A long-side folding and bonding device for face paper

Abstract

This invention relates to the field of packaging technology and discloses a long-side folding and bonding device for face paperboard, comprising a frame, multiple transport rotating rollers, a transport rotating drive component, two upper guide assemblies, guide rods, and a gluing mechanism. Both upper guide assemblies are used to contact the upper surface of the face paperboard, and the two gluing mechanisms are respectively used to apply glue to the sidewalls of the corresponding long side of the formed bottom paperboard. The vertical distance from the two guide rods to the transport rotating rollers gradually decreases from upstream to downstream, and the spacing between the two guide rods is less than the width of the short side of the face paperboard. The two guide rods are respectively used to fold the corresponding long side of the face paperboard towards the bottom paperboard, and to bond the folded edge of the face paperboard to the glue on the sidewall of the long side of the bottom paperboard. Through the above arrangement, the glue on the long side of the bottom paperboard achieves bonding between the long sides of the face paperboard and the long side of the bottom paperboard.

Description

Technical Field

[0001] This invention relates to the field of packaging technology, and in particular to a device for folding and bonding the long side of a cardboard sheet. Background Technology

[0002] Glass needs to be packaged and protected before transportation, such as using cardboard boxes to pack each piece of glass. Existing glass packaging equipment involves opening externally purchased cardboard boxes, placing the glass inside, and finally gluing the edges of the boxes together. However, this method is difficult for larger pieces of glass. Therefore, the cardboard box can be made of a bottom cardboard and a top cardboard. Specifically, the top cardboard is placed on top of the bottom cardboard (which forms the inner cavity for the glass), and the edges of the top cardboard are folded towards the bottom cardboard along pre-folded lines and then glued together. This completes the bonding and fixing of the top and bottom cardboard. A folding and gluing device suitable for protective cardboard boxes made of bottom and top cardboard needs to be developed to facilitate the insertion of the glass and to glue the long edges of the top cardboard to the bottom cardboard.

[0003] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a face paperboard long edge folding and bonding device, which aims to use two gluing mechanisms to apply glue to the long edge of the bottom paperboard; and use two guide rods to fold the long edge of the face paperboard downwards, so that the long edge of the face paperboard and the long edge of the bottom paperboard are bonded together by glue.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A face paperboard long-side folding and bonding device includes a frame, multiple transport rollers extending laterally on the frame, a transport rotation drive for synchronously rotating the multiple transport rollers, two upper guide components positioned above the transport rollers and extending along the length of the frame, guide rods positioned on the lower surface of the corresponding upper guide components, and gluing mechanisms positioned outside the corresponding guide rods. The multiple transport rollers support and transport a bottom paperboard covered with the face paperboard downstream. Both upper guide components are used to contact the upper surface of the face paperboard, and the two gluing mechanisms are used to apply glue to the sidewalls of the corresponding long side of the formed bottom paperboard. The vertical distance from the two guide rods to the transport rollers gradually decreases from upstream to downstream, and the distance between the two guide rods is less than the width of the short side of the face paperboard. The two guide rods are used to fold the corresponding long side of the face paperboard towards the bottom paperboard, and to bond the folded edge of the face paperboard to the glue on the sidewall of the long side of the bottom paperboard.

[0007] The aforementioned paperboard long-side folding and bonding device includes a guide rod comprising a first connecting rod body, a curved rod body, and a second connecting rod body. The first connecting rod body extends laterally and is fixedly connected to the two inner side walls of the upper guide assembly. The upper end of the curved rod body is fixedly connected to the first connecting rod body, and the curved rod body gradually slopes downward from upstream to downstream. The upper end of the second connecting rod body is connected to the top inner wall of the upper guide assembly, and the lower end of the second connecting rod body is connected to the curved rod body.

