An automatic palletizing system for cigarette packing boxes

Abstract

The present invention discloses an automatic palletizing system for cigarette packing boxes, which comprises a cigarette feeding conveyor, a transition roller conveyor, a conveying and flipping device, a ball chain conveyor, a sorting device and a buffer chain conveyor that are connected in sequence; the output end of the buffer chain conveyor is docked with the input port of the box discharging mechanism, and the output port of the box discharging mechanism is docked with the input port of the palletizing elevator. Advantages: The present invention conveys the flat packing boxes to the conveying and flipping device through the cigarette feeding conveyor, and according to the actual palletizing situation, the packing boxes are flipped to a standing position through the conveying and flipping device, and then the packing boxes are rotated 90 degrees through the ball chain conveyor; after being adjusted by the sorting push plate of the sorting device, they are conveyed to the box discharging mechanism through the buffer chain conveyor, and the box discharging mechanism regularizes the successively conveyed packing boxes into one layer of the pallet, and then they are pushed onto the pallet of the palletizing elevator by the box discharging push plate; in this way, the process is repeated until the required number of layers is palletized on the pallet, improving the palletizing efficiency and reducing the labor intensity.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, and particularly relates to an automatic palletizing system for cigarette packing boxes. Background Art

[0002] After the packing boxes containing cigarettes are delivered from the tobacco production factory to the distribution center of the tobacco company, it is necessary to stack the packing boxes in layers on the pallet. Common palletizing methods, such as Figures 1 to 3 As shown, for the standard cigarette box palletizing method, a total of three layers are palletized, with two rows in each layer. Five packing boxes in each row are placed upright, among which three are placed longitudinally in contact, and the other two are placed horizontally in contact; currently, the stacking method is to park the freight truck at the door of the distribution center warehouse, manually place the cigarette packing boxes at the feeding end of the conveyor belt, transport the packing boxes to the designated position through the conveyor belt, then manually move them from the discharging end of the conveyor belt to the pallet and stack them as required, and then transfer the pallet to the shelf by a forklift; however, this palletizing method has a large manual labor intensity, a long working time, and low efficiency when a large number of packing boxes need to be palletized during the peak distribution period. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic palletizing system for cigarette packing boxes that can improve the palletizing efficiency and reduce the labor intensity.

[0004] The present invention is implemented by the following technical solutions: an automatic palletizing system for cigarette packing boxes, which includes a cigarette feeding conveyor, a transition roller conveyor, a conveying and flipping device, a ball chain conveyor, a sorting device, and a buffer chain conveyor that are connected end to end in sequence; the output end of the buffer chain conveyor is connected to the input port of the box discharging mechanism, a buffer baffle is movably arranged at the input port of the box discharging mechanism, a limit baffle is movably arranged at the output port of the box discharging mechanism, and the output port of the box discharging mechanism is connected to the input port of the palletizing elevator; the telescopic pallet of the box discharging mechanism passes through the input port of the palletizing elevator and is movably placed above the lifting chassis of the palletizing elevator.

[0005] Further, the conveying and flipping device includes a roller conveyor group and a flipping mechanism; the roller conveyor group includes two or more roller conveyors arranged side by side at intervals in parallel, the driving shaft of the flipping mechanism is arranged below the roller conveyor and is parallel to the rollers of the roller conveyor; the flipping fork of the flipping mechanism is placed at the gap between two adjacent roller conveyors.

[0006] Further, the flipping mechanism includes a driving motor and a lifting mechanism; the lifting mechanism is fixed below the roller conveyor group, the driving motor that moves up and down is fixed on the top surface of the lifting plate of the lifting mechanism, the output shaft of the driving motor is coaxially fixed with the driving shaft, and a cross-shaped flipping fork is fixed on the driving shaft.

[0007] Further, the lifting mechanism includes a bottom plate, a telescopic mechanism, and the lifting plate; the cylinder body of the telescopic mechanism is fixedly connected to the top surface of the bottom plate, and the telescopic rod of the telescopic mechanism is arranged upward and horizontally fixed with the lifting plate.

[0008] Further, the sorting device includes a sorting roller conveyor, and two magnetic coupling type rodless cylinders are arranged below the sorting roller conveyor. The sliders of the magnetic coupling type rodless cylinders slide along the direction parallel to the axis of the rollers of the sorting roller conveyor. A connecting plate is fixedly arranged on the top surface of each slider of the magnetic coupling type rodless cylinder. The connecting plate is placed between the rollers of the sorting roller conveyor. A sorting push plate is fixedly arranged on the connecting plate above the sorting roller conveyor. The plate surface of the sorting push plate is perpendicular to the axis direction of the rollers of the sorting roller conveyor.

