Packaging machine conveying module and conveying apparatus

Abstract

Disclosed are a packaging machine conveying module and a conveying apparatus. The packaging machine conveying module is arranged on a recirculating conveying mechanism. The packaging machine conveying module comprises a folding and unfolding linkage mechanism and comprises at least two holding units (1) which are arranged in parallel and are used for the placement of packaging bags. The folding and unfolding linkage mechanism synchronously adjusts the distance between a left holding part (11) and a right holding part (12) in each of the holding units to carry out bag unfolding and bag folding. In the described packaging machine conveying module, a parallel structure is adopted to achieve multi-station parallel conveyance for carrying out multi-station parallel packaging processing, effectively improving the overall production efficiency of packaging processing without excessively increasing the footprint; and a linkage structure is adopted to perform multi-station operations at the same time, facilitating control and providing high operation consistency.

Description

Packaging machine conveying module and conveying device

[0001] This application claims priority to the Chinese patent application filed with the Patent Office of China on September 28, 2023, with application number 202311284390.5 and invention name “A packaging machine conveying device and packaging machine”, and the Chinese patent application filed with the Patent Office of China on September 28, 2023, with application number: 202311284465.X and invention name “A packaging bag operation module for a packaging machine”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of packaging equipment, and in particular to a packaging machine conveying module and a conveying device. Background Art

[0003] A packaging machine typically stacks several bags of raw materials in a bag storage area. A bag-removing mechanism then automatically removes the bags one by one from the storage area. The machine then performs the following operations: bag opening, filling, sealing, and discharging, ultimately yielding a finished, sealed bag. Existing bag-feeding automatic packaging machines come in various configurations, but they typically employ a single-station, loop-feeding mechanism. This means they can only perform the opening, filling, sealing, and discharging operations on a single bag at a time, resulting in low efficiency. There are also packaging machines in the prior art that can operate on multiple packaging bags at the same time, but they are serial-type circulating conveying mechanisms, that is, several stations arranged along the conveying path direction of the circulating conveying mechanism are grouped together, and offline mechanisms such as bag loading mechanism, bag opening mechanism, loading mechanism, sealing mechanism, and discharging mechanism are arranged in sequence along the conveying direction of the circulating conveying mechanism. These offline mechanisms all include multiple processing stations arranged along the conveying direction of the circulating conveying mechanism. Although this structure can theoretically carry out packaging processing of multiple packaging bags at the same time, it will cause the overall loop stroke of the circulating conveying mechanism to be too long, the structure is complex, and it occupies too much site space. Each packaging bag actually needs to cross the stroke length covered by multiple stations to travel to the location of the next offline mechanism for the next packaging processing step, which will result in a large proportion of the travel time. Therefore, the actual efficiency is low, and efficient and stable packaging production cannot be achieved.

[0004] Summary of the Invention

[0005] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology and provide a packaging machine conveying module and conveying device to solve the problem that the packaging machine in the current technology has a complex structure, occupies too much site space, and is difficult to achieve efficient and stable packaging production.

[0006] In order to solve the above technical problems, the technical solution of the present invention is:

[0007] A packaging machine conveying module includes a module base, on which is provided an expansion and contraction linkage mechanism and at least two holding units arranged in parallel for placing packaging bags. The holding units include a left holding component and a right holding component for engaging with the sides of the packaging bags. The left holding component and the right holding component can move relative to each other. The expansion and contraction linkage mechanism is used to make the left holding component and the right holding component move relative to each other to drive all the holding units to switch synchronously between the bag expansion posture and the bag contraction posture. The distance between the left holding component and the right holding component in the bag expansion posture is greater than the distance between the two in the bag contraction posture. The packaging machine conveying module described in the present invention is provided with multiple holding units arranged in parallel, which perform various packaging processing steps on multiple packaging bags at the same time in a parallel state, effectively improving the overall packaging processing production efficiency. Compared with the existing serial multi-station packaging processing method, the present application adopts a parallel multi-station packaging processing method. The holding units on the packaging machine conveying module of the present invention are not arranged along the conveying direction of the circular conveying mechanism. Increasing the number of holding units arranged in parallel in the packaging machine conveying module will not lead to an increase in the loop stroke length of the circular conveying mechanism of the packaging machine, that is, the circular conveying mechanism can maintain a relatively short loop stroke length, thereby maintaining the compactness of the equipment structure while increasing the number of parallel processing, and will not excessively increase the volume of the overall equipment. The operating efficiency is higher, and the dynamic and static time ratio during packaging processing is more reasonable, which better improves production efficiency and realizes efficient and stable packaging production. In addition, the holding units on the packaging machine conveying module adopted in the present invention perform synchronous actions under the drive of the expansion and contraction linkage mechanism, and the structure has high integration, is more compact, and reduces the occupied volume. When the holding unit is in the bag-expanding posture, the packaging bag is flattened and straightened. When the holding unit is in the bag-shrinking posture, the two sides of the packaging bag are close to each other to make the packaging bag in a relaxed state, thereby facilitating the opening of the packaging bag. The packaging processing steps such as bagging, filling, and sealing have different requirements for the posture of the packaging bag. The expansion and contraction linkage mechanism drives all the holding units to switch their postures synchronously to ensure the stability and processing quality of each packaging processing step.

[0008] Furthermore, the module base is provided with a bag width adjustment mechanism, which is associated with at least one of the left and right retaining components to synchronously adjust the spacing between the left and right retaining components of each retaining unit to accommodate packaging bags of different sizes. The bag expansion and contraction required in the packaging process simply involves slightly adjusting the spacing between the clamps holding the two sides of the bag, thereby straightening or relaxing the bag. Existing packaging machines are typically only suitable for packaging bags of a single size. When the size of the bag changes, traditional packaging machines can only perform bag expansion and contraction. The spacing between the clamps can only be slightly adjusted for a single size of bag, making it impossible to switch the bag between the straightened and relaxed states after the size change, thus failing to meet the needs of packaging processing. The packaging machine conveying module in the present invention not only uses the expansion and contraction linkage mechanism to synchronously adjust the distance between the left holding component and the right holding component to perform bag expansion and bag contraction actions, but also uses the bag width adjustment mechanism to adjust the distance between the left holding component and the right holding component over a large range to adapt to packaging bags of different sizes and specifications, and the bag width adjustment mechanism does not interfere with the action of the expansion and contraction linkage mechanism. That is, after the bag width adjustment mechanism adjusts the bag width, the expansion and contraction linkage mechanism can still reliably and normally adjust the distance between the left holding component and the right holding component by a small range, thereby ensuring that stable and reliable packaging processing can be carried out when matching packaging bags of different sizes and specifications.

[0009] Furthermore, the bag width adjustment mechanism is associated with the expansion and contraction linkage mechanism, and the bag width adjustment mechanism is associated with at least one of the left holding component and the right holding component through the expansion and contraction linkage mechanism, and the structure is more compact and streamlined. The expansion and contraction linkage mechanism is an adjustment mechanism for adjusting the distance between the left holding component and the right holding component. After the bag width adjustment mechanism is associated with the expansion and contraction linkage mechanism, the bag width adjustment mechanism adjusts the state of the expansion and contraction linkage mechanism, and then indirectly uses the expansion and contraction linkage mechanism to adjust the distance between the left holding component and the right holding component to adapt to packaging bags of different sizes. The bag width adjustment mechanism is organically combined with the expansion and contraction linkage mechanism, and the bag width adjustment mechanism does not need to be set with too many linkage mechanisms to be associated with at least one of the left holding component and the right holding component. The structure is more compact and streamlined, and the implementation is more convenient and the cost is low.

[0010] Furthermore, the bag width adjustment mechanism includes a limit piece and an elastic component, the limit piece being adjustably connected to the module base of the packaging machine conveying module, the elastic component acting on the expansion and contraction control component of the expansion and contraction linkage mechanism so that the expansion and contraction control component elastically rests against the limit piece, and the bag width adjustment mechanism unilaterally limits the expansion and contraction control component of the expansion and contraction linkage mechanism, and when the limit piece is adjusted, the expansion and contraction control component is driven to move, and then the expansion and contraction linkage mechanism changes the distance between the left holding component and the right holding component, thereby achieving adaptation to packaging bags of different sizes and specifications. At the same time, the bag width adjustment mechanism also maintains that the expansion and contraction control component of the expansion and contraction linkage mechanism has an elastic activity space, and the expansion and contraction control component can move by overcoming the elastic component under the drive of the expansion and contraction drive mechanism, that is, after the bag width is adjusted, the expansion and contraction linkage mechanism can also slightly adjust the distance between the left holding component and the right holding component under the drive of the expansion and contraction drive mechanism, thereby achieving bag expansion and bag contraction actions, so that normal packaging processing can be carried out when matching packaging bags of different sizes and specifications.

[0011] Furthermore, the extension and retraction linkage mechanism includes an extension and retraction linkage rod and an extension and retraction control member. The extension and retraction linkage rod extends along the arrangement direction of the retaining units and is associated with at least one of the left retaining component and the right retaining component. The extension and retraction control member is in transmission connection with the extension and retraction linkage rod to drive the extension and retraction linkage rod to rotate about its own axis or move along its own axis to drive relative movement between the left and right retaining components. The structure is simple, compact, and easy to implement. The extension and retraction linkage rod can be associated with at least one of the left and right retaining components through various connection methods. When the extension and retraction linkage rod rotates or moves axially, it drives at least one of the left and right retaining components to move for adjustment.

[0012] Furthermore, the telescopic linkage rod is provided with a threaded segment 1 and a threaded segment 2, the threaded segment 1 and the threaded segment 2 having opposite thread rotation directions, the left retaining component is assembled on the threaded segment 1, and the right retaining component is assembled on the threaded segment 2, and the telescopic linkage rod rotates about its own axis so that the left retaining component and the right retaining component move in opposite directions in the axial direction of the telescopic linkage rod;

[0013] Alternatively, the retractable linkage rod comprises a linkage rod 1 and a linkage rod 2 which are parallel to each other, the linkage rod 1 being connected to the left holding component, the linkage rod 2 being connected to the right holding component, the left holding component being in sliding engagement with the linkage rod 2, the right holding component being in sliding engagement with the linkage rod 1, and the linkage rod 1 and the linkage rod 2 moving in opposite directions along the axial direction;

[0014] Alternatively, the extension and retraction linkage rod is provided with a pushing portion, which pushes one of the left holding component and the right holding component to move when the extension and retraction linkage rod rotates around its own axis or moves along the axial direction. The structure is simple, easy to implement, convenient to adjust, and has good stability.

[0015] Furthermore, the first and second linkage rods are connected by a reverse linkage mechanism. When one of the first and second linkage rods moves axially, the reverse linkage mechanism drives the other to move in the opposite direction. Only one of the first and second linkage rods needs to be driven, which simplifies the extension and retraction drive mechanism, requiring only a single drive mechanism, reducing design complexity and improving structural compactness.