[0008] The aforementioned paperboard long-side folding and bonding device includes two upper guide components, each comprising an upper guide frame extending along the length of the frame and having an open lower portion, a plurality of upper guide rollers laterally arranged on the upper guide frame, and an upper guide rotation drive for driving the plurality of upper guide rollers to rotate synchronously; the upper end of the bent rod passes through the gap formed between two adjacent upper guide rollers and is connected to the first connecting rod; the upper end of the second connecting rod passes through the gap formed between two adjacent upper guide rollers and is connected to the interior of the top of the upper guide frame.

[0009] The aforementioned paperboard long-side folding and bonding device includes an upper lifting drive component on the frame. The upper lifting drive component includes an upper lifting motor, an upper connecting rod connected to the output end of the upper lifting motor, and upper screw lifters that are drively connected to both ends of the upper connecting rod. The two upper screw lifters extend vertically, and the two upper screw lifters are respectively fixed to the corresponding outer side wall of the upper guide frame through the upper lifting frame body.

[0010] The aforementioned paperboard long-side folding and bonding device includes upper nut seats on the upper surfaces of the two upper guide frames, with an upper screw threaded between the two upper nut seats. The end of the upper screw is connected to a driving motor in opposite directions. The thread on one side of the upper screw is a forward thread, and the thread on the other side is a reverse thread. The upper screw is used to drive the two upper nut seats to move closer or further apart.

[0011] The aforementioned paperboard long-side folding and bonding device includes an upper first guide sleeve on the upper surface of the two upper guide frames, an upper first guide rod between the two upper first guide sleeves, and the two ends of the upper first guide rod being fixedly connected to the side wall of the upper lifting frame; vertically extending upper second guide rods are respectively provided on both sides of the frame, and upper second guide sleeves are slidably mounted on the upper second guide rods, with the upper second guide sleeves being fixedly connected to the corresponding side wall of the upper lifting frame.

[0012] The aforementioned paperboard long-side folding and bonding device further includes two side guide components, which are respectively inserted into the gap formed by the transport rotating roller and are used to contact the folded edge of the long side of the paperboard.

[0013] The aforementioned paperboard long-side folding and bonding device includes two side guide components, each comprising a lower guide beam extending along the length of the frame, multiple side guide rollers extending vertically and rotatably disposed on the upper surface of the lower guide beam, a lower lifting frame fixedly connected to the lower surface of the two lower guide beams, and a lower lifting drive component for driving the lower lifting frame to rise or fall; the upper parts of the multiple side guide rollers are inserted into the gap formed by the transport rotating roller.

[0014] The aforementioned paperboard long-side folding and bonding device includes a lower lifting drive component comprising a lower lifting motor, a lower connecting rod connected to the output end of the lower lifting motor, and a lower lead screw lifter connected to both ends of the lower connecting rod; the two lower lead screw lifters extend vertically and are respectively fixedly connected to the corresponding outer side wall of the lower lifting frame; the upper surface of the lower lifting frame is also provided with a guide rail extending along the width direction of the frame, and the lower surfaces of the two lower guide beams are respectively provided with sliders, which are slidably mounted on the guide rails.

[0015] The aforementioned paperboard long-side folding and bonding device includes a plurality of rotatable synchronous transport belts located upstream of the frame, the conveying direction of the plurality of synchronous transport belts being perpendicular to the conveying direction of the transport rotating roller; an edge guide rod extending along the length direction of the frame is also located upstream of any of the upper guide components, the edge guide rod being used to abut against the side wall of any long side of the formed bottom paperboard; the edge guide rod is located above the synchronous transport belts.

[0016] Beneficial effects:

[0017] This invention provides a device for folding and bonding the long edge of a cardboard face sheet. A transport roller is used to convey the carton downstream; a gluing mechanism is used to apply glue to the long edge of the bottom cardboard; a guide rod is provided so that the folding lines on the long edge of the face sheet gradually fold downwards as it is conveyed downstream, and the glue on the long edge of the bottom cardboard is used to bond the long edges of the face sheet and the bottom cardboard together; an upper guide assembly is provided to provide an installation position for the guide rod and to provide kinetic energy for conveying the carton downstream. The device has a simple structure and ingenious design. Attached Figure Description

[0018] Figure 1 A schematic diagram of a long-side folding and bonding device for face paper. Figure 1 .

