An automatic depalletizing device and method for flexible packaging materials

Abstract

This invention discloses an automatic depalletizing device and method for flexible packaging materials. The device includes a main body, a moving mechanism, a differential drive mechanism, and a differential guide mechanism. The differential guide mechanism consists of at least two coaxially connected differential rollers that can rotate at different speeds. The gear set of the differential drive mechanism controls the rotational speed of each differential roller to increase sequentially, thereby applying different tangential driving speeds to the material packages in the same row on the top layer of the stack, achieving orderly and sequential falling of the material packages. The differential rollers are fitted with rollers with raised ridges to enhance gripping force and prevent slippage; the rollers are composed of two half-cylinders joined together, facilitating position adjustment to accommodate different material package sizes. The moving mechanism drives the differential guide mechanism to move laterally via a lead screw and can integrate a high-frequency vibrator to reduce interlayer friction and promote material flow. It also includes loading and unloading mechanisms to achieve automated feeding and empty pallet recycling. This invention solves the problems of disorderly material slippage and difficulty in depalletizing powder materials in the prior art, achieving efficient, orderly, and reliable automatic depalletizing.

Description

Technical Field

[0001] This invention relates to logistics-related equipment, and more particularly to an automatic depalletizing device and method for flexible packaging materials. Background Technology

[0002] Flexible packaging is a common method of logistics preservation in production and daily life. Raw materials are sealed in packaging bags to facilitate subsequent transportation and storage. However, compared with boxed or cartoned materials, flexible packaging materials also present some challenges in the transit process that urgently need to be addressed.

[0003] To improve the efficiency of handling flexible packaging materials in a warehouse, they are typically stacked on pallets and then transferred and stored using forklifts. However, during subsequent handling (transferring the flexible packaging materials to the truck bed), to maximize the utilization of the truck bed space, it is usually necessary to remove the flexible packaging materials from the pallets and then stack them into the truck bed, which requires destacking.

[0004] Patent No. CN201822145458.2 discloses a pallet destacking device, which automatically destacking soft-packaged materials on pallets by tilting the material feeding mechanism. However, it should be noted that existing equipment still has some problems in its use. For example, when destacking soft-packaged materials with larger particles, such as rice, pelleted feed, and compound fertilizer, the material can usually overcome the friction between itself and the soft-packaged material below because the surface of the packaging bag is relatively smooth. However, when destacking materials such as flour and cement, the high density of the material itself and the negative pressure attraction between the contact surfaces of adjacent materials result in greater static friction, making it difficult for the material to overcome the friction and slide off on its own.

[0005] To solve the above problems, the tilt angle of the depalletizer is usually increased to allow the materials to slide down automatically. However, this method of increasing the tilt angle also brings some derivative problems. One of the more prominent issues is that, although the front baffle plate enables the soft-packaged materials on the pallet to fall in layers during depalletizing, the upper layer of materials, due to the lack of effective restraint and planning, often results in the entire layer of materials sliding down at the same time. Multiple packages fall haphazardly and accumulate disorderly on the conveyor belt below, which not only affects the normal material retrieval of the subsequent stacking mechanism but may even cause conveyor belt blockage.

[0006] To address these issues, the current approach involves installing a sorting line on the rear conveyor belt. This line disperses, organizes, and guides the disorderly piled materials on the conveyor belt, facilitating their pickup by the subsequent automated palletizer. However, such lines typically require long conveyor belts and numerous auxiliary devices, resulting in significant space requirements and relatively high costs.

[0007] Therefore, a destacking device for soft packaging materials is designed to achieve orderly drop of soft packaging materials. This device can not only effectively solve the existing problems in the destacking of soft packaging materials, but also eliminate the need for subsequent sorting lines, save production space, and achieve the goal of reducing costs and increasing efficiency. Summary of the Invention

[0008] The purpose of this invention is to provide an automatic depalletizing device and method for soft-packaged materials, so as to realize the automatic depalletizing of soft-packaged materials on pallets, especially the orderly depalletizing of soft-packaged materials containing powder.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A depalletizing device for flexible packaging materials, comprising

[0011] The main body is used to place the stack and guide the stack to tilt in the direction of dismantling during dismantling;

[0012] The moving mechanism is located at the top of the main body to enable reciprocating motion along the feeding direction of the soft package material;

[0013] The differential drive mechanism is mounted on the moving mechanism;

[0014] A differential guide mechanism is rotatably mounted on the moving mechanism. The differential guide mechanism includes at least two differential rollers, which are coaxially connected in series. One end of each differential roller extends axially to be driven and connected to the differential drive mechanism to achieve differential rotation under the drive of the differential drive mechanism.

