Steel pallet destacking device and steel pallet destacking method

Abstract

The present invention discloses a steel pallet destacking device and a steel pallet destacking method, wherein the steel pallet destacking device adopts two two-stage lifting cylinders or hydraulic cylinders to drive the lifting platform to move along the longitudinal guide rail, which can effectively improve the supporting force, thereby meeting the lifting needs of multiple stacked steel pallets. At the same time, the plug-in and removal components are arranged on the horizontal guide rail, and the horizontal guide rail can better support the plug-in and removal components, so that the plug-in and removal components have greater bearing capacity to meet the support requirements of multiple steel pallets. The structure of the present invention has good stability in use, low failure rate, simple structure, and is easy to implement.

Description

Technical Field

[0001] The present invention relates to the field of polysilicon processing equipment, in particular to a steel pallet destacking device and a steel pallet destacking method. Background Art

[0002] Pallets are used in various transportation processes, and the pallets are involved in stacking and unstacking.

[0003] The invention patent with application publication number CN112125205A discloses a stacking plate dismantling device and a stacking plate dismantling device, wherein the fork adopts a motor and a connecting rod structure to realize the state switching of the fork plate.

[0004] This structure is feasible for lighter wooden or plastic pallets, but it is not suitable for the steel pallets used in polysilicon transportation. This is because the steel pallets used in polysilicon processing are relatively heavy, weighing around 45 kilograms. Because the fork plates in the aforementioned patent are supported only at the pivot points, their stability in supporting a single steel pallet is poor. When the forks are already unstable supporting a single steel pallet, when multiple steel pallets are stacked together, they are completely unable to lift them, which may cause fork damage and make it impossible to unstack the steel pallets. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems existing in the prior art and to provide a steel pallet destacking device and a steel pallet destacking method.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A steel pallet unstacking device comprises a conveyor line and a blocker for blocking the steel pallets on the conveyor line, wherein the conveying direction of the conveyor line is defined as the Y direction, the horizontal direction perpendicular to the Y direction is defined as the X direction, and the direction perpendicular to the Y direction and the X direction is defined as the Z direction. Symmetrical steel pallet moving mechanisms are respectively provided on both sides of the X direction of the conveyor line, and the steel pallet moving mechanisms include a jacking device, and a lifting platform driven by the jacking device to reciprocate along the Z direction is connected to the top of the jacking device, and the lifting platform is movably arranged on a longitudinal guide rail, and a horizontal pushing device is provided on the lifting platform, and the pushing shaft of the horizontal pushing device extends along the X direction. The pushing shaft of the horizontal pushing device is connected to an insertion and extraction component, and the insertion and extraction component is slidably arranged on the horizontal guide rail of the lifting platform, and the horizontal guide rail extends along the X direction. The insertion and extraction component has two plugging plates symmetrically distributed on both sides of the lifting platform.

[0008] Preferably, in the steel pallet stacking device, the steel pallet includes a top frame, the top of the top frame is provided with limiting plates located at its four top corners, the bottom of the top frame is provided with at least two bottom supports matching the four limiting plates, and the bottom of each bottom support is provided with a wooden board.

[0009] Preferably, in the steel pallet unstacking device, a first photoelectric sensor and a second photoelectric sensor are provided on the side guards on both sides of the conveyor line, the first photoelectric sensor is used to detect the wooden board at the bottom of the bottom support, and the second photoelectric sensor is used to detect the bottom support of the steel pallet blocked by the blocker and is higher than the first photoelectric sensor.

[0010] Preferably, in the steel pallet unstacking device, there are two blockers located between the three conveying components of the conveyor line, and the blockers include a blocking block connected to at least two coarse guide shafts, and the coarse guide shafts are movably inserted into the shaft sleeves, and the shaft sleeves are fixed on the bracket between the two conveying components, and the bracket is provided with a lifting drive that is connected to the blocking block and drives it to rise and fall.