[0019] Figure 2 Schematic diagram of the long-side folding and bonding device for face paperboard Figure 2 .

[0020] Figure 3 This is a schematic diagram of the guide rod.

[0021] Figure 4 Schematic diagram of the long-side folding and bonding device for face paperboard Figure 3 .

[0022] Key component symbols: 1-Frame, 11-Gluing mechanism, 2-Transport rotating roller, 3-Upper guide assembly, 31-Upper guide frame, 32-Upper guide roller, 33-Upper guide rotation drive, 341-Upper lifting motor, 342-Upper connecting rod, 343-Upper screw jack, 344-Upper second guide sleeve, 345-Upper second guide rod, 351-Upper nut seat, 352-Upper screw, 353-First guide sleeve, 354- 36-Upper lifting frame, 4-Guide rod, 41-First connecting rod, 42-Bent rod, 43-Second connecting rod, 5-Side guide assembly, 51-Lower guide beam, 52-Side guide roller, 53-Lower lifting frame, 541-Lower lifting motor, 542-Lower connecting rod, 543-Lower screw jack, 55-Guide rail, 56-Lower guide sleeve, 57-Lower guide rod, 61-Transport timing belt, 62-Side guide rod. Detailed Implementation

[0023] This invention provides a device for folding and bonding the long edge of a face paperboard. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the scope of protection of the invention.

[0024] Please see Figure 1 and Figure 2 This invention provides a long-side folding and bonding device for face paperboard, comprising a frame 1, a plurality of transport rotating rollers 2 extending laterally on the frame 1, a transport rotating drive for driving the plurality of transport rotating rollers 2 to rotate synchronously, two upper guide components 3 disposed above the transport rotating rollers 2 and extending along the length direction of the frame 1, guide rods 4 disposed on the lower surface of the corresponding upper guide components 3, and gluing mechanisms 11 disposed on the outside of the corresponding guide rods 4; the plurality of transport rotating rollers 2 are used to support and transport the bottom paperboard covered with face paperboard downstream; both upper guide components 3 are used to contact the upper surface of the face paperboard, and the two gluing mechanisms 11 are respectively used to apply glue to the sidewall of the corresponding long side of the bottom paperboard after forming; the vertical distance from the two guide rods 4 to the transport rotating rollers 2 gradually decreases from upstream to downstream, the distance between the two guide rods 4 is less than the width of the short side of the face paperboard, and the two guide rods 4 are respectively used to fold the long side of the corresponding side of the face paperboard toward the bottom paperboard, and to bond the folded edge of the face paperboard to the glue on the sidewall of the long side of the bottom paperboard.

[0025] The station preceding the long-side folding and gluing station of the face paperboard is the short-side folding and gluing station of the face paperboard. That is, the short-side folding and gluing station of the face paperboard is used to glue the short side of the face paperboard to the short side of the bottom paperboard. In addition, glass is placed inside the cavity of the formed bottom paperboard.

[0026] In practical applications, the rotation of the transport roller 2 provides kinetic energy for the carton with the long side of the face paper to be glued to be conveyed downstream. As the carton is gradually conveyed downstream, the guide rods 4 located on both sides of the carton, due to their shape, cause the portions on both sides of the long side of the face paper to gradually fold downwards under the external force of the corresponding guide rods 4. Since the purchased face paper has pre-formed pre-folding creases on both sides of the long side, these pre-folding creases can easily fold downwards and form folded edges under the external force of the guide rods 4. Before the folded edges are completed, the gluing mechanism 11 has already applied glue to the sidewalls of the long side of the bottom paperboard. Therefore, under the continuous rotation of the transport roller 2, the long side of the face paperboard can be folded and glued simultaneously. Furthermore, the two upper guide components 3 serve to provide installation positions for the guide rods 4 and can also contact the upper surface of the face paperboard, providing a certain amount of kinetic energy for the downstream conveying of the face paperboard.