[0009] Further, the case discharging mechanism includes a support frame and a belt conveyor arranged in the support frame; the feeding end of the belt conveyor is docked with the output end of the buffer chain conveyor; a case discharging push plate that reciprocally slides along the direction perpendicular to the conveying direction of the belt conveyor is arranged on the support frame above the belt conveyor; a support bottom plate and a telescopic support plate are horizontally arranged up and down on the support frame between the conveying section and the return section of the belt conveyor. The support bottom plate is fixedly connected to the support frame. The telescopic support plate is arranged to reciprocally slide, and the telescopic support plate has the same moving direction as the case discharging push plate.

[0010] Further, the palletizing elevator includes a frame, a lifting mechanism, and the lifting chassis; the lifting mechanism is arranged on the frame, and the lifting chassis that moves up and down and is connected to the lifting mechanism is horizontally arranged inside the frame. A transfer conveyor is fixedly arranged on the top surface of the lifting chassis.

[0011] Further, the lifting mechanism includes a lifting motor, a first transmission shaft, a second transmission shaft, and four lifting columns; the first transmission shaft and the second transmission shaft that are arranged parallel to each other are horizontally arranged on the top surface of the frame. The lifting motor with an output shaft drivingly connected to the first transmission shaft is fixedly arranged on the top surface of the frame; two lifting sprockets are coaxially sleeved and fixed on both the first transmission shaft and the second transmission shaft. A chain is hung on each lifting sprocket. One ends of the four chains are respectively fixedly connected to the tops of the corresponding four lifting columns. The bottoms of the four lifting columns are fixedly connected to the four corners of the lifting chassis; a driving sprocket corresponding to the two lifting sprockets on the second transmission shaft is coaxially sleeved on the first transmission shaft. The chains hung on the two lifting sprockets on the second transmission shaft are drivingly connected to the corresponding driving sprockets; the other ends of the four chains are fixedly connected to a counterweight block.

[0012] Furthermore, pallet input conveyors and pallet output conveyors with conveying directions parallel to that of the transfer conveyor are arranged at both ends of the palletizing elevator; a lifting type pallet disassembling device is provided on the pallet input conveyor.

[0013] Furthermore, the lifting type pallet disassembling device includes a lifting cylinder and two lifting mechanisms symmetrically arranged on both sides of the pallet input conveyor; the lifting cylinder is arranged below the pallet input conveyor, the telescopic end of the lifting cylinder faces upward and is horizontally fixed with a lifting plate; each lifting mechanism includes two columns and a lifting table slidably arranged up and down along the two columns, and a telescopic fork horizontally moving perpendicular to the conveying direction of the pallet input conveyor is arranged on the top surface of the lifting table, and the telescopic fork is movably arranged above the pallet input conveyor.

[0014] Advantages of the present invention: The present invention sequentially conveys the flat packaging boxes to the conveying and flipping device through the cigarette feeding conveyor and the transition roller conveyor, and according to the actual palletizing situation, the conveying and flipping device flips the packaging boxes into a standing state; conveys them to the ball chain plate machine through the roller conveyor group, and when it is necessary to rotate the packaging boxes, the ball chain plate machine can rotate the packaging boxes by 90 degrees; after passing through the ball chain plate machine, conveys them to the sorting roller conveyor, and after adjusting the positions of the packaging boxes through the sorting push plate, under the blocking of the buffer baffle, the sequentially conveyed packaging boxes are arranged according to the number of one row of the palletizing, conveyed to the row of boxes mechanism by the buffer chain plate machine, and the two rows of conveyed packaging boxes are sorted into one layer of the palletizing by the row of boxes mechanism, and then sent to the pallet of the palletizing elevator by the row of boxes push plate and the telescopic support plate; thus, repeat the operation until the required number of layers is palletized on the pallet; the present invention realizes automatic palletizing, reduces the labor intensity of workers, and improves the operation efficiency. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the standard cigarette box palletizing method described in the background art of the present invention.

[0016] Figure 2 is Figure 1 top view of.

[0017] Figure 3 is Figure 1 left view of.

[0018] Figure 4 It is a schematic structural diagram of Embodiment 1.

[0019] Figure 5 is Figure 4 A - A cross-sectional view of.

[0020] Figure 6 It is a schematic structural diagram of the conveying and flipping device described in Embodiment 1.

[0021] Figure 7 is the top view of Figure 6 .

[0022] Figure 8 is the structural schematic diagram of the sorting device described in Embodiment 1.

[0023] Figure 9 is the Figure 8 B - B sectional view of

[0024] Figure 10 is the Figure 8 C - C sectional view of

[0025] Figure 11 is the structural schematic diagram of the case - discharging mechanism described in Embodiment 1.

