Production line finished carton conveying and stacking mechanism

Abstract

The invention discloses a production line finished carton conveying and stacking mechanism, and belongs to the technical field of carton production, the production line finished carton conveying and stacking mechanism comprises a folding mechanism and a front conveying mechanism mounted on one side of the folding mechanism, and a rear conveying mechanism is assembled on one side of the front conveying mechanism; by means of the rear conveying mechanism and the stacking unit, efficient connection and stable treatment of the carton conveying and stacking process are achieved, after the folding mechanism completes folding of the carton, the folded carton is stably conveyed to the conveying unit through the front conveying mechanism, in the process, a telescopic limiting belt applies pressing force to the carton, and the carton is conveyed to the stacking unit through the rear conveying mechanism. Meanwhile, the two ends of the belt body are stably fixed to ensure the continuity and reliability of the pressing effect, then stacking is conducted through the stacking unit, the whole stacking process is circulated, stable pressing of cartons in the conveying process is ensured, and the conveying efficiency of the cartons is improved. And the risk that the stacked cartons topple due to center-of-gravity shift is avoided in an overall vertical lifting mode.

Description

Technical Field

[0001] The present invention relates to the technical field of carton production, and in particular to a conveying and stacking mechanism for finished carton products on a production line. Background Art

[0002] As an indispensable part of modern logistics, cartons bear the important responsibilities of containing, protecting products and making them beautiful. Commonly used cartons are three-layer and five-layer, and seven-layer are less used. Each layer is divided into lining paper, corrugated paper, core paper and face paper. The lining and face paper are tea board paper and kraft paper, and the core paper is corrugated paper. The color and feel of various papers are different, and the papers produced by different manufacturers are also different. According to the materials used, there are corrugated boxes, single-layer cardboard boxes, etc., with various specifications and models.

[0003] The process for producing cartons is also relatively mature, that is, most of them are automatically produced on assembly lines. After production, the cartons are folded into sheets by a folding mechanism, and then moved to the stacking mechanism through a conveying mechanism for stacking, so as to save space and facilitate subsequent transportation and storage.

[0004] In the process of cartons being conveyed to the stacking mechanism for stacking through the conveying mechanism, in order to prevent the cartons from unfolding by themselves during stacking, the traditional method often adopts placing the cartons to be stacked under the bottom layer of the stacked cartons. This method can effectively prevent the cartons from flattening by themselves during stacking. However, in actual operation, this stacking method requires that one side of the stacked carton group be continuously and gently lifted so that new cartons can be inserted under the lifted gap. In this process, as the stacking height increases, even if a supporting component is provided on the top to support the top of the carton group, the carton group will still gradually tilt to one side due to the shift of the center of gravity. Finally, after reaching a certain height, it will unexpectedly tip over, seriously interfering with the smooth conveying and stacking of subsequent cartons. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that in actual operation, this stacking method requires constantly lifting one side of the stacked carton group gently so that new cartons can be inserted under the lifted gap. During this process, as the stacking height increases, even if a supporting component is provided on the top to support the top of the carton group, the carton group will still gradually tilt to one side due to the shift of the center of gravity, and eventually after reaching a certain height, it will unpredictably tip over, seriously interfering with the smooth conveying and stacking of subsequent cartons. A production line finished carton conveying and stacking mechanism is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A finished carton conveying and stacking mechanism for a production line comprises a folding mechanism and a front conveying mechanism installed on one side of the folding mechanism, a rear conveying mechanism is installed on one side of the front conveying mechanism, a stacking unit is installed on the rear conveying mechanism, and a pushing unit is installed on the side of the rear conveying mechanism close to the stacking unit;

[0008] The rear conveying mechanism comprises a conveying unit, and the front conveying mechanism and the conveying unit are overlapped with a telescopic limiting belt;

