Paper box folding mechanism, lid folding device, and box sealing machine

Abstract

To provide a paper box folding mechanism, a lid folding device, and a box sealing machine which effectively prevent the occurrence of misalignment and deformation of a box, have little effect on deformation of the box and the box body in the longitudinal direction, and have a space-saving effect. [Solution] The carton folding mechanism replaces the two guide rods 2 and 3 arranged in a figure-eight shape with a symmetrically arranged spiral guide rod. The spiral guide rod is connected to a rotating shaft 4 via spokes. A drive assembly 5 rotates the rotating shaft, which in turn rotates the spiral guide rod, folding the carton on both sides of the length in the transport direction of the packaging box to seal the lid. In addition to reducing the length of the guide rod, this invention also generates two rotation vectors when the spiral guide rod rotates: one vector in the transport direction of the packaging box, and the other vector for folding the length inward on the length. Compared to the way conventional guide rods apply resistance, the spiral rotatable guide rod applies a gentle force to the length of the carton.

Description

[Technical Field]

[0001] The present invention relates to the technical field of packaging machines, in particular to the technical field of carton sealing machines, and more particularly to a carton folding mechanism, a lid folding device, and a carton sealing machine. [Background technology]

[0002] Typically, at the final stage of a factory's production process, products must be packed into cardboard boxes, and automatic box sealing machines are often used for this purpose. Automatic box sealing machines are primarily used for sealing and packaging cardboard boxes. They can also handle single cardboard boxes. They can also be combined with other equipment, such as cardboard forming and unpacking machines, case packing machines, labeling machines, packing machines, pallet stacking machines, and conveyors, to form a packaging production line, making them an essential piece of equipment for packaging production lines.

[0003] When folding and sealing the box flaps, existing sealing machines use the conveying action of a bottom conveying mechanism to bring the short box flaps on the front side of the packaging box into contact with the front folding members and fold the short box flaps backward to seal the opening of the packaging box, then use the swinging rear folding members to fold the short box flaps on the rear side of the packaging box forward to seal the opening of the packaging box, and then use two eight-shaped guide rods in the conveying state to guide and fold the long box flaps on both the left and right sides of the packaging box.

[0004] The utility model patent, registered with patent number CN218198945U on January 3, 2023, is entitled "Lid Folding Mechanism for Box Sealing Machine." This utility model uses a swing arm arranged in an eight-shape to guide the long box flaps of a packaging box and fold the lid back to seal it. That is, as the packaging box conveying device conveys the long box flaps on both sides of the box in the conveying direction, they come into contact with the swing arms. As the distance between the two swing arms gradually decreases, a force is applied to the long box flaps, causing them to fold inward and sealing the lid. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] China Utility Model Registration CN218198945U Summary of the Invention [Problem to be solved by the invention]

[0006] Existing sealing machines rely on a box conveying device to fold the long box flaps on both sides of the box. As the box is moved by the box conveying device, guide rods or swing arms apply resistance to the long box flaps, causing them to fold inward. However, this method can cause the box flaps of the box to become misaligned or deformed. Furthermore, the eight-shaped guide rods require a considerable length to fold the long box flaps, which increases the length of the sealing machine.

[0007] In order to overcome the defects and shortcomings of the prior art, this utility model first provides a carton folding mechanism. The purpose of this utility model is to solve the problem that the long box flaps on both sides of the packing box in the transport direction of the packing box are easily misaligned and deformed due to the structure of the existing packing box sealing machine to guide and fold them, and also to solve the problem that the guide rods arranged in an eight-shaped pattern of the existing packing box sealing machine are too long. [Means for solving the problem]

[0008] This utility model replaces the two existing eight-shaped guide rods with a symmetrical spiral guide rod. These spiral guide rods are connected to a rotating shaft via spokes. A drive assembly rotates the rotating shaft, which in turn rotates the spiral guide rod. The rotating spiral guide rod folds the long box flaps on both sides of the box in the conveying direction to seal the lid. This utility model replaces the existing fixed guide rod with a spirally arranged rotatable guide rod. This reduces the length of the guide rod. Furthermore, when the spiral guide rod rotates, it generates two rotation vectors: one in the conveying direction of the box and the other for folding the long box flaps inward. Compared to the existing method of applying resistance force using guide rods, the spirally rotatable guide rod of this utility model applies a gentle force to the long box flaps, effectively preventing misalignment and deformation of the box flaps. This has less impact on the long box flaps and the box itself, and also saves space.