[0016] Furthermore, the reverse linkage mechanism includes a rack 1, a rack 2 and a gear 1, the linkage rod 1 is connected to the rack 1, the linkage rod 2 is connected to the rack 2, the length direction of the rack 1 and the rack 2 is along the axis direction of the linkage rod 1 and the linkage rod 2, the rack 1 and the rack 2 are arranged in parallel and spaced apart, and the gear 1 is arranged between the rack 1 and the rack 2 and meshes with both of them respectively;

[0017] Alternatively, the reverse linkage mechanism includes a lever, the middle portion of which is rotatably connected to the module base of the packaging machine's conveying module. One end of the lever is transmission-connected to linkage lever 1 via a slotted pin assembly, and the other end of the lever is transmission-connected to linkage lever 2 via a slotted pin assembly. This structure is simple and compact, occupies little space, is easy to implement, and has high linkage reliability.

[0018] Furthermore, the expansion and contraction control member includes an expansion and contraction control rack and an expansion and contraction control gear. The expansion and contraction control rack is slidably mounted on the module base of the packaging machine conveying module, and the expansion and contraction control gear is rotatably mounted on the module base. The expansion and contraction control rack meshes with the expansion and contraction control gear for transmission. The expansion and contraction control gear is transmission-connected to the expansion and contraction linkage rod to drive the expansion and contraction linkage rod to rotate about its own axis or move along its own axis. The expansion and contraction control rack can be conveniently coordinated with the expansion and contraction drive mechanism. Regardless of whether the expansion and contraction drive mechanism adopts a power actuation mechanism or a guide member, the expansion and contraction control rack can be conveniently and reliably driven to move. The linear motion of the expansion and contraction control rack is converted into rotational motion of the expansion and contraction control gear through the meshing transmission connection between the expansion and contraction control rack and the expansion and contraction control gear. The rotating expansion and contraction control gear then drives the expansion and contraction linkage rod to move. The connection structure between the expansion and contraction control gear and the expansion and contraction linkage rod is specifically and flexibly configured according to the required movement mode of the expansion and contraction linkage rod.

[0019] Furthermore, it also includes a limiter and an elastic component, wherein the limiter is adjustably connected to the module base of the packaging machine conveying module in the sliding direction of the expansion and contraction control rack, and an elastic component is arranged between the expansion and contraction control rack and the module base, and the elastic component makes the expansion and contraction control rack elastically rest against the limiter, and the limiter limits the expansion and contraction control component of the expansion and contraction linkage mechanism on one side, and when the limiter is adjusted, the expansion and contraction control component is driven to move, and then the expansion and contraction linkage mechanism changes the distance between the left holding component and the right holding component, thereby achieving adaptation to packaging bags of different sizes and specifications. At the same time, the expansion and contraction control component of the expansion and contraction linkage mechanism has an elastic activity space, and the expansion and contraction control component can move by overcoming the elastic component under the drive of the expansion and contraction drive mechanism, that is, after the bag width is adjusted, the expansion and contraction linkage mechanism can also slightly adjust the distance between the left holding component and the right holding component under the drive of the expansion and contraction drive mechanism, thereby achieving bag expansion and bag contraction actions, so that normal packaging processing can be carried out when matching packaging bags of different sizes and specifications.

[0020] Furthermore, the left holding component and the right holding component are clamps, which fix the packaging bag in a clamping manner, have good fixing stability, ensure that the packaging bag is always in a controlled state during the packaging process, and improve the reliability of the packaging process. A clamping linkage mechanism is provided on the packaging machine conveying module, and the clamping linkage mechanism drives the left holding component and the right holding component of all holding units to switch between the open clamp state and the closed clamp state synchronously. When loading the bag, the clamp needs to switch to the open clamp state to receive the incoming packaging bag, and then switch to the closed clamp state to stably clamp the packaging bag. When unloading, the clamp also needs to switch to the open clamp state to release the packaging bag after the packaging process is completed. The clamping linkage mechanism is integrated on the packaging machine conveying module, with high integration and a linkage structure. It has a compact structure, occupies little space, is more convenient to drive, and only requires one driving mechanism, which reduces the design difficulty and occupancy of the driving mechanism, and effectively ensures the consistency of the holding unit action. The clamping linkage mechanism includes a clamping linkage rod extending along the arrangement direction of the holding units. The clamping linkage rod is provided with an actuating portion associated with the left and right holding components. The clamping linkage rod rotates about its own axis or moves along its axis, thereby driving the left and right holding components to switch synchronously between an open and closed state. The structure is simple, easy to implement, compact, and space-saving, while also providing high linkage reliability.

[0021] Furthermore, the module base is also provided with a scraper mechanism. During the packaging process, there may be situations where the packaging bag fails to be placed on the holding unit, falls off the holding unit, or leaks during filling. If the packaging bag or material falls into the packaging machine, it will affect the normal operation of the packaging machine. The scraper mechanism provided on the module base can scrape and remove the packaging bag and material during the movement of the packaging machine conveyor module, ensuring the cleanliness of the equipment and realizing the centralized recovery and reuse of the leaked material.

[0022] Furthermore, the scraper mechanism includes a fixed body and a sliding body, wherein the fixed body is connected to the module base, and the sliding body is slidably connected to the fixed body;

[0023] When the packaging machine conveying module is in a preset positive posture, the sliding body automatically slides relative to the fixed body to switch to an expanded state; when the packaging machine conveying module is in a preset negative posture, the sliding body automatically slides relative to the fixed body to switch to a recovered state.

[0024] The scraper mechanism is a telescopic structure that can be recovered and unfolded. When the packaging machine conveying module is in a preset positive posture, the scraper mechanism is in an unfolded state, thereby reliably realizing the cleaning function and the centralized recovery of leaked materials. When the packaging machine conveying module is in a preset negative posture, the scraper mechanism is retracted to reduce the occupied space and avoid interference between the packaging machine conveying module and the packaging machine during movement. The structure is highly compact, which is conducive to improving the overall compactness of the packaging machine and reducing the volume of the equipment.

[0025] A packaging machine conveying device includes the above-mentioned packaging machine conveying module and also includes a circulating conveying mechanism, wherein the packaging machine conveying module is arranged on the circulating conveying mechanism so as to be driven thereby to circulate, and a retracting drive mechanism for driving the retracting linkage mechanism to operate is arranged next to the circulating conveying mechanism. The packaging machine conveying device described in the present invention has a compact structure and occupies a small volume, realizes multi-station parallel conveying to perform multi-station parallel packaging processing, effectively improves packaging processing efficiency, and realizes efficient and stable packaging production. The retracting drive mechanism arranged next to the circulating conveying mechanism drives the retracting linkage mechanism to synchronize the operation of all holding units. The structure is compact and highly integrated, which can reduce the design difficulty and complexity of the retracting drive mechanism, making the retracting drive mechanism more streamlined and compact, and ensuring that the packaging bags placed on the packaging machine conveying module can be expanded and retracted efficiently and in a consistent manner.

[0026] Furthermore, the expansion and contraction drive mechanism includes one or a combination of a power actuator and a guide member provided along the conveying path of the circulating conveying mechanism. The power actuator refers to a mechanism capable of performing an action, and may be a mechanism driven by a motor, a cylinder, or the like. The power actuator actively performs an action to drive the expansion and contraction linkage mechanism to move, thereby driving the holding unit to synchronously switch between the bag expansion posture and the bag contraction posture. The power actuator can move in a linear manner, rotate, swing, or other action modes. The guide member has a variable guide path. The packaging machine conveying module moves under the drive of the circulating conveying mechanism. The path shape structure of the guide member is designed to automatically drive the expansion and contraction linkage mechanism to move during the movement of the packaging machine conveying module. The guide member is a static component and does not require a power source, which is energy-saving and has high drive reliability.

[0027] Furthermore, the power actuation mechanism includes a toggle member and a power assembly, wherein the toggle member is adjustably connected to the power assembly and is driven to move thereby;

[0028] The shifting member includes two shifting rods spaced apart and parallel to the conveying direction of the circulating conveying mechanism;

[0029] The toggle member includes a clamping hoop portion, and the power assembly includes a pull rod. The clamping hoop portion is adjustably connected to the pull rod, which has a simple structure and is easy to adjust. After adjustment, the connection stability can be guaranteed, and the accuracy of driving the extension and retraction linkage mechanism to perform the action can be guaranteed;

[0030] The guide component includes one of a guide rail and a guide groove, and the guide component is adjustably arranged next to the circulating conveying mechanism.

[0031] The structure is simple and easy to implement. The toggle member can reliably drive the expansion and contraction linkage mechanism to move, and does not hinder the movement of the packaging machine conveying module under the drive of the circular conveying mechanism. In addition, the power actuating mechanism and the guide component adopt an adjustable structure, which can be adaptively adjusted in conjunction with the expansion and contraction linkage mechanism, thereby increasing the applicability of the packaging machine.

[0032] Furthermore, the circular conveyor mechanism includes two parallel guide rails forming a circular path. The packaging machine conveyor module is slidably connected to the guide rails. The conveyor drive mechanism of the circular conveyor mechanism drives the packaging machine conveyor module to intermittently move along the guide rails. This simple structure and excellent stability are achieved by the dual guide rails stably supporting the packaging machine conveyor module, ensuring the stability and accuracy of the packaging machine conveyor module during movement, thereby ensuring the stability and efficiency of the packaging process.

[0033] Furthermore, the module base includes two spaced-apart support plates, each slidably connected to a guide rail. The expansion and contraction linkage mechanism and the parallel-arranged holding units are positioned between the two support plates. This streamlined and compact structure facilitates the placement of the parallel-arranged holding units between the two support plates, with the parallel arrangement of the holding units perpendicular to the conveying direction of the loop conveyor mechanism. The packaging machine's conveyor module is supported on the guide rails at both ends by the support plates for conveying. The holding units are suspended between the two support plates, preventing interference with the loop conveyor mechanism and facilitating various packaging processes.

[0034] Furthermore, the guide rail includes an arc segment and a straight segment. The support plate is provided with a sliding portion that cooperates with the guide rail. The sliding portion includes a first guide wheel and a second guide wheel. The guide rail is clamped between the first guide wheel and the second guide wheel. The first guide wheel and the second guide wheel each include two guide wheels. When the sliding portion is in the arc segment and the straight segment of the guide rail, the first guide wheel and the second guide wheel both roll in contact with the guide rail. This ensures that the packaging machine conveying module can smoothly and quickly move in both arc segments and straight segments, ensuring stable and efficient operation of the packaging machine.

[0035] A packaging machine includes the aforementioned packaging machine conveyor device and several operating mechanisms for performing different packaging processing steps. The operating mechanisms are respectively disposed at predetermined workstations along the conveying path of the packaging machine conveyor device. Each operating mechanism includes the same number of operating units as the holding units in the packaging machine conveyor module, enabling multi-station packaging processing, effectively improving packaging processing efficiency, and achieving efficient and stable packaging production.

