Carton folding conveying device

Abstract

The present invention discloses a carton folding conveyor device, comprising a frame with a carton folding area within the frame, an inlet and two outlets formed on the frame, a push mechanism for pushing cartons out of the outlets, and two sets of folding swing arm mechanisms and two sets of folding guide mechanisms provided on the frame above the carton folding area. The folding swing arm mechanisms include a first swing arm cylinder and a folding arm connected to the first swing arm cylinder; the folding guide mechanisms include a vertical lift cylinder and a guide plate connected to the vertical lift cylinder; a carton conveyor belt is provided next to each outlet, and an article conveyor belt is provided on the side of each carton conveyor belt away from the carton folding machine. A pressure bar is provided below the article conveyor belt to hold down the folded articles after bending. The device solves the problem of low efficiency in loading goods into existing cartons. By pre-bending the flaps on one side of the carton, the height difference between the article conveyor belt and the carton is reduced, thereby shortening the path required for the robot arm to move during assembly and improving cargo loading efficiency.

Description

Technical Field

[0001] The invention relates to packaging equipment, in particular to a carton folding and conveying device. Background Art

[0002] When loading cartons, one end is typically sealed, while the other end is flapped open and held upright. Once all the goods are loaded, a robot bends the flap toward the center of the carton and seals it with tape. However, during the loading process, because the flap is in a vertical position, the conveyor belt is taller than the combined height of the carton and flap. This results in a significant amount of wasted travel when the robot loads the items into the carton, reducing packing efficiency. Summary of the Invention

[0003] The object of the present invention is to provide a carton folding and conveying device that can effectively solve the problem of low efficiency when loading goods into existing cartons.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] A carton folding conveyor device for conveying cartons, comprising a frame, a carton folding area being provided within the frame, an inlet and two outlets communicating with the carton folding area being formed on the frame, the two outlets being arranged opposite each other, a pushing mechanism being provided within the frame for pushing the carton out of the outlet, two sets of folding swing arm mechanisms and two sets of folding guide mechanisms being provided on the frame above the carton folding area, one set of folding swing arm mechanisms and one set of folding guide mechanisms corresponding to each outlet, the folding swing arm mechanism comprising a first swing arm cylinder and a folding arm connected to the first swing arm cylinder, the folding arm swinging in a vertical plane and the swinging direction being tangential to the carton output direction, the folding arm folding and bending the carton on the side close to the outlet;

[0006] The folding guide mechanism includes a vertical lifting cylinder and a guide plate connected to the vertical lifting cylinder, one end of the guide plate extends from the outlet to the carton folding area, and one end of the guide plate is provided with a first guide portion bent downward; a carton conveyor belt is provided next to each outlet, and an article conveyor belt is provided on the side of each carton conveyor belt away from the carton folding machine, the horizontal height of the article conveyor belt is higher than the horizontal height of the carton conveyor belt, and a pressure rod is provided under the article conveyor belt to press the folded pages after bending, and the pressure rod is arranged along the length direction of the article conveyor belt.

[0007] Preferably, the first swing arm cylinders of the two sets of folding arm mechanisms are respectively fixed to the racks above the corresponding outlets. Since the flaps of the carton near the outlet are the flaps that need to be bent, fixing the first swing arm cylinders of the folding arm mechanism to the racks above the outlet can shorten the length of the folding arm, allowing the folding arm to bend the flaps to the appropriate angle as much as possible.

[0008] Preferably, the vertical lift cylinder comprises a cylinder body and a piston, the cylinder body being fixed to the frame, the end of the piston being fixedly connected to a connecting plate, the connecting plate being connected to a guide plate, the connecting plate also being provided with an upwardly extending guide rod, and the frame being provided with a guide sleeve that cooperates with the guide rod. Due to the long guide plate, a guide rod and guide sleeve are added to ensure smooth vertical movement of the guide plate, thereby ensuring a more stable trajectory of the guide plate during vertical movement.

