthermore, the front and rear belt pressure rollers are rotatably mounted at the lower end of their respective pressure roller swing rods. The inner ends of the two pressure roller swing rods are respectively passed through fixed rotating shafts, so that each pressure roller swing rod swings around its fixed rotating shaft. One end of the elastic component of the front and rear belt pressure rollers is fixedly connected to the sealing plate, and the other end of the elastic component is fixedly connected to the corresponding pressure roller swing rod, so that the lower end of the pressure roller swing rod rebounds outward.

[0009] Furthermore, the front and rear pressure roller swing rods are rotatably connected by a linkage, and one end of the linkage is rotatably connected to the inner end of the front pressure roller swing rod through a rotating shaft, while the other end of the linkage is rotatably connected to the outer side of the rotating part of the rear pressure roller swing rod. This allows the front belt pressure roller to swing forward and outward through the linkage when it swings backward and outward.

[0010] Furthermore, one side of the tape cutter is a blade rotating frame, which is rotatably fixed to one side of the sealing plate via a rotating shaft, allowing the blade rotating frame to rotate around its rotating shaft. One end of the elastic component of the tape cutter is fixedly connected to the blade rotating frame, and the other end is fixedly connected to the sealing plate, causing the tape cutter to spring back outward. A pressing plate is provided at the outer end of the blade rotating frame, and the blade of the tape cutter is located at the inner end of the pressing plate. The outer end of the pressing plate is used to contact the packaging box.

[0011] Furthermore, a guide roller with multiple rotating rollers is provided on the front side of the tape sealing device at the top, and the bottom of the guide roller is at the same height as the bottom of the front tape roller and the rear tape roller when they are pressed back by the packaging box.

[0012] Furthermore, the two sides of the fixed frame are respectively fixedly connected to the nuts of the vertical lifting screws on both sides of the frame.

[0013] Furthermore, the frame is made with four legs, and each leg has a caster wheel fixed to its lower end for movement.

[0014] The front and rear ends of the frame are respectively equipped with extended roller frames with multiple rollers.

[0015] Furthermore, the bottom of the outer shells at both ends of each side conveyor belt is fixed to the nut sleeves, and the left and right nut sleeves at the front and rear ends are respectively engaged and passed through by the same spacing adjustment screw. The two ends of each spacing adjustment screw pass through the bearings of the frame and extend to the outside of the frame.

[0016] Furthermore, the bottom of the lifting screw housing is fixedly connected via a connecting plate.

[0017] With the above configuration, when sealing the packaging box of this utility model, the symmetrically arranged box body clamps the conveyor belts. Specifically, the geared motor drives the conveyor belts on each side to close and rotate, and the two conveyor belts move in the same direction on opposite sides, from front to back. The packaging box is placed between the front ends of the left and right conveyor belts, with the width of the packaging box almost the same as the distance between the left and right conveyor belts. This ensures that the left and right sides of the conveyor belts can contact the sides of the packaging box, guaranteeing friction between the conveyor belts and the packaging box. The conveyor belts clamp and drive the packaging box to move backward and up and down on the horizontal rollers at the top of the frame. The tape sealing devices are positioned with tape in place, the upper and lower tape sealing devices facing each other. Specifically, the front and rear tape pressure rollers of the upper tape sealing device face downwards, while the front and rear tape pressure rollers of the lower tape sealing device face upwards. The front ends of the upper and lower tapes are located in front of the front tape pressure rollers (i.e., points A and B in the attached diagram), with the adhesive surface facing the incoming packaging box. Initially, the upper and lower front tape pressure rollers extend outwards. This ensures that as the packaging box is conveyed backwards, the side of the inlet end of the packaging box first contacts the adhesive surface of the upper and lower tapes and adheres to the packaging box. As the packaging box continues to move, the upper... The tape continues to cover the upper and lower openings of the packaging box, and during this process, the upper and lower front and rear tape pressure rollers (mainly serving to further press the tape after bonding) further press the upper and lower tapes onto the packaging box under the action of the elastic components. Because the packaging box is relatively wide, and the tape cutter blade is located inside the pressure plate, with the outer end of the pressure plate contacting the packaging box, the tape cutter blade is pressed back between the sealing plates under the action of the packaging box. At this point, the tape cutter blade will not contact the tape. As the packaging box continues to move, the pressure plate detaches from the packaging box... In an instant, the tape cutter rebounds rapidly under the elastic force of the elastic component. Under this elastic force, the cutter blade quickly contacts the tape, cutting the tape between the front tape pressure roller and the packaging box. The cut tape remains at positions A and B of the front tape pressure roller for easy sealing next time. At the same time, the rear tape pressure roller rebounds under the action of the elastic component and continues to contact the tape cut off at the back of the packaging box. This portion of tape is then pressed tightly against the back of the packaging box by the rear tape pressure roller. The packaging box is then pushed out, and the top and bottom openings of the packaging box are securely sealed with tape, completing the packaging box sealing process.