[0011] Preferably, in the steel pallet destacking device, the lifting device is a two-stage lifting cylinder or hydraulic cylinder.

[0012] Preferably, a limit block is provided on each of the plug-in plates, and the two limit blocks of one plug-in assembly are positioned opposite to each other in the Y direction.

[0013] Preferably, in the steel pallet unstacking device, the limit block is arranged on the inserting plate so as to be positionally adjustable along the X direction.

[0014] Preferably, the steel pallet unstacking device also includes a detection sensor for determining the extended position of the limit block, and the detection sensor is a proximity sensor, which is arranged on the lifting platform. When the proximity sensor detects the slider or connector connected to the plug-in assembly, a predetermined distance is maintained between the limit block on the plug-in plate and the steel pallet on the conveyor line.

[0015] Preferably, in the steel pallet unstacking device, the input end of the conveyor line is connected to a roller conveyor, and the roller conveyor has a transport vehicle platform for a manual transport vehicle to move in and a conveying mechanism for receiving and transporting the steel pallet dropped from the transport vehicle platform.

[0016] The steel pallet destacking method according to any of the above steel pallet destacking devices comprises the following steps:

[0017] S1, the conveyor line stops when it moves a steel pallet to a position blocked by a blocker;

[0018] S2, two lifting devices make the plug-in plates of the two plug-in and extraction components at the lowest position;

[0019] S3, two horizontal push devices drive two insertion and extraction components to move toward the steel pallet on the conveyor line;

[0020] S4, when it is determined that the inserting plates of the two inserting and removing assemblies have moved to the bottom of the top plate of the steel pallet on the conveyor line and the limit blocks on the inserting plates maintain a gap with both sides of the steel pallet, the jacking device drives the lifting platform to lift so that the inserting plates lift the steel pallet and separate it from the conveyor line. At the same time, the horizontal pushing device drives the two inserting plates to continue moving in the direction of the steel pallet until the limit blocks are in contact with both sides of the steel pallet;

[0021] S5, the conveyor line moves the next steel pallet to a position blocked by the blocker and then stops;

[0022] S6, the lifting device drives the two insertion and removal assemblies to descend so that the steel pallets on the insertion and removal assemblies fall onto the steel pallets on the conveyor line;

[0023] S7, the horizontal pushing device drives the two insertion and extraction components to retract;

[0024] S8, repeat S2-S7 until a predetermined number of the steel pallets are stacked together.

[0025] Preferably, in S5, when the second photoelectric sensor cannot detect the bottom support of the steel pallet, the conveyor line starts conveying.

[0026] The advantages of the technical solution of the present invention are mainly reflected in:

[0027] The present invention adopts two mutually opposed steel pallet moving mechanisms to cooperate in stacking the pallets, and can drive the lifting platform to move along the longitudinal guide rail through two two-stage jacking cylinders or hydraulic cylinders to increase the supporting force of the lifting platform, thereby meeting the lifting and lowering needs of multiple stacked steel pallets. At the same time, the plug-in and removal components are arranged on the horizontal guide rail, and the horizontal guide rail can better support the plug-in and removal components, so that the plug-in and removal components have greater bearing capacity to meet the support requirements of multiple steel pallets. The structure of the present invention has good stability in use, low failure rate, simple structure, and is easy to implement.

[0028] The steel pallet of the present invention is respectively provided with limit plates at the four top corners, which can effectively limit the stacked pallets, thereby improving the position matching of the steel pallets and ensuring the stability of the steel pallets when stacked. At the same time, when stacking, the position of the steel pallets on the conveyor line can be adjusted by cooperating with the limit plates through the steel pallets on the insert plates.

[0029] The present invention provides a limit block on each plug-in plate of the plug-in assembly, which can locate the position of the steel pallet when stacked, and is conducive to ensuring the stability of the stacked steel pallets.