[0009] Preferably, the frame is further provided with a carton positioning mechanism, comprising a positioning cylinder and a positioning plate. The positioning cylinder is fixed to the frame, and when the positioning cylinder drives the positioning plate to extend into the carton folding area, the positioning plate blocks the carton from the exit. The carton positioning mechanism is provided to position the carton entering the carton folding area and to correct the position of the carton entering the carton folding area, allowing the folding arm to more accurately bend the carton flaps to the appropriate angle when swinging and folding.

[0010] Preferably, a set of carton positioning mechanisms is provided on both sides of each of the exits. The positioning cylinders of one set of carton positioning mechanisms drive the positioning plates to extend vertically into the carton folding area, while the positioning cylinders of the other set of carton positioning mechanisms drive the positioning plates to extend horizontally into the carton folding area. Since the frame is provided with two exits, four sets of carton positioning mechanisms can accurately position and correct the carton's position. Furthermore, the two sets of carton positioning mechanisms on the same side extend into the carton folding area along different trajectories, which can accommodate a wider range of carton position deviations and ensure that the carton position is corrected as much as possible.

[0011] Preferably, the other end of the guide plate is located within the carton folding area and is provided with an upwardly tilted second guide portion. The upward tilt of the second guide portion prevents the pressure plate on the other side of the outlet from being damaged during the downward pressure of the guide plate. The second guide portion slightly bends the flap outward when it contacts the flap on the other side of the outlet, preventing the flap from bending inward and affecting the placement of the items, and also preventing the flap from being compressed into multiple sections, which would cause difficulties in subsequent packaging.

[0012] Preferably, the pushing mechanism includes a pushing cylinder, a pushing block and a pushing guide rail, the pushing guide rail is arranged on the frame between the two outlets, the pushing block is slidably arranged on the pushing guide rail, and the pushing cylinder is driven on the frame and drives the pushing block to slide along the pushing guide rail.

[0013] Preferably, a folding leaf straightening mechanism is provided on the frame adjacent to each of the exits. The folding leaf straightening mechanism includes a second swing arm cylinder and a straightening rocker. The second swing arm cylinder drives the straightening rocker to swing in a plane non-parallel to the direction in which the carton is removed. The second swing arm cylinder drives the straightening rocker to straighten the folding leaf on the side of the carton away from the article conveyor belt, thereby preventing the folding leaf from colliding with the frame after the carton is moved onto the carton conveyor belt and causing damage.

[0014] Preferably, a blocking mechanism is provided on a frame located adjacent to the entrance. The blocking mechanism comprises a blocking cylinder and a blocking plate. The blocking cylinder drives the blocking plate to reciprocate to control the opening and closing of the entrance to the carton folding area. The blocking cylinder controls the number of cartons entering the carton folding area, preventing multiple cartons from entering the area and ensuring orderly folding of cartons within the area.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] A carton folding conveying device for conveying cartons, comprising a frame, a carton folding area is provided in the frame, an inlet and two outlets communicating with the carton folding area are opened on the frame, the two outlets are arranged opposite to each other, a pushing mechanism for pushing the carton out of the outlet is provided in the frame, two groups of folding swing arm mechanisms and two groups of folding guide mechanisms are provided on the frame above the carton folding area, each outlet corresponds to a group of folding swing arm mechanisms and a group of folding guide mechanisms, the folding swing arm mechanism comprises a first swing arm cylinder and a folding arm connected to the first swing arm cylinder, the folding arm swings in a vertical plane and the swing direction is the same as that of the carton output The folding arm folds and bends the carton near the exit in a tangential direction. The folding guide mechanism includes a vertical lifting cylinder and a guide plate connected to the vertical lifting cylinder. One end of the guide plate extends from the exit to the carton folding area, and one end of the guide plate is provided with a first guide portion that is bent downward. A carton conveyor belt is provided next to each exit, and an article conveyor belt is provided on the side of each carton conveyor belt away from the carton folding machine. The horizontal height of the article conveyor belt is higher than that of the carton conveyor belt. A pressure rod is provided below the article conveyor belt to press down the folded leaves after bending. The pressure rod is arranged along the length of the article conveyor belt. The folding arm bends the carton near the article conveyor belt, reducing the height difference between the article conveyor belt and the carton, thereby solving the problem of low efficiency when loading goods into existing cartons. Two exits are set in the carton folding area, which can push cartons to the carton conveyor belts on the left and right sides respectively, thereby improving the carton output efficiency. The first swing arm cylinder is used to drive the folding arm to swing, and the folding leaf on one side of the carton is bent by the folding arm, and then the carton is withdrawn from the frame by the pushing mechanism. During the pushing process, the folding leaf can always be kept in a bent state by the guide plate, and finally the folding leaf is guided under the pressure bar under the item conveyor belt, and the folding leaf is always kept in a bent state by the pressure bar during the packing process. Through the above-mentioned carton folding conveying device, cartons can be transported to two carton conveyor belts, and the spacing between cartons on each carton conveyor belt can be maintained. At the same time, since the folding leaf on one side of the carton is bent in advance, the height difference between the item conveyor belt and the carton is reduced, so that the path that the robot arm needs to move during assembly is shortened, thereby improving the cargo loading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of a carton folding and conveying device according to the present invention;

