Automatic stacking system for paper bags

Abstract

The automatic paper bag stacking system comprises a first conveying belt, a turnover mechanism, an aligning mechanism, a clamping mechanism and a second conveying belt which are arranged in sequence, a first sensor and a second sensor are installed at the front end and the rear end of the first conveying belt correspondingly, and turntables driven by a first motor are symmetrically installed on the turnover mechanism; first transmission roller assemblies capable of sliding close to each other are symmetrically installed between the rotating discs, a push plate and a baffle which can move left and right are installed on the front side and the rear side of the aligning mechanism respectively, a third sensor is installed on the second conveying belt, and after trays are conveyed to the stacking position by the second conveying belt, paper bags pass through the overturning mechanism and the aligning mechanism and then are conveyed to the stacking position. The paper bags are stacked on the trays through the clamping mechanism, after all stacking is completed on one tray, the second tray is conveyed to the stacking position through the second conveying belt, the paper bag stacking automation is improved, the production efficiency is improved, the labor cost is reduced, and the paper bag stacking device is suitable for paper bags of different sizes and orientations and suitable for the paper bag batch production scene.

Description

Technical Field

[0001] This invention relates to a paper bag production line, and more particularly to an automated paper bag palletizing system. Background Technology

[0002] In the mass production of paper bags, the stacking and collection of paper bags at the end of the production line is a key node to ensure production continuity and control labor costs. Currently, the traditional operating mode commonly used in the industry is as follows: after the paper bags output from the production line are stacked to a set quantity, manual labor is required to align the stacked paper bags and then transfer them to pallets for stacking. However, this manual operation mode has significant drawbacks: First, paper bag production is fast, and a single production line often requires multiple workers to work in shifts to keep up with the production pace, resulting in high labor costs. Moreover, long hours of repetitive manual labor can easily lead to fatigue, further reducing sorting and stacking efficiency. Second, paper bags produced by different production lines and processes have different output orientations, making it difficult to ensure uniformity when manually sorting and aligning them. This can easily lead to problems such as skewed or loose stacking, affecting subsequent transfer and storage. Third, pallet replacement and transfer rely entirely on manual coordination. When a pallet is full, the stacking operation must be paused while waiting for manual removal of full pallets and replenishment of empty pallets, causing production interruptions and restricting overall production efficiency. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides an automated paper bag palletizing system.

[0004] The technical solution adopted by this invention to solve its technical problem is: An automated paper bag palletizing system includes a first conveyor belt, a flipping mechanism, an alignment mechanism, a clamping mechanism for holding and transferring paper bags, and a second conveyor belt for transporting pallets, arranged sequentially. A first sensor and a second sensor are respectively installed at the front and rear ends of the first conveyor belt. The flipping mechanism is symmetrically equipped with turntables driven by a first motor. First transmission roller assemblies that can slide close to each other are symmetrically installed between the turntables. A push plate that can move left and right is installed on the front side of the alignment mechanism. A liftable baffle is installed on the rear side of the alignment mechanism. A third sensor is installed on the second conveyor belt.

[0005] A synchronous pulley is mounted on the rotating shaft of the first motor, and the side wall of the turntable is provided with toothed patterns along the circumferential direction corresponding to the synchronous pulley. The turntable and the synchronous pulley are connected by a synchronous belt drive.

[0006] The diameter of the synchronous pulley is smaller than the diameter of the turntable.

[0007] The turntable is equipped with a slide rail, and the first transmission roller assembly is slidably mounted on the slide rail.

[0008] The alignment mechanism further includes a second transmission roller assembly, and the top of the push plate is provided with a plurality of first vertical columns, which extend out from the gap of the second transmission roller assembly.

[0009] The alignment mechanism is equipped with a second motor for driving the push plate to reciprocate and a third motor for driving the baffle to rise and fall.

[0010] When the baffle descends to its lowest point, the top surface of the baffle is lower than the surface of the alignment mechanism's transmission belt.

[0011] The alignment mechanism is located in front of the push plate and is equipped with a fourth sensor.

[0012] It also includes a lifting mechanism, which includes several transmission belts. A lifting plate driven by a fourth motor is installed below the transmission belts. Several second vertical columns are arranged on the lifting plate at the gaps between the transmission belts.

[0013] The clamping mechanism is an industrial robotic arm.

[0014] The beneficial effects of this invention are as follows: This invention includes a first conveyor belt, a flipping mechanism, an alignment mechanism, a clamping mechanism, and a second conveyor belt arranged in sequence. A first sensor and a second sensor are respectively installed at the front and rear ends of the first conveyor belt. The flipping mechanism is symmetrically equipped with turntables driven by a first motor. First transmission roller assemblies that can slide close to each other are symmetrically installed between the turntables. Push plates and baffles that can move left and right are respectively installed on the front and rear sides of the alignment mechanism. A third sensor is installed on the second conveyor belt. After the second conveyor belt drives the pallet to the stacking position, the paper bags pass through the flipping mechanism and the alignment mechanism, and then the clamping mechanism stacks the paper bags on the pallet. When all the pallets on one pallet have been stacked, the second conveyor belt drives the second pallet to the stacking position. This improves the automation of paper bag stacking, increases production efficiency, reduces labor costs, adapts to paper bags of different sizes and orientations, and is suitable for mass production scenarios of paper bags. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the flipping mechanism; Figure 3 This is a schematic diagram of the lifting mechanism. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0018] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0019] The following describes some embodiments of the present invention with reference to the accompanying drawings.

