Ton bag stacking mechanism and method

Abstract

The invention discloses a ton bag folding mechanism and a ton bag folding method. The ton bag folding mechanism comprises a frame body; the conveying device comprises a conveying platform; the bag hanging device is arranged on the frame body and located above the conveying device, the bag hanging device can ascend or descend relative to the conveying device, and the bag hanging device comprises a hook assembly; wherein a weighing sensor is arranged on the conveying device and used for weighing the weight of materials located on the conveying platform, or the weighing sensor is arranged on the conveying device; a weighing sensor is arranged on the bag hanging device and used for weighing the weight of materials located on the hook assembly or used for weighing the weight of the materials located on the hook assembly. A weighing sensor is arranged on the frame body and used for weighing the weight of materials located on the bag hanging device. According to the ton bag folding mechanism and method, the bag folding process can be automatically controlled according to weight changes, the ton bag folding mechanism and method automatically adapt to ton bags of different sizes and heights, and stability and reliability are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of packaging, transportation and warehousing, and in particular relates to a ton bag stacking mechanism and a stacking method, which can be applied to ton bag stacking and palletizing products. Background Art

[0002] In the prior art, the stacking of ton bags is usually done manually. For example, a worker would use a forklift or lifting equipment to lift one ton bag to a certain height and place it directly on top of another ton bag to complete the stacking of the two ton bags.

[0003] However, manual observation is required to control the lifting height of the lifting equipment and move the lifting equipment so that the ton bags can fall on top of each other. This will result in the stacking of bags being uneven and unsightly, and prone to skewness or even the risk of falling, posing certain safety hazards. At the same time, manual stacking also has the problems of low efficiency and waste of resources.

[0004] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a ton bag stacking mechanism and stacking method, which can automatically control the stacking process according to weight changes, automatically adapt to ton bags of different sizes and heights, and is stable and reliable, solving the efficiency problems in the prior art.

[0006] In order to achieve the above-mentioned object, a specific embodiment of the present invention provides a ton bag stacking mechanism, comprising:

[0007] frame;

[0008] The conveying device includes a conveying platform; and

[0009] a bag hanging device, disposed on the frame and located above the conveying device, the bag hanging device being capable of rising or falling relative to the conveying device, the bag hanging device comprising a hook assembly;

[0010] Wherein, the conveying device is provided with a weighing sensor for weighing the weight of the material on the conveying platform, or;

[0011] The bag hanging device is provided with a weighing sensor for weighing the weight of the material on the hook assembly, or;

[0012] A weighing sensor is provided on the frame for weighing the weight of the material on the bag hanging device.

[0013] In one or more embodiments of the present invention, the bag hanging device further comprises a bracket, which is connected to the frame and can rise or fall relative to the conveying device, and the hook assembly is suspended on the bracket via the weighing sensor.

[0014] In one or more embodiments of the present invention, the number of the hook assemblies is multiple groups, and the hook assemblies are arranged in a one-to-one correspondence with the hanging hooks on the ton bag.

[0015] In one or more embodiments of the present invention, the number of the weighing sensors is multiple groups, and the weighing sensors are arranged in a one-to-one correspondence with the hook components.

[0016] In one or more embodiments of the present invention, the hook assembly includes a mounting plate, a hook body and a driving structure. The hook body can be rotatably disposed on the mounting plate. The driving structure is disposed on the mounting plate and acts on the hook body to drive the hook body to rotate to release the ton bag hung on the hook body.

[0017] In one or more embodiments of the present invention, the hook body includes a fixing portion and a hook portion extending from the fixing portion and bent, and the fixing portion is movably connected to the driving structure.

[0018] In one or more embodiments of the present invention, the hook assembly also includes a release auxiliary component, which is arranged on the mounting plate. The release auxiliary component is arranged to be a U-shaped structure and is sleeved on the hook body. The hook portion of the hook body can be passed through the release auxiliary component.

[0019] In one or more embodiments of the present invention, the hook assembly also includes an anti-slip limiter, which can be rotatably disposed on the mounting plate, one end of which overlaps with the free end of the hook portion of the hook body and can rotate from the hook portion of the hook body toward the fixed portion.

[0020] In one or more embodiments of the present invention, the conveying device includes a support frame, and the conveying platform is supported on the support frame through the weighing sensor; or,

[0021] The weighing sensor is arranged between the conveying device and the ground.

[0022] In one or more embodiments of the present invention, the frame has a transversely arranged support body and a main body bracket longitudinally arranged on the support body, and the bag hanging device is arranged on the main body bracket and can move longitudinally along the main body bracket.

[0023] In one or more embodiments of the present invention, the weighing sensor is arranged between the support body and the main frame; or,

[0024] The weighing sensor is arranged between the support body and the ground.

[0025] In one or more embodiments of the present invention, a guide rail is provided on the main body bracket, and the bag hanging device is slidably set on the guide rail through guide rollers. A lifting device is provided on the main body bracket, and the lifting device acts on the bag hanging device to make it rise or fall relative to the conveying device.

[0026] A specific embodiment of the present invention further provides a stacking method for the aforementioned ton bag stacking mechanism, wherein a weighing sensor is provided on a conveying device, and the stacking method comprises:

[0027] Obtain weight information M1 of the first ton of bags weighed by the weighing sensor;

[0028] Obtain the weight information M2 of the second ton bag measured by the weighing sensor, and calculate the total weight information Mt of the two ton bags;

[0029] Obtain the weight information Mp measured by the weighing sensor when the first ton bag is stacked on the second ton bag;

[0030] When the difference between the weight information Mp measured by the weighing sensor and the total weight information Mt is within a preset range, the weight information Mp measured by the weighing sensor is obtained multiple times at intervals of a certain time period;

[0031] Whether the stacking is completed is determined based on the change in the weight information Mp measured by the weighing sensor.