[0018] Figure 2 This is a front view of a carton folding and conveying device according to the present invention;

[0019] Figure 3 The present invention is a three-dimensional frame of a carton folding conveying device Figure 1 ;

[0020] Figure 4 The present invention is a three-dimensional frame of a carton folding conveying device Figure 2 ;

[0021] Figure 5 The present invention is a three-dimensional frame of a carton folding conveying device Figure 3 ;

[0022] Figure 6 This is a front view of a frame in a carton folding and conveying device of the present invention.

[0023] The accompanying drawings are:

[0024] Frame 100, carton folding area 110, guide sleeve 120;

[0025] Pushing mechanism 200, pushing block 210, pushing guide rail 220;

[0026] Folding arm mechanism 300, first arm cylinder 310, folding arm 320;

[0027] Folding guide mechanism 400, vertical lifting cylinder 410, guide plate 420, first guide portion 421, second guide portion 422, connecting plate 430, guide rod 440;

[0028] Carton conveyor belt 500;

[0029] Article conveyor belt 600, pressure bar 610;

[0030] Carton positioning mechanism 700, positioning cylinder 710, positioning plate 720;

[0031] Folding and righting mechanism 800, second swing arm cylinder 810, righting swing rod 820;

[0032] Blocking mechanism 900 , blocking cylinder 910 , and blocking plate 920 . DETAILED DESCRIPTION