[0026] Figure 12 is the Figure 11 top view of

[0027] Figure 13 is the Figure 11 left view of

[0028] Figure 14 is the schematic diagram of the usage state when the telescopic pallet of the case - discharging mechanism described in Embodiment 1 extends.

[0029] Figure 15 is the schematic diagram of the usage state when the case - discharging mechanism described in Embodiment 1 pushes the packing case into the palletizing elevator.

[0030] Figure 16 is the Figure 15 top view of

[0031] Figure 17 is the structural schematic diagram of Embodiment 2.

[0032] Figure 18 is the structural schematic diagram of the lifting - type pallet - removing device described in Embodiment 2.

[0033] Figure 19 is the structural schematic diagram of the lifting mechanism described in Embodiment 2.

[0034] The markings of each component in the attached drawings are as follows: cigarette inlet conveyor 1, conveying and flipping device 2, roller conveyor unit 2.1, roller conveyor 2.11, flipping mechanism 2.2, driving motor 2.21, lifting mechanism 2.22, bottom plate 2.221, telescopic mechanism 2.222, lifting plate 2.223, guide sleeve 2.224, guide rod 2.225, driving shaft 2.23, flipping fork 2.24, ball chain plate machine 3, sorting device 4, sorting roller conveyor 4.1, sorting push plate 4.2, magnetic coupling type rodless cylinder 4.3, connecting plate 4.4, buffer chain plate machine 5, case discharging mechanism 6, support frame 6.1, belt conveyor 6.2, support bottom plate 6.3, telescopic support plate 6.4, case discharging push plate 6.5, buffer baffle 6.6, channel steel 6.7, guide wheel 6.8, telescopic support plate driving mechanism 6.9, support wheel 6.10, guide rail 6.11, push plate slider 6.12, push plate driving mechanism 6.13, palletizing elevator 7, frame 7.1, lifting chassis 7.2, lifting mechanism 7.3, lifting motor 7.31, first transmission shaft 7.32, lifting sprocket 7.33, second transmission shaft 7.34, lifting column 7.35, counterweight 7.36, transmission sprocket 7.37, chain 7.38, transfer conveyor 7.4, limit baffle 8, pallet input conveyor 9, pallet output conveyor 10, lifting type pallet disassembling device 11, lifting cylinder 11.1, lifting mechanism 11.2, column 11.21, lifting platform 11.22, telescopic fork 11.23, lifting plate 11.3, packing box 13, pallet 14, transition roller conveyor 15. Detailed implementation manners

[0035] Example 1: As Figures 4 to 5 shown, an automatic palletizing system for cigarette packing boxes includes a cigarette inlet conveyor 1, a transition roller conveyor 15, a conveying and flipping device 2, a ball chain plate machine 3, a sorting device 4 and a buffer chain plate machine 5 that are connected end to end in sequence; the cigarette inlet conveyor 1 is connected to the conveying and flipping device 2 through the inclined transition roller conveyor 15 to make up for the height difference between the cigarette inlet conveyor 1 and the conveying and flipping device 2; the packing box 13 is horizontally placed at the feeding end of the cigarette inlet conveyor 1 manually, and after passing through the cigarette inlet conveyor 1 and the transition roller conveyor 15 in sequence, it is conveyed to the conveying and flipping device 2.

