Bag opening and pulling device

Abstract

This utility model discloses a bag opening and pulling device belonging to the field of packaging machine technology. The device is characterized by comprising a bag clamping mechanism, a bag opening mechanism, and a bag pulling mechanism. A feeding station is provided between the bag opening mechanism and the bag pulling mechanism, and a bag blowing mechanism is also provided between the bag opening mechanism and the feeding station. The bag opening mechanism pulls open the bag opening and compresses the two sides of the bag towards the center, causing the bag opening to expand to both sides. Subsequently, the bag blowing mechanism blows gas into the bag body, causing the inner wall of the bag to fully separate, avoiding insufficient opening of the bag opening due to adhesion of the inner wall, forming a stable bag opening shape. This ensures that the bag opening remains open during filling at the feeding station, allowing the material to be accurately and fully filled into the bag, effectively preventing material overflow and waste, and improving the stability and filling efficiency of the packaging process. After filling is completed, the bag clamping mechanism moves the bag to the pulling mechanism, which then flattens the bag opening again.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, specifically to a bag opening and pulling device. Background Technology

[0002] To automate packaging, automatic packaging machines are generally used instead of manual packaging. Operators only need to place the finished bags on the bag picking section of the machine, and the machine can automatically pick up the bags, move the bags, open the bags, fill the bags, and heat seal them.

[0003] Chinese utility model patent publication number "CN219044452U" discloses a bag-feeding packaging machine, including a frame, a bag feeding frame, a bag picking mechanism, a bag feeding mechanism, a bag clamping mechanism, a heat sealing mechanism, a hopper, and a bag opening mechanism. The frame has a bag feeding station, a material feeding station, and a heat sealing station arranged sequentially from left to right. The bag picking mechanism includes a bag picking support plate and a bag picking suction cup, with the suction cup mounted on the support plate. The bag feeding frame is mounted on the frame and corresponds to the bag feeding station. The bag clamping mechanism corresponds to the material feeding station. The lower outlet of the hopper corresponds to the material feeding station. The heat sealing mechanism corresponds to the heat sealing station. The bag opening mechanism includes an opening support plate, a rear suction cup at the bag opening, and a second reciprocating translation mechanism. The second reciprocating translation mechanism is mounted on the frame. The rear suction cup at the bag opening is mounted on the opening support plate. The rear suction cup is located at the material feeding station, and the bag picking suction cup aligns with the rear suction cup at the material feeding station.

[0004] However, the aforementioned bag-type packaging machine still has the following drawbacks: First, as can be seen from paragraphs

[0031] to

[0035] of the instruction manual, the bag opening mechanism can only pull the two sides of the packaging bag to move relative to each other, pulling the bag opening forward and backward to open the bag opening from both sides. However, when opening the bag, pulling only to the sides cannot guarantee the effective opening of the bag opening, resulting in the material not being able to be filled into the packaging bag, causing material waste.

[0005] Secondly, the bag opening mechanism only uses suction cups to pull the packaging bag open, which cannot completely separate the inner wall of the bag. The material cannot be effectively filled into the packaging bag, resulting in material overflow, contamination of the packaging bag and waste of material, and failing to meet the requirement of accurate filling of the packaging bag.

[0006] Therefore, it is necessary to improve upon the aforementioned shortcomings. Utility Model Content

[0007] The purpose of this invention is to provide an automatic bag opening and bag feeding device with stable bag feeding, so as to solve the above-mentioned problems existing in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is: a bag opening and pulling device, characterized in that: it includes a bag clamping mechanism, a bag opening mechanism, and a bag pulling mechanism, with a material feeding station between the bag opening mechanism and the bag pulling mechanism, and a bag blowing mechanism between the bag opening mechanism and the material feeding station. The bag opening mechanism is used to open the bag opening of the packaging bag, the bag blowing mechanism can blow the bag into the packaging bag and shrink both ends of the packaging bag inward, and the bag pulling mechanism is used to tighten the bag opening of the packaging bag.

[0009] By adopting the above technical solution: the bag opening mechanism first initially opens the bag opening and compresses the two sides of the bag towards the center, causing the bag opening to expand to both sides. Then, the bag blowing mechanism blows gas into the bag, which fully separates the inner wall of the bag and avoids insufficient opening of the bag opening due to adhesion of the inner wall, forming a stable bag opening shape. This ensures that the bag opening remains open when filling at the material unloading station, and the material can be accurately and fully filled into the bag, effectively preventing material overflow and waste, and improving the stability of the packaging process and the filling efficiency. After filling is completed, the bag clamping mechanism moves the bag to the belt pulling mechanism, which pulls the bag opening flat again to facilitate sealing the bag.

[0010] The aforementioned bag opening and pulling device can be further configured as follows: the bag opening mechanism includes a bag opening frame, an upper suction bag assembly, a lower suction bag assembly, a bag closing assembly, a first drive assembly, a second drive assembly, and a third drive assembly. The upper suction bag assembly and the lower suction bag assembly are vertically coaxially distributed on the bag opening frame. The first drive assembly can drive the upper suction bag assembly to open and close back and forth. The second drive assembly can drive the lower suction bag assembly to open and close back and forth. The third drive assembly can drive the bag closing assembly to open and close left and right.

[0011] By adopting the above technical solution: the first drive component and the second drive component can be controlled independently or synchronously, respectively driving the upper and lower suction bag components to perform precise opening and closing movements in the front and back directions, realizing reliable adsorption and separation traction on the upper and lower sides of the bag opening. Combined with the bag closing component driven by the third drive component to perform coordinated opening and closing in the left and right directions, the bag opening can be stretched and shaped simultaneously from four directions, making the bag opening more fully open and the shape more regular. This effectively avoids the problem of filling difficulties caused by incomplete bag opening or inner wall adhesion, and improves the success rate and stability of bag opening.

