Stacker pallet carton stacking device and its stacking method

Abstract

The present invention discloses a device for stacking pallets and cartons and a method for combining the same. The stacking device includes a carton supply machine for supplying cartons; a first conveyor line for conveying pallets, one end of which is arranged adjacent to the carton supply machine, the conveying surface of the first conveyor line is located below the carton outlet of the carton supply machine and has a hollow area, and the second conveyor line is located at the hollow area and adjacent to the carton outlet of the carton supply machine; in a first state, the conveying surface of the second conveyor line is lower than the conveying surface of the first conveyor line; in a second state, the conveying surface of the second conveyor line is higher than the conveying surface of the first conveyor line and the top surface of the pallet thereon is lower than the bottom surface of the carton outlet of the carton supply machine. This solution conveys the pallet through the first conveyor line, and lifts the pallet and receives the cartons by lifting the second conveyor line, so that the pallet can be transported to the outside through the second conveyor line. The structure is simple and easy to implement, and effectively improves the stacking efficiency of the pallets and cartons.

Description

Technical Field

[0001] The present invention relates to a conveying system, in particular to a pallet carton stacking device and a stacking method thereof. Background Art

[0002] In the process of polysilicon processing, it is necessary to package the bagged polysilicon through a box. With the rapid development of automation equipment, the boxing of polysilicon production is also developing in the direction of automated operation.

[0003] In the existing automated boxing production line, it is often necessary to convey the cartons through a pallet on the conveyor line, which leads to the need to first place the cartons on the pallet to provide conditions for subsequent boxing operations.

[0004] However, since the material of the carton is generally soft and not easily handled by clamping jaws, etc., it is often necessary to place the cartons on the pallet manually.

[0005] Although there is also a carton supply machine for supplying cartons, the height of the carton outlet of the carton supply machine is relatively high, and the conveyor line needs to be lifted to a relatively high height to cooperate with receiving the materials. After the cartons and the pallet on the conveyor line are stacked, the stacked pallet and cartons cannot be conveyed to the outside through the original pallet conveyor line for use. Summary of the Invention

[0006] The purpose of the present invention is to solve the above problems existing in the prior art, and provide a pallet carton stacking device and a stacking method thereof.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] The pallet carton stacking device includes

[0009] A carton supply machine for supplying cartons;

[0010] A first conveyor line for conveying the pallet, one end of which is adjacent to the carton supply machine, the conveying surface of the first conveyor line is below the carton outlet of the carton supply machine, and has a hollow area,

[0011] A second conveyor line located at the hollow area and adjacent to the carton outlet of the carton supply machine;

[0012] In the first state, the conveying surface of the second conveyor line is lower than the conveying surface of the first conveyor line;

[0013] In the second state, the conveying surface of the second conveyor line is higher than the conveying surface of the first conveyor line and the top surface of the pallet thereon is lower than the bottom surface of the carton outlet of the carton supply machine.

[0014] Preferably, in the pallet carton stacking device, the second conveyor line includes a frame and two rows of rollers arranged at both sides of the frame with a gap, and each row of rollers is provided with a belt.

[0015] Preferably, in the pallet carton stacking device, the diameters of the rollers at both ends of each row of rollers are larger than the diameter of the rollers in the middle, and the tops of all the rollers are flush.

[0016] Preferably, in the pallet carton stacking device, positioning mechanisms for centering the cartons on the second conveyor line are provided on both sides of the first conveyor line.

[0017] Preferably, in the pallet carton stacking device, the positioning mechanism includes a first cylinder located on both sides of the first conveyor line, the cylinder axis of the first cylinder extends axially and is connected to the second cylinder, the cylinder axis of the second cylinder extends in a direction perpendicular to the first conveyor line and is connected to an L-shaped positioning piece, and the bottom plate of the L-shaped positioning piece has a cutting edge facing the first conveyor line.

[0018] Preferably, in the above-mentioned pallet carton stacking device, a third conveyor line docking with the second conveyor line is further provided in the hollow area of the first conveyor line, and the conveying direction of the third conveyor line is perpendicular to the conveying direction of the first conveyor line.

[0019] In a third state, the conveying surface of the third conveying line is lower than the conveying surface of the first conveying line;

[0020] In the fourth state, the conveying surface of the third conveying line is higher than the conveying surface of the first conveying line and is not higher than the conveying surface of the second conveying line in the second state.

[0021] Preferably, in the pallet carton stacking device, the input end of the first conveyor line is connected to the pallet output end of the stacking pallet splitting device.

[0022] Preferably, in the stacking device for stacking cartons, the stacking tray splitting device includes

[0023] The fourth conveyor line has a structure for driving the stacked pallets thereon, and its conveying surface has a hollow portion.