[0027] In the above device, the transport roller 2 is used to transport the carton downstream; the gluing mechanism 11 is used to apply glue to the long side of the bottom cardboard; the guide rod 4 allows the folding marks reserved on the long side of the top cardboard to gradually fold downward as it is gradually transported downstream, and the glue on the long side of the bottom cardboard is used to bond the long side of the top cardboard to the long side of the bottom cardboard; the upper guide component 3 provides an installation position for the guide rod 4 and provides kinetic energy for transporting the carton downstream; the above device has a simple structure and ingenious design.

[0028] Please see Figure 3In some embodiments, the guide rod 4 includes a first connecting rod body 41, a curved rod body 42, and a second connecting rod body 43. The first connecting rod body 41 extends laterally and is fixedly connected to the two inner sidewalls of the upper guide assembly 3. The upper end of the curved rod body 42 is fixedly connected to the first connecting rod body 41, and the curved rod body 42 gradually slopes downward from upstream to downstream. The upper end of the second connecting rod body 43 is connected to the top inner wall of the upper guide assembly 3, and the lower end of the second connecting rod body 43 is connected to the curved rod body 42. To accommodate the shape of the upper guide frame 31, the first connecting rod 41 is provided. Since the upper end of the bent rod 42 is connected to the first connecting rod 41, and the lower end of the bent rod 42 is a free end, and the bent rod 42 also needs to provide downward pressure to the face paper, the lower end of the bent rod 42 needs to be fixed. Therefore, the second connecting rod 43 is provided to prevent the lower end of the bent rod 42 from tilting upward during the downward pressure on the face paper, thereby ensuring the downward pressure effect of the pre-folding crease of the face paper.

[0029] Please see Figure 2 In some embodiments, both upper guide assemblies 3 include an upper guide frame 31 extending along the length of the frame 1 and having an open lower portion, a plurality of upper guide rollers 32 laterally extended on the upper guide frame 31, and an upper guide rotation drive member 33 for driving the plurality of upper guide rollers 32 to rotate synchronously; the upper end of the bent rod 42 passes through the gap formed between two adjacent upper guide rollers 32 and connects to the first connecting rod 41; the upper end of the second connecting rod 43 passes through the gap formed between two adjacent upper guide rollers 32 and connects to the interior of the top of the upper guide frame 31. In this embodiment, the upper guide frame 31 is composed of side frames arranged symmetrically on the left and right, and multiple plates connecting the upper surfaces of the two side frames, which can meet the shape requirements of being hollow and having an open lower portion, and can also reduce the weight of the upper guide frame 31. In practical applications, the two ends of the first connecting rod 41 are connected to the inner sidewalls of the two side frames, and the upper end of the second connecting rod 43 is connected to the lower surface of any plate. Specifically, the upper guide rotation drive 33 can be composed of a guide rotation motor disposed on the upper surface of the board, a drive sprocket disposed on the output end of the guide rotation motor, a driven sprocket disposed at one end of a plurality of upper guide rollers 32 (the driven sprocket indicated by the upper guide rotation drive 33 in the figure), and a guide rotation chain wound between the drive sprocket and the driven sprocket. The transport rotation roller 2 contacts the bottom cardboard, and the upper guide roller 32 contacts the top cardboard. The two cooperate with each other to achieve clamping and positioning of the carton in the vertical direction, as well as transmission and transport.

[0030] Please see Figure 2In some embodiments, the frame 1 is equipped with an upward lifting drive component, which includes an upward lifting motor 341, an upper connecting rod 342 connected to the output end of the upward lifting motor 341, and upper screw lifters 343 that are transmittedly connected to both ends of the upper connecting rod 342. The two upper screw lifters 343 extend vertically and are respectively fixed to the corresponding outer side wall of the upper guide frame 31 via an upward lifting frame body 36. This configuration allows the upward lifting frame body 36 to drive the upper guide frame 31 to rise or fall, thereby enabling the guide rod 4 to adapt to the bonding of cartons of different thicknesses, i.e., enabling the long-side folding and bonding device of the face paper to adapt to the packaging of glass of different thicknesses.