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] The packaging machine conveying module and conveying device described in the present invention adopt a parallel structure to realize multi-station parallel conveying for multi-station parallel packaging processing, effectively improving the overall packaging processing production efficiency, and while improving efficiency, it will not increase the occupied space too much. It has a compact structure and adopts a linkage control structure, which is easy to control, has high consistency of action, is simple in structure, and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a side view schematic diagram of a conveying device for a packaging machine according to the present invention;

[0039] FIG2 is a schematic diagram of the three-dimensional structure of FIG1 ;

[0040] FIG3 is a schematic diagram of the top view of a conveying module of a packaging machine;

[0041] FIG4 is a schematic diagram of the three-dimensional structure of the conveying module of the packaging machine shown in FIG3 ;

[0042] FIG5 is a schematic diagram of a partial structure of FIG4;

[0043] FIG6 is a schematic structural diagram of a left retaining component;

[0044] FIG7 is a schematic cross-sectional view of the left retaining member shown in FIG6 ;

[0045] FIG8 is a schematic diagram of the structure of the support plate and the guide rail of the packaging machine conveying module;

[0046] FIG9 is a schematic structural diagram of an expansion and contraction drive mechanism;

[0047] FIG10 is a schematic structural diagram of another packaging machine conveying module;

[0048] FIG11 is a schematic diagram of a partial structure of FIG10;

[0049] FIG12 is a schematic structural diagram of the reverse linkage mechanism of the conveying module of the packaging machine shown in FIG10;

[0050] FIG13 is a schematic structural diagram of another packaging machine conveying module;

[0051] FIG14 is a schematic diagram of a partial structure of FIG13;

[0052] FIG15 is a schematic diagram of a partial bottom structure of FIG13;

[0053] FIG16 is a schematic structural diagram of the left holding component in FIG13;

[0054] FIG17 is a schematic cross-sectional view of the structure of FIG15 ;

[0055] FIG18 is a schematic diagram of a partial structure of another packaging machine conveying module;

[0056] FIG19 is a schematic structural diagram of another packaging machine conveying module;

[0057] FIG20 is a schematic structural diagram of a hidden housing of a conveying module of the packaging machine shown in FIG19 ;

[0058] FIG21 is a schematic structural diagram of another packaging machine conveying module;

[0059] FIG22 is a schematic structural diagram of a hidden housing of a conveying module of the packaging machine shown in FIG21 ;

[0060] FIG23 is a schematic structural diagram of the clamping portion 1 and the clamping portion 2 in FIG20 ;

[0061] FIG24 is a schematic structural diagram of the clamping portion 1 and the clamping portion 2 in FIG22 ;

[0062] FIG25 is a schematic structural diagram of another packaging machine conveying module;

[0063] FIG26 is a schematic structural diagram of another packaging machine conveying module;

[0064] Figure 27 is a schematic structural diagram of a packaging machine;

[0065] FIG28 is a schematic side view of the structure of a packaging machine conveying module in a normal posture;

[0066] FIG29 is a side view schematic diagram of the structure of a packaging machine conveying module in a reverse posture.

[0067] In the figure: Circular conveying mechanism 200, guide rail 201, first guide wheel 2021, second guide wheel 2022, packaging machine conveying module 100, module base 101, receiving position 102, support plate 103, holding unit 1, left holding component 11, right holding component 12, clamp body 111, clamp sub-body 112, clamp elastic member 113, roller 114, clamping plate 115, clamping plate 2 116, clamping part 1 117, clamping part 2 118, clamping body 119, clamping elastic member 1191, clamping sub-part 1192, gear part 13, expansion and contraction linkage rod 2, threaded segment 1 21, threaded segment 2 22, pushing part 23, linkage rod 1 24, linkage rod 2 25, expansion and contraction threaded segment 26, rack 1 31, gear Strip 2 32, gear 1 33, toggle rod 34, extension and retraction control rack 41, extension and retraction control gear 42, pushing part 43, limiter 51, elastic member 52, bag width linkage rod 53, bag width threaded section 54, connecting block 55, clamping linkage rod 61, actuating part 62, swing arm member 621, push rod 622, first guide wheel 2021, second guide wheel 2022, extension and retraction drive mechanism 300, power actuating mechanism 301, toggle member 3011, power assembly 3012, clamping hoop part 3013, guide member 302, bag loading mechanism 401, bag opening mechanism 402, filling mechanism 403, sealing mechanism 404, discharging mechanism 405, scraper mechanism 71, fixed body 711, sliding body 712, baffle 72. DETAILED DESCRIPTION

[0068] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0069] The embodiments of the present invention disclose a packaging machine conveying module, a packaging machine conveying device and a packaging machine, which adopt a parallel multi-station structure to increase the number of packaging processes per unit time, effectively improve the production efficiency of packaging processing, and realize efficient and stable packaging production.

[0070] As shown in Figures 1 and 2, a packaging machine conveying device mainly includes a circular conveying mechanism 200 and a packaging machine conveying module 100. The packaging machine conveying module 100 is mounted on the circular conveying mechanism 200 and driven by the circular conveying mechanism 200 to travel along the circular loop of the circular conveying mechanism 200. The packaging machine conveying module 100 includes a module base 101, on which are disposed at least two holding units 1 arranged in parallel for placing packaging bags. The specific number of holding units 1 can be set according to actual needs. In the multi-station packaging machine used in the prior art, the workstations are arranged along the conveying path of the circular conveying mechanism, and several of the workstations form a group. The offline mechanism for performing the packaging process includes multiple mechanism units arranged along the conveying direction of the circular conveying mechanism. This structure is actually a series structure. The greater the number of parallel workstations, the longer the conveying path of the circular conveying mechanism, which significantly increases the occupied space of the packaging machine. The "holding units 1 are arranged in parallel" described in this embodiment means that the holding units 1 are arranged in parallel with the circular conveying mechanism 200. It can be understood that the holding units 1 in the packaging machine conveying module 100 are arranged in a direction perpendicular to the conveying path of the circular conveying mechanism 200, and the packaging machine conveying module 100 as a whole only occupies a single point on the conveying path of the circular conveying mechanism 200. No matter how the number of holding units 1 in the packaging machine conveying module 100 increases or decreases, the packaging machine conveying module 100 only occupies a single point. Therefore, the increase or decrease in the number of holding units 1 in the packaging machine conveying module 100 does not affect the length of the conveying path of the circular conveying mechanism 200. While improving the packaging production efficiency, it will not increase the occupied space too much, and the structure is compact.

[0071] More specifically, as shown in Figures 1 to 5, the holding unit 1 includes a left holding component 11 and a right holding component 12 for engaging with the sides of the packaging bag, that is, the left holding component 11 engages with the left side of the packaging bag, and the right holding component 12 engages with the right side of the packaging bag, thereby keeping the packaging bag fixed on the packaging machine conveying module 100, so that the packaging bag is in a controlled state and ensures the reliability of the packaging processing procedure. Furthermore, the left holding component 11 and the right holding component 12 can move relative to each other. Usually, the packaging bags are stacked in the bag compartment in a stacked state. The packaging bags are taken out from the bag compartment one by one and loaded onto the holding unit 1. The two sides of the packaging bag are respectively engaged with the left holding component 11 and the right holding component 12. At this time, the packaging bag is usually still in a flat state. Subsequently, the packaging bag needs to be opened, filled, sealed and other packaging processes. Opening and filling require the mouth of the packaging bag to be opened, so the distance between the two sides of the packaging bag must be reduced. When sealing, the mouth of the packaging bag needs to be in a straightened and flat state to ensure the flatness and sealing of the seal. Therefore, the packaging bag placed on the holding unit 1 needs to be in different postures for different packaging processing steps. Because the left and right retaining members 11, 12 are movable relative to each other, the distance between them can be adjusted by moving them relative to each other, thereby adjusting the distance between the two sides of the retained packaging bag. This allows the packaging bag to switch between a straightened state and a relaxed state to meet the requirements of various packaging processing steps. A retractable linkage mechanism is also provided on the module base 101. A retractable drive mechanism is provided adjacent to the circulating conveyor mechanism 200 for driving the retractable linkage mechanism. The retractable linkage mechanism drives all retaining units 1 to synchronously switch between an expanded and a collapsed position. When in the expanded position, the distance between the left and right retaining members 11, 12 in a retaining unit 1 is greater than the distance between the left and right retaining members 11, 12 in the collapsed position. The distance between the left and right retaining members 11, 12 refers specifically to the distance between the junction of the left retaining member 11 and the left side of the packaging bag and the junction of the right retaining member 12 and the right side of the packaging bag.Specifically, when in the bag-expanding posture, the distance between the left holding component 11 and the right holding component 12 of each holding unit 1 is the bag-expanding distance, and when in the bag-shrinking posture, the distance between the left holding component 11 and the right holding component 12 of each holding unit 1 is the bag-shrinking distance. The bag-shrinking distance is smaller than the bag-expanding distance. The expansion-contraction linkage mechanism drives the distance between the left holding component 11 and the right holding component 12 to change slightly so that the packaging bag can switch between the straightened state and the relaxed state. This embodiment adopts a linkage structure, which is conducive to simplifying the expansion-contraction drive mechanism. Only a single expansion-contraction drive mechanism is needed to drive all the holding units 1 to switch postures through the expansion-contraction linkage mechanism, thereby improving the consistency of movement and ensuring the stability and processing quality of each packaging processing step. In addition, the structure is compact, which is conducive to reducing the volume of the equipment.

[0072] The expansion and contraction linkage mechanism includes an expansion and contraction linkage rod 2 and an expansion and contraction control component. The expansion and contraction linkage rod 2 extends along the arrangement direction of the holding unit 1. The expansion and contraction linkage rod 2 is associated with at least one of the left holding component 11 and the right holding component 12. Associated means that there is a direct connection, indirect connection, transmission connection relationship, etc. The expansion and contraction control component is transmission-connected with the expansion and contraction linkage rod 2, and the expansion and contraction control component cooperates with the expansion and contraction drive mechanism 300. The expansion and contraction control component moves under the drive of the expansion and contraction drive mechanism 300, and then the expansion and contraction control component drives the expansion and contraction linkage rod 2 to adjust the distance between the left holding component 11 and the right holding component 12 by rotating around its own axis or moving along its own axis, thereby finally realizing the switching of the packaging bag between the straightened state and the relaxed state.

[0073] Specifically, in an embodiment shown in Figures 3 to 5, the left holding component 11 and the right holding component 12 are both slidably adjustable in the arrangement direction of the holding unit 1, the retractable linkage rod 2 is a long rod along the arrangement direction of the holding unit 1, the retractable linkage rod 2 is rotatably connected to the module base 101 of the packaging machine conveying module 100, the retractable linkage rod 2 is provided with a threaded segment 1 21 and a threaded segment 2 22, the threaded direction of the threaded segment 1 21 and the threaded segment 2 22 are opposite, the left holding component 11 is assembled on the threaded segment 1 21, and the right holding component 12 is assembled on the threaded segment 22, the left holding component 11 and the threaded segment 1 21 cooperate to form a screw substructure, and the right holding component 12 and the threaded segment 2 22 cooperate to form a screw substructure. If multiple retaining units 1 are arranged in parallel, then multiple groups of threaded segments 1 21 and threaded segments 2 22 are provided to correspond one to one with the retaining units 1. The telescopic linkage rod 2 rotates around its own axial direction so that the left retaining component 11 and the right retaining component 12 move in opposite directions in the axial direction of the telescopic linkage rod 2 to adjust the spacing. In order to ensure that the left retaining component 11 and the right retaining component 12 can move reliably when the telescopic linkage rod 2 rotates, a guide rod parallel to the telescopic linkage rod 2 is also provided. The left retaining component 11 and the right retaining component 12 are slidingly connected to the guide rod, and the guide rod is used to guide and limit the left retaining component 11 and the right retaining component 12 to ensure that the left retaining component 11 and the right retaining component 12 can accurately move axially when the telescopic linkage rod 2 rotates.