[0024] The lifting mechanism has a structure for driving the stacking tray on the fourth conveyor line to rise and fall. The lifting mechanism is located in the hollow portion and has two lifting actions to switch the top surface between a first height, a second height and a third height that increase in sequence. The first height is not higher than the conveying surface of the fourth conveyor line, and the second height is higher than the conveying surface of the fourth conveyor line.

[0025] Support mechanisms are provided on both sides of the fourth conveying line;

[0026] When the top surface of the lifting mechanism is at the second height, the supporting mechanism applies an upward supporting force to the penultimate stack pallet on the lifting mechanism;

[0027] When the top surface of the lifting mechanism is at the first height and the third height, the supporting mechanism does not apply a supporting force to the stack pallet.

[0028] Preferably, in the pallet carton stacking device, a lifting device is further provided at the front end of the fourth conveyor line at the hollow part. The top surface of the lifting device can be switched between the fourth height and the fifth height. The fourth height is not higher than the conveying surface of the fourth conveyor line, and the fifth height is higher than the conveying surface of the fourth conveyor line.

[0029] The stacking method of the pallet carton stacking device includes the following steps:

[0030] S1, The first conveyor line conveys the pallet located thereon above the second conveyor line;

[0031] S2, The conveying surface of the second conveyor line moves up to separate the pallet from the first conveyor line;

[0032] S3, The carton supply machine conveys a carton onto the pallet on the second conveyor line;

[0033] S4, The positioning mechanism is activated to position the carton in the center of the pallet;

[0034] S5, The conveying surface of the third conveyor line is lifted to be flush with the conveying surface of the second conveyor line;

[0035] S6, The second conveyor line is activated to transfer the pallet and the carton thereon to the third conveyor line;

[0036] S7, After the third conveyor line is activated to transfer the pallet and the carton outside the first conveyor line, its conveying surface drops;

[0037] S8, Repeat steps S1 - S7.

[0038] The advantages of the technical solution of the present invention are mainly reflected in:

[0039] This solution is exquisitely designed and has a simple structure. The pallet is conveyed by the first conveyor line, and the second conveyor line is used for lifting and receiving the carton by lifting and lowering, so that the pallet can be conveyed to the outside by the second conveyor line. The structure is simple and easy to implement, effectively improving the stacking efficiency of the pallet and the carton.

[0040] The special structural design of the first conveyor line and the second conveyor line in this solution provides conditions for the implementation of the whole solution. Moreover, the structure of multiple supporting rollers of the second conveyor line can effectively improve the load capacity, while reducing the width of the belt and minimizing the wear of the belt.

[0041] The positioning mechanism can effectively ensure that the carton is centered, improve the position consistency of the carton, and thus facilitate subsequent use.

[0042] Further combined with the third conveyor line, it can better achieve the transfer and output of the stacked pallet and the carton after stacking.

[0043] Combined with the stacking pallet splitting device, the integration of the equipment is improved, the functions of the product are enriched. The innovatively designed conveyor line provides space for the setting of the lifting mechanism. And by using their positional relationship, the stacked pallets conveyed on the conveyor line can be effectively split. Moreover, during the entire splitting process, no lateral impact force is generated on the stacked pallets, neither damaging the stacked pallets nor causing displacement, inclination, etc. of the pallets on other layers. At the same time, there is no need to use a baffle outside the conveyor line to block, further reducing the impact. Finally, after each splitting, the pallet can be guaranteed to be in the same position on the conveyor line, ensuring the position consistency of the pallet and facilitating subsequent feeding control.

[0044] The conveyor line of this solution adopts an optimized structure. On the one hand, it can be driven by one power source. At the same time, the gap between the sprockets at both ends of the conveyor line can be conveniently adjusted to improve the tension of the chain, thereby providing effective support.

[0045] This solution adopts a unique support mechanism, which can effectively utilize the structural characteristics to provide support, thereby protecting the cylinder. It not only ensures the reliability of the support but also avoids damage to the cylinder shaft caused by the load, ensuring effective use.

[0046] The added lifting device in this solution can effectively achieve feeding while splitting, improving the splitting beat of the device, and thus being conducive to accelerating the splitting rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG. 1 is a perspective view of the present invention;

[0048] FIG. 2 is a side view of the present invention;

[0049] FIG. 3 is a top view of the present invention;

[0050] Figure 4 is an end view of the second conveyor line of the present invention;

[0051] Figure 5 is an end view of the present invention (hiding the carton feeder);

[0052] Figure 6 Partial side view of the stacking pallet splitting device of the present invention;

[0053] Figure 7It is the top view of the stacking pallet splitting device of the present invention;

[0054] Figure 8 is the side view of the stacking pallet splitting device of the present invention in the state of having a stacking pallet and a pre-stacking pallet;

[0055] Figure 9 is the side view of the stacking pallet splitting device of the present invention without showing the stacking pallet;

[0056] Figure 10 is Figure 9 the enlarged view of area A in it;