[0009] The stacking unit comprises two mounting frames, one end of one of the mounting frames is fixed with a connecting seat, the connecting seat is rotatably connected with a first telescopic connecting rod, one end of the other mounting frame is fixed with a vertical holding tube, a vertical lifting unit is installed in the vertical holding tube, both ends of the first telescopic connecting rod are connected to the vertical lifting unit, and the other mounting frame is equipped with a power unit;

[0010] When the conveying unit is running, it can drive the power unit to operate. The vertical lifting unit is driven by the power unit to first move forward horizontally, and then lift up vertically to transport the carton onto the push-out unit. When the newly transported carton on the rear conveying mechanism enters the push-out unit, the vertical lifting unit moves backward until it is no longer in contact with the carton, and then moves downward to a position lower than the lower surface of the carton at the bottom. At this time, the above operation is repeated to stack the continuously transported cartons.

[0011] As a further description of the above technical solution:

[0012] The conveying unit includes a frame, the frame is rotatably connected to multiple rollers, the rollers are equipped with conveyor belts, one end of the roller passing through the frame is fixed with a pulley, the pulley is equipped with a synchronous belt, a mounting seat is fixed on one side of the frame, a motor is fixed on the mounting seat, and the output end of the motor is connected to one of the pulleys.

[0013] As a further description of the above technical solution:

[0014] The push-out unit comprises a mounting plate, a plurality of vertical rods are fixed on the frame, the top ends of the plurality of vertical rods are commonly fixedly connected to the mounting plate, a plurality of sleeves are fixed to the lower surface of the mounting plate, a square rod is inserted into the sleeve, a first spring is fixed to the top end of the square rod, the top end of the first spring is fixed to the inner top wall of the sleeve, and a pressure plate is commonly fixed to the bottom ends of the plurality of square rods;

[0015] A horizontal plate is fixed to the inner side of two of the vertical rods, and an electric hydraulic push rod is installed on the horizontal plate. A push plate for pushing the stacked cartons to one side is fixed to one end of the piston rod of the electric hydraulic push rod. A pull rod is fixed to one side of the other two vertical rods, and a bundling table is fixed to one end of the two pull rods, and one end of the bundling table is fixed to the frame.

[0016] As a further description of the above technical solution:

[0017] The power unit includes a mounting rod fixed on another mounting frame, an axial rod rotatably connected inside the mounting rod, an eccentric wheel fixed to one end of the axial rod, and pulleys fixed to the other end of the axial rod and one end of one of the pulleys, and a transmission belt is meshed with the two pulleys.

[0018] As a further description of the above technical solution:

[0019] The vertical lifting unit comprises a vertical moving rod inserted into the vertical holding tube, a sliding seat is fixed to the bottom end of the vertical moving rod, and a transverse telescopic moving member is slidably mounted in the sliding seat;

[0020] A retaining member matched with the eccentric wheel is fixed to the top end of the vertical moving rod, the eccentric wheel is rotatably connected in the retaining member, a connecting plate is fixed to one end of the eccentric wheel, a telescopic cam member is mounted on the connecting plate, one end of the telescopic cam member is rotatably connected to a second telescopic link, and the other end of the second telescopic link is rotatably connected to the top end of the first telescopic link;

[0021] A rotating seat is fixed to one end of the transverse telescopic moving member, a third telescopic connecting rod is rotatably connected in the rotating seat, and the other end of the third telescopic connecting rod is rotatably connected to the bottom end of the first telescopic connecting rod.

[0022] As a further description of the above technical solution:

[0023] A cross bar is fixedly mounted on the inner sides of the two vertical bars, an auxiliary frame is fixed on the inner side of the cross bar, the bottom of the auxiliary frame is overlapped with the upper surface of the frame, and the upper surface of the auxiliary frame is in the same horizontal plane as the upper surface of the conveyor belt;

[0024] A limiting slide groove is provided on the inner side of the auxiliary frame, a limiting slider matched with the limiting slide groove is fixed on one side of the pressure plate, the pressure plate is slidably assembled on the auxiliary frame through the limiting slider, and an insertion groove corresponding to the transverse telescopic moving part is provided on the inner bottom wall of the auxiliary frame.