[0032] In one or more embodiments of the present invention, obtaining weight information M1 of a first ton bag measured by a weighing sensor includes:

[0033] Obtain weight information M0 of an empty conveying platform or conveying device;

[0034] The first ton bag is conveyed to the bottom of the bag hanging device via the conveying platform, and first weight information M3 of the conveying platform or conveying device carrying the first ton bag is obtained;

[0035] The weight information M1 of the first ton bag is obtained by calculating the difference between the first weight information M3 and the weight information M0 of the conveying platform or the conveying device.

[0036] In one or more embodiments of the present invention, obtaining weight information M2 of the second ton bag measured by the weighing sensor includes:

[0037] Obtain weight information M0 of an empty conveying platform or conveying device;

[0038] Lift the first ton of bags to a certain height through the bag hanging device;

[0039] Convey the second ton bag to the bottom of the first ton bag via the conveying platform, and obtain second weight information M4 of the conveying platform or conveying device carrying the second ton bag;

[0040] The difference between the second weight information M4 and the weight information M0 of the conveying platform or the conveying device is calculated to obtain the weight information M2 of the second ton bag.

[0041] In one or more embodiments of the present invention, judging whether the stacking is completed based on the change of the weight information Mp measured by the weighing sensor includes:

[0042] If the weight information Mp obtained by the weighing sensor does not change, the bag hanging device is controlled to stop moving and the bag hanging device is controlled to release the ton bag;

[0043] Control the lifting of the bag hanging device and obtain the weight information Mm measured by the weighing sensor;

[0044] If the weight information Mm measured by the weighing sensor does not change, it is determined that the stacking is completed;

[0045] Otherwise, it is determined that the stacking is incomplete.

[0046] A specific embodiment of the present invention further provides a stacking method for the aforementioned ton bag stacking mechanism, wherein a weighing sensor is provided on a conveying device, and the stacking method comprises:

[0047] Obtain weight information M0 of an empty conveying platform or conveying device;

[0048] Obtain weight information M1 of the first ton of bags weighed by the weighing sensor;

[0049] Obtaining second weight information M4 of the conveying platform or conveying device carrying the second ton bag, and calculating the total weight information of the second weight information M4 and the first ton bag;

[0050] Obtain the weight information Mp measured by the weighing sensor when the first ton bag is stacked on the second ton bag;

[0051] When the difference between the weight information Mp measured by the weighing sensor and the total weight information is within a preset range, the weight information Mp measured by the weighing sensor is obtained multiple times at intervals of a certain time period;

[0052] Whether the stacking is completed is determined based on the change in the weight information Mp measured by the weighing sensor.

[0053] A specific embodiment of the present invention further provides a stacking method for the aforementioned ton bag stacking mechanism, wherein a weighing sensor is provided on the bag hanging device, or a weighing sensor is provided on the frame, and the stacking method comprises:

[0054] Obtain weight information M1 of the first ton of bags weighed by the weighing sensor;

[0055] Obtaining the weight information Mx measured by the weighing sensor when the first ton bag is stacked on the second ton bag;

[0056] When the difference between the weight information Mx measured by the weighing sensor and the weight information M1 of the first ton bag is within a preset range, the weight information Mx measured by the weighing sensor is obtained multiple times at intervals of a certain time period;

[0057] Whether the stacking is completed is determined based on the change in the weight information Mx obtained from the weighing sensor.

[0058] In one or more embodiments of the present invention, determining whether the stacking is completed based on the change in the weight information Mx obtained from the weighing sensor includes:

[0059] If the weight information Mx obtained by the weighing sensor does not change, the bag hanging device is controlled to stop moving and the bag hanging device is controlled to release the ton bag;

[0060] Control the lifting of the bag hanging device and obtain the weight information Mz measured by the weighing sensor;

[0061] If the weight information Mz measured by the weighing sensor does not change, it is determined that the stacking is completed;

[0062] Otherwise, it is determined that the stacking is incomplete.

[0063] Compared with the existing technology, the ton bag stacking mechanism and stacking method of the present invention can automatically control the stacking process according to weight changes, automatically adapt to ton bags of different sizes and heights, are stable and reliable, realize automatic stacking, and solve the efficiency problems in the existing technology.

[0064] The ton bag stacking mechanism and stacking method of the present invention realize automatic unhooking of the ton bag by setting a hook component; it can automatically judge whether the unhooking is successful according to the weight change, and perform relevant operations according to the specific situation to ensure successful unhooking.

[0065] The ton bag stacking mechanism and stacking method of the present invention enable the conveying device or the bag hanging device or the entire frame to have a weight detection function through the provision of a weighing sensor, automatically controls the stacking process according to weight changes, improves stacking efficiency, saves human resources, and enhances the aesthetics of stacking. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments described in the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0067] Figure 1 This is a front view of the ton bag stacking mechanism in the first embodiment of the present invention;

[0068] Figure 2 It is a side view of the ton bag stacking mechanism in the first embodiment of the present invention;

[0069] Figure 3 This is a detailed diagram of the frame structure of the ton bag stacking mechanism in the first embodiment of the present invention;

[0070] Figure 4 This is a detailed structural diagram of the bag hanging device in the ton bag stacking mechanism in the first embodiment of the present invention;

[0071] Figure 5 This is a detailed structural diagram of the conveying device in the ton bag stacking mechanism in the first embodiment of the present invention;

[0072] Figure 6 This is a control principle diagram of the stacking method of the ton bag stacking mechanism in the first embodiment of the present invention;

[0073] Figure 7 This is an action diagram of the stacking process of the ton bag stacking mechanism in the first embodiment of the present invention;

[0074] Figure 8 This is a control principle diagram of the stacking method of the ton bag stacking mechanism in the second embodiment of the present invention. DETAILED DESCRIPTION

[0075] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments 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 should fall within the scope of protection of the present invention.