[0020] Reference Figure 1-3 An automated paper bag palletizing system includes a first conveyor belt 1, a flipping mechanism 2, an alignment mechanism 3, a clamping mechanism 4 for clamping and transferring paper bags, and a second conveyor belt 12 for transporting pallets, arranged in sequence. The clamping mechanism 4 is an industrial robot. A first sensor 5 and a second sensor 6 are respectively installed at the front and rear ends of the first conveyor belt 1. The flipping mechanism 2 is symmetrically equipped with turntables 11 driven by a first motor 10. First transmission roller assemblies 7 that can slide close to each other are symmetrically installed between the turntables 11. A push plate that can move left and right is installed on the front side of the alignment mechanism 3. A baffle 9 that can be raised and lowered is installed on the rear side of the alignment mechanism 3. A third sensor 13 is installed on the second conveyor belt 12.

[0021] After the second conveyor belt 12 drives the pallet to the stacking position (e.g. Figure 1 As shown in Figure A), after the paper bags pass through the flipping mechanism 2 and the alignment mechanism 3, the clamping mechanism 4 stacks the paper bags onto a pallet. When one pallet has been fully stacked, the second conveyor belt 12 transports the second pallet to the stacking position, while the first pallet is transported forward (as shown in Figure A). Figure 1 As shown in B), this system enables a cycle, improves the automation of paper bag palletizing, and eliminates the need for manual intervention in sorting, alignment, and pallet replacement. It only requires periodic transfer of pallets filled with paper bags, thereby improving production efficiency, reducing labor costs, and adapting to paper bags of different sizes and orientations, making it suitable for mass production scenarios of paper bags.

[0022] Furthermore, the paper bags produced by the paper bag production line are stacked in a certain number to form a paper bag pile, and then enter the first conveyor belt 1. After the first sensor 5 detects the paper bag pile, it controls the first conveyor belt 1 to drive. When the paper bag pile completely passes through the first sensor 5, the first conveyor belt 1 will still drive for a certain distance (such as 100-300mm) and then stop. At this time, there will be a paper bag pile on the first conveyor belt 1. When the first sensor 5 detects the next paper bag pile, it will restart the first conveyor belt 1 again. This cycle continues until the second sensor 6 detects the paper bag pile, and then the first conveyor belt 1 is started to send the paper bags into the flipping mechanism 2.

[0023] Furthermore, by adjusting the equipment, the first sensor 5 and the second sensor 6 can detect the paper bag pile simultaneously. That is, at the same time that the paper bag pile produced by the paper bag production line is detected by the first sensor 5, the last paper bag pile on the first conveyor belt 1 is detected by the second sensor 6. At this time, the first conveyor belt 1 is started, the paper bag pile produced by the paper bag production line enters the first conveyor belt 1, and at the same time, the last paper bag pile on the first conveyor belt 1 enters the flipping mechanism 2.

[0024] By intermittently starting and stopping the first conveyor belt 1, the total running time of the first conveyor belt 1 can be reduced, thereby reducing the wear and tear on the first conveyor belt 1 and increasing its service life.

[0025] A synchronous pulley 14 is mounted on the rotating shaft of the first motor 10. The side wall of the turntable 11 is provided with toothed patterns in the circumferential direction corresponding to the synchronous pulley 14. The turntable 11 and the synchronous pulley 14 are connected by a synchronous belt 27. The diameter of the synchronous pulley 14 is smaller than the diameter of the turntable 11.

[0026] Furthermore, there are two turntables 11, and two sets of transmission components such as synchronous pulleys 14 are also required. The two synchronous pulleys 14 are connected by a connecting shaft 22.

[0027] Furthermore, the first transmission roller assembly 7 includes a mounting bracket 25, on which a transmission roller group driven by a fifth motor (which can be driven by a belt drive or other means) is mounted.

[0028] Furthermore, a screw 24 driven by a sixth motor 23 is installed on the turntable 11, and a threaded hole is provided on the mounting bracket 25 corresponding to the screw 24. The screw 24 is threadedly connected to the threaded hole. The thread structure of the threaded hole on the two first transmission roller assemblies 7 is opposite, that is, when the screw 24 rotates, the two first transmission roller assemblies 7 will synchronously move closer to each other or move further away from each other.

[0029] The turntable 11 is equipped with a slide rail 15, and the first transmission roller assembly 7 is slidably mounted on the slide rail 15 to improve the sliding stability of the first transmission roller assembly 7.

[0030] The alignment mechanism 3 further includes a second transmission roller assembly 16. The top of the push plate is provided with a plurality of first vertical columns 8, which extend out from the gap of the second transmission roller assembly 16. The alignment mechanism 3 is equipped with a second motor for driving the push plate to reciprocate and a third motor for driving the baffle 9 to rise and fall. When the baffle 9 descends to the lowest point, the top surface of the baffle 9 is lower than the surface of the transmission belt of the alignment mechanism 3. The alignment mechanism 3 is equipped with a fourth sensor 21 in front of the push plate.