[0018] This invention is not only simple in structure and not easily damaged, but also relatively low in cost. Moreover, because it uses left and right conveyor belts for clamping and conveying, and upper and lower pressure rollers elastically press and adhere the tape, the pressure from the top and bottom not only allows the tape to adhere firmly along the sealing position, but also creates a force that expands outwards to the left and right after the packaging box is pressed down. This force allows the left and right sides of the packaging box to make better contact with the conveyor belts on each side, increasing the friction between the conveyor belt and the packaging box and preventing the conveyor belt from slipping during the conveying process. Similarly, the clamping force of the left and right conveyor belts can also firmly support the upper and lower sealing parts and prevent the upper and lower seals of the packaging box from collapsing inwards. In this way, the sealing of the entire packaging box is neater, flatter, and more secure. Attached Figure Description

[0019] Figure 1 This is a top-view three-dimensional structural diagram of the present invention; Figure 2 This is a bottom-view three-dimensional structural diagram of the present invention; Figure 3 This is a top-view perspective view of the three-dimensional structure of the present invention without the roller bracket; Figure 4 This is a bottom-view three-dimensional structural diagram of the present invention with the roller bracket removed; Figure 5 This is a three-dimensional structural diagram of the tape sealing device of this utility model with one of the sealing fixing plates removed; Figure 6 This is a schematic diagram of the main structure of the tape sealing device of this utility model with one side of the sealing fixing plate removed. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0022] The following is a detailed description of this embodiment with reference to the accompanying drawings: This embodiment provides a roller-type carton sealing machine; please refer to the accompanying drawings in the instruction manual. Figure 1-6 .

[0023] like Figure 1-6 As shown, a roller-type carton sealing machine includes a roller bracket 1 and a carton clamping conveyor belt 2 disposed on the left and right sides of the rollers of the roller bracket 1. Corresponding tape sealing devices 3 are respectively disposed on the upper and lower sides between the carton clamping conveyor belts 2. The roller bracket 1 includes a frame 101 and multiple freely rotatable horizontal rollers 102 disposed on the top of the frame 101. The horizontal rollers 102 serve to support the movement of the packaging box. The box body clamps the conveyor belt 2 symmetrically arranged on the left and right sides, including a vertically closed conveyor belt 201 and pulleys made at both ends of the conveyor belt 201. The pulleys on one side are driven by a reduction motor 202 to drive the conveyor belt 201 on each side to close and rotate. The tape sealing device 3 includes sealing fixing plates 301 arranged on the left and right, and a front tape pressure roller 302 and a rear tape pressure roller 303 arranged between the sealing fixing plates 301 and swinging freely back and forth. A tape fixing plate 311 extending outward is fixed to the outer side of the sealing fixing plate 301, and a freely rotatable tape mounting roller 304 is provided at the outer end of the tape fixing plate 311. Multiple freely rotatable guide rollers 305 are also provided on the sealing fixing plate 301 between the front tape pressure roller 302 and the tape mounting roller 304. A tape guide plate 312 is provided between the sealing fixing plates 301 on the front side of the front tape pressure roller 302, and the part of the guide plate 312 that contacts the tape is a V-shaped opening edge, so that the tape passing through the V-shaped opening edge is located in front of the front tape pressure roller 302. That is, through the guiding action of the guide plate 312 at the end in contact with the tape, the starting end of the tape is positioned precisely... On the front side of the front tape pressure roller 302, especially at the bottom, there is a tape sealing device 3, which facilitates the tape to adhere to the incoming packaging box. The sealing fixing plate 301 between the front tape pressure roller 302 and the rear tape pressure roller 303 is also provided with a freely swinging tape cutter 306. The tape cutter 306 is driven by an elastic component to make the tape cutter 306 spring back outward. The blade of the tape cutter 306 is parallel to the tape and is located at the part where the outer end of the tape cutter 306 contacts the packaging box. When the tape cutter 306 contacts the packaging box, it pushes the blade into the sealing fixing plate 301. The front tape pressure roller 302 and the rear tape pressure roller 303 are also provided with elastic components to make the front tape pressure roller 302 and the rear tape pressure roller 303 spring back outward. The elastic components are preferably springs. The elastic components used in other components are also preferably springs. The specific specifications can be conventionally selected by those skilled in the art as needed. Specifically: The front belt pressure roller 302 and the rear belt pressure roller 303 are rotatably mounted at the lower end of their respective pressure roller swing rods 307. The inner ends of the two pressure roller swing rods 307 are slightly outward, and are respectively passed through fixed rotating shafts, so that each pressure roller swing rod 307 swings around its fixed rotating shaft. One end of the elastic component of the front belt pressure roller 302 and the rear belt pressure roller 303 is fixedly connected to the sealing fixing plate 301, and the other end of the elastic component is fixedly connected to the corresponding pressure roller swing rod 307, so that the lower end of the pressure roller swing rod 307 rebounds outward; The rear pressure roller swing rod 307 is rotatably connected via a linkage rod 308. One end of the linkage rod 308 is rotatably connected to the inner end of the front pressure roller swing rod 307 via a rotating shaft, while the other end of the linkage rod 308 is rotatably connected to the outer side of the rotating part of the rear pressure roller swing rod 307. This allows the front belt pressure roller 302 to swing backward and outward, which in turn drives the rear belt pressure roller 303 to swing forward and outward via the linkage rod 308. The bottom of the belt pressure roller 302 and the outer end of the rear belt pressure roller 303 are almost on the same horizontal plane, facilitating the belt... After the pressure roller 302 retracts, the rear tape pressure roller 303 also retracts synchronously, facilitating the retraction of the rear tape pressure roller 303 onto the tape on the packaging box through elasticity. One side of the tape cutter 306 is a blade rotating frame 309, which is rotatably fixed to one side of the sealing plate 301 via a rotating shaft, allowing the blade rotating frame 309 to rotate around its shaft. One end of the elastic component of the tape cutter 306 is fixedly connected to the blade rotating frame 309, and the other end is fixedly connected to the sealing plate 301, allowing the tape cutter 306 to rotate. 6. The outer end of the blade rotating frame 309 is provided with a pressing plate 310. The blade of the tape cutter 306 is located at the inner end of the pressing plate 310. The outer end of the pressing plate 310 is used to contact the packaging box. The front side of the tape sealing device 3 at the top is provided with a guide roller 4 with multiple rotating rollers. The bottom of the guide roller 4 is at the same height as the bottom of the front tape roller 302 and the rear tape roller 303 when they are pressed back by the packaging box. The guide roller 4 facilitates the better introduction of the initially fastened packaging box, that is, it plays the role of initial pressing and guiding. Before use, put the roll of tape (i.e. the commonly used tape) onto the tape mounting roller 304, pull the tape out and pass it between the two guide rollers 305, and pull the beginning end of the tape to the front side of the front tape pressure roller 302, with the adhesive side of the front tape facing outward.