[0057] Figure 11 It is the end view of the lifting mechanism of the stacking pallet splitting device of the present invention;

[0058] Figure 12 It is the top view of the support mechanism of the stacking pallet splitting device of the present invention;

[0059] Figure 13 It is the end view of the lifting mechanism of the stacking pallet splitting device of the present invention;

[0060] Figure 14 It is the end view of the stacking pallet splitting device of the present invention. Detailed implementation manners

[0061] The objectives, advantages and features of the present invention will be illustrated and explained through the non-restrictive description of the following preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present invention, and any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

[0062] In the description of the solution, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplification of 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 cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. And in the description of the solution, with the operator as the reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0063] The pallet carton stacking device disclosed by the present invention will be described below with reference to the drawings. As shown in Figure 1 and Figure 2 shown, it includes

[0064] A carton supply machine 100 for supplying cartons 200;

[0065] The first conveyor line 300 is used to convey the pallet 400. One end of it is arranged adjacent to the carton supply machine 100. The conveying surface of the first conveyor line 300 is located below the carton outlet 1001 of the carton supply machine 100 and has a hollow area 301.

[0066] The second conveyor line 500 is located at the hollow area 301 and is adjacent to the carton outlet 1001 of the carton supply machine 100.

[0067] In the first state, the conveying surface of the second conveyor line 500 is lower than the conveying surface of the first conveyor line 300.

[0068] In the second state, the conveying surface of the second conveyor line 500 is higher than the conveying surface of the first conveyor line 300 and the top surface of the pallet 400 on it is lower than the bottom surface of the carton outlet of the carton supply machine 100.

[0069] Among them, the carton supply machine 100 can be known carton supply equipment, which is known technology and will not be elaborated here.

[0070] As shown in the appendix Figure 3 As shown, the first conveyor line 300 includes a frame 302 and a first conveying part and a second conveying part which are located on both sides of the frame 302 and have a gap. The gap between the first conveying part and the second conveying part is the hollow area 301. The two first conveying parts and the second conveying part can be independent belt conveyor lines, roller conveyor lines, chain plate conveyor lines, etc.

[0071] As shown in the appendix Figure 3 As shown, preferably, both the first conveying part and the second conveying part are chain conveyor lines, which include sprockets 303, 304 arranged at both ends on one side of the frame 302. Chains (not shown in the figure) are arranged on the sprockets 303, 304. The sprocket 303 is fixed on the frame through a support shaft 305, and the support shaft 305 can move along the extension direction parallel to the first conveyor line 300. Specifically, the outer end of the support shaft 305 is connected to an adjustment screw 306 in the form of a movable nut and screw of a lead screw. The adjustment screw 306 is rotatably arranged on a fixed seat 307 located outside the frame 302.

[0072] As shown in the appendix Figure 3 As shown, the two sprockets 304 at the same end of the first conveying part and the second conveying part are arranged on a rotating shaft 308. The rotating shaft 308 is rotatably mounted on the frame 302. And the rotating shaft 308 is connected to a motor 309 that drives it to rotate. The motor can be directly connected to one end of the rotating shaft 308, or can be connected to the rotating shaft 308 through a transmission mechanism composed of a sprocket 310 and a chain or a pulley and a belt.

[0073] As shown in the appendix Figure 3 On both sides of the first conveyor line, there are limiting screws 311 located above the conveying surface and extending from one end to the other end of the second conveyor line 500. The two ends of the two limiting screws 311 form a flared mouth.

[0074] As shown in the appendix Figure 4 As shown, the second conveyor line 500 can also be various known conveyor lines, such as a belt conveyor line, a roller conveyor line, etc. Its conveying direction is parallel or perpendicular to the conveying direction of the first conveyor line 300. Preferably, the conveying direction is parallel. Specifically, the second conveyor line 500 includes a bracket 501. On both sides of the bracket 501, there are a third conveying part and a fourth conveying part. Both the third conveying part and the fourth conveying part are belt conveyor lines, which include a row of supporting rollers 503 and a belt 504. The supporting rollers 503 are rotatably arranged on one side of the bracket 501, and its circumferential surface has a groove 502. The belt 503 is looped around the supporting rollers 503. Compared with the traditional belt conveyor line with only one wide belt, the belt conveyor line in this solution uses two short belts, which is more cost-saving and economical. The middle suspended part of the original one belt is prone to damage, and the quality requirement for the belt itself is high. The belt setting method of the present invention reduces the loss of the belt while not affecting the conveying, and it is more convenient to replace even if there is loss. Multiple supporting rollers 503 are provided to support the belt 504 throughout the process to ensure the stability of the conveying. When a certain supporting roller 503 is damaged, it is also convenient to replace, reducing the impact on the entire conveyor line.

[0075] Moreover, the diameter of the supporting rollers in the middle area is smaller than the diameter of the supporting rollers at both ends, and their tops are at the same height, so as to reduce the friction between the middle supporting rollers and the belt and reduce wear while ensuring the support for the belt.

