Bag opening structure and bag feeding type packaging machine

Abstract

The utility model discloses a bag opening structure and a bag feeding type packaging machine, the bag opening structure comprises a suction cup assembly, an elastic piece and a bag opening driving piece, the suction cup assembly comprises a first suction cup and a second suction cup which are used for adsorbing the two sides of a packaging bag, and the first suction cup and the second suction cup are arranged in a staggered mode; the elastic piece is provided with an elastic part and a movable part movably arranged on the outer side of the first suction cup in a sleeving mode, and the movable part corresponds to the second suction cup in position so that the elastic part can be compressed when the second suction cup is pressed; the driving end of the bag opening driving part is connected with the first suction cup and the elastic part and used for driving the first suction cup and the movable part to move relative to the second suction cup, staggered bag opening can be achieved, a packaging bag can be flattened through retraction of the elastic part, the suction cups can make full contact with the surface of a bag body, the packaging bag can be conveniently opened through the suction cups, and the packaging bag is convenient to use. The problem that a thin bag is difficult to open is solved, the bag opening effect is improved, and the bag opening efficiency and the production efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging equipment, in particular to a bag opening structure and a bag feeding type packaging machine. Background Art

[0002] The bag-feeding packaging machine replaces manual packaging and realizes packaging automation for large and small enterprises. The operator only needs to put the finished bags one by one, or hundreds of bags at a time, on the bag-taking part of the equipment. The mechanical gripper of the equipment will automatically take the bags, print the date, open the bags, give the metering device a signal to measure, and then drop the materials, seal, and output. Customers can also add detailed functions such as door opening emergency stop, automatic card insertion, and abnormal discharge according to product packaging requirements. The entire packaging process does not require manual operation, which effectively improves the company's production efficiency, saves labor costs and management costs, and greatly reduces costs.

[0003] For example, the patent with publication number CN116902309A provides a packaging device and a bag-feeding packaging machine, which includes an upward bag moving component, a bag opening component, a material unloading component, a sealing component and a downward bag moving component. The bag opening component mainly includes a bag opening cylinder and a bag opening suction cup. The front and rear bag opening suction cups are used to simultaneously adsorb both sides of the packaging bag, and the bag opening motor drives the bag moving devices on both sides to move toward the middle at the same time, and the bag opening cylinders on the first bag opening structure and the second bag opening structure are retracted at the same time to open the packaging bag.

[0004] The existing bag-feeding packaging machine generally opens the bag by two bag-opening suction cups arranged opposite to each other. However, when opening thin bags, since the thin bags are relatively soft, part of the bag body will overlap in the middle, and wrinkles will easily appear on the surface of the thin bags, resulting in unevenness, which is not conducive to the suction of the suction cups. It is difficult to open the thin bags using the suction cups of the existing bag-feeding packaging machines, resulting in a low bag opening rate of the existing bag-feeding packaging machines, thereby reducing production efficiency. Utility Model Content

[0005] The utility model aims to overcome the above technical deficiencies, and proposes a bag opening structure and a bag feeding packaging machine, so as to solve the technical problems in the prior art that the bag packaging machine is difficult to open thin bags, has a low bag opening rate, and reduces production efficiency.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] In the first aspect, the utility model provides a bag opening structure and a bag feeding packaging machine, comprising: a suction cup assembly, an elastic member and a bag opening drive member, the suction cup assembly comprising a first suction cup and a second suction cup for adsorbing both sides of the packaging bag, the first suction cup and the second suction cup being staggered; the elastic member comprises an elastic portion and a movable portion movably sleeved on the outside of the first suction cup, the movable portion corresponds to the position of the second suction cup so as to compress the elastic portion when the second suction cup is pressed; the driving end of the bag opening drive member is connected to both the first suction cup and the elastic portion, so as to drive the first suction cup and the movable portion to move relative to the second suction cup.

