Stacking mechanism for sheet material

Abstract

The present application belongs to the technical field of sanitary products, and particularly relates to a sheet material stacking mechanism, which comprises a conveying device, an air claw device and a pressing rod device. The conveying device comprises a flat belt, which is used for containing sheet materials and conveying the stacked sheet materials. The air claw device comprises an air claw moving assembly and an air claw assembly. The air claw assembly is arranged above the flat belt. The air claw moving assembly drives the air claw assembly to move back and forth along the conveying direction of the flat belt. The air claw assembly is used for grabbing or releasing the sheet materials. The pressing rod device comprises a pressing rod driving assembly and two groups of pressing rod assemblies. The pressing rod assembly comprises a pressing rod, a lifting plate and a pressing rod cylinder. The two groups of pressing rods are arranged on the two sides above the flat belt. The pressing rod cylinder is arranged on the lifting plate. The pressing rod driving assembly drives the lifting plate to lift along the height direction of the flat belt. When the two groups of pressing rods move close to each other, the pressing rods are lowered to press the two sides of the sheet materials located at the input end of the flat belt.

Description

Technical Field

[0001] The present invention belongs to the technical field of sanitary products, and in particular relates to a stacking mechanism for sheet materials. Background Art

[0002] In the field of sanitary products, such as diapers, sanitary napkins, and disposable diapers, non-woven fabrics are often used as raw materials. During the non-woven fabric production process, large sheets of non-woven fabric need to be stacked. Due to the large area and soft texture of the products, vertically stacking multiple layers of continuously output products is difficult. Existing technology cannot achieve the desired effect and cannot achieve automated stacking. The currently commonly used stacking method in the market is purely manual. Existing stacking equipment is complex, simple in structure, and has a low degree of automation. It cannot adapt to high-speed production lines and has low production efficiency. Summary of the Invention

[0003] In order to solve the problem of difficulty in stacking sheet-like soft materials in the prior art, the present invention provides a stacking mechanism for sheet-like materials.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a stacking mechanism for sheet materials, comprising:

[0005] A conveying device, the conveying device comprising a flat belt, the flat belt being used to hold the sheet material and convey the stacked sheet material;

[0006] An air gripper device, comprising an air gripper moving assembly and an air gripper assembly, wherein the air gripper assembly is disposed above the flat belt, the air gripper moving assembly being used to drive the air gripper assembly to move forward and backward along the conveying direction of the flat belt, and the air gripper assembly being used to grab or release sheet materials. When the air gripper moving assembly drives the air gripper assembly to move forward, the air gripper assembly grabs the sheet materials conveyed from the front, and when the air gripper moving assembly drives the air gripper assembly to move backward, the air gripper assembly releases the grabbed sheet materials to the input end of the flat belt;

[0007] And a pressure rod device, the pressure rod device includes a pressure rod drive assembly and two groups of pressure rod assemblies, the pressure rod assembly includes a pressure rod, a lifting plate and a pressure rod cylinder, the two groups of pressure rods are arranged on both sides above the flat belt, the pressure rod cylinders are arranged on the lifting plate, the two groups of pressure rod cylinders are used to drive the two groups of pressure rods to move closer to or away from each other along the width direction of the flat belt, the pressure rod drive assembly is used to drive the lifting plate to lift and lower along the height direction of the flat belt, when the two groups of pressure rods move closer to each other and the pressure rods descend, the pressure rods press both sides of the sheet material located at the input end of the flat belt.

[0008] Preferably, the pressure bar assembly further comprises a pressure bar bracket, a lifting block, and a tension spring. The pressure bar bracket is fixedly arranged, and the lifting plate and lifting block are slidably arranged on the pressure bar bracket along the height direction of the flat belt. The lifting plate is located above the lifting block. The ends of the tension spring are respectively connected to the lifting plate and the lifting block. The pressure bar drive assembly drives the lifting block to rise and fall along the height direction of the flat belt, thereby driving the lifting plate to rise and fall along the height direction of the flat belt. The pressure bar assembly has a simple structure and stable and reliable operation. Under the action of the tension spring, the pressure bar flexibly presses downward, protecting both the product and the mechanism, and can adapt to different stacking heights of products.

