Multi-station bag feeding device and multi-station bag feeding method

Abstract

The present invention provides a multi-station bag feeding device and a multi-station bag feeding method. An upper station and a lower station are arranged below a bag storage and bag separation device. A bag opening station is provided at each station, and a bag lowering positioning device and a bag opening device are provided at the bag opening station. A reciprocating bag feeding device is provided at each station. A movable door is provided at the bottom of the bag lowering positioning device of the upper station. The bag lowering positioning device of the lower station is arranged below the bag lowering positioning device of the upper station and is aligned with the bag lowering positioning device of the upper station, so that when the movable door is opened, the bags discharged from the bag storage and bag separation device fall into the bag lowering positioning device of the lower station through the bag lowering positioning device of the upper station. The present invention can feed bags by gravity and realize multi-station continuous bag retrieval and feeding with alternating vertical and horizontal conveying structures through translational reciprocating conveying, and deliver the bags to corresponding filling and sealing stations. The device occupies a small area and has high efficiency.

Description

Technical Field

[0001] The invention relates to a multi-station bag feeding device and a multi-station bag feeding method. Background Art

[0002] Circular conveying is a common method for conveying bags in packaging machinery, as it occupies less workshop space and reduces requirements. While linear conveying can convey bags in rows or multiple rows at a time, it occupies a larger area and requires a longer conveyor travel. Using a circular motion in the vertical direction also complicates the conveyor structure. Summary of the Invention

[0003] The object of the present invention is to provide a multi-station bag feeding device and a multi-station bag feeding method, so as to reduce the site occupation, reduce the complexity of the conveying mechanism, and increase the efficiency.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The multi-station bag feeding device includes a bag storage and bag separation device; the characteristics are:

[0006] The bag storage and bag separation device is arranged at the top, and the upper and lower workstations are arranged below the bag storage and bag separation device; each workstation is provided with a bag opening station, and the bag opening station is provided with a bag lowering positioning device and a bag opening device;

[0007] Each workstation is equipped with a reciprocating bag feeding device; the reciprocating bag feeding device is equipped with a bag clamping mechanism to complete the bag transmission at each workstation;

[0008] A movable door is provided at the bottom of the lower bag positioning device of the upper workstation, and the lower bag positioning device of the lower workstation is provided below the lower bag positioning device of the upper workstation and aligned with the lower bag positioning device of the upper workstation, so that when the movable door is opened, the bags output from the bag storage and bag dividing device fall into the lower bag positioning device of the lower workstation through the lower bag positioning device of the upper workstation.

[0009] On the basis of adopting the above technical solutions, the present invention may also adopt the following further technical solutions, or use these further technical solutions in combination:

[0010] The bag storing and separating device is provided with a plurality of parallel bag storing bins and corresponding bag separating mechanisms, and the bag storing bins are respectively provided with outlets; the bag lowering positioning device and the bag opening device are respectively provided with positioning structures and bag opening working parts corresponding to the number of bag storing bins, and the reciprocating conveying device is provided with a bag clamping mechanism matching the number of bag storing bins.

[0011] In the upper workstations, the bag opening station of the upper workstation is centrally arranged, and filling and sealing stations are arranged on both sides of the bag opening station of the upper workstation; the reciprocating bag feeding device of the upper workstation is provided with a first set of bag clamping mechanisms and a second set of bag clamping mechanisms; the first set of bag clamping mechanisms moves back and forth between the bag opening station of the upper workstation and the first side filling and sealing station of the filling and sealing stations on both sides, and the second set of bag clamping mechanisms moves back and forth between the bag opening station of the upper workstation and the second side filling and sealing station of the filling and sealing stations on both sides; or / and, in the lower workstations, the bag opening station of the lower workstation is centrally located, and filling and sealing stations are located on both sides of the bag opening station of the lower workstation; the reciprocating bag feeding device of the lower workstation is provided with a first set of bag clamping mechanisms and a second set of bag clamping mechanisms; the first set of bag clamping mechanisms moves back and forth between the bag opening station of the lower workstation and the first side filling and sealing station of the two side filling and sealing stations, and the second set of bag clamping mechanisms moves back and forth between the bag opening station of the lower workstation and the second side filling and sealing station of the two side filling and sealing stations. Furthermore, the first set of bag clamping mechanisms and the second set of bag clamping mechanisms are driven and operated by different reciprocating conveying mechanisms; or / and, in the lower workstations, the first set of bag clamping mechanisms and the second set of bag clamping mechanisms are driven and operated by different reciprocating conveying mechanisms.