[0074] Furthermore, the expansion and contraction control component includes an expansion and contraction control rack 41 and an expansion and contraction control gear 42. The expansion and contraction control rack 41 is slidably set on the module base 101 of the packaging machine conveying module 100, and the expansion and contraction control gear 42 is rotatably set on the module base 101. The expansion and contraction control rack 41 is meshed with the expansion and contraction control gear 42 for transmission. The expansion and contraction control rack 41 cooperates with the expansion and contraction drive mechanism 300 and is driven by it. The expansion and contraction control gear 42 is transmission-connected to the expansion and contraction linkage rod 2 to drive the expansion and contraction linkage rod 2 to rotate around its own axis. Specifically, the expansion and contraction control gear 42 is directly connected to the expansion and contraction linkage rod 2, so that the rotation axis of the expansion and contraction control gear 42 is along the axial direction of the expansion and contraction linkage rod 2. The sliding direction of the expansion and contraction control rack 41 is perpendicular to the axial direction of the expansion and contraction linkage rod 2. Preferably, the sliding direction of the expansion and contraction control rack 41 is perpendicular to the conveying direction of the circulating conveying mechanism 200, which is convenient for setting up the expansion and contraction drive mechanism. The expansion and contraction control rack 41 is provided with a control part for cooperating with the expansion and contraction drive mechanism. The expansion and contraction drive mechanism drives the expansion and contraction control rack 41 to slide, and then the expansion and contraction control rack 41 drives the expansion and contraction control gear 42 to rotate, and then the expansion and contraction linkage rod 2 rotates, so that the left holding component 11 and the right holding component 12 move in opposite directions to adjust the distance between the two, that is, the holding unit 1 is switched between the bag expansion posture and the bag contraction posture. The structure is simple and easy to implement.

[0075] The cooperation between the expansion and contraction drive mechanism and the expansion and contraction linkage mechanism enables the holding unit 1 to switch between the bag expansion posture and the bag contraction posture. In other words, the cooperation between the expansion and contraction drive mechanism and the expansion and contraction linkage mechanism only causes a small change in the distance between the left holding component 11 and the right holding component 12, so that the bag expansion and bag contraction actions can only be performed for packaging bags of a single size. In order to broaden the scope of application of the packaging machine and to be applicable to packaging bags of different sizes, a bag width adjustment mechanism is also provided on the module base 101 of the packaging machine conveying module 100. The bag width adjustment mechanism is associated with at least one of the left holding component 11 and the right holding component 12 to synchronously adjust the distance between the left holding component 11 and the right holding component 12 of each holding unit 1 to adapt to packaging bags of different sizes. The bag width adjustment mechanism is used to adjust the distance between the left holding component 11 and the right holding component 12 over a large range to adapt to packaging bags of different sizes. The bag width adjustment mechanism does not interfere with the action of the expansion and contraction linkage mechanism, that is, after the bag width adjustment mechanism adjusts the bag width, the expansion and contraction linkage mechanism can still reliably and normally make small adjustments to the distance between the left holding component 11 and the right holding component 12, thereby ensuring stable and reliable packaging processing when matching packaging bags of different sizes. For example, if the width of the original matching packaging bag is 10cm, the distance between the left holding component and the right holding component is 10cm, which is the bag expansion distance; the distance between the left holding component and the right holding component is 8cm, which is the bag contraction distance. In other words, the expansion and contraction linkage mechanism drives the left holding component and the right holding component to switch between the intervals of 10cm to 8cm. When replacing the packaging bag with a width of 15cm, the maximum distance between the left holding component and the right holding component can only be 10cm, and the packaging bag with a width of 15cm cannot be straightened, which seriously affects the packaging processing steps of bagging and sealing. For the packaging bag with a width of 15cm, the left holding component and the right holding component need to switch between the intervals of 15cm to 13cm, and then the basic distance between the left holding component and the right holding component needs to be adjusted, and then the expansion and contraction linkage mechanism is used to drive the left holding component and the right holding component to switch their postures.

[0076] As shown in Figures 4 and 5, an embodiment of the bag width adjustment mechanism is associated with the expansion and contraction linkage mechanism. The bag width adjustment mechanism is associated with at least one of the left holding component 11 and the right holding component 12 through the expansion and contraction linkage mechanism. In other words, the bag width adjustment mechanism adjusts the state of the expansion and contraction linkage mechanism, so that the bag width adjustment mechanism indirectly adjusts the distance between the left holding component 11 and the right holding component 12 through the expansion and contraction linkage mechanism. The bag width adjustment mechanism is organically combined with the expansion and contraction linkage mechanism. The bag width adjustment mechanism does not need to be equipped with too many linkage mechanisms to be associated with at least one of the left holding component 11 and the right holding component 12. The structure is more compact and streamlined, and the implementation is more convenient and the cost is low. Specifically, the bag width adjustment mechanism includes a limit member 51 and an elastic member 52. The limit member 51 is adjustably connected to the module base 101 of the packaging machine conveying module 100 in the sliding direction of the expansion and contraction control rack 41. The elastic member 52 is arranged between the expansion and contraction control rack 41 and the module base 101. The elastic member 52 acts on the expansion and contraction control rack 41 to make the expansion and contraction control rack 41 elastically rest against the limit member 51, so that the bag width adjustment mechanism is associated and connected with the left retaining component 11 and the right retaining component 12 through the expansion and contraction linkage mechanism. In this embodiment, the limiting member 51 is specifically a screw, which is screwed onto the module base 101. Adjustment can be conveniently performed by twisting the limiting member 51. In addition, other structures can also be used. For example, the module base 101 is provided with pin holes at intervals along the sliding direction of the expansion and contraction control rack 41. The limiting member 51 is a limiting pin, and the limiting member 51 is inserted into different pin holes to achieve an adjustable connection to the module base 101. The expansion and contraction control rack 41 is provided with an abutment portion, and the abutment portion is provided with a through hole for the screw to pass through. The expansion and contraction control rack 41 is limited by the cap portion of the screw. The elastic member 52 is specifically a spring, which is sleeved on the rod portion of the screw. The structure is compact and stable, ensuring that the elastic member 52 stably applies elastic force to the expansion and contraction control rack 41. By screwing the limiter 51, the expansion and contraction control rack 41 can be driven to slide, thereby greatly adjusting the distance between the left holding component 11 and the right holding component 12 to adapt to packaging bags of different sizes. The bag width adjustment mechanism only limits the expansion and contraction control rack 41 on one side, and the expansion and contraction control rack 41 still has elastic activity space. The expansion and contraction control rack 41 can slide relative to the limiter 51 to the side away from the limiter 51 by overcoming the elastic component 52. In other words, after adjusting the bag width, the expansion and contraction drive mechanism can also drive the expansion and contraction control rack 41 to move so that the distance between the left holding component and the right holding component can be slightly adjusted. That is, after matching packaging bags of different sizes, the bag expansion and contraction actions can still be realized normally, meeting the needs of packaging processing and ensuring the normal progress of packaging processing.

[0077] Furthermore, the left holding component 11 and the right holding component 12 can be suction cups or clamps, as long as the left holding component 11 and the right holding component 12 can be stably engaged with the sides of the packaging bag respectively to keep the packaging bag in a controlled state. The suction cup adsorbs the sides of the packaging bag by negative pressure adsorption, while the clamp clamps and fixes the sides of the packaging bag by clamping. For the suction cup, the packaging bag is grabbed and released by controlling the opening and closing of the negative pressure. For the clamp, the packaging bag is grabbed and released by controlling the opening and closing of the clamp. Relatively speaking, the clamp structure is more convenient to implement and has lower cost. The clamp preferably adopts an elastic clamp, which can automatically and stably clamp and fix the packaging bag. As shown in Figures 6 and 7, the left holding component 11 and the right holding component 12 in this embodiment are specifically clamps. Correspondingly, a clamping linkage mechanism is provided on the packaging machine conveying module 100. The clamping linkage mechanism drives the left holding component 11 and the right holding component 12 of all holding units 1 to switch synchronously between the open clamping state and the closed clamping state. When loading bags, the clamp first switches to the open clamping state to receive the incoming packaging bags, and then switches to the closed clamping state to stably clamp the packaging bags. When unloading, the clamp switches to the open clamping state to release the packaging bags that have been packaged. The clamping linkage mechanism has high integration, compact structure, small space occupation, and more convenient driving. Only one driving mechanism is required, which reduces the design difficulty and occupied volume of the driving mechanism, and effectively ensures the consistency of the holding unit action.

[0078] As shown in Figures 4 and 5, the clamping linkage mechanism includes a clamping linkage rod 61, which extends along the arrangement direction of the holding unit 1. The clamping linkage rod 61 is provided with an actuating portion 62 associated with the left holding component 11 and the right holding component 12. The clamping linkage rod 61 drives the left holding component 11 and the right holding component 12 to switch synchronously between the open clamping state and the closed clamping state through the actuating portion 62 in a manner of rotating around its own axis or moving along the axial direction. Specifically, the clamping linkage rod 61 is a long rod along the arrangement direction of the holding unit 1, and the clamping linkage rod 61 is rotatably connected to the module base 101. The end of the clamping linkage rod 61 is provided with a cam rocker arm for driving the clamping linkage rod 61 to rotate. The actuating portion 62 includes a swing arm member 621 and a push rod 622. The clamping linkage rod 61 is provided with a swing arm member 621 that rotates with the clamping linkage rod 61. The push rod 622 is a long rod along the arrangement direction of the holding unit 1. The push rod 622 is slidably connected to the module base 101, and the sliding direction of the push rod 622 is perpendicular to the push rod. In the axial direction of the push rod 622, the swing arm part 621 is associated with the push rod 622, and a U-shaped notch or a long groove is provided on the swing arm part 621. The U-shaped notch or the long groove cooperates with the push rod 622 to form a slot pin pair. When the clamping linkage rod 61 rotates, the swing arm part 621 pushes the push rod 622 to slide. The push rod 622 is associated with all the left holding parts 11 and the right holding parts 12. When the push rod 622 slides, it pushes all the left holding parts 11 and the right holding parts 12 to enable all the holding units 1 to switch to the open clamping state synchronously.