[0033] A carton folding conveying device for conveying cartons, comprising a frame, a carton folding area is provided in the frame, an inlet and two outlets communicating with the carton folding area are opened on the frame, the two outlets are arranged opposite to each other, a pushing mechanism for pushing the carton out of the outlet is provided in the frame, two groups of folding swing arm mechanisms and two groups of folding guide mechanisms are provided on the frame above the carton folding area, each outlet corresponds to a group of folding swing arm mechanisms and a group of folding guide mechanisms, the folding swing arm mechanism comprises a first swing arm cylinder and a folding arm connected to the first swing arm cylinder, the folding arm swings in a vertical plane and the swing direction is the same as that of the carton output The folding arm folds and bends the carton near the exit in a tangential direction. The folding guide mechanism includes a vertical lifting cylinder and a guide plate connected to the vertical lifting cylinder. One end of the guide plate extends from the exit to the carton folding area, and one end of the guide plate is provided with a first guide portion that is bent downward. A carton conveyor belt is provided next to each exit, and an article conveyor belt is provided on the side of each carton conveyor belt away from the carton folding machine. The horizontal height of the article conveyor belt is higher than that of the carton conveyor belt. A pressure rod is provided below the article conveyor belt to press down the folded leaves after bending. The pressure rod is arranged along the length of the article conveyor belt. The folding arm bends the carton near the article conveyor belt, reducing the height difference between the article conveyor belt and the carton, thereby solving the problem of low efficiency when loading goods into existing cartons. Two exits are set in the carton folding area, which can push cartons to the carton conveyor belts on the left and right sides respectively, thereby improving the carton output efficiency. The first swing arm cylinder is used to drive the folding arm to swing, and the folding leaf on one side of the carton is bent by the folding arm, and then the carton is withdrawn from the frame by the pushing mechanism. During the pushing process, the folding leaf can always be kept in a bent state by the guide plate, and finally the folding leaf is guided under the pressure bar under the item conveyor belt, and the folding leaf is always kept in a bent state by the pressure bar during the packing process. Through the above-mentioned carton folding conveying device, cartons can be transported to two carton conveyor belts, and the spacing between cartons on each carton conveyor belt can be maintained. At the same time, since the folding leaf on one side of the carton is bent in advance, the height difference between the item conveyor belt and the carton is reduced, so that the path that the robot arm needs to move during assembly is shortened, thereby improving the cargo loading efficiency.

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] See Figure 1 、 Figure 2This is an embodiment of a carton folding and conveying device of the present invention, which is used to convey cartons. The cartons are in the shape of a cube or a rectangular parallelepiped, with an open top and four flaps provided on the four sides of the opening. After packing, the four flaps are bent inward to seal the carton opening. However, before entering the carton folding and conveying device, the four flaps are all arranged vertically. The carton folding and conveying device includes a frame 100, which has a regular quadrangular prism structure. A carton folding area 110 is provided within the frame 100. An inlet is provided on one side of the frame 100, and two outlets are provided on two opposite sides of the frame 100. That is, after a carton enters the carton folding area 110 from the inlet, it can choose to leave the carton folding area 110 from the left or right exit. Carton conveyor belts 500 connected to the exit are provided on both sides of the frame 100. Cartons coming out of the exit directly enter the carton conveyor belt 500 for transportation to the next process. An article conveyor belt 600 is provided on the side of the carton conveyor belt 500 away from the exit. The article conveyor belt 600 mainly transports articles packed in cartons. The carton conveyor belt 500 and the article conveyor belt 600 have the same transportation direction. Articles are grabbed from the article conveyor belt 600 by a robot and placed into cartons.

[0039] In order to control which exit the carton entering the carton folding area 110 is moved out from, a pushing mechanism 200 is provided below the carton folding area 110. The pushing mechanism 200 includes a pushing cylinder, a pushing block 210, and a pushing guide rail 220. The pushing guide rail 220 is arranged along the direction of the line connecting the two exits. The pushing block 210 is slidably arranged on the pushing guide rail 220, and the upper part of the pushing block 210 extends into the carton folding area 110 to push the carton toward one of the exits. The pushing block 210 is controlled to slide by a pushing cylinder fixed to the frame 100. The pushing block 210 has two starting positions on the pushing guide rail 220, which are respectively close to the two exits. When the pushing block 210 moves, it will push the carton toward the other exit, so that the carton is moved out of the carton folding area from the other exit.

[0040] like Figures 3 to 6 As shown, two sets of folding arm mechanisms 300 are provided on the frame 100. The two sets of folding arm mechanisms 300 have the same structure, but have opposite swing directions. The folding arm mechanisms 300 include a first swing arm cylinder 310 and a folding arm 320. The first swing arm cylinder 310 is fixed to the frame 100. The first swing arm cylinder 310 controls the swing of the folding arm 320. The folding arm 320 needs to extend into the carton folding area 110. The carton is folded near the exit and bent away from the center through the folding arm 320. In order to shorten the length of the folding arm 320, the first swing arm cylinder 310 is provided on the frame 100 above the exit, so that when the folding arm 320 swings to the lowest point, it is approximately near the exit, that is, the position where the fold is pressed to a horizontal state.