[0008] In some embodiments, the bag opening drive component includes a bag opening cylinder and a connecting plate, the driving end of the bag opening cylinder is connected to the connecting plate, and the first suction cup and the elastic component are both connected to the connecting plate; the elastic end of the elastic component includes a spring, and the movable end of the elastic component includes an elastic plate and a guide rod, the elastic plate is arranged on the outer side of the first suction cup, and an opening is provided in the middle for the first suction cup to pass through, one end of the guide rod is connected to the elastic plate, and the other end is slidably connected to the connecting plate, and the two ends of the spring are respectively connected to the elastic plate and the connecting plate.

[0009] In some embodiments, two of the first suction cup and the second suction cup are provided, and the two second suction cups are located outside the two first suction cups. Both ends of the elastic flat plate extend to the outside of the two first suction cups respectively to form two elastic planes corresponding to the two second suction cups respectively.

[0010] In a second aspect, the utility model further provides a bag-feeding packaging machine, comprising any one of the bag opening structures described above.

[0011] In some embodiments, the bag-feeding packaging machine also includes a frame, a bag-picking structure and a clamping structure, wherein the interior and one side of the frame respectively form a bag placing area and a loading area; the bag-picking structure is arranged in the frame to transfer the packaging bag from the bag placing area to the loading area; the clamping structure is arranged in the loading area to clamp the two sides of the packaging bag; the first suction cup and the second suction cup are respectively located on both sides of the loading area.

[0012] In some embodiments, the bag picking structure includes a bag picking suction cup assembly, a telescopic drive component and a rotary drive component. The telescopic drive component is connected to the bag picking suction cup assembly through a suction cup frame to drive the bag picking suction cup assembly to approach the bag placing area so that the bag picking suction cup assembly can be adsorbed on the packaging bag. The driving end of the rotary drive component is connected to the telescopic drive component to drive the bag picking suction cup assembly to rotate to a set angle through the telescopic drive component to transfer the packaging bag from the bag placing area to the loading area. Wherein, the bag picking suction cup assembly and the telescopic drive component are each provided with two groups for adsorbing the two sides of the side of the packaging bag.

[0013] In some embodiments, the clamping structure includes two pneumatic clamping fingers respectively arranged at both ends of the loading area and two closing structures respectively connected to the pneumatic clamping fingers, each of the closing structures includes a loosening cylinder and a tightening cylinder, the tightening cylinder is installed on the frame, and its driving end is connected to the loosening cylinder, and the loosening cylinder is connected to the pneumatic clamping fingers.

[0014] In some embodiments, the bag-feeding packaging machine also includes a unloading structure and a sealing structure, the unloading structure includes a belt conveyor and a unloading hopper, the belt conveyor is installed on the top of the frame, the unloading hopper is arranged on one side of the belt conveyor, and the inlet of the unloading hopper corresponds to the unloading port of the belt conveyor, and the outlet of the unloading hopper corresponds to the loading area; the sealing structure includes two relatively arranged sealing strips and a sealing drive, the two sealing strips are respectively connected to the first mounting frame and the second mounting frame of the bag opening structure, and the sealing drive is connected to the first mounting frame, and is used to drive the first mounting frame to move relative to the first mounting frame, so that the two sealing strips are respectively pressed on both sides of the bag opening of the packaging bag for sealing.

[0015] In some embodiments, the bag-feeding packaging machine also includes a bag placing structure, which includes a bag placing plate and a bag placing driving member. The bag placing plate is slidably arranged on the frame, and a first bag placing station and a second bag placing station are formed on the bag placing plate. The driving end of the bag placing driving member is connected to the bag placing plate to drive the bag placing plate to move so that the first bag placing station and the second bag placing station intermittently correspond to the bag placing area; a plurality of guide pillars are arranged in the bag placing plate along the edges of the first bag placing station and the second bag placing station.