[0025] As a further description of the above technical solution:

[0026] The telescopic limiting belt includes a first belt body, one end of which is connected to a folding mechanism, a second belt body is fixed to one end of the transverse telescopic movable member, an extension belt is fixed to one end of the second belt body, a storage cavity matched with the extension belt is provided at the other end of the first belt body, the extension belt is inserted into the storage cavity, a second spring is fixed to one end of the extension belt, one end of the second spring is fixed to a side wall of the storage cavity, and a long groove corresponding to the third telescopic connecting rod is provided on the second belt body.

[0027] As a further description of the above technical solution:

[0028] The transverse telescopic moving part includes a main moving part slidably assembled in a sliding seat, a slot is provided in the main moving part, an insertion part is inserted in the slot, a knob stud is threadedly passed through the lower surface of the main moving part, one end of the knob stud inserted into the slot abuts against the insertion part, so that the insertion part is fixed in the main moving part after being pulled out.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] The rear conveying mechanism and stacking unit are set up to achieve efficient connection and stable processing of the carton conveying and stacking process. When the folding mechanism completes the folding of the carton, the folded carton is then smoothly conveyed to the conveying unit by the front conveying mechanism. During this process, the telescopic limiting belt applies a pressing force to the carton to effectively prevent it from unfolding on its own during transportation. At the same time, the firm fixation of both ends of the belt body ensures the continuity and reliability of the pressing effect.

[0031] As the first carton arrives at the preset position of the stacking unit, the power unit drives the transverse telescopic moving part to first move horizontally toward the auxiliary frame, then rise vertically, and simultaneously lift the pressing plate to create an unobstructed entry channel for the carton. Under the guidance of the conveying unit, the carton slides into the supporting surface of the auxiliary frame. At this time, the transverse telescopic moving part retreats in time to avoid contact with the carton, and then moves down to a position below the lower surface of the bottom carton. At the same time, the pressing plate quickly resets under the help of the spring, pushing the newly added carton close to the auxiliary frame, completing a stacking action;

[0032] The entire stacking process is repeated over and over, which not only ensures the stable pressing of the cartons during transportation, but also avoids the risk of stacked cartons tipping over due to shift of the center of gravity by lifting the entire cartons vertically, significantly improving the stacking efficiency and stability. Even if the stacking height of the cartons continues to increase, the stability of the overall structure can be maintained, ensuring the normal transportation and stacking of subsequent cartons. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of a three-dimensional structure provided according to an embodiment of the present invention is shown;

[0034] Figure 2 A schematic structural diagram of a conveying unit provided according to an embodiment of the present invention is shown;

[0035] Figure 3 It shows a schematic structural diagram of a push-out unit provided according to an embodiment of the present invention;

[0036] Figure 4 It shows a schematic diagram of the structure of the stacking unit after adjustment according to an embodiment of the present invention;

[0037] Figure 5 It shows a schematic structural diagram of a telescopic limiting band provided according to an embodiment of the present invention;

[0038] Figure 6 The embodiment of the present invention provides Figure 3 The enlarged structural diagram at A in the middle;

[0039] Figure 7 The embodiment of the present invention provides Figure 5 The enlarged structural diagram at B in the middle;

[0040] Figure 8 A schematic structural diagram of a transverse telescopic moving member provided according to an embodiment of the present invention is shown.