[0012] The aforementioned bag opening and pulling device can be further configured as follows: the upper suction bag assembly includes a first suction bag bracket and a second suction bag bracket; the first drive assembly includes a first motor, a first sliding frame, a first bracket slider, and a second bracket slider; the first suction bag bracket is linked with the first bracket slider, and the second suction bag bracket is linked with the second bracket slider; the first suction bag bracket is provided with a plurality of first suction bag tubes, and the second suction bag bracket is provided with a plurality of second suction bag tubes; the first suction bag tubes and the second suction bag tubes are symmetrically distributed; one end of each first suction bag tube and the second suction bag tube is provided with a plurality of first suction cups, and the other end is connected to a first air nozzle; the operation of the first motor drives the first bracket slider and the second bracket slider to slide relative to or towards each other along the axis of the first sliding frame, causing the first suction cups to contact the upper outer surface of the packaging bag and pull open the packaging bag opening.

[0013] By adopting the above technical solution: the first motor drives the first support slider and the second support slider to move synchronously and in opposite directions along the first sliding frame, thereby driving the first suction bag support and the second suction bag support, as well as the first suction bag tube and the second suction bag tube on them, to achieve precise relative or opposite movement. This allows the symmetrically distributed first suction cups to accurately contact and adsorb both sides of the upper edge of the packaging bag opening, and to stably and evenly pull the bag opening up to both sides, thus achieving effective opening of the bag opening. At the same time, the independently controlled upper suction bag assembly ensures the synchronicity and stability of the action, avoiding twisting or tearing of the bag opening due to uneven traction force on one side.

[0014] The aforementioned bag opening and pulling device can be further configured as follows: the lower suction bag assembly includes a third suction bag bracket and a fourth suction bag bracket. The third suction bag bracket is provided with a plurality of third suction bag tubes, and the fourth suction bag bracket is provided with a plurality of fourth suction bag tubes. The third and fourth suction bag tubes are symmetrically distributed. One end of each third and fourth suction bag tube is provided with a second suction cup, and the other end is connected to a second air nozzle. The second drive assembly includes a second motor, a second sliding frame, a first lead screw, a third support slider, and a fourth support slider. The third and fourth support sliders are slidably engaged with the second sliding frame. The first lead screw is linked with the output end of the second motor. The third and fourth support sliders are threadedly connected with the first lead screw. The third suction bag bracket is linked with the third support slider, and the fourth suction bag bracket is linked with the fourth support slider. The operation of the second motor drives the first lead screw to rotate. The third and fourth support sliders slide relative to or towards each other along the axis of the second sliding frame, causing the second suction cup to contact the lower outer surface of the packaging bag and pull open the packaging bag cavity.

[0015] By adopting the above technical solution: the second motor drives the first lead screw to rotate, which can precisely control the third and fourth support sliders to move synchronously and in opposite directions on the second sliding frame. This drives the symmetrically distributed third and fourth suction tubes and their second suction cups to move relative to or towards each other. This allows the second suction cups to reliably adsorb the lower edges of the packaging bag opening and apply a uniform downward traction force. Together with the upper suction bag assembly, this forms a coordinated bag-pulling action, effectively separating the inner walls of the front and rear sides of the bag body. This initially expands the bag cavity space, laying the foundation for the subsequent blowing mechanism to further blow open the bag body and completely separate the inner walls, thus improving the integrity and stability of the bag opening.

[0016] The aforementioned bag opening and pulling device can be further configured as follows: the bag closing assembly includes a third sliding frame and a fourth sliding frame. The third sliding frame is provided with a plurality of first left bag clamping parts, and the fourth sliding frame is provided with a plurality of second left bag clamping parts corresponding to the first bag clamping parts. The third sliding frame is slidably fitted with a plurality of fifth support sliders. One end face of each fifth support slider is provided with a plurality of first limiting rods spaced apart, and the other end is connected to a first support slide plate. The first support slide plate is provided with a plurality of sets of first right bag clamping parts. The fourth sliding frame is slidably fitted with a plurality of sixth support sliders. One end face of each sixth support slider is provided with a plurality of second limiting rods spaced apart, and the other end is connected to a second support slide plate. The second support slide plate is provided with a plurality of sets of second right bag clamping parts. The third drive assembly includes a first drive shaft, a fourth drive shaft, a fifth ... The device includes a drive connecting arm and a first drive rod. One end of the first drive connecting arm is connected to a first drive shaft, and the other end is fixedly connected to the first drive rod. A first limiting rod forms a first limiting groove, and a second limiting rod forms a second limiting groove. The first drive rod passes through the first limiting groove and the second limiting groove. A first drive plate is provided at the end of the first drive shaft away from the first drive connecting arm. A first transmission rack is provided on the first drive plate. The rotation of the first drive shaft drives the first drive rod to rotate around the central axis of the first drive shaft, causing the fifth bracket slider to move along the axis of the third sliding frame and the sixth bracket slider to move along the axis of the fourth sliding frame, causing the first left bag clamping piece and the first right bag clamping piece, the second left bag clamping piece, and the second right bag clamping piece to move relative to or towards each other, thereby opening the bag opening.

[0017] By adopting the above technical solution: when the first drive shaft rotates, the first drive connecting arm drives the first drive rod to move in an arc trajectory. The two ends of the first drive rod act on the first limiting groove and the second limiting groove respectively, pushing the fifth bracket slider to move synchronously towards or relative to the third sliding frame and the sixth bracket slider to move synchronously towards or relative to the fourth sliding frame. This drives the first right bag clamp and the first left bag clamp, and the second right bag clamp and the second left bag clamp to achieve precise synchronous opening and closing actions. It can apply uniform clamping force from both sides of the bag opening at the same time, effectively opening the bag opening to both sides and further expanding the bag opening.

