An automatic bagging apparatus

Abstract

The utility model relates to an automatic bagging device, including frame, be provided with the flat storage bag mechanism who is used for transverse conveying the package bag of stacking flat laying, be provided with the jacking mechanism who is used for realizing package bag lifting in the output of flat storage bag mechanism, be provided with the bag taking mechanism who is used for sucking package bag in the upside of jacking mechanism to setting up the bag mechanism who is used for conveying the package bag of longitudinal backward to the package bag that sucks, this device can realize the bagging delivery of package bag, can reduce manual operation content, greatly saves manual operation cost.

Description

Technical Field

[0001] This utility model relates to an automatic bag-feeding device. Background Technology

[0002] Fully automatic packaging machines can automatically pick up bags, open bags, fill bags, and seal bags. Currently, the bag storage mechanism in existing fully automatic packaging machines is usually a single-station design. This means that an operator or robotic arm places stacked bags in the storage area, and then a suction mechanism (such as suction cups) transfers them. Due to this single-station design, once all the bags in that station are used up (i.e., completely transferred by the suction cups), subsequent equipment operation needs to be paused to replenish the bags, thus affecting equipment efficiency. Examples include utility model patents such as CN212667813U ("Fully Automatic Bag Loading Machine"), CN221294300U ("Ton Bag Storage Bag Separation Mechanism"), and CN214452272U ("A Packaging Machine Applicable to the Retail and Takeout Industry").

[0003] Furthermore, in existing automatic bag-feeding machines, the suction cups used for bag picking are positioned in a fixed location. After several suction cycles, the height of the bag decreases, resulting in situations where the suction cups can no longer pick up the bag. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic bag-loading device, which realizes the bag loading and conveying of packaging bags, reduces manual work, and greatly saves labor costs.

[0005] The technical solution of this utility model is as follows: an automatic bag feeding device, including a frame, on which a flat bag storage mechanism for horizontally conveying stacked and laid-out packaging bags is provided, a lifting mechanism for lifting the packaging bags is provided at the output end of the flat bag storage mechanism, a bag picking mechanism for picking up the packaging bags is provided on the upper side of the lifting mechanism, and a bag feeding mechanism for longitudinally conveying the picked-up packaging bags backward is provided.

[0006] Furthermore, the flat-laying storage mechanism includes a circulating chain conveyor belt horizontally mounted on a frame. Multiple bag-pushing rods are vertically installed at equal intervals on the circulating chain conveyor belt. The upper surface of the circulating chain conveyor belt is sequentially provided with multiple sets of horizontal bag-storage stations and a set of bag-preparation stations for stacked and flat-laying packaging bags. The circulating chain conveyor belt is driven by a first motor, and each time the first motor operates, the bag-pushing rods move forward one station.

[0007] Furthermore, a lifting mechanism for lifting the packaging bag is provided at the output end of the flat storage bag mechanism. The lifting mechanism includes a lifting plate that slides up and down with the frame via a guide rail slider mechanism. A rotating shaft driven by a drive mechanism is provided on the frame. One end of a rotating crank is radially fixed on the rotating shaft, and the other end of the rotating crank is hinged to one end of a swing rod. The other end of the swing rod is hinged to the bottom surface of the lifting plate.

[0008] Furthermore, the bag-retrieving mechanism includes a horizontally arranged mounting plate. A first connecting rod and a second connecting rod are hinged to the lower side of the mounting plate. The lower end of the first connecting rod is hinged to the rear end of a forward-extending third connecting rod. A pair of suction cups are fixed to the front end of the third connecting rod. The lower end of the second connecting rod is hinged to the end of the third connecting rod near the first connecting rod. A first longitudinal cylinder that drives the first connecting rod to lift the suction cups is hinged to the lower side of the mounting plate away from the first connecting rod.

[0009] Furthermore, the bag feeding mechanism includes two longitudinally parallel transmission chains that are driven to rotate by a synchronization mechanism. A first bag feeding chain plate assembly and a second bag feeding chain plate assembly are installed between the two transmission chains. A first clearance notch and a second clearance notch are provided between the rear end of the first bag feeding chain plate assembly and the front end of the second bag feeding chain plate assembly, and between the front end of the first bag feeding chain plate assembly and the rear end of the second bag feeding chain plate assembly.

[0010] Furthermore, a bag-hanging and storage mechanism for laterally conveying stacks of suspended packaging bags is provided above the rear side of the frame, and a bag-picking and lowering mechanism for picking up suspended packaging bags and feeding them into the bag-feeding mechanism is provided at the front end of one end of the bag-hanging and storage mechanism.