[0076] As mentioned in the background, ton bags are typically stacked manually. However, manual monitoring to control the lifting height of the lifting equipment and maneuvering the lifting equipment so that the ton bags land on top of each other results in uneven and unsightly stacks, and the bags are prone to tilting or even falling, posing a safety hazard. Furthermore, manual stacking is inefficient and wastes resources.

[0077] In order to solve the above technical problems, the present application provides a ton bag stacking mechanism and stacking method, which can automatically control the stacking process according to weight changes, automatically adapt to ton bags of different sizes and heights, and is stable and reliable, solving the efficiency problems in the existing technology.

[0078] like Figure 1 and Figure 2 As shown, a ton bag stacking mechanism according to one embodiment of the present invention includes a frame 10, a conveyor 20, a bag hanging device 30, and a weighing sensor 40. The conveyor 20 is positioned adjacent to the frame 10 and includes a conveying platform 21. The bag hanging device 30 is mounted on the frame 10 and positioned above the conveyor 20. The bag hanging device 30 can rise or fall relative to the conveyor 20 and includes a hook assembly 31. The weighing sensor 40 is mounted on the conveyor 20, the bag hanging device 30, or the frame 10.

[0079] In the first preferred embodiment, the weighing sensor 40 is disposed on the conveying device 20 to measure the weight of the material on the conveying platform 21 .

[0080] refer to Figure 2 As shown, the frame 10 has a horizontally arranged support body 11 and a main frame 12 arranged longitudinally on the support body 11. The main frame 12 is arranged at one end of the support body 11 and is perpendicular to the support body 11. The bag hanging device 30 is arranged on the main frame 12 and can move longitudinally along the main frame 12.

[0081] For example, a lifting device may be provided on the main frame 12 , and the lifting device may act on the bag hanging device 30 to make it rise or fall relative to the conveying device 20 .

[0082] Exemplary, reference Figure 3As shown, the lifting device may include a guide rail 121 provided on the main frame 12, and the guide rail 121 is used to assist the movement of the bag hanging device 30 installed on the main frame 12. The lifting device also includes a driving shaft 122 and a driven shaft 123 respectively provided at both ends of the guide rail 121 of the main frame 12. A sprocket 124 is provided on each of the driving shaft 122 and the driven shaft 123, and a chain 125 is provided on the two sprockets 124. The lifting device also includes a first driving mechanism (such as a motor) connected to the driving shaft 122. The rotation of the chain 125 and the sprocket 124 drives the movement of the bag hanging device 30 connected to the chain 125. The bag hanging device 30 can be slidably provided on the guide rail 121 via guide rollers.

[0083] refer to Figure 2 and Figure 4 As shown, the bag hanging device 30 is slidably arranged on the guide rail 121 of the main frame 12 via guide rollers and is fixedly connected to the chain 125. The bag hanging device 30 includes a bracket 32, which is connected to the guide rail 121 on the frame 10 and the chain 125. The hook assembly 31 is arranged on the bracket 32.

[0084] The number of the hook components 31 can be multiple groups, preferably four groups but not limited to four groups, and the hook components 31 are arranged in a one-to-one correspondence with the hanging tabs A1 on the ton bag A.

[0085] refer to Figure 4 As shown, the hook assembly 31 includes a mounting plate 311, a hook body 312, and a drive mechanism 313. The hook body 312 is rotatably mounted on the mounting plate 311, for example, via a pin. The drive mechanism 313 is mounted on the mounting plate 311 and acts on the hook body 312, driving the hook body 312 to rotate, releasing the ton bag hung on the hook body 312 and completely disengaging the ton bag from the hook body 312.

[0086] The hook body 312 comprises a fixed portion 3121 and a hook portion 3122 extending and bent from the fixed portion 3121. The fixed portion 3121 is movably connected to the drive structure 313. In this embodiment, the hook portion 3122 is arranged in a specific C-shaped structure. The connection between the fixed portion 3121 and the hook portion 3122 is connected to the mounting plate 311 via a pin. The drive structure 313 is preferably a pneumatic cylinder. The cylinder expands and contracts, moving the fixed portion 3121, causing the hook portion 3122 to rotate back and forth around the pin, releasing the lifting tab A1 on the ton bag A.

[0087] The hook assembly 31 also includes a release assist member 314, which is mounted on the mounting plate 311. The release assist member 314 is a U-shaped structure that fits over the hook body 312. The hook portion 3122 of the hook body 312 can be inserted into the release assist member 314. When the sling of the ton bag is attached to the hook body 312, the sling is positioned between the free end of the hook portion 3122 and the release assist member 314. When the drive mechanism 313 rotates the hook body 312, the release assist member 314 remains stationary, while the hook portion 3122 of the hook body 312 moves away from the free end and disengages from the release assist member 314. The sling slides off the hook portion 3122 due to the weight of the ton bag and the resistance of the release assist member 314.

[0088] The hook assembly 31 also includes a stopper 315, which is rotatably mounted on the mounting plate 311. One end of the stopper 315 overlaps the free end of the hook portion 3122 of the hook body 312 and can rotate from the hook portion 3122 of the hook body 312 toward the fixed portion 3121. The overlap of the stopper 315 with the hook body 312 prevents the sling of the tote bag from accidentally falling off. The stopper 315 can rotate toward the inside of the hook body 312, making it easier for workers to attach the sling to the hook body 312. The stopper 315 has a certain weight, which ensures that when the hook body 312 rotates under the action of the drive structure 313, it remains in a naturally suspended state. It does not rotate with the rotation of the hook body 312, thereby blocking the free end of the hook portion 3122 and preventing the tote bag from falling off.