[0016] Compared with the prior art, the bag opening structure and bag feeding packaging machine provided by the utility model have a suction cup assembly, an elastic member and a bag opening driving member, and the first suction cup and the second suction cup are staggered. The bag opening driving member can drive the first suction cup and the movable part to move relative to the second suction cup. The movable part of the elastic member corresponds to the position of the second suction cup, so that after the movable part presses the second suction cup during movement, it can generate pressure to shrink the elastic part. The second suction cup squeezes the packaging bag toward the rear side of the first suction cup, thereby flattening the thin bag, so that the first suction cup and the second suction cup can fully contact the surface of the bag body, and the suction and bag opening work is convenient. The technical solution can realize staggered bag opening, and realize flattening of the packaging bag by the retraction of the elastic member, so that the suction cup can fully contact the surface of the bag body, and the packaging bag can be opened conveniently by using the suction cup, thereby improving the bag opening effect and being beneficial to improving the bag opening efficiency and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the bag opening structure provided by an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the top view of the bag opening structure provided by an embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the overall three-dimensional structure of the bag-feeding packaging machine provided by the embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of the overall front cross-sectional structure of the bag-feeding packaging machine provided by an embodiment of the utility model;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of a bag placing structure and a bag taking structure of a bag feeding type packaging machine provided by an embodiment of the utility model;

[0022] Figure 6 It is a bottom three-dimensional structural schematic diagram of a bag placing structure of a bag-feeding packaging machine provided by an embodiment of the utility model;

[0023] Figure 7 It is a three-dimensional structural schematic diagram of the clamping structure of the bag-feeding packaging machine provided by an embodiment of the utility model;

[0024] Figure 8 It is a three-dimensional structural schematic diagram of the bag opening structure and the sealing structure of the bag feeding type packaging machine provided by the embodiment of the utility model;

[0025] Fig. 9 It is a schematic diagram of the top view of the bag opening structure and the sealing structure of the bag feeding type packaging machine provided by the embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Frame; 11. Pulley;

[0028] 2. Bag placing structure; 21. Bag placing plate; 22. Bag placing driving member; 23. Guide column; 24. Support roller;

[0029] 3. Bag taking structure; 31. Bag taking suction cup assembly; 32. Telescopic driving member; 33. Rotating driving member; 34. Suction cup frame;

[0030] 4. Clamping structure; 41. Pneumatic clamping finger; 42. Release cylinder; 43. Tighten cylinder;

[0031] 5. Bag opening structure; 51. Suction cup assembly; 511. First suction cup; 512. Second suction cup; 513. Second mounting plate; 52. Elastic member; 521. Spring; 522. Elastic plate; 523. Guide rod; 53. Bag opening drive member; 531. Bag opening cylinder; 532. Connecting plate; 54. Linear axis; 55. First mounting frame; 56. Second mounting frame;

[0032] 6. Material discharge structure; 61. Belt conveyor; 62. Material discharge hopper;

[0033] 7. Sealing structure; 71. Sealing strip; 72. Sealing drive member. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0035] In order to solve the technical problems in the prior art that bag-type packaging machines are difficult to open thin bags, have a low bag opening rate, and reduce production efficiency, the utility model provides a bag opening structure and a bag-feeding packaging machine, which can realize staggered bag opening and flatten the packaging bag through the retraction of the elastic member so that the suction cup can fully contact the surface of the bag body, making it convenient to use the suction cup to open the packaging bag, solving the problem of difficulty in opening thin bags, improving the bag opening effect, and also being conducive to improving the bag opening efficiency and production efficiency.

[0036] It should be noted that the bag opening structure described in the utility model is used for but not limited to bag-feeding packaging machines, etc. For the convenience of explanation, in the utility model, only the bag opening structure applied to the bag-feeding packaging machine is used as an example for explanation, and the principle of applying the bag opening structure to other types of equipment is essentially the same as the principle applied to the bag-feeding packaging machine, which will not be repeated here.

[0037] First, see Figure 1 and Figure 2 , an embodiment of the present application provides a bag opening structure, which includes: a suction cup assembly 51, an elastic member 52 and a bag opening driving member 53, wherein the suction cup assembly 51 includes a first suction cup 511 and a second suction cup 512 for adsorbing both sides of the packaging bag, and the first suction cup 511 and the second suction cup 512 are staggered; the elastic member 52 has an elastic portion and a movable portion movably sleeved on the outside of the first suction cup 511, and the movable portion corresponds to the position of the second suction cup 512, so as to compress the elastic portion when the second suction cup 512 is pressed; the driving end of the bag opening driving member 53 is connected to both the first suction cup 511 and the elastic portion, so as to drive the first suction cup 511 and the movable portion to move relative to the second suction cup 512.