[0012] The positioning structure of the bag positioning device of the upper workstation and the positioning structure of the bag positioning device of the lower workstation both adopt bag rails located on both sides for receiving the bags that fall after bagging. The movable door corresponds to the bottom of the positioning structure of the bag positioning device of the upper workstation; the bag positioning device of the lower workstation is also provided with a lifting mechanism; the positioning structure is connected to the lifting connection mechanism and can rise to the bag opening station of the lower workstation, and descend to release the restriction on the bags.

[0013] The bag opening device is provided with a suction cup lifting connection mechanism, and the bag opening device is provided with a front suction cup and a rear suction cup, and the front suction cup and the rear suction cup are connected to the suction cup forward and backward movement mechanism, so that the front suction cup and the rear suction cup can move away from each other to open the bag and approach each other to stick to the bag wall, and the suction cup forward and backward movement mechanism is connected to the suction cup lifting connection mechanism, and can descend to the bag opening height and rise to leave the bag that has been opened and is clamped by the bag clamping mechanism on the reciprocating bag feeding device.

[0014] A bag lowering device is also provided below the bag storing and separating device, which guides the falling bags into the bag lowering positioning device of the bag opening station at the upper workstation. The bag falling trajectory specified by the bag lowering device passes through the gap between the front suction cup and the rear suction cup of the bag opening device.

[0015] To achieve the above object, according to the second aspect of the present invention, the present invention adopts the following technical solutions:

[0016] A multi-station bag feeding method, characterized by comprising:

[0017] A bag storage and sorting station is set up on the top to store bag stacks and sort out individual bags;

[0018] The bag feeding method is divided into two layers of workstations for bag feeding. The individual bags separated from the bag storage and bag separation workstation use the bag's own gravity to fall into the upper and lower workstations in sequence, so that the bags arrive at the workstations on the corresponding layer.

[0019] At the upper and lower workstations, bags are respectively delivered by the upper reciprocating bag delivery device and the lower reciprocating bag delivery device, and the bags are opened before the reciprocating bag delivery device delivers the bags.

[0020] Furthermore, in the upper workstations, the bag opening workstation of the upper workstation is centrally arranged, and filling and sealing workstations are arranged on both sides of the bag opening workstation of the upper workstation; the reciprocating bag feeding device of the upper workstation is provided with a first group of bag clamping mechanisms and a second group of bag clamping mechanisms; the first group of bag clamping mechanisms moves back and forth between the bag opening workstation of the upper workstation and the first side filling and sealing workstation of the filling and sealing workstations on both sides to feed and take out bags, and the second group of bag clamping mechanisms moves back and forth between the bag opening workstation of the upper workstation and the second side filling and sealing workstation of the filling and sealing workstations on both sides to feed and take out bags; Alternatively / and, in the lower workstation, the bag opening station of the lower workstation is centrally arranged, and filling and sealing stations are arranged on both sides of the bag opening station of the lower workstation; the reciprocating bag feeding device of the lower workstation is provided with a first group of bag clamping mechanisms and a second group of bag clamping mechanisms; the first group of bag clamping mechanisms moves back and forth between the bag opening station of the lower workstation and the first side filling and sealing station of the filling and sealing stations on both sides to feed and take bags, and the second group of bag clamping mechanisms moves back and forth between the bag opening station of the lower workstation and the second side filling and sealing station of the filling and sealing stations on both sides to feed and take bags.