[0089] refer to Figure 5 As shown, the conveying device 30 includes a support frame 32, and a conveying platform 31 is supported on the support frame 32 via load cells 40. A load cell 40 is provided at each connection between the support frame 32 and the conveying platform 31. In this embodiment, the weight measured by the load cells 40 represents the weight of the conveying platform 31 and the objects carried on the conveying platform 31.

[0090] In other embodiments, the weighing sensor 40 may also be disposed between the support frame 32 and the ground. In this embodiment, the weight measured by the weighing sensor 40 is the total weight information of the conveying device 20 and the materials carried thereon.

[0091] The conveying platform 31 can be a conveying structure in the prior art that can transport large objects. Since it is not the focus of this application, this application will not elaborate on it in detail.

[0092] refer to Figure 6 As shown, for the embodiment in which the weighing sensor 40 is arranged on the conveying device 20, the present application further provides a stacking method, which specifically includes the following steps:

[0093] S1, obtaining weight information M1 of the first ton of bags weighed by the weighing sensor.

[0094] S2, obtaining the weight information M2 of the second ton bag weighed by the weighing sensor, and calculating the total weight information Mt of the two ton bags.

[0095] S3, obtaining weight information Mp measured by the weighing sensor during the process of stacking the first ton bag on the second ton bag.

[0096] S4, when the difference between the weight information Mp measured by the weighing sensor and the total weight information Mt is within a preset range, the weight information Mp measured by the weighing sensor is obtained multiple times at intervals of a certain time period.

[0097] S5, judging whether the stacking is completed based on the change of the weight information Mp obtained by the weighing sensor.

[0098] Wherein, in step S1, it specifically includes:

[0099] First, obtain the weight information M0 of the empty conveyor platform or conveyor device. Then, convey the first ton bag via conveyor platform 21 to the bottom of the bag hanging device 30. Then obtain the first weight information M3 of the conveyor platform 21 or conveyor device 20 carrying the first ton bag. Calculate the difference between the first weight information M3 and the weight information M0 of the conveyor platform or conveyor device 20 to obtain the weight information M1 of the first ton bag.

[0100] In step S2, it specifically includes:

[0101] First, obtain the weight information M0 of the empty conveying platform or conveying device. Then, lift the first ton bag to a certain height using the bag hanging device 30. Then, transport the second ton bag to the bottom of the first ton bag using the conveying platform 21. Obtain the second weight information M4 of the conveying platform 21 or conveying device 20 carrying the second ton bag. Calculate the difference between the second weight information M4 and the weight information M0 of the conveying platform 21 or conveying device 20 to obtain the weight information M2 of the second ton bag. Calculate the total weight Mt of the two ton bags.

[0102] In step S5, it specifically includes:

[0103] If the weight information Mp measured by the weighing sensor does not change, the bag hanging device is controlled to stop moving, and the bag hanging device is controlled to release the ton bag; the bag hanging device is controlled to lift, and the weight information Mm measured by the weighing sensor is obtained; if the weight information Mm measured by the weighing sensor does not change, it is judged that the stacking is completed; otherwise, it is judged that the stacking is not completed.

[0104] The following is based on Figure 7The action diagram of the stacking process of the ton bag stacking mechanism shown in the figure elaborates in detail the stacking control principle of the ton bag stacking mechanism of the present application.

[0105] refer to Figure 7 As shown in a in the figure, at the initial position, the conveying device 20 of the ton bag stacking mechanism is empty, that is, there is no ton bag A. The weighing sensor 40 carrying the conveying device 20 or only carrying the conveying platform 21 is sampled to obtain an analog signal, which is converted into a digital signal and the weight value in the empty state is recorded, which is the weight information M0 of the conveying platform 21 or the conveying device 20.

[0106] It can be understood that if the weighing sensor 40 is set below the conveying platform 21, it only measures the weight information of the conveying platform 21 as M0; if the weighing sensor 40 is set below the entire conveying device 20, it measures the weight information of the entire conveying device 20 as M0.

[0107] refer to Figure 7 As shown in b, the first ton bag is transported to the stacking position directly below the stacking mechanism (opposite the bag hanging device 30) through the conveying platform 21, and the weighing sensor 40 carrying the conveying platform 21 or the conveying device 20 is sampled to obtain an analog signal, which is converted into a digital signal, and the weight value of the first ton bag is recorded, which is the first weight information M3 of the conveying platform 21 or the conveying device 20 carrying the first ton bag; the weight information M1 of the first ton bag is obtained by calculating the difference between the first weight information M3 and the weight information M0 of the conveying platform 21 or the conveying device 20.

[0108] refer to Figure 7 As shown in Figures c to f, the bag hanging device 30 descends to the low position (the bag hanging position - the height of a single ton bag), and the four hanging hooks of the first ton bag are hung on the hook assembly 31 of the bag hanging device 30. The bag stacking mechanism is activated, the first drive mechanism rotates forward, driving the driving shaft to rotate, the chain rises, and the bag hanging device 30 moves upward along the guide rail 121 of the main frame 12 to a set height. This height allows a second ton bag to be placed under the first ton bag without affecting the first ton bag.

