Bag mouth forming mechanism of bagging machine

Abstract

The utility model discloses a bag mouth forming mechanism of a bagging machine, which is mounted on a rack and comprises a bag folding device, the bag folding device comprises a sliding frame, an opening component and two folding plates arranged in a mirror image manner, the opening component comprises two opening groups arranged in a mirror image manner, and each opening group comprises two L-shaped opening plates. The two folded plates are located between the two opening plates in the corresponding opening sets respectively. The sliding frame can be transversely installed on the machine frame in a sliding mode, an opening moving device, two opening and closing devices and a folded plate opening and closing device are installed on the sliding frame, and the two opening sets jointly move oppositely or oppositely in the longitudinal direction through the opening moving device. The two opening plates in each opening set move oppositely or oppositely in the vertical direction through an opening and closing device, and the two folded plates move oppositely or oppositely in the longitudinal direction through a folded plate opening and closing device jointly. Therefore, all the driving devices are simple in structure, stability and accuracy during bag folding are guaranteed during bag folding, and abrasion of all the driving devices is low.

Description

Technical Field

[0001] This utility model relates to the field of food packaging equipment technology, and more specifically to a forming bag mouth mechanism of a bagging machine. Background Technology

[0002] In the existing bagging machine packaging process, the function of the forming bag opening mechanism is to fold and arrange the opening of the packaged bag containing the product for subsequent sealing operations. Traditional forming bag opening mechanisms generally use the following driving methods: 1. Using a cylinder as a power source, the extension and retraction of the cylinder is controlled by a solenoid valve to drive the folding plate or folding claw in the forming mechanism to complete the bag folding action. This driving method has a simple structure, but the cylinder is easily affected by air pressure fluctuations, which can easily cause the bag opening to be crooked.

[0003] 2. The main drive shaft drives the cam mechanism, which makes the bag folding actuator of the forming bag mouth mechanism move along a fixed trajectory to fold the bag mouth of the packaging bag. In this driving method, the contact surface between the cam and the driven part is prone to wear and requires frequent maintenance.

[0004] In view of this, this application has conducted in-depth research on this basis, resulting in this case. Utility Model Content

[0005] The purpose of this invention is to provide a forming bag opening mechanism for a bag-making machine, which has a simple driving structure, good stability and precision in folding the bag opening, and requires no frequent maintenance.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A bag-forming mechanism for a bag-packing machine is mounted on a frame, on which a platform for placing packaging bags is installed. The machine includes a bag-folding device, comprising a sliding frame, a bag-opening assembly for opening the bag opening, and two folding plates for folding the bag. The two folding plates are arranged in a mirror image. The bag-opening assembly includes two sets of mirror-arranged opening groups, each set including two opening plates arranged sequentially vertically. Each opening plate is L-shaped, and the two folding plates are respectively located between the two opening plates in their respective opening groups. The machine frame is positioned close to... Alternatively, the direction away from the platform is horizontal, and the direction perpendicular to the horizontal is longitudinal. The sliding frame is installed on the frame in a horizontal sliding manner, and the sliding frame is equipped with a spreading and moving device, two spreading and opening / closing devices, and a folding plate opening / closing device. The two spreading groups move relative to each other or in opposite directions in the longitudinal direction through the spreading and moving device, and the two spreading plates in each spreading group move relative to each other or in opposite directions in the vertical direction through the spreading and opening / closing device. The two folding plates move relative to each other or in opposite directions in the longitudinal direction through the folding plate opening / closing device.

[0008] The frame is equipped with two parallel frame slide rails, both of which are arranged laterally, and each of the two frame slide rails is slidably mounted with a frame slider. The bottom of the sliding frame is mounted on the two frame sliders.

[0009] The sliding frame is equipped with a sliding device, which includes a sliding frame motor and a first crank-connecting rod structure. The first crank-connecting rod structure includes a frame crank and a frame connecting rod arranged laterally. The sliding frame motor is mounted on the frame, and the output shaft of the sliding frame motor is drivenly connected to the frame crank. One end of the frame connecting rod is movably connected to the frame crank, and the other end of the frame connecting rod is movably connected to the sliding frame.

[0010] Both of the aforementioned folding plates each have a folding plate mounting section and a folding bag section. The two folding plate mounting sections are respectively fixedly mounted on the folding plate bracket. The two folding plate brackets are respectively mounted on the sliding frame in a manner that allows them to slide relative to each other or back to back along the longitudinal direction. The two folding bag sections are respectively located between the two spreading plates in the corresponding spreading group.

[0011] The sliding frame is provided with a folding plate limiting slide rail and a main slide rail along the longitudinal direction. A folding plate limiting slider is installed on one of the folding plate brackets. The folding plate limiting slider is slidably engaged with the folding plate limiting slide rail. Folding plate sliders are installed on both folding plate brackets. Both folding plate sliders are slidably engaged with the main slide rail.

[0012] The folding plate opening and closing device includes a folding plate motor and a second crank connecting rod structure. The second crank connecting rod structure includes a Z-shaped folding plate connector and two folding plate connecting rods. The folding plate motor is mounted on the sliding frame, and the output shaft of the folding plate motor is driven to the middle position of the folding plate connector. One end of one of the folding plate connecting rods is movably connected to the first end of the folding plate connector, and the other end of the other folding plate connecting rod is movably connected to the adjacent first folding plate bracket. One end of the other folding plate connecting rod is movably connected to the second end of the folding plate connector, and the other end of the other folding plate connecting rod is movably connected to a folding plate linkage bracket. A folding plate linkage slider is mounted on the folding plate linkage bracket, and the folding plate linkage slider is slidably mounted on the main slide rail. The folding plate linkage bracket and the second folding plate bracket are connected together by a connecting plate.