[0030] The present invention can effectively determine whether there is a pallet in operation on the conveyor line through the cooperation of two photoelectric sensors, and can start the conveyor line to transport the next pallet to the blocker after determining that the pallet on the conveyor line is lifted to a sufficient height. This is conducive to improving the processing cycle and thus improving the stacking efficiency.

[0031] The present invention adopts two blockers, and the block is set on the coarse guide shaft and the frame, so that the impact force when the steel pallet contacts the blocker can be borne by the frame, which is beneficial to protecting the lifting drive. At the same time, the coarse guide shaft itself has good rigidity, which improves the stability and service life of the equipment. At the same time, the two blockers increase the control redundancy.

[0032] The present invention is provided with a detection sensor for detecting the extended position of the limit block, which can control the insertion and removal component to lift the steel pallet on the conveyor line when the inserting plate is extended to maintain a predetermined distance between the limit block and the two sides of the steel pallet, thereby avoiding the problem that when the limit block pushes the steel pallet to move, the chain of the conveyor line will hinder the movement of the steel pallet and affect the positioning, and the steel pallet applies an X-axis force on the chain of the conveyor line, causing the chain to be deformed and damaged, thereby ensuring the smooth realization of the positioning of the bottom steel pallet and improving the stability of the equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a perspective view of a steel pallet of the present invention;

[0034] Figure 2 This is a three-dimensional diagram of the steel pallet destacking device of the present invention, wherein part of the structure of the chassis is hidden;

[0035] Figure 3 is a perspective view of the conveyor line and the blocker of the present invention;

[0036] Figure 4 is a perspective view of the steel pallet moving mechanism of the present invention;

[0037] Figure 5 is a front view of the steel pallet moving mechanism of the present invention;

[0038] Figure 6 is a side view of the steel pallet moving mechanism of the present invention;

[0039] Figure 7 It is a top view of the steel pallet unstacking device of the present invention connected with the roller conveyor;

[0040] Figure 8 is a perspective view of the roller conveyor of the present invention;

[0041] Figure 9 is an end view of the roller conveyor of the present invention. DETAILED DESCRIPTION

[0042] The objects, advantages, and features of the present invention are illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of the application of the technical solutions of the present invention, and any technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

[0043] In the description of the scheme, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplification. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] The steel pallet unstacking device disclosed in the present invention is described below with reference to the accompanying drawings. The steel pallet unstacking device is used for unstacking a specially made steel pallet 100. Figure 1 As shown, the steel pallet 100 includes a top frame 110, and the top of the top frame 110 is provided with a limiting plate 120 located at its four top corners. The limiting plate 120 is L-shaped and the two plates of the limiting plate 120 correspond to the two side positions of the top corner where it is located. At the same time, each plate includes a vertical portion 121 and an outward bending portion 122 located above the vertical portion 121, so that when one steel pallet 100 is placed on another steel pallet 100, the outward bending portion 122 can play a guiding role so that the upper steel pallet 100 can accurately fall onto the lower steel pallet 100. At least two bottom supports 130 matching the four limiting plates 120 are provided at the bottom of the top frame 110, and a wooden board 140 is provided at the bottom of each bottom support 130. The bottom support 130 is located in the area enclosed by the four limiting plates 120, and the two bottom supports 130 on both sides are matched with the two limiting plates 120 respectively, that is, the four limiting plates 120 of the lower steel pallet 100 can limit the bottom supports 130 on both sides of the upper steel pallet 100.

[0045] As attached Figure 2 As shown, the steel pallet destacking device includes a conveyor line 200 and a blocker 300 for blocking the steel pallet 100 on the conveyor line 200. For the convenience of description, the conveying direction of the conveyor line 200 is defined as the Y direction, the horizontal direction perpendicular to the Y direction is defined as the X direction, and the direction perpendicular to the Y direction and the X direction is defined as the Z direction.