[0011] Furthermore, the bag hanging and storage mechanism includes a horizontal frame and a chain conveyor mounted on the horizontal frame. Multiple cantilever bag hanging rods are horizontally installed at equal intervals on the chain of the chain conveyor. The cantilever bag hanging rods are used to suspend stacks of packaging bags. Multiple bag hanging stations and one bag picking station are sequentially arranged at the lower part of the chain conveyor. Each bag hanging station and each bag picking station corresponds to one cantilever bag hanging rod. The chain conveyor is driven by a drive motor, and each time the drive motor operates, the cantilever bag hanging rod moves one station forward.

[0012] Furthermore, the transverse frame is provided with a bag-pushing mechanism at the bag-picking station for pushing the stack of suspended packaging bags toward the free end of the cantilever bag-hanging rod. The outer end of the bag-pushing mechanism is provided with a limiting plate that is driven to extend and retract by a limiting cylinder.

[0013] Furthermore, the bag pushing mechanism includes a bag pushing frame, a bag pushing cylinder, a bag pushing plate, and a bag pushing plate lifting cylinder. The guide rod of the bag pushing cylinder is fixedly installed on the bag pushing frame at both ends, and the bag pushing cylinder slides on the guide rod. The bag pushing plate lifting cylinder is fixedly connected to the bag pushing cylinder, and the telescopic rod of the bag pushing plate lifting cylinder is fixedly connected to the bag pushing plate. The bag pushing plate acts on the rear side of the entire stack of packaging bags.

[0014] Furthermore, the bag-retrieving and lowering mechanism includes a vertical arm, on both sides of which a second longitudinal cylinder is fixed. A longitudinal suction cup is mounted on the telescopic rod of the second longitudinal cylinder via a fixed plate. A third longitudinal cylinder that can be raised and lowered is located between the two longitudinal suction cups. A mounting base is fixed on the telescopic rod of the third longitudinal cylinder. A lower clamping block is fixed on the lower side of the mounting base. An upper clamping block driven by a rotary cylinder is located on the upper side of the lower clamping block. The upper clamping block and the lower clamping block are used to cooperate to clamp the handle part of the suspended packaging bag.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. This automatic bag feeding device can feed and transport bags with and without handles. It can switch between bag feeding with and without handles according to production needs. After the workers place the bags in the flat storage mechanism or the hanging storage mechanism, the subsequent automatic production steps can be realized, which can reduce manual work and save labor costs.

[0017] 2. This automatic bag loading device, by setting up a flat bag storage mechanism for laterally conveying stacked and flat packaging bags (packaging bags without handles), can realize the delivery of prepared packaging bags from the horizontal bag storage station to the bag preparation station for equipment to pick up bags. This allows operators to place multiple stacks of packaging bags at once, reducing the number of operations; and it does not require stopping the operation of subsequent equipment, thus improving the working efficiency of the equipment.

[0018] 3. This automatic bag-loading device, by setting up a lifting mechanism, can raise the height of stacked packaging bags so that the suction cups can pick up the packaging bags, thus avoiding the situation where the suction cups cannot pick up the packaging bags.

[0019] 4. This automatic bag-loading device, through the cooperation of the bag-picking mechanism and the bag-feeding mechanism, can pick up the flat packaging bags and then use the rotation of the transmission chain to make the packaging bags fall into the bag-feeding chain plate of the bag-feeding mechanism and be transported backward to the bag-loading swing arm mechanism.

[0020] 5. This automatic bag-loading device features a bag-hanging and storage mechanism on the upper side of the frame for laterally conveying stacked and suspended packaging bags (bags with handles). Operators can hang multiple stacks of packaging bags onto multiple cantilevered bag-hanging rods at once. A chain conveyor, driven by a motor and equipped with cantilevered bag-hanging rods at intervals, transports the prepared packaging bags from the bag-hanging station to the bag-retrieving station for subsequent equipment retrieval. This allows operators to place multiple stacks of packaging bags at once, reducing the number of operations required.

[0021] 6. This automatic bag-loading device, through the cooperation of a bag-picking and lowering mechanism and a bag-feeding mechanism, can transfer suspended packaging bags (packaging bags with handles) from the bag-hanging and storage mechanism to the bag-feeding mechanism, and then use the bag-feeding mechanism to convey them towards the bag-loading swing arm mechanism. At the same time, the bag-loading swing arm mechanism can realize the bag-loading operation of the backward conveyed packaging bags to the subsequent mechanisms. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0024] Figure 3 The three-dimensional structure of the flat storage bag mechanism of this utility model Figure 1 ;

[0025] Figure 4 The three-dimensional structure of the flat storage bag mechanism of this utility model Figure 2 ;

[0026] Figure 5 This is a schematic cross-sectional view of the flat storage bag mechanism of this utility model;