[0013] Each of the aforementioned support plates includes a support section arranged laterally and a support mounting section arranged longitudinally. The support section on each of the aforementioned support plates is integrally connected to the support mounting section. Each of the aforementioned support mounting sections is respectively equipped with a support bracket. The two support brackets in each support group are jointly assembled on the support mounting plate. One side of each support mounting plate is equipped with a mounting plate slide rail arranged vertically, and the other side of each support mounting plate is equipped with a mounting plate slider. Each of the aforementioned support brackets is respectively equipped with a support slider that slides vertically. The two support sliders on the two support brackets in each support group are respectively slidably engaged with the two mounting plate slide rails on the same support mounting plate. The two mounting plate sliders are respectively slidably mounted on the main slide rail.

[0014] Each of the two expansion mounting plates is equipped with two mounting plate slide rails arranged vertically, and the two mounting plate slide rails on each expansion mounting plate are respectively slidably engaged with the corresponding expansion slider.

[0015] The spreading and moving device is located between the two spreading mounting plates, and includes a spreading and moving motor and a third crank-connecting rod structure. The third crank-connecting rod structure includes a Z-shaped spreading connector and two spreading connecting rods. The spreading and moving motor is mounted on the sliding frame, and the output shaft of the spreading and moving motor is driven to the middle position of the spreading connector. One end of one of the spreading connecting rods is movably connected to the first end of the spreading connector, the other end of one of the spreading connecting rods is movably connected to one of the spreading mounting plates, one end of the other spreading connecting rod is movably connected to the second end of the spreading connector, and the other end of the other spreading connecting rod is movably connected to the other spreading mounting plate.

[0016] Both opening and closing devices include an opening and closing motor and a gear and rack structure. In each opening and closing device, the gear and rack structure includes a gear and two oppositely arranged racks. The two racks are respectively fixedly installed on the lower part of the opening bracket provided in the same opening group. The opening and closing motor is installed on the opening mounting plate, and the output shaft of the opening and closing motor is drivenly connected to the gear. The gear is located between the two racks and meshes with the two racks. When the two opening plates in the same opening group are in a closed state, the upper end of the rack adjacent to the third crank connecting rod structure corresponds to the lower end of the other rack.

[0017] The bottom of the frame is equipped with clamping brackets arranged vertically. Two clamping slide rails are arranged side by side on the clamping brackets. Clamping sliders are slidably installed on the two clamping slide rails. One clamping slider is fixedly equipped with an upper clamping plate, and the other clamping slider is fixedly equipped with a lower clamping plate. The clamping parts of the upper clamping plate and the lower clamping plate are arranged opposite to each other and are both arranged longitudinally. The upper clamping plate and the lower clamping plate move relative to each other or away from each other under the action of the clamping device, and the clamping parts of the upper clamping plate and the lower clamping plate are both within the movement range of the folding plate.

[0018] It also includes a clamping and conveying device, which includes the clamping device, which includes a clamping opening and closing motor and a fourth crank connecting rod structure. The fourth crank connecting rod structure includes a cross-shaped clamping connector and two clamping connecting rods, which are arranged clockwise as a first end, a second end, a third end, and a fourth end. The clamping opening and closing motor is mounted on the clamping bracket, and the output shaft of the clamping opening and closing motor is driven to the middle position of the clamping connector. One end of one clamping connecting rod is movably connected to the first end of the clamping connector, and the other end of one clamping connecting rod is movably connected to the fourth end of the clamping connector and a corresponding position of the upper clamping plate. One end of the other clamping connecting rod is movably connected to the second end of the clamping connector, and the other end of the other clamping connecting rod is movably connected to the third end of the clamping connector and a corresponding position of the lower clamping plate.

[0019] The clamping and conveying device further includes a clamping moving device. A frame slide rail is installed at the bottom of the frame, and a frame slider is slidably installed on the frame slide rail. The clamping bracket is installed on the frame slider, and the clamping bracket slides longitudinally via the clamping moving device. The clamping moving device includes a clamping moving motor and a fifth crank-connecting rod structure. The fifth crank-connecting rod structure includes a clamping moving crank and a clamping moving connecting rod arranged longitudinally. The clamping moving motor is installed at the bottom of the frame, and the output shaft of the clamping moving motor is drivenly connected to the clamping moving crank. One end of the clamping moving connecting rod is movably connected to the clamping moving crank, and the other end of the clamping moving connecting rod is movably connected to the clamping bracket.

[0020] With the above structure, this utility model has the following beneficial effects: This utility model uses the sliding of the sliding frame to move the folding plate and the two supporting groups to the platform where the packaging bag is located. The supporting moving device moves the supporting plates in the two supporting groups to the bag opening. Then, through the synchronous action of the two supporting opening and closing devices, the two supporting plates in the same group move back to back, thereby opening the four corners of the bag opening. During this process, the two folding plates are located on the outside of the two sides of the packaging bag. Then, driven by the folding plate opening and closing device, the two folding plates move relative to each other, thereby folding the bag opening inward to fold the packaging bag. Compared with the prior art, the structure of each driving device (i.e., the supporting moving device, the two supporting opening and closing devices, and the folding plate opening and closing device) in this utility model is simple. Since each driving device is driven by a motor, the stability and accuracy of folding the packaging bag are ensured. In addition, the wear of each driving device is low, so frequent maintenance is not required. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the bag opening forming mechanism of this utility model.

[0022] Figure 2 This is a schematic diagram of the bag folding device in the bag forming mechanism of this utility model.

[0023] Figure 3 This is a schematic diagram of the bag folding device in the bag forming mechanism of this utility model from another angle.

[0024] Figure 4 This is a schematic diagram showing the arrangement of the opening component and the two folding plates of the bag folding device in the bag forming mechanism of this utility model.

[0025] Figure 5 This is a schematic diagram of the clamping and conveying device in the forming bag opening mechanism of this utility model.