[0009] In order to solve the above problems in the prior art, the present invention is realized by the following technical solutions.

[0010] A first aspect of this utility model provides a carton folding mechanism, the carton folding mechanism comprising a carton flap folding mounting frame, a first guide rod, a second guide rod, a rotating shaft, a drive assembly, and a transmission assembly, the rotating shaft is rotatably mounted on the carton flap folding mounting frame, the first guide rod and the second guide rod are arranged in a spiral, and the first guide rod and the second guide rod are fixed to both ends of the rotating shaft via connecting spokes or connecting spoke plates, and the first guide rod and the second guide rod are arranged symmetrically, the drive assembly rotates the rotating shaft via the transmission assembly, and the rotating shaft rotates the first guide rod and the second guide rod at both ends thereof.

[0011] More preferably, the first guide rod and the second guide rod are circular rings having a notch when projected along the axis of the rotation shaft.

[0012] More preferably, the transmission assembly includes a main transmission wheel, a subordinate transmission wheel, and a transmission belt, the main transmission wheel is assembled to the output shaft of the drive assembly, the subordinate transmission wheel is fixed coaxially with the rotation shaft, and the transmission belt realizes transmission between the main transmission wheel and the subordinate transmission wheel.

[0013] More preferably, the drive assembly includes a servo motor and a reducer.

[0014] More preferably, the box flap folding mounting frame includes a first mounting plate, a second mounting plate, a first mounting support and a second mounting support, the first mounting plate is fixedly assembled to the first mounting support, the second mounting plate is fixedly assembled to the second mounting support, the first mounting plate and the second mounting plate are arranged symmetrically, and a gap is arranged between the first mounting plate and the second mounting plate.

[0015] More preferably, the dependent transmission wheel on the rotation shaft is located between the first mounting plate and the second mounting plate.

[0016] The second aspect of this utility model provides a lid folding device. The lid folding device provided in this utility model is a further improvement of the carton folding mechanism provided in the first aspect. The rear folding section is improved. Conventional rear folding members are driven by a cylinder to swing back and forth, which causes relatively violent movement and large vibrations, making the rear short box flaps of the carton easily damaged, preventing the carton from closing or closing securely, thereby affecting sealing quality. Therefore, the second aspect of this utility model provides a lid folding device that improves the conventional cylinder-driven swinging rear folding member to a circulating rotating rear folding member driven by a motor, reducing vibrations, reducing the rate of damage to the rear short box flaps, and improving the folding stability of the rear short box flaps.

[0017] A second aspect of the present invention provides a lid folding device, which includes the carton folding mechanism of the first aspect of the present invention, in which a front folding member installed under the rear end of the box flap folding mounting frame folds the front short box flaps of the packaging box backward, and a cyclically rotating rear folding member is installed at the rear end of the box flap folding mounting frame, and the rear folding member is installed on the box flap folding mounting frame via a rotating shaft, and the rear folding member is driven by a driving assembly via a transmission assembly to realize the cyclic rotation of the rear folding member.

[0018] More preferably, the rear folding member has an L-shaped structure, and the surface that comes into contact with the short box flap of the carton when the rear folding member rotates is an arcuate surface.

[0019] More preferably, the rear folding member is disposed between the first mounting plate and the second mounting plate of the box flap folding mounting frame.