[0024] The horizontal rollers 102 in the middle of the frame 101 are arranged in two rows and separated by the bottom tape sealing device 3. This ensures that the packaging box can slide and be supported through this section, and also facilitates tape sealing of the bottom of the packaging box. The front tape pressure roller 302 and the rear tape pressure roller 303 of the bottom tape sealing device 3 are located between the horizontal rollers 102 in the middle section. A set of conveyor belts 201 is respectively arranged above the horizontal rollers on each side of the middle section. The reduction motors 202 that drive the conveyor belts 201 on each side are located at the horizontal rollers 102. Below, the reduction motor 202 is fixed inside the frame 101 below the horizontal roller 102. The tape sealing device 3 at the top is fixed inside the fixing frame 103 set at the top of the frame 101. The two sides of the fixing frame 103 are respectively fixedly connected to the nuts of the vertical lifting screws 104 on both sides of the frame 101. The frame 101 is made of four support legs 105, and each support leg 105 is fixed with a universal wheel 106 for movement at its lower end. The front and rear ends of the frame 101 are respectively provided with extended roller frames 1 with multiple rollers. 07. The bottom of the outer shells at both ends of each side conveyor belt 201 are fixed to the nut sleeves 203. The left and right nut sleeves 203 at the front and rear ends are respectively engaged and passed through the same spacing adjustment screw 204. The two ends of each spacing adjustment screw pass through the bearings of the frame 101 and extend to the outside of the frame 101. The bottom of the outer shell of the lifting screw 104 is fixedly connected through the connecting plate 108. By rotating the lifting screw 104, the nut of the corresponding side lifting screw 104 can be raised or lowered, thereby adjusting the height of the fixed frame 103 for packaging boxes of different heights. It can also be adjusted synchronously by personnel on the left and right. Of course, the lifting screws 104 can also be driven by the same specification reduction motor for synchronous electric adjustment. In addition, the threads of the spacing adjustment screws 204 can be set in opposite directions. In this way, when rotating the spacing adjustment screw 204, the nut sleeves 203 on both sides can be moved inward or outward at the same time, which is convenient for simultaneous equal-distance adjustment of the spacing of the left and right conveyor belts 201. It is also possible to rotate the two spacing adjustment screws 204 at the same time for synchronous adjustment.