[0076] At the same time, as shown in the appendix Figure 4 As shown, the third conveying part and the fourth conveying part are driven by a motor 505. The motor 505 is connected to a rotating shaft 506. The motor 505 can be connected to the rotating shaft 506 through a transmission structure composed of a sprocket 502 and a chain. The rotating shaft 506 is rotatably mounted on the frame 501, and a supporting roller 503 is respectively arranged in the areas at both ends of it.

[0077] The second conveyor line 500 is disposed on a lifting mechanism 507 that drives its lifting. The lifting mechanism 507 includes a cylinder with a fixed position, and its cylinder shaft is connected to the center position at the bottom of the bracket 501 of the second conveyor line 500. Moreover, a guide rail (not shown in the figure) is provided at the bottom of the bracket 501, and the guide rail is slidably inserted into a guide sleeve with a fixed position (not shown in the figure).

[0078] Further, as shown in the appended Figure 1 , appended Figure 2 figures, in order to ensure that the position of the carton on the second conveyor line 500 is in the center position, therefore, positioning mechanisms 600 for centering the cartons on the second conveyor line 500 are provided on both sides of the first conveyor line 300.

[0079] As shown in the appended Figure 5 figures, the positioning mechanism 600 includes first cylinders 601 respectively fixed to both sides of the first conveyor line 300 through mounting plates 604. The cylinder shafts of the first cylinders 601 extend along the axial direction Z and are connected to second cylinders 602. The cylinder shafts of the second cylinders 602 extend in a direction perpendicular to the first conveyor line and are connected to L-shaped positioning members 603. The bottom plate 6031 of the L-shaped positioning member 603 has a cutting edge 6032 facing the first conveyor line.

[0080] Further, as shown in the appended Figure 1 , appended Figure 2 figures, a third conveyor line 700 for docking with the second conveyor line 500 is further provided in the hollow area 301 of the first conveyor line. The conveying direction of the third conveyor line 700 is perpendicular to the conveying direction of the first conveyor line 300.

[0081] In the third state, the conveying surface of the third conveyor line 700 is lower than the conveying surface of the first conveyor line 300.

[0082] In the fourth state, the conveying surface of the third conveyor line 700 is higher than the conveying surface of the first conveyor line 300 and not higher than the conveying surface of the second conveyor line 500 in the second state.

[0083] The third conveyor line 700 can also be various known conveyor lines, such as a belt conveyor line, a roller conveyor line or a chain plate conveyor line. As shown in the appended Figure 3 figures, preferably, the third conveyor line 700 is a roller conveyor line. The roller conveyor line 700 includes a frame 701. A group of rollers 702 with the same height and parallel to each other are rotatably provided on the frame 701. One of the rollers 702 is connected to a motor that drives its self-rotation, and adjacent rollers 702 are connected through a transmission mechanism composed of a sprocket and a chain.

[0084] As shown in the appended Figure 6As shown, a second lifting device is provided at the bottom of the frame 701 of the third conveyor line 700. The second lifting device is a cylinder 703. Of course, it can also be an oil cylinder or a hydraulic cylinder, etc. Four guide shafts 704 are provided at the top of the frame 701, and the guide shafts are slidably inserted into the bushings 705.

[0085] Furthermore, the input end of the first conveyor line 300 is connected to the pallet output end of the stacked pallet splitting device 800. The stacked pallet splitting device 800 splits the stacked pallets one by one and outputs them to the first conveyor line 300 for conveying.

[0086] As shown in the attached Figure 7 and attached Figure 8 shown, the stacked pallet splitting device 800 includes

[0087] A fourth conveyor line 1, having a structure for driving the stacked pallets 10 located thereon to convey, and its conveying surface has a hollow part 11.

[0088] A lifting mechanism 2, having a structure for driving the stacked pallets on the fourth conveyor line 1 to lift and lower. It is located at the hollow part 11, and it has two lifting actions to switch its top surface 21 between the first height, the second height, and the third height that increase in sequence. The first height is not higher than the conveying surface of the fourth conveyor line 1, the second height is higher than the conveying surface of the fourth conveyor line 1, and the third height is preferably the second height plus the height of one pallet.

[0089] A support mechanism 3, provided on both sides of the fourth conveyor line 1.

[0090] When the top surface 21 of the lifting mechanism 2 is at the second height, the support mechanism 3 applies an upward support force to the second-to-last one of the stacked pallets on the lifting mechanism 2.

[0091] When the top surface 21 of the lifting mechanism 2 is at the first height and the third height, the support mechanism 3 does not apply a support force to the stacked pallets.