[0020] A third aspect of the present invention provides a box sealing machine, comprising a packaging box conveying mechanism, a lifting gantry, and the carton lid folding device and taping machine core as described in the second aspect of the present invention, wherein the lifting gantry is disposed above the packaging box conveying mechanism, the carton lid folding device is assembled to the rear side of the lifting gantry, and the taping machine is disposed in front of the lifting gantry. [Effects of the Invention]

[0021] Compared with the prior art, the beneficial technical effects brought about by this utility model are as follows:

[0022] 1. This utility model replaces the two existing eight-shaped guide rods with a symmetrical spiral guide rod. These spiral guide rods are connected to a rotating shaft via spokes, which rotates the rotating shaft via a drive assembly, which then rotates the spiral guide rod. The rotating spiral guide rod folds the long box flaps on both sides of the box in the conveying direction to seal the lid. This utility model replaces the existing fixed guide rod with a rotatable spiral guide rod. This reduces the length of the guide rod. Furthermore, the spiral guide rod generates two rotation vectors when rotating: one in the conveying direction of the box, and the other for folding the long box flaps inward. Compared to the existing method of applying resistance force using guide rods, the spiral rotatable guide rod of this utility model applies a gentle force to the long box flaps, effectively preventing misalignment and deformation of the box flaps. This has less impact on the long box flaps and the box itself, and also saves space.

[0023] 2. In this utility model, the projection of the first and second guide rods along the axis of the rotation shaft is a circular ring with a notch. The notch is designed to avoid the long box flaps on both sides of the packaging box being transported and prevent them from affecting the packaging box being transported. The notch allows the long box flaps to enter the spiral range of the first and second guide rods, making it easier for the long box flaps to fold as the first and second guide rods rotate. The spiral guide rod of this utility model is suitable for packaging boxes in a transporting state and can also be used for packaging boxes in a stationary state. The provision of the spiral guide rod allows the long box flaps to fold inward even when the packaging box is stationary.

[0024] 3. The drive assembly of this utility model adopts a combination of a servo motor and a reducer, and the rotation speed of the first guide rod and the second guide rod are controlled by a program, particularly realizing speed control of the two-way force vector exerted by the spiral guide rod on the long box flap, so that the folding speed of the long box flap matches the conveying speed of the packaging box, further easing the folding action of the long box flap and avoiding deformation of the long box flap on the packaging box and misalignment of the packaging box.

[0025] 4. The box flap folding mounting frame of this utility model is formed by providing a distance between the first mounting plate and the second mounting plate. On the one hand, the stability of the box flap folding mounting frame is improved, and vibration during operation of the folding mechanism is reduced. On the other hand, the structural strength is improved and the first and second guide rods are effectively supported, reducing vibration during rotation and reducing the impact on the packaging box, thereby improving operational stability.

[0026] 5. The carton lid folding device of this utility model is a further improvement on the carton flap folding mechanism, with an improved rear folding section. Conventional rear folding members are driven by a cylinder to swing back and forth, which causes relatively violent movements and large vibrations, making the rear short flaps of the carton easily damaged, preventing the carton from closing or closing securely, thereby affecting sealing quality. Therefore, the second aspect of this utility model provides a carton lid folding device that improves the conventional cylinder-driven swinging rear folding member with a circulating rotating rear folding member, which is driven by a motor, reduces vibrations, reduces the damage rate of the rear short flaps of the carton, and improves the folding stability of the rear short flaps.

[0027] 6. In this utility model, the rotational power of the rear folding member and the rotational power of the first and second guide rods share a common power source, thereby reducing equipment costs. Synchronous transmission is achieved through a transmission assembly, and smooth motion transmission can be achieved by controlling the distance between the rear folding member and the first and second guide rods. Furthermore, the motion of the two can be synchronized by controlling the transmission ratio between the two. Alternatively, the rotational power of the rear folding member and the rotational power of the first and second guide rods are independent power sources, and their motion can be synchronized by sequentially controlling them.

[0028] 7. The rear folding element of this utility model is also driven by a servo motor and a reducer, and its operation can be triggered by the position of a sensor or conveyor belt. When used as a standalone box-sealing machine, it is best to use a sensor to trigger its operation. When incorporated into an all-in-one unpacking, filling, and sealing machine, it is best to use the position of the packaging box conveyor as the trigger. Compared to the conventional air cylinder-driven reciprocating swing method, it requires less space, has better control over its operation, and provides softer movement, preventing damage to the box flaps.

[0029] 8. The rear folding element of this utility model has an L-shaped structure, and the surface that comes into contact with the short box flaps of the carton when the rear folding element rotates is an arc-shaped surface, which reduces the force that the rear folding element exerts on the short rear box flaps and prevents damage to the short rear box flaps.