[0018] The aforementioned bag opening and pulling device can be further configured as follows: the bag clamping mechanism includes a bag clamping drive, a rotating frame, a first clamping plate, a second clamping plate, and several sets of bag clamping opening and closing components. Several first pressing bag components are spaced apart on the first clamping plate, and several second pressing bag components are spaced apart on the second clamping plate. The bag clamping drive is equipped with a bag clamping slide plate, which is connected to the rotating frame through a drive connecting rod. The first clamping plate is linked with the rotating frame, and the second clamping plate is linked with the first clamping plate through the bag clamping opening and closing components. The operation of the bag clamping drive drives the rotating frame to rotate around the connecting shaft, thereby causing the first clamping plate and the second clamping plate to move laterally. The bag clamping opening and closing components can drive the first clamping plate and the second clamping plate to move relative to or towards each other, causing the first pressing bag components and the second pressing bag components to contact or separate from the outer surface of the packaging bag.

[0019] By adopting the above technical solution: the bag clamping drive component pushes the rotating frame to rotate around the connecting shaft through the drive connecting rod, thereby driving the first clamping plate to move laterally. At the same time, the bag clamping opening and closing component synchronously transmits the movement of the first clamping plate to the second clamping plate, enabling the first clamping plate and the second clamping plate to achieve precise relative or opposite movement. This drives the first bag pressing component and the second bag pressing component on them to work together to reliably clamp or release the outer surface of the packaging bag. This achieves the synchronization and stability of the bag clamping action, ensures the positioning accuracy of the packaging bag during the transfer process, effectively prevents the packaging bag from shifting or slipping during the workstation change process, and improves the continuity and reliability of the entire packaging process.

[0020] The aforementioned bag opening and pulling device can be further configured as follows: the bag clamping opening and closing assembly includes a bag clamping rotating shaft, a first connecting plate, a second connecting plate, and a limiting arm. One end of the bag clamping rotating shaft is provided with a driving connecting plate, and the other end is threadedly connected to the first connecting plate. The second connecting plate is threadedly connected to the middle of the bag clamping rotating shaft. The first clamping plate is linked with the first connecting plate, and the second clamping plate is linked with the second connecting plate. The rotation of the bag clamping rotating shaft drives the first connecting plate and the second connecting plate to move relative to or towards each other, thereby causing the first clamping plate and the second clamping plate to open and close.

[0021] By adopting the above technical solution: when the bag clamping shaft rotates, the positive and negative thread structures at both ends can synchronously drive the first connecting plate and the second connecting plate to move towards or relative to each other along the shaft axis, ensuring the synchronicity and accuracy of the opening and closing movements of the first clamping plate and the second clamping plate. This allows the first and second bag pressing components to smoothly and reliably clamp or release the packaging bag, effectively avoiding bag offset or deformation caused by asynchronous clamping. The limiting arm constrains the movement trajectory of the connecting plate, enhancing the stability of the bag clamping action and ensuring that the packaging bag maintains accurate positioning during the transfer process at the work station.

[0022] The aforementioned bag opening and pulling device can be further configured as follows: the bag blowing mechanism includes several sets of first clamping cylinders, several sets of second clamping cylinders, and a bag blowing assembly. The first clamping cylinders and second clamping cylinders are symmetrically distributed. The output end of the first clamping cylinder is provided with an arc-shaped first bag clamping plate, and the output end of the second clamping cylinder is provided with an arc-shaped second bag clamping plate. The first bag clamping plate and the second bag clamping plate are closed to form a bag blowing opening that accommodates the bag opening. The bag blowing assembly includes a bag blowing bracket and several sets of bag blowing rods. The bag blowing rods are coaxially distributed with the bag blowing opening. One end of the bag blowing rod near the bag blowing opening is provided with a bag blowing nozzle, and the other end is provided with a bag blowing air nozzle. A bag blowing detection mechanism is also provided below the bag blowing mechanism.

[0023] By adopting the above technical solution: the first clamping plate cylinder and the second clamping plate cylinder can synchronously drive the arc-shaped first clamping plate and the second clamping plate to move towards each other, close and form a blow-bag opening that adapts to the shape of the bag opening, so as to achieve effective wrapping and positioning of the bag opening. The blow-bag rod and the blow-bag opening are set coaxially, so that the blow-bag nozzle can be accurately aligned with the inside of the bag opening. The airflow introduced through the blow-bag nozzle can fully enter the bag body, so that the inner wall of the bag is completely separated and adhesion is avoided. At the same time, the blow-bag detection mechanism set below can monitor the bag opening status and blow-bag effect in real time to ensure that the bag filling degree meets the requirements.

[0024] The aforementioned bag opening and pulling device can be further configured as follows: the bag blowing detection mechanism includes a detection bracket, a first detection support plate, and a second detection support plate. The first detection support plate and the second detection support plate are spaced apart on the first detection bracket, forming a detection groove. A plurality of first detection elements are spaced apart on the first detection support plate, and a plurality of second detection elements are spaced apart on the second detection support plate. The first detection elements and the second detection elements are symmetrically distributed on both sides of the detection groove.

[0025] By adopting the above technical solution, the first and second detection components are symmetrically distributed on both sides of the detection groove, which enables bilateral and synchronous non-contact detection of the bag opening of the packaging bag passing through the detection groove. The opening status and position of the bag opening and the degree of bag filling after blowing are monitored in real time, ensuring the accuracy and reliability of the detection data.

[0026] The aforementioned bag-opening and bag-pulling device can be further configured as follows: the bag-pulling mechanism includes a fourth drive assembly, a fifth sliding frame, and a sixth sliding frame. The fifth sliding frame is provided with a plurality of third left bag-clamping components, and the sixth sliding frame is provided with a plurality of fourth left bag-clamping components corresponding to the third bag-clamping components. The fifth sliding frame is slidably fitted with a plurality of fifth support sliders. One end face of the fifth support slider is provided with a plurality of third limiting rods spaced apart, and the other end is connected to a third support slide plate. The third support slide plate is provided with a plurality of sets of third right bag-clamping components. The sixth sliding frame is slidably fitted with a plurality of sixth support sliders. One end face of the sixth support slider is provided with a plurality of fourth limiting rods spaced apart, and the other end is connected to a fourth support slide plate. The fourth support slide plate is provided with a plurality of sets of fourth right bag-clamping components. The fourth drive assembly includes a second drive shaft. The system includes a second drive connecting arm and a second drive rod. One end of the second drive connecting arm is connected to the second drive shaft, and the other end is fixedly connected to the second drive rod. A third limiting rod forms a third limiting groove, and a fourth limiting rod forms a fourth limiting groove. The second drive rod passes through the third and fourth limiting grooves. A second drive plate is provided at the end of the second drive shaft away from the second drive connecting arm. The second drive plate has a second transmission rack. The rotation of the second drive shaft drives the second drive rod to rotate around the central axis of the second drive shaft, causing the fifth bracket slider to move along the axis of the fifth sliding frame and the sixth bracket slider to move along the axis of the sixth sliding frame. This causes the third left bag clamping piece and the third right bag clamping piece, the fourth left bag clamping piece, and the fourth right bag clamping piece to move relative to or towards each other, thereby flattening the bag opening of the packaging bag.