[0031] After the paper bag stack has completely passed through the fourth sensor 21, the second motor drives the pusher plate to slide, pushing the paper bag stack to one side of the second transmission roller assembly 16 through the first vertical column 8, thereby achieving left-right alignment. The third motor drives the baffle 9 to rise, and after the paper bag stack touches the baffle 9, it achieves front-back alignment. Subsequently, the third motor drives the baffle 9 to descend, and the second transmission roller assembly 16 will continue to transport the aligned paper bag stack backward.

[0032] The second drive roller assembly 16 is a metal roller. When the paper bag stack is pushed by the push plate, the friction between the paper bag stack and the second drive roller assembly 16 is small and will not damage the paper bags.

[0033] Furthermore, the start time of the second motor can be set via the control panel, generally based on the size of the paper bag, to ensure that the paper bag is fully inside the push plate before being pushed by the push plate.

[0034] The system also includes a lifting mechanism 17, which includes several transmission belts 18. A lifting plate 19 driven by a fourth motor 28 is installed below the transmission belts 18 on the lifting mechanism 17. Several second vertical columns 20 are arranged on the lifting plate 19 at the gap between the transmission belts 18.

[0035] Furthermore, a fifth sensor 26 is installed on the lifting mechanism 17. When the fifth sensor 26 detects a stack of paper bags, the transmission belt 18 stops, and the fourth motor 28 drives the lifting plate 19 to rise. The stack of paper bags is then lifted by the second vertical column 20, making it easier for the robotic arm to grip it.

[0036] In this application, all sensors can be through-beam sensors.

[0037] In this application, all transmission mechanisms can be selected from conventional transmission structures such as gear transmission, rack and pinion transmission, chain transmission, and belt transmission, according to actual needs.

[0038] In this application, if the paper bag itself does not need to be flipped, the flipping mechanism 2 can be set to not flip. By driving the sixth motor 23, the position of the first transmission roller assembly 7 is adjusted so that it can be used as a paper bag conveying mechanism.

[0039] In this invention, the term "a plurality of" refers to two or more unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection via an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An automated paper bag palletizing system, characterized in that... The system includes a first conveyor belt (1), a flipping mechanism (2), an alignment mechanism (3), a clamping mechanism (4) for clamping and transferring paper bags, and a second conveyor belt (12) for transporting pallets, arranged in sequence. A first sensor (5) and a second sensor (6) are installed at the front and rear ends of the first conveyor belt (1), respectively. A turntable (11) driven by a first motor (10) is symmetrically installed on the flipping mechanism (2). A first transmission roller assembly (7) that can slide close to each other is symmetrically installed between the turntables (11). A push plate that can move left and right is installed on the front side of the alignment mechanism (3). A baffle (9) that can be raised and lowered is installed on the rear side of the alignment mechanism (3). A third sensor (13) is installed on the second conveyor belt (12).

2. The automated paper bag palletizing system according to claim 1, characterized in that... A synchronous pulley (14) is mounted on the rotating shaft of the first motor (10). The side wall of the turntable (11) is provided with toothed patterns in the circumferential direction corresponding to the synchronous pulley (14). The turntable (11) and the synchronous pulley (14) are connected by a synchronous belt (27).

3. The automated paper bag palletizing system according to claim 2, characterized in that... The diameter of the synchronous pulley (14) is smaller than the diameter of the turntable (11).

4. The automated paper bag palletizing system according to claim 1, characterized in that... The turntable (11) is equipped with a slide rail (15), and the first transmission roller assembly (7) is slidably mounted on the slide rail (15).

5. The automated paper bag palletizing system according to claim 1, characterized in that... The alignment mechanism (3) further includes a second transmission roller assembly (16), and the top of the push plate is provided with a plurality of first vertical columns (8), which extend out from the gap of the second transmission roller assembly (16).

6. The automated paper bag palletizing system according to claim 1, characterized in that... The alignment mechanism (3) is equipped with a second motor for driving the push plate to move back and forth and a third motor for driving the baffle (9) to rise and fall.

7. The automated paper bag palletizing system according to claim 1, characterized in that... When the baffle (9) descends to its lowest point, the top surface of the baffle (9) is lower than the surface of the transmission belt of the alignment mechanism (3).

8. The automated paper bag palletizing system according to claim 1, characterized in that... The alignment mechanism (3) is equipped with a fourth sensor (21) located in front of the push plate.

9. The automated paper bag palletizing system according to claim 1, characterized in that, It also includes a lifting mechanism (17), which includes several transmission belts (18). The lifting mechanism (17) is located below the transmission belts (18) and a lifting plate (19) driven by a fourth motor (28) is installed on the lifting mechanism (17). Several second vertical columns (20) are arranged on the lifting plate (19) at the gap between the transmission belts (18).

10. The automated paper bag palletizing system according to claim 1, characterized in that... The clamping mechanism (4) is an industrial robot.

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