[0030] 9. The rear folding member of the present utility model is rotatably mounted between the first mounting plate and the second mounting plate, which improves operational stability, reduces vibration, improves the sealing effect of the packaging box, and avoids any impact on the packaging box.

[0031] 10. Compared with existing sealing machines, the sealing machine of this utility model adopts rotatable spiral first and second guide rods, which shortens the length of the sealing machine. The force applied to the long box flaps of the packaging box is softer, more uniform, and more stable, preventing deformation and misalignment of the box flaps. In addition, the circulating rear folding element reduces damage to the short box flaps on the rear side, improving operational stability and making the machine safer and more efficient. [Brief explanation of the drawings]

[0032] [Figure 1] FIG. 1 is a three-dimensional structural image of the paper box folding mechanism and paper box lid folding device of the present utility model. [Figure 2] FIG. 2 is an image diagram of the three-dimensional structure of the present utility model in which the first guide rod or the second guide rod and the rotating shaft are assembled. [Figure 3] FIG. 3 is a side view of the structure of the present utility model in which the first guide rod or the second guide rod and the rotary shaft are assembled. [Figure 4] FIG. 4 is a rear structural image diagram of the paper box folding mechanism and paper box lid folding device of the present utility model. [Figure 5] FIG. 5 is a side structural image diagram of the paper box folding mechanism and paper box lid folding device of the present utility model. [Figure 6] FIG. 6 is a plan view of the structure of the paper box folding mechanism and the paper box lid folding device of the present utility model. [Figure 7] FIG. 7 is a three-dimensional structural image of a part of the frame of the paper box sealing machine of this utility model that is hidden. [Figure 8] FIG. 8 is an image diagram of the rear structure of the paper box sealing machine of this utility model, showing a part of the frame that is hidden. [Figure 9] FIG. 9 is a conceptual diagram of the three-dimensional structure of the paper box sealing machine of this utility model. [Figure 10] FIG. 10 is an image diagram of the main structure of the paper box sealing machine of this utility model. DETAILED DESCRIPTION OF THE INVENTION

[0033] The technical solutions in the embodiments of this utility model are described below clearly and completely with reference to the accompanying drawings of the specification of this utility model. Note that the described embodiments are only some of the embodiments of this utility model, not all of them. All other embodiments that can be obtained by a person skilled in the art based on the embodiments of this utility model without any creative work are all within the scope of protection of this utility model.

[0034] The terms "front" and "rear" used in this application are defined based on the conveying direction of the packaging box in the conveying system. The moving direction of the packaging box along the conveying path is defined as "rear-to-front." That is, the position the packaging box is about to reach is considered "front," and the position it has already left is considered "rear." The above definitions are intended only to help those skilled in the art understand the relative positional relationships in the solution of the technical solution, and do not specifically limit the actual installation position or spatial orientation of each component in this application. [Example]

[0035] 1, 4, 5 and 6 of the specification, a preferred embodiment of the present invention discloses a carton flap folding mechanism, which includes a carton flap folding mounting frame 1, a first guide rod 2, a second guide rod 3, a rotating shaft 4, a drive assembly 5 and a transmission assembly 6. The rotating shaft 4 is rotatably mounted on the carton flap folding mounting frame 1, and the first and second guide rods 2 and 3 are arranged in a spiral. The first and second guide rods 2 and 3 are fixed to both ends of the rotating shaft 4 by a connecting spoke plate 7, and the first and second guide rods 2 and 3 are arranged symmetrically. The drive assembly 5 rotates the rotating shaft 4 through the transmission assembly 6, and the rotating shaft 4 rotates the first and second guide rods 2 and 3 at its both ends.

[0036] As another implementation method of this embodiment, referring to Figures 2 and 3 of this specification, in order to save material, the first guide rod 2 and the second guide rod 3 can be fixedly connected to the rotating shaft 4 by connecting spokes 8 while ensuring the supporting strength of the first guide rod 2 and the second guide rod 3.

[0037] In the present embodiment, the pitch at which the first guide rod 2 and the second guide rod 3 are spirally arranged is set according to the width and / or length of the packaging box 100. In the present application, the pitch of the first guide rod 2 and the second guide rod 3 is not particularly limited.