[0046] As attached Figure 3As shown, the conveyor line 200 can be a known roller conveyor, chain conveyor, etc. In the present embodiment, the conveyor line 200 includes a frame 210, and three conveyor assemblies 220 are evenly spaced on the frame 210. Each conveyor assembly 220 includes a frame 221 and a sprocket arranged at both ends of the frame 221. The sprockets are preferably double-row sprockets, and two of the double-row sprockets are fitted with chains 222. At the same time, the frame 221 has a support plate supporting the upper layer of the chains 222. The chain 222 is also connected to a drive sprocket, which is arranged on a drive shaft 230. The drive sprockets of the three conveyor assemblies 220 are concentrically arranged on a drive shaft 230. The drive shaft 230 is rotatably arranged on the frame 210 and is connected to a drive motor 250 that drives its rotation through a transmission mechanism 240. The drive motor 250 rotates the drive shaft 230, thereby driving the three drive sprockets to rotate, and finally driving the three chains 222 to rotate synchronously to convey the steel pallet 100. Of course, each chain 222 is also connected to the tensioning sprockets on both sides of the drive sprocket to keep the chain 222 in a tensioned state.

[0047] As attached Figure 3 As shown, the frame 210 is also equipped with side guards 260 located outside the conveyor assembly 220 on both sides. The side guards 260 are used to limit the position of the steel pallets 100 on the conveyor line 200 during conveyance. A first photoelectric sensor 270 and a second photoelectric sensor 280 are installed on the side guards 260 on both sides of the conveyor line 200. The first photoelectric sensor 270 is used to detect the wooden board 140 at the bottom of the base 130, and the second photoelectric sensor 280 is used to detect the base 130 of the steel pallet 100 blocked by the blocker 300 and is higher than the first photoelectric sensor. The first photoelectric sensor 270 and the second photoelectric sensor 280 are self-reflective or through-beam photoelectric sensors. They are both located near the blocker 300, with the second photoelectric sensor 280 being closer to the blocker 300 than the first photoelectric sensor 270. When the first photoelectric sensor is triggered, the blocking block 310 of the blocker 300 can move upward to block the pallet. When the second photoelectric sensor 280 is triggered, the conveyor line 200 is controlled to stop conveying. And when the second photoelectric sensor 280 fails to detect the bottom support 130 of the steel pallet 100, the conveyor line 200 is controlled to start again.

[0048] As attached Figure 3As shown, there are two blockers 300 located between the three conveyor assemblies 220 of the conveyor line 200. The blockers 300 include a block 310 connected to at least two coarse guide shafts 320. The coarse guide shafts 320 are movably inserted into sleeves 330. The sleeves 330 are fixed to a bracket 340 between the two conveyor assemblies 220. The bracket 340 is fixed to the frame 210 or fixed between the frames of the conveyor assemblies. The bracket 340 is provided with a lifting drive 350 that connects to the block 310 and drives it to rise and fall. Furthermore, the block 310 is a step block with a notch facing the input end of the conveyor line 200. When the steel pallet 100 is blocked by the block 310, the top frame 110 of the steel pallet 100 is located at the notch.

[0049] As attached Figure 2 , Attachment Figure 4 -Attached Figure 6 As shown, a steel pallet moving mechanism 400 is provided on both sides of the conveyor line 200 in the X direction. The two steel pallet moving mechanisms 400 are symmetrically arranged. The steel pallet moving mechanisms 400 include a lifting device 410. To ensure sufficient support force and achieve unstacking, the lifting device 410 is preferably a two-stage lifting cylinder or hydraulic cylinder. A two-stage lifting cylinder is preferably used, as this simplifies control during unstacking.