[0021] Due to the adoption of the technical solution of the present invention, the present invention can deliver bags by gravity and realize multi-station continuous bag taking and delivery with alternating vertical and horizontal conveying phase structures through translational reciprocating conveying, and deliver the bags to the corresponding filling and sealing stations, with a small site occupation area and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a side view of an embodiment of a multi-station bag feeding device of the present invention.

[0023] Figure 2 This is a schematic diagram of an embodiment of a multi-station bag feeding device of the present invention observed from one angle.

[0024] Figure 3 This is a schematic diagram of an embodiment of the multi-station bag feeding device of the present invention observed from another angle.

[0025] Figure 4 for Figure 1-3 Schematic diagram of the bag storage and bag separation mechanism in the illustrated embodiment.

[0026] Figure 5 for Figure 1-3 Schematic diagram of the bag opening mechanism at the upper bag opening station in the illustrated embodiment.

[0027] Figure 6 for Figure 1-3 Schematic diagram of the upper layer lower bag positioning device and the lower layer positioning device in the illustrated embodiment.

[0028] Figure 7 It is a schematic diagram of the lower bag opening station bag opening mechanism in the embodiment shown in 1-3 and the combined upper bag positioning device movable door.

[0029] Figure 8 for Figure 1-3 Schematic diagram of the reciprocating conveyor device in the illustrated embodiment.

[0030] Figure 9 This is a bag delivery flow chart provided by the present invention. DETAILED DESCRIPTION

[0031] Referring to the accompanying drawings, the multi-station bag feeding device provided by the present invention includes a bag storage and bag separation device, wherein the bag storage and bag separation device 200 is arranged at the bag storage and bag separation station S1 above the frame 100; the bag storage and bag separation device is arranged above, and the upper and lower stations are arranged below the bag storage and bag separation device; each station is provided with a bag opening station S2, and the bag opening station S2 is provided with a lower bag positioning device and a bag opening device.

[0032] For each workstation, a reciprocating bag feeding device 700 is provided. The reciprocating bag feeding devices on the upper and lower levels are both provided with bag clamping mechanisms to complete the bag transmission at the workstations on the corresponding levels.

[0033] The bag storage and bag separating device 200 is provided with multiple parallel bag storage bins 201 and corresponding bag separating mechanisms. Bags are stacked and arranged in the bag storage bin 201 and an outlet 202 is arranged. The bag storage bin 201 is tilted so that the bags can be fed to the bag storage bin outlet 202 one by one by gravity. A suction cup 203 is provided outside the outlet of the bag storage bin, and each bag storage bin outlet 202 is respectively provided with a group of suction cups 203. The suction cups 203 are installed on a mounting plate 204, and the mounting plate 204 is connected to a driving mechanism 205 (such as a cylinder), and moves back and forth facing the bag storage bin outlet 202. The suction cups 203 suck the bag when moving forward to the bag storage bin outlet 202, and then retreat a set distance, release the bag, and the bag falls by gravity.

[0034] The lower bag positioning device and bag opening device at the bag opening station S2 of the upper and lower workstations are respectively provided with positioning structures and bag opening working components corresponding to the number of bag storage bins, and the reciprocating bag feeding devices of the upper and lower workstations are provided with bag clamping mechanisms matching the number of bag storage bins.

[0035] A bag unloading device is also located below the bag storage and dispensing device. This device utilizes a bag conveyor track 206, which guides the bags into the positioning structure. The conveyor track 206 comprises two opposing guide grooves, along which the bags slide down under gravity. The bag's trajectory, defined by the conveyor track 206, passes through the gap between the front and rear suction cups of the bag opening device at the upper bag opening station.

[0036] A movable door 9 is provided at the bottom of the bag lowering positioning device 300A of the upper station. The bag lowering positioning device 300B of the lower station is provided below the bag lowering positioning device of the upper station and aligned with the bag lowering positioning device 300A of the upper station. When the movable door 9 is opened, the bags 801 discharged from the bag storage and bag dispensing device, i.e., the bags falling after bag dispensing, fall into the bag lowering positioning device of the lower station through the bag lowering positioning device of the upper station. When the movable door 9 is closed, the bags 801 fall into the bag lowering positioning device of the upper station and are blocked by the movable door 9. The bag lowering positioning devices of the upper and lower stations sequentially receive the bags 801 falling after bag dispensing in a designed order.