[0041] Legend:

[0042] 10. Folding mechanism;

[0043] 20. Front conveying mechanism;

[0044] 30. rear conveying mechanism; 31. conveying unit; 311. frame; 312. roller shaft; 313. pulley;

[0045] 314, synchronous belt; 315, conveyor belt; 316, motor; 32, telescopic limiting belt; 321, first belt body;

[0046] 322, second belt body; 323, extension belt;

[0047] 40. stacking unit; 41. mounting frame; 42. connecting seat; 43. first telescopic link; 44. vertical holding tube; 45. vertical lifting unit; 451. vertical moving rod; 452. sliding seat; 453. transverse telescopic moving member; 4531. main moving member; 4532. insertion member; 454. holding member; 455. connecting plate; 456. telescopic cam member; 457. second telescopic link; 458. third telescopic link; 46. power unit; 461. erection rod; 462. shaft rod; 463. eccentric wheel; 464. pulley; 465. transmission belt;

[0048] 50. Push-out unit; 51. Mounting plate; 52. Vertical rod; 53. Sleeve; 54. Square rod; 55. First spring; 56. Press plate; 57. Electric hydraulic push rod; 58. Push plate; 59. Bundling table; 510. Auxiliary frame; 511. Insertion slot. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] like Figure 1 - Figure 8 As shown, the present invention provides:

[0051] A finished carton conveying and stacking mechanism for a production line comprises a folding mechanism 10 and a front conveying mechanism 20 installed on one side of the folding mechanism 10, a rear conveying mechanism 30 is installed on one side of the front conveying mechanism 20, a stacking unit 40 is installed on the rear conveying mechanism 30, and a push-out unit 50 is installed on one side of the rear conveying mechanism 30 close to the stacking unit 40;

[0052] The rear conveying mechanism 30 includes a conveying unit 31, and a telescopic limiting belt 32 is overlapped on the front conveying mechanism 20 and the conveying unit 31;

[0053] The stacking unit 40 includes two mounting frames 41, one end of one mounting frame 41 is fixed with a connecting seat 42, the connecting seat 42 is rotatably connected with a first telescopic connecting rod 43, one end of the other mounting frame 41 is fixed with a vertical holding tube 44, a vertical lifting unit 45 is installed in the vertical holding tube 44, both ends of the first telescopic connecting rod 43 are connected to the vertical lifting unit 45, and the other mounting frame 41 is equipped with a power unit 46;

[0054] When the conveying unit 31 is in operation, it can drive the power unit 46 to operate. Driven by the power unit 46, the vertical lifting unit 45 first moves forward horizontally, and then lifts up vertically to transport the carton onto the ejection unit 50. While the newly transported carton on the rear conveying mechanism 30 enters the ejection unit 50, the vertical lifting unit 45 moves backward until it is no longer in contact with the carton, and then moves downward to a position lower than the lower surface of the carton at the bottom. At this time, the above operation is repeated to stack the continuously transported cartons.

[0055] like Figure 1 and Figure 2As shown, the conveying unit 31 includes a frame 311, the frame 311 is rotatably connected to a plurality of rollers 312, a conveying belt 315 is mounted on the rollers 312, a pulley 313 is fixed to one end of the rollers 312 that passes through the frame 311, a synchronous belt 314 is mounted on the pulley 313, a mounting seat is fixed to one side of the frame 311, a motor 316 is fixed to the mounting seat, and an output end of the motor 316 is connected to one of the pulleys 313;

[0056] Preferably, tension wheels are provided on the upper and lower surfaces of the synchronous belt 314 , and one end of the tension wheel is rotatably connected to the frame 311 . Through the provision of the tension wheel, the synchronous belt 314 and each pulley 313 can always maintain a meshing state.

[0057] like Figure 1 , Figure 5 and Figure 7 As shown, the telescopic limiting belt 32 includes a first belt body 321, one end of the first belt body 321 is connected to the folding mechanism 10, one end of the transverse telescopic moving member 453 is fixed with a second belt body 322, one end of the second belt body 322 is fixed with an extension belt 323, the other end of the first belt body 321 is provided with a storage cavity adapted to the extension belt 323, the extension belt 323 is inserted into the storage cavity, one end of the extension belt 323 is fixed with a second spring, one end of the second spring is fixed to a side wall of the storage cavity, and the second belt body 322 is provided with a long groove corresponding to the third telescopic connecting rod 458;

[0058] Through the telescopic design, the second belt body 322 can move along with the movement of the transverse telescopic moving member 453, and when resetting, it is restored by the pulling force of the second spring.