[0031] Please see Figure 2 In some embodiments, the upper surfaces of the two upper guide frames 31 are further provided with upper nut seats 351, and an upper screw 352 is threadedly connected between the two upper nut seats 351. The end of the upper screw 352 is connected to a counter-drive motor (not shown in the figure). The thread on one side of the upper screw 352 is a forward thread, and the thread on the other side is a reverse thread. The upper screw 352 is used to drive the two upper nut seats 351 to move closer or further apart. The counter-drive motor drives the upper screw 352 to rotate. Since the upper screw 352 is provided with two opposing threads, the two upper nut seats 351 can be moved closer or further apart. The above arrangement allows the two upper guide frames 31 to move closer or further apart, thereby making the long-side folding and bonding device for faceplates adaptable to packaging glass of different widths.

[0032] Please see Figure 2 In some embodiments, the upper surfaces of the two upper guide frames 31 are further provided with upper first guide sleeves 353, and an upper first guide rod 354 is provided between the two upper first guide sleeves 353. The two ends of the upper first guide rod 354 are respectively fixed to the side walls of the upper lifting frame 36. The upper first guide sleeves 353 and the upper first guide rod 354 are provided to improve the stability of movement when the two upper guide frames 31 move closer or further apart.

[0033] Please see Figure 2 In some embodiments, vertically extending upper second guide rods 345 are respectively provided on both sides of the frame 1, and upper second guide sleeves 344 are slidably disposed on the upper second guide rods 345. The upper second guide sleeves 344 are fixedly connected to the corresponding side walls of the upper lifting frame 36. Similarly, the above configuration is to improve the smoothness of movement of the upper lifting frame 36 when it rises or falls.

[0034] Please see Figure 1In some embodiments, two side guide components 5 are also included. The two side guide components 5 are respectively inserted into the gap formed by the transport rotating roller 2 and are used to contact the folded edge of the long side of the face paperboard. After the long sides of the bottom paperboard and the face paperboard are glued together, the adhesion effect of the glue between the long sides of the bottom paperboard and the face paperboard is further improved by the guidance and compression of the side guide components 5 located on both sides of the carton.

[0035] Please see Figure 1 In some embodiments, both side guide assemblies 5 include a lower guide beam 51 extending along the length of the frame 1, multiple side guide rollers 52 extending vertically and rotatably disposed on the upper surface of the lower guide beam 51, a lower lifting frame 53 fixedly connected to the lower surface of the two lower guide beams 51, and a lower lifting drive for driving the lower lifting frame 53 to rise or fall; the upper parts of the multiple side guide rollers 52 are inserted into the gap formed by the transport rotating roller 2. During the continuous downstream conveying of the carton, the corresponding side guide rollers 52 are driven to rotate synchronously, thereby reducing the friction of the carton during conveying. In addition, the lower lifting drive can drive the multiple side guide rollers 52 to rise or fall synchronously, thereby adapting the long side folding and bonding device of the face paperboard to the packaging of cartons / glass of different thicknesses.

[0036] Please see Figure 1 In some embodiments, the lower lifting drive includes a lower lifting motor 541, a lower connecting rod 542 connected to the output end of the lower lifting motor 541, and a lower lead screw lift 543 that is transmittedly connected to both ends of the lower connecting rod 542. The two lower lead screw lifts 543 extend vertically and are respectively fixed to the corresponding outer side walls of the lower lifting frame 53. The upper surface of the lower lifting frame 53 is also provided with a guide rail 55 extending along the width direction of the frame 1, and the lower surfaces of the two lower guide beams 51 are respectively provided with sliders, which are slidably mounted on the guide rails 55. Specifically, the lower lifting drive has the same structure as the upper lifting drive, which reduces the complexity of the long-side folding and bonding device for the cardboard while meeting production requirements. Furthermore, the guide rails 55 and sliders allow the two lower guide beams 51 to move closer or further apart, enabling them to cooperate with the two upper guide components 3 located above, thus meeting the bonding requirements of cartons of different widths.