[0109] The second ton bag is delivered via the conveyor platform 21 to the stacking position directly below the stacking mechanism (opposite the bag hanging device 30). The load cell 40 carrying the conveyor platform 21 or conveyor device 20 samples an analog signal, converts the analog signal into a digital signal, and records the weight of the second ton bag. This is the second weight information M4 of the conveyor platform 21 or conveyor device 20 carrying the second ton bag. The difference between the second weight information M4 and the weight information M0 of the conveyor platform 21 or conveyor device 20 is calculated to obtain the weight information M2 of the second ton bag. Based on the weight information M1 of the first ton bag and the weight information M2 of the second ton bag, the total weight information Mt of the two ton bags is calculated.

[0110] refer to Figure 7 As shown in Figure g, after obtaining the weight value M2 of the second ton bag, the bag stacking mechanism automatically starts, the first drive mechanism reverses, driving the active shaft to rotate, the chain descends, and the bag hanging device 30 descends along the guide rail 121 of the main frame 12. During the slow descent, the weighing sensor 40 of the conveying device 20 or conveying platform 21 carrying the ton bag is continuously sampled to obtain an analog signal, which is converted into a digital signal to obtain a real-time sampled weight value. The real-time sampled weight value excludes the weight information M0 of the conveying platform 21 or conveying device 20.

[0111] When the following two conditions are met, the bag stacking mechanism is controlled to stop lowering the bag hanging device 30, completing the bag stacking. Condition 1: The sampled weight value is close to the total weight information Mt of the two ton bags. "Close" here can be understood as meaning that the difference between the sampled weight value and the total weight information Mt of the two ton bags is within a certain preset range. This preset range can be a range of values, such as, but not limited to, 0kg to 0.5kg.

[0112] It is understood that the real-time sampled weight value may also include the weight information M0 of the conveying platform 21 or the conveying device 20. Therefore, the difference between the sampled weight value and the total weight information Mt of the two ton bags can be greater than or equal to the weight information M0 of the conveying platform 21 or the conveying device 20. Therefore, the preset range can also be set to include the weight information M0 of the conveying platform 21 or the conveying device 20 and then add 0kg to 0.5kg, preferably 0kg. Condition 2 is: obtain a real-time sampled weight value at a certain interval, for example, sampling at 200ms and 500ms respectively, and determine the weight change between the two times.

[0113] refer to Figure 7As shown in g, if the weights of the two measurements no longer change, the hook assembly 31 of the bag hanging device 30, driven by the drive structure, automatically opens the hook body, causing the hanging hook of the first ton bag to automatically leave the hook body. At this time, the first drive mechanism rotates forward, driving the active shaft to rotate, the chain rises, and the bag hanging device 30 moves upward along the guide rail 121 of the main frame 12. At this time, the weighing sensor 40 of the carrying conveyor 20 or conveying platform 21 is sampled to obtain an analog signal, which is converted into a digital signal to obtain real-time weight information Mm. If the weight information Mm does not change, it is automatically determined that the bag is released successfully, and the bag hanging device 30 is controlled to continue to rise to the specified position. If the weight information Mm decreases, it is determined that the bag is released unsuccessfully, and the bag release action needs to be executed again.

[0114] After the bag is loosened, the conveying device 20 is started to deliver the ton bag that has been stacked, and the entire stacking action is completed.

[0115] In the above embodiment, after the load cell 40 measures the second weight M3 of the conveying platform 21 or conveying device 20 carrying the first ton bag and the second weight M4 of the conveying platform 21 or conveying device 20 carrying the second ton bag, a conversion step is performed. Specifically, the weight information of the conveying platform 21 or conveying device 20 is divided by the obtained weight information to obtain the weight information of the corresponding ton bag. The converted ton bag weight information is then used in the subsequent numerical comparison to make the next determination.

[0116] In other embodiments, the weight information of the conveying platforms 21 or conveying devices 20 carrying different ton bags can also be directly used for subsequent numerical comparison. For example, the weight information M0 of the empty conveying platform 21 or conveying device 20 is first obtained; the first weight information M3 of the conveying platform 21 or conveying device 20 carrying the first ton bag is then obtained, and the weight information M1 of the first ton bag is calculated. The second weight information M4 of the conveying platform 21 or conveying device 20 carrying the second ton bag is then obtained. After this step, the weight information of the second ton bag is no longer calculated separately. Instead, the sum of the second weight information M4 and the weight information M1 of the first ton bag is directly calculated. This sum is then compared with the sampled weight information obtained in real time by the subsequent weighing sensor to determine whether the automatic stacking is successful.

[0117] In the second preferred embodiment, the weighing sensor 40 is disposed on the bag hanging device 30 to measure the weight of the material on the hook assembly 31 .

[0118] In the second embodiment, the conveyor 20 is no longer equipped with a load cell 40. Instead, the load cell 40 is provided only between the hook assembly 31 and the bracket 32. The hook assembly 31 is suspended from the bracket 32 ​​via the load cell 40. In this embodiment, the weight measured by the load cell 40 is the weight of the object hung on the hook assembly 31.

[0119] In this embodiment, there are multiple groups of hook assemblies 31 and multiple groups of weighing sensors 40. The weighing sensors 40 are arranged in a one-to-one correspondence with the hook assemblies 31, and the hook assemblies 31 are arranged in a one-to-one correspondence with the lifting tabs on the ton bag.

[0120] refer to Figure 8 As shown, for the embodiment in which the weighing sensor 40 is arranged on the bag hanging device 30, the present application further provides a bag stacking method, which specifically includes the following steps:

[0121] S10, obtaining weight information M1 of the first ton of bags weighed by the weighing sensor;

[0122] S20, obtaining weight information Mx measured by the weighing sensor during the process of stacking the first ton bag on the second ton bag;

[0123] S30, when the difference between the weight information Mx measured by the weighing sensor and the weight information M1 of the first ton bag is within a preset range, obtaining the weight information Mx measured by the weighing sensor multiple times at regular intervals;

[0124] S40, judging whether the stacking is completed based on the change of the weight information Mx obtained by the weighing sensor.