[0079] As shown in Figures 6 and 7, the left holding component 11 and the right holding component 12 respectively include a clamp main body 111, a clamp sub-body 112 and a clamp elastic member 113. The clamp sub-body 112 is movably connected to the clamp main body 111, and the clamp elastic member 113 is provided between the clamp main body 111 and the clamp sub-body 112 so that the packaging bag is clamped between the clamp main body 111 and the clamp sub-body 112. More specifically, the clamp main body 111 includes a cantilever portion, and the clamp sub-body 112 is linearly slidably connected to the cantilever portion, which can effectively suspend and hold the packaging bag to avoid interference. Furthermore, a roller 114 is rotatably provided on the clamp sub-body 112, and the roller 114 is used to cooperate with the clamping linkage mechanism to drive the clamp sub-body 112 to move relative to the clamp main body 111. Since the left holding component 11 and the right holding component 12 are movable to adjust the spacing, there is a situation in which the left holding component 11 and the right holding component 12 are movable relative to the clamping linkage mechanism. To ensure smooth movement of the left and right retaining members 11 and 12 without significant obstruction, rollers 114 are provided on the clamp sub-body 112. The rollers 114 engage and contact the push rods 622 of the clamp linkage mechanism. The rollers 114 can roll relative to the push rods 622 in the longitudinal direction of the push rods 622, ensuring that the push rods 622 can reliably push the clamp sub-body 112 via the rollers 114 and that the left and right retaining members 11 and 12 can slide smoothly to adjust the spacing. As shown in Figures 3 to 5, in this embodiment, a receiving position 102 for placing packaging bags is provided on the side of the packaging machine conveying module 100 perpendicular to the arrangement direction of the retaining units 1. The retaining units 1 suspend and retain the packaging bags in the receiving position 102. This structure is less prone to interference and facilitates the packaging process of bag loading.

[0080] Furthermore, as shown in FIG2 , the circulating conveying mechanism 200 includes two guide rails 201 parallel to each other and forming an annular path. The packaging machine conveying module 100 is slidably connected to the guide rails 201. The conveying drive mechanism of the circulating conveying mechanism 200 drives the packaging machine conveying module 100 to intermittently move along the guide rails 201. Specifically, the length direction of the packaging machine conveying module 100 is perpendicular to the conveying direction of the circulating conveying mechanism 200, that is, the parallel arrangement direction of the holding units 1 on the packaging machine conveying module 100 is perpendicular to the conveying direction of the circulating conveying mechanism 200. The two ends of the packaging machine conveying module 100 are respectively slidably connected to a guide rail 201. Specifically, the module base 101 includes two support plates 103 arranged at intervals. The two support plates 103 are respectively slidably connected to a guide rail 201. The expansion and contraction linkage mechanism and the holding unit 1 arranged in parallel are arranged between the two support plates 103. The structure is simple and compact. The support plate 103 plays the role of carrying the expansion and contraction linkage mechanism, the holding unit 1 and other components, and at the same time slides with the guide rail 201. The holding unit 1 is suspended between the two support plates 103. The structure is light and stable. As shown in Figure 8, the expansion and contraction control component is arranged on the support plate 103, which facilitates the expansion and contraction control component to cooperate with the expansion and contraction drive mechanism next to the circulating conveying mechanism 200 to drive the expansion and contraction linkage rod 2 to move. Specifically, the expansion and contraction control rack 41 and the expansion and contraction control gear 42 are arranged on the support plate 103, the expansion and contraction control rack 41 is slidingly connected to the support plate 103, and the expansion and contraction control gear 42 is rotatably connected to the support plate 103. Similarly, the limit member 51 of the bag width adjustment mechanism is adjustably connected to the support plate 103, and the elastic member 52 is arranged between the support plate 103 and the expansion and contraction control rack 41 so that the expansion and contraction control rack 41 elastically rests on the limit member 51.

[0081] Furthermore, the support plate 103 is provided with a sliding portion that cooperates with the guide rail 201, and the sliding portion includes a first guide wheel 2021 and a second guide wheel 2022. The first guide wheel 2021 and the second guide wheel 2022 clamp the guide rail 201 therebetween, and guide grooves are respectively provided on both sides of the guide rail 201. The first guide wheel 2021 and the second guide wheel 2022 are respectively embedded in the guide grooves for sliding, thereby ensuring the precise and stable movement of the packaging machine conveying module 100. Furthermore, the first guide wheel 2021 and the second guide wheel 2022 respectively include two guide wheels, and the two first guide wheels 2021 and the two second guide wheels 2022 are respectively spaced apart along the path direction of the guide rail 201. The path of the guide rail 201 is an oblong as a whole, that is, the guide rail 201 includes an arc segment and a straight line segment. When the sliding part is in the arc segment and the straight line segment of the guide rail 201, the first guide wheel 2021 and the second guide wheel 2022 are in rolling contact with the guide rail 201. When the packaging machine conveying module 100 moves to the arc segment, the sliding part on the support plate 103 cooperates with the arc segment of the guide rail 201, and the first guide wheel 2021 and the second guide wheel 2022 are in rolling contact with the arc segment, thereby ensuring stability and smoothness in cornering. The plane where the conveying path of the circulating conveying mechanism 200 is located is along the vertical direction, the two straight segments of the guide rail 201 are parallel to the horizontal plane, the two straight segments are distributed up and down, and the two ends of the two straight segments are connected by arc segments respectively. The conveying drive mechanism of the circulating conveying mechanism 200 can specifically be a chain drive mechanism, a synchronous belt drive mechanism, a magnetic levitation drive mechanism, etc.

[0082] Furthermore, as shown in Figures 1, 2 and 9, the expansion and contraction drive mechanism includes one or a combination of a power actuator 301 and a guide member 302 provided along the conveying path of the circulating conveying mechanism 200. The power actuator 301 refers to a mechanism capable of performing an action, and may be a mechanism driven by a motor, a cylinder, or the like. As shown in Figure 2, the power actuator 301 is an action mechanism capable of performing linear reciprocating motion. The movement direction of the power actuator 301 is along the sliding direction of the expansion and contraction control rack 41. In one embodiment, the power actuator 301 includes a toggle member 3011 and a power assembly 3012. The toggle member 3011 is connected to the power assembly 3012 and driven thereby. The toggle member 3011 includes two parallel and spaced-apart members. The lever in the conveying direction of the circular conveyor mechanism 200 is engaged. When the packaging machine conveyor module 100 moves to the position of the power actuator 301, the control portion on the expansion and contraction control rack 41 enters the shifting member 3011 of the power actuator 301. The power assembly 3012 actuates, driving the expansion and contraction control rack 41 via the shifting member 3011, thereby driving the holding unit 1 to switch between the expanded and retracted positions. The power actuator 301 is an active expansion and contraction drive mechanism, actively driving the expansion and contraction linkage mechanism as needed. As shown in Figures 2 and 9, the guide member 302 can be a guide groove, guide rail, or other component. The packaging machine conveyor module 100 moves under the drive of the circular conveyor mechanism 200. The path shape and structure of the guide member 302 are designed to automatically drive the expansion and contraction linkage mechanism during the movement of the packaging machine conveyor module 100. Specifically, the expansion and contraction linkage mechanism can be driven by bending or turning the path of the guide member 302.

[0083] In a packaging machine, during the packaging process of filling materials, it is necessary to maintain the holding unit 1 in a retracted bag position. To improve production efficiency and optimize the dynamic-static ratio during operation of the packaging machine, when a large amount of material is to be filled, resulting in a long time, the filling process is divided into multiple steps, thereby covering a longer conveying path. The guide member 302 is more suitable for such an application scenario. The expansion and contraction drive mechanism can be either a power actuator 301 or a guide member 302, or a combination of the two, depending on the specific situation. When the power actuator 301 and the guide member 302 are combined, the power actuator 301 first drives the expansion and contraction control member of the expansion and contraction linkage mechanism to move, and then the power actuator 301 guides the expansion and contraction control member into the guide member 302. Therefore, the expansion and contraction control member of the expansion and contraction linkage mechanism is guided and limited by the guide member 302 along the longer conveying path, so that the holding unit 1 is maintained in the desired position.

[0084] When the bag width adjustment mechanism is associated with at least one of the left holding component 11 and the right holding component 12 via the expansion-contraction linkage mechanism, the bag width adjustment mechanism adjusts the state of the expansion-contraction linkage mechanism. The bag width adjustment mechanism then indirectly adjusts the distance between the left holding component 11 and the right holding component 12 via the expansion-contraction linkage mechanism to accommodate packaging bags of different sizes. When the bag width adjustment mechanism adjusts the state of the expansion-contraction linkage mechanism to accommodate packaging bags of different sizes, the initial position of the expansion control member of the expansion-contraction linkage mechanism changes, requiring the expansion drive mechanism to adaptively adjust to the newly positioned expansion control member, thereby ensuring normal expansion and contraction adjustment even when accommodating packaging bags of different sizes. The toggle member 3011 is adjustably connected to the power assembly 3012 and is driven by it to move. The position of the toggle member 3011 is adjusted to adapt to the change in the position of the expansion and contraction control member. Specifically, the toggle member 3011 includes a clamping hoop portion 3013, and the power assembly 3012 includes a pull rod. The clamping hoop portion 3013 is adjustably connected to the pull rod, which is easy to assemble and disassemble, has a stable connection, and is easy to adjust. The position change of the expansion and contraction control member can be accurately adapted by adjusting the height position of the toggle member 3011 on the pull rod; as for the guide member 302, the guide member 302 is adjustably arranged next to the circular conveying mechanism 200, and the packaging machine conveying device will be provided with a side panel (not shown in the figure) on the side of the circular conveying mechanism 200. The side panel is used to protect the various components inside the packaging machine conveying device and also to ensure aesthetics. The guide member 302 can be adjustably installed on the side panel. After the bag width is adjusted, the height of the guide member 302 can be conveniently adjusted to accurately adapt to the position change of the expansion and contraction control member. Of course, for the power actuator mechanism 301, the toggle member 3011 moves under the drive of the power component 3012, so that the range of movement of the toggle member 3011 can be directly adjusted by the power component 3012 to adapt to the position change of the expansion and contraction control component after the bag width is adjusted.

[0085] In one embodiment shown in Figures 10 to 12, the left holding component 11 and the right holding component 12 are both slidably adjustable in the arrangement direction of the holding unit 1. The retractable linkage rod 2 includes a linkage rod 1 24 and a linkage rod 2 25 that are parallel to each other. The linkage rod 1 24 is connected to the left holding component 11, and the linkage rod 2 25 is connected to the right holding component 12. The left holding component 11 slides with the linkage rod 2 25, and the right holding component 12 slides with the linkage rod 1 24. The linkage rod 1 24 and the linkage rod 2 25 move in opposite directions along the axial direction to adjust the spacing between the left holding component 11 and the right holding component 12. Specifically, the linkage rod 1 24 and the linkage rod 2 25 are long rods along the arrangement direction of the holding unit 1. The linkage rod 1 24 includes two parallel rods, and the linkage rod 2 25 also includes two parallel rods, which effectively improves the structural stability and ensures that the spacing between the left holding component 11 and the right holding component 12 is stably and accurately adjusted. When the gears are turned in the opposite direction, the gears 33 are rotated in a direction opposite to the gears 34. When the gears 34 are turned in the opposite direction, the gears 33 are rotated in a direction opposite to the gears 34. When the gears 34 are turned in the opposite direction, the gears 33 are rotated in a direction opposite to the gears 34. Furthermore, this embodiment also adopts a combination of an expansion and contraction control rack 41 and an expansion and contraction control gear 42 to form an expansion and contraction control component. Since the linkage rod 1 24 and the linkage rod 2 25 are axially moving, the expansion and contraction control gear 42 is connected to the expansion and contraction linkage rod through a transmission mechanism to drive the expansion and contraction linkage rod to move along its own axial direction. Specifically, the expansion and contraction control gear 42 is connected to the linkage rod 1 24 through a screw pair, that is, the expansion and contraction control gear 42 is connected to the screw of the screw pair to drive the screw to rotate, and the linkage rod 1 24 is connected to the nut component of the screw pair. The screw pair converts the rotational motion of the expansion and contraction control gear 42 into an axial linear motion of the linkage rod 1 24, thereby adjusting the distance between the left retaining component 11 and the right retaining component 12 to switch between the expanding bag posture and the shrinking bag posture.