[0015] Preferably, a roller is coaxially mounted on the outside of the differential roller, and the roller has several protruding ridges evenly distributed on it.

[0016] Preferably, the roller is formed by joining two axially split half-cylinders.

[0017] Preferably, the differential drive mechanism includes a motor mounted on the moving mechanism, with multiple drive gears coaxially mounted on the output shaft of the motor; it also includes multiple driven gears, each driven gear being coaxially connected to one end of a corresponding differential roller, and the drive gears meshing with the corresponding driven gears to form gear sets, with multiple gear sets arranged axially and the transmission ratio increasing along the arrangement direction.

[0018] Preferably, the moving mechanism includes lead screws disposed on both sides of the upper part of the main body, a lead screw motor is disposed on the lead screw, the lead screw motor is connected to the moving bracket, and the differential guide mechanism is rotatably mounted on the moving bracket.

[0019] Preferably, the lead screw motor is connected to the high-frequency vibrator, and the movable bracket is connected to the high-frequency vibrator.

[0020] Preferably, it also includes a loading and unloading mechanism, which is disposed on the feeding side of the main body, including...

[0021] The feeding conveyor belt is used to store the stacks to be destacking and push the stacks into the main body;

[0022] The unloading conveyor belt is located below the loading conveyor belt to receive pallets that have been destacking and returned from the main body.

[0023] The present invention also discloses a destacking method for a destacking device using the above-mentioned flexible packaged materials, comprising the following steps:

[0024] S1 Loading: The forklift picks up the stack of soft packaged materials and puts them onto the loading conveyor belt. Then the loading conveyor belt moves and feeds the stack into the main body.

[0025] S2 Flipping Preparation: The flipping device on the main body is activated to tilt the main body and the stack placed in the main body at a certain angle.

[0026] S3 Destacking 1: The motor in the differential drive mechanism rotates, which in turn drives the drive gear on its output shaft to rotate synchronously. As the drive gear rotates, the driven gear meshing with it also rotates, eventually driving multiple differential rollers coaxially connected to the driven gear to rotate at different speeds. During the rotation of the differential rollers, the moving mechanism moves synchronously and drives the differential guide mechanism to move slowly. Then the rotating differential rollers fully contact the material packages on the upper layer of the stack. The differential rollers then drive the material packages to fall sequentially onto the conveyor belt below, and the outer row of the material packages on the top layer of the stack is then destacking completed.

[0027] S4 Destacking 2: After the outer row of stacks is destacking, the moving mechanism, along with the differential guide mechanism that rotates at a differential speed, continues to move inward until it comes into contact with the material bag of the inner row. At this time, the material bag will be subjected to the same action as in step S3 and slide outward until it falls onto the conveyor belt below. The inner row of the top layer of the stack is now destacking.

[0028] S5 Destacking 3: After one layer of material packages on the stack is destacking, the moving mechanism resets, and then the lifting mechanism in the main body rises to lift the stack upwards, so that the upper stack contacts the differential guide mechanism. Then, steps S3 and S4 are repeated until all material packages are destacking.

[0029] S6 Reset and return the pallet: After all the material packages are unpacked, the main body flips and resets, the lifting mechanism descends until it is in contact with the unloading conveyor belt, and then the conveyor plate in the main body returns the pallet to the unloading conveyor belt. Then the lifting mechanism in the main body resets, and the stack stored on the loading conveyor belt is sent into the main body. Repeat steps S1 to S5 to dismantle a new stack.