[0009] Furthermore, the pressure rod drive assembly includes a first synchronous belt drive structure. Two sets of the first synchronous belt drive structures are synchronously linked via a main shaft driven by a first motor. The lifting block is connected to the synchronous belt of the first synchronous belt drive structure. The structure of the pressure rod drive assembly is simple and reliable, ensuring that the pressure rods on both sides press down simultaneously, improving the reliability and stability of stacking.

[0010] Preferably, the pneumatic gripper moving assembly includes a second synchronous belt drive structure driven by a second motor and a movable bracket connected to a synchronous belt of the second synchronous belt drive structure, with the pneumatic gripper assembly mounted on the movable bracket. The pneumatic gripper moving assembly has a simple structure, stable and reliable operation, and low cost.

[0011] Furthermore, the gripper assembly includes a swing arm and several grippers. One end of the swing arm is rotatably mounted on a movable support. The swing arm is driven up and down by a third motor. A gripper mounting plate is provided at the end of the swing arm away from the movable support. Several grippers are sequentially positioned on the gripper mounting plate along the width of the flat belt. The grippers simultaneously grasp one side of the sheet material, i.e., they are sequentially positioned along that side of the sheet material. This improves the reliability and stability of gripping the sheet material and enhances stacking accuracy.

[0012] Furthermore, the air gripper moving assembly and the air gripper assembly are each provided with two groups, and the two groups of the air gripper moving assemblies are arranged in parallel. The two groups of air gripper assemblies work alternately, effectively improving the stacking efficiency.

[0013] Preferably, the conveying device further comprises a conveying frame, a driving pulley, a driven pulley, and a conveying motor, wherein the flat belt is mounted on the conveying frame via the driving pulley and the driven pulley, and the output end of the conveying motor is in driving connection with the driving pulley. The conveying device has a simple structure, stable and reliable operation, and low cost.

[0014] Preferably, the pressure rods press the tail ends of the sheet material on both sides, effectively preventing the air gripper from lifting the top layer of the stacked product when pulling the last product, thereby improving the reliability, stability and accuracy of the stacking.

[0015] Preferably, the stacking mechanism further comprises a frame, and the conveying device, the air gripper device and the pressure rod device are all arranged on the frame, so that the stacking mechanism is integrated and easy to move to different production lines.

[0016] Furthermore, the frame includes a bottom frame, a top frame, and uprights, wherein the bottom ends of the uprights are connected to the bottom frame, and the top ends of the uprights are connected to the top frame. The conveying device and the pressure rod device are both disposed on the bottom frame, and the air gripper device is disposed on the top frame. The frame structure is simple and reliable, easy to set up, and low in cost.

[0017] Beneficial effects:

[0018] 1. The stacking mechanism for sheet materials of the present invention utilizes an air gripper device to automatically grasp, move, and release products, thereby improving the alignment of product stacking and stacking efficiency.

[0019] 2. The stacking mechanism for sheet materials of the present invention allows the pressure rod to press the stacked products while the air gripper is moving the products, effectively preventing the air gripper from lifting the top layer of the stack when pulling the next product, thereby significantly improving the stacking accuracy and efficiency.