[0086] In one embodiment, as shown in Figures 13 to 15, a left holding member 11 and a right holding member 12 are rotatably mounted on a module base 101 of a packaging machine conveying module 100. Each of the left holding member 11 and the right holding member 12 is provided with a gear portion 13. The left holding member 11 and the right holding member 12 are meshed and transmission-connected. In this embodiment, the left holding member 11 and the right holding member 12 swing to adjust the distance between the left holding member 11 and the right holding member 12 to switch the holding unit 1 between a bag-expanding position and a bag-contracting position. The distance between the left holding member 11 and the right holding member 12 refers to the distance between the junction of the left holding member 11 and the left side of the bag and the junction of the right holding member 12 and the right side of the bag. Changing the distance allows the bag to switch between a straightened state and a relaxed state. Since the left holding member 11 and the right holding member 12 are meshed and transmission-connected, simply driving one of the left holding member 11 and the right holding member 12 to rotate automatically causes the other to rotate in the opposite direction. In this embodiment, a push portion 23 is provided on the expansion and contraction linkage rod 2 of the expansion and contraction linkage mechanism. When the expansion and contraction linkage rod 2 moves axially, the push portion 23 pushes one of the left retaining component 11 and the right retaining component 12 to deflect, thereby adjusting the distance between the left retaining component 11 and the right retaining component 12. Of course, the expansion and contraction linkage rod 2 can also use the push portion 23 to drive one of the left retaining component 11 and the right retaining component 12 to deflect by rotating about its own axis. The push portion 23 can specifically be a cam structure. The expansion and contraction control component of the expansion and contraction linkage mechanism is also composed of an expansion and contraction control rack 41 and an expansion and contraction control gear 42. When the expansion and contraction linkage rod 2 is driven by moving axially, the expansion and contraction control gear 42 is connected to the expansion and contraction linkage rod 2 through a screw pair to convert the rotational motion into linear motion. In this embodiment, a bag width adjustment mechanism is also provided, which includes a limiter 51 and an elastic member 52. The limiter 51 is adjustable in the sliding direction of the expansion and contraction control rack 41 and is connected to the module base 101 of the packaging machine conveying module 100. An elastic member 52 is provided between the expansion and contraction control rack 41 and the module base 101. The elastic member 52 acts on the expansion and contraction control rack 41 to elastically abut the expansion and contraction control rack 41 against the limiter 51, so that the bag width adjustment mechanism is associated with the left holding component 11 and the right holding component 12 through the expansion and contraction linkage mechanism, so that the bag width can be adjusted while the expansion and contraction bag can be adjusted.

[0087] In the embodiment shown in Figures 16 and 17, the left holding component 11 and the right holding component 12 respectively include a clamp main body 111, a clamp sub-body 112 and a clamp elastic member 113. The clamp sub-body 112 is slidably connected to the clamp main body 111, and the clamp elastic member 113 is arranged between the clamp main body 111 and the clamp sub-body 112. A clamp plate 115 is fixedly connected to the clamp main body 111, and a clamp plate 2 116 is also rotatably connected to the clamp main body 111. The clamp sub-body 112 is transmission-connected to the clamp plate 2 116. The clamp main body 111 has a cylindrical cantilever portion, and the clamp sub-body 112 is slidably arranged inside the cantilever portion. When the clamp sub-body 112 slides relative to the clamp main body 111, it drives the clamp plate 2 116 to rotate relative to the clamp main body 111. The clamp plate 115 and the clamp plate 2 116 cooperate to clamp the packaging bag therebetween. In this embodiment, the clamping linkage mechanism includes a clamping linkage rod 61, which extends along the arrangement direction of the holding unit 1. The clamping linkage rod 61 is provided with an actuating portion 62 associated with the left holding component 11 and the right holding component 12. The actuating portion 62 is a cam. The clamping linkage rod 61 drives the left holding component 11 and the right holding component 12 to switch synchronously between the open clamping state and the closed clamping state through the actuating portion 62 in a manner of rotating around its own axis.

[0088] The embodiment shown in Figure 18 differs from the previous embodiment in that the extension and retraction linkage mechanism's extension and retraction control member is a pusher portion 43 disposed on the end of the extension and retraction linkage rod 2, which is used to drive the extension and retraction linkage rod 2 along its own axial direction. This structure is simple and easy to implement. In this embodiment, the actuating portion 62 disposed on the clamping linkage rod 61 is a wedge-shaped block structure. The clamping linkage rod 61 moves along its own axial direction via the actuating portion 62, driving the left retaining member 11 and the right retaining member 12 to synchronously switch between the open and closed states. Alternatively, the extension and retraction control member may be a rocker arm connected to the extension and retraction linkage rod 2, which is used to drive the extension and retraction linkage rod 2 to rotate about its own axial direction.

[0089] As shown in the embodiment of Figures 21 and 22, a receiving position 102 for placing the packaging bag is provided on the module base 101 of the packaging machine conveying module 100 in the middle perpendicular to the arrangement direction of the holding unit 1. In other words, the packaging bag is held in the middle of the packaging machine conveying module 100 by the holding unit 1. It adopts a symmetrical structure with good balance, keeping the center of gravity in the middle of the packaging machine conveying module 100, and avoiding weight bias that causes instability of the packaging machine conveying module 100 during movement. Specifically, the retractable linkage rod 2 includes a linkage rod 1 24 and a linkage rod 2 25 parallel to each other. The linkage rod 1 24 is connected to the left holding component 11, and the linkage rod 2 25 is connected to the right holding component 12. The linkage rod 1 24 and the linkage rod 2 25 move in opposite directions in the axial direction to adjust the distance between the left holding component 11 and the right holding component 12. The linkage rod 1 24 and the linkage rod 2 25 are connected by a reverse linkage mechanism. When one of the linkage rod 1 24 and the linkage rod 2 25 moves in the axial direction, the reverse linkage mechanism drives the other to move in the reverse direction in the axial direction. The reverse linkage mechanism includes a shift rod 34, the middle part of which is rotatably connected to the module base 101 of the packaging machine conveying module 100. One end of the shift rod 34 is transmission-connected to the linkage rod 1 24 through a groove pin substructure, and the other end of the shift rod 34 is transmission-connected to the linkage rod 2 25 through a groove pin substructure. When one of the linkage rod 1 24 and the linkage rod 2 25 moves in the axial direction, the shift rod 34 drives the other to move in the reverse direction in the axial direction. The expansion and contraction linkage mechanism's expansion and contraction control member is a pusher 43 disposed on the end of linkage rod 1 24, which is used to drive linkage rod 1 24 to move along its own axis. It has a simple structure and is easy to implement. Furthermore, the left holding component 11 and the right holding component 12 of the holding unit 1 each include a clamping portion 117 and a clamping portion 118. Clamping portions 117 and 118 are located on either side of the receiving position 102 in a direction perpendicular to the arrangement of the holding unit 1. Specifically, clamping portion 117 is disposed on one side of the receiving position 102, and clamping portion 118 is disposed on the other side of the receiving position 102. Clamping portions 117 and 118 are movable relative to each other to clamp the packaging bag in the receiving position 102. More specifically, as shown in Figure 24, the left retaining component 11 and the right retaining component 12 respectively include a clamping body 119, the clamping part 117 and the clamping part 2 118 are respectively rotatably arranged relative to the clamping body 119, a clamping elastic member 1191 is arranged between the clamping part 117 and the clamping body 119, and a clamping elastic member 1191 is arranged between the clamping part 2 118 and the clamping body 119. The clamping elastic member 1191 is used to automatically maintain the clamping part 117 and the clamping part 2 118 in a closed state to ensure the stability of the clamped packaging bag.In this embodiment, the clamping linkage mechanism includes a clamping linkage rod 61, which extends along the arrangement direction of the holding unit 1. Two clamping linkage rods 61 are arranged in parallel to drive the clamping part 117 and the clamping part 2 118 to move respectively. The clamping linkage rod 61 is provided with an actuating part 62 associated with the left holding component 11 and the right holding component 12. The actuating part 62 is a cam. The clamping linkage rod 61 drives the clamping part 117 and the clamping part 2 118 to rotate through the actuating part 62 in an axial rotation manner, so that the left holding component 11 and the right holding component 12 can switch between the open clamping state and the closed clamping state.

[0090] An embodiment shown in Figures 19 and 20 also adopts a symmetrical structure. A receiving position 102 for placing packaging bags is provided on the module base 101 of the packaging machine conveying module 100 in the middle part perpendicular to the arrangement direction of the holding unit 1. Among them, the left holding component 11 and the right holding component 12 of the holding unit 1 respectively include a clamping part 117 and a clamping part 2 118. The clamping part 117 and the clamping part 2 118 are respectively distributed on both sides of the receiving position 102 in the arrangement direction perpendicular to the holding unit 1. The clamping part 117 is a fixed component that does not perform a clamping action. As shown in Figure 23, the clamping part 2 118 includes a clamping body 119, a clamping sub-part 1192 and a clamping elastic member 1191. The clamping sub-part 1192 is slidably connected to the clamping body 119, and the clamping elastic member 1191 is provided between the clamping body 119 and the clamping sub-part 119. 2, the clamping sub-part 1192 moves toward the side where the clamping part 117 is located under the action of the clamping elastic member 1191 to clamp the packaging bag between the clamping part 117 and the clamping part 2 118. The clamping linkage rod 61 is provided with an actuating part 62 associated with the clamping part 2 118 of the left holding component 11 and the right holding component 12. The actuating part 62 is a cam. The clamping linkage rod 61 drives the clamping sub-part 1192 of the clamping part 2 118 to move through the actuating part 62 in an axial rotation manner to switch the left holding component 11 and the right holding component 12 between the open clamping state and the closed clamping state. The telescopic linkage rod 2 includes two parallel rods, and a thread segment 1 21 and a thread segment 2 22 are provided on the telescopic linkage rod 2. The thread rotation direction of the thread segment 1 21 and the thread segment 2 22 are opposite. The clamping part 117 and the clamping part 2 118 of the left retaining component 11 are assembled on the thread segment 1 21, and the clamping part 117 and the clamping part 2 118 of the right retaining component 12 are assembled on the thread segment 2 22. The telescopic linkage rod 2 rotates around its own axis so that the left retaining component 11 and the right retaining component 12 move in opposite directions in the axial direction of the telescopic linkage rod 2 to adjust the spacing.