[0036] As Figure 6 and Figure 7As shown, the conveying and flipping device 2 includes a roller conveying unit 2.1 and a flipping mechanism 2.2; the roller conveying unit 2.1 includes three roller conveyors 2.11 arranged side by side at intervals and in parallel; the flipping mechanism 2.2 includes a driving motor 2.21 and a lifting mechanism 2.22; the lifting mechanism 2.22 is fixed below the roller conveying unit 2.1, and the driving motor 2.21 that moves up and down is fixed on the top surface of the lifting plate 2.223 of the lifting mechanism 2.22, and the output shaft of the driving motor 2.21 is arranged parallel to the rollers of the roller conveying unit 2.1; a driving shaft 2.23 placed below the rollers of the roller conveying unit 2.1 is coaxially fixed to the output shaft of the driving motor 2.21, and a cross-shaped flipping fork 2.24 is fixed on the driving shaft 2.23 between the gaps of every two adjacent roller conveyors 2.11; the horizontally placed packing box 13 is conveyed onto the roller conveying unit 2.1. When the packing box 13 abuts against one side of the cross-shaped flipping fork 2.24, the driving motor 2.21 is controlled to drive the driving shaft 2.23 to rotate 90 degrees. While the driving shaft 2.23 rotates, it drives the flipping fork 2.24 to flip 90 degrees, thereby flipping the packing box 13 from a flat state to a standing state, and at this time, all the packing boxes 13 are longitudinal; there is no need for manual stacking and flipping, reducing the labor intensity of workers; the lifting mechanism 2.22 includes a bottom plate 2.221, a telescopic mechanism 2.222, and a lifting plate 2.223 fixed in sequence from bottom to top; the telescopic mechanism 2.222 can be any one of a hydraulic cylinder, a pneumatic cylinder, or an electric push rod; the bottom plate 2.221 is fixed to the ground, the cylinder body of the telescopic mechanism 2.222 is fixed to the top surface of the bottom plate 2.221, the telescopic rod of the telescopic mechanism 2.222 is arranged upward and horizontally fixes the lifting plate 2.223, and the driving motor 2.21 is fixed to the top surface of the lifting plate 2.223; when it is not necessary to flip the packing box 13 according to the stacking method requirements of other packing boxes 13, the telescopic rod of the telescopic mechanism 2.222 is controlled to contract, driving the driving motor 2.21 and the flipping fork 2.24 to descend; two guide sleeves 2.224 symmetrically arranged with respect to the telescopic mechanism 2.222 are fixed on the top surface of the bottom plate 2.221, and a guide rod 2.225 that moves up and down is slidably inserted into each guide sleeve 2.224, and the top end of the guide rod 2.225 is fixedly connected to the lifting plate 2.223; during the telescopic process of the telescopic mechanism 2.222, the guide rod 2.225 slides up and down along the guide sleeve 2.224, ensuring the smooth up and down movement of the driving motor 2.21 and improving work efficiency.

[0037] The discharging end of the roller conveyor unit 2.1 is butted against the feeding end of the ball chain conveyor 3. The packaged box 13 after being flipped is conveyed onto the ball chain conveyor 3. The ball chain conveyor 3 can achieve linear conveying of objects and can also horizontally flip an object by 90 degrees. There are many movable rollers provided on the ball chain conveyor 3, which can realize the turning of the packaged box 13 during the conveying process. The ball chain conveyor 3 is a prior art, and its specific structure will not be described herein again. According to the palletizing requirements, when arranging in rows, when a vertically arranged packaged box 13 is needed, the ball chain conveyor 3 can continue to convey the packaged box 13 forward. When a horizontally arranged packaged box 13 is needed, the ball chain conveyor 3 rotates the packaged box 13 horizontally by 90 degrees. The packaged box 13 is conveyed to the sorting device 4 through the ball chain conveyor 3.

[0038] As Figures 8 to 10 shown, the sorting device 4 includes a sorting roller conveyor 4.1 and a sorting push plate 4.2. On the frame below the rollers of the sorting roller conveyor 4.1, two magnetically coupled rodless cylinders 4.3 parallel to the rollers of the sorting roller conveyor 4.1 are fixed. The slider of the magnetically coupled rodless cylinder 4.3 slides along the direction parallel to the axis of the rollers of the sorting roller conveyor 4.1. A connecting plate 4.4 is fixed to the top surface of the slider of each magnetically coupled rodless cylinder 4.3. The top end of the connecting plate 4.4 passes through the gap between the rollers of the sorting roller conveyor 4.1 and is fixed with a sorting push plate 4.2. The plate surface of the sorting push plate 4.2 is perpendicular to the axis direction of the rollers of the sorting roller conveyor 4.1. Since each packaged box 13 conveyed onto the sorting roller conveyor 4.1 is usually placed in the middle of the sorting roller conveyor 4.1, according to the palletizing arrangement requirements, it is necessary to adjust the positions of two horizontally arranged packaged boxes 13 in each row perpendicular to the conveying direction. When the packaged box 13 is conveyed to the position of the sorting push plate 4.2 by the sorting roller conveyor 4.1, by controlling the corresponding magnetically coupled rodless cylinder 4.3 to drive the sorting push plate 4.2, the packaged box 13 is horizontally pushed to the opposite side. The discharging end of the sorting roller conveyor 4.1 is butted against the feeding end of the buffer chain conveyor 5. The sorted packaged box 13 is conveyed onto the buffer chain conveyor 5.