[0125] Wherein, in step S40, specifically including:

[0126] If the weight information Mx measured by the weighing sensor does not change, the bag hanging device is controlled to stop moving and the bag hanging device is controlled to release the ton bag; the bag hanging device is controlled to lift and the weight information Mz measured by the weighing sensor is obtained; if the weight information Mz measured by the weighing sensor does not change, it is judged that the stacking is completed; otherwise, it is judged that the stacking is not completed.

[0127] Specifically, refer to the following examples:

[0128] The bag hanging device 30 descends to its lowest position (the bag hanging position—the height of a single ton bag), and the four hanging hooks of the first ton bag are hung on the hook assembly 31 of the bag hanging device 30. The bag stacking mechanism is activated, and the first drive mechanism rotates forward, driving the drive shaft, which raises the chain, pulling the bag hanging device 30 upward along the guide rail 121 of the main frame 12 to a set height. This height allows the second ton bag to be placed below the first ton bag without affecting the first ton bag. At this point, the load cell 40 carrying the first ton bag samples an analog signal, which is converted into a digital signal and recorded as the weight M1 of the first ton bag. It should be understood that when the first ton bag is not hung, the weight information measured by the load cell (the weight information of the hook assembly) should preferably be reset to zero to facilitate subsequent calculations. However, this does not have to be reset. If it is not reset, the subsequent weight information will be the sum of the weight information of the first ton bag and the weight information of the hook assembly.

[0129] The second ton bag is delivered to the bag stacking position directly below the bag stacking mechanism (directly opposite the bag hanging device 30) through the conveying platform 21.

[0130] The bag stacking mechanism automatically activates, the first drive mechanism reverses, driving the active shaft to rotate, the chain descending, and the bag hanging device 30 descending along the guide rail 121 of the main frame 12. During this slow descent, the load cell 40 on the hanging belt device 30 carrying the ton bag continuously samples an analog signal, which is converted into a digital signal to obtain a real-time sampled weight value Mx. Similarly, this sampled weight value Mx can be the weight information after removing the weight information of the hook assembly, or it can be the sum of the weight information of the first ton bag and the weight information of the hook assembly.

[0131] When the following two conditions are met, the bag stacking mechanism is controlled to stop the lowering of the bag hanging device 30, completing the bag stacking. Condition 1: When the sampled weight value Mx is the weight information after removing the weight information of the hook assembly, the difference between it and the weight information M1 of the first ton bag should be close to the weight information M1 of the first ton bag. In other words, the sampled weight value Mx is close to 0. When the sampled weight value Mx is the sum of the weight information of the first ton bag and the weight information of the hook assembly, the difference between it and the weight information M1 of the first ton bag should be close to the weight information M1 of the first ton bag. In other words, the sampled weight value Mx is close to the weight information of the hook assembly 31. "Close" can be understood as meaning that the difference between the sampled weight value Mx and 0 or the weight information of the hook assembly 31 is within a certain preset range. This preset range can be an interval value, such as, but not limited to, 0kg to 0.5kg. Condition 2: Real-time sampled weight values ​​are acquired at regular intervals, such as at 200ms and 500ms, and the weight change between the two times is determined.

[0132] If the weights of the two measurements no longer change, the hook assembly 31 of the bag hanging device 30, driven by the drive structure, automatically opens the hook body, allowing the hanging hook of the first ton bag to automatically leave the hook body. At this time, the first drive mechanism rotates forward, driving the active shaft to rotate, the chain rises, and pulls the bag hanging device 30 upward along the guide rail 121 of the main frame 12. At this time, the weighing sensor 40 on the bag hanging device 30 samples an analog signal, which is converted into a digital signal to obtain real-time weight information Mz. If the weight information Mz does not change, the bag is automatically judged to be released successfully, and the bag hanging device 30 is controlled to continue to rise to the specified position. If the weight information Mz increases, the bag release is judged to have failed and the bag release action needs to be executed again.

[0133] After the bag is loosened, the conveying device 20 is started to deliver the ton bag that has been stacked, and the entire stacking action is completed.

[0134] In the third preferred embodiment, a weighing sensor 40 is disposed on the frame 10 for weighing the material on the bag hanging device 30 .

[0135] In this embodiment, a load cell 40 is disposed between the support 11 and the main frame 12, and the main frame 12 is supported on the support 11 via the load cell 40. A load cell 40 is provided at each connection between the support 11 and the main frame 12. In this embodiment, the weight measured by the load cell 40 represents the weight of all objects carried on the support 11.

[0136] In other embodiments, the weighing sensor 40 may also be disposed between the support 11 and the ground. In this embodiment, the weight measured by the weighing sensor 40 is the weight information of the entire ton bag stacking mechanism excluding the conveying device 20.

[0137] Similarly, for the embodiment in which the weighing sensor 40 is disposed on the frame 10, the present application also provides a stacking method, which specifically includes the following steps:

[0138] S100, obtaining weight information M1 of the first ton of bags weighed by the weighing sensor;

[0139] S200, obtaining weight information Mx measured by a weighing sensor during a process in which a first ton bag is stacked on a second ton bag;

[0140] S300, when the difference between the weight information Mx measured by the weighing sensor and the weight information M1 of the first ton bag is within a preset range, obtaining the weight information Mx measured by the weighing sensor multiple times at regular intervals;

[0141] S400 , judging whether the stacking is completed based on the change of the weight information Mx obtained from the weighing sensor.