[0092] Among them, as shown in the attached Figure 7 shown, the fourth conveyor line 1 includes a first conveying part 12 and a second conveying part 13 arranged at intervals. The gap between the first conveying part 12 and the second conveying part 13 is the above-mentioned hollow part 11. And the first conveying part 12 and the second conveying part 13 can be various known conveyor lines, such as a belt conveyor line, a roller conveyor line, or a chain conveyor line, etc. And the first conveying part 12 and the second conveying part 13 can respectively have power sources, or they can share the same power source. Preferably, they have a common power source 14.

[0093] Specifically, as shown in the attached Figure 7 and attached Figure 9As shown, the fourth conveyor line 1 includes a bracket 15. On both sides of the bracket 15, a first conveyor section 12 and a second conveyor section 13 are respectively provided. The first conveyor section 12 and the second conveyor section 13 have the same structure. They respectively include a cuboid frame 16 with a through hole in the middle. Both ends of the frame 16 have gaps. At the gap at one end of the frame, a support shaft 17 is erected. A sprocket 18 is rotatably arranged on the support shaft 17. At the gap at the other end of the frame, a rotating shaft 19 is rotatably erected. A sprocket 110 corresponding to the sprocket 18 at the other end is arranged on the rotating shaft 19. Chains (not shown in the figure) are sleeved on the sprockets 18 and 110 at both ends. The rotating shaft 19 is connected to a power source 14 that drives its rotation. The power source 14 is a motor, and it is connected to the rotating shaft 19 through a transmission structure composed of a sprocket 120 and a chain (not shown in the figure).

[0094] In addition, in order to facilitate the installation of the chains onto the sprockets 18 and 110 at both ends and adjust the tension of the chains as needed to ensure sufficient support strength, the position of the support shaft 17 can be moved along the conveying direction parallel to the fourth conveyor line 1, so as to adjust the distance between the two sprockets 18 and 110. Specifically, as shown in the appendix Figure 10 As shown, one end of the support shaft 17 extending to both sides of the frame 16 is connected to an adjusting screw 130. The connection structure between the adjusting screw 130 and the support shaft 17 is connected in accordance with the connection method of the screw rod and the movable nut of the lead screw. Thus, by rotating the adjusting screw 130, the position of the support shaft 17 on the adjusting screw 130 can be adjusted. The adjusting screw 130 is rotatably arranged on a connecting seat 140 fixed on the outer wall of the frame 16. When the adjusting screw 130 rotates, its position on the connecting seat 140 does not move. A waist-shaped hole 1401 for the support shaft 17 to pass through and move is provided on the connecting seat 140. The position of the support shaft 17 is also fixed by a nut 150 and a gasket 160.

[0095] Moreover, in order to provide sufficient support for the chains on the sprockets 18 and 110 at both ends, as shown in the appendix Figure 7 As shown, a support bar 180 is further provided on the top of the cuboid frame 16. The support bar 180 can be made of a Teflon material, so that the self-lubricating property of the Teflon material can be utilized to reduce the friction between the support bar 180 and the chains and reduce the wear of the parts. Of course, it can also be obtained by depositing a diamond-like coating or coating a Teflon coating on a metal bar to obtain the support bar 180.

[0096] Of course, in other embodiments, in order to improve the support strength of the first conveying unit 12 and the second conveying unit 13, the first conveying unit 12 and the second conveying unit 13 can respectively adopt a roller conveyor line or a chain conveyor line. Preferably, as shown in the attached drawings, the first conveying unit and the second conveying unit 13 are chain conveyor belts.

[0097] As shown in the attached Figure 11 drawings, the lifting mechanism 2 includes a support frame 22. A primary lifting device 23 is provided on the support frame 22. A secondary lifting device 24 is provided on the primary lifting device 23. The primary lifting device 23 includes cylinders 231 and 232 mounted on a mounting plate 221 of the support frame 22. The cylinder shafts of the cylinders 231 and 232 are connected to a carriage 233. The secondary lifting device 24 includes a secondary cylinder 241 provided on the carriage 233 and located between the cylinders 231 and 232. The cylinder shaft of the secondary cylinder 241 is connected to the central position of an H-shaped base frame 24. At least two support plates 243 extending along the conveying direction of the fourth conveying line 1 are provided on the H-shaped base frame 242. A buffer pad 244 is provided on the support plate 243. The upper surface of the buffer pad 244 is the top surface 21 of the lifting mechanism 2.

[0098] And, as shown in the attached Figure 11 drawings, a set of coaxial guide sleeves 25 are respectively provided on the support frame 22 and the carriage 233. A guide post 26 fixed on the H-shaped base frame 2421 is slidably inserted into the coaxial guide sleeves 25.