[0020] 3. The stacking mechanism of the sheet material of the present invention stacks the sheet material directly on the flat belt, and after the stacking is completed, the flat belt directly transports the sheet material backward, which improves the convenience of operation, helps to reduce costs, and increase the speed, so that the stacking mechanism can be compatible with high-speed production lines;

[0021] 4. The stacking mechanism for sheet materials of the present invention has a simple and reliable structure, ingenious design, reasonable and compact layout, stable operation, convenient operation, low cost and good market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 is a side view schematic diagram of embodiment 1 of the stacking mechanism for sheet materials of the present invention;

[0024] Figure 2 1 is a schematic front view of a first embodiment of a stacking mechanism for sheet materials according to the present invention, wherein the air gripper device, the top frame and the columns are not shown;

[0025] Figure 3 1 is a side view schematic diagram of an air gripper device of Example 1 of a stacking mechanism for sheet materials of the present invention;

[0026] Figure 4 1 is a schematic front view of a second embodiment of a stacking mechanism for sheet materials according to the present invention, wherein the air gripper device, the top frame and the columns are not shown;

[0027] Figure 5 is a side view schematic diagram of an air gripper device of Example 2 of a stacking mechanism for sheet materials of the present invention;

[0028] In the figure: 1. Conveying device, 11. Flat belt, 12. Conveying frame, 13. Driving pulley, 14. Driven pulley, 15. Conveying motor; 2. Air claw device, 21. Air claw moving assembly, 211. Second synchronous belt transmission structure, 212. Moving bracket, 213. Second motor, 22. Air claw assembly, 221. Swing arm, 222. Air claw, 223. Third motor, 224. Air claw fixing plate; 3. Pressure rod device, 31. Pressure rod driving assembly, 311. First synchronous belt transmission structure, 312. Spindle, 313. First motor, 32. Pressure rod assembly, 321. Pressure rod, 322. Lifting plate, 323. Pressure rod cylinder, 324. Pressure rod bracket, 325. Lifting block, 326. Tension spring; 4. Frame, 41. Bottom frame, 42. Top frame, 43. Column; 5. Sheet material (product). DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] like Figure 1 、 Figure 2 and Figure 3As shown, a stacking mechanism for sheet materials includes a conveying device 1, an air gripper device 2 and a pressure rod device 3. The conveying device 1 includes a flat belt 11, and the flat belt 11 is used to hold sheet materials 5 and convey the stacked sheet materials 5; the air gripper device 2 includes an air gripper moving component 21 and an air gripper component 22. The air gripper component 22 is arranged above the flat belt 11. The air gripper moving component 21 is used to drive the air gripper component 22 to move forward and backward along the conveying direction (length direction) of the flat belt 11. The air gripper component 22 is used to grab or release the sheet material 5. When the air gripper moving component 21 drives the air gripper component 22 to move forward, the air gripper component 22 grabs the sheet material 5 conveyed from the front. When the air gripper moving component 21 drives the air gripper component 22 to move backward, the air gripper The component 22 releases the grabbed sheet material 5 to the input end of the flat belt 11; the pressure rod device 3 includes a pressure rod driving component 31 and two groups of pressure rod components 32, the pressure rod components 32 include a pressure rod 321, a lifting plate 322 and a pressure rod cylinder 323, the two groups of the pressure rods 321 are arranged on both sides above the flat belt 11, and the pressure rod cylinder 323 is arranged on the lifting plate 322. The two groups of the pressure rod cylinders 323 are used to drive the two groups of the pressure rods 321 to move closer to or away from each other along the width direction of the flat belt 11, and the pressure rod driving component 31 is used to drive the lifting plate 322 to rise and fall in the height direction of the flat belt 11. When the two groups of the pressure rods 321 move closer to each other and the pressure rods 321 descend, the pressure rods 321 press on both sides of the sheet material 5 located at the input end of the flat belt 11.

[0032] In order to optimize the integration of the stacking mechanism, in this embodiment, as Figure 1 As shown, the stacking mechanism also includes a frame 4, and the conveying device 1, the air gripper device 2 and the pressure rod device 3 are all arranged on the frame 4; specifically, in this embodiment, the frame 4 includes a bottom frame 41, a top frame 42 and a column 43, the bottom end of the column 43 is connected to the bottom frame 41, and the top end of the column 43 is connected to the top frame 42, the conveying device 1 and the pressure rod device 3 are both arranged on the bottom frame 41, and the air gripper device 2 is arranged on the top frame 42.