[0038] In a modified embodiment of this embodiment, when a connecting spoke plate 7 is used, the outer edge of the connecting spoke plate 7 can be rolled up to form the first guide rod 2 and / or the second guide rod 3 described above.

[0039] In another variation of this embodiment, when a connecting spoke plate 7 is used, the outer edge of the connecting spoke plate 7 can be curved so that the outer edge can be used as the first guide rod 2 and / or the second guide rod 3. After the outer edge of the connecting spoke plate 7 is curved, the contact surface between the outer edge and the box flap is smooth, preventing damage to the box flap due to friction.

[0040] As another variation of this embodiment, when a connecting spoke plate 7 is employed, the outer edge of the connecting spoke plate 7 can be used as the first guide rod 2 and / or the second guide rod 3 .

[0041] In this utility model, two guide rods arranged in a figure-eight configuration are arranged symmetrically into a spiral guide rod, and these spiral guide rods are connected to a rotating shaft via connecting spokes 8 or connecting spoke plate 7. A drive assembly 5 rotates the rotating shaft 4, which in turn rotates the spiral guide rod. The rotating spiral guide rod folds the long box flaps on both sides of the packaging box 100 in the conveying direction to seal the lid. In this embodiment, a rotatable spiral guide rod is used instead of the existing fixed guide rod. This reduces the length of the guide rod. Furthermore, when the spiral guide rod rotates, it generates two rotation vectors: one vector in the conveying direction of the packaging box 100, and the other vector for folding the long box flaps inward. Compared with the existing method of applying resistance force using a guide rod, the spiral rotatable guide rod of this utility model applies a soft force to the long box flaps, effectively preventing the box flaps from shifting position or deforming, minimizing the impact on the long box flaps and deformation of the box body, and saving space. [Example]

[0042] As another preferred embodiment of the present invention, this embodiment provides a more detailed supplementary explanation of the technical solution of the present invention based on the above-mentioned embodiment 1. In this utility model, referring to FIG. 4 of the specification, the projection of the first guide rod 2 and the second guide rod 3 along the axis of the rotation shaft 4 is a circular ring with a notch 9. The notch 9 is designed to avoid the long box flaps on both sides of the packaging box 100 being transported and prevent them from being affected by the packaging box 100 being transported. The notch 9 allows the long box flaps to enter the spiral range of the first guide rod 2 and the second guide rod 3, making it easier for the long box flaps to fold as the first guide rod 2 and the second guide rod 3 rotate. The spiral guide rod of this utility model is suitable for the packaging box 100 in a transporting state and can also be applied to the packaging box 100 in a stationary state. The provision of the spiral guide rod allows the long box flaps to fold inward even when the packaging box 100 is stationary.

[0043] In another embodiment of the present invention, the transmission assembly 6 includes a main transmission wheel, a subordinate transmission wheel, and a transmission belt 10. The main transmission wheel is mounted on the output shaft of the drive assembly 5, the subordinate transmission wheel is fixed coaxially with the rotating shaft 4, and the transmission belt 10 realizes the transmission between the main transmission wheel and the subordinate transmission wheel. In a variation of this embodiment, the transmission assembly 6 can be replaced with a chain and sprockets, or a synchronous belt and synchronous wheels.

[0044] In another embodiment of the present invention, the drive assembly 5 includes a servo motor 11 and a reducer 12, which programmatically controls the rotation speed of the first guide rod 2 and the second guide rod 3, particularly controlling the speed of the two-way force vector exerted by the spiral guide rod on the long box flap, so that the folding speed of the long box flap matches the conveying speed of the packaging box 100, further easing the folding action of the long box flap and avoiding deformation of the long box flap of the packaging box 100 or misalignment of the packaging box. [Example]

[0045]

[0023] As another preferred embodiment of the present invention, this embodiment provides a more detailed supplementary explanation of the technical solution of the present invention based on the above-mentioned embodiment 1 or 2. As one implementation method of this embodiment, referring to Figures 1 and 6 of the accompanying drawings of the specification, the box flap folding mounting frame 1 includes a first mounting plate 13, a second mounting plate 14, a first mounting support 15, and a second mounting support 16, the first mounting plate 13 is fixedly assembled to the first mounting support 15, and the second mounting plate 14 is fixedly assembled to the second mounting support 16, the first mounting plate 13 and the second mounting plate 14 are symmetrically arranged, and a gap is arranged between the first mounting plate 13 and the second mounting plate 14. Meanwhile, the stability of the box flap folding mounting frame 1 is improved, and vibration during operation of the folding mechanism is reduced. On the other hand, the structural strength has been improved and the first and second guide rods are effectively supported, which reduces vibration during rotation, reduces the impact on the packaging box, and improves operational stability.