[0037] In this schematic diagram, both the upper lifting motor 341 and the lower lifting motor 541 are handwheels.

[0038] Please see Figure 1In some embodiments, a lower guide sleeve 56 is provided on the lower lifting frame 53, and a lower guide rod 57 is slidably disposed in the lower guide sleeve 56, the lower guide rod 57 extending vertically. Similarly, the above-described arrangement is used to improve the stability of the lower lifting frame 53 when it rises or falls.

[0039] In this embodiment, the rotation mode of the transport rotating roller 2 and the transport timing belt 61 may include a transport rotating motor, a driving wheel / sprocket connected to the output end of the transport rotating motor, driven wheels / sprockets disposed on multiple transport rotating rollers 2 / transport timing belts 61, and a timing belt / synchronous chain wound between the driving wheel / sprocket and each driven wheel / sprocket. The rotation mode of the transport rotating roller 2 and the second transport roller is the prior art.

[0040] Please see Figure 4 In some embodiments, a plurality of rotatable synchronous transport belts 61 are further provided upstream of the frame 1, and the conveying direction of the plurality of synchronous transport belts 61 is perpendicular to the conveying direction of the transport rotating roller 2; an edge guide rod 62 extending along the length direction of the frame 1 is further provided upstream of any of the upper guide components 3, and the edge guide rod 62 is used to abut against the side wall of any long side of the formed bottom cardboard; the edge guide rod 62 is located above the synchronous transport belts 61. As described above, the upstream of the long side folding and bonding station of the face cardboard is the short side folding and bonding station of the face cardboard. Through the mutually perpendicular synchronous transport belts 61 and transport rotating roller 2, the conveying direction of the carton is changed. The carton conveyed to the end of the short side folding and bonding station of the face cardboard is guided by the edge guide rod 62 and the synchronous transport belts 61 continue to convey the carton downstream, so that the carton can enter the long side folding and bonding station of the face cardboard in the correct position, and the carton can enter the transport rotating roller 2 and be conveyed to the guide rod 4 in the correct position.

[0041] In summary, the present invention utilizes a transport roller 2 to convey the carton downstream; a gluing mechanism 11 to apply glue to the long side of the bottom cardboard; a guide rod 4 to allow the folding marks on the long side of the top cardboard to gradually fold downwards as it is conveyed downstream, and to achieve adhesion between the long sides of the top and bottom cardboard using the glue on the long side of the bottom cardboard; and an upper guide assembly 3 to provide an installation position for the guide rod 4 and to provide kinetic energy for conveying the carton downstream. The above device has a simple structure and ingenious design.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," 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 invention 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 invention.