[0041] After the folding leaf is bent by the folding swing arm mechanism 300, once the pushing mechanism 200 pushes the carton, the folding arm 320 will lose its support for the bent folding leaf, and the bent folding leaf will return to the vertical direction. In order to avoid this situation, the bent folding leaf is always kept in a bent state when the carton is fed into the carton conveyor belt 500. Two sets of folding leaf guide mechanisms 400 are also provided above the frame 100. The folding leaf guide mechanism 400 includes a vertical lifting cylinder 410 and a guide plate 420 connected to the vertical guide cylinder. One end of the guide plate 420 extends out of the carton folding area 110, and one end of the guide plate 420 is provided with a first guide portion 421 bent downward. After the folding arm 320 bends the fold on one side of the carton, the vertical lifting cylinder 410 controls the guide plate 420 to move downward, and the carton is pushed at this time. Even if the fold of the carton loses the support of the folding arm 320, it will be pressed by the guide rod and cannot be turned to a vertical state. As the carton moves out, the bent fold will continue to bend downward under the guidance of the first guide part 421, guiding the bent fold to be inserted under the article conveyor belt 600. When the carton moves on the carton conveyor belt 500, the fold can always be kept in a bent state, which will not interfere with the loading of articles into the carton.

[0042] Since the guide plate 420 has to guide the carton out of the carton folding area 110 all the time, its length will be relatively long. If it relies solely on the cylinder's limit during the up and down movement, it will easily swing or rotate around the cylinder axis. In order to solve this problem, the vertical lifting cylinder 410 includes a cylinder body and a piston. The cylinder body is vertically fixed on the frame 100, and the end of the cylinder is fixedly connected to the connecting plate 430. The guide plate 420 is fixed on the connecting plate 430, and two guide rods 440 extending upward are provided on the connecting plate 430. The frame 100 is provided with a guide sleeve 120 that cooperates with the guide rods 440. Through the cooperation of the guide rods 440 and the guide sleeve 120, the guide plate 420 can be stabilized and will not deviate or flip during the up and down movement of the guide plate 420.

[0043] Of course, as the guide plate 420 is pressed down, the hinge on the other side that needs to be bent may be pressed, causing the hinge on the other side to be crushed or bent toward the inside of the carton. Therefore, the other end of the guide plate 420 is located in the carton folding area 110, and is provided with an upwardly raised second guide portion 422, and the second guide portion 422 is preferably located above the fold on the other side. In this way, when the guide plate 420 is pressed down, the second guide portion 422 contacts the fold on the other side and bends the fold on the other side outward, avoiding interference with the packing of goods and also avoiding crushing the fold on the other side.

[0044] The fold on the other side may also be bent by the guide plate 420 or other components. After the carton is moved out of the rack 100, the fold on the other side will be stuck at the exit. The fold on the other side needs to be completely moved out of the exit before the carton can be transported. This will cause the carton conveyor belt to be some distance away from the rack 100. In order to solve this problem, a fold straightening mechanism 800 is further provided on the rack 100 next to the exit. The fold straightening mechanism 800 includes a second swing arm cylinder 810 and a straightening swing rod 820. The second swing arm cylinder 810 is fixed to the rack 100 and controls the straightening swing rod 820 to swing from bottom to top to straighten the fold on the other side. It is best that the swing plane of the straightening swing rod 820 is perpendicular to the direction in which the carton is moved out.