[0027] Figure 6 This is a three-dimensional structural diagram of the lifting mechanism of this utility model;

[0028] Figure 7 This is a schematic diagram of the lowering state of the lifting plate (horizontal hollow plate) of this utility model;

[0029] Figure 8 This is a schematic diagram of the lifting plate (horizontal hollow plate) of this utility model in the rising state;

[0030] Figure 9 This is a rear view of the bag-taking mechanism of this utility model;

[0031] Figure 10 This is a side view of the bag-taking mechanism of this utility model before it takes a bag;

[0032] Figure 11This is a side view of the bag-removing mechanism of this utility model after removing the bag;

[0033] Figure 12 This is a perspective view of the bag feeding mechanism of this utility model;

[0034] Figure 13 This is a perspective view of the bag-hanging storage mechanism of this utility model;

[0035] Figure 14 This is a partial enlarged view of the bag-hanging and storage mechanism of this utility model;

[0036] Figure 15 This is a front view of the bag-hanging and storage mechanism of this utility model;

[0037] Figure 16 This is a bottom perspective view of the cantilever bag-hanging rod and the bag-pushing frame of this utility model;

[0038] Figure 17 This is an enlarged version of the bag-retrieving and lowering mechanism of this utility model. Figure 1 ;

[0039] Figure 18 This is a partially enlarged view of the bag-collecting and lowering mechanism of this utility model;

[0040] Figure 19 This is a side view of the bag-collecting and lowering mechanism of this utility model;

[0041] In the diagram: 1-Packaging bag; 10-Frame; A-Plain bag storage mechanism; A2-Circulating chain conveyor belt; A3-Pushing bar; A4-Layered and flat-laid packaging bags; A5-Horizontal bag storage station; A6-Bag preparation station; A7-First motor; A8-Base frame; A10-Support leg; A11-Roller seat; A12-Roller; A13-Sprocket; A14-Chain; A15-Vertical support column; A16-Packaging bag horizontal support plate; A17-Horizontal perforated plate; A18-Strip seam; A19-Racetrack-shaped hole; A20-Blocking strip.

[0042] B-Lifting Mechanism B10-Lifting Plate B11-Hinge Seat B21-Rotating Shaft B22-Rotating Crank B23-Swing Rod B24-Guide Rail B25-Slider B26-Slider Fixing Seat B27-Drive Motor;

[0043] C - Bag-taking mechanism; C10 - Mounting plate; C11 - First connecting rod; C12 - Second connecting rod; C13 - Third connecting rod; C14 - Suction cup; C15 - First longitudinal cylinder;

[0044] D - Bag feeding mechanism; D10 - Transmission chain; D11 - Servo motor; D12 - Synchronous belt mechanism; D13 - Drive shaft; D14 - Drive sprocket; D15 - Driven sprocket; D16 - Connecting plate; D17 - First crossbar; D18 - First flexible fabric; D19 - First bag feeding chain plate assembly; D20 - Second crossbar; D21 - Second flexible fabric; D22 - Second bag feeding chain plate assembly; D23 - First clearance notch; D24 - Second clearance notch; D25 - Sensor;

[0045] E-Bag hanging and storage mechanism; E1-Horizontal frame; E2-Chain conveyor; E3-Cantilever bag hanging rod; E4-Stacked packaging bags; E5-Bag hanging station; E6-Bag taking station; E7-Roller; E8-Sprocket; E9-Chain; E10-Drive motor; E11-Mounting component; E12-Roller; E13-Guide rod; E14-Guide wheel; E15-Push bag mechanism; E16-Push bag frame; E17-Push bag cylinder; E18-Push bag plate; E19-Push bag plate lifting cylinder; E20-Limit cylinder; E21-Limit plate; E22-Synchronous belt mechanism;

[0046] F - Bag retrieval and lowering mechanism; F10 - Vertical arm; F11 - Second longitudinal cylinder; F12 - Fixed plate; F13 - Longitudinal suction cup; F14 - Third longitudinal cylinder; F15 - Mounting seat; F16 - Lower clamping block; F17 - Rotary cylinder; F18 - Upper clamping block; F19 - Limiting frame; F20 - Lifting mechanism. Detailed Implementation

[0047] To make the above-mentioned features and advantages of this utility model more easily understood, specific embodiments are described below in conjunction with the accompanying drawings, but this utility model is not limited thereto.

[0048] refer to Figures 1 to 19

[0049] An automatic bag-feeding machine includes a frame 10. A bag-laying and storage mechanism A is mounted on the frame for laterally conveying stacked packaging bags. A lifting mechanism B is located at the output end of the bag-laying and storage mechanism to receive and lift the stacked packaging bags. A bag-picking mechanism C is located above the lifting mechanism for picking up the packaging bags, and a bag-feeding mechanism D is located above the lifting mechanism for longitudinally conveying the picked-up packaging bags backward. See also... Figure 1 and Figure 2 .