[0050] Connected above the lifting device 410 is a lifting platform 420, which is driven by the lifting device to reciprocate in the Z direction. The lifting platform 420 includes a vertical plate 421, with a carrier plate 422 connected to the side of the vertical plate 421. The bottom of the carrier plate 422 is connected via a reinforcing plate 423 that is perpendicular to both the vertical plate 421 and the carrier plate 422. The lifting platform 420 is movably mounted on a longitudinal guide rail 430, which utilizes a known HGR45 linear guide to ensure long-term stable load bearing. The lifting platform 420 is provided with a horizontal pushing device 440, and the horizontal pushing device 440 is preferably a cylinder. The pushing shaft of the horizontal pushing device 440 extends along the X direction. The pushing shaft of the horizontal pushing device 440 is connected to the plug-in component 450. The plug-in component 450 is slidably arranged on the horizontal guide rail 460 on the lifting platform 420. The horizontal guide rail 460 extends along the X direction. The horizontal guide rail 460 preferably adopts the known HGR35 linear guide rail to ensure long-term stable load bearing.

[0051] The insertion and extraction assembly 450 includes a flat plate 451 extending in the Y direction. The pushing shaft of the horizontal pushing device 440 is connected to a connecting member 470, and the connecting member 470 is connected to the front end of the flat plate 451 facing the conveyor line 200. The flat plate 451 is provided with a reinforcing rod 452 extending in the Y direction. The bottom of the flat plate 451 is connected to the slider of the horizontal guide rail 460 via an adapter plate 453. The bottom of the flat plate 451 is also provided with two columns 454 located on both sides of the lifting platform 420. The bottom of the columns 454 is connected to an insert plate 455, and the insert plate 455 is further connected to the columns 454 via a triangular reinforcement plate 456. The two insert plates 455 are symmetrically distributed on both sides of the lifting platform 420. Each insert plate 455 is provided with a limit block. The two limit blocks of an insertion and extraction assembly are positioned opposite each other in the Y direction. The stopper includes a mounting seat 457. A contact plate 458 is provided on the end surface of the mounting seat 457 facing the conveyor line 200. The contact plate 458 can be made of rubber, silicone, or other materials. The stopper is mounted on the insert plate 455 so that its position can be adjusted along the X-direction. Specifically, the mounting seat 457 is provided with a set of waist-shaped holes 459 extending along the X-direction. The insert plate 455 is provided with a connecting hole corresponding to each waist-shaped hole 459. The mounting seat 457 can be fixed by adjusting the corresponding position of the connecting hole and the waist-shaped hole 459 and then locking them with bolts and nuts.

[0052] Of course, since the mounting seat 457 is movable in the X direction, it is likely to move due to force during positioning. Correspondingly, the insert plate 455 is also provided with a support block 45a located between the limit block and the column 454. The support block 45a is screwed with a bolt that abuts the limit block. The bolt can effectively support the limit block during positioning, thereby preventing its position change from affecting the positioning accuracy.

[0053] As attached Figure 6 As shown, the steel pallet unstacking device further includes a detection sensor 480 for determining the extended position of the stop block. The detection sensor 480 is a proximity sensor disposed on the lifting platform 420. When the proximity sensor detects the slider or connector 470 connected to the insertion and removal assembly 450, a predetermined distance is maintained between the stop block on the insertion plate 455 and the steel pallet 100 on the conveyor line 200.

[0054] As attached Figure 2 As shown, the two steel pallet moving mechanisms are respectively arranged in a chassis 500, and the plugboard can extend out of the chassis 500. At the same time, a guardrail 600 located above the blocker is also provided between the two chassis 500 to prevent the stacked steel pallets from tilting and falling.

[0055] When using the steel pallet destacking device, the input end of the conveyor line 200 of the steel pallet destacking device is connected to other conveying equipment for conveying steel pallets 100, and then the steel pallets 100 are conveyed one by one to the conveyor line 200. After the steel pallet destacking device is started, the conveyor line 200 can maintain the conveying state.