[0026] In the picture:

[0027] 100 - Frame; 200 - Platform; 300 - Bag suction and transfer mechanism; 400 - Rotary bag support mechanism; 500 - Material pushing mechanism;

[0028] 1-Sliding frame; 11-Sliding rail; 12-Slider; 13-Sliding frame motor; 14-Crank; 15-Connecting rod;

[0029] 2-Folding plate; 21-Folding plate installation section; 22-Folding bag section; 23-Folding plate bracket; 24-Folding plate linkage bracket; 25-Connecting plate;

[0030] 3-Spreading assembly; 31-Spreading plate; 311-Spreading section; 312-Spreading mounting section; 32-Spreading bracket; 33-Spreading mounting plate; 34-Spreading moving motor; 35-Spreading connector; 36-Spreading link; 37-Spreading opening and closing motor; 38-Rack; 39-Gear;

[0031] 41-Main slide rail; 42-Folding plate limiting slide rail; 43-Folding plate limiting slider; 44-Folding plate slider; 45-Folding plate linkage slider; 46-Auxiliary slide rail; 48-Mounting plate slide rail; 49-Opening slider;

[0032] 51-Folding plate motor; 52-Folding plate connector; 53-Folding plate connecting rod;

[0033] 61-Clamping bracket; 62-Clamping slide rail; 63-Clamping slider; 64-Clamping upper plate; 641-Clamping part; 65-Clamping lower plate; 66-Clamping opening and closing motor; 67-Clamping connector; 68-Clamping link;

[0034] 71-Frame slide rail; 72-Frame slider;

[0035] 81-Clamping the moving motor; 82-Clamping the moving crank; 83-Clamping the moving connecting rod. Detailed Implementation

[0036] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0037] This utility model provides a bag forming mechanism for a bag-making machine, which is an improvement on existing bag-making machines on the market, and is preferably suitable for horizontal bag-making machines, such as... Figure 1 As shown, a conventional horizontal bagging machine includes a frame 100 and a bag placement mechanism, a bag conveying mechanism, a bag suction and transfer mechanism 300, a rotating bag supporting mechanism 400, a material pushing mechanism 500, a material feeding and conveying mechanism, and an output mechanism arranged sequentially on the frame 100 in the conveying direction. For example, the "Horizontal Bagging Machine" with announcement number CN211167615U; wherein, the output mechanism is provided with a platform 200 for conveying, which can be a conventional belt conveyor platform. During operation, the packaging bags placed in the packaging bag placement mechanism are transported to the position of the suction bag transfer mechanism via the packaging bag conveying mechanism. Then, the suction bag transfer mechanism sucks open the packaging bag and moves it to the position of the rotating bag opening mechanism. The rotating bag opening mechanism opens the opening of the packaging bag and moves the opened packaging bag to the position of the feeding conveying mechanism. The pushing mechanism pushes the material of the feeding conveying mechanism into the packaging bag and moves the packaging bag together with the material to the output mechanism. The packaging bag is then output through the output mechanism.

[0038] like Figure 1 As shown - Figure 5 As shown, the improvement of this utility model is that a forming bag opening mechanism is installed between the above-mentioned feeding conveying mechanism and the output mechanism. This forming bag opening mechanism is used to fold the bag opening of the packaging bag.

[0039] For ease of description, the normal operating state of this utility model is taken as the reference direction of this utility model, and the direction in which the frame 100 is close to or away from the platform 200 is taken as the horizontal direction, and the direction perpendicular to the horizontal direction is taken as the vertical direction. In this embodiment, the horizontal direction is taken as the front-to-back direction, and the vertical direction is taken as the left-to-right direction.

[0040] like Figure 2 As shown - Figure 4 As shown, the above-mentioned forming bag opening mechanism includes a bag folding device, which includes a sliding frame 1, an opening assembly for opening the bag opening, and two folding plates 2 for folding the bag opening. The opening assembly includes two sets of mirror-arranged opening groups 3, each of which includes two facing opening plates 31, and the two opening plates 31 in each opening group 3 are arranged sequentially from top to bottom, and each opening plate 31 is L-shaped. The two folding plates 2 are mirror-arranged, and the two folding plates 2 are paired one-to-one with the two opening groups 3, and the two folding plates 2 are respectively located between the two opening plates 31 of the corresponding opening group 3. The sliding frame 1 is arranged longitudinally and can slide laterally. The mechanism is installed on the frame 100 in a certain way. In this embodiment, the side where the platform 200 is located is the rear side of the forming bag opening mechanism, and the opposite side is the front side, that is, the horizontal direction is the front and back direction. The sliding frame 1 is equipped with a folding plate opening and closing device, a spreading moving device and two spreading opening and closing devices. The two folding plates 2 move relative to each other or opposite to each other in the longitudinal direction through the folding plate opening and closing device. The two spreading groups 3 move relative to each other or opposite to each other in the longitudinal direction through the spreading moving device. The two spreading groups 3 and the two spreading opening and closing devices are matched one-to-one. The two spreading plates 31 in each spreading group 3 move relative to each other or opposite to each other in the vertical direction through the corresponding spreading opening device.

[0041] Specifically, such as Figure 2 As shown - Figure 3 As shown, the sliding structure of the sliding frame 1 is as follows: two parallel sliding rails 11 are installed on the frame 100. Both sliding rails 11 are arranged laterally, and sliding blocks 12 are slidably installed on the two sliding rails 11 respectively. The bottom of the sliding frame 1 is fixedly installed on the two sliding blocks 12 respectively, and the two sliding blocks 12 are respectively located on the left and right sides of the bottom of the sliding frame 1. Preferably, the sliding frame 1 is L-shaped, and the sliding frame 1 and the two sliding blocks 12 are installed together by conventional installation structures, such as bolts or rivets for locking.