[0038] In this solution, a suction cup assembly 51, an elastic member 52 and a bag opening driving member 53 are provided. The suction cup assembly 51 includes a first suction cup 511 and a second suction cup 512. The first suction cup 511 and the second suction cup 512 are staggered and are used to absorb the bag body on both sides of the packaging bag and open the bag body. The movable part of the elastic member 52 is movably sleeved on the outside of the first suction cup 511, and the driving end of the bag opening driving member 53 is connected to both the first suction cup 511 and the elastic part. The elastic part has the ability to shrink and reset. Therefore, during implementation, The bag opening driving component 53 can be used to drive the first suction cup 511 and the movable part to move relative to the second suction cup 512. The movable part of the elastic component 52 corresponds to the position of the second suction cup 512, so that when the movable part presses the second suction cup 512 during movement, it can generate pressure to contract the elastic part. The second suction cup 512 squeezes the packaging bag toward the rear side of the first suction cup 511, thereby flattening the thin bag, so that the first suction cup 511 and the second suction cup 512 can fully contact the surface of the bag body, thereby facilitating the suction and bag opening work.

[0039] In order to drive the first suction cup 511 and the movable part to move relative to the second suction cup 512, in this embodiment, the bag opening drive 53 includes a bag opening cylinder 531 and a connecting plate 532, the elastic end of the elastic part 52 includes a spring 521, and the movable end of the elastic part 52 includes an elastic plate 522 and a guide rod 523.

[0040] The driving end of the bag opening cylinder 531 is fixedly connected to the connecting plate 532, and the first suction cup 511 and the elastic member 52 are both connected to the connecting plate 532; the elastic plate 522 is arranged in parallel with the connecting plate 532, and the elastic plate 522 is arranged on the outer side of the first suction cup 511, and an opening is provided in the middle thereof for the first suction cup 511 to pass through, so that after the elastic plate 522 presses the second suction cup 512, the elastic plate 522 is retracted backward by the generated pressing force; one end of the guide rod 523 is fixedly connected to the elastic plate 522, and the other end passes through the connecting plate 532 and is slidably connected to the connecting plate 532, and the two ends of the spring 521 are fixedly connected to the elastic plate 522 and the connecting plate 532 respectively.

[0041] During implementation, when the bag opening cylinder 531 drives the connecting plate 532 to move toward the second suction cup 512, the connecting plate 532 drives the spring 521, the guide rod 523 and the elastic plate 522 to move toward the second suction cup 512. After the elastic plate 522 contacts the second suction cup 512, the bag opening cylinder 531 continues to drive the connecting plate 532 to move, so that the first suction cup 511 moves toward the back of the second suction cup 512. The second suction cup 512 squeezes the elastic plate 522, so that the spring 521 contracts, and the elastic plate 522 retracts toward the direction close to the connecting plate 532, so that the first suction cup 511, the second suction cup 512 and the elastic plate 522 cooperate to flatten the packaging bag.

[0042] In order to further improve the bag opening effect, in some embodiments, two of the first suction cup 511 and the second suction cup 512 are provided, and the two second suction cups 512 are located on the outside of the two first suction cups 511, and the two ends of the elastic flat plate 522 extend to the outside of the two first suction cups 511 respectively, forming two elastic planes corresponding to the two second suction cups 512 respectively.

[0043] Furthermore, in some embodiments, four springs 521 and guide rods 523 are provided, and the springs 521 are sleeved on the outside of the guide rods 523. The springs 521 and guide rods 523 are arranged in a rectangular array on the side of the elastic plate 522 away from the second suction cup 512, which can improve the stability of the elastic plate 522.

[0044] In this embodiment, the model of the bag opening cylinder 531 is: CDQMB12-40.

[0045] It should be noted that, in other embodiments, the bag opening cylinder 531 may also be other bag opening driving components that can drive the connecting plate 532 to translate, such as an electric telescopic rod, a hydraulic cylinder or a linear motor.