[0037] The positioning structure of the bag positioning device 300A of the upper workstation and the positioning structure of the bag positioning device 300B of the lower workstation both adopt bag rails 302 located on both sides for receiving the bags that fall after bagging. The movable door 9 corresponds to the bottom 302A of the positioning structure of the bag positioning device of the upper workstation; the bag positioning device of the lower workstation is also provided with a lifting mechanism; the positioning structure is connected to the lifting connection mechanism and can rise to the bag opening station of the lower workstation, and descend to release the restriction on the bag.

[0038] The movable door 9 can be driven by a cylinder 90, and the cylinder 90 can be installed on the cylinder fixing plate 408 of the bag opening device at the lower work station.

[0039] The number of the positioning structures of the upper-level station bag positioning device 300A and the positioning structures 302 of the lower-level station bag positioning device 300B corresponds to the number of the bag storage bins 201 .

[0040] The positioning structure of the bag positioning device 300A at the upper station can be fixed, which only requires leaving space on the side of the positioning structure to facilitate the bag clamping mechanism to clamp the bag from both sides.

[0041] The positioning structure of the bag positioning device 300B at the lower station is designed to be raised and lowered. When the movable door 9 is opened to deliver bags to the lower station, the lower bag track of the lower bag positioning device rises to receive the bags. After the bags are opened and handed over to the bag clamping mechanism, they descend to release the bag restraints. The lifting connection mechanism can use a cylinder 301 as a power source and be provided with a positioning structure lifting connection frame 304. The lifting connection frame 304 is connected to the cylinder 301 and can be driven to rise and fall. The positioning structure of the bag positioning device 300B at the lower station is mounted on the lifting connection frame 304. The lower bag tracks 302 on both sides of the positioning structure are respectively provided with inward-facing bag positioning grooves.

[0042] Furthermore, the lower bag tracks 302 on both sides can also be adjustable to accommodate bags of different sizes. The lower bag tracks 302 on each side are connected to the connecting frame 3021 on one side, and the lower bag tracks 302 on each other side are positioned and connected to the connecting frame 3022 on the other side, and guide rods 3023 are respectively provided. The connecting frame 3021 and the connecting frame 3022 can be moved by operating the hand wheel 3024 through the threaded connection structure.

[0043] The cylinder 301 is mounted on a mounting frame 305. Furthermore, the mounting frame 305 is mounted with adjustable height, allowing for height adjustment when changing specifications. A nut is provided at its fixed mounting location, which is threadedly connected to a lifting adjustment screw 308. The screw 308 is connected to a fixing base 310. The height of the mounting frame 305 can be adjusted by rotating the screw 308 with a handwheel 307. Reference numeral 306 denotes a guide slider fixedly connected to the mounting frame 305, and reference numeral 309 denotes a guide rail slidably connected to the guide slider 306.

[0044] The bag opening working parts of the bag opening devices of the upper and lower workstations can adopt the same scheme: a front suction cup 401 and a rear suction cup 402 are arranged in pairs, and the front suction cup 401 and the rear suction cup 402 are connected to a suction cup forward and backward moving mechanism, so that the front suction cup 401 and the rear suction cup 402 can move away from each other to open the bag and approach each other to stick to the bag wall. The suction cup forward and backward moving mechanism is connected to the suction cup lifting connection mechanism, and the bag opening working parts can descend to the position where the lower bag positioning device positions the bag, that is, the bag opening station S2, and rise to leave the opened bag clamped by the bag clamping mechanism on the reciprocating bag feeding device. In this embodiment, the suction cup forward and backward movement mechanism includes a connecting plate 403, a driving cylinder 404, a mounting plate 405 for the front suction cup 401, and a mounting plate 406 for the rear suction cup 402. The driving cylinder 404 includes a cylinder for driving the forward and backward movement of the mounting plate 405 and a cylinder for driving the forward and backward movement of the mounting plate 406. The suction cup forward and backward movement mechanism may also be provided with a guide structure for forward and backward movement. The connecting plate 403 is connected to the lifting driving cylinder 407 of the suction cup lifting connection mechanism. The front suction cup 401 and the rear suction cup 402 are arranged asymmetrically with respect to the connecting plate 403. The gap between the suction cup 401 and the rear suction cup 402 allows the falling bag to pass through. The lifting connection mechanism is provided with a cylinder fixing plate 408 and a lifting guide structure.