[0042] To elaborate further, such as Figure 3 As shown, the aforementioned sliding frame 1 uses a sliding device to achieve automated sliding. Specifically, this sliding device includes a sliding frame motor 13 and a first crank-connecting rod structure. The first crank-connecting rod structure includes a frame crank 14 and a frame connecting rod 15 arranged laterally. The housing of the sliding frame motor 13 is fixedly mounted on the frame 100, and the output shaft of the sliding frame motor 13 is arranged upwards. The frame crank 14 is in a straight line shape. The output shaft of the sliding frame motor 13 is connected to the rear end of the frame crank 14. The two are linked in a conventional way; for example, the rear end of the frame crank 14 is fitted with an expansion sleeve used in conventional motors. The output shaft of the sliding frame motor 13 is tightly installed inside the expansion sleeve, so that the rotation of the output shaft of the sliding frame motor 13 drives the frame crank 14 to perform circular motion with the rear end as the base point. Preferably, the output shaft of the sliding frame motor 13 is connected to the rear end of the frame crank 14 through a planetary reducer. The front end of the frame connecting rod 15 is hinged to the front end of the frame crank 14. The two are hinged by conventional methods such as rotating shafts or pins. For example, the front ends of the two are respectively provided with corresponding mounting holes, and pins are inserted into the two mounting holes. Furthermore, the rear end of the frame connecting rod 15 is hinged to the middle position of the upper side of the front side of the sliding frame 1.

[0043] Thus, when the crank 14 moves in a forward circular motion with its rear end as the base point, it drives the connecting rod 15 of the frame to move together. Due to the cooperation between the frame slide rail 11 and the frame slider 12, the sliding frame 1 is limited to the lateral position, so the sliding frame 1 slides backward. As the crank 14 continues to rotate, it drives the sliding frame 1 to slide forward.

[0044] like Figure 3 As shown - Figure 4 As shown, each of the two folding plates 2 includes an integrally connected folding plate mounting section 21 and a folding bag section. The width of the folding plate mounting section 21 in each folding plate 2 is smaller than the width of the folding bag section 22. The two folding bag sections 22 are arranged close to each other and are respectively located between the two supporting plates 31 in the corresponding supporting group 3. The two folding plate mounting sections 21 are respectively fixedly installed on the upper end face of the folding plate bracket 23, that is, there are two folding plate brackets 23. The two folding plate brackets 23 are arranged vertically and vertically, and the two folding plate brackets 23 can be installed on the sliding frame 1 in a longitudinally relative or opposite manner.

[0045] Furthermore, the rear side of the aforementioned sliding frame 1 is respectively provided with a longitudinally arranged folding plate limiting slide rail 42 and a main slide rail 41. The main slide rail 41 is located above or below the folding plate limiting slide rail 42. In this embodiment, the main slide rail 41 is located below the folding plate limiting slide rail 42 as an example for explanation. The folding plate limiting slide rail 42 is located on the left or right side of the sliding frame 1. In this embodiment, the folding plate limiting slide rail 42 is located on the left side of the sliding frame 1 as an example for explanation. The length of the folding plate limiting slide rail 42 is less than the length of the main slide rail 41, and the folding plate limiting slide rail 42 is located on the left side of the sliding frame 1. The length of the rail 42 is set according to the maximum distance that the folding plate actually needs to move, and is not limited here; a folding plate limiting slider 43 is installed on the folding plate bracket 23 on the left side, and the folding plate limiting slider 43 slides in cooperation with the folding plate limiting slide rail 42. Preferably, the folding plate limiting slide rail 42 is located in the middle position of the sliding frame 1; and, folding plate sliders 44 are respectively installed on the front side of the two folding plate brackets 23, and the two folding plate sliders 44 slide in cooperation with the main slide rail 41, so that the two folding plate brackets 23 slide along the main slide rail 41 respectively.

[0046] Furthermore, the aforementioned folding plate opening and closing device includes a folding plate motor 51 and a second crank connecting rod structure. The second crank connecting rod structure includes a Z-shaped folding plate connector 52 and two folding plate connecting rods 53. The housing of the folding plate motor 51 is fixedly mounted on the sliding frame 1 and located on the left side of the front of the sliding frame 1. The output shaft of the folding plate motor 51 is arranged rearward, and the output shaft of the folding plate motor 51 is connected to the middle position of the folding plate connector 52. Both use a conventional transmission structure; for example, a mounting hole is provided on the left side of the sliding frame 1, and an expansion sleeve is embedded in the middle position of the folding plate connector 52. The output shaft of the folding plate motor 51 passes through the mounting hole and is installed in the expansion sleeve, so that the rotation of the output shaft of the folding plate motor 51 drives the folding plate connector 52 to perform circular motion around the middle position as a base point. Preferably, the output shaft of the folding plate motor 51 is connected to the middle position of the folding plate connector 52 through a planetary reducer. The first folding plate... The first end of the plate connecting rod 53 is hinged to the first end of the folding plate connector 52. The second end of the first folding plate connecting rod 53 is hinged to the adjacent folding plate bracket 23. The first end of the second folding plate connecting rod 53 is hinged to the second end of the folding plate connector 52. The second end of the second folding plate connecting rod 53 is hinged to the folding plate linkage bracket 24. The folding plate linkage bracket 24 is arranged vertically, and a folding plate linkage slider 45 is fixedly installed on the front side of the folding plate linkage bracket 24. The folding plate linkage slider 45 slides in cooperation with the main slide rail 41. The folding plate linkage bracket 24 and the folding plate bracket 23 on the right side are connected together by a connecting plate 25. That is, the connecting plate 25 is n-shaped. One end of the connecting plate 25 is fixedly installed on the upper side of the folding plate linkage bracket 24, and the other end is fixedly installed on the folding plate bracket 23 on the right side. Preferably, the other end of the connecting plate 25 is fixedly installed on the upper side of the folding plate slider 44 on the upper side.

[0047] Preferably, to ensure the stability of the two folding plates 2 when moving longitudinally, an auxiliary slide rail 46 is also installed on the rear side of the sliding frame 1. The auxiliary slide rail 46 is arranged longitudinally and is arranged side by side with the main slide rail 41. The two slide rails are of the same length and are located above the folding plate limiting slide rail 42. The two ends of the auxiliary slide rail 46 extend to the left and right sides of the sliding frame 1, respectively. Two folding plate linkage sliders 45 are provided on the folding plate linkage bracket 24. The two folding plate linkage sliders 45 slide in cooperation with the auxiliary slide rail 46 and the main slide rail 41, respectively. In addition, two folding plate sliders 44 are fixedly installed on the folding plate bracket 23 on the right side. The two folding plate sliders 44 slide in cooperation with the auxiliary slide rail 46 and the main slide rail 41, respectively.