[0046] Second, see Figures 3 to 9 An embodiment of the present application provides a bag-feeding packaging machine, comprising the bag opening structure provided in any of the above embodiments.

[0047] In this embodiment, the bag-feeding packaging machine includes a frame 1, a bag placing structure 2, a bag taking structure 3, a clamping structure 4, a bag opening structure 5, a material discharging structure 6 and a sealing structure 7. The bag placing structure 2, the bag taking structure 3, the clamping structure 4, the bag opening structure 5, the material discharging structure 6 and the sealing structure 7 are all installed on the frame 1, and the interior and one side of the frame 1 form a bag placing area and a material discharging area respectively; the bag taking structure 3 is arranged in the frame 1 to transfer the packaging bag from the bag placing area to the material discharging area; the clamping structure 4 is arranged in the material discharging area to clamp the two sides of the packaging bag, the bag opening structure 5 is used to open the packaging bag, the material discharging structure 6 is used to convey materials into the opened packaging bag, and the sealing structure 7 is used to seal the bag mouth of the packaging bag; wherein the first suction cup 511 and the second suction cup 512 are respectively located on both sides of the material discharging area.

[0048] In some embodiments, pulleys 11 are provided at the four corners of the bottom of the frame 1 to facilitate movement and adjustment of the position of the device.

[0049] In one embodiment, see Figures 3 to 6The bag placing structure 2 includes a bag placing plate 21 and a bag placing driving member 22. The bag placing plate 21 is slidably arranged on the frame 1. A first bag placing station and a second bag placing station are formed on the bag placing plate 21. The first bag placing station and the second bag placing station can correspond to the bag placing area formed inside the frame 1, so that the bag taking structure 3 can transport the packaging bags in the bag placing area to the loading area. The driving end of the bag placing driving member 22 is connected to the bag placing plate 21 to drive the bag placing plate 21 to move, so that the first bag placing station and the second bag placing station intermittently correspond to the bag placing area, so as to perform double-station bag supply and ensure uninterrupted packaging work; a plurality of guide pillars 23 are arranged along the edges of the first bag placing station and the second bag placing station in the bag placing plate 21, and the guide pillars 23 have the function of separating the bag placing stations and limiting the bag placing positions.

[0050] In order to improve the stability of the bag placing tray 21, the bag placing driving component 22 is arranged on one side of the bottom of the bag placing tray 21, and a plurality of parallel supporting rollers 24 are arranged on the other side of the bottom of the bag placing tray 21. The plurality of supporting rollers 24 are distributed along the movement direction of the bag placing tray 21 and are rotatably connected to the frame 1 to support the bag placing tray 21 on the other side.

[0051] Preferably, the bag placing driving member 22 is a slide cylinder, both ends of which are fixedly connected to the frame 1 , and the sliding portion in the middle is fixedly connected to the bag placing plate 21 .

[0052] In this embodiment, the model of the slide cylinder is STMB16X300.

[0053] In one embodiment, see Figures 3 to 5 The bag taking structure 3 includes a bag taking suction cup assembly 31, a telescopic driving member 32 and a rotating driving member 33. The bag taking suction cup assembly 31 includes two suction cups, and the two suction cups are fixed on a suction cup frame 34. The telescopic driving member 32 is fixedly connected to the suction cup of the bag taking suction cup assembly 31 through the suction cup frame 34. The telescopic driving member 32 can drive the suction cup to rise and fall, so as to drive the bag taking suction cup assembly 31 to approach the bag placing area, so that the suction cup of the bag taking suction cup assembly 31 can contact and adsorb on the packaging bag, so as to transport the packaging bag. The bag taking suction cup assembly 31 and the telescopic driving member 32 are both provided with two groups, which are used to adsorb the two sides of one side of the packaging bag to ensure the conveying effect.

[0054] The rotating driving member 33 is installed on the frame 1, and the driving end of the rotating driving member 33 is fixedly connected to the telescopic driving member 32, so that the telescopic driving member 32 can drive the bag picking suction cup assembly 31 to rotate 90° upward around the driving end of the rotating driving member 33, thereby transferring the packaging bag from the bag placing area to the loading area.