[0099] As shown in the attached Figure 12 drawings, the support mechanism 3 includes at least four L-shaped support rods 31 distributed in a rectangular shape, which are respectively located on both sides of the fourth conveying line 1. The main rods 311 of the support rods 31 on the same side of the fourth conveying line 1 are pivotally connected to a mounting plate 32 whose position is fixed on the side frame of the support frame 22 in a region near the turning point. The mounting plate 32 extends along the conveying direction parallel to the fourth conveying line 1. The tail ends 312 of the support rods 31 are pivotally connected to a transmission rod 33. The transmission rod 33 is parallel to the mounting plate 32. And one end of the transmission rod 33 is pivotally connected to the cylinder shaft of a driving cylinder 34. The cylinder shaft of the driving cylinder 34 is parallel to the transmission rod 33.

[0100] The reason for adopting this structure is that, compared with the following method of directly supporting with a cylinder, this structure has fewer power sources, and the pressure of the stacked pallet is mainly applied to the mounting plate 32, with minimal effect on the cylinder shaft. In the following method of directly supporting with the cylinder shaft, the pressure of the stacked pallet is all applied to the cylinder shaft, resulting in a large load on the cylinder shaft. Long-term use will cause the cylinder shaft to be bent, affecting the use of the cylinder.

[0101] When the cylinder shaft of the driving cylinder 34 retracts, the main rod 311 of the support rod 31 extends to the bottom of the pallet on the fourth conveyor line 1; when the cylinder shaft of the driving cylinder 34 extends, the support rod 31 rotates around its pivot with the mounting plate 32, and its main rod 311 moves out of the pallet on the fourth conveyor line 1.

[0102] Of course, in other embodiments, the support mechanism 3 may also be other structures. For example, it may include four cylinders arranged on both sides of the conveyor line. When the cylinder shafts of the cylinders retract, they are located outside the stacked pallets on the fourth conveyor line 1. When the cylinder shafts of the cylinders extend, they extend into the bottom of the stacked pallets, so as to provide support.

[0103] Furthermore, in order to adapt to pallets of different heights, the support mechanism 3 is arranged on a lifting structure (not shown in the figure) that drives its lifting. The lifting structure may be an electric cylinder or an oil cylinder, etc., which is known technology here and will not be elaborated.

[0104] In addition, in order to improve the splitting efficiency, when the lifting mechanism 2 and the support mechanism 3 are splitting, another pre-stacked pallet 20 to be split can be placed above the fourth conveyor line 1. However, since the conveyor line is in a working state during splitting, at this time, it is necessary to make the pre-stacked pallet 20 not move with the fourth conveyor line 1. For example, the pre-stacked pallet 20 can be blocked by a stopper, etc. However, after blocking, there will be a certain friction between the conveyor line and the bottom pallet, which will cause certain wear to both the conveyor line and the pallet, and may even cause the stacked pallet to tilt. Therefore, the pre-stacked pallet 20 is suspended above the fourth conveyor line 1 to achieve timely feeding. Correspondingly, as shown in the attached Figure 7 、attached Figure 9 As shown, a lifting device 4 is also provided at the hollow area 2 at the front end of the fourth conveyor line 1 (when the fourth conveyor line 1 conveys, the position that is passed first is the front). The top surface 41 of the lifting device 4 can be switched between a fourth height and a fifth height. The fourth height is not higher than the conveying surface of the fourth conveyor line 1, and the fifth height is higher than the conveying surface of the fourth conveyor line 1.

[0105] Specifically, as shown in the attached Figure 13 As shown, the lifting device 4 includes a cylinder 42 fixed to the bracket 15 and located below the conveyor line. The cylinder shaft of the cylinder 42 is connected to the center point of an H-shaped bracket 43. Two support plates 44 extending along the conveying direction of the conveyor line are arranged on the H-shaped bracket 43. A buffer pad 45 is arranged on the upper surface of the support plate 44, and the upper surface of the buffer pad 45 is the top surface 41 of the lifting device 4.

[0106] Further, in order to protect the stacked pallets located on the fourth conveyor line 1 and prevent the overly high pallets from falling out of the fourth conveyor line 1, as shown in the appendix Figure 14 as shown, protective partitions 5 are respectively arranged on both sides of the fourth conveyor line 1. The protective partitions 5 are frame structures composed of crisscrossed round tubes, and the openings at both ends of the protective partitions 5 on both sides are flared. At the same time, in order to facilitate the adaptation to pallets of different sizes, the distance between the protective partitions 5 on both sides can be adjusted. Specifically, the protective partitions 5 are fixed on the tripods 8 located on both sides of the fourth conveyor line 1 through a set of screws 6 and nuts 7. By adjusting the installation position of the screws 6 on the tripods 8, the distance between the protective partitions 5 can be adjusted. Moreover, one side of the material lifting device 4 does not have the protective partition 5, which facilitates loading.

[0107] Finally, when the entire stacked pallet splitting device is working, through various known control devices (not shown in the figure), such as PLC or a computer equipped with control software, the start-stop or working state switching of each cylinder, motor, etc. is controlled. And various sensors can be combined to send corresponding control commands to various control devices for switching. This is known technology and will not be elaborated here.