[0045] The upper and lower stations can use double-side station conveying or single-side station conveying; or the upper station uses double-side station conveying and the lower station uses single-side station conveying; or the upper station uses single-side station conveying and the lower station uses double-side station conveying. Through the solution of the present invention, the multi-station bag feeding device can choose to use two stations, three stations in different combinations, or four stations for bag feeding.

[0046] In this embodiment, the upper station uses double-sided conveying, while the lower station uses single-sided conveying. Correspondingly, two filling and sealing stations S3 are provided at the upper station, located on either side of the bag opening station S2 of the upper station. The lower station is provided with a filling and sealing station S3, located on either side of the bag opening station S2 of the lower station. The reciprocating bag feeding device of the upper station is equipped with a first set of bag clamping mechanisms and a second set of bag clamping mechanisms. The first set of bag clamping mechanisms moves back and forth between the bag opening station of the upper station and the first side filling and sealing station of the two-side filling and sealing stations, while the second set of bag clamping mechanisms moves back and forth between the bag opening station of the upper station and the second side filling and sealing station of the two-side filling and sealing stations. The reciprocating bag feeding device of the lower station is equipped with a single set of bag clamping mechanisms.

[0047] Filling and sealing stations S3 are equipped with filling and sealing devices. These devices can be located at the same bag delivery location or at different locations along the bag conveying direction. The filling devices of the upper and lower filling and sealing stations S3 are equipped with corresponding numbers of filling heads, and the sealing devices are equipped with corresponding numbers of sealing mechanisms. The filling devices of both upper and lower filling and sealing stations S3 can utilize the same design. The sealing devices of both upper and lower filling and sealing stations S3 can utilize the same design.

[0048] In this embodiment, the reciprocating bag feeding device at the upper workstation utilizes the following solution: a reciprocating conveyor mechanism 700 is provided, which can utilize a reciprocating belt or chain drive mechanism. Reference numeral 709 designates its drive mechanism. The reciprocating conveyor mechanism 700 includes a first set of bag clamping mechanisms 701 and a second set of bag clamping mechanisms 702. The reciprocating conveyor mechanism 700 can be a single powered reciprocating conveyor mechanism 700 that synchronously and equidistantly transports the first and second sets of bag clamping mechanisms 701 and 702. However, for a solution with workstations arranged on upper and lower levels, if each level utilizes double-sided workstation feeding, the first and second sets of bag clamping mechanisms are driven by separate reciprocating conveyor mechanisms. In this embodiment, the upper workstation adopts this solution. The first group of bag clamping mechanisms 701 and the second group of bag clamping mechanisms 702 each have their own reciprocating conveying mechanisms 700. Each reciprocating conveying mechanism 700 is driven by its own different driving mechanism 709, and can convey the first group of bag clamping mechanisms 701 and the second group of bag clamping mechanisms 702 asynchronously and at different distances.

[0049] In this embodiment, the reciprocating bag feeding device of the lower station adopts the following scheme: a reciprocating conveying mechanism 700 is provided, which can adopt a belt or chain transmission mechanism that performs reciprocating motion, and the reference numeral 709 is its driving mechanism. The reciprocating conveying mechanism 700 of the lower station is provided with a lower first set of bag clamping mechanisms 711.