[0050] In this embodiment, to achieve bag storage and delivery for handle-less packaging bags, the flat-laying bag storage mechanism includes a horizontally mounted circulating chain conveyor belt A2. Multiple pusher rods A3 are vertically mounted at equal intervals on the circulating chain conveyor belt. The upper surface of the circulating chain conveyor belt is sequentially provided with multiple sets of stacked packaging bags A4 at horizontal storage positions A5 and a set of bag preparation positions A6. The circulating chain conveyor belt is driven by a first motor A7, and each operation of the first motor causes the pusher rods to advance one position, i.e., move one unit along the running direction of the circulating chain conveyor belt (this one unit represents moving from one horizontal storage position to the next, or from the horizontal storage position to the bag preparation position). See also Figure 3 , Figure 4 and Figure 5 .

[0051] Specifically, the frame is equipped with a base frame A8 and a circulating chain conveyor belt on the base frame. Multiple support legs A10 are provided below the base frame. The left and right sides of the upper surface of the base frame are respectively equipped with roller seats A11, rotating rollers A12 rotatably connected to the roller seats, and two sprockets A13 fixed at intervals on the rotating rollers. Chains A14 are installed on the two sprockets on both sides. The first motor drives a rotating roller to rotate. Multiple pusher rods are fixed parallel to each other at equal intervals on the chain.

[0052] To ensure a reasonable design and smooth pushing of the stacked packaging bags, multiple vertical support columns A15 are provided on the upper surface of the aforementioned base frame. At the horizontal bag storage station, a horizontal support plate A16 for the packaging bags is fixedly installed on the upper surface of the multiple vertical support columns. At the bag preparation station, a horizontal perforated plate A17 is provided on the upper surface of the multiple vertical support columns. The horizontal support plate and the horizontal perforated plate are located directly above the base frame, and both the horizontal support plate and the horizontal perforated plate are provided with strip seams A18 to avoid the movement of the bag pusher rod. The strip seam in the horizontal bag storage station runs through the beginning and end of the horizontal support plate, and the end of the strip seam on the horizontal support plate connects with the strip seam in the horizontal perforated plate.

[0053] The horizontal perforated plate has multiple racetrack-shaped holes A19, and some of these racetrack-shaped holes are fixedly installed with baffles A20 for limiting the stacked and laid-out packaging bags in the bag preparation station.

[0054] When the flat-laying bag storage mechanism is working, the operator can place multiple stacks of packaging bags on multiple sets of horizontal bag storage stations at one time. The first motor drives the circulating chain conveyor belt, which is equipped with pusher bars at intervals. These pusher bars can transport the prepared packaging bags from the horizontal bag storage stations to the bag preparation stations for equipment to pick up the bags (such as by suction cups). This allows the operator to place multiple stacks of packaging bags at once, reducing the number of operations and eliminating the need to stop the operation of subsequent equipment, thus improving the efficiency of the equipment.

[0055] When the equipment is in operation, the first motor drives the chain to rotate a set stroke. The pusher bar on the chain moves each stack of packaging bags one step towards the bag preparation station, so that there is a stack of packaging bags available for retrieval at the bag preparation station. After the packaging bags at the bag preparation station are used up, the first motor drives the pusher bar again, pushing the packaging bags at the horizontal bag storage station one stroke towards the bag preparation station, so that there are packaging bags available for use at the bag preparation station again. Since the chain is a circulating type, the pusher bar on the chain can also be reused.

[0056] In this embodiment, the lifting mechanism includes a lifting plate B10 disposed on the bag preparation station. The lifting plate slides vertically with the frame via a guide rail slider mechanism. The lifting plate B10 is a horizontally perforated plate A17. A rotating shaft B21 driven by a drive mechanism is disposed on the frame. One end of a rotating crank B22 is radially fixed to the rotating shaft, and the other end of the rotating crank is hinged to one end of a swing rod B23. A hinge seat B11 is fixed to the bottom surface of the lifting plate, and the other end of the swing rod is hinged to the hinge seat. When the drive motor drives the rotating shaft to rotate clockwise, the rotating crank drives the rotating shaft to push the lifting plate upward; conversely, when the rotating shaft rotates counterclockwise, it drives the lifting plate downward. The drive motor is a servo motor or a synchronous motor to drive the rotating shaft to achieve forward and reverse rotation and control the rotation angle, so that for each rotation angle, the lifting plate is lifted upward a certain distance, thus better cooperating with the bag-retrieving mechanism for bag retrieval. See also Figure 6 , Figure 7 and Figure 8 .