[0048] In this way, when the output shaft of the folding plate motor 51 rotates in the forward direction to drive the folding plate connector 52 to perform a forward circular motion with its middle position as the base point, the two folding plate connecting rods 53 are activated, causing the folding plate bracket 23 on the left to slide to the right. At the same time, through the connecting plate 25, the folding plate bracket 23 on the right is driven to slide to the left, thereby realizing the relative movement of the two folding plates 2. Correspondingly, when the output shaft of the folding plate motor 51 rotates in the reverse direction to drive the folding plate connector 52 to perform a reverse circular motion with its middle position as the base point, the two folding plates 2 move in opposite directions.

[0049] The structures and installation structures of the aforementioned support plates 31 are identical. Therefore, one support plate 31 will be used as an example for explanation. The support plate 31 includes a horizontally arranged support section 311 and a longitudinally arranged support mounting section 312. The support section 311 and the support mounting section 312 are integrally connected. The support mounting section 312 is fixedly installed on the support bracket 32, which is arranged vertically. That is, the support mounting section 312 is fixedly installed on the upper part of the support bracket 32. The support bracket 32 ​​slides vertically via the support mounting plate 33. The two support brackets 24 in each support group 3 are jointly assembled on the support mounting plate 33. The sliding structures of the support brackets 24 are identical; therefore, one will be used as an example for explanation. To elaborate, a mounting plate slider is fixedly installed on the front side of the support mounting plate 33. Preferably, two mounting plate sliders are fixedly installed on the front side of the support mounting plate 33, and the two mounting plate sliders are respectively slidably engaged with the main slide rail 41 and the auxiliary slide rail 46. Furthermore, a vertically arranged mounting plate slide rail 48 is fixedly installed on the rear side of the support mounting plate 33. That is, in this embodiment, there are two mounting plate slide rails 48 on the support mounting plate 33, and the two mounting plate slide rails 48 are arranged side by side. A support slider 49 is fixedly installed on the front side of the support bracket 32. The support slider 49 and the mounting plate slide rail 48 are slidably engaged, so that the support bracket 32 ​​slides in the vertical direction, thereby driving the support plate 31 on it to move up and down.

[0050] Furthermore, the aforementioned spreading and moving device is located between the two spreading mounting plates 33. This spreading and moving device includes a spreading and moving motor 34 and a third crank-connecting rod structure. This third crank-connecting rod structure is the same as the aforementioned second crank-connecting rod structure, including a Z-shaped spreading connector 35 and two spreading connecting rods 36. The housing of the spreading and moving motor 34 is fixedly mounted on the sliding frame 1, and the output shaft of the spreading and moving motor 34 is drively connected to the middle position of the spreading connector 35. Both are installed in the manner described in the second crank-connecting rod section. The first spreading connecting rod 36... The first end of the first extension rod 36 is hinged to the first end of the extension connector 35, and the second end of the first extension rod 36 is hinged to the adjacent extension mounting plate 33. Preferably, the two extension mounting plates 33 are integrally connected with mounting lugs on one side of the extension connector 35 respectively. The second end of the first extension rod 36 is hinged to the mounting lug of the adjacent extension mounting plate 33 in the aforementioned manner. The first end of the second extension rod 36 is hinged to the second end of the extension connector 35, and the second end of the second extension rod 36 is hinged to the mounting lug of the other extension mounting plate 33.

[0051] Furthermore, since the two opening and closing devices described above have the same structure, we will take one of them as an example for explanation. The opening and closing device includes an opening and closing motor 37 and a gear and rack structure. The gear and rack structure includes a gear 39 and two opposing racks 38. The two racks 38 are arranged vertically and are respectively fixedly installed on the lower part of the two opening brackets 24 in the same opening group 3. That is, the lower part of the two opening brackets 24 has a clearance recess on the side of the two brackets that are close to each other. The two clearance recesses extend to the lower side of the corresponding opening brackets 24, and the two racks 38 are respectively fixedly installed in the corresponding clearance recesses. The output shaft of the opening and closing motor is arranged rearward, and the housing of the opening and closing motor 37 is fixedly installed on the lower part of the corresponding opening mounting plate 33. The lower part of the opening mounting plate 33 has a mounting hole. The output shaft passes through the mounting hole. At this time, the output shaft of the opening and closing motor 37 is located between the two racks 38. The rear end of the output shaft of the opening and closing motor 37 is tightly fitted with a gear 39. The gear 39 meshes with the two racks 38 respectively. Preferably, the output shaft of the opening and closing motor 37 is connected to the gear 39 through a planetary reducer. In addition, the opening plate 31 on the opening bracket 24 adjacent to the opening connector in the same opening group 3 is located on the upper side of the other opening plate 31. When the two opening plates 31 in the same opening group 3 are in a closed state, the upper end of the rack 38 closer to the opening connector 35 in the third crank structure corresponds to the lower end of the other rack 38. When the two opening plates 31 in the same opening group 3 are in a fully open state, the lower end of the rack 38 closer to the opening connector 35 in the third crank structure corresponds to the upper end of the other rack 38.

[0052] In this way, when the spreading and moving motor 34 is working in the forward direction, the output shaft of the spreading and moving motor 34 rotates in the forward direction to drive the spreading connecting piece 35 to make a circular motion with its middle position as the base point. This causes the two spreading connecting rods 36 to drive the two spreading mounting plates 33 to move closer to each other (i.e., move relative to each other), so that the two sets of spreading groups 3 move closer to each other. Since the third crank connecting rod structure has a limited stroke, it will stop moving closer when the two spreading groups are close to each other. Correspondingly, the output shaft of the spreading and moving motor 34 rotates in the reverse direction to drive the spreading connecting piece 35 to make a circular motion with its middle position as the base point. This causes the two spreading connecting rods 36 to drive the two spreading mounting plates 33 to move away from each other (i.e. move in opposite directions), so that the two sets of spreading groups 3 open and move away from each other.