[0050] As previously mentioned, the reciprocating conveyor device is provided with a matching number of bag clamping mechanisms. The number of bag clamping mechanisms in the first group of bag clamping mechanisms 701, the second group of bag clamping mechanisms 702, and the first group of bag clamping mechanisms 711 in the lower layer is equal and corresponds to the number of positioning structures 302. The first group of bag clamping mechanisms 701, the second group of bag clamping mechanisms 702, and the first group of bag clamping mechanisms 711 in the lower layer have the same structure.

[0051] The bag clamping drive mechanism and the adjusting power of the bag clamping mechanism of the reciprocating bag feeding device can be powers controlled by separate programs. The adjusting power is a driving mechanism for adjusting the distance between the left bag clamping assembly and the right bag clamping assembly of the bag clamping mechanism of the reciprocating bag feeding device.

[0052] From the above description, it can be seen that the multi-station bag feeding method provided by the present invention is:

[0053] A bag storage and separation station S1 is provided at the top for storing the bag stack 800 and separating the individual bags 801;

[0054] The bag feeding method is divided into two layers of workstations for bag feeding. The individual bags separated from the bag storage and bag separation workstation use the bag's own gravity to fall into the upper and lower workstations in sequence, so that the bags arrive at the workstations on the corresponding layer.

[0055] At the upper and lower workstations, bags are respectively delivered by the upper reciprocating bag delivery device and the lower reciprocating bag delivery device, and the bags are opened before the reciprocating bag delivery device delivers the bags.

[0056] Below the upper filling and sealing stations S3 and the lower filling and sealing stations S3, a bag unloading station S4 is provided. This allows filled and sealed bags to be released directly and fall by gravity onto a conveyor line or container below. Guide plates 802 can be provided at each upper filling and sealing station S3 to guide the bags downward.

[0057] Unless otherwise specified, in the present invention, if there are terms such as "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", etc. indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, they can combine the drawings and understand the specific meanings of the above terms according to specific circumstances.

[0058] Unless otherwise specified or limited, the terms "disposed," "clamped," and "connected" in this disclosure should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0059] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the field of the present invention are included in the protection scope of the present invention.

Claims

1. Multi-station bag feeding device, including bag storage and bag separation device; its characteristics are: The bag storage and bag separation device is arranged at the top, and the upper and lower workstations are arranged below the bag storage and bag separation device; each workstation is provided with a bag opening station, and the bag opening station is provided with a bag lowering positioning device and a bag opening device; Each workstation is equipped with a reciprocating bag feeding device; the reciprocating bag feeding device is equipped with a bag clamping mechanism to complete the bag transmission at each workstation; A movable door is provided at the bottom of the lower bag positioning device of the upper station, and the lower bag positioning device of the lower station is provided below the lower bag positioning device of the upper station and aligned with the lower bag positioning device of the upper station, so that when the movable door is opened, the bags discharged from the bag storage and bag dispensing device fall into the lower bag positioning device of the lower station through the lower bag positioning device of the upper station; In the upper workstations, the bag opening station of the upper workstation is centrally arranged, and filling and sealing stations are arranged on both sides of the bag opening station of the upper workstation; the reciprocating bag feeding device of the upper workstation is provided with a first set of bag clamping mechanisms and a second set of bag clamping mechanisms; the first set of bag clamping mechanisms moves back and forth between the bag opening station of the upper workstation and the first side filling and sealing station of the filling and sealing stations on both sides, and the second set of bag clamping mechanisms moves back and forth between the bag opening station of the upper workstation and the second side filling and sealing station of the filling and sealing stations on both sides; or / and, in the lower workstations, the bag opening workstation of the lower workstation is centrally arranged, and filling and sealing workstations are arranged on both sides of the bag opening workstation of the lower workstation; the reciprocating bag feeding device of the lower workstation is provided with a first group of bag clamping mechanisms and a second group of bag clamping mechanisms; the first group of bag clamping mechanisms moves back and forth between the bag opening workstation of the lower workstation and the first side filling and sealing workstation of the filling and sealing workstations on both sides, and the second group of bag clamping mechanisms moves back and forth between the bag opening workstation of the lower workstation and the second side filling and sealing workstation of the filling and sealing workstations on both sides; The positioning structures of the bag positioning device at the upper station and the bag positioning device at the lower station both use bag rails located on both sides to receive the bags that fall after bagging. The movable door corresponds to the bottom of the positioning structure of the bag positioning device at the upper station. The bag positioning device at the lower station is also provided with a lifting mechanism. The positioning structure is connected to the lifting mechanism so that it can rise to the bag opening station at the lower station and fall to release the bag from the restriction. The bag opening device is provided with a suction cup lifting connection mechanism, and the bag opening device is provided with a front suction cup and a rear suction cup, and the front suction cup and the rear suction cup are connected to the suction cup forward and backward movement mechanism, so that the front suction cup and the rear suction cup can move away from each other to open the bag and approach each other to stick to the bag wall, and the suction cup forward and backward movement mechanism is connected to the suction cup lifting connection mechanism, and can descend to the bag opening height and rise to leave the bag that has been opened and is clamped by the bag clamping mechanism on the reciprocating bag feeding device.