[0056] As attached Figure 7 As shown, when the steel pallets need to be moved to the steel pallet unstacking device for stacking, in some scenarios, a known manual transport vehicle 700 is used to transport the steel pallets. The two transport forks of the manual transport vehicle 700 can be inserted into the gap between the bottom supports of the steel pallet and the steel pallet can be lifted and lowered by lifting the transport forks. Its structure is a known technology and will not be described here. However, the manual transport vehicle 700 cannot directly place the steel pallets on it into the conveyor line 200 for transportation. In order to facilitate the transfer of the steel pallets to the conveyor line 200, the input end of the conveyor line 200 is also connected to the roller conveyor 800. The roller conveyor 800 is set on the base 900, and the conveying surface of the roller conveyor 800 matches the height of the conveying surface of the conveyor line.

[0057] As attached Figure 8 , Attachment Figure 9 As shown, the roller conveyor includes two trolley platforms 810 with gaps, and the manual transport vehicle 700 can move onto the two trolley platforms 810. A row of first rollers 820 with gaps and parallel axes are respectively provided on the outer sides of the two trolley platforms 810, and a row of second rollers 830 with gaps and parallel axes are provided between the two trolley platforms 810. The second rollers 830 are provided on a U-shaped frame between the two trolley platforms. The tops of the first rollers and the tops of the second rollers are at the same height and are located above the top surfaces of the trolley platforms 810. The axes of the first rollers 820 and the second rollers 830 are perpendicular to the conveying direction of the conveyor line. When the manual transport vehicle 700 is located on the trolley platforms 810, the three bottom supports 130 of the steel pallet 100 thereon correspond to the positions of the two rows of first rollers 820 and the row of second rollers 830, respectively. Therefore, when the manual transport vehicle 700 drops the steel pallet on it, the bottom supports of the steel pallet can fall on the first rollers 820 and the second rollers 830. At this time, the steel pallet may be driven to move toward the conveyor line 200 by the first roller 820 and / or the second roller 830 .

[0058] In addition, in order to enable the manual transport vehicle 700 and the steel pallet thereon to be accurately moved into position, a first bracket 840 is further provided between each transport vehicle platform 810 and the first roller 820 on its outer side, and a first guide member 850 is provided on the top of each first bracket 840. The extension direction of the first guide member 850 is perpendicular to the axis of the first roller 820. The opposite sides of the first guide member 850 have a guide slope 851 extending a certain distance from the first end of the guide member to the second end and a first side limiting surface 852 connected to the guide slope 851. The two guide slopes 851 are in an eight-shape and make the first end of the first guide member 850 present as a trapezoid with a narrow outer end and a wide inner end. The first side limiting surface 852 is perpendicular to the axis of the first roller 820. One end of each row of the first rollers 820 is arranged on the first bracket 840, and the other end is arranged on the second bracket 860. A second guide member 870 is arranged on the top of each second bracket 860. The second guide member 870 has a side guide surface 871 that cooperates with the guide slope 851 to form a bell mouth and a second side limiting surface 872 connected with the side guide surface 871. The second side limiting surface 872 is parallel to the first side limiting surface 852.

[0059] When the steel pallet is driven to move by the first roller 820 and / or the second roller 830, it is preferable to drive the steel pallet by the first roller 820. At this time, part or all of the first roller 820 can be an electric roller, and the electric roller and the unpowered roller can be connected through a transmission mechanism composed of a gear transmission mechanism or a sprocket chain.

[0060] More preferably, to reduce the power source and simplify the structure, a third roller 880 is further provided between the two second brackets 860, downstream of the first roller 820 and the second roller 830. The third roller 880 is parallel to the first roller 820, and the top of the third roller is flush with the tops of the first and second rollers. One end of one of the third rollers 880 is connected to a motor 890 that drives its rotation via a transmission mechanism consisting of a gear transmission mechanism or a sprocket chain. Adjacent third rollers in a group are torque-connected via a torque transmission mechanism. Simultaneously, one third roller 880 is torque-connected to one of a row of first rollers 820 via a torque transmission mechanism, and two adjacent first rollers in the row are torque-connected. Adjacent first rollers in another row of first rollers 820 are torque-connected, and one of the first rollers in the row is torque-connected to the second end of the third roller 880. The first and third rollers, the structure that drives their rotation, and the second roller together constitute a conveying mechanism.