[0046] In a further preferred implementation, the slave transmission wheel on the rotation axis 4 is arranged between the first mounting plate 13 and the second mounting plate 14 . [Example]

[0047]

[0014] As another preferred embodiment of the present invention, referring to Figures 1, 4, 5 and 6 of the specification, this embodiment discloses a carton lid folding device, comprising a box flap folding mounting frame 1, a first guide rod 2, a second guide rod 3, a rotating shaft 4, a driving assembly 5 and a transmission assembly 6, the rotating shaft 4 is rotatably mounted on the box flap folding mounting frame 1, the first guide rod 2 and the second guide rod 3 are arranged in a spiral, and the first guide rod 2 and the second guide rod 3 are fixed to both ends of the rotating shaft 4 by connecting spokes 8 or connecting spoke plates 7, and the first guide rod 2 and the second guide rod 3 are arranged symmetrically, the driving assembly 5 rotates the rotating shaft 4 through the transmission assembly 6, and the rotating shaft 4 rotates the first guide rod 2 and the second guide rod 3 at both ends thereof.

[0048] The front folding member 17, installed below the rear end of the box flap folding mounting frame 1, folds the short box flaps at the front of the packaging box 100 backward. A centering plate 18 is installed at the front end of the front folding member 17. A circularly rotating rear folding member 19 is installed at the rear end of the box flap folding mounting frame 1. The rear folding member 19 is installed on the box flap folding mounting frame 1 via a rotating shaft 20. The rear folding member 19 is driven by a driving assembly 6 via a transmission assembly 5, thereby realizing the cyclic rotation of the rear folding member 19.

[0049] The conventional rear folding member 19 is driven by a cylinder to oscillate back and forth, and its movement is relatively violent and generates large vibrations, which easily damages the rear short box flaps of the carton, making it impossible to close the rear short box flaps or close them tightly, thereby affecting the sealing quality. In this embodiment, the conventional rear folding member 19, which is driven by a cylinder to oscillate back and forth, is improved to a circulating rotating rear folding member 19, which is driven by a motor, reduces vibrations, reduces the damage rate of the rear short box flaps of the carton, and improves the folding stability of the rear short box flaps of the carton.

[0050] In one example of this embodiment, the rotational power of the rear folding member 19 and the rotational power of the first guide rod and the second guide rod are independent power sources, that is, another set of drive assemblies is installed to drive the rotation of the rear folding member 19, and the two sets of drive assemblies are sequentially controlled to achieve synchronization of the operation of the rear folding member and the first guide rod and the second guide rod.

[0051] In a preferred example of this embodiment, the rotational power of the rear folding member 19 and the rotational power of the first guide rod 2 and the second guide rod 3 share a common power source, thereby reducing equipment costs. Synchronous transmission is achieved via the transmission assembly 6, and smooth motion transmission can be achieved by controlling the distance between the rear folding member 19 and the first guide rod 2 and the second guide rod 3. Furthermore, by controlling the transmission ratio between the two, the motions of the two can be synchronized.

[0052] The rear folding member 19 is also driven by a servo motor 11 and a reducer 12, and its operation can be triggered by the position of a sensor or conveyor belt. When used as a standalone box-sealing machine, it is best to use a sensor to trigger the operation. When incorporated into an integrated unpacking, filling, and sealing machine, it is best to use the position of the packaging box 100 conveyor as the trigger. Compared to the conventional reciprocating swing method driven by an air cylinder, it requires less space, has better control over the operation, and provides softer movement, preventing damage to the box flaps.

[0053] In one implementation of this embodiment, the rear folding member 19 has an L-shaped structure, and the surface that contacts the short box flaps of the carton when the rear folding member 19 rotates is an arc surface, which softens the force acting on the rear short box flaps and prevents damage to the rear short box flaps.