[0030] Preferably, in steps S3 and S4, the high-frequency vibrator is also started synchronously to drive the differential guide mechanism to vibrate at high frequency on the surface of the material package.

[0031] Preferably, in step S4, after the moving mechanism moves to a distance of half the length of the rear material, it moves back a distance of at least one material bag length to ensure that the material bag does not remain on the stack.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. Orderly Depalletizing Control: This invention utilizes the differential rotation of multiple differential rollers in a differential guide mechanism to apply different tangential driving speeds to the same row of material packages. The material packages corresponding to the faster-rotating differential rollers fall at a faster speed, while those corresponding to slower-rotating rollers fall more slowly. This ensures that the material packages fall sequentially in a predetermined order, effectively avoiding the accumulation and blockage problems caused by multiple packages falling simultaneously, and providing an orderly material flow for subsequent processes. By solving this problem at the source of material depalletizing, the disorderly falling of materials is resolved, eliminating the need for a subsequent sorting line and achieving cost reduction and efficiency improvement.

[0034] 2. Anti-slip and improved stability: To address the issue of poor contact between flexible packaging materials and smooth roller surfaces due to easy deformation, a roller with raised ridges is installed outside the differential roller. The raised ridges can embed into the surface of the flexible packaging materials, transforming simple surface sliding friction into positive tangential thrust, significantly enhancing the differential roller's ability to grip and drive the material packages, ensuring the stability and reliability of the depalletizing process.

[0035] 3. High adaptability and convenient maintenance: The roller adopts a design composed of two half-cylinders, making its installation, disassembly, and position adjustment on the differential roller extremely convenient. This allows the device to quickly adapt to soft package materials of different specifications (length, width) and the resulting changes in the number of packages per row. By adjusting the number and position of the rollers, precise and efficient destacking can be achieved, greatly improving the versatility and flexibility of the equipment.

[0036] 4. Reliable drive and good environmental tolerance: The differential drive mechanism uses multiple sets of gears (driving gear and driven gear) with increasing transmission ratios to achieve differential speed. This structure is simple, efficient, low-cost, and provides precise transmission. In harsh environments with dust generated during the depalletizing of soft-pack powder materials, the relatively well-sealed gear drive is more reliable and durable than other transmission methods (such as belt drive).

[0037] 5. Reduced Friction and Improved Flow: The added high-frequency vibrator transmits high-frequency vibrations to the differential guide mechanism and the soft-pack material in contact with it. This vibration effectively breaks down the static friction between the upper and lower material packages, making it easier for them to start sliding (static friction is converted into dynamic friction); on the other hand, it makes the powdered material more evenly distributed inside the bag, avoiding the risk of bulging at the tail of the packaging bag during differential roller crushing, thus improving the smoothness of depalletizing and the integrity of the material.

[0038] 6. Automation and high efficiency: The loading and unloading mechanism (including loading and unloading conveyor belts) enables automatic supply of pallets to be destabilized and automatic removal of empty pallets, making the entire destabilization process closely connected, significantly reducing manual intervention, and improving overall operational efficiency and automation level. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the present invention;

[0040] Figure 2 This is a schematic diagram showing the state of the stack during the flipping and unstacking process;

[0041] Figure 3 for Figure 1 A sectional view;

[0042] Figure 4 This is a schematic diagram of the structure of the main body in this scheme;

[0043] Figure 5 This is a structural schematic diagram of the differential drive mechanism and the differential guide mechanism;

[0044] Figure 6 This is a schematic diagram of the differential guide mechanism after adjustment based on the amount of soft packaging material.

[0045] Figure 7 for Figure 5 Exploded view;

[0046] Figure 8 This is a schematic diagram of the roller structure.