[0039] As Figures 11 to 14As shown, the case discharging mechanism 6 includes a support frame 6.1 and a belt conveyor 6.2 disposed within the support frame 6.1; the output end of the buffer chain conveyor 5 is docked with the input port of the case discharging mechanism 6, and a cylinder with its telescopic end facing upward is fixed on the frame below the input port of the case discharging mechanism 6. The telescopic end of the cylinder is fixed with a buffer baffle 6.6 that moves up and down, and the buffer baffle 6.6 is movably placed at the input port of the case discharging mechanism 6; under the blocking of the buffer baffle 6.6, after the number of packaging cases 13 gradually accumulated on the buffer chain conveyor 5 reaches the number of one row in each layer of stacking, the cylinder is controlled to contract, driving the buffer baffle 6.6 to descend, canceling the blocking of the packaging cases 13, and conveying the accumulated row of packaging cases 13 into the case discharging mechanism 6 through the buffer chain conveyor 5. Then the buffer baffle 6.6 rises to continue blocking the next row of packaging cases 13; the output end of the buffer chain conveyor 5 is docked with the feeding end of the belt conveyor 6.2 within the case discharging mechanism 6, and the conveying direction of the belt conveyor 6.2 is the same as that of the buffer chain conveyor 5. One row of packaging cases 13 is conveyed onto the belt conveyor 6.2 by the buffer chain conveyor 5, and then conveyed to the middle of the case discharging mechanism 6 by the belt conveyor 6.2, after which the belt conveyor 6.2 stops.

[0040] On the support frame 6.1 above the belt conveyor 6.2, there is a row of box pushing plates 6.5 that reciprocally slide perpendicular to the conveying direction of the belt conveyor 6.2; on the support frame 6.1 between the conveying section and the return section of the belt conveyor 6.2, there are horizontally arranged a support bottom plate 6.3 and a telescopic support plate 6.4 arranged up and down. The support bottom plate 6.3 is fixedly connected to the support frame 6.1, and the telescopic support plate 6.4 is reciprocally slidably arranged. The telescopic support plate 6.4 has the same moving direction as the row of box pushing plates 6.5; on the support frame 6.1, there is a telescopic support plate driving mechanism 6.9 connected to the telescopic support plate 6.4. In this embodiment, the telescopic support plate driving mechanism 6.9 is a synchronous belt driving module. The synchronous belt driving module includes a motor, a synchronous belt, and a slider. The synchronous belt driving module is a prior art, and its specific structure will not be described in detail here. The slider of the synchronous belt driving module is fixedly connected to the bottom surface of the telescopic support plate 6.4. Driven by the forward and reverse rotation of the motor, the synchronous belt drives the telescopic support plate 6.4 to expand and contract through the slider; on the support frame 6.1 corresponding to both side edges of the telescopic support plate 6.4, there are fixed channel steels 6.7 with opposite openings. On the bottom surface of the telescopic support plate 6.4, there are rotatably arranged guide wheels 6.8 that roll along the corresponding channel steels 6.7. During the expansion and contraction process of the telescopic support plate 6.4, the guide wheels 6.8 roll and contact along the channel steels 6.7, reducing the friction force and ensuring the expansion and contraction efficiency of the telescopic support plate 6.4; the conveying section of the belt conveyor 6.2 is in sliding contact with the top surface of the support bottom plate 6.3, ensuring that the packaging box 13 can stably move from the belt conveyor 6.2 to the support bottom plate 6.3; on the support frame 6.1 above the support bottom plate 6.3, there is a guide rail 6.11 horizontally fixed along the expansion and contraction direction of the telescopic support plate 6.4. On the guide rail 6.11, there slides a push plate slider 6.12 fixedly connected to the row of box pushing plates 6.5. On the support frame 6.1, there is a push plate driving mechanism 6.13 connected to the row of box pushing plates 6.5. The push plate driving mechanism 6.13 can be any one of a cylinder, a hydraulic cylinder, or a synchronous belt driving module. In this embodiment, a synchronous belt driving module is selected. The slider fixed below the synchronous belt on the synchronous belt driving module is connected to the row of box pushing plates 6.5. By controlling the forward and reverse rotation of the motor, under the matching guidance of the push plate slider 6.12 and the guide rail 6.11, the row of box pushing plates 6.5 can push the packaging box 13 on the belt conveyor 6.2 onto the support bottom plate 6.3; the output port of the row of box mechanism 6 is docked with the input port of the palletizing elevator 7. The telescopic support plate 6.4 passes through the output port of the support frame 6.1 and is placed above the lifting chassis 7.2 of the palletizing elevator 7, sending each layer of packaging box 13 into the palletizing elevator 7 for easy palletizing; between the output port of the row of box mechanism 6 and the input port of the palletizing elevator 7, there is a limit baffle 8 that is movably blocked at the input port of the palletizing elevator 7. In this embodiment, at the output port of the support frame 6.1, there is a cylinder fixed below the telescopic support plate 6.4. The telescopic end of the cylinder faces upward and is fixed with a limit baffle 8 that moves up and down; blocked by the limit baffle 8, the row of box pushing plates 6.5 pushes one row of packaging boxes 13 to the limit baffle 8, waiting for the belt conveyor 6.After the next row of packing cases 13 is conveyed and pushed by the row box pushing plate 6.5 to be in close contact with the upper row of packing cases 13, the limit baffle 8 descends to cancel the blockage of the packing cases 13, and the telescopic pallet 6.4 extends into the palletizing elevator 7. At this time, under the continuous pushing of the row box pushing plate 6.5, a layer of packing cases 13 composed of two rows is pushed into the palletizing elevator 7; a supporting wheel 6.10 perpendicular to the telescopic direction of the telescopic pallet 6.4 is rotatably arranged on the case outlet side of the supporting frame 6.1. The supporting wheel 6.10 is in rolling contact with the bottom surface of the telescopic pallet 6.4, which is beneficial to reducing the friction force when the telescopic pallet 6.4 expands and contracts and improving the telescopic efficiency of the telescopic pallet 6.4.