[0059] like Figure 2 , Figure 3 and Figure 4 As shown, the power unit 46 includes a mounting rod 461 fixed on another mounting frame 41, a shaft 462 is rotatably connected inside the mounting rod 461, an eccentric wheel 463 is fixed to one end of the shaft 462, a pulley 464 is fixed to the other end of the shaft 462 and one end of one of the pulleys 313, and a transmission belt 465 is meshed with the two pulleys 464;

[0060] When the conveying unit 31 is running, two of the pulleys 313 on both sides drive the pulley 464 installed on the surface thereof to rotate, and drive another pulley 464 to rotate through the transmission belt 465, so that the shaft 462 at the end of the pulley 464 drives the eccentric wheel 463 to rotate. After the eccentric wheel 463 rotates, it drives the vertical moving rod 451 to move up and down in the vertical retaining tube 44 through the retaining member 454.

[0061] like Figure 4 and Figure 8 As shown, the vertical lifting unit 45 includes a vertical moving rod 451 inserted into the vertical holding tube 44, a slide seat 452 is fixed to the bottom end of the vertical moving rod 451, and a transverse telescopic moving member 453 is slidably mounted in the slide seat 452;

[0062] A retaining member 454 adapted to the eccentric wheel 463 is fixed to the top of the vertical moving rod 451, and the eccentric wheel 463 is rotatably connected in the retaining member 454. A connecting plate 455 is fixed to one end of the eccentric wheel 463, and a telescopic cam member 456 is mounted on the connecting plate 455. One end of the telescopic cam member 456 is rotatably connected to a second telescopic link 457, and the other end of the second telescopic link 457 is rotatably connected to the top of the first telescopic link 43.

[0063] A rotating seat is fixed to one end of the transverse telescopic moving member 453, and a third telescopic link 458 is rotatably connected in the rotating seat. The other end of the third telescopic link 458 is rotatably connected to the bottom end of the first telescopic link 43;

[0064] When the eccentric wheel 463 rotates, the connecting disk 455 at its end rotates therewith, thereby causing the telescopic cam member 456 to rotate, and then driving the first telescopic link 43 to swing through the second telescopic link 457. During the swinging process, the third telescopic link 458 drives the transverse telescopic moving member 453 to reciprocate in the horizontal direction, and cooperates with the vertical moving rod 451, so that the transverse telescopic moving member 453 can reciprocate in the horizontal direction and move up and down in the vertical direction at the same time, thereby continuously lifting and lowering the stacked cartons in the vertical direction, so that the cartons can be stacked without tipping over.

[0065] like Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, the transverse telescopic moving member 453 includes a main moving member 4531 slidably assembled in the slide seat 452, a slot is provided in the main moving member 4531, an insertion member 4532 is inserted in the slot, a knob stud is threadedly penetrated through the lower surface of the main moving member 4531, one end of the knob stud penetrated into the slot abuts against the insertion member 4532, so that the insertion member 4532 is fixed in the main moving member 4531 after being pulled out;

[0066] After the knob stud is loosened, the insertion member 4532 can be pulled outward, so that the main moving member 4531 exceeds the portion of the slide 452 and the extended portion of the frame insertion member 4532 can adapt to the width of the carton.