[0061] The torque transmission mechanism is also provided at both ends of the third roller. The second guide member 870 covers the torque transmission mechanism connected between the first rollers 820, between the third rollers 880, and between the third rollers 880 and the first rollers. Furthermore, a limit block 801 is provided on the transport platform near the third roller to limit the position of the manual transport vehicle.

[0062] Furthermore, sensors, such as proximity sensors and beam sensors, may be installed on the roller conveyor 800 to determine whether a steel pallet has fallen onto the first and second rollers. The specific installation locations and types of the sensors can be designed as needed and are not limited here. When the sensors sense that a steel pallet has fallen onto the roller conveyor, the roller conveyor can be activated for conveying as needed.

[0063] Correspondingly, the steel pallet destacking method of the above-mentioned steel pallet destacking device includes the following steps:

[0064] S0, the steel pallet is moved to the roller conveyor 800 by the manual transport vehicle 700, and the manual transport vehicle is manually operated to drop the steel pallet onto the roller conveyor. The roller conveyor 800 starts to transfer the steel pallet to the conveyor line 200.

[0065] S1, the conveyor line 200 stops when it moves the steel pallet 100 to a position blocked by the blocker 300; at this time, the conveying equipment docked with the conveyor line 200 also stops conveying.

[0066] S2, at this time, the two jacking devices 410 make the plugging plates 455 of the two plug-in and extraction components 450 located at the lowest position. At this time, the top surfaces of the two plugging plates 455 are slightly lower than the bottom of the top frame 110 of the steel pallet 100 on the conveyor line 200.

[0067] S3, then, the two horizontal pushing devices 440 start to drive the two insertion and extraction components 450 to move toward the steel pallet 100 on the conveyor line 200.

[0068] S4, when it is determined that the inserting plates 455 of the two plug-in and removing components 450 move to the bottom of the top plate of the steel pallet 100 on the conveyor line 200 and the limit blocks on the inserting plates 455 maintain a gap with both sides of the steel pallet 100, the gap is preferably between 1-2 cm. At this time, the lifting device 410 drives the lifting platform 420 to lift so that the inserting plates 455 lift the steel pallet 100 and separate it from the conveyor line 200. At the same time, the pushing device 440 drives the two inserting plates 455 to continue to move toward the steel pallet 100 until the limit blocks are in contact with both sides of the steel pallet 100, thereby realizing the positioning of the steel pallet 100 through four limit blocks.

[0069] S5, when the second photoelectric sensor 280 cannot detect the bottom support 130 of the steel pallet 100, the conveyor line 200 starts conveying, and the conveyor line 200 moves the next steel pallet 100 to a position blocked by the blocker 300 and then stops conveying, and then the conveyor line 200 stops conveying.

[0070] S6, the lifting device 410 drives the two insertion and extraction components 450 to descend so that the steel pallet 100 on the insertion and extraction components 450 falls onto the steel pallet 100 on the conveyor line 200.

[0071] S7, the horizontal pushing device 440 drives the two insertion and extraction components 450 to retract.

[0072] S8, repeat S2-S7 until a predetermined number of the steel pallets 100 are stacked together.

