Automatic napkin flattening device

Abstract

The utility model relates to the technical field of napkin processing, in particular to an automatic napkin flattening device which comprises a rack, a flattening assembly, a pressing assembly and a positioning assembly. The flattening assembly is composed of a conveying belt, the conveying belt comprises a flexible plate, an elastic ring belt and a supporting strip, and an adsorption groove and an air guide groove are formed in the flexible plate and matched with the first feeding port and the second feeding port to achieve adsorption and fixation of napkins; the flattening assembly applies flattening constraining force to the napkins through an air cylinder and a flattening hole; the positioning assembly uses a hard pad and a limiting hole to limit the napkin. By means of the napkin paper flattening device, napkin paper can be automatically adsorbed, fixed and rapidly flattened, manual intervention is not needed, the flattening efficiency is remarkably improved, and meanwhile operation safety and simplicity are guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of automation equipment technology, specifically an automatic napkin flattening device. Background Technology

[0002] Napkins are a common household item widely used in restaurants, homes, and various public places in the catering service and daily life. To improve the user experience and aesthetics, napkins usually need to be flattened before placement or use. However, currently, napkin flattening mainly relies on manual labor. This method is not only inefficient, but also prone to inconsistencies in flattening results due to human factors in large-scale catering service scenarios, affecting the overall service quality. In addition, existing automated equipment is mostly focused on the folding or dispensing of napkins, lacking a dedicated function design for automatic napkin flattening, making it difficult to meet the demand for efficient and precise flattening. Therefore, developing a device that can automatically flatten napkins to solve the problems of low efficiency and poor consistency in existing manual operations has significant practical value and market prospects. Utility Model Content

[0003] The purpose of this utility model is to provide an automatic napkin flattening device to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: an automatic napkin flattening device, including a frame; and further including: a flattening assembly, the flattening assembly including a conveyor belt, the conveyor belt being disposed within the frame, the conveyor belt mainly consisting of several flexible plates, an elastic ring belt, and several support bars, the several flexible plates being fixedly mounted on the outer peripheral wall of the elastic ring belt, and each support bar being disposed between two corresponding flexible plates and fixedly connected to the elastic ring belt and the two corresponding flexible plates, the elastic ring belt having a driving mechanism, and the flexible plates having adsorption grooves, the bottom of the adsorption grooves having... The device includes an air guide channel, and a first feed inlet and a second feed inlet fixedly installed on the outer wall of the frame at positions corresponding to the adsorption tank. A first soft pad is fixedly installed inside the wall of the first feed inlet, and a second soft pad is fixedly installed inside the wall of the flexible plate at positions corresponding to the first soft pad. The top sides of both the first and second soft pads are coplanar with the bottom of the adsorption tank. A flattening assembly is located inside the frame and applies a flattening constraint force to the napkins in the adsorption tank. A positioning assembly is located inside the frame and applies a limiting constraint force to the napkins in the second feed inlet.

[0004] Preferably, the drive mechanism includes two motors, which are fixedly mounted on the outer wall of the frame. A transmission roller is provided at each of the four corners of the elastic ring belt, and the outer peripheral wall of each transmission roller is interference-fitted with the inner ring wall of the elastic ring belt. Both ends of the transmission roller rotatably penetrate the shell wall of the frame, and the end of the transmission roller near the motor is fixedly connected to the corresponding output end of the corresponding motor.

[0005] Preferably, a guide plate is fixedly installed on the top side of the frame, and the bottom side of the guide plate is in contact with the top side of the corresponding flexible plate.

[0006] Preferably, both sides of the elastic ring and both ends of the flexible plate are in contact with the inner wall of the frame, and the opposite surfaces of the first feed inlet and the second feed inlet are coplanar with the inner wall of the frame.

[0007] Preferably, the flattening assembly includes a cylinder, which is located at the middle position within the elastic ring belt, and the telescopic end of the cylinder is fixedly inserted through the shell wall of the frame. The bottom of the adsorption tank is provided with two sets of flattening holes, and some of the flattening holes in the two sets are staggered. The interior of the flattening holes communicates with the interior of the elastic ring belt.

