Bag opening device and bagging machine

Abstract

The utility model provides a bag opening device and a bagging machine, the bag opening device comprises a rack, a feeding assembly and a bag opening assembly, the feeding assembly and the bag opening assembly are installed on the rack, the bag opening assembly comprises a first limiting component, a heat sealing component, a cutting component, a second limiting component and a bag opening component, and the first limiting component, the heat sealing component, the cutting component, the second limiting component and the bag opening component are sequentially arranged on the rack in the conveying direction; the first limiting component and the second limiting component are located on the two sides of the heat sealing component and the cutting component in the conveying direction. After the end of a packaging bag film from the feeding assembly enters the bag opening assembly, the first limiting component and the second limiting component limit the two ends of the packaging bag film in the conveying direction, so that the position of the packaging bag film cannot deviate, the opening end of a packaging bag can accurately enter the bag opening component, and the packaging bag film can be conveniently opened. The purpose of reliably opening the bag opening of the packaging bag through the bag opening component is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of packaging equipment technology, specifically relating to a bag opening device and a bag-packing machine. Background Technology

[0002] A bag opening device is a specialized piece of equipment in industrial automation used to automatically open packaging bags. It can significantly improve the efficiency of packaging and filling production lines and reduce manual intervention. Its core workflow involves identifying the bag opening through vision or mechanical positioning, then using a robotic arm or suction cup to grasp it, and finally using a mechanical structure to open the bag opening, preparing it for subsequent filling and sealing.

[0003] Taking the installation of a bag-opening device on a bag-packing machine as an example, a bag-packing machine is an industrial automation device mainly used for bag-packing and bag-sorting operations in the packaging process, and is commonly found in the packaging industry. By integrating mechanical, electronic, and control technologies, bag-packing machines automate the processes of bag supply, opening, bagging, and sealing, thereby improving packaging efficiency and consistency.

[0004] The bag opening device of a bagging machine is its core functional module, mainly used to automatically open the bag opening for subsequent filling. However, in the existing bag opening devices of bagging machines, after the feeding mechanism conveys the bag film into the opening mechanism, the bag film is in a free position. During the simultaneous heat sealing and cutting process, the heat sealing or cutting components may cause the bag film to shift, resulting in a shift in the position of the cut bag. Consequently, the bag opening may shift, making it impossible to open the bag. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in the prior art, when the bag opening device is in use, the position of the bag film is free. During the heat sealing and cutting process, the position of the bag film may be shifted, resulting in the position of the cut bag being shifted, and thus the position of the bag opening being shifted, making it impossible to open the bag.

[0006] To solve the above problems, this utility model provides a bag opening device, including a frame, and a feeding component and a bag opening component installed on the frame; wherein, in the conveying direction of the packaging bag film, the feeding component is located upstream of the bag opening component, and feeds the packaging bag film to the bag opening component.

[0007] The bag opening assembly includes a first limiting component, a heat sealing component, a cutting component, a second limiting component, and a bag opening component, which are sequentially arranged on the frame along the conveying direction; wherein, the first limiting component and the second limiting component are located on both sides of the heat sealing component and the cutting component in the conveying direction, and the heat sealing component and the cutting component are respectively movably arranged on both sides of the packaging bag film.

[0008] Furthermore, the end of the packaging bag film from the feeding component enters the bag opening component. The first limiting component and the second limiting component limit the end of the packaging bag film. The heat sealing component moves toward the packaging bag film and heat seals the corresponding part of the end of the packaging bag film. The cutting head of the cutting component moves toward the packaging bag film and cuts the corresponding part of the end of the packaging bag film to form the closed end of the packaging bag. The packaging bag film continues to be conveyed until the open end of the packaging bag enters the bag opening component and is opened by the bag opening component.

[0009] Using the above technical solution, when this bag opening device is in use, since the first limiting component and the second limiting component are located on both sides of the heat sealing component and the cutting component in the conveying direction, when the end of the packaging bag film from the feeding component enters the bag opening component, the first limiting component and the second limiting component limit both ends of the packaging bag film in the conveying direction, ensuring that the position of the packaging bag film will not shift. Then, the heat sealing component moves toward the packaging bag film to heat seal the corresponding part of the end of the packaging bag film, and the cutting head of the cutting component moves toward the packaging bag film to cut the corresponding part of the end of the packaging bag film to form the closed end of the packaging bag. After this, the position of the packaging bag will not shift, thereby avoiding the shift of the bag opening position.

[0010] Furthermore, after the heat-sealing and cutting components have finished heat-sealing and cutting the packaging bag film, when the heat-sealing and cutting components move away from the packaging bag film, the ends of the packaging bag film are limited by the first and second limiting components, so that the packaging bag film will not be moved by the heat-sealing or cutting components and thus will not be displaced. Then, the first and second limiting components release the finished packaging bag, so that the open end of the packaging bag accurately enters the opening component, thereby achieving the purpose of reliably opening the packaging bag opening by the opening component.

[0011] In summary, this bag opening device, when opening the bag, limits the end of the packaging bag film through the first and second limiting components, thus preventing the packaging bag film from shifting position. This allows the opening end of the packaging bag to accurately enter the bag opening component, achieving the purpose of reliably opening the packaging bag.

[0012] Furthermore, an embodiment of the present invention also discloses a bag opening device, wherein the first limiting component includes a first limiting end extending along the width direction of the packaging bag, and the second limiting component includes a second limiting end extending along the width direction.

[0013] In this process, the end of the packaging bag film from the feeding component enters the bag opening component, and the first limiting end and the second limiting end synchronously limit the corresponding parts of the end of the packaging bag film; and the first limiting end and the second limiting end are aligned and arranged at intervals in the conveying direction.

[0014] Using the above technical solution, when this bag opening device is in use, after the end of the packaging bag film from the feeding component enters the bag opening component, the first limiting end and the second limiting end simultaneously limit the corresponding parts of the end of the packaging bag film, thereby limiting both ends of the packaging bag film in the conveying direction at the same time. This avoids the risk that the position of the heat-sealed part and the cutting part on the packaging bag film will be offset because one end of the packaging bag film is limited while the other end continues to be conveyed.

[0015] In addition, the first limiting end and the second limiting end are aligned and arranged at intervals in the conveying direction, so that the two ends of the packaging bag film are aligned in the conveying direction. This ensures that after the packaging bag film is heat-sealed and cut to form individual packaging bags, when the packaging bag is conveyed into the bag opening component in the conveying direction, the positions of the opening end and the closed end of the packaging bag do not shift from each other, so that the bag opening component can accurately open the bag opening.

[0016] Furthermore, an embodiment of the present invention also discloses a bag opening device, wherein the first limiting component includes a first fixing part and a first moving part, wherein the first fixing part is disposed on the frame extending in the width direction and one side surface is disposed downstream of the outlet end of the feeding assembly extending in the conveying direction; the first moving part is disposed on one side of the first fixing part in a vertical direction perpendicular to the width direction, and one side end can abut against one side surface of the first fixing part; and one side end of the first moving part abuts against one side surface of the first fixing part to form a first limiting end.

[0017] The second limiting component includes a second fixing part and a second moving part. The second fixing part is provided on the frame extending in the width direction, and one side surface is provided downstream of the exit end of the cutting component extending in the conveying direction. The second moving part is provided on one side of the second fixing part that can move in the vertical direction, and one side end can abut against one side surface of the second fixing part. Furthermore, one side end of the second moving part abuts against one side surface of the second fixing part to form a second limiting end. The vertical direction, the width direction, and the conveying direction are perpendicular to each other.

[0018] Using the above technical solution, when this bag opening device is in use, one side surface of the second fixing part extends along the conveying direction and is located downstream of the outlet end of the cutting component. This allows the first moving part to move vertically toward the first fixing part after the end of the packaging bag film from the feeding assembly enters the bag opening assembly, thereby limiting and adhering one end of the packaging bag film to one side surface of the first fixing part. Simultaneously, the second moving part moves vertically toward the second fixing part, limiting and adhering the other end of the packaging bag film to one side surface of the first fixing part. During this process, since one side surface of the first fixing part extends along the conveying direction and is located downstream of the outlet end of the feeding assembly, and one side surface of the second fixing part extends along the conveying direction and is located downstream of the outlet end of the cutting component, the contact area between both ends of the packaging bag film and the first and second fixing parts is increased, further preventing the packaging bag film from shifting position.

[0019] Furthermore, the present invention also discloses a bag opening device, wherein the first fixing part and the second fixing part are aligned in the conveying direction and integrally form the fixing part, the first limiting end and the second limiting end are located on the same side of the fixing part in the conveying direction; and the heat sealing component and the cutting component are located on opposite sides of the fixing part in the conveying direction.