[0041] Such as Figure 15 And Figure 16As shown in the figure, the palletizing elevator 7 includes a frame 7.1 and a lifting chassis 7.2; a lifting chassis 7.2 that moves up and down horizontally is provided inside the frame 7.1, and a lifting mechanism 7.3 connected to the top edge of the top surface of the lifting chassis 7.2 is fixed on the frame 7.1. The lifting mechanism 7.3 includes a lifting motor 7.31, a first transmission shaft 7.32, a second transmission shaft 7.34, and four lifting columns 7.35; a first transmission shaft 7.32 and a second transmission shaft 7.34 that are arranged parallel to each other are horizontally provided on the top surface of the frame 7.1, and a lifting motor 7.31 with an output shaft drivingly connected to the first transmission shaft 7.32 is fixed on the top surface of the frame 7.1; two lifting sprockets 7.33 are coaxially sleeved and fixed on both the first transmission shaft 7.32 and the second transmission shaft 7.34, and a chain 7.38 is hung on each lifting sprocket 7.33. One ends of the four chains 7.38 are respectively fixedly connected to the tops of the corresponding four lifting columns 7.35, and the bottoms of the four lifting columns 7.35 are fixed to the four corners of the lifting chassis 7.2; a driving sprocket 7.37 corresponding to the two lifting sprockets 7.33 on the second transmission shaft 7.34 is coaxially sleeved on the first transmission shaft 7.32, and the chains 7.38 hung on the two lifting sprockets 7.33 on the second transmission shaft 7.34 are drivingly connected to the corresponding driving sprockets 7.37; the other ends of the four chains 7.38 are fixedly connected to a counterweight 7.36; a transfer conveyor 7.4 with a conveying direction perpendicular to the telescopic direction of the telescopic pallet 6.4 is fixed on the top surface of the lifting chassis 7.2; the transfer conveyor 7.4 is used for placing and transferring the pallet 14. Before the telescopic pallet 6.4 extends into the palletizing elevator 7, control the lifting motor 7.31 to rotate forward. Under the action of the counterweight 7.36, the lifting chassis 7.2 is pulled up to a specified position through the chain 7.38, so that after the telescopic pallet 6.4 carrying the packing box 13 extends above the pallet 14, palletizing can be carried out; when palletizing the first layer, the telescopic pallet 6.4 extends to be adjacent to or in direct contact with the top surface of the pallet 14, and the row of boxes push plate 6.5 pushes the packing box 13 to directly above the pallet 14, holds the packing box 13 by the row of boxes push plate 6.5, and then control the telescopic pallet 6.4 to contract. At this time, the first layer of packing boxes 13 falls onto the pallet 14; when palletizing the second layer, control the lifting motor 7.31 to rotate in reverse, so that the lifting chassis 7.2 descends by the height of one layer of packing boxes 13. At this time, when the telescopic pallet 6.4 extends again, it is adjacent to or in direct contact with the top surface of the first layer of packing boxes 13 on the pallet 14. The row of boxes push plate 6.5 pushes the second layer of packing boxes 13 to directly above the second layer of packing boxes 13, holds the second layer of packing boxes 13 by the row of boxes push plate 6.5, and then control the telescopic pallet 6.4 to contract. At this time, the second layer of packing boxes 13 falls onto the first layer of packing boxes 13; when palletizing to a higher layer subsequently, the palletizing process is the same as that of the second layer until the palletizing is completed, and the lifting chassis 7.2 descends to the initial lowest position.