[0142] Wherein, in step S400, it specifically includes:

[0143] If the weight information Mx measured by the weighing sensor does not change, the bag hanging device is controlled to stop moving and the bag hanging device is controlled to release the ton bag; the bag hanging device is controlled to lift and the weight information Mz measured by the weighing sensor is obtained; if the weight information Mz measured by the weighing sensor does not change, it is judged that the stacking is completed; otherwise, it is judged that the stacking is not completed.

[0144] Specifically, refer to the following examples:

[0145] The bag hanging device 30 descends to its lowest position (the bag hanging position—the height for a single ton bag), and the four hanging hooks of the first ton bag are hung on the hook assembly 31 of the bag hanging device 30. The bag stacking mechanism is activated, and the first drive mechanism rotates forward, driving the drive shaft, which raises the chain, pulling the bag hanging device 30 upward along the guide rail 121 of the main frame 12 to a set height. This height allows the second ton bag to be placed below the first ton bag without affecting the first ton bag. At this point, the load cell 40 carrying the first ton bag samples an analog signal, which is converted into a digital signal and recorded as the weight M1 of the first ton bag. It should be understood that when the first ton bag is not hung, the weight information measured by the load cell (the combined weight of the frame and the bag hanging device) should preferably be reset to zero to facilitate subsequent calculations. However, this does not have to be reset. If it is not reset, the subsequent weight information will be the sum of the weight of the first ton bag and the weight of the frame and the bag hanging device.

[0146] The second ton bag is delivered to the bag stacking position directly below the bag stacking mechanism (directly opposite the bag hanging device 30) through the conveying platform 21.

[0147] The bag stacking mechanism automatically activates, the first drive mechanism reverses, driving the active shaft to rotate, the chain descending, and the bag hanging device 30 descending along the guide rail 121 of the main frame 12. During this slow descent, the load cell 40 on the hanging device 30 carrying the ton bag continuously samples analog signals, which are converted into digital signals to obtain a real-time sampled weight value Mx. Similarly, this sampled weight value Mx can be the weight after subtracting the total weight of the frame and bag hanging device, or it can be the sum of the weight of the first ton bag and the total weight of the frame and bag hanging device.

[0148] When the following two conditions are met, the bag stacking mechanism is controlled to stop the lowering action of the bag hanging device 30, completing the bag stacking. Condition 1 is: when the sampled weight value Mx is the weight information after removing the total weight information of the bracket and the bag hanging device, the difference between it and the weight information M1 of the first ton bag should be close to the weight information M1 of the first ton bag. In other words, the sampled weight value Mx should be close to 0; when the sampled weight value Mx is the sum of the weight information of the first ton bag and the total weight information of the bracket and the bag hanging device, the difference between it and the weight information M1 of the first ton bag should also be close to the weight information M1 of the first ton bag. In other words, the sampled weight value Mx should be close to the sum of the weight information of the bracket and the bag hanging device. Here, close can be understood as that the difference between the sampled weight value Mx and 0 or the sum of the weight information of the bracket and the bag hanging device is within a certain preset range. The preset range can be an interval value, such as 0kg to 0.5kg, but is not limited to this. Condition 2 is: obtain a real-time sampled weight value at a certain interval, for example, sampling at 200ms and 500ms respectively, and determine the change in weight between the two times.

[0149] If the weights of the two measurements no longer change, the hook assembly 31 of the bag hanging device 30, driven by the drive structure, automatically opens the hook body, allowing the hanging hook of the first ton bag to automatically leave the hook body. At this time, the first drive mechanism rotates forward, driving the active shaft to rotate, the chain rises, and pulls the bag hanging device 30 upward along the guide rail 121 of the main frame 12. At this time, the weighing sensor 40 on the bag hanging device 30 samples an analog signal, which is converted into a digital signal to obtain real-time weight information Mz. If the weight information Mz does not change, the bag is automatically judged to be released successfully, and the bag hanging device 30 is controlled to continue to rise to the specified position. If the weight information Mz increases, the bag release is judged to have failed and the bag release action needs to be executed again.

[0150] After the bag is loosened, the conveying device 20 is started to deliver the ton bag that has been stacked, and the entire stacking action is completed.

[0151] Compared with the existing technology, the ton bag stacking mechanism and stacking method of the present invention can automatically control the stacking process according to weight changes, automatically adapt to ton bags of different sizes and heights, are stable and reliable, realize automatic stacking, and solve the efficiency problems in the existing technology.

[0152] The ton bag stacking mechanism and stacking method of the present invention realize automatic unhooking of the ton bag by setting a hook component; it can automatically judge whether the unhooking is successful according to the weight change, and perform relevant operations according to the specific situation to ensure successful unhooking.

[0153] The ton bag stacking mechanism and stacking method of the present invention enable the conveying device or the bag hanging device or the entire frame to have a weight detection function through the provision of a weighing sensor, automatically controls the stacking process according to weight changes, improves stacking efficiency, saves human resources, and enhances the aesthetics of stacking.

[0154] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0155] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A ton bag stacking mechanism, characterized in that: include: frame; The conveying device includes a conveying platform; as well as a bag hanging device, disposed on the frame and located above the conveying device, the bag hanging device being capable of rising or falling relative to the conveying device, the bag hanging device comprising a hook assembly; Wherein, the conveying device is provided with a weighing sensor for weighing the weight of the material on the conveying platform, or; The bag hanging device is provided with a weighing sensor for weighing the weight of the material on the hook assembly, or; A weighing sensor is provided on the frame for weighing the weight of the material on the bag hanging device.

2. The ton bag stacking mechanism according to claim 1, characterized in that: The bag hanging device further comprises a bracket, which is connected to the frame and can rise or fall relative to the conveying device, and the hook assembly is hung on the bracket through the weighing sensor.