[0054] Furthermore, the rear folding member 19 is rotatably arranged between the first mounting plate 13 and the second mounting plate 14, which improves operational stability, reduces vibration, improves the sealing effect of the packaging box 100, and avoids any impact on the packaging box. [Example]

[0055]

[0023] As another preferred embodiment of the present invention, referring to Figures 7, 8, 9 and 10 of the accompanying drawings of the specification, this embodiment provides a box sealing machine, comprising a packing box conveying mechanism 21, a lifting gantry 22, a carton lid folding device and a taping machine core 26, wherein the lifting gantry 22 is disposed above the packing box conveying mechanism 21, the carton lid folding device is attached to the rear of the lifting gantry 22, and the taping machine is disposed in front of the lifting gantry 22.

[0056] The carton lid folding device comprises a box flap folding mounting frame 1, a first guide rod 2, a second guide rod 3, a rotating shaft 4, a drive assembly 5 and a transmission assembly 6. The rotating shaft 4 is rotatably mounted on the box flap folding mounting frame 1, the first guide rod 2 and the second guide rod 3 are arranged in a spiral, and the first guide rod 2 and the second guide rod 3 are fixed to both ends of the rotating shaft 4 by connecting spokes 8 or connecting spoke plates 7, and the first guide rod 2 and the second guide rod 3 are arranged symmetrically. The drive assembly 5 rotates the rotating shaft 4 through the transmission assembly 6, and the rotating shaft 4 rotates the first guide rod 2 and the second guide rod 3 at both ends thereof.

[0057] The front folding member 17, installed below the rear end of the box flap folding mounting frame 1, folds the short box flaps at the front of the packaging box 100 backward. A centering plate 18 is installed at the front end of the front folding member 17. A circularly rotating rear folding member 19 is installed at the rear end of the box flap folding mounting frame 1. The rear folding member 19 is installed on the box flap folding mounting frame 1 via a rotating shaft 20. The rear folding member 19 is driven by a transmission assembly 6 via a transmission assembly 5, thereby realizing the cyclic rotation of the rear folding member 19.

[0058] In one example, the lifting gantry 22 includes a mounting beam, the first mounting support 15 and the second mounting support 16 of the box flap folding mounting frame 1 are fixedly attached to the mounting beam with bolts, and the drive assembly 5 is attached to the mounting beam. Both sides of the mounting beam are supported by lift adjustment assemblies, each including a lift adjustment screw 23, which is rotatably fixed to the frame of the packaging box conveying mechanism 21, and the mounting beam is threadedly engaged with the lift adjustment screw 23. A lift adjustment handle 24 is attached to the top of the lift adjustment screw 23 at one end of the mounting beam, and the lift adjustment screws 23 at both ends of the mounting beam are synchronously transmitted by a transmission chain component. To ensure the stability of the mounting beam, guide rods 25 are further attached to both ends of the mounting beam, and the mounting beam is slidably attached to the guide rods 25.

[0059] The operating principle is as follows: the box conveying mechanism 21 conveys the box 100 to be sealed with a lid forward. As the box conveying mechanism 21 conveys, the short front box flaps of the box 100 come into contact with the front folding members 17, which then fold the short front box flaps backward. The box 100 continues to be conveyed forward together with the box conveying mechanism 21, and the drive assembly 5 rotates the rear folding members 19 90 degrees. The rear folding members 19 come into contact with the short rear box flaps of the box 100 and rotate another 90 degrees to fold the short rear box flaps forward. The long box flaps are located within the spiral range of the first and second guide rods 2 and 3. The drive assembly 5 continues to drive, causing the first and second guide rods 2 and 3 to rotate, and the rear folding members 19 continue to rotate and reset, causing the first and second guide rods 2 and 3 to fold the long box flaps inward to complete the lid sealing. Thereafter, the packaging box 100 is passed through the tape applicator core 26 and subjected to taping processing.