[0025] Working principle of this utility model: When sealing a packaging box, for rectangular paper boxes with openings at the top and bottom, the symmetrically arranged box body clamps the conveyor belt 2. The geared motor 202 drives the conveyor belts 201 on each side to close and rotate. The two conveyor belts 201 move in the same direction on opposite sides, from front to back, placing the box between the front ends of the left and right conveyor belts 201. The width of the box is almost the same as the distance between the left and right conveyor belts 201, ensuring that the left and right sides of the conveyor belts 201 can contact the sides of the box. This ensures the friction between the conveyor belts 201 and the box, thereby clamping and rotating the box horizontally at the top of the frame 101. As roller 102 moves backward, the upper and lower tape sealing devices 3 place the tapes, with the upper and lower tape sealing devices 3 facing each other. Specifically, the front tape pressure roller 302 and rear tape pressure roller 303 of the upper tape sealing device 3 face downward, while the front tape pressure roller 302 and rear tape pressure roller 303 of the lower tape sealing device 3 face upward. The front ends of the upper and lower tapes are located in front of the front tape pressure roller 302 (i.e., parts A and B in the attached diagram), with the adhesive surface facing the incoming packaging box. Initially, the upper and lower front tape pressure rollers 302 extend outward, ensuring that when the packaging box is conveyed backward, the side of the inlet end of the packaging box first contacts the adhesive surface of the upper and lower tapes and adheres to the packaging box. As the packaging box continues to move, the tape continues to cover the upper and lower openings of the box. During this process, the front tape pressure roller 302 and the rear tape pressure roller 303 (mainly serving to further press the tape after bonding) further press the upper and lower tapes onto the packaging box under the action of the elastic components. Because the packaging box is relatively wide, and the blade of the tape cutter 306 is located at the inner end of the pressing plate 310, with the outer end of the pressing plate 310 contacting the packaging box, the action of the packaging box forces the blade of the tape cutter 306 back between the sealing fixing plates 301. At this point, the blade of the tape cutter 306 will not contact the tape. As the packaging box continues to move, when the pressing... As the plate 310 detaches from the packaging box, the tape cutter 306 instantly rebounds under the elastic force of the elastic component. Under this elastic force, the cutter of the tape cutter 306 quickly contacts the tape, thereby cutting the tape between the front tape pressure roller 302 and the packaging box. The cut tape remains at positions A and B of the front tape pressure roller for easy sealing next time. At the same time, the rear tape pressure roller 303 rebounds under the action of the elastic component and continues to contact the tape cut off from the rear side of the packaging box. This portion of tape is then pressed tightly against the rear side of the packaging box by the rear tape pressure roller 303. The packaging box is then pushed out, and the top and bottom openings of the packaging box are firmly sealed with tape, completing the packaging box sealing process.

[0026] Of course, the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A roller-type carton sealing machine, comprising a roller support (1) and a carton clamping conveyor belt (2) disposed on the left and right sides of the rollers of the roller support (1), characterized in that: The upper and lower parts of the box-clamping conveyor belt (2) are respectively provided with corresponding tape sealing devices (3); The roller support (1) includes a frame (101) and multiple freely rotatable horizontal rollers (102) set on the top of the frame (101). The box-type clamping conveyor belt (2) is symmetrically arranged on the left and right sides, including a vertically closed conveyor belt (201) and pulleys made at both ends of the conveyor belt (201). The pulleys on one side are driven by a geared motor (202) to drive the conveyor belts (201) on each side to close and rotate. The tape sealing device (3) includes sealing fixing plates (301) arranged on the left and right, and a front tape pressure roller (302) and a rear tape pressure roller (303) arranged between the sealing fixing plates (301) and can swing freely back and forth. A tape fixing plate (311) extending outward is fixed on the outer side of the sealing fixing plate (301), and a tape mounting roller (304) that can rotate freely is provided at the outer end of the tape fixing plate (311). Multiple guide rollers (305) that can rotate freely are also provided on the sealing fixing plate (301) between the front tape pressure roller (302) and the tape mounting roller (304). A tape guide pressure plate (312) is provided between the sealing fixing plates (301) on the front side of the front tape pressure roller (302), and the part of the guide pressure plate (312) that contacts the tape is V-shaped. The edge of the opening is such that the tape passing through the edge of the V-shaped opening is located in front of the front tape pressure roller (302). The sealing fixing plate (301) between the front tape pressure roller (302) and the rear tape pressure roller (303) is also provided with a freely swinging tape cutter (306). The tape cutter (306) is driven by an elastic component to make the tape cutter (306) spring back outward. The blade of the tape cutter (306) is parallel to the tape. The blade is located at the part where the outer end of the tape cutter (306) contacts the packaging box. When the tape cutter (306) contacts the packaging box, it pushes the blade into the sealing fixing plate (301). The front tape pressure roller (302) and the rear tape pressure roller (303) are also provided with elastic components to make the front tape pressure roller (302) and the rear tape pressure roller (303) spring back outward. The horizontal rollers (102) in the middle part of the frame (101) are in two rows and are separated by the tape sealing device (3) at the bottom. The front tape pressure roller (302) and the rear tape pressure roller (303) of the bottom tape sealing device (3) are located between the horizontal rollers (102) in the middle part. A set of conveyor belts (201) are respectively set above the horizontal rollers on each side of the middle part. The reduction motor (202) that drives the conveyor belts (201) on each side is located below the horizontal rollers (102). The reduction motor (202) is fixed in the frame (101) below the horizontal rollers (102). The tape sealing device (3) at the top is fixed in the fixed frame (103) set at the top of the frame (101).