[0042] The present invention sequentially conveys the flat packaging boxes 13 to the conveying and flipping device 2 through the smoke inlet conveyor 1 and the transition roller conveyor 15. According to the actual palletizing situation, the conveying and flipping device 2 flips the packaging boxes 13 into a standing position; conveys them to the ball chain conveyor 3 through the roller conveyor unit 2.1. When it is necessary to rotate the packaging boxes 13, the ball chain conveyor 3 is controlled to rotate the packaging boxes 13 by 90 degrees; after passing through the ball chain conveyor 3, they are conveyed to the sorting roller conveyor 4.1. After adjusting the positions of the packaging boxes 13 through the sorting push plate 4.2, blocked by the buffer baffle 6.6, the sequentially conveyed packaging boxes 13 are arranged according to the number of one row of the palletizing. They are conveyed to the box arranging mechanism 6 by the buffer chain conveyor 5. The box arranging mechanism 6 arranges two rows of the conveyed packaging boxes 13 into one layer of the palletizing, and then sends them to the tray 14 of the palletizing elevator 7 through the box arranging push plate 6.5 and the telescopic support plate 6.4; thus, it is repeated until the required number of layers is palletized on the tray 14; the present invention realizes automatic palletizing, reduces the labor intensity of workers, and improves the operation efficiency.

[0043] Example 2: As Figures 17 to 19As shown in the figure, an automatic palletizing system for cigarette packing boxes has an overall structure that is basically the same as that of Embodiment 1. The difference lies in that pallet input conveyor 9 and pallet output conveyor 10 with conveying directions parallel to that of transfer conveyor 7.4 are arranged at both ends of palletizing elevator 7. A lifting type pallet disassembling device 11 is provided on pallet input conveyor 9. The lifting type pallet disassembling device 11 includes a lifting cylinder 11.1 and two lifting mechanisms 11.2 symmetrically placed on both sides of pallet input conveyor 9. Each lifting mechanism 11.2 includes two columns 11.21 arranged along the conveying direction of pallet input conveyor 9. A lifting platform 11.22 is slidably arranged up and down between the two columns 11.21. A telescopic fork 11.23 is horizontally moved along the direction perpendicular to the conveying direction of pallet input conveyor 9 on the top surface of the lifting platform 11.22. The telescopic fork 11.23 is movably placed above pallet input conveyor 9. The lifting cylinder 11.1 is placed below pallet input conveyor 9. The telescopic rod of the lifting cylinder 11.1 faces upward and is horizontally fixed with a lifting plate 11.3. Pallet input conveyor 9 is a chain conveyor, including two parallel chains. The lifting cylinder 11.1 is placed between the two chains. Multiple stacked pallets 14 are erected between the two chains. The telescopic forks 11.23 of the two lifting mechanisms 11.2 are inserted into both sides of the second-layer pallet 14. By controlling the lifting platform 11.22 to rise, the pallets 14 above the second layer are lifted. The pallet input conveyor 9 is started to convey the first-layer pallet into the palletizing elevator 7. After the pallet input conveyor 9 stops, the lifting cylinder 11.1 rises, and at the same time, the lifting platform 11.22 descends to place the pallets 14 above the second layer on the lifting plate 11.3. During the descending process of the lifting cylinder 11.1, the pallets 14 above the second layer are placed on the pallet input conveyor 9. Thus, the lifting type pallet disassembling device 11 can quickly and effectively provide pallets 14 without manual replenishment, improving the operation efficiency. When the lifting chassis 7.2 is placed at the lowest position, both ends of the transfer conveyor 7.4 are respectively docked with the pallet input conveyor 9 and the pallet output conveyor 10. The pallet input conveyor 9 conveys the pallet 14 to the transfer conveyor 7.4. After palletizing, the transfer conveyor 7.4 conveys the palletized pallet 14 to the pallet output conveyor 10, and the pallet output conveyor 10 conveys the palletized pallet 14 to a designated position for easy transfer.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic palletizing system for cigarette packing boxes, characterized in that, It includes a tobacco feeding conveyor, a transition roller conveyor, a conveying and turning device, a ball chain conveyor, a sorting device and a buffer chain conveyor which are connected end to end in sequence; the output end of the buffer chain conveyor is docked with the input port of the case discharging mechanism, a buffer baffle is movably arranged at the input port of the case discharging mechanism, a limit baffle is movably arranged at the output port of the case discharging mechanism, and the output port of the case discharging mechanism is docked with the input port of the palletizing elevator; the telescopic pallet of the case discharging mechanism passes through the input port of the palletizing elevator and is movably placed above the lifting chassis of the palletizing elevator. The case discharging mechanism includes a support frame and a belt conveyor arranged in the support frame; the feeding end of the belt conveyor is docked with the output end of the buffer chain conveyor; a case discharging push plate which reciprocally slides along the direction perpendicular to the conveying direction of the belt conveyor is arranged on the support frame above the belt conveyor; a support bottom plate and a telescopic pallet which are arranged vertically are horizontally arranged on the support frame between the conveying section and the return section of the belt conveyor, the support bottom plate is fixedly connected with the support frame, the telescopic pallet is reciprocally slidably arranged, and the telescopic pallet has the same moving direction as the case discharging push plate. The sorting device includes a sorting roller conveyor, and two magnetic coupling type rodless cylinders are arranged below the sorting roller conveyor; the sliders of the magnetic coupling type rodless cylinders slide along the direction parallel to the axis of the rollers of the sorting roller conveyor, a connecting plate is fixedly arranged on the top surface of the slider of each magnetic coupling type rodless cylinder, the connecting plate is placed between the rollers of the sorting roller conveyor, and a sorting push plate is fixedly arranged on the connecting plate above the sorting roller conveyor, and the plate surface of the sorting push plate is perpendicular to the axis of the rollers of the sorting roller conveyor.