[0027] By adopting the above technical solution: when the second drive shaft rotates, the second drive connecting arm drives the second drive rod to make an arc motion. The two ends of the second drive rod act on the third limit groove and the fourth limit groove respectively, thereby synchronously pushing the fifth bracket slider along the fifth sliding frame and the sixth bracket slider along the sixth sliding frame to move precisely relative to or towards each other. This allows the third left bag clamp and the third right bag clamp, as well as the fourth left bag clamp and the fourth right bag clamp, to apply uniform clamping force synchronously from both sides of the bag opening, smoothly flattening and tightening the bag opening, effectively eliminating bag opening wrinkles or skewing, and ensuring that the bag opening is in a flat and stable open state.

[0028] The beneficial effects of this utility model are as follows: After the bag clamping mechanism stably clamps the packaging bag, the upper suction bag assembly, lower suction bag assembly, and bag closing assembly of the bag opening mechanism work together from four directions (up, down, left, and right) to fully open the bag opening. Then, the bag blowing mechanism blows air into the bag to completely separate the inner wall of the bag. At the same time, the bag blowing detection mechanism monitors in real time to ensure that the bag opening status meets the standards. Finally, the bag pulling mechanism precisely pulls and tightens the bag opening after filling. This realizes the fully automated, efficient, and stable operation of the packaging bag from opening, bag blowing, filling to bag opening finishing. It effectively avoids problems such as incomplete bag opening, inner wall adhesion, insufficient filling, and poor sealing, and significantly improves packaging quality and production efficiency.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the bag opening and pulling device of this utility model; Figure 2 This is a schematic diagram of the bag clamping mechanism of this utility model; Figure 3 This is a schematic diagram of the bag opening mechanism of this utility model; Figure 4 This is a schematic diagram showing the cooperation between the upper suction bag assembly and the first drive assembly of this utility model; Figure 5 This is a schematic diagram showing the cooperation between the lower suction bag assembly and the second drive assembly of this utility model; Figure 6 This is a schematic diagram showing the cooperation between the bag-shrinking assembly and the third drive assembly of this utility model; Figure 7 This is a schematic diagram of the blow-bag mechanism of this utility model; Figure 8 This is a schematic diagram of the bag-pulling mechanism of this utility model; Label annotations: Bag clamping mechanism 1, bag clamping drive component 11, bag clamping slide plate 111, rotating frame 12, first clamping plate 13, first bag pressing component 131, second clamping plate 14, second bag pressing component 141, bag clamping opening and closing assembly 15, bag clamping rotating shaft 151, first connecting plate 152, second connecting plate 153, limiting arm 154. Bag opening mechanism 2, bag opening frame 21 Upper suction bag assembly 22, first suction bag bracket 221, second suction bag bracket 222, first suction bag tube 223, second suction bag tube 224, first suction cup 225, first air nozzle 226. Lower suction bag assembly 23, third suction bag bracket 231, fourth suction bag bracket 232, third suction bag tube 233, fourth suction bag tube 234, second suction cup 235, second air nozzle 236. The bag opening assembly 24, the third sliding frame 241, the first left bag clamp 2411, the fourth sliding frame 242, the second left bag clamp 2421, the fifth support slider 243, the first limiting rod 2431, the first support slide plate 2432, the first right bag clamp 2433, the first limiting groove 2434, the sixth support slider 244, the second limiting rod 2441, the second support slide plate 2442, the second right bag clamp 2443, and the second limiting groove 2444. First drive assembly 25, first motor 251, first sliding frame 252, first support slider 253, second support slider 254 Second drive assembly 26, second motor 261, second sliding frame 262, first lead screw 263, third support slider 264, fourth support slider 265 Third drive assembly 27, first drive shaft 271, first drive connecting arm 272, first drive rod 273, first drive plate 274, first transmission rack 275. Breathing nozzle assembly 28, breathing nozzle bracket 281, breathing nozzle tube 282, breathing nozzle 283, The bag-pulling mechanism 3, fourth drive assembly 31, second drive shaft 311, second drive connecting arm 312, second drive rod 313, second drive plate 314, second transmission rack 315, fifth sliding frame 32, third left bag clamping component 321, fifth support slider 322, third limiting rod 323, third support slide plate 324, third right bag clamping component 325, third limiting groove 326, sixth sliding frame 33, fourth left bag clamping component 331, sixth support slider 332, fourth limiting rod 333, fourth support slide plate 334, fourth right bag clamping component 335, fourth limiting groove 336. The bag blowing mechanism 4, first clamping plate cylinder 41, first bag clamping plate 411, second clamping plate cylinder 42, second bag clamping plate 421, bag blowing assembly 43, bag blowing bracket 431, bag blowing rod 432, bag blowing nozzle 433, bag blowing air nozzle 434, bag blowing opening 44, bag blowing detection mechanism 45, detection bracket 451, first detection support plate 452, second detection support plate 453, detection groove 454, first detection piece 455, second detection piece 456. Detailed Implementation

[0031] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] A bag opening and pulling device, such as Figures 1 to 8 As shown, it includes a bag clamping mechanism 1, a bag opening mechanism 2, and a bag pulling mechanism 3. A material unloading station is provided between the bag opening mechanism 2 and the bag pulling mechanism 3. A bag blowing mechanism 4 is also provided between the bag opening mechanism 2 and the material unloading station. The bag opening mechanism 2 is used to open the bag opening of the packaging bag. The bag blowing mechanism 4 can blow the bag into the packaging bag and shrink both ends of the packaging bag inward. The bag pulling mechanism 3 is used to tighten the bag opening of the packaging bag.