[0047] Reference numerals: 1. Body; 11. Main frame; 12. Tilting mechanism; 13. Lifting mechanism; 14. Conveyor plate; 2. Moving mechanism; 21. Lead screw; 22. Lead screw motor; 23. Moving support; 24. High-frequency vibrator; 3. Differential drive mechanism; 31. Motor; 32. Driving gear; 33. Driven gear; 4. Differential guide mechanism; 41. Differential roller; 42. Roller; 421. Protruding rib; 422. Half-cylinder; 5. Loading and unloading mechanism; 51. Loading conveyor belt; 52. Unloading conveyor belt. Detailed Implementation

[0048] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the 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.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] like Figures 1-8 The device shown is a depalletizing device for flexible packaging materials, comprising a main body 1. The depalletizing principle of the main body 1 in this design is similar to existing depalletizing equipment, including a main frame 11, a tilting mechanism 12 installed at the bottom of the main frame 11, a lifting mechanism 13 installed within the main frame 11, and a conveyor plate 14 installed on the lifting mechanism 13. After the stack is fed into the main body 1 by a forklift or loading / unloading mechanism 5, its position is adjusted by the conveyor plate 14, and then the telescopic rod in the tilting mechanism 12 is extended, causing the entire main frame 11 to tilt. At this time, the stack in the main body 1 also tilts accordingly. The material on the top layer of the stack overcomes the friction with the material below due to gravity and slides down onto the conveyor belt below, thus achieving the depalletizing operation. However, it should be noted that the falling sequence of the flexible packaging materials is uncontrollable when depalletizing using the above structure. This may result in multiple packages falling simultaneously and accumulating on the conveyor belt, not only causing problems for subsequent palletizing equipment but also potentially blocking the downstream conveyor channel.

[0052] Based on the above problems, this solution proposes a device that enables the orderly falling of soft packaged materials during destacking, thereby solving the existing problems.

[0053] A set of moving mechanisms 2 is provided at the upper end of the main body 1. A set of differential drive mechanisms 3 and a set of differential guide mechanisms 4 are installed on the moving mechanisms 2.

[0054] like Figures 5-7 As shown, the differential guide mechanism 4 in this scheme includes three differential rollers 41. These three differential rollers 41 are connected in series by a hollow shaft, so that while maintaining coaxiality, they can also rotate independently when driven by an external force.

[0055] like Figure 5 As shown, after the differential guide mechanism 4 and the differential drive mechanism 3 are connected to each other, the differential rollers 41 can rotate independently and at different speeds through the drive of the differential drive mechanism 3.

[0056] like Figures 5-7 As shown, the differential drive mechanism 3 in this scheme includes a motor 31 mounted on the moving mechanism 2. Three drive gears 32 are coaxially mounted on the output shaft of the motor 31. It also includes three driven gears 33, which are respectively connected to the end faces of three differential rollers 41 and mesh with their corresponding drive gears 32, forming three gear sets. When the motor 31 rotates, its output shaft drives the drive gears 32 to rotate. The drive gears 32 then drive the meshing driven gears 33 to rotate, and the driven gears 33 in turn drive the connected differential rollers 41 to rotate. It should be noted that this scheme adjusts the output speed of the driven gears 33 by adjusting the transmission ratio of the three gear sets. Specifically, the number of teeth on the three drive gears 32 gradually increases from the side closest to the motor 31 to the side furthest from the motor 31. Conversely, the number of teeth on the three driven gears 33 gradually decreases from the side closer to the motor 31 to the side farther away from the motor 31. When the driving gear 32 in the three gear sets meshes with the driven gear 33, the resulting transmission ratio will also gradually increase from the side closer to the motor 31 to the side farther away from the motor 31. At this time, although the output speed of the motor 31 is a constant value, after the gear set conversion, the speed reflected by the three differential rollers 41 will also gradually increase from the differential roller 41 on the side closer to the motor 31 to the differential roller 41 on the side farther away from the motor 31. That is, the speeds of the three differential rollers 41 are different.

[0057] It should be noted that the purpose of differentiating the rotational speeds of the three differential rollers 41 is to provide different tangential driving speeds. Specifically, when the rotating differential roller 41 contacts the material surface, friction is generated between them. This friction extends along the tangential direction of the differential roller 41 (the direction of material descent during destacking). This tangential friction, combined with the gravitational component of the material after tilting, helps to assist the material in falling. In this scheme, the rotation of the differential roller 41 enables the upper layer of material to overcome the static friction with the lower layer, driving the material to move. Simultaneously, because the material passes through the differential roller 41 as it slides down, the differential roller 41 also controls the falling speed of the material. That is, material in the fast-rotating position will fall faster due to the faster tangential driving speed applied by the differential roller, while material in the slow-rotating position will fall slower due to the slower tangential driving speed. Through the above methods, this scheme ultimately achieves the goal of controlling the falling sequence of the flexible material bags.