3. The ton bag stacking mechanism according to claim 2, characterized in that: There are multiple groups of hook components, and the hook components are arranged in a one-to-one correspondence with the hanging hooks on the ton bag.

4. The ton bag stacking mechanism according to claim 3, characterized in that: The number of the weighing sensors is multiple groups, and the weighing sensors are arranged in a one-to-one correspondence with the hook components.

5. The ton bag stacking mechanism according to claim 1, characterized in that: The conveying device includes a support frame, and the conveying platform is supported on the support frame through the weighing sensor; or The weighing sensor is arranged between the conveying device and the ground.

6. The ton bag stacking mechanism according to claim 1, characterized in that: The frame body comprises a support body arranged transversely and a main body bracket arranged longitudinally on the support body. The bag hanging device is arranged on the main body bracket and can move longitudinally along the main body bracket.

7. The ton bag stacking mechanism according to claim 6, characterized in that: The weighing sensor is arranged between the support body and the main frame; or, The weighing sensor is arranged between the support body and the ground.

8. The ton bag stacking mechanism according to claim 6, characterized in that: The main frame is provided with a guide rail, the bag hanging device is slidably arranged on the guide rail through a guide roller, and the main frame is provided with a lifting device, which acts on the bag hanging device to make it rise or fall relative to the conveying device.

9. A method for stacking ton bags based on the stacking mechanism according to any one of claims 1 to 8, wherein: The weighing sensor is arranged on the conveying device, and is characterized in that the stacking method includes: Obtain weight information M1 of the first ton of bags weighed by the weighing sensor; Obtain the weight information M2 of the second ton bag measured by the weighing sensor, and calculate the total weight information Mt of the two ton bags; Obtain the weight information Mp measured by the weighing sensor when the first ton bag is stacked on the second ton bag; When the difference between the weight information Mp measured by the weighing sensor and the total weight information Mt is within a preset range, the weight information Mp measured by the weighing sensor is obtained multiple times at intervals of a certain time period; Whether the stacking is completed is determined based on the change in the weight information Mp measured by the weighing sensor.

10. The stacking method according to claim 9, characterized in that: Obtain the weight information M1 of the first ton of bags weighed by the weighing sensor, including: Obtain weight information M0 of an empty conveying platform or conveying device; The first ton bag is conveyed to the bottom of the bag hanging device via the conveying platform, and first weight information M3 of the conveying platform or conveying device carrying the first ton bag is obtained; The weight information M1 of the first ton bag is obtained by calculating the difference between the first weight information M3 and the weight information M0 of the conveying platform or the conveying device.

11. The stacking method according to claim 9, characterized in that: Obtain the weight information M2 of the second ton bag weighed by the weighing sensor, including: Obtain weight information M0 of an empty conveying platform or conveying device; Lift the first ton of bags to a certain height through the bag hanging device; Convey the second ton bag to the bottom of the first ton bag via the conveying platform, and obtain second weight information M4 of the conveying platform or conveying device carrying the second ton bag; The difference between the second weight information M4 and the weight information M0 of the conveying platform or the conveying device is calculated to obtain the weight information M2 of the second ton bag.

12. The stacking method according to claim 9, characterized in that: Judging whether the stacking is completed based on the change of the weight information Mp obtained from the weighing sensor includes: If the weight information Mp obtained by the weighing sensor does not change, the bag hanging device is controlled to stop moving and the bag hanging device is controlled to release the ton bag; Control the lifting of the bag hanging device and obtain the weight information Mm measured by the weighing sensor; If the weight information Mm measured by the weighing sensor does not change, it is determined that the stacking is completed; Otherwise, it is determined that the stacking is incomplete.

13. A method for stacking ton bags based on the stacking mechanism according to any one of claims 1 to 8, wherein: The weighing sensor is arranged on the conveying device, and is characterized in that the stacking method includes: Obtain weight information M0 of an empty conveying platform or conveying device; Obtain weight information M1 of the first ton of bags weighed by the weighing sensor; Obtaining second weight information M4 of the conveying platform or conveying device carrying the second ton bag, and calculating the total weight information of the second weight information M4 and the first ton bag; Obtain the weight information Mp measured by the weighing sensor when the first ton bag is stacked on the second ton bag; When the difference between the weight information Mp measured by the weighing sensor and the total weight information is within a preset range, the weight information Mp measured by the weighing sensor is obtained multiple times at intervals of a certain time period; Whether the stacking is completed is determined based on the change in the weight information Mp measured by the weighing sensor.

14. A stacking method based on the ton bag stacking mechanism according to any one of claims 1 to 8, wherein: The weighing sensor is arranged on the bag hanging device, or the weighing sensor is arranged on the frame, and the stacking method includes: Obtain weight information M1 of the first ton of bags weighed by the weighing sensor; Obtaining the weight information Mx measured by the weighing sensor when the first ton bag is stacked on the second ton bag; When the difference between the weight information Mx measured by the weighing sensor and the weight information M1 of the first ton bag is within a preset range, the weight information Mx measured by the weighing sensor is obtained multiple times at intervals of a certain time period; Whether the stacking is completed is determined based on the change in the weight information Mx obtained from the weighing sensor.

15. The stacking method according to claim 14, characterized in that: Judging whether the stacking is completed based on the change of the weight information Mx obtained from the weighing sensor includes: If the weight information Mx obtained by the weighing sensor does not change, the bag hanging device is controlled to stop moving and the bag hanging device is controlled to release the ton bag; Control the lifting of the bag hanging device and obtain the weight information Mz measured by the weighing sensor; If the weight information Mz measured by the weighing sensor does not change, it is determined that the stacking is completed; Otherwise, it is determined that the stacking is incomplete.

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