[0020] By adopting the above technical solution, the first fixing part and the second fixing part are aligned in the conveying direction and integrally formed to form the fixing part. When the end of the packaging bag film from the feeding component enters the bag opening component, it is limited by the first limiting end and the second limiting end, so that the packaging bag film can adhere to one side surface of the fixing part. When the heat sealing component moves towards the packaging bag film to heat seal the corresponding part of the packaging bag film, the fixing part can limit the heat sealing end of the heat sealing component, so that the heat sealing end of the heat sealing component abuts against one side surface of the fixing part to heat seal the corresponding part of the packaging bag film. In this process, since the packaging bag film will not shift in the vertical direction, and the heat sealing end of the heat sealing component abuts against the fixing part to heat seal, the corresponding part of the packaging bag film can be accurately heat sealed, and the heat sealing effect is better.

[0021] Furthermore, by limiting the heat-sealing end of the heat-sealing component through the fixing part, the cutting head of the cutting component can also be limited by the fixing part, so that the cutting head of the cutting component abuts against one side surface of the fixing part to cut the corresponding part of the packaging bag film; during this process, since the position of the packaging bag film in the vertical direction will not shift, it is convenient for the cutting head of the cutting component to cut the packaging bag film.

[0022] Furthermore, since the heat-sealing component and the cutting component are located on opposite sides of the fixed part in the conveying direction, the positions of the heat-sealing component and the cutting component can be reasonably arranged in the conveying direction, reducing the space occupied by the heat-sealing component and the cutting component in the conveying direction, making the structure of this bag opening device more compact.

[0023] Furthermore, the present invention also discloses a bag opening device, wherein in the conveying direction, the heat sealing component is located on the same side of the fixing part as the first limiting end and the second limiting end, and the heat sealing component includes a heat sealing head that can move vertically toward the fixing part. The heat sealing head can move vertically and together with the corresponding part of the fixing part, clamps the corresponding part of the end of the packaging bag film to perform heat sealing.

[0024] Furthermore, in the conveying direction, the cutting component is located on the other side of the fixing part, and the cutting head of the cutting component can move toward the fixing part in the vertical direction. The fixing part has a strip-shaped opening that extends in the width direction, and the strip-shaped opening is directly opposite the cutting head in the vertical direction. The cutting head moves in the vertical direction and passes through the fixing part through the strip-shaped opening to cut the corresponding part of the end of the packaging bag film.

[0025] By adopting the above technical solution, since the heat-sealing component and the first and second limiting ends are located on the same side of the fixing part in the conveying direction, while the cutting component is located on the other side of the fixing part, after the first and second limiting ends limit and adhere the packaging bag film to one side surface of the fixing part, the packaging bag film is limited by the first and second limiting ends. Therefore, the cutting head can move vertically and pass through the fixing part through the strip opening to cut the corresponding part of the end of the packaging bag film, so that the cutting head does not contact the fixing part, thereby avoiding the risk of the cutting head being damaged during long-term use.

[0026] Furthermore, the present invention also discloses a bag opening device, which further includes a third limiting component disposed on the frame. In the conveying direction, the third limiting component is located between the heat sealing component and the cutting component. The third limiting component includes a third moving part, and the third moving part is movably disposed on one side of the fixed part in the vertical direction. One side end of the third moving part can abut against one side surface of the fixed part, and one side end of the third moving part abuts against one side surface of the fixed part to form a third limiting end.

[0027] Furthermore, the third limiting end, together with the first and second limiting ends, simultaneously limits the corresponding parts of the end of the packaging bag film.

[0028] Using the above technical solution, during the heat-sealing process of the heat-sealing head of the heat-sealing component, the corresponding parts of the packaging bag film soften. At this time, when the cutting head moves vertically and cuts the corresponding cutting parts of the packaging bag film through the strip-shaped opening, the softened parts of the packaging bag film may tear due to the cutting head. Therefore, by setting a third limiting component, when the end of the packaging bag film from the feeding component enters the bag opening component, the third limiting end, along with the first and second limiting ends, synchronously limits the corresponding parts of the end of the packaging bag film. Since the third limiting end is located between the heat-sealing component and the cutting component in the conveying direction, and the softened part of the packaging bag film is located upstream of the third limiting end in the conveying direction, the risk of tearing due to the softened parts of the packaging bag film caused by the cutting head is avoided by limiting the corresponding parts of the packaging bag film with the third limiting end.

[0029] Furthermore, an embodiment of this utility model also discloses a bag-opening device. The first moving part includes a first telescopic cylinder mounted on the frame and whose driving end can move in the vertical direction, and a first pressure plate that is induced to the driving end of the first telescopic cylinder and extends in the width direction; the second moving part includes a second telescopic cylinder mounted on the frame and whose driving end can move in the vertical direction, and a second pressure plate that is induced to the driving end of the second telescopic cylinder and extends in the width direction; the third moving part includes a third telescopic cylinder mounted on the frame and whose driving end can move in the vertical direction, and a third pressure plate that is induced to the driving end of the third telescopic cylinder and extends in the width direction.

[0030] Furthermore, in the vertical direction, the first pressure plate has a first rubber strip extending in the width direction protruding on the side near the fixing part, the second pressure plate has a second rubber strip extending in the width direction protruding on the side near the fixing part, and the third pressure plate has a third rubber strip extending in the width direction protruding on the side near the fixing part.

[0031] By adopting the above technical solution, by extending the first pressure plate, the second pressure plate, and the third pressure plate along the width direction, the contact area between the first limiting end, the second limiting end, and the third limiting end and the corresponding part of the packaging bag film can be increased, thereby further improving the limiting strength of the packaging bag film and ensuring that the position of the packaging bag film will not shift when it is heat-sealed and cut.

[0032] Furthermore, when the first, second, and third pressure plates press the corresponding parts of the packaging bag film tightly against one side surface of the fixing part, the packaging bag film is less likely to be damaged due to the contact between the first, second, and third rubber strips and the corresponding parts of the packaging bag film, thereby reducing the risk of damage to the packaging bag film.

[0033] Furthermore, the present invention also discloses a bag opening device, wherein the fixing part includes a fixing plate that is fixedly connected to the frame at both ends in the width direction and extends along the conveying direction, and a heating component that is fixedly embedded inside the fixing plate.

[0034] In the vertical direction, the fixing plate has an installation groove extending in the width direction on the side near the heat sealing component. A fourth rubber strip that matches the installation groove is fixedly embedded in the installation groove, and the fourth rubber strip is directly opposite the heat sealing head in the vertical direction.

[0035] By adopting the above technical solution, the fixing plate is heated by the heating component. When the end of the packaging bag film from the feeding component enters the bag opening component, the corresponding part of the packaging bag film is pressed and adhered to one side surface of the fixing plate by the first pressure plate, the second pressure plate, and the third pressure plate. The fixing plate can preheat the packaging bag film. Then, when the heat sealing head of the heat sealing component performs heat sealing, the risk of poor heat sealing caused by the large temperature difference between the two sides of the packaging bag film in the vertical direction is reduced.

[0036] In addition, by setting a fourth rubber strip, the friction between the heat-sealing position of the packaging bag film and the fourth rubber strip is increased. When the heat-sealing head presses the corresponding part of the packaging bag film for heat sealing, the risk of the heat-sealing part of the packaging bag film softening and deforming along the conveying direction, thus causing poor heat sealing, is reduced.

[0037] Furthermore, an embodiment of this utility model also discloses a bag opening device. The feeding assembly includes a first feeding roller and a second feeding roller arranged opposite to each other in a vertical direction, a connecting frame slidably connected to the frame in a vertical direction, a first driving member mounted on the frame and whose driving end is drivenly connected to the connecting frame, and a second driving member mounted on the frame and whose driving end is drivenly connected to the second feeding roller.

[0038] In the width direction, the two ends of the first feeding roller are rotatably connected to the connecting frame, and the two ends of the second feeding roller are rotatably connected to the machine frame. The first driving component is used to drive the connecting frame to move in the vertical direction and to move the first feeding roller in the vertical direction in conjunction with it. The second driving component is used to drive the second feeding roller to rotate around the width direction.

[0039] Using the above technical solution, when conveying the packaging bag film, the packaging bag film is placed between the first feeding roller and the second feeding roller. Then, the first driving component drives the connecting frame to move vertically and moves the first feeding roller vertically closer to the second feeding roller, so that the packaging bag film is clamped by the first feeding roller and the second feeding roller. When it is necessary to convey the packaging bag film into the bag opening assembly along the conveying direction, the second driving component drives the second feeding roller to rotate around the width direction, so that the packaging bag film is conveyed into the bag opening assembly along the conveying direction.