[0058] Although this solution controls the falling sequence of materials during destacking by using the differential rotation of multiple differential rollers 41, it still has some flaws. Specifically, the material to be destacking in this solution is soft-packaged material. When the rigid and regular cylindrical structure of the differential roller 41 comes into contact with the material, the material in the bag (especially powdery material) is prone to adaptive deformation. At this time, the differential roller 41 is prone to slippage, affecting the destacking effect.

[0059] To overcome the above problems, this solution proposes the following approach. Specifically, a roller 42 is fitted onto the surface of the differential roller 41, and the roller 42 is fixed to the differential roller 41 by bolts. Several protruding ridges 421 are evenly distributed on the roller 42. When the differential roller 41 rotates, the protruding ridges 421 embed into the soft-pack material, achieving a more stable connection. In addition to the tangential friction generated by the contact of the cylindrical surfaces providing the force to pull the soft-pack material downwards, the tangential thrust exerted by the protruding ridges 421 as they rotate after embedding into the soft-pack material becomes a more stable force driving the soft-pack material downwards.

[0060] Furthermore, it should be noted that during the actual dismantling of the stack, the dimensions (length, width) of the flexible packaging materials are not fixed. Changes in the size of the packaging bags will alter the quantity of materials in each row of the stack. To better accommodate these changes in packaging bag dimensions and the resulting variations in material arrangement, this solution allows for multiple differential rollers 41, such as 4, 5, 6, etc. In some embodiments (e.g.... Figure 6As shown, if there are two bags of material in a row on the stack, the middle roller 42 can be removed according to the arrangement of the two bags (to avoid rotating both bags simultaneously). The number of rollers 42 is reduced from three to two, and the positions of the two rollers 42 are adjusted to the sides for better material destacking control. In some other embodiments, if there are four bags of material in a row on the stack, one roller 42 can be added, and the position of the roller 42 can be adjusted so that the roller 42 is fixedly engaged with the differential roller 41 corresponding to the material. Furthermore, this solution only requires flexible adjustment of the number of rollers 42 and can also adapt to destacking operations with other arrangements of material quantities.

[0061] This solution achieves multiple adaptations to destacking specifications through the aforementioned method. To address the need for flexible adjustment of the roller 42, the roller 42 in this solution is composed of two half-cylinders 422 joined together by bolts (not shown in the figure). Disassembly, replacement, or position adjustment is only required by loosening the bolts.

[0062] like Figure 5 , Figure 6 As shown, the moving mechanism 2 is mounted on two lead screws 21 on both sides of the upper part of the main body 1. Each lead screw 21 is equipped with a lead screw motor 22, which rotates in both directions to achieve axial movement on the lead screw 21. Simultaneously, a set of moving brackets 23 is connected to the lead screw motors 22, and each moving bracket 23 has a mounting hole. In the differential guide mechanism 4, two differential rollers 41 located at both ends are rotatably mounted in these mounting holes.

[0063] like Figure 5 , Figure 6 As shown, in some embodiments, the lead screw motor 22 and the moving bracket 23 are connected via a high-frequency vibrator 24. When the high-frequency vibrator 24 operates, the high-frequency vibration it generates is transmitted to the differential guide mechanism 4 through the moving bracket 23. The differential guide mechanism 4, while pulling the soft package material, can also apply a high-frequency vibration to the soft package material. It should be noted that the soft package material, especially powder, will exhibit certain fluid characteristics after being subjected to high-frequency vibration. This high-frequency vibration can make the material distribution in the packaging bag more uniform, avoiding the situation where the differential roller 41 rotates and rolls over the material, pushing the material to the back of the packaging bag and forming a bulge, thereby effectively reducing the risk of the packaging bag bursting open at the rear.