[0060] The lifting gantry 22 can be adjusted to accommodate changes in the height of the packaging box 100. [Explanation of symbols]

[0061] 100...packaging box, 1...box flap folding mounting frame, 2...first guide rod, 3...second guide rod, 4...rotating shaft, 5...drive assembly, 6...transmission assembly, 7...connecting spoke plate, 8...connecting spoke, 9...notch, 10...transmission belt, 11...servo motor, 12...reduction gear, 13...first mounting plate, 14...second mounting plate, 15...first mounting support, 16...second mounting support, 17...front folding member, 18...centering plate, 19...rear folding member, 20...rotating shaft, 21...packaging box conveying mechanism, 22...lifting gantry, 23...lifting adjustment screw, 24...lifting adjustment hand wheel, 25...guide rod, 26...taping machine core

Claims

1. The folding mechanism for a carton comprises a box flap folding mounting frame (1), a first guide rod (2), a second guide rod (3), a rotating shaft (4), a drive assembly (5) and a transmission assembly (6), wherein the rotating shaft (4) is rotatably mounted on the box flap folding mounting frame (1), the first guide rod (2) and the second guide rod (3) are arranged in a spiral, the first guide rod (2) and the second guide rod (3) are fixed to both ends of the rotating shaft (4) via connecting spokes (8) or connecting spoke plates (7), and the first guide rod (2) and the second guide rod (3) are arranged symmetrically, the drive assembly (5) rotates the rotating shaft (4) via the transmission assembly (6), and the rotating shaft (4) rotates the first guide rod (2) and the second guide rod (3) on both sides thereof.

2. As described in claim 1, the carton folding mechanism is characterized in that the first guide rod (2) and the second guide rod (3) are circular rings having a notch (9) when projected along the axis of the rotation shaft (4).

3. As described in claim 1 or 2, the carton folding mechanism is characterized in that the transmission assembly (6) includes a main transmission wheel, a subordinate transmission wheel and a transmission belt (10), the main transmission wheel is assembled to the output shaft of the drive assembly (5), the subordinate transmission wheel is fixed coaxially with the rotating shaft (4), and the transmission belt (10) realizes the transmission between the main transmission wheel and the subordinate transmission wheel.

4. As described in claim 1 or 2, the carton folding mechanism is characterized in that the drive assembly (5) comprises a servo motor (11) and a reducer (12).

5. As described in claim 3, there is provided a paper box folding mechanism, characterized in that the box flap folding mounting frame (1) comprises a first mounting plate (13), a second mounting plate (14), a first mounting support (15) and a second mounting support (16), the first mounting plate (13) is fixedly assembled to the first mounting support (15), the second mounting plate (14) is fixedly assembled to the second mounting support (16), the first mounting plate (13) and the second mounting plate (14) are arranged symmetrically, and a gap is provided between the first mounting plate (13) and the second mounting plate (14).

6. As described in claim 5, the carton folding mechanism is characterized in that the dependent transmission wheel on the rotating shaft (4) is located between the first mounting plate (13) and the second mounting plate (14).

7. A carton lid folding device includes the carton folding mechanism as described in claim 1, characterized in that a front folding member (17) installed below the rear end of the box flap folding mounting frame (1) folds the front short box flaps of the packaging box (100) backward, a rear folding member (19) that rotates in a circular motion is installed at the rear end of the box flap folding mounting frame (1), the rear folding member (19) is installed on the box flap folding mounting frame (1) via a rotating shaft (20), and the rear folding member (19) is driven by a driving assembly (5) via a transmission assembly (6) to realize the cyclic rotation of the rear folding member (19).

8. As described in claim 7, the paper box lid folding device is characterized in that the rear folding member (19) has an L-shaped structure, and the surface that comes into contact with the short box flap of the paper box when the rear folding member (19) rotates is an arc surface.

9. As described in claim 7 or 8, the paper box lid folding device is characterized in that the rear folding member (19) is arranged between the first mounting plate (13) and the second mounting plate (14) of the box flap folding mounting frame (1).

10. The sealing machine comprises a packaging box conveying mechanism (21), a lifting gantry (22), and the paper box lid folding device and tape applicator core (26) as described in claim 7, characterized in that the lifting gantry (22) is disposed above the packaging box conveying mechanism (21), the paper box lid folding device is attached to the rear side of the lifting gantry (22), and the tape applicator is disposed in front of the lifting gantry (22).

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