[0055] Preferably, the telescopic driving member 32 is a cylinder with a model number of TN10-80; the rotating driving member 33 is a side posture cylinder with a model number of HADN-50-40PARBT.

[0056] In one embodiment, see Figure 3 and Figure 7 The clamping structure 4 includes two pneumatic clamping fingers 41 respectively arranged at the two ends of the loading area and two closing structures respectively connected to the pneumatic clamping fingers 41. Each of the closing structures includes a loosening cylinder 42 and a tightening cylinder 43. The tightening cylinder 43 is installed on the frame 1, and its driving end is fixedly connected to the loosening cylinder 42, and the loosening cylinder 42 is fixedly connected to the pneumatic clamping fingers 41.

[0057] After the packaging bag is transported to the loading area by the bag taking structure 3, the two sides of the packaging bag correspond to the clamping fingers of the two pneumatic clamping fingers 41. The two pneumatic clamping fingers 41 can be used to clamp the two sides of the packaging bag. When opening the bag, the packaging bag is loosened by the contraction of the loosening cylinder 42; when sealing, the loosening cylinder 42 is reset, and the packaging bag is tightened again by the tightening cylinder 43.

[0058] Preferably, the models of the loosening cylinder 42 and the tightening cylinder 43 are both TN10-80, and the model of the pneumatic clamping finger 41 is HFR16.

[0059] In one embodiment, see Figure 3 The unloading structure 6 includes a belt conveyor 61 and a unloading hopper 62. The belt conveyor 61 is fixedly installed on the top of the frame 1. The unloading hopper 62 is arranged on one side of the belt conveyor 61. The unloading hopper 62 is installed on one side of the frame 1. Its inlet corresponds to the unloading port of the belt conveyor 61, and its outlet corresponds to the loading area. The materials to be packaged are transported to the unloading hopper 62 through the conveyor belt of the belt conveyor 61, and finally enter the packaging bag through the unloading hopper 62.

[0060] In one embodiment, see Figure 8 and Fig. 9The sealing structure 7 includes two sealing strips 71 and a sealing drive 72 which are arranged opposite to each other. The two sealing strips 71 are fixedly connected to the first mounting frame 55 and the second mounting frame 56 of the bag opening structure 5, respectively. Two parallel linear shafts 54 are fixedly installed in the frame 1. The first mounting frame 55 is slidably connected to the linear shaft 54, and the second mounting frame 56 is fixedly connected to the linear shaft 54. The sealing drive 72 is fixedly connected to the first mounting frame 55, and is used to drive the first mounting frame 55 to slide on the linear shaft 54 ​​and move relative to the first mounting frame 55, so that the two sealing strips 71 are respectively pressed against the two sides of the bag opening of the packaging bag for sealing. In some embodiments, the second suction cup 512 is fixed to the second mounting frame 56 through the second mounting plate 513.

[0061] Preferably, the sealing drive member 72 is a cylinder, and its model is: TN10-80.

[0062] It should be noted that, in other embodiments, the specific forms of the bag placing drive 22, telescopic drive 32, rotary drive 33, release cylinder 42, tightening cylinder 43, pneumatic clamping fingers 41 and sealing drive 72 are not limited thereto, and may also be other components that can realize corresponding functions.

[0063] During implementation, the bag body is placed on the first station or the second station on the bag placing plate 21, and the bag placing driving member 22 drives the first station and the second station to intermittently correspond to the bag taking position of the bag taking structure 3, and the bag is continuously supplied. The device sequentially performs bag taking, bag clamping, bag opening, material feeding and sealing.

[0064] When taking a bag, the bag taking cylinder drives the bag taking suction cup downward to press against one side of the packaging bag. At this time, negative pressure is generated in the bag taking suction cup to absorb the packaging bag. Then, the side posture cylinder drives the bag taking suction cup to rotate around the driving end of the side posture cylinder to transport the packaging bag to the unloading area on one side of the frame 1, and the above operation is repeated for repeated feeding.