[0057] In this embodiment, in order to guide the lifting plate, the guide rail slider mechanism includes guide rails B24 vertically fixed on both sides of the lifting plate. Sliders B25, which are fixedly connected to the frame, are slidably connected to the guide rails. The sliders are fixedly connected to the frame via slider fixing seats B26, thereby realizing the connection between the sliders and the frame, so that the lifting plate can move up and down along the guide rails.

[0058] In this embodiment, the driving mechanism is a drive motor B27 fixed on the frame, and the output shaft of the drive motor is connected to the rotating shaft via a reducer. Specifically, the output shaft via the reducer is connected to the rotating shaft via a coupling, thereby driving the rotating shaft to rotate. The two ends of the rotating shaft are rotatably connected to the frame via bearing seats, and the rotating shaft and the rotating crank are integrated, with the rotating crank located in the middle of the rotating shaft.

[0059] In this embodiment, the axis of the rotating shaft and the axis of the swing rod hinged to the hinge seat are not on the same vertical plane. That is, the hinge seat is not directly above the rotating shaft. Specifically, the hinge seat can be set in the center of the bottom surface of the lifting plate, which helps to ensure the stability of the lifting.

[0060] In this embodiment, the bag-retrieving mechanism includes a mounting plate C10 horizontally mounted on the upper side of the bag-feeding mechanism. A first connecting rod C11 and a second connecting rod C12 are hinged to the lower side of the mounting plate. The lower end of the first connecting rod is hinged to the rear end of a third connecting rod C13 extending forward and downward. A pair of downward-facing suction cups C14 are fixed to the front end of the third connecting rod. The lower end of the second connecting rod is hinged to the end of the third connecting rod near the first connecting rod. A first longitudinal cylinder C15 is hinged to the lower side of the mounting plate away from the first connecting rod. The telescopic rod of the first longitudinal cylinder is hinged to the upper part of the first connecting rod. See also... Figure 9 , Figure 10 and Figure 11 .

[0061] In this embodiment, the bag feeding mechanism includes two longitudinally parallel transmission chains D10 that are driven to rotate by a synchronization mechanism. The synchronization mechanism includes a drive shaft D13 that is driven to rotate by a servo motor D11 via a synchronization belt mechanism D12. Both sides of the drive shaft are fixed with driving sprockets D14. Three driven sprockets D15 are installed on each transmission chain on the frame, thereby driving the transmission chains to rotate via the servo motor. Each transmission chain has a connecting plate D16 installed between two adjacent links. The connecting plate is rotatably connected to the shaft of the link. In a section between two transmission chains, two adjacent connecting plates are fixed with a first crossbar D17. A first flexible fabric body D18 is installed on the upper side of the first crossbars. The first flexible fabric body and the first crossbars cooperate to form a first bag feeding chain plate assembly D19. In another section between two adjacent connecting plates, two second crossbars D20 are fixed. A second flexible fabric body D21 is installed on the upper side of the second crossbars. The second flexible fabric body and the second crossbars cooperate to form a second bag feeding chain plate assembly D22. A first clearance notch D23 and a second clearance notch D24 are provided between the rear end of the first bag feeding chain plate assembly and the front end of the second bag feeding chain plate assembly, as well as between the front end of the first bag feeding chain plate assembly and the rear end of the second bag feeding chain plate assembly, for the bag picking mechanism to pass through, so that the bag picking mechanism can pick up the bag. The frame is equipped with a sensor D25 for detecting the first and second clearance gaps. See also Figure 12 .

[0062] When the first clearance notch moves to the lower side of the bag-retrieving mechanism, the first longitudinal cylinder telescopic rod retracts. The first connecting rod, in conjunction with the second connecting rod, drives the lower end of the third connecting rod to tilt downwards and pass through the first clearance notch. The suction cup moves vertically downwards, and the suction cup uses negative pressure to adsorb the front part of the topmost flat packaging bag. See [link / reference]. Figure 10 The first longitudinal cylinder extension rod extends, and the first connecting rod, in conjunction with the second connecting rod, drives the third connecting rod to rotate. The suction cup lifts the rear of the attached packaging bag backward and upward. (See below) Figure 11The drive chain of the bag feeding mechanism rotates forward a certain distance, causing all the suction bags to fall onto the first bag feeding chain assembly. The suction cups disconnect, and the bags are laid out on the first bag feeding chain assembly. The drive chain then rotates forward a certain distance, positioning the second clearance notch below the bag picking mechanism. The first bag feeding chain assembly then feeds the bags into the rear upper bag swing arm mechanism. This process is repeated to convey the flattened bags backward.