[0033] like Figure 2As shown, the bag clamping mechanism 1 includes a bag clamping drive 11, a rotating frame 12, a first clamping plate 13, a second clamping plate 14, and several sets of bag clamping opening and closing assemblies 15. Several first pressing bag members 131 are distributed at intervals on the first clamping plate 13, and several second pressing bag members 141 are distributed at intervals on the second clamping plate 14. The bag clamping drive 11 is provided with a bag clamping slide plate 111, which is connected to the rotating frame 12 through a drive connecting rod. The first clamping plate 13 is linked with the rotating frame 12, and the second clamping plate 14 is linked with the first clamping plate 13 through the bag clamping opening and closing assemblies 15. When the bag clamping drive 11 operates, it drives the rotating frame 12 to rotate around the connecting shaft, which in turn drives the first clamping plate 13 and the second clamping plate 14 to move laterally. The bag clamping opening and closing assemblies 15 can drive the first clamping plate 13 and the second clamping plate 14 to move relative to each other or towards each other, causing the first pressing bag members 131 and the second pressing bag members 141 to contact or separate from the outer surface of the packaging bag.

[0034] The bag clamping opening and closing assembly 15 includes a bag clamping shaft 151, a first connecting plate 152, a second connecting plate 153, and a limiting arm 154. One end of the bag clamping shaft 151 is provided with a driving connecting plate, and the other end is threadedly connected to the first connecting plate 152. The second connecting plate 153 is threadedly connected to the middle of the bag clamping shaft 151. The first clamping plate 13 is linked with the first connecting plate 152, and the second clamping plate 14 is linked with the second connecting plate 153. The rotation of the bag clamping shaft 151 drives the first connecting plate 152 and the second connecting plate 153 to move relative to or towards each other, causing the first clamping plate 13 and the second clamping plate 14 to open and close.

[0035] like Figure 3 As shown, the bag opening mechanism 2 includes a bag opening frame 21, an upper suction bag assembly 22, a lower suction bag assembly 23, a bag closing assembly 24, a first drive assembly 25, a second drive assembly 26, a third drive assembly 27, and a blower assembly 28. The upper suction bag assembly 22 and the lower suction bag assembly 23 are vertically coaxially distributed on the bag opening frame 21. The first drive assembly 25 can drive the upper suction bag assembly 22 to open and close back and forth. The second drive assembly 26 can drive the lower suction bag assembly 23 to open and close back and forth. The third drive assembly 27 can drive the bag closing assembly 24 to open and close left and right. The blower assembly 28 can blow air onto the bag opening to open the bag opening.

[0036] like Figure 4As shown, the upper suction bag assembly 22 includes a first suction bag bracket 221 and a second suction bag bracket 222. The first drive assembly 25 includes a first motor 251, a first sliding frame 252, a first bracket slider 253, and a second bracket slider 254. The first suction bag bracket 221 is linked with the first bracket slider 253, and the second suction bag bracket 222 is linked with the second bracket slider 254. The first suction bag bracket 221 is provided with a plurality of first suction tubes 223, and the second suction bag bracket 222 is provided with a plurality of second suction tubes 224. The first suction tubes 223 and the second suction tubes 224 are symmetrically distributed. One end of the first suction tubes 223 and the second suction tubes 224 is provided with a plurality of first suction cups 225, and the other end is connected to a first air nozzle 226. The operation of the first motor drives the first bracket slider 253 and the second bracket slider 254 to slide relative to or towards each other along the axis of the first sliding frame 252, causing the first suction cups 225 to contact the upper outer surface of the packaging bag and open the bag opening.

[0037] The blowing assembly 28 includes a bag blowing bracket 281 and several blowing tubes 282 mounted on the bag blowing bracket 281. The bag blowing bracket 281 is fixedly connected to the first suction bag bracket 221. The blowing tube 282 has a blowing nozzle 283 at the end away from the packaging bag. An air pump inputs gas from the blowing nozzle 283 and blows it from the end of the blowing tube 282 to the opening of the packaging bag, thus opening the packaging bag.

[0038] like Figure 5 As shown, the lower suction bag assembly 23 includes a third suction bag bracket 231 and a fourth suction bag bracket 232. The third suction bag bracket 231 has several third suction bag tubes 233, and the fourth suction bag bracket 232 has several fourth suction bag tubes 234. The third and fourth suction bag tubes 233 and 234 are symmetrically distributed. One end of each third and fourth suction bag tube 233 or tube 234 is connected to a second suction cup 235, and the other end is connected to a second air nozzle 236. The second drive assembly 26 includes a second motor 261, a second sliding frame 262, a first lead screw 263, a third support slider 264, and a fourth support slider 265. The fourth bracket slider 265 is slidably engaged with the second sliding frame 262. The first lead screw 263 is linked with the output end of the second motor 261. The third bracket slider 264 and the fourth bracket slider 265 are threadedly connected to the first lead screw 263. The third suction bag bracket 231 is linked with the third bracket slider 264, and the fourth suction bag bracket 232 is linked with the fourth bracket slider 265. The operation of the second motor 261 drives the first lead screw 263 to rotate. The third bracket slider 264 and the fourth bracket slider 265 slide relative to or towards each other along the axis of the second sliding frame 262, causing the second suction cup 235 to contact the lower outer surface of the packaging bag and open the bag cavity.