[0033] In order to ensure that the two groups of pressure rods 321 are pressed down stably and reliably at the same time, in this embodiment, Figure 1 and Figure 2As shown, the pressure rod assembly 32 also includes a pressure rod bracket 324, a lifting block 325 and a tension spring 326. The pressure rod bracket 324 is fixedly set on the bottom frame 41, and the lifting plate 322 and the lifting block 325 are slidably set on the pressure rod bracket 324 along the height direction of the flat belt 11. The lifting plate 322 is located above the lifting block 325, and the two ends of the tension spring 326 are respectively connected to the lifting plate 322 and the lifting block 325. The pressure rod driving assembly 31 drives the lifting block 325 to rise and fall along the height direction of the flat belt 11 to drive the lifting plate 322 to rise and fall along the height direction of the flat belt 11. The lifting plate 322 of this embodiment is provided with a guide groove that cooperates with the pressure rod 321; further In this embodiment, the pressure rod drive assembly 31 includes a first synchronous belt transmission structure 311. The first synchronous belt transmission structure 311 of this embodiment is arranged on the pressure rod bracket 324. The two groups of the first synchronous belt transmission structures 311 are synchronously linked through the main shaft 312. The main shaft 312 is driven by a first motor 313. The first motor 313 of this embodiment is arranged on the bottom frame 41. The lifting block 325 is connected to the synchronous belt of the first synchronous belt transmission structure 311; further, in this embodiment, the pressure rod 321 presses the two side tails of the sheet material 5, effectively preventing the air claw 222 from lifting the top product 5 of the stack when pulling the last product 5, thereby improving the reliability, stability and accuracy of the stacking.

[0034] In order to ensure that the air gripper 222 can stably and reliably grasp and release the sheet material 5, in this embodiment, as shown in FIG. Figure 1 and Figure 3 As shown, the air gripper moving assembly 21 includes a second synchronous belt transmission structure 211 and a movable bracket 212, and the second synchronous belt transmission structure 211 is driven by a second motor 213. The second synchronous belt transmission structure 211 and the second motor 213 of this embodiment are both arranged on the top frame 42, and the movable bracket 212 is connected to the synchronous belt of the second synchronous belt transmission structure 211, and the air gripper assembly 22 is arranged on the movable bracket 212; further, in this embodiment, the air gripper assembly 22 includes a swing arm 221 and a plurality of air grippers 222, one end of the swing arm 221 is rotatably set on the movable bracket 212, and the swing arm 221 is driven to swing up and down by the third motor 223, and an air gripper fixing plate 224 is provided at the end of the swing arm 221 away from the movable bracket 212, and a plurality of the air grippers 222 are arranged on the air gripper fixing plate 224 in sequence along the width direction of the flat belt 11.

[0035] In order to stably and reliably stack and transport the stacked sheet materials 5, in this embodiment, as shown in FIG. Figure 1 and Figure 2As shown, the conveying device 1 also includes a conveying frame 12, a driving pulley 13, a driven pulley 14 and a conveying motor 15. The conveying frame 12 of this embodiment is arranged on the bottom frame 41, and the flat belt 11 is arranged on the conveying frame 12 through the driving pulley 13 and the driven pulley 14. The conveying motor 15 of this embodiment is arranged on the conveying frame 12, and the output end of the conveying motor 15 is connected to the driving pulley 13 in a transmission manner.