[0065] When clamping the bag, two pneumatic clamping fingers 41 of the clamping mechanism are used to clamp the two sides of the packaging bag;

[0066] When opening the bag, the bag opening cylinder 531 drives the connecting plate 532 to move toward the second suction cup 512, and drives the spring 521, the guide rod 523 and the elastic plate 522 to move toward the second suction cup 512 through the connecting plate 532. After the elastic plate 522 contacts the second suction cup 512, the bag opening cylinder 531 continues to drive the connecting plate 532 to move, so that the first suction cup 511 moves toward the end of the second suction cup 512 away from the adsorption surface, and the second suction cup 512 squeezes the elastic plate 522, so that the spring 521 contracts, and the elastic plate 522 is pressed against the second suction cup 512. The plate 522 retracts toward the direction of approaching the connecting plate 532, so that the first suction cup 511, the second suction cup 512 and the elastic flat plate 522 cooperate to flatten the packaging bag, and then the first suction cup 511 and the second suction cup 512 are used to suck the two sides of the packaging bag respectively, and the bag opening cylinder 531 drives the first suction cup 511 to reset, and the spring 521 and the elastic flat plate 522 are reset at the same time, and the first suction cup 511 and the second suction cup 512 are used to open the bag opening, and at the same time, the shrinking cylinder drives the two pneumatic clamping fingers 41 to approach to release the bag opening;

[0067] When unloading, the materials to be packaged are transported to the unloading hopper 62 through the conveyor belt of the belt conveyor 61, and finally enter the packaging bag through the unloading hopper 62;

[0068] During sealing, the sealing driving member 72 drives the first mounting frame 55 to slide on the linear shaft 54 ​​and move relative to the first mounting frame 55, so that the two sealing strips 71 are respectively pressed against the two sides of the bag opening of the packaging bag to seal.

[0069] The utility model provides a suction cup assembly 51, an elastic member 52 and a bag opening driving member 53, wherein the first suction cup 511 and the second suction cup 512 are staggered, and the bag opening driving member 53 can drive the first suction cup 511 and the movable part to move relative to the second suction cup 512, and the movable part of the elastic member 52 corresponds to the position of the second suction cup 512, so that after the movable part presses the second suction cup 512 during movement, it can generate pressure to shrink the elastic part, and the second suction cup 512 squeezes the packaging bag toward the rear side of the first suction cup 511, so that the thin bag can be flattened, so that the first suction cup 511 and the second suction cup 512 can fully contact the surface of the bag body, and the suction and bag opening work can be conveniently performed; the technical solution can realize staggered bag opening, and realize flattening of the packaging bag through the retraction of the elastic member 52, so that the suction cup can fully contact the surface of the bag body, and the packaging bag can be conveniently opened by the suction cup, thereby solving the problem of difficulty in opening thin bags, improving the bag opening effect, and being conducive to improving the bag opening efficiency and production efficiency.

[0070] The utility model arranges a loading area on the outside of the frame 1, so that bag opening, loading and bag sealing are all performed on the outside of the machine, which is convenient for shipping finished products.

[0071] The utility model is provided with a bag placing structure 2, and a bag placing plate 21 of the bag placing structure 2 has two bag placing stations, which can perform left-right movable double-station bag supply, realize uninterrupted bag supply, and help improve production efficiency.

[0072] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A bag opening structure, characterized in that: include: A suction cup assembly, the suction cup assembly comprising a first suction cup and a second suction cup for adsorbing two sides of the packaging bag, wherein the first suction cup and the second suction cup are arranged staggered; an elastic member, the elastic member comprising an elastic portion and a movable portion movably sleeved on the outside of the first suction cup, the movable portion corresponding to the position of the second suction cup so as to compress the elastic portion when the second suction cup is pressed; and The bag opening driving member has a driving end connected to both the first suction cup and the elastic part, and is used to drive the first suction cup and the movable part to move relative to the second suction cup.