[0091] As shown in Figure 25, an embodiment of the expansion and contraction linkage mechanism includes an expansion and contraction linkage rod 2, and a bag width adjustment mechanism includes a bag width linkage rod 53. The expansion and contraction linkage rod 2 and the bag width linkage rod 53 are parallel to each other. The expansion and contraction linkage rod 2 and the bag width linkage rod 53 are long rods along the arrangement direction of the holding unit 1. A short-stroke expansion and contraction thread segment 26 is provided on the expansion and contraction linkage rod 2, and a long-stroke bag width thread segment 54 is provided on the bag width linkage rod 53. The left holding component 11 is assembled on the bag width thread segment 54 of the bag width linkage rod 53. The left holding component 11 slides with the expansion and contraction linkage rod 2, and the right holding component 12 is assembled on the expansion and contraction linkage rod. On the expansion and contraction threaded section 26 of the movable rod 2, the right holding component 12 and the bag width linkage rod 53 are slidably matched. When the expansion and contraction linkage rod 2 is rotated, the right holding component 12 can make a small lateral movement, while the left holding component 11 remains stationary, so that the holding unit 1 can synchronously switch between the bag expansion posture and the bag contraction posture. When the bag width linkage rod 53 is rotated, the left holding component 11 can make a long-stroke lateral movement. At this time, the right holding component 12 remains stationary, and the distance between the left holding component 11 and the right holding component 12 changes greatly, thereby achieving bag width adjustment so that the holding unit 1 can adapt to packaging bags of different sizes. In this embodiment, the expansion and contraction linkage mechanism and the bag width adjustment mechanism are independent of each other. The bag width adjustment mechanism is not associated with the expansion and contraction linkage mechanism. Instead, the bag width adjustment mechanism is directly associated with the left holding component 11. The expansion and contraction linkage mechanism and the bag width adjustment mechanism do not affect each other and can be adjusted independently of each other. When the bag width adjustment mechanism is actuated, it will not affect the action of the expansion and contraction linkage mechanism. The expansion and contraction drive mechanism that cooperates with the expansion and contraction linkage mechanism does not need to be adaptively adjusted.

[0092] In an embodiment shown in Figure 26, the left holding part 11 and the right holding part 12 are respectively rotatably arranged on the module base, and the left holding part 11 and the right holding part 12 are respectively provided with a gear part, and the left holding part 11 and the right holding part 12 are meshed and transmitted. The expansion and contraction linkage rod 2 of the expansion and contraction linkage mechanism is provided with a pushing part 23. When the expansion and contraction linkage rod 2 moves axially, it pushes the right holding part 12 to deflect through the pushing part 23. Since the left holding part 11 and the right holding part 12 are meshed and transmitted, the left holding part 11 will automatically be driven to rotate in the opposite direction, thereby realizing the adjustment of the distance between the left holding part 11 and the right holding part 12, that is, realizing the synchronous switching of the holding unit 1 between the expanded bag posture and the contracted bag posture. This embodiment is also provided with a bag width adjustment mechanism, which includes a bag width linkage rod 53, wherein the bag width linkage rod 53 is parallel to the expansion and contraction linkage rod 2, and a connecting block 55 is fixedly provided on the expansion and contraction linkage rod 2, and the bag width linkage rod 53 is rotatably connected to the connecting block 55, and a bag width threaded section 54 is provided on the bag width linkage rod 53, and the pushing portion 23 is slidingly connected to the expansion and contraction linkage rod 2, and the pushing portion 23 is also assembled on the bag width threaded section 54, so that the position of the pushing portion 23 can be adjusted along the axial direction of the expansion and contraction linkage rod 2 by rotating the bag width linkage rod 53, and when the position of the pushing portion 23 changes, the right retaining component 12 is pushed, so that the distance between the left retaining component 11 and the right retaining component 12 changes, thereby realizing bag width adjustment to enable the retaining unit 1 to adapt to packaging bags of different sizes. In this embodiment, the bag width adjustment mechanism does not interfere with the action of the expansion and contraction linkage mechanism. After the bag width adjustment mechanism adjusts the bag width, the expansion and contraction linkage mechanism can still reliably and normally adjust the distance between the left holding component 11 and the right holding component 12 by a small range, thereby ensuring that the packaging process can be carried out stably and reliably when matching packaging bags of different sizes. In addition, in this embodiment, after the bag width is adjusted, the pushing portion 43 on the end of the expansion and contraction linkage rod 2 does not change, so that the expansion and contraction drive mechanism cooperating with the expansion and contraction linkage mechanism does not need to be adaptively adjusted.

[0093] As shown in FIG27 , a packaging machine includes the aforementioned packaging machine conveying device and several operating mechanisms for performing different packaging processes. The operating mechanisms are respectively provided at various preset workstations along the conveying path of the packaging machine conveying device. A packaging machine requires performing packaging processes such as bagging, bag opening, filling, sealing, and unloading. These packaging processes typically require the packaging bags to be in a stationary state. Therefore, the circulating conveying mechanism 200 is an intermittently moving conveying mechanism. The circulating conveying mechanism 200 drives the packaging machine conveying module 100 to move intermittently. Several preset workstations are provided along the conveying path of the circulating conveying mechanism 200. Operating mechanisms for performing various packaging processes are provided at these preset workstations. Driven by the circulating conveying mechanism 200, the packaging machine conveying module 100 moves to and stops at the preset workstations, whereupon the operating mechanisms perform various packaging processes.

[0094] Specifically, the operating mechanisms include a bag loading mechanism 401, a bag opening mechanism 402, a filling mechanism 403, a sealing mechanism 404, and a discharging mechanism 405. Each operating mechanism includes a corresponding number of operating units to the number of holding units 1 in the packaging machine's conveying module 100, thereby efficiently implementing multi-station packaging processing and effectively improving packaging processing efficiency. The bag loading mechanism 401 is used to place packaging bags stored in the bag compartment onto the holding units 1 of the packaging machine's conveying module 100. The bag opening mechanism 402 opens the mouth of the packaging bag in preparation for subsequent filling. The filling mechanism 403 is used to fill the packaging bag with material. The sealing mechanism 404 seals the packaging bag. The discharging mechanism 405 receives the completed packaging bag containing material for discharging.

[0095] Furthermore, the circulating conveying mechanism 200 of the packaging machine needs to perform conveying actions, the packaging machine conveying module 100 needs to perform bag expanding and shrinking actions, and clamp opening and closing actions, and each operating mechanism also needs to perform various packaging processing actions. The packaging machine requires a power system to drive each component to move. If each component uses an independent power drive mechanism, when one of the power drive mechanisms fails, it will cause the operation of the entire packaging machine to be interrupted and serious problems will occur. Therefore, the packaging machine preferably uses a linked power system. Specifically, the power system includes a total power source, a transfer mechanism and a number of cam transmission mechanisms. The total power source can be a motor, an engine, etc. The transfer mechanism is connected to the total power source to distribute the power of the total power source. The transfer mechanism includes a continuous power output end and an intermittent power output end. The continuous power output end outputs power for continuous action, and the intermittent power output end outputs power for intermittent action. The intermittent power output end is connected to the circulating conveying mechanism 200, so that the circulating conveying mechanism 200 drives the packaging machine conveying module 100 to move intermittently. The packaging machine conveying module 100 moves to the preset work station and stops at the preset work station under the drive of the circulating conveying mechanism 200, and then the operating mechanism performs various packaging processing operations. The circulating conveying mechanism 200 then drives the packaging machine conveying module 100 to continue moving. The continuous power output end is connected to each operating mechanism through the corresponding cam transmission mechanism. Each operating mechanism moves under the drive of the cam transmission mechanism to cooperate with the intermittently moving packaging machine conveying module 100 with high precision to ensure the stability and accuracy of the packaging processing. Preferably, the cam transmission mechanisms are connected in sequence to form a series transmission structure, so that when one of the transmission links fails, the entire power system will stop, effectively avoiding interference and collision among the various movable mechanisms of the packaging machine, avoiding the expansion of accident losses, and facilitating rapid maintenance to resume production operations.

[0096] During the packaging process, if there is a mechanical failure or communication failure, material leakage may occur. That is, the packaging bag may not be placed on the holding unit, the packaging bag may fall off the holding unit, or the material may leak out during filling. These situations may be caused by the packaging machine conveying module not moving into place, the left holding component and the right holding component of the holding unit failing to function, the bag shrinking posture not being good, resulting in the bag mouth failing to open effectively, making it difficult to accurately and fully load the material into the bag. The packaging bag and material falling into the packaging machine equipment will affect the normal operation of the packaging machine equipment, causing damage to the equipment and pollution. In order to clean up the leftover packaging bags and materials, as shown in Figures 28 and 29, a scraper mechanism 71 is further provided on the module base 101 of the packaging machine conveying module 100. The packaging machine conveying module 100 is driven by a circular conveying mechanism. A baffle 72 can be provided below the travel path of the packaging machine conveying module 100. The leftover packaging bags and materials will fall on the baffle 72. The baffle 72 serves as a receiving device for receiving the leftover packaging bags and materials. The scraper mechanism 71 will travel along with the packaging machine conveying module 100, and the scraper mechanism 71 will scrape along the baffle 72, thereby moving the packaging bags and materials on the baffle 72 along the travel direction of the packaging machine conveying module 100. For centralized cleaning, it is preferred that a collecting mechanism 73 is provided at the end of the baffle 72 in the direction of travel of the packaging machine conveying module 100 to centrally receive the packaging bags and materials. When the packaging machine conveying module 100 is traveling, the scraper mechanism 71 is used to clean and push the packaging bags and materials to the collecting mechanism 73. The collecting mechanism 73 can specifically be a container with a certain volume. The packaging bags and materials are temporarily stored in the container and then cleaned regularly. The collecting mechanism 73 can specifically be a conveyor belt. After the packaging bags and materials are pushed onto the conveyor belt, the conveyor belt is used to transport the packaging bags and materials to the outside of the packaging machine in real time. Specifically, the conveying direction of the conveyor belt is perpendicular to the direction of travel of the packaging machine conveying module 100.

[0097] As shown in Figures 28 and 29, a preferred embodiment of the scraper mechanism 71 includes a fixed body 711 and a sliding body 712. The fixed body 711 is connected to the module base 101, and the sliding body 712 is slidably connected to the fixed body 711. In other words, the scraper mechanism 71 is a retractable structure that can be retracted and deployed. Specifically, when the packaging machine is operating normally, the sliding body 712 is retracted within the fixed body 711 to prevent the sliding body 712 from continuously acting on the baffle 72 and causing wear of the sliding body 712, thereby preventing the difficulty in collecting and discharging all the leaked materials in the event of subsequent material leakage. In other words, the switching between the retraction and deployment of the scraper mechanism 71 is manually controllable. When no material leakage occurs, the scraper mechanism 71 is always in the retraction state. Only when material leakage occurs does the scraper mechanism 71 switch to the deployed state for cleaning.