[0036] Here’s how it works:

[0037] like Figure 1 As shown, first, the sheet material 5 (product 5) to be stacked is output from the previous process to position b in sequence;

[0038] At the same time, the second motor 213 drives the air claw assembly 22 to move forward through the second synchronous belt transmission structure 211 until the air claw 222 stops at position a, and then the third motor 223 drives the swing arm 221 to rotate downward, so that the swing arm 221 drives the air claw 222 to descend to position b and stop. At this time, the product 5 is conveyed to the end of the air claw 222, and the air claw 222 clamps it. Then the second motor 213 drives the air claw assembly 22 to move backward until the product 5 reaches position c and stops. Then the air claw 222 releases the product 5, and the product 5 falls into the predetermined position E (flat belt 11). The input end of the flat belt 11) is shown. During the process of the product 5 moving from position b to position c, the pressing rod 321 keeps pressing the tail ends of the product 5 on both sides at position E. Then, the third motor 223 drives the swing arm 221 to rotate upward, so that the swing arm 221 drives the air gripper 222 to rise to position d and stop. Then, the second motor 213 drives the air gripper assembly 22 forward until the air gripper 222 stops at position a. At this time, the air gripper device 2 completes one cycle of operation. The air gripper device 2 repeats this action to continuously transfer the product 5 to position E of the flat belt 11 for stacking.

[0039] When the air gripper 222 moves the product 5 from position b to position c, the pressure rod 321 presses the two side tails of the product 5 at position E to prevent the air gripper 222 from lifting the top product 5 of the stack when pulling the last product 5; when the product 5 falls into position E of the flat belt 11, the pressure rod 321 completes the contraction, rising, extension and descending actions in sequence until the two groups of pressure rods 321 press the two side tails of the stack of products 5 again, and the pressure rod 321 repeats the above actions until the stacked products 5 reach the set number, and the conveying device 1 drives the flat belt 11 to convey the stacked products 5 to position F. At this time, the flat belt 11 pauses, and the next stacking work is carried out at position E of the flat belt 11.

[0040] Example 2

[0041] like Figure 1 、 Figure 4 and Figure 5As shown, this embodiment differs from Embodiment 1 in that two sets of gripper moving assemblies 21 and gripper assemblies 22 are each provided. The two sets of gripper moving assemblies 21 are arranged in parallel, and the two sets of gripper assemblies 22 operate alternately, effectively improving stacking efficiency. The working process is as follows: When the gripper 222 of the second gripper device 2 moves forward to position a, the gripper 222 of the first gripper device 2 simultaneously moves backward to position c. Then, when the gripper 222 of the second gripper device 2 moves downward to position b, the gripper 222 of the first gripper device 2 simultaneously moves upward to position d. Then, the gripper 222 of the second gripper device 2 clamps the product 5, drags the product 5 backward to position c, and releases the product 5. Simultaneously, the gripper 222 of the first gripper device 2 moves forward to position a. At this point, the first and second gripper devices 2 exchange positions. The above operation is repeated to continuously transfer the product 5.

[0042] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A stacking mechanism for sheet materials, characterized in that: include, A conveying device (1), the conveying device (1) comprising a flat belt (11), the flat belt (11) being used for holding sheet materials (5) and conveying the stacked sheet materials (5); An air gripper device (2), the air gripper device (2) comprising an air gripper moving assembly (21) and an air gripper assembly (22), the air gripper assembly (22) being arranged above a flat belt (11), the air gripper moving assembly (21) being used to drive the air gripper assembly (22) to move forward and backward along the conveying direction of the flat belt (11), the air gripper assembly (22) being used to grasp or release a sheet material (5), when the air gripper moving assembly (21) drives the air gripper assembly (22) to move forward, the air gripper assembly (22) grasps the sheet material (5) conveyed from the front, and when the air gripper moving assembly (21) drives the air gripper assembly (22) to move backward, the air gripper assembly (22) releases the grasped sheet material (5) to the input end of the flat belt (11); And a pressure rod device (3), the pressure rod device (3) includes a pressure rod driving assembly (31) and two groups of pressure rod assemblies (32), the pressure rod assembly (32) includes a pressure rod (321), a lifting plate (322) and a pressure rod cylinder (323), the two groups of pressure rods (321) are arranged on both sides above the flat belt (11), the pressure rod cylinder (323) is arranged on the lifting plate (322), the two groups of pressure rod cylinders (323) are used to drive the two groups of pressure rods (321) to move closer to or away from each other along the width direction of the flat belt (11), the pressure rod driving assembly (31) is used to drive the lifting plate (322) to move up and down along the height direction of the flat belt (11), when the two groups of pressure rods (321) move closer to each other and the pressure rods (321) descend, the pressure rods (321) press the two sides of the sheet material (5) located at the input end of the flat belt (11).