2. The automatic palletizing system for cigarette packing boxes according to claim 1, wherein The conveying and turning device includes a roller conveyor group and a turning mechanism; the roller conveyor group includes two or more roller conveyors arranged side by side at intervals and in parallel; the driving shaft of the turning mechanism is placed below the roller conveyor and is arranged in parallel with the rollers of the roller conveyor; the turning fork of the turning mechanism is placed at the gap between two adjacent roller conveyors.

3. The automatic palletizing system for cigarette packing boxes according to claim 2, wherein The turning mechanism includes a driving motor and a lifting mechanism; the lifting mechanism is fixedly arranged below the roller conveyor group, the driving motor which moves up and down is fixedly arranged on the top surface of the lifting plate of the lifting mechanism, the output shaft of the driving motor is coaxially fixedly provided with the driving shaft, and a cross-shaped turning fork is fixedly arranged on the driving shaft.

4. The automatic palletizing system for cigarette packing boxes according to claim 3, characterized in that, The lifting mechanism includes a bottom plate, a telescopic mechanism and the lifting plate; the cylinder body of the telescopic mechanism is fixedly connected with the top surface of the bottom plate, the telescopic rod of the telescopic mechanism faces upward and is horizontally fixedly provided with the lifting plate.

5. The automatic palletizing system for cigarette packing boxes according to claim 1, wherein The palletizing elevator includes a frame, a lifting mechanism and the lifting chassis; the lifting mechanism is arranged on the frame, the lifting chassis which moves up and down and is connected with the lifting mechanism is horizontally arranged in the frame, and a transfer conveyor is fixedly arranged on the top surface of the lifting chassis.

6. The automatic palletizing system for cigarette packing boxes according to claim 5, wherein, The lifting mechanism includes a lifting motor, a first transmission shaft, a second transmission shaft, and four lifting columns. On the top surface of the frame, the first transmission shaft and the second transmission shaft are horizontally arranged in parallel. The lifting motor with an output shaft drivingly connected to the first transmission shaft is fixed on the top surface of the frame. On both the first transmission shaft and the second transmission shaft, two lifting sprockets are coaxially sleeved and fixed. A chain is hung on each of the lifting sprockets. One ends of the four chains are respectively fixedly connected to the tops of the corresponding four lifting columns, and the bottoms of the four lifting columns are fixedly connected to the four corners of the lifting chassis. A transmission sprocket corresponding to the two lifting sprockets on the second transmission shaft is coaxially sleeved on the first transmission shaft. The chains hung on the two lifting sprockets on the second transmission shaft are drivingly connected to the corresponding transmission sprockets. The other ends of the four chains are fixedly connected to the counterweight.

7. The automatic palletizing system for cigarette packing boxes according to claim 5, wherein At both ends of the palletizing elevator, a pallet input conveyor and a pallet output conveyor with a conveying direction parallel to that of the transfer conveyor are arranged. The pallet input conveyor is provided with a lifting type pallet disassembling device.

8. The automatic palletizing system for cigarette packing cases according to claim 7, characterized in that, The lifting type pallet disassembling device includes a lifting cylinder and two lifting mechanisms symmetrically arranged on both sides of the pallet input conveyor. The lifting cylinder is arranged below the pallet input conveyor, and the telescopic end of the lifting cylinder faces upward and is horizontally fixed with a lifting plate. The lifting mechanism includes two columns and a lifting platform slidably arranged up and down along the two columns. On the top surface of the lifting platform, a telescopic fork horizontally moving perpendicular to the conveying direction of the pallet input conveyor is provided, and the telescopic fork is movably arranged above the pallet input conveyor.

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