[0063] In this embodiment, in order to be compatible with the storage and conveying of packaging bags with handles, a bag hanging and storage mechanism E for horizontally conveying stacks of suspended packaging bags is provided on the upper rear side of the frame, and a bag picking and lowering mechanism F for picking up suspended packaging bags and feeding them into the bag feeding mechanism is provided on the front side of one end of the bag hanging and storage mechanism.

[0064] Specifically, the bag-hanging and storage mechanism includes a transverse frame E1 and a chain conveyor E2 mounted on the transverse frame. The chain conveyor includes rollers E7 rotatably mounted on the left and right sides of the transverse frame and sprockets E8 fixed on the rollers. A chain E9 is installed between the two sprockets. One roller is driven to rotate by a drive motor E10 via a synchronous belt mechanism E22. The output end of the drive motor is connected to the roller via chain drive or belt drive. See also Figure 13 .

[0065] The chain conveyor has multiple cantilever bag-hanging rods E3 horizontally installed at equal intervals along its chain. The length direction of the cantilever bag-hanging rod is the width direction of the chain E9. These rods are used to suspend stacks of packaging bags E4 (i.e., multiple packaging bags stacked vertically and parallel to each other). The lower part of the chain conveyor has multiple bag-hanging stations E5 (four are shown in the figure) and one bag-removing station E6. Each bag-hanging station and each bag-removing station corresponds to one cantilever bag-hanging rod. The chain conveyor is driven by a drive motor E10, and each operation of the drive motor causes the cantilever bag-hanging rod to move laterally one station. That is, it moves laterally one unit along the running direction of the chain conveyor (this one unit represents moving from one bag-hanging station to the next, or from the last bag-hanging station to the bag-removing station).

[0066] To ensure smooth rotation, multiple cantilever bag-hanging rods are fixed parallel to the chain E9 at equal intervals via mounting pieces E11. These mounting pieces can be clips or similar components fixed to the chain, and are secured to the chain with screws. Rollers E12 are fitted onto the cantilever bag-hanging rods near the chain (i.e., rollers E12 are fitted onto the shaft between the mounting piece and the cantilever bag-hanging rod), and the rollers can rotate relative to the mounting piece and the cantilever bag-hanging rods.

[0067] A guide rod E13 (specifically a long metal rod with a circular cross-section) is provided on the side of the chain on the horizontal frame. The roller is supported by the guide rod and rolls (so that the guide rod supports the roller and the cantilever bag hanging rod, increasing the cantilever support effect). The free end of the roller shaft is coaxially mounted with a guide wheel E14. When the cantilever bag hanging rod rotates to the position of the roller shaft, the roller and the guide wheel abut against each other and rotate.

[0068] In order to push the packaging bags, the above-mentioned transverse frame is equipped with a bag pushing mechanism E15 at the bag picking station to push the stack of suspended packaging bags toward the free end of the cantilever bag hanging rod. The bag pushing mechanism E15 can be an electric push cylinder or a pneumatic cylinder. Through the action of the bag pushing mechanism E15, the packaging bags can be brought closer to the free end of the cantilever bag hanging rod E3, thereby facilitating the adsorption of subsequent equipment (such as suction cup adsorption).

[0069] Specifically, the bag-pushing mechanism includes a bag-pushing frame E16, a bag-pushing cylinder E17, a bag-pushing plate E18, and a bag-pushing plate lifting cylinder E19. The guide rod E171 of the bag-pushing cylinder is fixedly mounted on the bag-pushing frame at both ends, and the bag-pushing cylinder slides on the guide rod. The bag-pushing plate lifting cylinder E19 is fixedly connected to the bag-pushing cylinder, and the telescopic rod of the bag-pushing plate lifting cylinder is fixedly connected to the bag-pushing plate. The bag-pushing plate acts on the rear side of the entire stack of packaging bags. See also... Figure 14 .

[0070] To prevent the pushing force of the bag-pushing cylinder and the bag-pushing plate from pushing the outermost (front) packaging bag away from the outer end of the cantilever bag-hanging rod, the outer end of the bag-pushing mechanism is equipped with a limiting plate that is driven to extend and retract by a limiting cylinder. Specifically, a limiting plate E21 (which can be made of silicone or rubber) is provided at the outer end of the bag-pushing frame and is driven to extend and retract by an obliquely positioned limiting cylinder E20. The limiting plate E21 abuts against the upper side of the outer end of the cantilever bag-hanging rod (the outer end of the cantilever bag-hanging rod has a partially upturned section) and abuts against the upper part of the handle of the outermost packaging bag. See also Figure 16 .