[0008] Preferably, the positioning component includes a rigid pad, a limiting groove is formed at the bottom of the second feed inlet, and the bottom of the rigid pad is inserted into the limiting groove and fixedly connected to the inner wall of the limiting groove. The corners of the top side of the rigid pad are arc-shaped, and a plurality of limiting holes are formed on the rigid pad, with equal spacing between two adjacent limiting holes.

[0009] Preferably, the elastic ring belt is provided with a partition, and the partition is located on the top side of the cylinder. Both ends of the partition are fixedly connected to the inner wall of the frame, and the top side of the partition is in contact with the inner wall of the elastic ring belt. The corners of the partition are arc-shaped.

[0010] Preferably, an air guide pipe is fixedly installed inside the partition, and several exhaust ends of the air guide pipe extend to the bottom end of the corresponding flattening hole. Several exhaust ends of the air guide pipe are coplanar with the top side of the partition. The exhaust ends of the air guide pipe penetrate the shell wall of the frame and extend into the limiting groove. The air guide pipe is fixedly connected to the shell wall of the frame and the groove wall of the second feed inlet.

[0011] Preferably, an air passage is provided on the side wall of the air guide groove at the position corresponding to the flattening hole, and the interior of the air passage is connected to the interior of the corresponding flattening hole.

[0012] Preferably, a one-way valve is fixedly installed at the air inlet end of the air guide pipe, and two air storage chambers are opened opposite each other at the positions of the two sets of flattening holes in the flexible plate, and the interior of each air storage chamber is connected to the interior of the corresponding flattening hole.

[0013] This utility model has the following beneficial effects: When using this automatic napkin flattening device, it can automatically complete the adsorption and fixation of napkins and quickly complete the flattening operation without requiring any other operation from the operator, thus improving the flattening efficiency of napkins. Moreover, the napkins are pushed into the flattening area from the feed port without the operator coming into contact with them, making the flattening operation simple and highly safe. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the automatic napkin flattening device of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the automatic napkin flattening device of this utility model.

[0016] Figure 3 This is a schematic diagram of the conveyor belt structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the flattening component and positioning component of this utility model.

[0018] The attached diagram is labeled as follows: 1. Frame; 2. Conveyor belt; 3. Flexible plate; 4. Elastic ring belt; 5. Support bar; 6. Drive mechanism; 7. Adsorption tank; 8. Air guide groove; 9. First feed inlet; 10. Second feed inlet; 11. First soft pad; 12. Second soft pad; 13. Motor; 14. Transmission roller; 15. Guide plate; 16. Cylinder; 17. Flattening hole; 18. Hard pad; 19. Limiting groove; 20. Limiting hole; 21. Partition plate; 22. Air guide pipe; 23. Exhaust end; 24. Ventilation groove; 25. One-way valve; 26. Air storage chamber. Detailed Implementation

[0019] This utility model relates to an automatic napkin flattening device, the specific implementation of which is described in conjunction with the appendix. Figure 1 To be continued Figure 4 A detailed description is provided below. The device includes a frame 1, conveyor belt 2, flexible plate 3, elastic ring belt 4, support bar 5, drive mechanism 6, adsorption tank 7, air guide groove 8, first feed inlet 9, second feed inlet 10, first soft pad 11, second soft pad 12, motor 13, transmission roller 14, guide plate 15, cylinder 16, flattening hole 17, hard pad 18, limiting groove 19, limiting hole 20, partition 21, air guide pipe 22, exhaust end 23, venting groove 24, one-way valve 25, and air storage chamber 26. The specific structure, function, and operating principle of each component will be described in detail below with reference to the accompanying drawings.