[0039] like Figure 6As shown, the bag-tightening assembly 24 includes a third sliding frame 241 and a fourth sliding frame 242. The third sliding frame 241 is provided with a plurality of first left-hand bag clamping parts 2411, and the fourth sliding frame 242 is provided with a plurality of second left-hand bag clamping parts 2421 corresponding to the first left-hand bag clamping parts 2411. The third sliding frame 241 is slidably fitted with a plurality of fifth-hand support sliders 243. One end face of each fifth-hand support slider 243 is provided with a plurality of first-hand limiting rods 2431 spaced apart, and the other end is connected to a first-hand support slide plate 2432. The first-hand support slide plate 2432 is provided with a plurality of first right-hand bag clamping parts 2433. The fourth sliding frame 242 is slidably fitted with a plurality of sixth-hand support sliders 244. One end face of each sixth-hand support slider 244 is provided with a plurality of second-hand limiting rods 2441 spaced apart, and the other end is connected to a second-hand support slide plate 2442. The second-hand support slide plate 2442 is provided with a plurality of second right-hand bag clamping parts 2443. The third drive assembly 27 includes a first drive shaft 271, a first drive connecting arm 272, and a first drive... The first drive connecting arm 272 is connected at one end to the first drive shaft 271 and at the other end to the first drive rod 273. A first limiting rod 2431 forms a first limiting groove 2434, and a second limiting rod 2441 forms a second limiting groove 2444. The first drive rod 273 passes through the first limiting groove 2434 and the second limiting groove 2444. A first drive plate 274 is provided at the end of the first drive shaft 271 away from the first drive connecting arm 272. 4. A first transmission rack 275 is provided. The rotation of the first drive shaft 271 drives the first drive rod 273 to rotate around the central axis of the first drive shaft 271, causing the fifth bracket slider 243 to move along the axis of the third sliding frame 241 and the sixth bracket slider 244 to move along the axis of the fourth sliding frame 242, causing the first left clamping bag piece 2411 to move relative to or towards the first right clamping bag piece 2433, the second left clamping bag piece 2421, and the second right clamping bag piece 2443, thereby opening the bag opening.

[0040] like Figure 7 As shown, the bag blowing mechanism 4 includes several sets of first clamping cylinders 41, several sets of second clamping cylinders 42, and a bag blowing assembly 43. The first clamping cylinders 41 and the second clamping cylinders 42 are symmetrically distributed. The output end of the first clamping cylinder 41 is provided with an arc-shaped first clamping plate 411, and the output end of the second clamping cylinder 42 is provided with an arc-shaped second clamping plate 421. The first clamping plate 411 and the second clamping plate 421 are closed to form a bag blowing opening 44 that accommodates the bag opening. The bag blowing assembly 43 includes a bag blowing bracket 431 and several sets of bag blowing rods 432. The bag blowing rods 432 are coaxially distributed with the bag blowing opening 44. One end of the bag blowing rod 432 near the bag blowing opening 44 is provided with a bag blowing nozzle 433, and the other end is provided with a bag blowing air nozzle 434. A bag blowing detection mechanism 45 is also provided below the bag blowing mechanism 4.

[0041] The blow-bag testing mechanism 45 includes a testing bracket 451, a first testing support plate 452, and a second testing support plate 453. The first testing support plate 452 and the second testing support plate 453 are spaced apart on the testing bracket 451, forming a testing groove 454. A plurality of first testing elements 455 are spaced apart on the first testing support plate 452, and a plurality of second testing elements 456 are spaced apart on the second testing support plate 453. The first testing elements 455 and the second testing elements 456 are symmetrically distributed on both sides of the testing groove 454.

[0042] like Figure 8 As shown, the bag-pulling mechanism 3 includes a fourth drive assembly 31, a fifth sliding frame 32, and a sixth sliding frame 33. The fifth sliding frame 32 is provided with several third left bag clamping parts 321, and the sixth sliding frame 33 is provided with several fourth left bag clamping parts 331 corresponding to the third left bag clamping parts 321. Several fifth support sliders 322 are slidably engaged with the fifth sliding frame 322. Several third limiting rods 323 are distributed at intervals on one end face of the fifth support sliders 322, and the other end is connected to a third support slide plate 324. Several sets of third right bag clamping parts 325 are provided on the third support slide plate 324. Several sixth support sliders 332 are slidably engaged with the sixth sliding frame 332. Several fourth limiting rods 333 are distributed at intervals on one end face of the sixth support sliders 332, and the other end is connected to a fourth support slide plate 334. Several sets of fourth right bag clamping parts 335 are provided on the fourth support slide plate 334. The fourth drive assembly 31 includes a second drive shaft 311, a second drive connecting arm 312, and a second drive... The rod 313, the second drive connecting arm 312 is connected at one end to the second drive shaft 311 and fixedly connected at the other end to the second drive rod 313, the third limiting rod 323 forms the third limiting groove 326, the fourth limiting rod 333 forms the fourth limiting groove 336, the second drive rod 313 passes into the third limiting groove 326 and the fourth limiting groove 336, the second drive shaft 311 is provided with a second drive plate 314 at the end away from the second drive connecting arm 312, the second drive plate 314 is provided with a second transmission rack 315, the rotation of the second drive shaft 311 drives the second drive rod 313 to rotate around the central axis of the second drive shaft 311, causing the fifth bracket slider 322 to move along the axis of the fifth sliding frame 32 and the sixth bracket slider 332 to move along the axis of the sixth sliding frame 33, causing the third left bag clamp 321 and the third right bag clamp 325, the fourth left bag clamp 331 and the fourth right bag clamp 335 to move relative to or towards each other, thereby flattening the bag opening of the packaging bag.

[0043] The working principle of this embodiment is as follows: First, the bag clamping drive 11 drives the rotating frame 12 to rotate around the connecting shaft via the drive connecting rod, thereby causing the first clamping plate 13 to move laterally. At the same time, the bag clamping rotating shaft 151 rotates, synchronously driving the first connecting plate 152 and the second connecting plate 153 to move towards each other along the axis of the rotating shaft, so that the first clamping plate 13 and the second clamping plate 14 can achieve precise closure and clamp the outer surface of the packaging bag. Then, the bag clamping drive 11 drives the rotating frame 12 to rotate around the center of the connecting shaft, causing the first clamping plate 13 and the second clamping plate 14 to move laterally and move the packaging bag into the bag opening mechanism 2.