[0045] In addition, a carton positioning mechanism 700 is provided, which includes a positioning cylinder 710 and a positioning plate 720. The positioning cylinder 710 is fixed to the frame 100. When the positioning cylinder 710 drives the positioning plate 720 to extend into the carton folding area 110, the positioning plate 720 blocks the carton and the outlet. Since the swing arm mechanism bends the folding sheet by swinging, if the carton is empty during the bending and folding process, it may flip over, resulting in an inaccurate folding angle. The positioning plate 720 extends between the outlet and the carton to support the carton during the folding and prevent it from flipping over. Furthermore, there are four groups of carton positioning mechanisms 700, one group is set on both sides of each exit, and the extension trajectories of the positioning plates 720 in the two groups of carton positioning mechanisms 700 next to each exit are different, that is, one group is horizontally extended into the carton folding area 110, and the other group is vertically extended into the carton folding area 110. Such a setting can correct the position of the carton when the carton input position is not correct. Through the four groups of carton positioning mechanisms 700, in addition to correcting the position of the carton, the carton can also be clamped during bending and folding to further prevent the carton from flipping over.

[0046] In addition, a blocking mechanism 900 can be set on the frame 100 next to the entrance. The blocking mechanism 900 includes a blocking cylinder 910 and a blocking plate 920. The blocking cylinder 910 drives the blocking plate 920 to block the path of the carton entering the entrance, thereby controlling the opening and closing of the entrance. Through the blocking mechanism 900, when there are cartons in the carton folding area 110, subsequent cartons are blocked from entering, preventing subsequent straight lines from colliding with the cartons in the carton folding area 110, causing the cartons in the carton folding area 110 to be displaced.

[0047] During operation, a carton enters the entrance of the carton folding area 110. After the carton enters, the blocking cylinder 910 of the blocking mechanism 900 is activated, driving the blocking plate 920 to extend, closing the entrance. Then, based on the position of the pushing block 210 of the pushing mechanism 200, the folding swing arm mechanism 300 on the other side is selected for activation. For example, if the pushing block 210 is close to the left exit, the folding swing arm mechanism 300 close to the right exit is activated, and vice versa. In this embodiment, the initial position of the pushing block 210 is on the left, and the carton needs to be pushed out from the right exit. After the carton is located in the carton folding area 110, the four carton positioning mechanisms 700 are started, and the four positioning plates 720 extend into the carton folding area 110 and abut against the carton to position the carton to prevent the carton from flipping over during folding. Then the folding swing arm structure near the right exit is started, and the first swing arm cylinder 310 drives the folding arm 320 to swing downward. The swinging direction of the folding arm 320 is parallel to the direction in which the carton moves out. The folding leaf of the carton near the right exit is bent by the folding arm 320. Then the first guide part 421 extends out of the right exit and the folding guide mechanism 400 is started. The vertical lifting cylinder 410 drives the guide plate 420 to move downward. The guide plate 420 connects to the folding arm 320 to press the folding leaf on the right side of the carton. Then the first swing arm cylinder 310 drives the folding arm 320 to return to its position. The four positioning plates 720 of the positioning mechanism 700 withdraw from the carton folding area 110, and the push cylinder is started, driving the pushing block 210 to move from the left outlet to the right outlet, thereby pushing the carton out of the right outlet and allowing the carton to enter the carton conveyor belt 500 on the right. During this pushing process, the folding leaf on the right side of the carton is guided by the guide plate 420 and extended under the pressure rod 610 under the right article conveyor belt 600. The folding leaf on the right side of the carton is pressed by the pressure rod 610, and the second swing arm cylinder 810 of the folding leaf straightening mechanism 800 is started, driving the straightening rod to swing from bottom to top, straightening the folding leaf on the left side of the carton to a vertical state, allowing the carton to be completely moved out of the outlet. Finally, the carton conveyor belt 500 transports the carton away. During the transportation process, the robot puts the items on the article conveyor belt 600 into the carton. After the carton is moved out of the carton folding area 110, the folding guide mechanism 400 returns to its original position, and the blocking plate 920 of the blocking mechanism 900 is removed, opening the entrance. A carton is then placed in and positioned, folded, and then moved out of the left exit and onto the left carton conveyor belt 500. This carton folding and conveying device shortens the vertical distance between the article conveyor belt 600 and the carton, shortening the path for the robot to move articles, speeding up the robot's loading of articles, and improving loading efficiency.