[0020] like Figure 1The diagram shows the overall structure of this utility model. The frame 1 serves as the main framework of the entire device, used to fix and support other components. The conveyor belt 2 is located inside the frame 1 and consists of several flexible plates 3, elastic ring belts 4, and several support bars 5. The flexible plates 3 are fixedly mounted on the outer peripheral wall of the elastic ring belts 4. Each support bar 5 is located between two corresponding flexible plates 3 and is fixedly connected to the elastic ring belts 4 and the flexible plates 3 to enhance the stability of the overall structure. The adsorption tank 7 is formed on the flexible plates 3, and the bottom of the adsorption tank 7 is provided with an air guide groove 8 for adsorbing and fixing the napkin. The first feed port 9 and the second feed port 10 are respectively fixedly installed through the outer wall of the frame 1 at positions corresponding to the adsorption tank 7. A first soft pad 11 is fixedly installed inside the wall of the first feed inlet 9. A second soft pad 12 is fixedly installed inside the wall of the flexible plate 3 at the position corresponding to the first soft pad 11. The top sides of the first soft pad 11 and the second soft pad 12 are coplanar with the bottom of the adsorption tank 7, thereby ensuring that the napkin can smoothly transition when entering the adsorption tank 7 and avoid damage caused by friction or collision.

[0021] like Figure 2 The diagram shows the internal structure of this utility model. The drive mechanism 6 includes two motors 13, which are fixedly mounted on the outer wall of the frame 1. A transmission roller 14 is provided at each of the four corners of the elastic ring belt 4. The outer peripheral wall of the transmission roller 14 is interference-fitted with the inner ring wall of the elastic ring belt 4. Both ends of the transmission roller 14 rotate through the shell wall of the frame 1. The end of the transmission roller 14 closest to the motor 13 is fixedly connected to the output end of the corresponding motor 13. The transmission roller 14 is driven to rotate by the motor 13, thereby driving the elastic ring belt 4 and the flexible plate 3 on it to circulate and achieve continuous conveying of the napkins. In addition, a guide plate 15 is fixedly mounted on the top side of the frame 1. The bottom side of the guide plate 15 contacts the top side of the corresponding flexible plate 3 to guide the napkins smoothly into the adsorption tank 7. Both sides of the elastic ring belt 4 and both ends of the flexible plate 3 are in contact with the inner wall of the frame 1. The opposite surfaces of the first feed port 9 and the second feed port 10 are coplanar with the inner wall of the frame 1 to ensure that the conveyor belt 2 remains stable during operation.

[0022] like Figure 3 The diagram shows a partially enlarged structural schematic of the conveyor belt 2. The structures of the adsorption groove 7 and the air guide groove 8 on the flexible plate 3 are clearly visible. The adsorption groove 7 is used to adsorb and fix the napkin, while the air guide groove 8 is connected to the subsequent flattening assembly to achieve the flattening operation of the napkin. Two air storage chambers 26 are formed opposite each other within the flexible plate 3 at the positions corresponding to the two sets of flattening holes 17. The interior of each air storage chamber 26 communicates with the interior of the corresponding flattening hole 17. An air passage groove 24 is formed on the side wall of the air guide groove 8 at the position corresponding to the flattening hole 17. The interior of the air passage groove 24 communicates with the interior of the corresponding flattening hole 17, thus forming a complete gas flow path.

[0023] like Figure 4 The diagram shows the structure of the flattening assembly and the positioning assembly. The flattening assembly includes a cylinder 16, which is positioned at the center of the elastic ring belt 4. The telescopic end of the cylinder 16 is fixedly connected through the shell wall of the frame 1. Two sets of flattening holes 17 are opened opposite each other on the bottom of the adsorption tank 7. Several flattening holes 17 in the two sets are staggered, and the interior of the flattening holes 17 communicates with the interior of the elastic ring belt 4. When the cylinder 16 is activated, gas is injected into the flattening holes 17 through the air guide pipe 22. The gas enters the air storage chamber 26 through the air passage 24, and then acts on the surface of the napkin through the flattening holes 17, thereby achieving rapid flattening of the napkin. The positioning assembly includes a rigid pad 18. A limiting groove 19 is opened on the bottom of the second feed inlet 10. The bottom of the rigid pad 18 is inserted into the limiting groove 19 and is fixedly connected to the inner wall of the limiting groove 19. The top edge of the rigid pad 18 is rounded, and several limiting holes 20 are provided on the rigid pad 18, with equal spacing between adjacent limiting holes 20. The function of the rigid pad 18 is to apply a limiting constraint force to the napkin in the second feed port 10, ensuring that the napkin remains flat before entering the adsorption tank 7.