[0044] Subsequently, the first motor of the upper suction bag assembly 22 drives the first support slider 253 and the second support slider 254 to slide synchronously in opposite directions along the first sliding frame 252, causing the symmetrically distributed first suction cups 225 to adsorb the upper edge of the bag opening. The second motor 261 of the lower suction bag assembly 23 drives the third support slider 264 and the fourth support slider 265 to move synchronously in opposite directions through the first lead screw 263, causing the second suction cup 235 to adsorb the lower edge of the bag opening. At the same time, the bag clamping drive component 11 drives the first clamping plate 13 and the second clamping plate 14 to separate, and the bag clamping drive component 11 resets, ready for the next bag clamping and transfer.

[0045] Then, the first sliding frame 252 drives the first support slider 253 and the second support slider 254 to move relative to each other. The first suction cup 225 and the second suction cup 235 pull open the packaging bag body. Then, the first drive shaft 271 rotates, and the first drive rod 273 rotates around the central axis of the first drive shaft 271, driving the first left bag clamping component 2411 and the first right bag clamping component 2433, the second left bag clamping component 2421 and the second right bag clamping component 2443 to move towards each other, opening the packaging bag mouth. Then, the bag clamping mechanism 1 clamps the packaging bag again and transfers it to the bag blowing mechanism 4.

[0046] The first clamping cylinder 41 and the second clamping cylinder 42 clamp the first clamping plate 13 and the second clamping plate 14 simultaneously. The first bag clamping plate 411 and the second bag clamping plate 421 abut against the two sides of the bag opening. At the same time, the blowing nozzle 433 naturally penetrates the bag opening, and then the gas is blown into the bag body through the blowing nozzle 433, so that the inner wall of the bag is completely separated. Meanwhile, the blowing detection mechanism 45 performs real-time monitoring. The first detection element 455 and the second detection element 456 are symmetrically distributed on both sides of the detection groove 454 to detect the opening status and filling degree of the bag opening in a non-contact manner to ensure that the filling conditions are met.

[0047] Then, the bag clamping mechanism 1 transfers the opened packaging bag to the unloading station. After filling, the bag clamping mechanism 1 transfers the packaging bag to the bag pulling mechanism 3 again.

[0048] The third left bag clamping member 321 and the fourth left bag clamping member 331, the third right bag clamping member 325 and the fourth right bag clamping member 335 of the bag pulling mechanism 3 synchronously clamp the side of the packaging bag under the action of the fourth drive assembly 31. Then, the second drive shaft 311 drives the second drive rod 313 to rotate around the central axis of the second drive shaft 311, so as to smoothly pull the bag opening after filling flat and tighten it.

[0049] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A bag-opening and bag-pulling device, characterized in that: It includes a bag clamping mechanism, a bag opening mechanism, and a bag pulling mechanism. A material unloading station is provided between the bag opening mechanism and the bag pulling mechanism. A bag blowing mechanism is also provided between the bag opening mechanism and the material unloading station. The bag opening mechanism is used to open the bag opening of the packaging bag. The bag blowing mechanism can blow the bag into the packaging bag and shrink the two ends of the packaging bag inward. The bag pulling mechanism is used to tighten the bag opening of the packaging bag.

2. The bag opening and pulling device according to claim 1, characterized in that: The bag opening mechanism includes a bag opening frame, an upper suction bag assembly, a lower suction bag assembly, a bag closing assembly, a first drive assembly, a second drive assembly, and a third drive assembly. The upper suction bag assembly and the lower suction bag assembly are vertically coaxially distributed on the bag opening frame. The first drive assembly can drive the upper suction bag assembly to open and close back and forth, the second drive assembly can drive the lower suction bag assembly to open and close back and forth, and the third drive assembly can drive the bag closing assembly to open and close left and right.

3. The bag opening and pulling device according to claim 2, characterized in that: The upper suction bag assembly includes a first suction bag bracket and a second suction bag bracket. The first driving assembly includes a first motor, a first sliding frame, a first bracket slider, and a second bracket slider. The first suction bag bracket is linked with the first bracket slider, and the second suction bag bracket is linked with the second bracket slider. The first suction bag bracket is provided with a plurality of first suction bag tubes, and the second suction bag bracket is provided with a plurality of second suction bag tubes. The first and second suction bag tubes are symmetrically distributed. A plurality of first suction cups are passed through one end of each of the first and second suction bag tubes, and the other end is connected to a first air nozzle. The operation of the first motor drives the first and second bracket sliders to slide relative to or towards each other along the axis of the first sliding frame, causing the first suction cups to contact the upper outer surface of the packaging bag and open the bag opening.

4. The bag opening and pulling device according to claim 3, characterized in that: The lower suction bag assembly includes a third suction bag bracket and a fourth suction bag bracket. The third suction bag bracket is provided with a plurality of third suction bag tubes, and the fourth suction bag bracket is provided with a plurality of fourth suction bag tubes. The third and fourth suction bag tubes are symmetrically distributed. A second suction cup is passed through one end of each third and fourth suction bag tube, and a second air nozzle is connected to the other end. The second drive assembly includes a second motor, a second sliding frame, a first lead screw, a third support slider, and a fourth support slider. The third and fourth support sliders are slidably engaged with the second sliding frame. The first lead screw is linked with the output end of the second motor. The third and fourth support sliders are threadedly connected to the first lead screw. The third suction bag bracket is linked with the third support slider, and the fourth suction bag bracket is linked with the fourth support slider. The operation of the second motor drives the first lead screw to rotate. The third and fourth support sliders slide relative to or towards each other along the axis of the second sliding frame, causing the second suction cup to contact the lower outer surface of the packaging bag and open the bag cavity.