2. The multi-station bag feeding device according to claim 1, characterized in that The bag storing and separating device is provided with a plurality of parallel bag storing bins and corresponding bag separating mechanisms, and the bag storing bins are respectively provided with outlets; the bag lowering positioning device and the bag opening device are respectively provided with positioning structures and bag opening working parts corresponding to the number of bag storing bins, and the reciprocating bag feeding device is provided with a bag clamping mechanism matching the number of bag storing bins.

3. The multi-station bag feeding device according to claim 1, characterized in that In the upper workstation, the first and second bag clamping mechanisms are driven by different reciprocating conveying mechanisms; or / and, in the lower workstation, the first and second bag clamping mechanisms are driven by different reciprocating conveying mechanisms.

4. The multi-station bag feeding device according to claim 1, characterized in that A bag lowering device is also provided below the bag storing and separating device, which guides the falling bags into the bag lowering positioning device of the bag opening station at the upper workstation. The bag falling trajectory specified by the bag lowering device passes through the gap between the front suction cup and the rear suction cup of the bag opening device.

5. A multi-station bag feeding method of the multi-station bag feeding device according to any one of claims 1 to 4, characterized in that include: A bag storage and sorting station is set up on the top to store bag stacks and sort out individual bags; The bag feeding method is divided into two layers of workstations for bag feeding. The individual bags separated from the bag storage and bag separation workstation use the bag's own gravity to fall into the upper and lower workstations in sequence, so that the bags arrive at the workstations on the corresponding layer. At the upper and lower workstations, bags are respectively delivered by the upper reciprocating bag delivery device and the lower reciprocating bag delivery device, and the bags are opened before the reciprocating bag delivery device delivers the bags.

6. The multi-station bag feeding method according to claim 5, characterized in that : In the upper workstation, the bag opening station of the upper workstation is arranged in the center, and the filling and sealing stations are arranged on both sides of the bag opening station of the upper workstation; the reciprocating bag feeding device of the upper workstation is provided with a first group of bag clamping mechanisms and a second group of bag clamping mechanisms; the first group of bag clamping mechanisms moves back and forth between the bag opening station of the upper workstation and the first side filling and sealing station of the filling and sealing stations on both sides to feed and take out bags, and the second group of bag clamping mechanisms moves back and forth between the bag opening station of the upper workstation and the second side filling and sealing station of the filling and sealing stations on both sides to feed and take out bags; or / And, in the lower workstations, the bag opening station of the lower workstation is arranged in the center, and filling and sealing stations are arranged on both sides of the bag opening station of the lower workstation; the reciprocating bag feeding device of the lower workstation is provided with a first group of bag clamping mechanisms and a second group of bag clamping mechanisms; the first group of bag clamping mechanisms moves back and forth between the bag opening station of the lower workstation and the first side filling and sealing station of the filling and sealing stations on both sides to feed and take bags, and the second group of bag clamping mechanisms moves back and forth between the bag opening station of the lower workstation and the second side filling and sealing station of the filling and sealing stations on both sides to feed and take bags.

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