[0024] In actual operation, the operator pushes the napkin to be flattened into the first feed port 9. After passing through the first soft pad 11 and the second soft pad 12, the napkin enters the adsorption tank 7. At this time, the negative pressure in the adsorption tank 7 forms an adsorption force through the air guide groove 8 and the ventilation groove 24, firmly fixing the napkin to the flexible plate 3. As the motor 13 drives the transmission roller 14 to rotate, the elastic belt 4 drives the flexible plate 3 to circulate along the inner wall of the frame 1, and the napkin is then transported to the area where the flattening component is located. The cylinder 16 is activated to inject gas into the flattening hole 17 through the air guide pipe 22. The gas enters the air storage chamber 26 through the ventilation groove 24, and then acts on the surface of the napkin through the flattening hole 17, thereby achieving rapid flattening of the napkin. The flattened napkin continues to move with the flexible plate 3 to the second feed port 10. The limiting hole 20 on the rigid pad 18 applies a limiting constraint force to the napkin, ensuring that the napkin remains flat when leaving the adsorption tank 7. The flattened napkin is then output from the second feed port 10, completing the entire flattening process.

[0025] To further improve the operating efficiency and safety of the device, a partition 21 is provided inside the elastic ring belt 4. The partition 21 is located on the top side of the cylinder 16, and both ends of the partition 21 are fixedly connected to the inner wall of the frame 1. The top side of the partition 21 contacts the inner wall of the elastic ring belt 4, and the corners of the partition 21 are arc-shaped to reduce wear on the elastic ring belt 4. A gas guide pipe 22 is fixedly installed inside the partition 21. Several exhaust ends 23 of the gas guide pipe 22 extend to the bottom end of the corresponding flattening hole 17. Several exhaust ends 23 of the gas guide pipe 22 are coplanar with the top side of the partition 21. The exhaust ends 23 of the gas guide pipe 22 penetrate the shell wall of the frame 1 and extend into the limiting groove 19. The gas guide pipe 22 is fixedly connected to the shell wall of the frame 1 and the groove wall of the second feed port 10 to ensure the sealing and stability of the gas flow path. A one-way valve 25 is fixedly installed at the air inlet end of the gas guide pipe 22 to prevent gas backflow from affecting the flattening effect.

[0026] In summary, the automatic napkin flattening device of this invention achieves automatic adsorption, fixation, and rapid flattening of napkins through the coordinated action of components such as the adsorption groove 7, the air guide groove 8, the flattening hole 17, and the air guide tube 22. This device not only improves the flattening efficiency of napkins but also avoids direct contact between the operator and the napkins, enhancing operational safety. Furthermore, the design of the first soft pad 11, the second soft pad 12, the hard pad 18, and the limiting hole 20 ensures a smooth transition and precise positioning of the napkin throughout the flattening process.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Automatic flattening device for napkins, comprising a frame (1); characterized by the fact that, Also include: The flattening assembly includes a conveyor belt (2) provided in the rack (1), the conveyor belt (2) is mainly composed of a plurality of flexible plates (3), elastic ring belt (4) and a plurality of support bars (5), a plurality of the flexible plate (3) is fixedly installed on the outer wall of the elastic ring belt (4), and each support bar (5) is provided between the corresponding two flexible plates (3) and is fixedly connected with the elastic ring belt (4) and the corresponding two flexible plates (3), the elastic ring belt (4) is provided with a driving mechanism (6), the flexible plate (3) is provided with an adsorption groove (7), the bottom of the adsorption groove (7) is provided with a gas guide groove (8), the outer wall of the rack (1) is relatively fixedly provided with a first feeding port (9) and a second feeding port (10) corresponding to the position of the adsorption groove (7), the slot wall of the first feeding port (9) is fixedly provided with a first soft pad (11), the plate wall of the flexible plate (3) is fixedly provided with a second soft pad (12) corresponding to the position of the first soft pad (11), and the top side of the first soft pad (11) and the top side of the second soft pad (12) are coplanar with the bottom of the adsorption groove (7); the flattening assembly is provided in the rack (1), and a flattening constraint force is applied to the napkin in the adsorption groove (7); the positioning assembly is provided in the rack (1), and a limiting constraint force is applied to the napkin in the second feeding port (10).