[0108] During the working process of the entire device, the start-stop and working state switching of each cylinder or motor can be controlled through a control device (not shown in the figure), such as PLC or a computer equipped with control software, in combination with various sensors. This is known technology and will not be elaborated here.

[0109] The splitting method of the stacked pallet splitting device will be elaborated in detail below, including the following steps:

[0110] S00, when the fourth conveyor line 1 is in a stopped state, the stacked pallet is placed on the fourth conveyor line 1 manually or through an automated device. At this time, the top surface 41 of the material lifting device 4 is located below the conveying surface of the fourth conveyor line 1, that is, the cylinder shaft of the cylinder 42 retracts, and the top surface of the lifting mechanism 2 is at a first height, that is, located below the conveying surface of the fourth conveyor line 1.

[0111] S10, the motor of the fourth conveyor line 1 is started, and the chain is driven to rotate through the transmission structure. When the stacked pallet located thereon moves towards the lifting mechanism 2 and reaches directly above the lifting mechanism 2, the motor stops, and the fourth conveyor line 1 stops conveying.

[0112] S20, the cylinder shafts of the cylinders 231 and 232 of the lifting mechanism 2 extend, causing the carriage 233 to lift, and further causing the top surface 21 of the lifting mechanism 2 to rise to the second height. The buffer pads 2423 of the lifting mechanism 2 contact the stacked pallet 10 on the fourth conveyor line 1 during the lifting process. As the top surface of the lifting mechanism 2 rises to the second height, the lifting mechanism 2 jacks up the stacked pallet on the fourth conveyor line 1 to the second height where it is disengaged from the fourth conveyor line 1.

[0113] S30, at this time, the cylinder shaft of the cylinder 34 of the support mechanism 3 switches from the extended state to the retracted state, causing the four support rods 31 to extend into the bottom of the penultimate pallet 102.

[0114] S40, then, the cylinder shafts of the cylinders 231 and 232 of the lifting mechanism 2 retract, causing the top surface of the lifting mechanism to move to the first height. At this time, the support rods 31 restrict the movement of the penultimate pallet 102 and the pallets located above it. The bottommost pallet 101 follows the lifting mechanism 2 and drops back onto the fourth conveyor line 1 for conveying.

[0115] S50, as the pallet on the fourth conveyor line 1 moves out from directly below the stacked pallet 10, the cylinder shafts of the cylinders 231, 232 and the secondary cylinder 241 of the lifting mechanism 2 extend, causing the top surface of the lifting mechanism 2 to move to the third height. At this time, the lifting mechanism provides support for the remaining stacked pallet 10.

[0116] S60, then, the cylinder shaft of the cylinder 34 of the support mechanism 3 extends, causing the support rods 31 to move out from the bottom of the pallet.

[0117] S70, subsequently, the top surface of the lifting mechanism 2 drops to the second height.

[0118] S80, by repeatedly executing steps S3-S7, the splitting can be continuously carried out.

[0119] Furthermore, the splitting method of the stacked pallet splitting device in this solution further includes step S9.

[0120] When there is a stacked pallet 10 on the lifting mechanism 2, the cylinder shaft of the cylinder 42 of the lifting device 4 extends, causing its top 41 to remain at the fifth height. At this time, a pre-stacked pallet 20 can be placed on the top of the lifting device 4 by a forklift.

[0121] When the splitting of the stacked pallet 10 on the lifting mechanism 2 is completed, the cylinder shaft of the cylinder 42 of the lifting device 4 retracts, and the top of the lifting device 4 moves down to the fourth height. The pre-stacked pallet 20 on it drops back onto the fourth conveyor line 1 for conveying as its top surface descends.

[0122] This solution further discloses the stacking method of the pallet carton stacking device, including the following steps:

[0123] S0. The pallet output by the fourth output line of the stacking pallet splitting device is conveyed to the first conveyor line. At this time, both the second conveyor line and the third conveyor line remain at a low position.

[0124] S1. The first conveyor line drives the pallet to move towards the carton supply machine until the pallet moves above the second conveyor line and stops.

[0125] S2. The lifting mechanism 507 at the bottom of the second conveyor line jacks up, causing the entire second conveyor line to rise, and the pallet on the first conveyor line is disengaged from the first conveyor line and jacked up to be flush with the outlet of the carton supply machine.

[0126] S3. The carton supply machine conveys a carton onto the pallet on the second conveyor line.

[0127] S4. The cylinder shaft of the first cylinder 601 of the positioning mechanism 600 extends, and then the cylinder shaft of its second cylinder extends, so as to position the carton to the center position of the pallet through two opposite L-shaped positioning members 603.

[0128] S5. Simultaneously with or after S2, S3, and S4, the cylinder shaft of the cylinder 703 at the bottom of the third conveyor line extends, causing the conveying surface of the third conveyor line to rise to be flush with the conveying surface of the second conveyor line.