[0040] Furthermore, the first driving component drives the connecting frame to move vertically and moves the first feeding roller away from the second feeding roller, thereby increasing the vertical distance between the first and second feeding rollers, which facilitates the placement of the packaging bag film between them. Additionally, when the thickness of the packaging bag film changes vertically, the first driving component drives the connecting frame to move vertically and moves the first feeding roller in the same direction, thereby adjusting the distance between the first and second feeding rollers to accommodate packaging bag films of different thicknesses.

[0041] Furthermore, an embodiment of the present invention also discloses a bag opening device, wherein the bag opening component includes multiple pairs of clamping members spaced apart on the frame along the width direction, and two clamping members in each pair of clamping members are arranged opposite to each other in the vertical direction.

[0042] Each clamping component includes a clamping drive component mounted on the frame and whose drive end can move vertically, and a clamping part connected to the drive end of the clamping drive component. The clamping drive component drives the clamping part to move vertically and clamp the corresponding side of the periphery of the inlet end of the packaging bag.

[0043] By adopting the above technical solution, when opening the bag, the clamping part is driven by the clamping drive component of each clamping member to move vertically toward the entrance end of the packaging bag. Then, the clamping part clamps the corresponding side of the periphery of the entrance end of the packaging bag. The clamping drive component of each clamping member drives the clamping part to move vertically toward the entrance end of the packaging bag, thereby facilitating the opening of the packaging bag. Furthermore, during this process, when opening the packaging bag, the clamping method limits and holds the corresponding side of the packaging bag, thereby reducing the risk of the packaging bag falling off during the opening process.

[0044] Furthermore, an embodiment of this utility model also discloses a bag opening device, wherein the clamping part includes a connecting seat fixedly installed on the driving end of the clamping driving member, and a clamping head movablely installed on the connecting seat along the height direction of the frame; wherein the clamping head includes a pair of movable seats movablely installed on the connecting seat along the height direction of the frame, a pair of finger rollers fixedly installed on the pair of movable seats, and a driving member installed between the pair of movable seats.

[0045] In this configuration, at least one of the two movable seats is slidably connected to the connecting seat, and the driving component drives the two movable seats to move in opposite directions or towards each other, and in conjunction with the corresponding finger rollers to move and clamp the corresponding side of the packaging bag.

[0046] By adopting the above technical solution, the clamping head is configured to include a pair of finger rollers. When the bag is opened, the finger rollers clamp the corresponding side of the bag opening, which can reduce the contact area between the finger rollers and the bag, thereby reducing the risk of damaging the bag when clamping it.

[0047] Furthermore, the present invention also discloses a bag opening device, wherein the bag opening assembly further includes a pair of bag supporting components that are spaced apart on the frame along the width direction and are located on both sides of the bag opening component.

[0048] Each bag-supporting component includes a pair of bag-supporting members mounted on a frame that move vertically, a bag-supporting driving member mounted on the frame and whose driving end can move vertically, and the driving end of the bag-supporting driving member is respectively connected to the corresponding pair of bag-supporting members; each bag-supporting member includes a movable frame slidably connected to the frame vertically, a driving cylinder mounted on the movable frame, and a support plate with one end rotatably connected to the movable frame and the other end being a free end; wherein, the driving end of the driving cylinder is connected to one end of the support plate, and the driving cylinder is used to drive the support plate to swing around the vertical direction.

[0049] Using the above technical solution, after the opening of the packaging bag is opened by the opening component, a pair of bag-supporting components can further expand the opening of the packaging bag and keep the packaging bag in an expanded state, thereby facilitating the subsequent bagging of the packaging bag.

[0050] Furthermore, since each pair of bag-supporting components in each bag-supporting part can move vertically, when the size of the packaging bag changes in the vertical direction, the position of the pair of bag-supporting components in the vertical direction can be changed to accommodate packaging bags of different sizes.

[0051] Furthermore, this utility model also discloses a bagging machine, which includes the aforementioned bag opening device and a conveying device that extends along the conveying direction of the packaging box and is arranged on the frame. The conveying device is provided with a bagging station. In the height direction of the frame, the bag opening device is located above the bagging station. The packaging box is conveyed to the bagging station by the conveying device, and the bag opening device opens the packaging bag.

[0052] Using the above technical solution, when this bagging machine is in use, the conveying device transports the packaging box to the bagging station. Then, the end of the packaging bag film from the feeding component enters the bag opening component. The first limiting component and the second limiting component limit both ends of the packaging bag film in the conveying direction, ensuring that the position of the packaging bag film will not shift. This allows the heat sealing component to move towards the packaging bag film, thereby heat-sealing the corresponding part of the end of the packaging bag film. The cutting head of the cutting component moves towards the packaging bag film, thereby cutting the corresponding part of the end of the packaging bag film to form the closed end of the packaging bag. The position of the resulting packaging bag will not shift, ensuring that the position of the bag opening will also not shift, so that the packaging bag can be accurately placed into the packaging box. Attached Figure Description

[0053] Figure 1 A perspective view of the bag-opening device provided in an embodiment of the present utility model;

[0054] Figure 2 A perspective view of the bag-opening device provided in an embodiment of the present utility model from another angle;

[0055] Figure 3 A perspective view of a portion of the structure of the bag-opening device provided in an embodiment of this utility model;

[0056] Figure 4 This is a front view of a portion of the structure of the bag-opening device provided in an embodiment of the present utility model;

[0057] Figure 5 for Figure 4 Enlarged view of section A;

[0058] Figure 6 A perspective view of another part of the structure of the bag-opening device provided in an embodiment of the present utility model;

[0059] Figure 7 A perspective view of the clamping portion of the clamping member provided in an embodiment of this utility model;

[0060] Figure 8 This is a perspective view of the bag support component provided in an embodiment of the present utility model.

[0061] Explanation of reference numerals in the attached figures:

[0062] 1. Feeding assembly;

[0063] 10. First feeding roller; 11. Second feeding roller; 12. First driving component; 13. Second driving component; 14. Connecting frame;

[0064] 2. Bag opening component;

[0065] 20. First limiting component;

[0066] 200. First moving part; 201. First telescopic cylinder; 202. First pressure plate; 203. First rubber strip;

[0067] 21. Heat-sealed components;

[0068] 210. Heat sealing head; 211. Heat sealing drive cylinder;

[0069] 22. Second limiting component;

[0070] 220. Second moving part; 221. Second telescopic cylinder; 222. Second pressure plate; 223. Second rubber strip;

[0071] 23. Cutting parts;

[0072] 230. Cutting head; 231. Cutting telescopic cylinder;

[0073] 24. Bag opening component;

[0074] 240. Clamping component; 241. Clamping part; 242. Clamping head; 243. Connecting seat; 244. Moving seat; 245. Driving component; 246. Finger roller;

[0075] 25. Third limiting component;

[0076] 250. Third moving part; 251. Third pressure plate; 252. Third rubber strip;

[0077] 26. Fixing part;

[0078] 260. Fixing plate; 261. Heating component; 262. Fourth rubber strip;

[0079] 27. Bag support components;

[0080] 270. Bag support component; 271. Bag support drive component; 272. Drive cylinder; 273. Support plate; 274. Moving frame;

[0081] 3. Rack;

[0082] L: Conveying direction; W: Width direction; H: Vertical direction. Detailed Implementation

[0083] As described in the background art, when the bag opening device of the existing bagging machine is in use, after the feeding mechanism conveys the packaging bag film into the bag opening mechanism, since the position of the packaging bag film is free, during the simultaneous heat sealing and cutting process, the heat sealing component or the cutting component may cause the position of the packaging bag film to shift, thereby causing the position of the cut packaging bag to shift, which in turn causes the position of the bag opening to shift, resulting in the problem that the bag opening cannot be opened.

[0084] To address the aforementioned problems, this utility model provides a bag-opening device, including a frame, and a feeding assembly and a bag-opening assembly mounted on the frame. The feeding assembly is located upstream of the bag-opening assembly in the conveying direction of the packaging bag film, feeding the packaging bag film to the bag-opening assembly. The bag-opening assembly includes a first limiting component, a heat-sealing component, a cutting component, a second limiting component, and the bag-opening assembly, sequentially arranged on the frame along the conveying direction. The first and second limiting components are located on opposite sides of the heat-sealing and cutting components in the conveying direction, and the heat-sealing and cutting components are movably arranged on opposite sides of the packaging bag film. When the end of the packaging bag film from the feeding assembly enters the bag-opening assembly, the first and second limiting components limit both ends of the packaging bag film in the conveying direction, preventing the packaging bag film from shifting position. This allows the open end of the packaging bag to accurately enter the bag-opening assembly, achieving the purpose of reliably opening the packaging bag opening.