[0067] like Figure 1 , Figure 2 , Figure 3 and Figure 8As shown, the push-out unit 50 includes a mounting plate 51, a plurality of vertical rods 52 are fixed on the frame 311, the top ends of the plurality of vertical rods 52 are commonly fixedly connected to the mounting plate 51, a plurality of sleeves 53 are fixed to the lower surface of the mounting plate 51, a square rod 54 is inserted in the sleeve 53, a first spring 55 is fixed to the top end of the square rod 54, the top end of the first spring 55 is fixed to the inner top wall of the sleeve 53, a pressing plate 56 is commonly fixed to the bottom ends of the plurality of square rods 54, wherein a transverse plate is commonly fixed to the inner sides of two vertical rods 52, an electric hydraulic push rod 57 is mounted on the transverse plate, a push plate 58 for pushing the stacked cartons to one side is fixed to one end of the piston rod of the electric hydraulic push rod 57, a pull rod is fixed to one side of the other two vertical rods 52, a bundling table 59 is commonly fixed to one end of the two pull rods, and one end of the bundling table 59 is fixed to the frame 311;

[0068] The inner sides of the two vertical rods 52 are fixed with a cross bar, and the inner side of the cross bar is fixed with an auxiliary frame 510, the bottom of the auxiliary frame 510 overlaps the upper surface of the frame 311, and the upper surface of the auxiliary frame 510 is in the same horizontal plane as the upper surface of the conveyor belt 315, and a limited slide groove is provided on the inner side of the auxiliary frame 510, and a limited slide block matched with the limited slide groove is fixed on one side of the pressure plate 56, and the pressure plate 56 is slidably assembled on the auxiliary frame 510 through the limited slide block, and an insertion groove 511 corresponding to the transverse telescopic moving member 453 is provided on the inner bottom wall of the auxiliary frame 510, and a ball bearing is embedded on the contact surface between the auxiliary frame 510 and the carton;

[0069] When the cartons on the auxiliary rack 510 are stacked to the point where the lower surface of the pressure plate 56 is higher than the upper surface of the push plate 58, the cartons are stopped from being transported, and then the electric hydraulic push rod 57 is started to drive the push plate 58 to move to one side, thereby pushing the stacked cartons onto the bundling table 59 for bundling and packaging.

[0070] Specifically, when the finished carton conveying and stacking mechanism of this production line is working / in use:

[0071] First, the carton folded into a sheet by the folding mechanism 10 is transported to the conveying unit 31 through the front conveying mechanism 20. During the conveying process, the telescopic limiting belt 32 applies a pressing force to the carton to prevent the carton from unfolding by itself during the conveying process.

[0072] During the operation of the conveying unit 31, two of the rotating pulleys 313 on both sides drive the pulley 464 installed on the surface thereof to rotate, and drive the other pulley 464 to rotate through the transmission belt 465, so that the shaft rod 462 at the end of the pulley 464 drives the eccentric wheel 463 to rotate. After the eccentric wheel 463 rotates, it drives the vertical moving rod 451 to move up and down in the vertical holding tube 44 through the retaining member 454. At the same time, the connecting plate 455 at the end of the eccentric wheel 463 rotates together, so that the telescopic cam member 456 rotates, and then drives the first telescopic link 43 to swing through the second telescopic link 457. During the swinging process, the transverse telescopic moving member 453 is driven to reciprocate in the horizontal direction through the third telescopic link 458, and cooperates with the vertical moving rod 451, so that the transverse telescopic moving member 453 can move back and forth in the horizontal direction and move up and down in the vertical direction at the same time;

[0073] When the first carton arrives at the preset position of the stacking unit 40, the transverse telescopic moving member 453 first moves horizontally into the insertion slot 511 on the auxiliary frame 510, then rises vertically, and simultaneously lifts the pressing plate 56 upward to create an unobstructed entry channel for the carton. At this time, the carton slides into the supporting surface of the auxiliary frame 510 under the action of the conveying unit 31. After sliding in, the transverse telescopic moving member 453 moves horizontally backward, and then moves down to a position lower than the lower surface of the bottom carton. At the same time, under the action of the elastic force of the first spring 55, the pressing plate 56 is quickly reset to the top of the carton to complete a stacking action. During the next stacking, the transverse telescopic moving member 453 moves horizontally into the insertion slot 511 on the auxiliary frame 510, and then lifts the stacked carton and the pressing plate 56 while rising vertically. When the new carton slides into the supporting surface of the auxiliary frame 510, it moves horizontally backward and moves down again to a position lower than the lower surface of the bottom carton.