[0129] S6. At this time, the second conveyor line starts to transfer the pallet and the carton on it to the third conveyor line.

[0130] S7. After the third conveyor line starts to transfer the pallet and the carton outside the first conveyor line, its conveying surface drops.

[0131] S8. Repeat steps S1 - S7.

[0132] There are still many implementation manners of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the protection scope of the present invention.

Claims

1. A device for stacking cartons and pallets, characterized by: include A carton supply machine (100) for supplying cartons (200); The first conveyor line (300) is used to convey the pallet (400), one end of which is arranged adjacent to the carton supply machine (100), the conveying surface of the first conveyor line (300) is located below the carton outlet (1001) of the carton supply machine (100), and has a hollow area (301). A second conveying line (500) is located in the hollow area (301) and is adjacent to the carton outlet (1001) of the carton supply machine (100); In a first state, the conveying surface of the second conveying line (500) is lower than the conveying surface of the first conveying line (300); In the second state, the conveying surface of the second conveying line (500) is higher than the conveying surface of the first conveying line (300) and the top surface of the pallet (400) thereon is lower than the bottom surface of the carton outlet of the carton supply machine (100); The second conveyor line includes a frame and two rows of rollers arranged at both sides of the frame, each row of rollers is provided with a belt; The diameter of the rollers at the two ends of each row is larger than that of the rollers in the middle, and the tops of all the rollers are flush; Positioning mechanisms (600) for centering cartons on the second conveyor line (500) are provided on both sides of the first conveyor line (300); The positioning mechanism (600) comprises a first cylinder (601) located on both sides of the first conveying line (300), the cylinder axis of the first cylinder (601) extending in an axial direction (Z) and connected to a second cylinder (602), the cylinder axis of the second cylinder (602) extending in a direction perpendicular to the first conveying line and connected to an L-shaped positioning piece (603), the bottom plate (6031) of the L-shaped positioning piece (603) having a cutting edge (6032) facing the first conveying line; The hollow area (301) of the first conveyor line is further provided with a third conveyor line (700) connected to the second conveyor line (500), and the conveying direction of the third conveyor line is perpendicular to the conveying direction of the first conveyor line (300). In the third state, the conveying surface of the third conveying line (700) is lower than the conveying surface of the first conveying line (300); In the fourth state, the conveying surface of the third conveying line (700) is higher than the conveying surface of the first conveying line (300) and is not higher than the conveying surface of the second conveying line (500) in the second state.

2. The device for stacking cartons according to claim 1, characterized in that: The input end of the first conveying line (300) is connected to the pallet output end of the stacking pallet separating device (800).

3. The device for stacking cartons according to claim 2, wherein: The stacking tray splitting device (800) comprises The fourth conveyor line (1) has a structure for driving the stacking tray (10) located thereon to convey, and its conveying surface has a hollow portion (11). A lifting mechanism (2) having a structure for driving the stacking tray (10) on the fourth conveyor line (1) to rise and fall, the lifting mechanism (2) being located at the hollow portion (11) and having two lifting actions to switch the top surface (21) thereof between a first height, a second height and a third height which increase in sequence, the first height being no higher than the conveying surface of the fourth conveyor line (1), and the second height being higher than the conveying surface of the fourth conveyor line (1). A supporting mechanism (3) is provided on both sides of the fourth conveying line (1); When the top surface (21) of the lifting mechanism (2) is at a second height, the supporting mechanism (3) applies an upward supporting force to the second-to-last stacking tray (10) on the lifting mechanism (2); The supporting mechanism (3) does not apply a supporting force to the stacking tray when the top surface (21) of the lifting mechanism (2) is at a first height and a third height.

4. The device for stacking cartons according to claim 3, characterized in that: The hollow portion (11) is also provided with a material lifting device (4) located at the front end of the fourth conveyor line (1), and the top (41) of the material lifting device can be switched between a fourth height and a fifth height, the fourth height is not higher than the conveying surface of the fourth conveyor line (1), and the fifth height is higher than the conveying surface of the fourth conveyor line (1).

5. The stacking method of the pallet carton stacking device according to any one of claims 1 to 4, characterized in that: The steps include: S1, the first conveyor line conveys the pallet thereon to the top of the second conveyor line; S2, the conveying surface of the second conveying line moves upward to separate the pallet from the first conveying line; S3, the carton feeding machine delivers a carton to the pallet of the second conveyor line; S4, the positioning mechanism starts to position the carton in the center of the pallet; S5, the conveying surface of the third conveyor line is raised to be flush with the conveying surface of the second conveyor line; S6, the second conveyor line starts to transfer the pallets and cartons on it to the third conveyor line; S7, the third conveyor line starts to move the pallet and cartons to the outside of the first conveyor line, and its conveying surface falls back; S8, repeat steps S1-S7.

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