[0085] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0086] First, let's introduce the overall structure of the bag-opening device provided in this embodiment.

[0087] like Figure 1 and Figure 2 As shown, this embodiment provides a bag opening device, including a frame 3, and a feeding assembly 1 and a bag opening assembly 2 mounted on the frame 3; wherein, in the conveying direction L of the packaging bag film (see [reference]... Figure 3 On the upper part of the bag opening component 2, the feeding component 1 is located upstream of the bag opening component 2 and is used to feed the packaging bag film to the bag opening component 2.

[0088] Specifically, the bag opening assembly 2 includes a first limiting component 20, a heat sealing component 21, a cutting component 23, a second limiting component 22, and a bag opening component 24, which are sequentially arranged on the frame 3 along the conveying direction L; wherein, the first limiting component 20 and the second limiting component 22 are located on both sides of the heat sealing component 21 and the cutting component 23 in the conveying direction L, and the heat sealing component 21 and the cutting component 23 are respectively movably arranged on both sides of the packaging bag film.

[0089] More specifically, in use, this bag-opening device, because the first limiting component 20 and the second limiting component 22 are located on both sides of the heat-sealing component 21 and the cutting component 23 in the conveying direction L; therefore, when the end of the packaging bag film from the feeding component 1 enters the bag-opening component 2, the first limiting component 20 and the second limiting component 22 limit both ends of the packaging bag film in the conveying direction L, ensuring that the position of the packaging bag film will not shift. Then, the heat-sealing component 21 moves towards the packaging bag film, thereby heat-sealing the corresponding part of the end of the packaging bag film. The cutting head 230 of the cutting component 23 (see...) Figure 3 The material moves toward the packaging bag film, thereby cutting the corresponding part of the packaging bag film to form the closed end of the packaging bag. The position of the resulting packaging bag will not shift, ensuring that the position of the bag opening will also not shift.

[0090] More specifically, after the heat-sealing component 21 and the cutting component 23 have finished heat-sealing and cutting the packaging bag film, when the heat-sealing component 21 and the cutting component 23 move away from the packaging bag film, the end of the packaging bag film is limited by the first limiting component 20 and the second limiting component 22, so that the packaging bag film will not be moved by the heat-sealing component 21 or the cutting component 23 and its position will not be shifted; then the first limiting component 20 and the second limiting component 22 release the finished packaging bag, so that the open end of the packaging bag accurately enters the opening component 24, so that the opening component 24 can reliably open the packaging bag.

[0091] It should be noted that the two ends of the packaging bag film in the conveying direction L refer to: one end of the packaging bag film upstream of the heat sealing component 21 and the other end downstream of the cutting component 23 after the packaging bag film enters the bag opening component 2 in the conveying direction L.

[0092] In summary, when opening the bag, this bag opening device limits the end of the packaging bag film by the first limiting component 20 and the second limiting component 22, so that the position of the packaging bag film will not shift, and thus the opening end of the packaging bag can accurately enter the bag opening component 24, so as to achieve the purpose of reliably opening the packaging bag by the bag opening component 24.

[0093] Furthermore, the following explains how individual packaging bags are formed.

[0094] After one end of the packaging bag film enters the bag opening assembly 2, the packaging bag film is continuously conveyed by the feeding assembly 1 until the end of the packaging bag passes through the heat sealing assembly 21, the cutting assembly 23, and the bag opening assembly 24. At this time, the end of the packaging bag film is located downstream of the bag opening assembly 24 in the conveying direction L and has a preset size of a single packaging bag between it and the bag opening assembly 24. Then, the heat sealing assembly 21 heat seals the packaging bag to form the closed end of the next uncut packaging bag. Then, the cutting assembly 23 cuts the portion below the closed end of the uncut packaging bag to form the open end of the packaging bag that has entered the bag opening assembly 24.

[0095] Furthermore, after cutting and heat sealing, the packaging bag film continues to be conveyed. The packaging bag, which has not yet been cut but has been heat sealed to form a closed end, enters the bag opening component 24 and is then cut again by the cutting component 23, thereby forming a single packaging bag with an open end.

[0096] The structure and arrangement of the first limiting component 20 and the second limiting component 22 will be further explained below.

[0097] Specifically, such as Figure 3 As shown, the first limiting member 20 includes a first limiting end extending along the width direction W of the packaging bag, and the second limiting member 22 includes a second limiting end extending along the width direction W.

[0098] More specifically, the end of the packaging bag film from the feeding component 1 enters the bag opening component 2, and the first limiting end and the second limiting end simultaneously limit the corresponding parts of the end of the packaging bag film; thereby, both ends of the packaging bag film in the conveying direction L are simultaneously limited, thus avoiding the risk that the downstream end of the packaging bag film is limited while the upstream end continues to be conveyed, which would cause the position of the heat-sealed part and the cutting part on the packaging bag film to shift.

[0099] More specifically, the first limiting end and the second limiting end are aligned at intervals in the conveying direction L, so that the two ends of the packaging bag film are aligned in the conveying direction L. This ensures that after the packaging bag film is heat-sealed and cut to form individual packaging bags, when the packaging bag is conveyed into the bag opening component 24 along the conveying direction L, the positions of the opening end and the closed end of the packaging bag will not shift from each other, so that the bag opening component 24 can accurately open the bag opening.

[0100] More specifically, the structure and arrangement of the first limiting component 20 and the second limiting component 22 are not limited, and the following is an example.

[0101] In one implementation, such as Figure 1 and Figure 3As shown, the first limiting component 20 includes a first fixing part and a first moving part 200. The first fixing part is provided on the frame 3 extending along the width direction W, and one side surface is provided downstream of the outlet end of the feeding assembly 1 extending along the conveying direction L. The first moving part 200 is provided on one side of the first fixing part and can be moved along the vertical direction H perpendicular to the width direction W. One side end can abut against one side surface of the first fixing part. Furthermore, one side end of the first moving part 200 abuts against one side surface of the first fixing part to form a first limiting end.

[0102] More specifically, the second limiting member 22 includes a second fixing part and a second moving part 220. The second fixing part is provided on the frame 3 extending in the width direction W, and one side surface is provided downstream of the outlet end of the cutting member 23 extending in the conveying direction L. The second moving part 220 is provided on one side of the second fixing part movable in the vertical direction H, and one side end can abut against one side surface of the second fixing part. Furthermore, one side end of the second moving part 220 abuts against one side surface of the second fixing part to form a second limiting end. The vertical direction H, the width direction W, and the conveying direction L are all perpendicular to each other.

[0103] With the above structure, when this bag opening device is in use, one side surface of the second fixing part extends along the conveying direction L and is disposed downstream of the outlet end of the cutting member 23. This allows the first moving part 200 to move toward the first fixing part along the vertical direction H after the end of the packaging bag film from the feeding assembly 1 enters the bag opening assembly 2. The first moving part 200 then limits and adheres one end of the packaging bag film to one side surface of the first fixing part. Simultaneously, the second moving part 220 moves along the vertical direction H toward the second fixing part, limiting and adhering the other end of the packaging bag film to one side surface of the first fixing part. During this process, since one side surface of the first fixing part extends along the conveying direction L and is disposed downstream of the outlet end of the feeding assembly 1, and one side surface of the second fixing part extends along the conveying direction L and is disposed downstream of the outlet end of the cutting member 23, the contact area between both ends of the packaging bag film and the first and second fixing parts can be increased, further preventing the position of the packaging bag film from shifting.

[0104] Furthermore, in one implementation, such as Figures 3-5As shown, in order to increase the contact area between the packaging bag film and the first fixing part and the second fixing part, and to better limit the packaging bag film, the first fixing part and the second fixing part are aligned in the conveying direction L and integrally form a fixing part 26. When the end of the packaging bag film from the feeding component 1 enters the bag opening component 2, after being limited by the first limiting end and the second limiting end, the packaging bag film can be made to adhere to one side surface of the fixing part 26, thereby increasing the limiting area of ​​the packaging bag film and preventing the middle of the packaging bag film from shaking.

[0105] Specifically, when the heat-sealing component 21 moves toward the packaging bag film to heat-seal the corresponding part of the packaging bag film, the heat-sealing end of the heat-sealing component 21 can be limited by the fixing part 26, so that the heat-sealing end of the heat-sealing component 21 abuts against one side surface of the fixing part 26 to heat-seal the corresponding part of the packaging bag film. During this process, since the position of the packaging bag film in the vertical direction H will not shift, and the heat-sealing end of the heat-sealing component 21 abuts against the fixing part 26 to heat-seal, the corresponding part of the packaging bag film can be accurately heat-sealed, and the heat-sealing effect is better.