2. The roller-type carton sealing machine according to claim 1, characterized in that: The front tape pressure roller (302) and the rear tape pressure roller (303) are rotatably mounted at the lower end of their respective pressure roller swing rods (307). The inner ends of the two pressure roller swing rods (307) are respectively passed through fixed rotating shafts, so that each pressure roller swing rod (307) swings around its fixed rotating shaft. One end of the elastic component of the front tape pressure roller (302) and the rear tape pressure roller (303) is fixedly connected to the sealing plate (301), and the other end of the elastic component is fixedly connected to the corresponding pressure roller swing rod (307), so that the lower end of the pressure roller swing rod (307) rebounds outward.

3. A roller-type carton sealing machine according to claim 2, characterized in that: The front and rear pressure roller swing rods (307) are rotatably connected by a linkage rod (308), and one end of the linkage rod (308) is rotatably connected to the inner end of the front pressure roller swing rod (307) through a rotating shaft. The other end of the linkage rod (308) is rotatably connected to the outer side of the rotating part of the rear pressure roller swing rod (307), so that when the front belt pressure roller (302) swings backward and outward, the linkage rod (308) drives the rear belt pressure roller (303) to swing forward and outward.

4. A roller-type carton sealing machine according to claim 1, characterized in that: One side of the tape cutter (306) is a blade rotating frame (309). The blade rotating frame (309) is fixed to one side of the sealing fixing plate (301) by a rotating shaft, so that the blade rotating frame (309) rotates around its rotating shaft. One end of the elastic component of the tape cutter (306) is fixedly connected to the blade rotating frame (309), and the other end is fixedly connected to the sealing fixing plate (301), so that the tape cutter (306) springs back outward. A pressing plate (310) is provided at the outer end of the blade rotating frame (309). The blade of the tape cutter (306) is located at the inner end of the pressing plate (310), and the outer end of the pressing plate (310) is used to contact the packaging box.

5. A roller-type carton sealing machine according to claim 1, characterized in that: The tape sealing device (3) at the top is provided with a guide roller (4) with multiple rotating rollers on the front side, and the bottom of the guide roller (4) is at the same height as the bottom of the front tape roller (302) and the rear tape roller (303) when they are pressed back by the packaging box.

6. A roller-type carton sealing machine according to claim 1, characterized in that: The two sides of the fixed frame (103) are respectively fixedly connected to the nuts of the vertical lifting screws (104) on both sides of the frame (101).

7. A roller-type carton sealing machine according to claim 1, characterized in that: The frame (101) is made with four legs (105), and each leg (105) has a caster wheel (106) fixed at its lower end for movement.

8. A roller-type carton sealing machine according to claim 1, characterized in that: The front and rear ends of the frame (101) are respectively provided with an extended roller frame (107) with multiple rollers.

9. A roller-type carton sealing machine according to claim 1, characterized in that: The bottom of the front and rear end shells of each side conveyor belt (201) are fixed on the nut sleeve (203) respectively. The left and right nut sleeves (203) at the front and rear ends are respectively engaged and penetrated by the same spacing adjustment screw (204). The two ends of each spacing adjustment screw penetrate the bearing of the frame (101) and extend to the outside of the frame (101).

10. A roller-type carton sealing machine according to claim 6, characterized in that: The bottom of the housing of the lifting screw (104) is fixedly connected by a connecting plate (108).

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