[0074] This cycle repeats itself until the cartons on the auxiliary rack 510 are stacked to the point where the lower surface of the pressure plate 56 is higher than the upper surface of the push plate 58, the cartons are stopped from being transported, and the electric hydraulic push rod 57 is started to drive the push plate 58 to move to one side, pushing the stacked cartons onto the bundling table 59 for subsequent bundling and packaging operations. At this time, the push plate 58 is reset by the electric hydraulic push rod 57. It is worth noting that during the pushing process, the top of the push plate 58 always presses against the pressure plate 56 to prevent it from resetting downward under the action of the first spring 55, thereby ensuring that the push plate 58 can smoothly reset backward after pushing the cartons out. After resetting, the pressure plate 56 is driven to reset downward under the action of the elastic force of the first spring 55.

[0075] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A finished carton conveying and stacking mechanism for a production line, comprising a folding mechanism (10) and a front conveying mechanism (20) installed on one side of the folding mechanism (10), characterized in that: A rear conveying mechanism (30) is mounted on one side of the front conveying mechanism (20), a stacking unit (40) is mounted on the rear conveying mechanism (30), and a push-out unit (50) is mounted on one side of the rear conveying mechanism (30) close to the stacking unit (40); The rear conveying mechanism (30) comprises a conveying unit (31), and a telescopic limiting belt (32) is overlapped on the front conveying mechanism (20) and the conveying unit (31); The stacking unit (40) comprises two mounting frames (41), one end of one of the mounting frames (41) is fixed with a connecting seat (42), a first telescopic connecting rod (43) is rotatably connected to the connecting seat (42), one end of the other mounting frame (41) is fixed with a vertical retaining tube (44), a vertical lifting unit (45) is installed in the vertical retaining tube (44), both ends of the first telescopic connecting rod (43) are connected to the vertical lifting unit (45), and the other mounting frame (41) is equipped with a power unit (46); When the conveying unit (31) is in operation, it can drive the power unit (46) to operate. The vertical lifting unit (45) is driven by the power unit (46) to first move forward horizontally, and then lift up vertically to transport the carton on the ejection unit (50). When the newly transported carton on the rear conveying mechanism (30) enters the ejection unit (50), the vertical lifting unit (45) moves backward until it is no longer in contact with the carton, and then moves downward to a position lower than the lower surface of the carton located at the bottom. At this time, the above operation is repeated to stack the continuously transported cartons.

2. A finished product carton conveying and stacking mechanism for a production line according to claim 1, characterized in that: The conveying unit (31) comprises a frame (311), the frame (311) is rotatably connected to a plurality of roller shafts (312), a conveying belt (315) is mounted on the roller shafts (312), a pulley (313) is fixed to one end of the roller shaft (312) passing through the frame (311), a synchronous belt (314) is mounted on the pulley (313), a mounting seat is fixed to one side of the frame (311), a motor (316) is fixed to the mounting seat, and an output end of the motor (316) is connected to one of the pulleys 3 (13).

3. The finished product carton conveying and stacking mechanism of the production line according to claim 2 is characterized in that: The ejection unit (50) comprises a mounting plate (51), a plurality of vertical rods (52) are fixed on the frame (311), the top ends of the plurality of vertical rods (52) are commonly fixedly connected to the mounting plate (51), a plurality of sleeves (53) are fixed to the lower surface of the mounting plate (51), a square rod (54) is inserted into the sleeve (53), a first spring (55) is fixed to the top end of the square rod (54), the top end of the first spring (55) is fixed to the inner top wall of the sleeve (53), and a pressing plate (56) is commonly fixed to the bottom ends of the plurality of square rods (54); A horizontal plate is fixed to the inner side of two of the vertical rods (52), and an electric hydraulic push rod (57) is mounted on the horizontal plate. A push plate (58) for pushing the stacked cartons to one side is fixed to one end of the piston rod of the electric hydraulic push rod (57). A pull rod is fixed to one side of the other two vertical rods (52), and a bundling table (59) is fixed to one end of the two pull rods. One end of the bundling table (59) is fixed to the frame (311).