2. The stacking mechanism for sheet materials according to claim 1, characterized in that: The pressure rod assembly (32) further comprises a pressure rod bracket (324), a lifting block (325) and a tension spring (326); the pressure rod bracket (324) is fixedly arranged; the lifting plate (322) and the lifting block (325) are slidably arranged on the pressure rod bracket (324) along the height direction of the flat belt (11); the lifting plate (322) is located above the lifting block (325); the two ends of the tension spring (326) are respectively connected to the lifting plate (322) and the lifting block (325); the pressure rod driving assembly (31) drives the lifting block (325) to rise and fall along the height direction of the flat belt (11), so as to drive the lifting plate (322) to rise and fall along the height direction of the flat belt (11).

3. The stacking mechanism for sheet materials according to claim 2, characterized in that: The pressure rod drive assembly (31) includes a first synchronous belt transmission structure (311), two groups of the first synchronous belt transmission structures (311) are synchronously linked through a main shaft (312), the main shaft (312) is driven by a first motor (313), and the lifting block (325) is connected to the synchronous belt of the first synchronous belt transmission structure (311).

4. The stacking mechanism for sheet materials according to claim 1, wherein: The air gripper moving assembly (21) comprises a second synchronous belt transmission structure (211) and a moving bracket (212), wherein the second synchronous belt transmission structure (211) is driven by a second motor (213), the moving bracket (212) is connected to the synchronous belt of the second synchronous belt transmission structure (211), and the air gripper assembly (22) is arranged on the moving bracket (212).

5. The stacking mechanism for sheet materials according to claim 4, characterized in that: The air gripper assembly (22) comprises a swing arm (221) and a plurality of air grippers (222). One end of the swing arm (221) is rotatably arranged on a movable bracket (212). The swing arm (221) is driven by a third motor (223) to swing up and down. An air gripper fixing plate (224) is provided at one end of the swing arm (221) away from the movable bracket (212). The plurality of air grippers (222) are sequentially arranged on the air gripper fixing plate (224) along the width direction of the flat belt (11).

6. The stacking mechanism for sheet materials according to claim 5, characterized in that: The air gripper moving assembly (21) and the air gripper assembly (22) are both provided in two groups, and the two groups of the air gripper moving assembly (21) are provided in parallel.

7. The stacking mechanism for sheet materials according to claim 1, characterized in that: The conveying device (1) further comprises a conveying frame (12), a driving pulley (13), a driven pulley (14) and a conveying motor (15); the flat belt (11) is arranged on the conveying frame (12) via the driving pulley (13) and the driven pulley (14); the output end of the conveying motor (15) is in transmission connection with the driving pulley (13).

8. The sheet material stacking mechanism according to claim 1, characterized in that: The pressing rods (321) press the tails on both sides of the sheet material (5).

9. The sheet material stacking mechanism according to any one of claims 1 to 8, characterized in that: The stacking mechanism also includes a frame (4), and the conveying device (1), the air claw device (2) and the pressure rod device (3) are all arranged on the frame (4).

10. The sheet material stacking mechanism according to claim 9, characterized in that: The frame (4) includes a bottom frame (41), a top frame (42) and a column (43), the bottom end of the column (43) is connected to the bottom frame (41), and the top end of the column (43) is connected to the top frame (42). The conveying device (1) and the pressure rod device (3) are both arranged on the bottom frame (41), and the air claw device (2) is arranged on the top frame (42).

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