[0073] There are many implementation methods of the present invention, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A steel pallet unstacking device, comprising a conveyor line and a blocker for blocking the steel pallets on the conveyor line, characterized in that: The conveying direction of the conveyor line is defined as the Y direction, the horizontal direction perpendicular to the Y direction is defined as the X direction, and the direction perpendicular to the Y direction and the X direction is defined as the Z direction. Symmetrical steel pallet moving mechanisms are respectively provided on both sides of the X direction of the conveyor line. The steel pallet moving mechanism includes a jacking device, and the upper part of the jacking device is connected to a lifting platform driven by the jacking device to reciprocate along the Z direction. The lifting platform is movably arranged on a longitudinal guide rail, and a horizontal pushing device is provided on the lifting platform. The pushing shaft of the horizontal pushing device extends along the X direction, and the pushing shaft of the horizontal pushing device is connected to an insertion and removal component. The insertion and removal component is slidably provided on the horizontal guide rail of the lifting platform, and the horizontal guide rail extends along the X direction. The insertion and removal component has two plugging plates symmetrically distributed on both sides of the lifting platform; A limit block is provided on each plug-in board, and the two limit blocks of one plug-in assembly are positioned opposite to each other in the Y direction; It also includes a detection sensor for determining the extended position of the limit block; the detection sensor is a proximity sensor, which is arranged on the lifting platform. When the proximity sensor detects the slider or connector connected to the plug-in assembly, a predetermined distance is maintained between the limit block on the plug-in plate and the steel pallet on the conveyor line.

2. The steel pallet unstacking device according to claim 1 is characterized in that: the steel pallet includes a top frame, the top of the top frame is provided with limit plates located at its four top corners, the bottom of the top frame is provided with at least two bottom brackets matching the four limit plates, and the bottom of each bottom bracket is provided with a wooden board.

3. The steel pallet unstacking device according to claim 2 is characterized in that: a first photoelectric sensor and a second photoelectric sensor are provided on the side guards on both sides of the conveyor line, the first photoelectric sensor is used to detect the wooden board at the bottom of the bottom support, and the second photoelectric sensor is used to detect the bottom support of the steel pallet blocked by the blocker and is higher than the first photoelectric sensor.

4. The steel pallet unstacking device according to claim 1 is characterized in that: there are two blockers and they are located between the three conveying components of the conveying line, the blockers include a blocking block, the blocking block is connected to at least two coarse guide shafts, the coarse guide shaft is movably inserted on the shaft sleeve, the shaft sleeve is fixed on the bracket between the two conveying components, and the bracket is provided with a lifting drive that connects the blocking block and drives it to rise and fall.

5. The steel pallet destacking device according to claim 1, characterized in that the lifting device is a two-stage lifting cylinder or hydraulic cylinder.

6. The steel pallet destacking device according to claim 1, characterized in that the limit block is arranged on the inserting plate so as to be positionally adjustable along the X direction.

7. The steel pallet destacking device according to any one of claims 1 to 6, characterized in that: The input end of the conveying line is connected to a roller conveyor. The roller conveyor has a transport vehicle platform for a human transport vehicle to move into and a conveying mechanism for receiving and conveying the steel pallet dropped from the transport vehicle platform.

8. The steel pallet destacking method according to any one of claims 1 to 7, characterized in that: The steps include: S1, the conveyor line stops when it moves a steel pallet to a position blocked by a blocker; S2, two lifting devices make the plug-in plates of the two plug-in and extraction components at the lowest position; S3, two horizontal push devices drive two insertion and extraction components to move toward the steel pallet on the conveyor line; S4, when it is determined that the inserting plates of the two inserting and removing assemblies have moved to the bottom of the top frame of the steel pallet on the conveyor line and the limit blocks on the inserting plates maintain a gap with both sides of the steel pallet, the jacking device drives the lifting platform to lift so that the inserting plates lift the steel pallet and separate it from the conveyor line. At the same time, the horizontal pushing device drives the two inserting plates to continue moving in the direction of the steel pallet until the limit blocks are in contact with both sides of the steel pallet; S5, the conveyor line moves the next steel pallet to a position blocked by the blocker and then stops; S6, the lifting device drives the two insertion and removal assemblies to descend so that the steel pallets on the insertion and removal assemblies fall onto the steel pallets on the conveyor line; S7, the horizontal pushing device drives the two insertion and extraction components to retract; S8, repeat S2-S7 until a predetermined number of the steel pallets are stacked together.

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