[0106] Furthermore, by limiting the heat-sealing end of the heat-sealing component 21 by the fixing part 26, the cutting head 230 of the cutting component 23 can also be limited by the fixing part 26, so that the cutting head 230 of the cutting component 23 abuts against one side surface of the fixing part 26 to cut the corresponding part of the packaging bag film; during this process, since the position of the packaging bag film in the vertical direction H will not shift, it is convenient to cut the packaging bag film by the cutting head 230 of the cutting component 23.

[0107] More specifically, the first limiting end and the second limiting end are located on the same side of the fixing part 26 in the conveying direction L; and the heat sealing component 21 and the cutting component 23 are located on opposite sides of the fixing part 26 in the conveying direction L, so that the positions of the heat sealing component 21 and the cutting component 23 can be reasonably arranged in the conveying direction L, reducing the space occupied by the heat sealing component 21 and the cutting component 23 in the conveying direction L, making the structure of this bag opening device more compact.

[0108] It should be noted that the first fixing part and the second fixing part can also be arranged at intervals along the conveying direction L. In this case, the first fixing part can be set as the first limiting plate and the second fixing part can be set as the second limiting plate. At the same time, a heating component 261 is embedded inside the first limiting plate and the second limiting plate. The heating component 261 can be a heating rod, a heating plate, etc. This embodiment does not limit it to a single type.

[0109] Furthermore, in one implementation, such as Figures 3-5As shown, during the heat sealing process of the heat sealing head 210 of the heat sealing component 21 on the corresponding part of the packaging bag film, the corresponding part of the packaging bag film will soften. At this time, when the cutting head 230 moves along the vertical direction H and cuts the corresponding cutting part of the packaging bag film through the strip opening and the fixing part 26, the corresponding part of the packaging bag film will soften. Therefore, there may be a problem that the cutting head 230 will cause the softened part of the packaging bag film to tear. Therefore, this bag opening device also includes a third limiting component 25 provided on the frame 3.

[0110] Specifically, in the conveying direction L, the third limiting member 25 is located between the heat-sealing member 21 and the cutting member 23. The third limiting member 25 includes a third moving part 250, which is movably disposed on one side of the fixing part 26 in the vertical direction H. One end of the third moving part 250 abuts against one side surface of the fixing part 26, and the abutting end of the third moving part 250 against one side surface of the fixing part 26 forms a third limiting end. Furthermore, the third limiting end, along with the first limiting end and the second limiting end, synchronously limits the corresponding portions of the ends of the packaging bag film.

[0111] More specifically, when the end of the packaging bag film from the feeding component 1 enters the bag opening component 2, the third limiting end, the first limiting end, and the second limiting end simultaneously limit the corresponding parts of the end of the packaging bag film. At this time, since the third limiting end is located between the heat sealing component 21 and the cutting component 23 in the conveying direction L, and the softened part of the packaging bag film in the conveying direction L is located upstream of the third limiting end, the risk of tearing caused by the cutting head 230 driving the softened part of the packaging bag film is avoided after the corresponding parts of the packaging bag film are limited by the third limiting end.

[0112] More specifically, the structure and arrangement of the first moving part 200, the second moving part 220, and the third moving part 250 are not limited, and those skilled in the art can design them according to their own needs. The following is an example.

[0113] In one implementation, such as Figure 4 and Figure 5As shown, the first moving part 200 includes a first telescopic cylinder 201 mounted on the frame 3 and whose drive end is movable in the vertical direction H, and a first pressure plate 202 that is driven by the drive end of the first telescopic cylinder 201 and extends in the width direction W; the second moving part 220 includes a second telescopic cylinder 221 mounted on the frame 3 and whose drive end is movable in the vertical direction H, and a second pressure plate 222 that is driven by the drive end of the second telescopic cylinder 221 and extends in the width direction W. The third moving part 250 includes a third telescopic cylinder mounted on the frame 3 and whose drive end is movable in the vertical direction H, and a third pressure plate 251 that is driven by the drive end of the third telescopic cylinder and extends in the width direction W.

[0114] Specifically, by extending the first pressure plate 202, the second pressure plate 222, and the third pressure plate 251 along the width direction W, the contact area between the first limiting end, the second limiting end, and the third limiting end and the corresponding parts of the packaging bag film can be increased, thereby further enhancing the limiting strength of the packaging bag film and ensuring that the position of the packaging bag film will not shift when it is heat-sealed and cut.

[0115] It should be understood that since the second pressure plate 222 and the third pressure plate 251 are close in the conveying direction, they can share a single drive source. For example, the second telescopic cylinder 221 can simultaneously drive the second pressure plate 222 and the third pressure plate 251 to move. The accompanying drawings of this embodiment illustrate this shared drive source. This simplifies the structure of the bag opening device. Of course, the second pressure plate 222 and the third pressure plate 251 can also have separate drive sources, i.e., the second pressure plate 222 can be equipped with a corresponding second telescopic cylinder 221, and the third pressure plate 251 with a corresponding third telescopic cylinder. This embodiment does not limit this to a single drive source.

[0116] More specifically, in one embodiment, in the vertical direction H, a first rubber strip 203 extending in the width direction W protrudes from the side of the first pressure plate 202 near the fixing part 26; a second rubber strip 223 extending in the width direction W protrudes from the side of the second pressure plate 222 near the fixing part 26; and a third rubber strip 252 extending in the width direction W protrudes from the side of the third pressure plate 251 near the fixing part 26. This ensures that when the first pressure plate 202, the second pressure plate 222, and the third pressure plate 251 press the corresponding parts of the packaging bag film tightly against one side surface of the fixing part 26, the contact between the first rubber strip 203, the second rubber strip 223, and the third rubber strip 252 with the corresponding parts of the packaging bag film, and the flexibility of the first rubber strip 203, the second rubber strip 223, and the third rubber strip 252, reduces the risk of damage to the packaging bag film.

[0117] It should be understood that the second rubber strip 223 and the third rubber strip 252 are spaced apart from each other in the conveying direction L, so that a clearance space is formed between the second rubber strip 223 and the third rubber strip 252; the clearance space is directly opposite the strip opening on the fixing part 26 in the vertical direction H, so that the cutting head 230 enters the clearance space after passing through the strip opening and does not come into contact with the second rubber strip 223, the third rubber strip 252, the second pressure plate 222, and the third pressure plate 251.

[0118] More specifically, the structure and arrangement of the fixing part 26 are not limited, and those skilled in the art can design it according to their own needs. The following is an example.

[0119] In one implementation, such as Figure 5 As shown, the fixing part 26 includes a fixing plate 260 that is fixedly connected to the frame 3 at both ends in the width direction W and extends along the conveying direction L, and a heating member 261 that is fixedly embedded inside the fixing plate 260. This allows the fixing plate 260 to be heated by the heating member 261. When the end of the packaging bag film from the feeding assembly 1 enters the bag opening assembly 2, the corresponding part of the packaging bag film is pressed and adhered to one side surface of the fixing plate 260 by the first pressure plate 202, the second pressure plate 222, and the third pressure plate 251. The fixing plate 260 can preheat the packaging bag film. Then, when the heat sealing head 210 of the heat sealing component 21 performs heat sealing, the risk of poor heat sealing caused by the large temperature difference between the two sides of the packaging bag film in the vertical direction H is reduced.

[0120] Specifically, in the vertical direction H, the fixing plate 260 has an installation groove extending in the width direction W on the side near the heat sealing component 21. A fourth rubber strip 262 adapted to the installation groove is fixedly embedded in the installation groove, and the fourth rubber strip 262 is directly opposite the heat sealing head 210 in the vertical direction H. By setting the fourth rubber strip 262, the friction between the heat sealing position of the packaging bag film and the fourth rubber strip 262 is increased. When the heat sealing head 210 presses the corresponding part of the packaging bag film for heat sealing, the risk of the heat sealing part of the packaging bag film softening and deforming along the conveying direction L is reduced, thus reducing the risk of poor heat sealing.

[0121] Furthermore, the structure and arrangement of the limiting component, the second limiting component 22, and the third limiting component 25 in another embodiment will be described below.