[0053] Furthermore, in the initial state, the two support plates 31 are in a closed state. When the opening and closing motors 37 work synchronously, the output shafts of the two opening and closing motors 37 rotate synchronously in opposite directions, thereby driving the two gears 39 to rotate. Since each gear 39 meshes with the two racks 38, the support bracket 24 of the adjacent support connector in the same support group 3 moves upward, and the other support bracket 24 moves downward, thereby causing the two support plates 31 in each support group 3 to move away from each other (i.e., move in opposite directions). Correspondingly, the output shafts of the two opening and closing motors 37 rotate in the forward direction, thereby driving the two gears 39 to rotate. Since each gear 39 meshes with the two racks 38, the support bracket 24 of the adjacent support connector in the same support group 3 moves downward, and the other support bracket 24 moves upward, thereby causing the two support plates 31 in each support group 3 to close together (i.e., move relative to each other).

[0054] In this embodiment, as Figure 1 As shown and as Figure 5 As shown, the sliding frame 1 can approach the platform 200 under the action of the sliding device, and connect the bag support device to the platform 200 for convenient subsequent operation.

[0055] After the aforementioned pushing mechanism pushes the material from the feeding conveyor into the packaging bag, the pushing mechanism transports the packaging bag containing the material to the platform 200. At this time, the two supporting groups 3 move closer to each other, and the two supporting plates 31 in the two supporting groups 3 move closer to each other, while the two folding plates 2 are in a state of moving away from each other. The specific working process of the bag folding device in the forming bag opening mechanism of this utility model is as follows:

[0056] The two support groups 3 and the two folding plates 2 move backward together under the drive of the sliding frame 1, so that the two support groups 3 enter the packaging bag and correspond to the bag opening. At the same time, the two folding plates 2 are respectively located on the left and right sides of the two packaging bags, and the folding surfaces of the two folding plates 2 facing each other correspond to the bag opening positions. Then, the two support groups 3 move away from each other, and the two support plates 31 in the two support groups 3 move away from each other, so that the four support plates 31 are respectively located at the four corners of the packaging bag to open the bag opening. During this process, the two folding plates 2 gradually close together, and the two folding plates 2 correspond to the middle positions of the left and right sides of the packaging bag. During the process of the two folding plates 2 closing together, the bag opening of the packaging bag is folded. After the packaging bag is folded, the clamping device clamps the bag opening. Then, the two folding plates 2 and the two support groups 3 move forward under the drive of the sliding frame 1 to leave the packaging bag and wait for the subsequent packaging bag containing materials to be pushed into the platform 200.

[0057] like Figure 5 As shown, the bottom of the frame 100 is equipped with a vertically arranged clamping bracket 61. Two parallel clamping slide rails 62 are mounted on the clamping bracket 61, both vertically arranged. Clamping sliders 63 are slidably mounted on each of the two clamping slide rails 62. One clamping slider 63 is fixedly mounted with an upper clamping plate 64, and the other clamping slider 63 is fixedly mounted with a lower clamping plate 65. In this embodiment, both the upper clamping plate 64 and the lower clamping plate 65 are n-shaped. The clamping portions 641 of the upper and lower clamping plates 64 and 65 are arranged opposite each other and are both longitudinally arranged, allowing the clamping portions for clamping the upper plate 64 and the lower plate 65 to cooperate with each other. The upper clamping plate 64 and the lower clamping plate 65 each span the platform 200, with their clamping portions 641 positioned at the front of the platform 200 to facilitate cooperation with the folding device. When the packaging bag is placed on the platform 200, the bag opening is located between the clamping portions 641 of the upper clamping plate 64 and the lower clamping plate 65. The upper clamping plate 64 and the lower clamping plate 65 move relative to or away from each other under the action of the clamping device described below, and the clamping portions 641 of the upper clamping plate 64 and the lower clamping plate 65 are both located within the range of the rearward movement of the two folding plates 2 and the two spreading groups 3.

[0058] Furthermore, the aforementioned bag-forming mechanism also includes a clamping and conveying device, which comprises the aforementioned clamping device. The clamping device includes a clamping opening and closing motor 66 and a fourth crank-connecting rod structure. The fourth crank-connecting rod structure includes a cross-shaped clamping connector 67 and two clamping connecting rods 68, with the first end, second end, third end, and fourth end sequentially in a clockwise direction from the clamping connector 67. The clamping opening and closing motor 66 is mounted on the clamping bracket 61, and the output shaft of the clamping opening and closing motor 66 is drively connected to the clamping connector 66. At the middle position of 7, both are installed using the same installation structure as described above; the first end of the first clamping link 68 is hinged to the first end of the clamping connector 67, the second end of the first clamping link 68 is hinged to the fourth end of the clamping connector 67 and the corresponding position of the clamping upper plate 64, the first end of the second clamping link 68 is hinged to the second end of the clamping connector 67, and the second end of the second clamping link 68 is hinged to the third end of the movable clamping connector 67 and the corresponding position of the clamping lower plate 65. Thus, when the clamping opening and closing motor 66 is working, its output shaft rotates in the forward direction, driving the clamping connector 67 to make a circular motion with its middle position as the base point, thereby causing the clamping parts 641 of the clamping upper plate 64 and the clamping lower plate 65 to move away from each other (i.e., move in opposite directions). Correspondingly, when the clamping opening and closing motor 66 is working, its output shaft rotates in the reverse direction, driving the clamping connector 67 to make a circular motion with its middle position as the base point, thereby causing the clamping parts 641 of the clamping upper plate 64 and the clamping lower plate 65 to close together (i.e., move relative to each other), thus facilitating the subsequent clamping of the bag opening of the packaging bag.