[0071] When the bag hanging and storage mechanism is working, the operator hangs multiple stacks of packaging bags on multiple cantilever bag hanging rods at one time. The chain conveyor is driven by a drive motor. The chain conveyor is equipped with cantilever bag hanging rods at intervals, which can send the prepared packaging bags from the bag hanging station to the bag picking station for subsequent bag picking and lowering mechanism to pick up the bags. The bag retrieval method for stacked packaging bags suspended at the bag retrieval station is as follows: The limiting cylinder drives the limiting plate to abut against the upper side of the outer end of the cantilever bag hanging rod (to prevent the pushing force of the bag pushing cylinder and the bag pushing plate from pushing the outermost (front) packaging bag away from the outer end of the cantilever bag hanging rod). The bag pushing cylinder moves closer to the inner end of the cantilever bag hanging rod, and the telescopic rod of the bag pushing plate lifting cylinder extends to push the entire stack of packaging bags, so that the handle of the outermost packaging bag abuts against the limiting plate. When the longitudinal suction cup is about to pick up the outermost (front) packaging bag, the bag pushing cylinder moves backward, and the limiting cylinder E20 drives the limiting plate to retract, so that the limiting plate does not abut against the packaging bag at the outer end of the cantilever bag hanging rod. As the outermost packaging bag of the entire stack is picked up by the longitudinal suction cup, the limiting cylinder drives the limiting plate to extend, and at the same time the bag pushing cylinder drives the bag pushing plate to push forward, so as to keep the outermost (front) packaging bag always in a position that the longitudinal suction cup can pick up.

[0072] In this embodiment, the bag-retrieving and lowering mechanism includes a vertical arm F10, with second longitudinal cylinders F11 fixed on both sides of the vertical arm. A longitudinal suction cup F13 is mounted on the telescopic rod of the second longitudinal cylinder via a fixing plate F12. A third longitudinal cylinder F14, capable of being raised and lowered, is located between the two longitudinal suction cups. Specifically, the vertical arm is equipped with a lifting mechanism F20 that drives the third longitudinal cylinder to rise and fall, such as a synchronous belt mechanism or transmission chain driven by a servo motor. The third longitudinal cylinder is fixed to the synchronous belt or transmission chain of the synchronous belt mechanism, thereby achieving raising and lowering. A mounting base F15 is fixed to the telescopic rod of the third longitudinal cylinder. A horizontally arranged lower clamping block F16 is fixed to the lower side of the mounting base. An upper clamping block F18, driven by a rotary cylinder F17, is horizontally arranged above the lower clamping block. The rotary cylinder is horizontally arranged, and its rotating shaft is fixedly connected to the upper clamping block via a swing arm. The upper and lower clamping blocks are used to clamp the handle part of the suspended packaging bag. Both the upper and lower clamping blocks are provided with a rubber layer. A rearwardly protruding limiting frame F19 is provided on the rear side of the vertical arm and located above the bag feeding mechanism so that the lower part of the packaging bag can fall onto the bag feeding chain plate. See Figure 17 and Figure 18 .

[0073] The extension rod of the second longitudinal cylinder extends, and the longitudinal suction cup, under negative pressure, attracts the outermost packaging bag among the suspended stacked packaging bags. The extension rod of the second longitudinal cylinder then retracts. The extension rod of the third longitudinal cylinder extends, and the rotary cylinder drives the upper clamping block to rotate and cooperate with the lower clamping block to clamp the handle of the packaging bag. The negative pressure of the longitudinal suction cup is released, and the third longitudinal cylinder descends. The bottom of the packaging bag contacts the first or second bag feeding chain assembly on the bag feeding mechanism. As the transmission chain rotates and the third longitudinal cylinder continues to descend to its lowest position and the upper and lower clamping blocks separate, the entire packaging bag falls onto the first or second bag feeding chain assembly. It continues to move backward through the transmission chain, and the packaging bag with the handle is fed into the upper bag swing arm mechanism. After the third longitudinal cylinder reaches its lowest position, its extension rod retracts. Then, the lifting mechanism drives the third longitudinal cylinder and the rotary cylinder to rise to their highest position to clamp the next packaging bag.

[0074] If the terms "first" and "second" are used in the above description to define the components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of distinguishing the components in the description. Unless otherwise stated, the above terms have no special meaning.

[0075] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws) or a non-detachable fixed connection (e.g., riveting or welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0076] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0077] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0078] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. An automatic bag-feeding device, comprising a frame, characterized in that, The frame is equipped with a flat storage mechanism for laterally conveying stacked packaging bags. A lifting mechanism for lifting the packaging bags is located at the output end of the flat storage mechanism. A bag picking mechanism for picking up the packaging bags is located above the lifting mechanism. A bag feeding mechanism for longitudinally conveying the picked-up packaging bags backward is also provided.