[0122] Specifically, the first limiting component 20 includes a first limiting drive member mounted on the frame 3 and whose drive end can move along a vertical direction H perpendicular to the width direction W of the packaging bag film, and a first suction nozzle fixedly mounted on the drive end of the first limiting drive member with its suction port facing the packaging bag film; the second limiting component 22 includes a second limiting drive member mounted on the frame 3 and whose drive end can move along a vertical direction H, and a second suction nozzle fixedly mounted on the drive end of the second limiting drive member with its suction port facing the packaging bag film; the third limiting component 25 includes a third limiting drive member mounted on the frame 3 and whose drive end can move along a vertical direction H, and a third suction nozzle fixedly mounted on the drive end of the third limiting drive member with its suction port facing the packaging bag film.

[0123] Specifically, when the feeding assembly 1 conveys the packaging bag film into the opening assembly 2, the driving end of the first limiting drive member moves along the vertical direction H toward the corresponding side of the packaging bag film, thereby causing the first suction nozzle to suck up the corresponding side of the packaging bag film; simultaneously, the driving end of the second limiting drive member moves along the vertical direction H toward the corresponding side of the packaging bag film, thereby causing the second suction nozzle to suck up the corresponding side of the packaging bag film; simultaneously, the driving end of the third limiting drive member moves along the vertical direction H toward the corresponding side of the packaging bag film, thereby causing the third suction nozzle to suck up the corresponding side of the packaging bag film; thus achieving the limiting of the packaging bag film.

[0124] It should be understood that the structure and arrangement of the first limit drive component, the second limit drive component, and the third limit drive component are not limited, and can be, for example, telescopic cylinders, electric push rods, hydraulic cylinders, etc.

[0125] The structure and arrangement of the heat-sealing component 21 and the cutting component 23 will be further explained below.

[0126] In one implementation, such as Figures 3-5 As shown, in the conveying direction L, the heat-sealing component 21 is located on the same side of the fixing part 26 as the first limiting end and the second limiting end. The heat-sealing component 21 includes a heat-sealing head 210 that can move along the vertical direction H toward the fixing part 26. The heat-sealing head 210 can move along the vertical direction H, thereby clamping the corresponding portion of the end of the packaging bag film together with the corresponding portion of the fixing part 26 for heat sealing. This allows the heat-sealing head 210 to press firmly against the corresponding portion of the packaging bag film when heat-sealing the corresponding portion of the packaging bag, improving the heat-sealing effect and resulting in a better seal at the closed end of the heat-sealed packaging bag.

[0127] Furthermore, in the conveying direction L, the cutting component 23 is located on the other side of the fixing part 26, and the cutting head 230 of the cutting component 23 can move toward the fixing part 26 in the vertical direction H. The fixing part 26 has a strip-shaped opening that extends in the width direction W, and the strip-shaped opening is directly opposite the cutting head 230 in the vertical direction H. The cutting head 230 moves in the vertical direction H and passes through the strip-shaped opening through the fixing part 26 to cut the corresponding part of the end of the packaging bag film.

[0128] Specifically, since the heat-sealing component 21 is located on the same side of the fixing part 26 as the first limiting end and the second limiting end in the conveying direction L, while the cutting component 23 is located on the other side of the fixing part 26, after the first limiting end and the second limiting end limit and adhere the packaging bag film to one side surface of the fixing part 26, the packaging bag film is limited by the first limiting end and the second limiting end. Therefore, the cutting head 230 can move in the vertical direction H and pass through the fixing part 26 through the strip opening, and then cut the corresponding part of the end of the packaging bag film. This prevents the cutting head 230 from contacting the fixing part 26, avoiding the risk of the cutting head 230 being damaged during long-term use.

[0129] The following explains the movement method of the heat-sealing component 21. The structure and arrangement of the heat-sealing component 21 are not limited. Those skilled in the art can design it according to their own needs. The following is an example.

[0130] In one implementation, such as Figure 5 As shown, the heat sealing component 21 includes a heat sealing drive cylinder 211 mounted on the frame 3 and whose drive end can move in the vertical direction H, and a heat sealing head 210 connected to the drive end of the heat sealing drive cylinder 211. When heat sealing, the heat sealing drive cylinder 211 drives the heat sealing head 210 to move in the vertical direction H toward the packaging bag film, thereby heat sealing the packaging bag film.

[0131] In another embodiment, the heat sealing component 21 includes a linear motor mounted on the frame 3 and whose drive end can move in the vertical direction H, and a heat sealing plate connected to the drive end of the linear motor; when heat sealing, the linear motor drives the heat sealing plate to move in the vertical direction H toward the packaging bag film, thereby heat sealing the packaging bag film.

[0132] The following explains the movement method of the cutting component 23. The structure and arrangement of the cutting component 23 are not limited. Those skilled in the art can design it according to their own needs. The following is an example.

[0133] In one implementation, such as Figure 5As shown, the cutting component 23 includes a cutting telescopic cylinder 231 mounted on the frame 3 and whose drive end can move in the vertical direction H, and a cutting blade connected to the drive end of the cutting telescopic cylinder 231 to form the cutting part; when cutting, the cutting telescopic cylinder 231 drives the cutting blade to move in the vertical direction H toward the packaging bag film, and after passing through the strip opening, the packaging bag film is cut.

[0134] In another embodiment, the cutting component 23 includes an electric push rod mounted on the frame 3 and whose drive end can move in the vertical direction H, and a pressure knife connected to the drive end of the electric push rod. When cutting, the electric push rod drives the pressure knife to move in the vertical direction H, and after passing through the strip opening, the packaging bag film is cut.

[0135] The structure and arrangement of the bag opening component 24 will be further explained below.

[0136] Specifically, such as Figure 6 As shown, the bag opening component 24 includes multiple pairs of clamping members 240 spaced apart on the frame 3 along the width direction W, and two clamping members 240 in each pair of clamping members 240 are arranged opposite to each other in the vertical direction H.

[0137] Specifically, each clamping member 240 includes a clamping drive member mounted on the frame 3 and whose drive end can move in the vertical direction H, and a clamping part 241 connected to the drive end of the clamping drive member. The clamping drive member drives the clamping part 241 to move in the vertical direction H and clamp the corresponding side of the periphery of the inlet end of the packaging bag.

[0138] More specifically, when opening the bag, the clamping drive member of each clamping member 240 drives the clamping part 241 to move along the vertical direction H toward the entrance end of the packaging bag. Then, the clamping part 241 clamps the corresponding side of the periphery of the entrance end of the packaging bag. The clamping drive member of each clamping member 240 drives the clamping part 241 to move along the vertical direction H toward the entrance end of the packaging bag, thereby facilitating the opening of the packaging bag. In addition, during this process, when opening the opening of the packaging bag, the clamping method limits and holds the corresponding side of the packaging bag, thereby reducing the risk of the packaging bag falling off during the opening process.

[0139] More specifically, the structure and arrangement of the clamping drive component are not limited, for example, it can be a hydraulic cylinder, a telescopic cylinder, a linear motor, etc., and this embodiment does not limit it to a single type.

[0140] More specifically, the mechanism and arrangement of the clamping part 241 are not limited, and the following is an example.

[0141] In one implementation, such as Figure 6 and Figure 7 As shown, the clamping part 241 includes a connecting seat 243 fixedly installed on the driving end of the clamping driving member, and a clamping head 242 movably installed on the connecting seat 243 along the height direction of the frame 3; wherein, the clamping head 242 includes a pair of movable seats 244 movably installed on the connecting seat 243 along the height direction of the frame 3, a pair of finger rollers 246 fixedly installed on the pair of movable seats 244, and a driving member 245 installed between the pair of movable seats 244.

[0142] Specifically, at least one of the two movable seats 244 is slidably connected to the connecting seat 243, and the driving member 245 drives the pair of movable seats 244 to move back to back or towards each other, and in conjunction with the corresponding finger rollers 246 to move and clamp the corresponding side of the packaging bag.

[0143] More specifically, during bag opening, the drive member 245 of each clamping part 241 in each pair of clamping members 240 drives a pair of moving seats 244 to move in opposite directions, thereby causing the pair of finger rollers 246 of one clamping member 240 in each pair of clamping members 240 to be misaligned with the finger rollers 246 of the other clamping member 240 in the conveying direction L. Then, each clamping drive member drives the corresponding clamping part 241 to move along the vertical direction H toward the periphery of the bag opening, until the pair of finger rollers 246 of one clamping member 240 in each pair of clamping members 240 are misaligned with the finger rollers 246 of the other clamping member 240. A pair of finger rollers 246 cooperate in the conveying direction L to limit the periphery of the bag opening. Then, each pair of finger rollers 246 moves towards each other to clamp the periphery of the bag opening. At this time, each clamping drive member drives the corresponding clamping part 241 to move away from the periphery of the bag opening in the vertical direction H, so that the periphery of the bag opening is rubbed open on both sides in the vertical direction H. Then, each finger roller 246 moves towards each other to clamp the corresponding side of the periphery of the bag opening. Each clamping drive member continues to drive the corresponding clamping part 241 to move away from the bag film in the vertical direction H until the bag opening is opened.