5. The bag opening and pulling device according to claim 4, characterized in that: The bag-tightening assembly includes a third sliding frame and a fourth sliding frame. The third sliding frame has several first left-side bag clamping parts, and the fourth sliding frame has several second left-side bag clamping parts corresponding to the first bag clamping parts. The third sliding frame is slidably fitted with several fifth-side support sliders. One end face of each fifth-side support slider has several first-side limiting rods spaced apart, and the other end is connected to a first-side support slide plate. The first-side support slide plate has several sets of first right-side bag clamping parts. The fourth sliding frame is slidably fitted with several sixth-side support sliders. One end face of each sixth-side support slider has several second-side limiting rods spaced apart, and the other end is connected to a second-side support slide plate. The second-side support slide plate has several sets of second right-side bag clamping parts. The third drive assembly includes a first drive shaft and a first drive connecting arm. The first drive rod has one end connected to the first drive shaft and the other end fixedly connected to the first drive rod. The first limiting rod forms a first limiting groove and the second limiting rod forms a second limiting groove. The first drive rod passes through the first limiting groove and the second limiting groove. The first drive shaft has a first drive plate at the end away from the first drive connecting arm. The first drive plate has a first transmission rack. The rotation of the first drive shaft drives the first drive rod to rotate around the central axis of the first drive shaft, causing the fifth bracket slider to move along the axis of the third sliding frame and the sixth bracket slider to move along the axis of the fourth sliding frame, causing the first left bag clamping piece and the first right bag clamping piece, the second left bag clamping piece, and the second right bag clamping piece to move relative to or towards each other, thereby opening the bag opening.

6. A bag-opening and bag-pulling device according to any one of claims 1 to 5, characterized in that: The bag clamping mechanism includes a bag clamping drive, a rotating frame, a first clamping plate, a second clamping plate, and several sets of bag clamping opening and closing assemblies. Several first bag pressing components are spaced apart on the first clamping plate, and several second bag pressing components are spaced apart on the second clamping plate. The bag clamping drive is equipped with a bag clamping slide plate, which is connected to the rotating frame via a drive connecting rod. The first clamping plate is linked to the rotating frame, and the second clamping plate is linked to the first clamping plate via the bag clamping opening and closing assemblies. The operation of the bag clamping drive drives the rotating frame to rotate around the connecting shaft, causing the first and second clamping plates to move laterally. The bag clamping opening and closing assemblies can drive the first and second clamping plates to move relative to or towards each other, causing the first and second bag pressing components to contact or separate from the outer surface of the packaging bag.

7. A bag-opening and bag-pulling device according to claim 6, characterized in that: The bag clamping opening and closing assembly includes a bag clamping shaft, a first connecting plate, a second connecting plate, and a limiting arm. One end of the bag clamping shaft is provided with a driving connecting plate, and the other end is threadedly connected to the first connecting plate. The second connecting plate is threadedly connected to the middle of the bag clamping shaft. The first clamping plate is linked with the first connecting plate, and the second clamping plate is linked with the second connecting plate. The rotation of the bag clamping shaft drives the first connecting plate and the second connecting plate to move relative to or towards each other, causing the first clamping plate and the second clamping plate to open and close.

8. The bag opening and pulling device according to claim 7, characterized in that: The bag blowing mechanism includes several sets of first clamping cylinders, several sets of second clamping cylinders, and a bag blowing assembly. The first clamping cylinders and second clamping cylinders are symmetrically distributed. The output end of the first clamping cylinder is provided with an arc-shaped first clamping plate, and the output end of the second clamping cylinder is provided with an arc-shaped second clamping plate. The first clamping plate and the second clamping plate are closed to form a bag blowing opening that accommodates the bag opening. The bag blowing assembly includes a bag blowing bracket and several sets of bag blowing rods. The bag blowing rods are coaxially distributed with the bag blowing opening. One end of the bag blowing rod near the bag blowing opening is provided with a bag blowing nozzle, and the other end is provided with a bag blowing air nozzle. A bag blowing detection mechanism is also provided below the bag blowing mechanism.

9. A bag-opening and bag-pulling device according to claim 8, characterized in that: The blow-bag testing mechanism includes a testing bracket, a first testing support plate, and a second testing support plate. The first and second testing support plates are spaced apart on the first testing bracket and form a testing groove. A plurality of first testing elements are spaced apart on the first testing support plate, and a plurality of second testing elements are spaced apart on the second testing support plate. The first and second testing elements are symmetrically distributed on both sides of the testing groove.

10. A bag-opening and bag-pulling device according to claim 9, characterized in that: The bag-pulling mechanism includes a fourth drive assembly, a fifth sliding frame, and a sixth sliding frame. The fifth sliding frame has several third left bag-clamping components, and the sixth sliding frame has several fourth left bag-clamping components corresponding to the third bag-clamping components. Several fifth support sliders are slidably fitted onto the fifth sliding frame. Several third limiting rods are spaced apart on one end face of each fifth support slider, and the other end is connected to a third support slide plate. Several sets of third right bag-clamping components are provided on the third support slide plate. Several sixth support sliders are slidably fitted onto the sixth sliding frame. Several fourth limiting rods are spaced apart on one end face of each sixth support slider, and the other end is connected to a fourth support slide plate. Several sets of fourth right bag-clamping components are provided on the fourth support slide plate. The fourth drive assembly includes a second drive shaft and a second drive connector. The package includes a connecting arm and a second drive rod. One end of the second drive connecting arm is connected to the second drive shaft, and the other end is fixedly connected to the second drive rod. The third limiting rod forms a third limiting groove, and the fourth limiting rod forms a fourth limiting groove. The second drive rod passes through the third limiting groove and the fourth limiting groove. The end of the second drive shaft away from the second drive connecting arm is provided with a second drive plate. The second drive plate is provided with a second transmission rack. The rotation of the second drive shaft drives the second drive rod to rotate around the central axis of the second drive shaft, causing the fifth bracket slider to move along the axis of the fifth sliding frame and the sixth bracket slider to move along the axis of the sixth sliding frame. This causes the third left bag clamping component and the third right bag clamping component, the fourth left bag clamping component, and the fourth right bag clamping component to move relative to or towards each other, thereby flattening the bag opening of the packaging bag.

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