[0064] It should also be noted that after being subjected to high-frequency vibration, the soft packaging material itself also undergoes slight vibration. This vibration can effectively break down the static friction between the upper and lower layers of material, making the rotating differential roller 41 drive the soft packaging material more smoothly.

[0065] like Figures 1-3As shown, this solution also discloses a loading and unloading mechanism 5. This loading and unloading mechanism 5 includes a loading conveyor belt 51 and a unloading conveyor belt 52. The loading conveyor belt 51 is flush with the initial conveyor tray 14 to quickly feed the stacks stored thereon into the main body 1. The unloading conveyor belt 52 is flush with the descending conveyor tray 14 driven by the lifting mechanism 13 to accept the remaining pallets after destacking.

[0066] In addition, this solution also discloses a destacking method for a destacking device using the above-mentioned soft-pack materials, the specific steps of which include:

[0067] S1 Loading: The forklift picks up the soft package material stack and puts it onto the loading conveyor belt 51. Then the loading conveyor belt 51 moves and sends the stack into the body 1.

[0068] S2 Flipping Preparation: The flipping device on the main body 1 is activated to tilt the main body 1 and the stack placed in the main body 1 at a certain angle.

[0069] S3 Destacking 1: The motor 31 in the differential drive mechanism 3 rotates, which in turn drives the drive gear 32 on its output shaft to rotate synchronously. As the drive gear 32 rotates, the driven gear 33 meshing with it also rotates, eventually driving multiple differential rollers 41 coaxially connected to the driven gear 33 to rotate at different speeds. During the rotation of the differential rollers 41, the moving mechanism 2 moves synchronously and drives the differential guide mechanism 4 to move slowly. Then the rotating differential rollers 41 fully contact the material bags on the upper layer of the stack. The differential rollers 41 then drive the material bags to fall sequentially onto the conveyor belt below, and the outer row of the material bags on the top layer of the stack is then destacking completed.

[0070] S4 Destacking 2: After the outer row of stacks is destacking, the moving mechanism 2, along with the differential guide mechanism 4 which rotates at a differential speed, continues to move inward until it comes into contact with the material bag of the inner row. At this time, the material bag will be subjected to the same action as in step S3 and slide outward until it falls onto the conveyor belt below. The inner row of the top layer of the stack is now destacking.

[0071] S5 Destacking 3: After one layer of material packages on the stack is destacking, the moving mechanism 2 resets, and then the lifting mechanism 13 in the main body 1 rises to lift the stack upwards, so that the upper stack can contact the differential guide mechanism 4. Then, steps S3 and S4 are repeated until all material packages are destacking.

[0072] S6 Reset and return the pallet: After all the material packages are unpacked, the main body 1 flips and resets, the lifting mechanism 13 descends until it is in contact with the unloading conveyor belt 52, then the conveyor plate 14 in the main body 1 returns the pallet to the unloading conveyor belt 52, and then the lifting mechanism 13 in the main body 1 resets, and the stack stored on the loading conveyor belt 51 is sent into the main body 1. Repeat steps S1~S5 to dismantle a new stack.

[0073] In some implementations, in steps S3 and S4, the high-frequency vibrator 24 is also started synchronously to drive the differential guide mechanism 4 to vibrate at high frequency on the surface of the material package.

[0074] In some implementations, in step S4, after moving to half the length of the rear material, the moving mechanism 2 moves back a distance of at least one material bag length to ensure that the material bag does not remain on the stack.