[0048] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the scope of the present invention are included in the patent scope of the present invention.

Claims

1. A carton folding conveying device for conveying cartons, characterized in that: The machine comprises a frame, wherein a carton folding area is provided in the frame, an inlet and two outlets communicating with the carton folding area are formed on the frame, and the two outlets are arranged opposite to each other. A pushing mechanism for pushing the carton out of the outlet is provided in the frame, and two groups of folding swing arm mechanisms and two groups of folding guide mechanisms are provided on the frame above the carton folding area, and each outlet corresponds to a group of folding swing arm mechanisms and a group of folding guide mechanisms. The folding swing arm mechanism includes a first swing arm cylinder and a folding arm connected to the first swing arm cylinder. The folding arm swings in a vertical plane and the swinging direction is tangent to the carton output direction. The folding arm folds and bends the carton on the side close to the outlet; The folding guide mechanism includes a vertical lifting cylinder and a guide plate connected to the vertical lifting cylinder, one end of the guide plate extends from the outlet to the carton folding area, and one end of the guide plate is provided with a first guide portion bent downward; a carton conveyor belt is provided next to each outlet, and an article conveyor belt is provided on the side of each carton conveyor belt away from the carton folding machine, the horizontal height of the article conveyor belt is higher than the horizontal height of the carton conveyor belt, and a pressure rod is provided below the article conveyor belt to press the folded sheets after bending, and the pressure rod is arranged along the length direction of the article conveyor belt; A folding and straightening mechanism is provided on the frame beside each of the outlets. The folding and straightening mechanism includes a second swing arm cylinder and a straightening rocker. The second swing arm cylinder drives the straightening rocker to swing in a plane that is not parallel to the direction in which the carton is moved out.

2. A carton folding and conveying device according to claim 1, characterized in that: The first swing arm cylinders of the two groups of folding swing arm mechanisms are respectively fixed on the racks above the corresponding outlets.

3. A carton folding and conveying device according to claim 1, characterized in that: The vertical lifting cylinder includes a cylinder body and a piston. The cylinder body is fixed on the frame. The end of the piston is fixedly connected to the connecting plate. The connecting plate is connected to a guide plate. The connecting plate is also provided with a guide rod extending upward. The frame is provided with a guide sleeve that cooperates with the guide rod.

4. A carton folding and conveying device according to claim 1, characterized in that: The frame is also provided with a carton positioning mechanism, which includes a positioning cylinder and a positioning plate. The positioning cylinder is fixed on the frame. When the positioning cylinder drives the positioning plate to extend into the carton folding area, the positioning plate blocks the carton and the outlet.

5. A carton folding and conveying device according to claim 4, characterized in that: A group of carton positioning mechanisms is provided on both sides of each of the outlets, wherein the positioning cylinders of one group of carton positioning mechanisms drive the positioning plates to extend into the carton folding area in the vertical direction, and the positioning cylinders of the other group of carton positioning mechanisms drive the positioning plates to extend into the carton folding area in the horizontal direction.

6. A carton folding and conveying device according to claim 1, characterized in that: The other end of the guide plate is located in the carton folding area and is provided with a second guide portion that tilts upward.

7. The carton folding and conveying device according to claim 1, characterized in that: The pushing mechanism includes a pushing cylinder, a pushing block and a pushing guide rail. The pushing guide rail is arranged on the frame between the two outlets. The pushing block is slidably arranged on the pushing guide rail. The pushing cylinder is driven on the frame and drives the pushing block to slide along the pushing guide rail.

8. The carton folding and conveying device according to claim 1, characterized in that: A blocking mechanism is provided on a frame located beside the inlet. The blocking mechanism comprises a blocking cylinder and a blocking plate. The blocking cylinder drives the blocking plate to move back and forth to control the opening and closing of the inlet of the carton folding area.

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