[0043] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A device for folding and bonding the long side of a face paperboard, characterized in that, The system includes a frame, multiple transport rollers extending laterally on the frame, a transport rotation drive for synchronously rotating the multiple transport rollers, two upper guide assemblies positioned above the transport rollers and extending along the length of the frame, guide rods positioned on the lower surfaces of the corresponding upper guide assemblies, and gluing mechanisms positioned outside the corresponding guide rods. The multiple transport rollers support and transport a bottom sheet covered with a face sheet downstream. Both upper guide assemblies contact the upper surface of the face sheet, and the two gluing mechanisms apply glue to the sidewalls of the corresponding long sides of the formed bottom sheet. The vertical distance between the two guide rods and the transport rollers gradually decreases from upstream to downstream. The spacing is less than the width of the short side of the face paper. The two guide rods are used to fold the corresponding long side of the face paper towards the bottom paper, and to bond the folded edge of the face paper to the adhesive on the long sidewall of the bottom paper. Each guide rod includes a first connecting rod, a curved rod, and a second connecting rod. The first connecting rod extends laterally and is fixed to the two inner sidewalls of the upper guide assembly. The upper end of the curved rod is fixed to the first connecting rod, and the curved rod gradually slopes downwards from upstream to downstream. The upper end of the second connecting rod is connected to the top inner wall of the upper guide assembly, and the lower end of the second connecting rod is connected to the curved rod. Both upper guide assemblies include components extending along the length of the frame and having an open lower portion. The system includes an upper guide frame, multiple upper guide rollers extending laterally on the upper guide frame, and an upper guide rotation drive for synchronously rotating the multiple upper guide rollers; the upper end of the bent rod passes through the gap formed between two adjacent upper guide rollers and connects to the first connecting rod; the upper end of the second connecting rod passes through the gap formed between two adjacent upper guide rollers and connects to the interior of the top of the upper guide frame; it also includes two side guide assemblies, each of which is inserted into the gap formed by the transport rotating rollers and is used to contact the folded edge of the long side of the face paper; each of the two side guide assemblies includes a lower guide beam extending along the length direction of the frame, and multiple rollers extending vertically and rotatably disposed on the upper surface of the lower guide beam. The system comprises a root side guide roller, a lower lifting frame fixedly connected to the lower surfaces of the two lower guide beams, and a lower lifting drive for driving the lower lifting frame to rise or fall; the upper parts of the multiple side guide rollers are inserted into the gap formed by the transport rotating rollers; the lower lifting drive includes a lower lifting motor, a lower connecting rod connected to the output end of the lower lifting motor, and a lower screw jack connected to both ends of the lower connecting rod; the two lower screw jacks extend vertically and are respectively fixedly connected to the corresponding outer side walls of the lower lifting frame; the upper surface of the lower lifting frame is also provided with a guide rail extending along the width direction of the frame, and the lower surfaces of the two lower guide beams are respectively provided with sliders, which are slidably mounted on the guide rails.

2. The paperboard long-side folding and bonding device according to claim 1, characterized in that, The frame is provided with an upper lifting drive component, which includes an upper lifting motor, an upper connecting rod connected to the output end of the upper lifting motor, and an upper screw lifter that is driven to both ends of the upper connecting rod; the two upper screw lifters extend vertically, and the two upper screw lifters are respectively fixed to the outer side wall of the upper guide frame through the upper lifting frame body.

3. The paperboard long-side folding and bonding device according to claim 2, characterized in that, The upper surfaces of the two upper guide frames are also provided with upper nut seats, and an upper screw is threadedly connected between the two upper nut seats. The end of the upper screw is connected to the opposite drive motor. The thread on one side of the upper screw is a forward thread, and the thread on the other side is a reverse thread. The upper screw is used to drive the two upper nut seats to move closer to each other or further away from each other.

4. The paperboard long-side folding and bonding device according to claim 3, characterized in that, The upper surfaces of the two upper guide frames are also provided with upper first guide sleeves, and upper first guide rods are provided between the two upper first guide sleeves. The two ends of the upper first guide rods are respectively fixed to the side walls of the upper lifting frame. Vertically extending upper second guide rods are provided on both sides of the frame. Upper second guide sleeves are slidably provided on the upper second guide rods, and the upper second guide sleeves are fixed to the corresponding side walls of the upper lifting frame.

5. The paperboard long-side folding and bonding device according to claim 1, characterized in that, The upstream of the frame is also provided with multiple rotatable synchronous transport belts, the conveying direction of the multiple synchronous transport belts being perpendicular to the conveying direction of the transport rotating roller; the upstream of any of the upper guide components is also provided with a side guide rod extending along the length direction of the frame, the side guide rod being used to abut against the side wall of any long side of the formed bottom cardboard; the side guide rod is located above the synchronous transport belt.

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