[0144] It should be noted that the drive component 245 can be configured as an electric push rod, a telescopic cylinder, etc., and this embodiment does not limit it to a single type.

[0145] More specifically, the clamping head 242 is configured to include a pair of finger rollers 246. When the bag is opened, the finger rollers 246 clamp the corresponding side of the periphery of the bag opening, which can reduce the contact area between the finger rollers 246 and the bag, thereby reducing the risk of damaging the bag when clamping it.

[0146] Furthermore, the bag opening assembly 2 also includes a pair of bag supporting components 27 that are spaced apart along the width direction W on the frame 3 and are located on both sides of the bag opening component 24.

[0147] Specifically, such as Figure 6 and Figure 8 As shown, each bag-supporting component 27 includes a pair of bag-supporting members 270 mounted on the frame 3 that move along the vertical direction H, a bag-supporting driving member 271 mounted on the frame 3 and whose driving end can move along the vertical direction H, and the driving end of the bag-supporting driving member 271 is respectively connected to the corresponding pair of bag-supporting members 270; each bag-supporting member 270 includes a movable frame 274 slidably connected to the frame 3 along the vertical direction H, a driving cylinder 272 mounted on the movable frame 274, and a support plate 273 with one end rotatably connected to the movable frame 274 and the other end being a free end; wherein, the driving end of the driving cylinder 272 is connected to one end of the support plate 273, and the driving cylinder 272 is used to drive the support plate 273 to swing around the vertical direction H.

[0148] More specifically, along the width direction W, on both sides of the bag opening component 24, a pair of bag supporting components 27, when the bag opening of the packaging bag is opened by the bag opening component 24, each pair of bag supporting components 270 further expands the bag opening of the packaging bag and keeps the packaging bag in an expanded state, thereby facilitating the subsequent bagging of the packaging bag.

[0149] Furthermore, since each pair of bag-supporting members 270 of each bag-supporting component 27 can move along the vertical direction H, when the size of the packaging bag changes in the vertical direction H, the position of the pair of bag-supporting members 270 in the vertical direction H can be changed to accommodate packaging bags of different sizes.

[0150] More specifically, after the opening of the packaging bag is opened by the opening component 24, the bag-supporting drive component 271 drives the corresponding pair of bag-supporting components 270 to move along the vertical direction H to the corresponding side of the packaging bag, and then the drive cylinder 272 drives the support plate 273 to swing around the vertical direction H, thereby making the opening of the packaging bag larger. For example, when this bag opening device is applied to a bagging machine, the opening of the packaging bag is made larger, which makes it easier to overlap the periphery of the opening of the packaging bag with the periphery of the box opening.

[0151] More specifically, the structure and arrangement of the bag-supporting drive component 271 are not limited. For example, it can be a telescopic cylinder that corresponds one-to-one with a pair of bag-supporting components 270, and the drive end of each telescopic cylinder is connected to the moving frame 274 of the corresponding bag-supporting component 270. Of course, the bag-supporting drive component 271 can also be configured to include a drive motor and a transmission belt to drive a pair of bag-supporting components 270 to move in the vertical direction H.

[0152] The structure and configuration of the feeding component 1 will be further explained below.

[0153] Specifically, such as Figure 1 and Figure 3 As shown, the feeding assembly 1 includes a first feeding roller 10 and a second feeding roller 11 arranged opposite to each other in the vertical direction H, a connecting frame 14 slidably connected to the frame 3 in the vertical direction H, a first driving member 12 mounted on the frame 3 and whose driving end is drivenly connected to the connecting frame 14, and a second driving member 13 mounted on the frame 3 and whose driving end is drivenly connected to the second feeding roller 11.

[0154] Specifically, in the width direction W, the two ends of the first feeding roller 10 are rotatably connected to the connecting frame 14, and the two ends of the second feeding roller 11 are rotatably connected to the frame 3. The first driving component 12 is used to drive the connecting frame 14 to move in the vertical direction H and to move the first feeding roller 10 in the vertical direction H in conjunction with it. The second driving component 13 is used to drive the second feeding roller 11 to rotate around the width direction W.

[0155] More specifically, the structure and arrangement of the first driving component 12 and the second driving component 13 are not limited. For example, they can be telescopic cylinders, hydraulic cylinders, electric push rods, etc. This embodiment does not limit them to a single type.

[0156] More specifically, when conveying the packaging bag film, the packaging bag film is placed between the first feeding roller 10 and the second feeding roller 11. Then, the first driving member 12 drives the connecting frame 14 to move in the vertical direction H and moves the first feeding roller 10 in the vertical direction H closer to the second feeding roller 11, so that the packaging bag film is clamped by the first feeding roller 10 and the second feeding roller 11. When it is necessary to convey the packaging bag film into the bag opening assembly 2 along the conveying direction L, the second driving member 13 drives the second feeding roller 11 to rotate around the width direction W, so that the packaging bag film is conveyed into the bag opening assembly 2 along the conveying direction L.

[0157] More specifically, the first driving component 12 is used to drive the connecting frame 14 to move in the vertical direction H and to move the first feeding roller 10 away from the second feeding roller 11 in the vertical direction H, thereby increasing the distance between the first feeding roller 10 and the second feeding roller 11 in the vertical direction H, which facilitates the placement of the packaging bag film between the first feeding roller 10 and the second feeding roller 11; and when the thickness of the packaging bag film in the vertical direction H changes, the first driving component 12 is used to drive the connecting frame 14 to move in the vertical direction H and to move the first feeding roller 10 in the vertical direction H, thereby achieving the purpose of adjusting the distance between the first feeding roller 10 and the second feeding roller 11 to accommodate packaging bag films of different thicknesses.

[0158] This utility model also provides a bagging machine, which includes the aforementioned bag opening device and a conveying device that extends along the conveying direction of the packaging box and is arranged on the frame 3. The conveying device is provided with a bagging station. In the height direction of the frame 3, the bag opening device is located above the bagging station. The packaging box is conveyed to the bagging station by the conveying device, and the bag opening device opens the packaging bag.

[0159] Specifically, when this bagging machine is in use, the conveying device transports the packaging box to the bagging station. Then, the end of the packaging bag film from the feeding component 1 enters the bag opening component 2. The first limiting component 20 and the second limiting component 22 limit both ends of the packaging bag film in the conveying direction L, ensuring that the position of the packaging bag film will not shift. This allows the heat sealing component 21 to move toward the packaging bag film, thereby heat-sealing the corresponding part of the end of the packaging bag film. The cutting head 230 of the cutting component 23 moves toward the packaging bag film, thereby cutting the corresponding part of the end of the packaging bag film to form the closed end of the packaging bag. The position of the formed packaging bag will not shift, ensuring that the position of the bag opening will also not shift, so that the packaging bag can be accurately put into the packaging box.

[0160] It should be understood that the structure and arrangement of the conveying device are not limited. For example, it can be a conveyor belt, or multiple conveying rollers arranged side by side on the frame 3 along the conveying direction of the packaging box. This embodiment is not limited to a single one, and those skilled in the art can design it according to their own needs.

[0161] In addition, it should be noted that after the bag opening device opens the packaging bag, it can either move the packaging box along the height direction of the frame 3 and then put the packaging bag into the packaging box, or it can first extend part of the packaging bag into the packaging box and then open the bag opening.

[0162] The above description illustrates the implementation of this utility model through specific embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0163] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0164] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0165] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0166] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0167] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

Claims

1. An opening device, characterized in that The machine comprises a rack, a feeding assembly and a bag opening assembly installed on the rack, wherein The feeding assembly is located upstream of the bag opening assembly in the conveying direction of the bag film of the packaging bag, and the bag film of the packaging bag is fed to the bag opening assembly; The bag opening assembly comprises a first limiting component, a heat sealing component, a cutting component, a second limiting component and a bag opening component arranged in sequence along the conveying direction on the rack, wherein the first limiting component and the second limiting component are located on both sides of the heat sealing component and the cutting component in the conveying direction, and the heat sealing component and the cutting component are movably arranged on both sides of the bag film of the packaging bag respectively; and The end of the bag film of the packaging bag from the feeding assembly enters the bag opening assembly, the first limiting component and the second limiting component limit the end of the bag film of the packaging bag, the heat sealing component moves towards the bag film of the packaging bag to heat seal the corresponding part of the end of the bag film of the packaging bag, the cutting head of the cutting component moves towards the bag film of the packaging bag to cut the corresponding part of the end of the bag film of the packaging bag to form a closed end of the packaging bag, and the bag film of the packaging bag continues to be conveyed until the open end of the packaging bag enters the bag opening component and is opened by the bag opening component.