2. The bag opening structure according to claim 1, characterized in that: The bag opening driving component includes a bag opening cylinder and a connecting plate, the driving end of the bag opening cylinder is connected to the connecting plate, and the first suction cup and the elastic component are both connected to the connecting plate.

3. The bag opening structure according to claim 2, characterized in that: The elastic end of the elastic member includes a spring, and the movable end of the elastic member includes an elastic plate and a guide rod. The elastic plate is arranged on the outer side of the first suction cup, and an opening is opened in the middle thereof for the first suction cup to pass through. One end of the guide rod is connected to the elastic plate, and the other end is slidably connected to the connecting plate. The two ends of the spring are respectively connected to the elastic plate and the connecting plate.

4. The bag opening structure according to claim 3, characterized in that: Two of the first suction cups and the second suction cups are provided, and the two second suction cups are located outside the two first suction cups. Both ends of the elastic flat plate extend to the outsides of the two first suction cups respectively to form two elastic planes corresponding to the two second suction cups respectively.

5. A bag-feeding packaging machine, characterized in that: It comprises the bag opening structure as described in any one of claims 1 to 4.

6. The bag-feeding packaging machine according to claim 5, characterized in that: It also includes a frame, a bag taking structure and a clamping structure. The interior and one side of the frame respectively form a bag placing area and a loading area; the bag taking structure is arranged in the frame to transfer the packaging bags from the bag placing area to the loading area; the clamping structure is arranged in the loading area to clamp the two sides of the packaging bags; the first suction cup and the second suction cup are respectively located on both sides of the loading area.

7. The bag-feeding packaging machine according to claim 6, characterized in that: The bag picking structure includes a bag picking suction cup assembly, a telescopic driving member and a rotating driving member. The telescopic driving member is connected to the bag picking suction cup assembly through a suction cup frame to drive the bag picking suction cup assembly to approach the bag placing area so that the bag picking suction cup assembly can be adsorbed on the packaging bag. The driving end of the rotating driving member is connected to the telescopic driving member so that the bag picking suction cup assembly can be driven by the telescopic driving member to rotate a set angle to transfer the packaging bag from the bag placing area to the loading area. The bag picking suction cup assembly and the telescopic driving member are each provided with two groups for adsorbing the two sides of the side of the packaging bag.

8. The bag-feeding packaging machine according to claim 7, characterized in that: The clamping structure includes two pneumatic clamping fingers respectively arranged at the two ends of the loading area and two closing structures respectively connected to the pneumatic clamping fingers. Each of the closing structures includes a loosening cylinder and a tightening cylinder. The tightening cylinder is installed on the frame, and its driving end is connected to the loosening cylinder, and the loosening cylinder is connected to the pneumatic clamping fingers.

9. The bag-feeding packaging machine according to claim 6, characterized in that: The bag-feeding packaging machine also includes a feeding structure and a sealing structure. The unloading structure includes a belt conveyor and a unloading hopper, wherein the belt conveyor is installed on the top of the frame, and the unloading hopper is arranged on one side of the belt conveyor, and the inlet of the unloading hopper corresponds to the unloading port of the belt conveyor, and the outlet of the unloading hopper corresponds to the loading area; The sealing structure includes two sealing strips arranged opposite to each other and a sealing drive. The two sealing strips are respectively connected to a first mounting frame and a second mounting frame of the bag opening structure. The sealing drive is connected to the first mounting frame and is used to drive the first mounting frame to move relative to the first mounting frame so that the two sealing strips are respectively pressed against both sides of the bag opening of the packaging bag to seal it.

10. The bag-feeding packaging machine according to claim 6, characterized in that: The bag-feeding packaging machine further comprises a bag placing structure, the bag placing structure comprising a bag placing plate and a bag placing driving member, the bag placing plate is slidably arranged on the frame, a first bag placing station and a second bag placing station are formed on the bag placing plate, a driving end of the bag placing driving member is connected to the bag placing plate to drive the bag placing plate to move, so that the first bag placing station and the second bag placing station intermittently correspond to the bag placing area; A plurality of guide pillars are arranged in the bag placing plate along the edges of the first bag placing station and the second bag placing station.

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