[0075] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soft pack material de-stacking apparatus characterized by: The body (1) is used for placing the stack and can guide the stack to tilt towards the disassembling direction when disassembling; The moving mechanism (2) is arranged on the upper end of the body (1) and can realize reciprocating movement along the soft package material discharging direction; The differential drive mechanism (3) is arranged on the moving mechanism (2); The differential guide mechanism (4) is rotatably arranged on the moving mechanism (2), and the differential guide mechanism (4) comprises at least two differential rollers (41), the at least two differential rollers (41) are coaxially connected in series, and one end of the at least two differential rollers (41) extends axially to be drivingly connected with the differential drive mechanism (3) to realize differential rotation under the driving of the differential drive mechanism (3); The differential roller (41) is coaxially provided with a roller cylinder (42) outside, and the roller cylinder (42) is uniformly provided with a plurality of convex ribs (421); The differential drive mechanism (3) comprises a motor (31) arranged on the moving mechanism (2), a plurality of driving gears (32) are coaxially arranged on the output shaft of the motor (31); a plurality of driven gears (33) are coaxially connected to one end of the corresponding differential roller (41), the driving gears (32) are engaged with the corresponding driven gears (33) to form gear sets, and a plurality of gear sets are arranged along the axial direction and the transmission ratios increase along the arrangement direction; The moving mechanism (2) comprises lead screws (21) arranged on both sides of the upper part of the body (1), the lead screws (21) are provided with lead screw motors (22), the lead screw motors (22) are connected with moving supports (23), and the differential guide mechanism (4) is rotatably arranged on the moving supports (23); The lead screw motor (22) is connected with a high-frequency vibrator (24), and the moving support (23) is connected with the high-frequency vibrator (24); The feeding and discharging mechanism (5) is arranged on the feeding side of the body (1) and comprises The feeding conveyor belt (51) is used for storing the stack to be disassembled and pushing the stack into the body (1); The discharging conveyor belt (52) is arranged below the feeding conveyor belt (51) to receive the tray returned from the body (1) after disassembling. The roller cylinder (42) is composed of two axially split half cylinders (422).

2. A soft pack material unstacking device as claimed in claim 1, characterized in that:

3. A disassembling method of the soft package material disassembling device according to any one of claims 1-2, comprising the following steps: S1 feeding: the forklift forks the soft package material stack to the feeding conveyor belt (51), and then the feeding conveyor belt (51) acts and feeds the stack into the body (1); S2 overturning preparation: the overturning device on the body (1) acts to make the body (1) and the stack placed in the body (1) tilt at a certain angle; ​ S3: the motor (31) in the differential drive mechanism (3) rotates, and then drives the driving gear (32) on the output shaft to rotate synchronously. With the rotation of the driving gear (32), the driven gear (33) engaged with the driving gear (32) also rotates synchronously. Finally, the multiple differential rollers (41) coaxially connected with the driven gear (33) are driven to rotate at different speeds. In the process of rotating the differential rollers (41), the moving mechanism (2) moves synchronously and drives the differential guide mechanism (4) to move slowly. The rotating differential rollers (41) are in full contact with the material packages on the upper layer of the stack, and the differential rollers (41) rotate at different speeds, which in turn drive the material packages to fall sequentially onto the conveyor belt below. The outer row of material packages on the upper layer of the stack is then completed. S4: After the outer row of material packages is completed, the moving mechanism (2) continues to move inward with the differential guide mechanism (4) rotating at different speeds until it contacts the inner row of material packages. At this time, the material packages will be subjected to the same action as in step S3 and will slide outward until they fall onto the conveyor belt below. The inner row of material packages on the upper layer of the stack is then completed. S5: After the material packages on the stack are completed, the moving mechanism (2) is reset, and then the lifting mechanism in the body (1) is raised to lift the stack upward, so that the upper stack contacts the differential guide mechanism (4). Then, steps S3 and S4 are repeated until all the material packages are disassembled. S6: After all the material packages are disassembled, the body (1) is reset and the lifting mechanism is lowered until it is in contact with the lower conveying belt (52). Then the conveying disc in the body (1) retreats the tray to the lower conveying belt (52), and then the lifting mechanism in the body (1) is reset. The stack stored on the upper conveying belt (51) is sent into the body (1), and steps S1-S5 are repeated to disassemble the new stack.

4. The de-palletizing method of claim 3, wherein: In steps S3 and S4, the high-frequency vibrator (24) is also started synchronously to drive the differential guide mechanism (4) to vibrate at high frequency on the surface of the material package.

5. The de-palletizing method of claim 3, wherein: In step S4, the moving mechanism (2) moves to a distance of half the length of the rear row of material packages and then runs back at least one length of the material package to ensure that the material package does not remain on the stack.

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