2. The bag opening apparatus of claim 1, wherein The first limiting component comprises a first limiting end extending along the width direction of the packaging bag, and the second limiting component comprises a second limiting end extending along the width direction; wherein The end of the bag film of the packaging bag from the feeding assembly enters the bag opening assembly, the first limiting end and the second limiting end limit the corresponding parts of the end of the bag film of the packaging bag synchronously; and The first limiting end and the second limiting end are arranged in alignment with intervals in the conveying direction.

3. The bag opening apparatus of claim 2, wherein The first limiting component comprises a first fixed part and a first moving part, wherein the first fixed part is arranged on the rack extending along the width direction, and one side surface thereof is arranged downstream of the outlet end of the feeding assembly extending along the conveying direction; the first moving part is movably arranged on one side of the first fixed part along a vertical direction perpendicular to the width direction, and one side end thereof can abut on the one side surface of the first fixed part; and one side end of the first moving part abutting on the one side surface of the first fixed part forms the first limiting end; and The second limiting component comprises a second fixed part and a second moving part, wherein the second fixed part is arranged on the rack extending along the width direction, and one side surface thereof is arranged downstream of the outlet end of the cutting component extending along the conveying direction; the second moving part is movably arranged on one side of the second fixed part along the vertical direction, and one side end thereof can abut on the one side surface of the second fixed part; and one side end of the second moving part abutting on the one side surface of the second fixed part forms the second limiting end; wherein The vertical direction, the width direction and the conveying direction are perpendicular to each other. The first limiting component comprises a first fixed part and a first moving part, wherein the first fixed part is arranged on the rack extending along the width direction, and one side surface thereof is arranged downstream of the outlet end of the feeding assembly extending along the conveying direction; the first moving part is movably arranged on one side of the first fixed part along a vertical direction perpendicular to the width direction, and one side end thereof can abut on the one side surface of the first fixed part; and one side end of the first moving part abutting on the one side surface of the first fixed part forms the first limiting end; and 4. The bag opening apparatus of claim 3, wherein ​ The first fixed part and the second fixed part are aligned in the conveying direction and integrally form a fixed part, and the first limiting end and the second limiting end are located on the same side of the fixed part in the conveying direction; and The heat sealing part and the cutting part are respectively located on opposite sides of the fixed part in the conveying direction.

5. The bag opening apparatus of claim 4, wherein Wherein In the conveying direction, the heat sealing part is located on the same side of the fixed part as the first limiting end and the second limiting end, and the heat sealing part includes a heat sealing head that can move towards the fixed part in the vertical direction, the heat sealing head can move in the vertical direction and jointly hold a corresponding part of the end of the bag film of the packaging bag with a corresponding part of the fixed part to perform heat sealing; and In the conveying direction, the cutting part is located on the other side of the fixed part, and the cutting head of the cutting part can move towards the fixed part in the vertical direction, the fixed part is provided with a strip-shaped opening extending in the width direction, and the strip-shaped opening is directly opposite the cutting head in the vertical direction, the cutting head moves in the vertical direction and penetrates the fixed part through the strip-shaped opening to cut the corresponding part of the end of the bag film of the packaging bag.

6. The bag opening apparatus of claim 5, wherein Further comprising a third limiting part provided on the rack, and the third limiting part is located between the heat sealing part and the cutting part in the conveying direction; wherein The third limiting part includes a third moving part, and the third moving part is movably provided on one side of the fixed part in the vertical direction, one end of the third moving part abuts on the one side surface of the fixed part, and the other end of the third moving part abuts on the one side surface of the fixed part to form a third limiting end; and The third limiting end synchronously limits the corresponding parts of the ends of the bag film of the packaging bag with the first limiting end and the second limiting end.

7. The bag opening apparatus of claim 6, wherein Wherein The first moving part includes a first telescopic cylinder mounted on the rack and having a drive end movable in the vertical direction, and a first pressing plate drivingly connected to the drive end of the first telescopic cylinder and extending in the width direction; The second moving part includes a second telescopic cylinder mounted on the rack and having a drive end movable in the vertical direction, and a second pressing plate drivingly connected to the drive end of the second telescopic cylinder and extending in the width direction; The third moving part includes a third telescopic cylinder mounted on the rack and having a drive end movable in the vertical direction, and a third pressing plate drivingly connected to the drive end of the third telescopic cylinder and extending in the width direction; and In the vertical direction, a first rubber strip extending in the width direction is protrudingly provided on one side of the first pressing plate close to the fixed part, a second rubber strip extending in the width direction is protrudingly provided on one side of the second pressing plate close to the fixed part, and a third rubber strip extending in the width direction is protrudingly provided on one side of the third pressing plate close to the fixed part.

8. The bag opening apparatus of claim 5, wherein The fixing part comprises a fixing plate fixedly connected with the rack at both ends in the width direction and extending along the conveying direction, and a heating member fixedly embedded in the fixing plate. In the vertical direction, one side of the fixing plate close to the heat sealing part is provided with a mounting groove extending along the width direction, and a fourth rubber strip matching the mounting groove is fixedly embedded in the mounting groove, and the fourth rubber strip is opposite to the heat sealing head in the vertical direction.

9. A bag opening device according to any one of claims 3 to 8, characterised in that, The feeding assembly comprises a first feeding roller and a second feeding roller arranged opposite to each other in the vertical direction, a connecting frame slidingly connected with the rack in the vertical direction, a first driving member mounted on the rack and drivingly connected with the connecting frame, and a second driving member mounted on the rack and drivingly connected with the second feeding roller in the driving end; wherein, In the width direction, both ends of the first feeding roller are rotatably connected with the connecting frame, and both ends of the second feeding roller are rotatably connected with the rack, the first driving member is used to drive the connecting frame to move along the vertical direction and drive the first feeding roller to move along the vertical direction, and the second driving member is used to drive the second feeding roller to rotate around the width direction.

10. A bag opening device according to any one of claims 3 to 8, wherein The bag opening part comprises a plurality of pairs of clamping members arranged on the rack in the width direction, and two clamping members in each pair of clamping members are arranged opposite to each other in the vertical direction; wherein, Each clamping member comprises a clamping driving member mounted on the rack and having a driving end movable along the vertical direction, and a clamping part drivingly connected with the driving end of the clamping driving member, the clamping driving member drives the clamping part to move along the vertical direction and clamps a corresponding side of the periphery of the inlet end of the packaging bag.

11. The bag opening apparatus of claim 10, wherein The clamping part comprises a connecting seat fixedly mounted on the driving end of the clamping driving member, and a clamping head movably mounted on the connecting seat in the height direction of the rack; wherein, The clamping head comprises a pair of moving seats movably mounted on the connecting seat in the height direction of the rack, a pair of finger rollers fixedly mounted on the pair of moving seats correspondingly, and a driving member mounted between the pair of moving seats; wherein, At least one of the moving seats in the pair of moving seats is slidingly connected with the connecting seat, and the driving member drives the pair of moving seats to move away from or towards each other and drives the corresponding finger rollers to move and clamp a corresponding side of the packaging bag.

12. The bag opening apparatus of claim 10, wherein The bag opening assembly further comprises a pair of bag supporting parts arranged on the rack in the width direction and corresponding to both sides of the bag opening part; wherein, Each of the bag supporting components comprises a pair of bag supporting members movably mounted on the frame along the vertical direction, a bag supporting driving member movably mounted on the frame and having a driving end movable along the vertical direction, and the driving end of the bag supporting driving member is in driving connection with a corresponding pair of the bag supporting members; each of the bag supporting members comprises a moving frame slidably connected to the frame along the vertical direction, a driving cylinder mounted on the moving frame, and a supporting plate rotatably connected to the moving frame at one end and having a free end at the other end; wherein the driving end of the driving cylinder is in driving connection with one end of the supporting plate, and the driving cylinder is used to drive the supporting plate to swing about the vertical direction.

13. A bagging machine characterized by The bagging machine comprises the bag opening device according to any one of claims 1-12, and a conveying device arranged on the frame along the conveying direction of the packaging box, and the conveying device is provided with a bagging station; wherein in the height direction of the frame, the bag opening device is located above the bagging station, the packaging box is conveyed to the bagging station by the conveying device, and the bag opening device opens the packaging bag.

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