[0059] Furthermore, the aforementioned clamping and conveying device also includes a clamping moving device. A frame slide rail 71 is installed at the bottom of the frame 100. The frame slide rail 71 is arranged longitudinally, and a frame slider 72 is slidably installed on the frame support. Preferably, there are two frame slide rails 71 and two frame sliders 72. The two frame sliders 72 are jointly installed on the clamping plate. The clamping bracket 61 is fixedly installed on the clamping plate so as to be indirectly installed on the frame slider 72. The clamping bracket 61 slides longitudinally through the clamping moving device.

[0060] The clamping and moving device includes a clamping and moving motor 81 and a fifth crank-connecting rod structure. The fifth crank-connecting rod structure is the same as the aforementioned first crank-connecting rod structure, both including a clamping and moving crank 82 and a clamping and moving connecting rod 83 arranged longitudinally. The clamping and moving motor 82 is fixedly installed at the bottom of the frame 100, and the output shaft of the clamping and moving motor is driven to the right side of the clamping and moving crank 82. The right end of the clamping and moving connecting rod 83 is hinged to the right end of the clamping and moving crank 82, and the left end of the clamping and moving connecting rod 83 is hinged to the middle position of the clamping plate. Thus, when the clamping and moving motor 81 is working, when the clamping and moving crank 82 moves in a positive circular motion with the right end as the base point, it drives the clamping and moving connecting rod 83 to move. Due to the mutual cooperation of the frame slider 72 and the frame slide rail 71, the clamping bracket is limited to the longitudinal direction, so the clamping bracket slides to the left. As the clamping and moving crank 82 continues to rotate, it then drives the clamping bracket to slide to the right.

[0061] In this utility model, the frame 100 is provided with a clamping and conveying device and a sealing device for sealing the bag opening of the packaging bag from right to back at the platform 200. The sealing device can be a sealing device already used in bagging machines, such as a heat sealing device, which will not be described in detail here.

[0062] The specific working process of the bag folding device in the bag forming mechanism of this utility model is as follows: After the bag opening of the packaging bag is folded, the upper clamping plate and the lower clamping plate close together under the drive of the clamping device, so that the upper clamping plate and the lower clamping plate work together to clamp the folded part of the packaging bag. Then, under the action of the clamping moving device, it moves to the left to move to the sealing device for sealing. Then, under the action of the clamping device, the upper clamping plate and the lower clamping plate move away from each other and move back to the right, thereby completing the bag opening forming of the packaging bag.

[0063] This utility model discloses a bag forming mechanism for a bag-making machine. It adopts a motor and crank-connecting rod structure to drive the movement of various components. The structure is simple and convenient, and the drive source is stable. Therefore, the operation of folding packaging bags has good stability and accuracy. Furthermore, since the connecting rod in the crank-connecting rod structure is installed in a hinged manner, there is little contact between the mating components, which reduces the wear of each component, improves the service life of each component in this utility model, and eliminates the need for frequent maintenance.

[0064] The above description is only a preferred embodiment of this invention. All equivalent changes and modifications made within the scope of the claims of this utility model shall fall within the scope of the claims of this utility model.

Claims

1. A bag-forming opening mechanism for a bag-packing machine, mounted on a frame, wherein a platform for placing packaging bags is mounted on the frame; characterized in that: The device includes a bag-folding mechanism, comprising a sliding frame, an opening assembly for opening the bag opening, and two folding plates for folding the bag. The two folding plates are arranged in a mirror image. The opening assembly comprises two sets of mirror-arranged opening groups, each of which includes two opening plates arranged sequentially vertically. Each opening plate is L-shaped, and the two folding plates are located between the two opening plates in their respective opening groups. The frame is positioned laterally along the direction of approaching or away from the platform, and vertically along the direction perpendicular to the lateral direction. The sliding frame is mounted on the frame in a lateral sliding manner, and the sliding frame is equipped with an opening moving device, two opening and closing devices, and a folding plate opening and closing device. The two sets of opening groups move relative to each other or in opposite directions along the longitudinal direction via the opening moving device. The two opening plates in each set of opening groups move relative to each other or in opposite directions along the vertical direction via the opening and closing devices. The two folding plates move relative to each other or in opposite directions along the longitudinal direction via the folding plate opening and closing device.

2. The forming bag mouth mechanism of a bagging machine according to claim 1, characterized in that: The frame is equipped with two parallel frame slide rails, both of which are arranged laterally, and each of the two frame slide rails is slidably mounted with a frame slider. The bottom of the sliding frame is mounted on the two frame sliders. The sliding frame is equipped with a sliding device, which includes a sliding frame motor and a first crank-connecting rod structure. The first crank-connecting rod structure includes a frame crank and a frame connecting rod arranged laterally. The sliding frame motor is mounted on the frame, and the output shaft of the sliding frame motor is drivenly connected to the frame crank. One end of the frame connecting rod is movably connected to the frame crank, and the other end of the frame connecting rod is movably connected to the sliding frame.

3. The forming bag mouth mechanism of a bagging machine according to claim 2, characterized in that: Both of the aforementioned folding plates each have a folding plate mounting section and a folding bag section. The two folding plate mounting sections are respectively fixedly mounted on the folding plate bracket. The two folding plate brackets are respectively mounted on the sliding frame in a manner that allows them to slide relative to each other or back to back along the longitudinal direction. The two folding bag sections are respectively located between the two spreading plates in the corresponding spreading group.

4. The forming bag mouth mechanism of a bagging machine according to claim 3, characterized in that: The sliding frame is provided with a folding plate limiting slide rail and a main slide rail along the longitudinal direction. A folding plate limiting slider is installed on one of the folding plate brackets. The folding plate limiting slider is slidably engaged with the folding plate limiting slide rail. Folding plate sliders are installed on both folding plate brackets. Both folding plate sliders are slidably engaged with the main slide rail.