2. The automatic napkin flattening device according to claim 1, characterized in that: The driving mechanism (6) includes two motors (13), the two motors (13) are fixedly installed on the outer wall of the rack (1), the four corner positions in the elastic ring belt (4) are provided with transmission rollers (14), and the outer peripheral wall of each transmission roller (14) is in interference fit with the inner ring wall of the elastic ring belt (4), the two ends of the transmission roller (14) are rotatably penetrated through the shell wall of the rack (1), and the end of the transmission roller (14) close to the motor (13) is fixedly connected with the corresponding output end of the corresponding motor (13).

3. The automatic napkin flattening device according to claim 2, characterized in that: The top side of the rack (1) is fixedly provided with a guide plate (15), and the bottom side of the guide plate (15) is in contact with the top side of the corresponding flexible plate (3).

4. The automatic napkin flattening device according to claim 3, characterized in that: The two sides of the elastic ring belt (4) and the two ends of the flexible plate (3) are in contact with the inner wall of the rack (1), and the opposite faces of the first feeding port (9) and the second feeding port (10) are coplanar with the inner wall of the rack (1).

5. The automatic napkin flattening device according to claim 4, characterized in that: The flattening assembly includes a gas cylinder (16), the gas cylinder (16) is provided at the middle position in the elastic ring belt (4), and the telescopic end of the gas cylinder (16) is fixedly penetrated through the shell wall of the rack (1), the bottom of the adsorption groove (7) is relatively provided with two groups of flattening holes (17), and a plurality of flattening holes (17) in the two groups are arranged in a staggered manner, and the inside of the flattening hole (17) is communicated with the inside of the elastic ring belt (4).

6. The automatic napkin flattening device according to claim 5, characterized in that: The positioning assembly comprises a hard pad (18), a limiting groove (19) is arranged in the bottom of the second feeding port (10), and the bottom of the hard pad (18) is inserted into the limiting groove (19) and fixedly connected with the inner wall of the limiting groove (19), the corners of the top side of the hard pad (18) are arranged in an arc shape, and a plurality of limiting holes (20) are arranged in the hard pad (18), and the spacing between adjacent two limiting holes (20) is equal.

7. The automatic napkin flattening device according to claim 6, characterized in that: The elastic ring belt (4) is provided with a partition plate (21), and the partition plate (21) is located at the top side of the air cylinder (16); the two ends of the partition plate (21) are fixedly connected with the inner wall of the rack (1), and the top side of the partition plate (21) is in contact with the inner wall of the elastic ring belt (4); and the corners of the partition plate (21) are arranged in an arc shape.

8. The automatic napkin flattening device according to claim 7, characterized in that: The partition plate (21) is fixedly provided with an air guide pipe (22), and a plurality of exhaust ends (23) of the air guide pipe (22) extend to the bottom ends of the corresponding flattening holes (17) respectively; the plurality of exhaust ends (23) of the air guide pipe (22) are coplanar with the top side of the partition plate (21); the exhaust ends (23) of the air guide pipe (22) penetrate the shell wall of the rack (1) and extend into the limiting groove (19); and the air guide pipe (22) is fixedly connected with the shell wall of the rack (1) and the groove wall of the second feeding port (10).

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