2. The automatic bag-feeding device according to claim 1, characterized in that, The flat-laying bag storage mechanism includes a circulating chain conveyor belt horizontally installed on a frame. Multiple bag pushers are vertically installed at equal intervals on the circulating chain conveyor belt. The upper surface of the circulating chain conveyor belt is provided with multiple sets of horizontal bag storage stations and a set of bag preparation stations for stacked and flat-laying packaging bags. The circulating chain conveyor belt is driven by a first motor, and each time the first motor operates, the bag pusher moves one station forward.

3. An automatic bag-feeding device according to claim 1 or 2, characterized in that, The lifting mechanism includes a lifting plate that slides up and down with the frame via a guide rail slider mechanism. The frame is provided with a rotating shaft driven to rotate by a drive mechanism. One end of a rotating crank is radially fixed on the rotating shaft, and the other end of the rotating crank is hinged to one end of a swing rod. The other end of the swing rod is hinged to the bottom surface of the lifting plate.

4. The automatic bag-feeding device according to claim 1, characterized in that, The bag-retrieving mechanism includes a horizontally arranged mounting plate. A first connecting rod and a second connecting rod are hinged to the lower side of the mounting plate. The lower end of the first connecting rod is hinged to the rear end of a forward-extending third connecting rod. A pair of suction cups are fixed to the front end of the third connecting rod. The lower end of the second connecting rod is hinged to the end of the third connecting rod near the first connecting rod. A first longitudinal cylinder is hinged to the lower side of the mounting plate away from the first connecting rod to drive the first connecting rod to lift the suction cups.

5. An automatic bag-feeding device according to claim 1 or 4, characterized in that, The bag feeding mechanism includes two longitudinally parallel transmission chains that are driven to rotate by a synchronization mechanism. A first bag feeding chain plate assembly and a second bag feeding chain plate assembly are installed between the two transmission chains. A first clearance notch and a second clearance notch are provided between the rear end of the first bag feeding chain plate assembly and the front end of the second bag feeding chain plate assembly, and between the front end of the first bag feeding chain plate assembly and the rear end of the second bag feeding chain plate assembly.

6. An automatic bag-feeding device according to claim 1, characterized in that, A bag-hanging and storage mechanism for laterally conveying stacks of suspended packaging bags is provided above the rear side of the frame. A bag-picking and lowering mechanism for picking up suspended packaging bags and feeding them into the bag-feeding mechanism is provided at one end of the bag-hanging and storage mechanism.

7. An automatic bag-feeding device according to claim 6, characterized in that, The bag hanging and storage mechanism includes a horizontal frame and a chain conveyor mounted on the horizontal frame. Multiple cantilever bag hanging rods are horizontally installed at equal intervals on the chain of the chain conveyor. The cantilever bag hanging rods are used to suspend stacks of packaging bags. Multiple bag hanging stations and one bag picking station are arranged sequentially at the lower part of the chain conveyor. Each bag hanging station and each bag picking station corresponds to one cantilever bag hanging rod. The chain conveyor is driven by a drive motor, and each time the drive motor operates, the cantilever bag hanging rod moves one station forward.

8. An automatic bag-feeding device according to claim 7, characterized in that, The transverse frame is located at the bag-picking station and is equipped with a bag-pushing mechanism for pushing the stack of suspended packaging bags toward the free end of the cantilever bag-hanging rod. The outer end of the bag-pushing mechanism is provided with a limiting plate that is driven to extend and retract by a limiting cylinder.

9. An automatic bag-feeding device according to claim 8, characterized in that, The bag pushing mechanism includes a bag pushing frame, a bag pushing cylinder, a bag pushing plate, and a bag pushing plate lifting cylinder. The guide rod of the bag pushing cylinder is fixedly installed on the bag pushing frame at both ends, and the bag pushing cylinder slides on the guide rod. The bag pushing plate lifting cylinder is fixedly connected to the bag pushing cylinder, and the telescopic rod of the bag pushing plate lifting cylinder is fixedly connected to the bag pushing plate. The bag pushing plate acts on the rear side of the entire stack of packaging bags.

10. An automatic bag-feeding device according to claim 6, 7, 8 or 9, characterized in that, The bag-retrieving and lowering mechanism includes a vertical arm, on both sides of which a second longitudinal cylinder is fixed. A longitudinal suction cup is mounted on the telescopic rod of the second longitudinal cylinder via a fixed plate. A third longitudinal cylinder that can be raised and lowered is located between the two longitudinal suction cups. A mounting base is fixed on the telescopic rod of the third longitudinal cylinder. A lower clamping block is fixed on the lower side of the mounting base. An upper clamping block driven by a rotary cylinder is located on the upper side of the lower clamping block. The upper and lower clamping blocks are used to cooperate to clamp the handle part of the suspended packaging bag.

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