[0098] In a preferred embodiment, when the packaging machine conveying module 100 is in a preset positive posture, the sliding body 712 automatically slides relative to the fixed body 711 and switches to an unfolded state; when the packaging machine conveying module 100 is in a preset negative posture, the sliding body 712 automatically slides relative to the fixed body 711 and switches to a recovered state. In a specific embodiment, the conveying path of the circular conveying mechanism is oblong, and the plane where the conveying path is located is along the vertical direction. The conveying path of the circular conveying mechanism includes arc segments and straight segments. The two straight segments are parallel to the horizontal plane and are distributed up and down. The two ends of the two straight segments are connected by arc segments, so that the packaging machine conveying module 100 moves in a circular path. When the packaging machine conveying module 100 is in the upper straight segment, the packaging machine conveying module 100 is in a preset positive posture, and when the packaging machine conveying module 100 is in the lower straight segment, the packaging machine conveying module 100 is in a preset negative posture. The packaging machine conveying module 100 in the negative posture is upside down relative to the packaging machine conveying module 100 in the positive posture. The sliding body 712 and the fixed body 711 of the scraper mechanism 71 are in a free sliding cooperation state. When the packaging machine conveying module 100 switches between the positive posture and the negative posture, the sliding body 712 and the fixed body 711 automatically slide relative to each other under the action of gravity to switch between the expanded state and the retracted state. When the packaging machine conveying module 100 is in a preset positive posture, the scraper mechanism automatically switches to the expanded state under the action of gravity, and the sliding body 712 slides out of the fixed body 711, so that the sliding body 712 can effectively cooperate with the baffle 72 below the travel path of the packaging machine conveying module 100 to reliably realize the cleaning function and the function of centralized recovery of leaked materials. Preferably, when the scraper mechanism 71 is in the expanded state, the sliding body 712 can contact the upper surface of the baffle 72, thereby fully cleaning and pushing the materials on the baffle 72. The sliding body 712 can be specifically provided with a brush to contact the baffle 72. It not only ensures the adequacy of cleaning, but also avoids the sliding body 712 from contacting the baffle 72 to generate excessive friction resistance to hinder the normal movement of the packaging machine conveying module 100; and when the packaging machine conveying module 100 is in a preset reverse posture, the scraper mechanism automatically switches to the recovery state under the action of gravity, and the sliding body 712 slides into the fixed body 711, reducing the occupied space, which is particularly beneficial to reducing the distance between the two straight sections of the circulating conveying mechanism, avoiding interference between the packaging machine conveying module during movement, and the high compactness of the structure is beneficial to improving the overall compactness of the packaging machine and reducing the size of the equipment.

[0099] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention should be determined by the scope defined in the claims. Persons skilled in the art will appreciate that improvements and modifications may be made without departing from the spirit and scope of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A packaging machine conveying module, characterized in that: The invention comprises a module base (101), on which an expansion and contraction linkage mechanism and at least two holding units (1) arranged in parallel for placing packaging bags are arranged, wherein the holding unit (1) comprises a left holding component (11) and a right holding component (12) for engaging with the side of the packaging bag, the left holding component (11) and the right holding component (12) being movable relative to each other, and the expansion and contraction linkage mechanism is used to enable the left holding component (11) and the right holding component (12) to move relative to each other, so as to drive all the holding units (1) to switch synchronously between the bag expansion posture and the bag contraction posture, and the distance between the left holding component (11) and the right holding component (12) in the bag expansion posture is greater than the distance between the two in the bag contraction posture.

2. The packaging machine conveying module according to claim 1, characterized in that: The module base (101) is also provided with a bag width adjustment mechanism, which is associated with at least one of the left holding component (11) and the right holding component (12) so as to synchronously adjust the distance between the left holding component (11) and the right holding component (12) of each holding unit (1) to adapt to packaging bags of different sizes.

3. The packaging machine conveying module according to claim 2, characterized in that: The bag width adjustment mechanism is associated with the expansion and contraction linkage mechanism, and the bag width adjustment mechanism is associated with at least one of the left holding component (11) and the right holding component (12) through the expansion and contraction linkage mechanism.

4. The packaging machine conveying module according to claim 3, characterized in that: The bag width adjustment mechanism comprises a limiter (51) and an elastic component (52); the limiter (51) is adjustably connected to a module base (101) of a packaging machine conveying module (100); and the elastic component (52) acts on an expansion and contraction control component of the expansion and contraction linkage mechanism so that the expansion and contraction control component elastically abuts against the limiter (51).

5. The packaging machine conveying module according to claim 1, characterized in that: The retractable linkage mechanism comprises a retractable linkage rod (2) and a retractable control member. The retractable linkage rod (2) is arranged to extend along the arrangement direction of the holding unit (1). The retractable linkage rod (2) is associated with at least one of the left holding component (11) and the right holding component (12). The retractable control member is connected to the retractable linkage rod (2) in a transmission manner so as to drive the retractable linkage rod (2) to rotate around its own axis or move along its own axis to drive the left holding component (11) and the right holding component (12) to move relative to each other.

6. The packaging machine conveying module according to claim 5, characterized in that: The telescopic linkage rod (2) is provided with a threaded section 1 (21) and a threaded section 2 (22), the threaded sections 1 (21) and 2 (22) having opposite threaded directions, the left retaining component (11) is mounted on the threaded section 1 (21), and the right retaining component (12) is mounted on the threaded section 2 (22), and the telescopic linkage rod (2) rotates around its own axis so that the left retaining component (11) and the right retaining component (12) move in opposite directions in the axial direction of the telescopic linkage rod (2); Alternatively, the retractable linkage rod (2) comprises a linkage rod 1 (24) and a linkage rod 2 (25) which are parallel to each other, the linkage rod 1 (24) is connected to the left holding component (11), the linkage rod 2 (25) is connected to the right holding component (12), the left holding component (11) and the linkage rod 2 (25) are slidably matched, the right holding component (12) and the linkage rod 1 (24) are slidably matched, and the linkage rod 1 (24) and the linkage rod 2 (25) move in opposite directions along the axial direction; Alternatively, a pushing portion (23) is provided on the telescopic linkage rod (2), and when the telescopic linkage rod (2) rotates around its own axis or moves along its axis, the pushing portion (23) pushes one of the left retaining component (11) and the right retaining component (12) to move.

7. The packaging machine conveying module according to claim 6, characterized in that: The linkage rod 1 (24) and the linkage rod 2 (25) are connected via a reverse linkage mechanism. When one of the linkage rod 1 (24) and the linkage rod 2 (25) moves along the axial direction, the reverse linkage mechanism drives the other to move in the reverse direction in the axial direction.

8. The packaging machine conveying module according to claim 7, characterized in that: The reverse linkage mechanism comprises a rack bar 1 (31), a rack bar 2 (32) and a gear bar 1 (33); the linkage rod 1 (24) is connected to the rack bar 1 (31); the linkage rod 2 (25) is connected to the rack bar 2 (32); the length direction of the rack bar 1 (31) and the rack bar 2 (32) is along the axis direction of the linkage rod 1 (24) and the linkage rod 2 (25); the rack bar 1 (31) and the rack bar 2 (32) are arranged in parallel and spaced apart; the gear bar 1 (33) is arranged between the rack bar 1 (31) and the rack bar 2 (32) and meshes with the two respectively; Alternatively, the reverse linkage mechanism comprises a lever (34), the middle part of which is rotatably connected to a module base (101) of a packaging machine conveying module, one end of which is transmission-connected to linkage rod 1 (24) via a groove pin substructure, and the other end of which is transmission-connected to linkage rod 2 (25) via a groove pin substructure.

9. The packaging machine conveying module according to claim 5, characterized in that: The expansion and contraction control component comprises an expansion and contraction control rack (41) and an expansion and contraction control gear (42); the expansion and contraction control rack (41) is slidably arranged on a module base (101) of a packaging machine conveying module (100); the expansion and contraction control gear (42) is rotatably arranged on the module base (101); the expansion and contraction control rack (41) and the expansion and contraction control gear (42) are meshed and transmitted; the expansion and contraction control gear (42) is transmission-connected with the expansion and contraction linkage rod (2) to drive the expansion and contraction linkage rod (2) to rotate around its own axis or move along its own axis.

10. The packaging machine conveying module according to claim 9, characterized in that: It also includes a limiter (51) and an elastic component (52); the limiter (51) is adjustably connected to the module base (101) of the packaging machine conveying module (100) in the sliding direction of the expansion and contraction control rack (41); an elastic component (52) is arranged between the expansion and contraction control rack (41) and the module base (101); the elastic component (52) enables the expansion and contraction control rack (41) to elastically abut against the limiter (51).

11. The packaging machine conveying module according to claim 1, characterized in that: The left holding component (11) and the right holding component (12) are clamps. The packaging machine conveying module (100) is provided with a clamping linkage mechanism. The clamping linkage mechanism drives the left holding components (11) and the right holding components (12) of all the holding units (1) to switch synchronously between an open clamping state and a closed clamping state. The clamping linkage mechanism comprises a clamping linkage rod (61). The clamping linkage rod (61) is extended and arranged along the arrangement direction of the holding units (1). The clamping linkage rod (61) is provided with an actuating part (62) associated with the left holding component (11) and the right holding component (12). The clamping linkage rod (61) drives the left holding component (11) and the right holding component (12) to switch synchronously between an open clamping state and a closed clamping state through the actuating part (62) in a manner of rotating around its own axis or moving along the axis.

12. The packaging machine conveying module according to claim 1, characterized in that: The module base (101) is also provided with a scraper mechanism (71).

13. The packaging machine conveying module according to claim 12, characterized in that: The scraper mechanism (71) comprises a fixed body (711) and a sliding body (712), wherein the fixed body (711) is connected to the module base (101), and the sliding body (712) is slidably connected to the fixed body (711); When the packaging machine conveying module is in a preset positive posture, the sliding body (712) automatically slides relative to the fixed body (711) to switch to an unfolded state; when the packaging machine conveying module is in a preset negative posture, the sliding body (712) automatically slides relative to the fixed body (711) to switch to a recovered state.

14. A packaging machine conveying device, characterized in that: It comprises the packaging machine conveying module (100) as claimed in claim 1, and also comprises a circulating conveying mechanism (200), wherein the packaging machine conveying module (100) is arranged on the circulating conveying mechanism (200) so as to be driven thereby to move in a circulation manner, and a retractable driving mechanism (300) is arranged next to the circulating conveying mechanism (200) for driving the retractable linkage mechanism to move.

15. The packaging machine conveying device according to claim 14, characterized in that: The expansion and contraction driving mechanism (300) comprises one or a combination of a power actuating mechanism (301) and a guiding member (302) arranged along the conveying path of the circulating conveying mechanism (200).

16. The packaging machine conveying device according to claim 15, characterized in that: The power actuation mechanism (301) comprises a toggle member (3011) and a power assembly (3012); the toggle member (3011) is adjustably connected to the power assembly (3012) and is driven to move thereby; The shifting member (3011) comprises two shifting rods which are arranged at intervals and parallel to the conveying direction of the circulating conveying mechanism (200); The toggle member (3011) comprises a hoop portion (3013), the power assembly (3012) comprises a pull rod, and the hoop portion (3013) is adjustably connected to the pull rod in an engaging manner; The guide component (302) comprises one of a guide rail and a guide groove, and the guide component (302) is adjustably arranged beside the circulating conveying mechanism (200).

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