5. The forming bag mouth mechanism of a bagging machine according to claim 4, characterized in that: The folding plate opening and closing device includes a folding plate motor and a second crank connecting rod structure. The second crank connecting rod structure includes a Z-shaped folding plate connector and two folding plate connecting rods. The folding plate motor is mounted on the sliding frame, and the output shaft of the folding plate motor is driven to the middle position of the folding plate connector. One end of one of the folding plate connecting rods is movably connected to the first end of the folding plate connector, and the other end of the other folding plate connecting rod is movably connected to the adjacent first folding plate bracket. One end of the other folding plate connecting rod is movably connected to the second end of the folding plate connector, and the other end of the other folding plate connecting rod is movably connected to a folding plate linkage bracket. A folding plate linkage slider is mounted on the folding plate linkage bracket, and the folding plate linkage slider is slidably mounted on the main slide rail. The folding plate linkage bracket and the second folding plate bracket are connected together by a connecting plate.

6. The forming bag mouth mechanism of a bagging machine according to claim 4, characterized in that: Each of the aforementioned support plates includes a support section arranged laterally and a support mounting section arranged longitudinally. The support section on each of the aforementioned support plates is integrally connected to the support mounting section. Each of the aforementioned support mounting sections is respectively equipped with a support bracket. The two support brackets in each support group are jointly assembled on the support mounting plate. One side of each support mounting plate is equipped with a mounting plate slide rail arranged vertically, and the other side of each support mounting plate is equipped with a mounting plate slider. Each of the aforementioned support brackets is respectively equipped with a support slider that slides vertically. The two support sliders on the two support brackets in each support group are respectively slidably engaged with the two mounting plate slide rails on the same support mounting plate. The two mounting plate sliders are respectively slidably mounted on the main slide rail.

7. The forming bag mouth mechanism of a bagging machine according to claim 6, characterized in that: Each of the two expansion mounting plates is equipped with two mounting plate slide rails arranged vertically, and the two mounting plate slide rails on each expansion mounting plate are respectively slidably engaged with the corresponding expansion slider.

8. The forming bag mouth mechanism of a bagging machine according to claim 6, characterized in that: The spreading and moving device is located between the two spreading mounting plates, and includes a spreading and moving motor and a third crank-connecting rod structure. The third crank-connecting rod structure includes a Z-shaped spreading connector and two spreading connecting rods. The spreading and moving motor is mounted on the sliding frame, and the output shaft of the spreading and moving motor is driven to the middle position of the spreading connector. One end of one of the spreading connecting rods is movably connected to the first end of the spreading connector, the other end of one of the spreading connecting rods is movably connected to one of the spreading mounting plates, one end of the other spreading connecting rod is movably connected to the second end of the spreading connector, and the other end of the other spreading connecting rod is movably connected to the other spreading mounting plate.

9. The forming bag mouth mechanism of a bagging machine according to claim 8, characterized in that: Both opening and closing devices include an opening and closing motor and a gear and rack structure. In each opening and closing device, the gear and rack structure includes a gear and two oppositely arranged racks. The two racks are respectively fixedly installed on the lower part of the opening bracket provided in the same opening group. The opening and closing motor is installed on the opening mounting plate, and the output shaft of the opening and closing motor is drivenly connected to the gear. The gear is located between the two racks and meshes with the two racks. When the two opening plates in the same opening group are in a closed state, the upper end of the rack adjacent to the third crank connecting rod structure corresponds to the lower end of the other rack.

10. The forming bag mouth mechanism of a bagging machine according to any one of claims 1-9, characterized in that: The bottom of the frame is equipped with clamping brackets arranged vertically. Two clamping slide rails are arranged side by side on the clamping brackets. Clamping sliders are slidably installed on the two clamping slide rails. One clamping slider is fixedly equipped with an upper clamping plate, and the other clamping slider is fixedly equipped with a lower clamping plate. The clamping parts of the upper clamping plate and the lower clamping plate are arranged opposite to each other and are both arranged longitudinally. The upper clamping plate and the lower clamping plate move relative to each other or away from each other under the action of the clamping device, and the clamping parts of the upper clamping plate and the lower clamping plate are both within the movement range of the folding plate.

11. The forming bag mouth mechanism of a bagging machine according to claim 10, characterized in that: It also includes a clamping and conveying device, which includes the clamping device, which includes a clamping opening and closing motor and a fourth crank connecting rod structure. The fourth crank connecting rod structure includes a cross-shaped clamping connector and two clamping connecting rods, which are arranged clockwise as a first end, a second end, a third end, and a fourth end. The clamping opening and closing motor is mounted on the clamping bracket, and the output shaft of the clamping opening and closing motor is driven to the middle position of the clamping connector. One end of one clamping connecting rod is movably connected to the first end of the clamping connector, and the other end of one clamping connecting rod is movably connected to the fourth end of the clamping connector and a corresponding position of the upper clamping plate. One end of the other clamping connecting rod is movably connected to the second end of the clamping connector, and the other end of the other clamping connecting rod is movably connected to the third end of the clamping connector and a corresponding position of the lower clamping plate.

12. The forming bag mouth mechanism of a bagging machine according to claim 11, characterized in that: The clamping and conveying device further includes a clamping moving device. A frame slide rail is installed at the bottom of the frame, and a frame slider is slidably installed on the frame slide rail. The clamping bracket is installed on the frame slider, and the clamping bracket slides longitudinally via the clamping moving device. The clamping moving device includes a clamping moving motor and a fifth crank-connecting rod structure. The fifth crank-connecting rod structure includes a clamping moving crank and a clamping moving connecting rod arranged longitudinally. The clamping moving motor is installed at the bottom of the frame, and the output shaft of the clamping moving motor is drivenly connected to the clamping moving crank. One end of the clamping moving connecting rod is movably connected to the clamping moving crank, and the other end of the clamping moving connecting rod is movably connected to the clamping bracket.

Images