4. The finished product carton conveying and stacking mechanism of a production line according to claim 2 is characterized in that: The power unit (46) comprises a mounting rod (461) fixed on another mounting frame (41), a shaft (462) being rotatably connected inside the mounting rod (461), an eccentric wheel (463) being fixed to one end of the shaft (462), a pulley (464) being fixed to the other end of the shaft (462) and one end of one of the pulleys (313), and a transmission belt (465) being meshed with the two pulleys (464).

5. The finished product carton conveying and stacking mechanism of the production line according to claim 4 is characterized in that: The vertical lifting unit (45) comprises a vertical moving rod (451) inserted into the vertical holding tube (44), a sliding seat (452) is fixed at the bottom end of the vertical moving rod (451), and a transverse telescopic moving member (453) is slidably mounted in the sliding seat (452); A retaining member (454) adapted to the eccentric wheel (463) is fixed to the top end of the vertical moving rod (451), and the eccentric wheel (463) is rotatably connected in the retaining member (454). A connecting disk (455) is fixed to one end of the eccentric wheel (463), and a telescopic cam member (456) is mounted on the connecting disk (455). One end of the telescopic cam member (456) is rotatably connected to a second telescopic link (457), and the other end of the second telescopic link (457) is rotatably connected to the top end of the first telescopic link (43); A rotating seat is fixed to one end of the transverse telescopic movable member (453), a third telescopic connecting rod (458) is rotatably connected inside the rotating seat, and the other end of the third telescopic connecting rod (458) is rotatably connected to the bottom end of the first telescopic connecting rod (43).

6. The finished product carton conveying and stacking mechanism of a production line according to claim 3, characterized in that: A cross bar is fixedly mounted on the inner sides of the two vertical bars (52), an auxiliary frame (510) is fixed on the inner side of the cross bar, the bottom of the auxiliary frame (510) is overlapped on the upper surface of the frame (311), and the upper surface of the auxiliary frame (510) and the upper surface of the conveyor belt (315) are in the same horizontal plane; A limiting slide groove is provided on the inner side of the auxiliary frame (510); a limiting slider matched with the limiting slide groove is fixed on one side of the pressure plate (56); the pressure plate (56) is slidably assembled on the auxiliary frame (510) via the limiting slider; and an insertion groove (511) corresponding to the transverse telescopic moving part (453) is provided on the inner bottom wall of the auxiliary frame (510).

7. The finished product carton conveying and stacking mechanism of a production line according to claim 5, characterized in that: The telescopic limiting belt (32) comprises a first belt body (321), one end of which is connected to the folding mechanism (10), one end of which is fixed with a second belt body (322), one end of which is fixed with an extension belt (323), the other end of which is provided with a storage cavity matched with the extension belt (323), the extension belt (323) is inserted into the storage cavity, one end of which is fixed with a second spring, one end of which is fixed to a side wall of the storage cavity, and the second belt body (322) is provided with a long groove corresponding to the third telescopic connecting rod (458).

8. The finished product carton conveying and stacking mechanism of a production line according to claim 5, characterized in that: The transverse telescopic moving member (453) comprises a main moving member (4531) slidably assembled in a sliding seat (452), a slot is provided in the main moving member (4531), an insertion member (4532) is inserted in the slot, a knob stud is threadedly penetrated on the lower surface of the main moving member (4531), one end of the knob stud penetrated into the slot abuts against the insertion member (4532), so that the insertion member (4532) is fixed in the main moving member (4531) after being pulled out.

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